Graupner and KG MX-12 Computer System Graupner HoTT User Manual 33112 mx12 HoTT 2 GB indd
Graupner GmbH & Co. KG Computer System Graupner HoTT 33112 mx12 HoTT 2 GB indd
User Manual
33112.mx-12 HoTT.2.gb H O P P I N G . T E L E M E T R Y . T R A N S M I S S I O N mx-12 H O P P I N G . T E L E M E T R Y . T R A N S M I S S I O N GRAUPNER GMBH & CO. KG POSTFACH 1242 D-73220 KIRCHHEIM/TECK GERMANY Modifications and availability reserved. Graupner products are only available through model shops. We will gladly inform you of your nearest stockist. We accept no liability for printing errors. http://www.graupner.de Printed in Germany PN.PG-02 33112_Um_mx12_HoTT_2_GB.indd 1 Although we have carefully checked the information contained in these instructions and checked that it is correct, we can accept no liability of any kind for mistakes, incomplete information and printing errors. Graupner reserves the right to alter the characteristics and features of the software and hardware at any time and without prior notification. Programming Manual 06.06.2011 19:46:36 Contents Guarantee certificate General Information Safety Notes .................................................................. 3 Safety notes and handling instructions relating to Nickel-Metal-Hydride rechargeable batteries ............ 8 Foreword...................................................................... 10 Description of radio control set .................................... 11 Recommended battery chargers ................................. 13 Transmitter power supply ............................................. 14 Receiver power supply ................................................ 16 Environmental protection notes ................................... 16 Adjusting the stick length ............................................. 17 Opening the transmitter case ...................................... 17 Changing the stick mode ............................................. 18 Description of transmitter............................................. 20 Transmitter controls ............................................... 20 Rear of transmitter................................................. 21 Optional headphone socket................................... 21 PC socket .............................................................. 21 Data socket ........................................................... 21 DSC (Direct Servo Control) ................................... 22 Data storage / card slot ......................................... 22 Screen and keypad ............................................... 24 Operating the “Data Terminal” ............................... 25 Short-cuts .............................................................. 25 Language selection, screen contrast..................... 26 On-screen warnings .............................................. 28 On-screen function fields....................................... 28 Position indicator, rotary controls CTRL 7 + 8 ....... 29 Input lock ............................................................... 29 Using the transmitter for the first time .......................... 30 Using the receiver for the first time .............................. 32 Installation notes.......................................................... 34 Receiving system power supply ............................ 35 Definition of terms ....................................................... 38 Switch and transmitter control assignment .................. 39 Contents 33112_Um_mx12_HoTT_2_GB.indd 2 Digital trims .................................................................. 40 Fixed-wing model aircraft............................................. 42 Receiver socket sequence .................................... 43 Model helicopters ........................................................ 46 Receiver socket sequence .................................... 47 Program descriptions Setting up a new model memory ................................. 48 “Model memories” ...................................................... 52 “Base settings” (model) Fixed-wing model aircraft ...................................... 56 Binding receivers............................................. 61 Range-checking .............................................. 62 Model helicopter .................................................... 64 Binding receivers............................................. 70 Range-checking .............................................. 71 “Servo settings”.......................................................... 72 “Transmitter control settings” Fixed-wing model aircraft ...................................... 74 Model helicopter .................................................... 76 Throttle limit function ....................................... 79 Basic idle setting ............................................. 79 “D/R Expo” Fixed-wing model aircraft ...................................... 82 Model helicopter .................................................... 84 “Phase trim” (fixed-wing) ............................................ 86 What is a mixer? .......................................................... 88 “Wing mixer”.............................................................. 88 “Heli mixer” ................................................................ 94 Setting up throttle and collective pitch curves ..... 100 Auto-rotation setting ............................................ 104 General notes re. freely programmable mixers .......... 106 “Free mixers” ........................................................... 107 Examples............................................................. 111 “Swashplate mixers”............................................... 112 “Servo display” ......................................................... 113 “Basic settings” ........................................................ 114 “Fail-Safe” ................................................................. 116 “Telemetry” ............................................................... 117 Setting & Data view ............................................. 118 Satellite operation with two receivers ............ 126 Simple data view ................................................. 128 RF status view ..................................................... 130 Voice trigger ........................................................ 131 “Trainer mode” ......................................................... 134 Wiring diagrams .................................................. 137 Wireless HoTT system ........................................ 138 “Info display” ........................................................... 142 Programming examples Introduction ................................................................ 144 Fixed-wing model aircraft First steps ............................................................ 146 Including an electric power system ..................... 150 E-motor and up-aileron using Ch1 stick .............. 152 Operating timers .................................................. 155 Use of flight phases ............................................. 156 Servos running in parallel .................................... 157 Deltas and flying wings .............................................. 158 F3A models ............................................................... 162 Model helicopters ...................................................... 166 Appendix Appendix.................................................................... 174 Conformity declaration............................................... 177 FCC Information ........................................................ 178 Guarantee certificate ................................................. 179 Servicestellen / Service / Service après-vente Graupner-Zentralservice Graupner GmbH & Co. KG Henriettenstrasse 94 - 96 D-73230 Kirchheim Servicehotline (+49) 0 18 05 47 28 76* Montag - Freitag 9:30-11:30 + 13:00-15:00 Uhr Belgie/Belgique/Nederland Jan van Mouwerik Slot de Houvelaan 30 NL 3155 Maasland VT (+31) 10 59 13 59 4 Luxembourg Kit Flammang 129, route d’Arlon L 8009 Strassen (+35) 23 12 23 2 Ceská Republika Slovenská Republika RC Service Z. Hnizdil Letecka 666/22 CZ 16100 Praha 6 - Ruzyne (+42) 2 33 31 30 95 Schweiz Graupner Service Wehntalerstrasse 37 CH 8181 Höri (+41) 43 26 66 58 3 Espana Anguera Hobbies C/Terrassa 14 E 43206 Reus (Tarragona). (+34) 97 77 55 32 0 info@anguera-hobbies.com Sverige Baltechno Electronics Box 5307 S 40227 Göteborg (+46) 31 70 73 00 0 France Graupner France Gérard Altmayer 86, rue St. Antoine F 57601 Forbach-Oeting (+33) 3 87 85 62 12 United Kingdom Graupner Service Brunel Drive GB, NEWARK, Nottinghamshire NG242EG (+44) 16 36 61 05 39 Italia GiMax Via Manzoni, no. 8 I 25064 Gussago (+39) 030 25 22 73 2 0,14 Cent / Minute aus dem Festnetz der deutschen T-Com. Abweichende Preise für Anrufe aus Mobilfunknetzen oder aus dem Festnetz anderer Anbieter möglich. Wir gewähren auf dieses Erzeugnis eine Garantie von This product is warrantied for Sur ce produit nous accordons une garantie de Die Fa. Graupner GmbH & Co. KG, Henriettenstraße 94 - 96, D-73230 Kirchheim/Teck gewährt ab dem Kaufdatum auf dieses Produkt eine Garantie von 24 Monaten. Die Garantie gilt nur für die bereits beim Kauf des Produktes vorhandenen Material- oder Funktionsmängel. Schäden, die auf Abnützung, Überlastung, falsches Zubehör oder unsachgemäße Behandlung zurückzuführen sind, sind von der Garantie ausgeschlossen. Die gesetzlichen Rechte und Gewährleistunsansprüche des Verbrauchers werden durch diese Garantie nicht berührt. Bitte überprüfen Sie vor einer Reklamation oder Rücksendung das Produkt genau auf Mängel, da wir Ihnen bei Mängelfreiheit die entstandenen Unkosten in Rechnung stellen müssen. 24 Monaten months mois Garantie-Urkunde Warranty certificate / Certificat de garantie mx-12 HoTT Set Order No. 33112 Graupner GmbH & Co. KG, Henriettenstraße 94 - 96. D-73230 Kirchheim/Teck, Germany guarantees this product for a period of 24 months from date of purchase. The guarantee applies only to such material or operational defects witch are present at the time of purchase of the product. Damage due to wear, overloading, incompetent handling or the use of incorrect accessories is not covered by the guarantee. The user´s legal rights and claims under guarantee are not affected by this guarantee. Please check the product carefully for defects before you are make a claim or send the item to us, since we are obliged to make a charge for our cost if the product is found to be free of faults. Übergabedatum: Date of purchase/delivery: Date d’achat : La société Graupner GmbH & Co. KG, Henriettenstraße 9496, D-73230 Kirchheim/Teck, accorde sur ce produit une garantie de 24 mois à compter de la date d’achat. La garantie ne s’applique qu’aux défauts de matériel et de fonctionnement du produit acheté. Les dommages dus à une usure, à une surcharge, à l’emploi d’accessoires non compatibles ou à une manipulation non conforme sont exclus de la garantie. Cette garantie ne remet pas en cause les droits légaux des consommateurs. Avant toute réclamation ou retour de matériel, vérifiez précisément les défauts ou vices constatés, car si le matériel est conforme et qu’aucun défaut n’a été constaté par nos services, nous nous verrions contraints de facturer le coût de cette intervention. Firmenstempel und Unterschrift des Einzelhändlers: Stamp and signature of dealer: Cachet et signature du détaillant : Name des Käufers: Owner´s name: Nom de I`acheteur : Straße, Wohnort: Complete address: Adresse complète : Guarantee certificate 179 06.06.2011 19:46:54 Safety Notes Please read carefully! We all want you to have many hours of pleasure in our mutual hobby of modelling, and safety is an important aspect of this. It is absolutely essential that you read right through these instructions and take careful note of all our safety recommendations. We also strongly recommend that you register without delay at http:// www.graupner.de/en/service/product_registration, as this ensures that you automatically receive the latest information relating to your product by e-mail. If you are a beginner to the world of radio-controlled model aircraft, boats and cars, we strongly advise that you seek out an experienced modeller in your field, and ask him or her for help and advice. If you ever dispose of this transmitter, these instructions must be passed on to the new owner. Application This radio control system may only be used for the purpose for which the manufacturer intended it, i. e. for operating radio-controlled models which do not carry humans. No other type of use is approved or permissible. Safety notes SAFETY IS NO ACCIDENT and RADIO-CONTROLLED MODELS ARE NOT PLAYTHINGS Even small models can cause serious personal injury and damage to property if they are handled incompetently, or if an accident occurs due to the fault of others. Technical problems in electrical and mechanical systems can cause motors to rev up or burst into life unexpectedly, with the result that parts may fly off at great speed, causing considerable injury. Short-circuits of all kinds must be avoided at all times. Short-circuits can easily destroy parts of the radio control system, but even more dangerous is the acute risk of fire and explosion, depending on the circumstances and the energy content of the batteries. Aircraft and boat propellers, helicopter rotors, open gearboxes and all other rotating parts which are driven by a motor or engine represent a constant injury hazard. Do not touch these items with any object or part of your body. Remember that a propeller spinning at high speed can easily slice off a finger! Ensure that no other object can make contact with the driven components. Never stand in the primary danger zone, i. e. in the rotational plane of the propeller or other rotating parts, when the motor is running or the drive battery is connected. Please note that a glowplug engine or electric motor could burst into life accidentally if the receiving system is switched on when you are transmitting the transmitter. To be on the safe side, disconnect the fueltank or the flight battery. Protect all electronic equipment from dust, dirt, damp, and foreign bodies. Avoid subjecting the equipment to vibration and excessive heat or cold. Radio control equipment should only be used in “normal” ambient temperatures, i. e. within the range -15°C to +55°C. Avoid subjecting the equipment to shock and pressure. Check the units at regular intervals for damage to cases and leads. Do not re-use any item which is damaged or has become wet, even after you have dried it out thoroughly. Use only those components and accessories which we expressly recommend. Be sure to use only genuine matching Graupner connectors of the same design with contacts of the same material. When deploying cables ensure that they are not under strain, are not tightly bent (kinked) or broken. Avoid sharp edges, as they can chafe through insulating materials. Before you use the system, check that all connectors are pushed home firmly. When disconnecting components, pull on the connectors themselves – not on the wires. It is not permissible to carry out any modifications to the RC system components, as any such changes invalidate both your operating licence and your insurance cover. Installing the receiving system In a model aircraft the receiver must be packed in soft foam and stowed behind a stout bulkhead, and in a model boat or car it should be protected effectively from dust and spray. The receiver must not make direct contact with the fuselage, hull or chassis at any point, otherwise motor vibration and landing shocks will be transmitted directly to it. When installing the receiving system in a model with a glowplug or petrol engine, be sure to install all the components in well-protected positions, so that no exhaust gas or oil residues can reach the units and get inside them. This applies above all to the ON / OFF switch, which is usually installed in the outer skin of the model. Secure the receiver in such a way that the aerial, servo leads and switch harness are not under any strain. The receiver aerial should be at least 5 cm away from all large metal parts and any wiring which is not connected directly to the receiver. This includes steel and carbon fibre components, servos, electric motors, fuel pumps, cabling of all kinds, etc.. Ideally the receiver should be installed well away from Safety Notes 33112_mx12_HoTT_2_GB.indd Abs2:3 06.06.2011 19:39:13 Safety Notes any other installed equipment in the model, but in an easily accessible position. Under no circumstances allow servo leads to run close to the aerial, far less coiled round it! Ensure that cables are fastened securely, so that they cannot move close to the receiver aerial when the model is flying. Deploying the receiver aerial(s) The receiver and its aerials should be installed as far away as possible from all kinds of power system. If your model has a carbon fibre fuselage, the aerial tips must always be deployed outside the fuselage. The orientation of the aerial(s) is not critical, but we recommend installing them vertically (upright) in the model. If the receiver features aerial diversity (two aerials), the second aerial should be arranged at 90° to the first. Installing the servos Always install servos using the vibration-damping grommets supplied. The rubber grommets provide some degree of protection from mechanical shock and severe vibration. Installing control linkages The basic rule is that all linkages should be installed in such a way that the pushrods move accurately, smoothly and freely. It is particularly important that all servo output arms can move to their full extent without fouling or rubbing on anything, or being obstructed mechanically at any point in their travel. It is essential that you should be able to stop your motor at any time. With a glow motor this is achieved by adjusting the throttle so that the barrel closes completely when you move the throttle stick and trim to their end-points. Ensure that no metal parts are able to rub against each other, e. g. when controls are operated, when parts rotate, or when motor vibration affects the model. Metalto-metal contact causes electrical “noise” which can interfere with the correct working of the receiver. Directing the transmitter aerial Transmitter field strength is at a minimum in an imaginary line extending straight out from the transmitter aerial. It is therefore fundamentally misguided to “point” the transmitter aerial at the model with the intention of obtaining good reception. When several radio control systems are in use on adjacent channels, the pilots should always stand together in a loose group. Pilots who insist on standing away from the group endanger their own models as well as those of the other pilots. However, if two or more pilots operating 2.4 GHz radio control systems stand closer together than 5 m, the down-link channel may be swamped, triggering a very premature range warning. If this should occur, walk away from the other pilots until the range warning ceases again. Pre-flight checking Before you switch on the receiver, ensure that the throttle stick is at the stop / idle end-point. Always switch on the transmitter first, and only then the receiver. Always switch off the receiver first, and only then the transmitter. If you do not keep to this sequence, i. e. if the receiver is at any time switched on when “its” transmitter is switched OFF, then the receiver is wide open to signals from other transmitters and any interference, and may respond. The model could then carry out uncontrolled movements, which could easily result in personal injury or damage to property. Please take particular care if your model is fitted with a mechanical gyro: before you switch your receiver off, disconnect the power supply to ensure that the motor cannot run up to high speed accidentally. As it runs down, the gyro can generate such a high voltage that the receiver picks up apparently valid throttle commands, and the motor could respond by unexpectedly bursting into life. Range checking Before every session check that the system works properly in all respects, and has adequate range. Secure the model adequately, and ensure that no persons are standing in front of the model. Carry out at least one complete function check on the ground, followed by a complete simulated flight, in order to show up any errors in the system and the model’s programming. Be sure to read the notes on pages 62 and 71 in this regard. When operating a model, i. e. when flying or driving, do not operate the transmitter without the aerial fitted. Check that the transmitter aerial is firmly seated. Operating your model aircraft, helicopter, boat or car Never fly directly over spectators or other pilots, and take care at all times not to endanger people or animals. Keep well clear of high-tension overhead cables. Never operate your model boat close to locks and full-size vessels. Model cars should never be run on public streets or motorways, footpaths, public squares etc.. Safety Notes 33112_mx12_HoTT_2_GB.indd Abs2:4 06.06.2011 19:39:25 Checking the transmitter and receiver batteries It is essential to stop using the radio control system and recharge the batteries well before they are completely discharged. In the case of the transmitter this means – at the very latest – when the message “battery needs charging” appears on the screen, and you hear an audible warning signal. It is vital to check the state of the batteries at regular intervals – especially the receiver pack. When the battery is almost flat you may notice the servos running more slowly, but it is by no means safe to keep flying or running your model until this happens. Always replace or recharge the batteries in good time. Keep to the battery manufacturer’s instructions, and don’t leave the batteries on charge for longer than stated. Do not leave batteries on charge unsupervised. Never attempt to recharge dry cells, as they may explode. Rechargeable batteries should always be recharged before every session. When charging batteries it is important to avoid short-circuits. Do this by first connecting the banana plugs on the charge lead to the charger, taking care to maintain correct polarity. Only then connect the charge lead to the transmitter or receiver battery. Disconnect all batteries and remove them from your model if you know you will not be using it in the near future. Capacity and operating times This rule applies to all battery types: capacity diminishes with each charge. At low temperatures the battery’s internal resistance rises, and capacity falls. This means that its ability to deliver current and maintain voltage is reduced. Frequent charging, and / or the use of maintenance programs, tends to cause a gradual reduction in battery capacity. We recommend that you check the capacity of all your rechargeable batteries at least every six months, and replace them if their performance has fallen off significantly. Use only genuine Graupner rechargeable batteries! Suppressing electric motors All conventional (brushed) electric motors generate sparks between the commutator and the brushes, which cause more or less serious interference to the radio control system, depending on the type of motor. If an RC system is to work correctly, it is therefore important to suppress the electric motors, and in electric-powered models it is essential that every motor should be effectively suppressed. Suppressor filters reliably eliminate such interference, and should always be fitted where possible. Please read the notes and recommendations supplied by the motor manufacturer. Refer to the main Graupner FS catalogue or the Internet website at www.graupner.de for more information on suppressor filters. must be chosen to suit the size of the electric motor it is required to control. There is always a danger of overloading and possibly damaging the speed controller, but you can avoid this by ensuring that the controller’s current-handling capacity is at least half the motor’s maximum stall current. Particular care is called for if you are using a “hot” (i. e. upgrade) motor, as any low-turn motor (small number of turns on the winding) can draw many times its nominal current when stalled, and the high current will then burn out the speed controller. Electrical ignition systems Ignition systems for internal combustion engines can also produce interference, which has an adverse effect on the working of the radio control system. Electrical ignition systems should always be powered by a separate battery – not the receiver battery. Be sure to use effectively suppressed spark plugs and plug caps, and shielded ignition leads. Keep the receiving system an adequate distance away from the ignition system. Servo suppressor filter for extension leads Order No. 1040 Servo suppressor filters are required if you are obliged to use long servo extension leads, as they eliminate the danger of de-tuning the receiver. The filter is connected directly to the receiver input. In very difficult cases a second filter can be used, positioned close to the servo. Static charges Lightning causes magnetic shock waves which can interfere with the operation of a radio control transmitter even if the thunderstorm actually occurs several kilometres away. For this reason … … cease flying operations immediately if you notice an electrical storm approaching. Static charges through the transmitter aerial can be life-threatening! Using electronic speed controllers The basic rule is that the electronic speed controller Caution • In order to fulfil the FCC RF radiation regulations Safety Notes 33112_mx12_HoTT_2_GB.indd Abs2:5 06.06.2011 19:39:25 Safety Notes • • • • applicable to mobile transmitting apparatus, the equipment’s aerial must be at least 20 cm from any person when the system is in use. We therefore do not recommend using the equipment at a closer range than 20 cm. Ensure that no other transmitter is closer than 20 cm from your equipment, in order to avoid adverse effects on the system’s electrical characteristics and radiation pattern. The radio control system should not be operated until the Country setting has been set correctly at the transmitter. This is essential in order to fulfil the requirements of various directives - FCC, ETSI, CE etc. Please refer to the instructions for your particular transmitter and receiver for details of this procedure. Check all working systems and carry out at least one full range check on the ground before every flight, in order to show up any errors in the system and the model’s programming. Never make any changes to the programming of the transmitter or receiver whilst operating a model. Care and maintenance Don’t use cleaning agents, petrol, water or other solvents to clean your equipment. If the case, the aerial etc. gets dirty, simply wipe the surfaces clean with a soft dry cloth. Components and accessories As manufacturers, the company of Graupner GmbH & Co. KG recommends the exclusive use of components and accessories which have been tested by Graupner and approved for their capability, function and safety. If you observe this rule, Graupner accepts responsibility for the product. Graupner cannot accept liability for non-approved components or accessories made by other manufacturers. It is not possible for Graupner to assess every individual item manufactured by other companies, so we are unable to state whether such parts can be used without incurring a safety risk. Liability exclusion / Compensation It is not possible for Graupner to ensure that the user observes the installation and operation instructions, and the recommended conditions and methods when installing, operating, using and maintaining the radio control components. For this reason Graupner denies all liability for loss, damages or costs which arise through misuse or mishandling of this equipment, or are connected with such use in any way. Unless obliged by law, Graupner’s obligation to pay compensation, regardless of the legal argument employed, is limited to the invoice value of that quantity of Graupner products which were immediately involved in the event in which the damage occurred, unless the company is deemed to have unlimited liability on account of deliberate or gross negligence. The sole purpose of this manual is to provide information; it is subject to amendment without prior notification. Graupner accepts no responsibility or liability for errors or inaccuracies which may occur in the information section of this manual. Environmental protection This symbol on the product, in the operating instructions or the packaging indicates that the product must not be discarded via the normal household refuse at the end of its useful life. Instead it must be taken to a collection point for the recycling of electrical and electronic apparatus. The materials can be re-used according to their identification code. You can make an important contribution to the protection of our shared environment by recycling old equipment and making use of its basic materials. Dry and rechargeable batteries must be removed from the device and taken to the appropriate collection point. Please ask your local authority for the location of your nearest waste disposal site. Safety Notes 33112_mx12_HoTT_2_GB.indd Abs2:6 06.06.2011 19:39:25 For your notes 33112_mx12_HoTT_2_GB.indd Abs56:7 06.06.2011 19:39:25 Safety notes and handling instructions relating to Nickel-Metal-Hydride rechargeable batteries As with all sophisticated technical products, it is vitally important that you observe the following safety notes and handling instructions if you wish the equipment to operate safely and reliably for an extended period. Safety notes • Rechargeable batteries are not playthings, and must be kept well away from children. Store rechargeable batteries out of the reach of children. • Check that the batteries are in perfect, serviceable condition before every use. Do not re-use defective or damaged batteries. • Rechargeable batteries must be used within the specified limits stated for the corresponding cell type. • Do not heat, incinerate or short-circuit rechargeable batteries, and never charge them with excessive currents or reversed polarity. • Never use rechargeable batteries consisting of parallel-wired cells, combinations of old and new cells, cells of different construction, size, capacity, make, brand or cell type. • Batteries installed inside equipment should always be removed from the device when it is not in use and not about to be used. Always keep equipment switched off in order to avoid deep-discharged cells. Batteries must be recharged in good time. • The battery to be charged should be placed on a non-inflammable, heat-resistant, non-conductive surface for the whole of the charge period. Keep inflammable and volatile objects and materials well clear of the charging area. • Batteries must always be supervised when on charge. Never exceed the maximum fast-charge cur8 • • • • • • • • • rent specified for the cell type in use. If the battery heats up to more than 60°C whilst on charge, halt the charge process immediately and allow the pack to cool down to about 30°C. Never recharge a battery which is already charged, hot, or not completely discharged. Do not make any modifications to batteries. Never solder or weld directly to cells. If incorrectly handled, rechargeable batteries are at risk of combustion, explosion, corrosive action and burns. Suitable extinguishing materials include fire blankets, CO2 fire extinguishers and sand. Escaped electrolyte is corrosive - do not allow it to contact skin or eyes. In an emergency rinse the area immediately with plenty of clean water before seeking medical help. The cells’ air vents must never be blocked or sealed, e. g. by solder. When soldering, the iron temperature should not exceed 220°C, and each joint should be completed in less than twenty seconds. To avoid cell deformation, do not exert excessive mechanical pressure on battery cells. If a battery should be accidentally overcharged, use the following procedure: Simply disconnect the battery and leave it on a noninflammable surface (e. g. stone floor) until it has cooled down. Never hold the battery in your hand, as there is a risk that cells might explode. Always observe the recommended rates for charging and discharging. General information The capacity of your rechargeable battery diminishes with every charge / discharge process. Stored batteries may eventually exhibit reduced capacity. Storage Batteries should not be stored in a completely discharged state. Store them in a dry enclosed space at an ambient temperature of +5°C to +25°C. If you are storing a battery for a period longer than four weeks, ensure that the cell voltage does not fall below 1.2 V Balancing individual battery cells • To balance new battery cells, i. e. to bring them all to the same state of charge, charge them at what is known as the ‘normal’ rate until they are full. As a general guideline a fully discharged battery needs to be charged for a period of twelve hours at a current corresponding to one tenth of the capacity printed on the cell label (the “1/10C” method). After this treatment all the cells will be fully charged, and exhibit the same voltage. This method of balancing battery cells should be repeated after every ten fast-charge processes, so that the cells are repeatedly balanced; this helps to ensure an extended useful life for your batteries. • If you have the facilities to discharge individual cells, we recommend that you make use of this before every charge process. Otherwise the battery pack should be run down to a discharge voltage of 0.9 V per cell. For example, this corresponds to a final discharge voltage of 3.6 V in the case of the four-cell pack used in the transmitter. Charging Ni-MH batteries should only be charged using the specified currents, charge times and temperature range, and should be supervised constantly when on charge. If you do not have access to a suitable fast charger, i. e. one Safety Notes 33112_mx12_HoTT_2_GB.indd Abs57:8 06.06.2011 19:39:25 which allows you to set the charge current accurately, then the battery should always be recharged using the “normal” charge rate of 1/10C; see the example stated above. Wherever possible, transmitter batteries should always be recharged at the 1/10C rate, in order to avoid differences in cell states. The charge current must never exceed the maximum permissible value stated in the transmitter instructions. Fast charging • If your battery charger includes the facility to adjust the Delta Peak charge cut-off voltage, set this value to 5 mV per cell. However, most chargers are set to a fixed cut-off value of 15 … 20 mV per cell, which makes them suitable for use with both NiCd and NiMH batteries. If you are not sure about this, please refer to the operating instructions supplied with your charger, or ask at your local model shop whether your charger is also suitable for Ni-MH packs. If in any doubt, charge your batteries at half the stated maximum charge current. Discharging All rechargeable batteries sold by Graupner and GMRacing are suitable for a maximum continuous current load of 6C … 13C, according to battery type (refer to the manufacturer’s specification!). The higher the continuous current load, the shorter the batteries’ useful life. • Use your battery until its performance falls off, or until the low voltage warning is triggered. Caution: When stored for a long period, the cell voltage should not be allowed to fall below 1.2 V. This means that you may have to recharge the battery before stor- ing it. • Reflex charging and charge / discharge (cycle) programs shorten the effective life of batteries unnecessarily, and are only suitable for checking battery quality or “reviving” relatively old cells. It also makes no sense to charge / discharge a battery before using it - unless you simply wish to check its quality. Disposal of exhausted dry and rechargeable batteries The German Battery Order places a legal requirement on every consumer to return all used and exhausted dry cells and rechargeable batteries. It is prohibited to dispose of these items in the ordinary domestic waste. At no charge to the user, old dry and rechargeable batteries can be surrendered at local authority collection points, Graupner retail outlets, and any other shop where dry and rechargeable batteries of the same type are sold. You can also send batteries supplied by us to the following address - with adequate pre-paid postage - for disposal: Graupner GmbH & Co. KG Service: Gebrauchte Batterien (Used batteries) Henriettenstr. 94 - 96 D-73230 Kirchheim unter Teck You can make an important contribution to environmental protection in this way. Caution: Damaged batteries may require special packaging before despatch, as some contain highly toxic materials!!!!! Safety Notes 33112_mx12_HoTT_2_GB.indd Abs57:9 06.06.2011 19:39:25 mx-12 the latest generation of radio control technology HoTT (Hopping Telemetry Transmission) is the synthesis of expertise, engineering and world-wide testing by professional pilots. The equipment operates on the 2.4 GHz band, and offers bi-directional communication between transmitter and receiver via a down-link channel integrated into the receiver. The mx-12 HoTT RC system is based on the Graupner/JR mc-24 computer radio control system which was introduced back in 1997. It has been developed specifically for the beginner, but the mx-12 HoTT is still capable of controlling all current model types without problem - whether fixed-wing model or helicopter, model boat or car. In the area of fixed-wing models and helicopters it is often necessary to employ complex mixer functions for the control surfaces or the swashplate actuation system. Computer technology enables you to activate a vast range of functions to cope with special model requirements – just by pressing a button. With the mx12 HoTT all you do is select the appropriate model type, and the software then presents you automatically with the appropriate mixer and coupling functions. This means that the transmitter requires no additional modules in order to implement complex coupled functions, and you can forget all about old-fashioned mechanical mixers in the model. The mx-12 HoTT provides an extremely high level of safety and reliability in use. The mx-12 HoTT offers ten model memories, each of which can store model settings for different flight phases. Individual phases can be called up in flight simply by operating a switch, so that you can try out various settings quickly and without risk. This can be for test purposes or for varying parameters for different phases of flight. 10 The large graphic screen makes operating the transmitter a simple, intuitive process. Mixers and other functions can be displayed in graphic form, and this is extraordinarily helpful. The beginner quickly becomes familiar with the different functions thanks to the clear, logically arranged program structure. Four-way buttons to left and right of the highcontrast screen are used to enter settings, allowing the user to exploit all the options he needs, in accordance with his experience in handling radio-controlled models. In theory the Graupner HoTT process allows more than 200 models to be operated simultaneously. Although in practice the mixed operation of different technical systems in the 2.4 GHz ISM band – as required by the approval regulations – reduces this number considerably. Generally, however, it will always be possible to operate even more models simultaneously on the 2.4 GHz band than on the 35 / 40 MHz frequency bands which we have used to date. However, the actual limiting factor – as it has always been – is likely to remain the size of the (air-) space available. The simple fact that no frequency control procedure is necessary equates to an enormous gain in safety, especially at flying sites such as gliding slopes where groups of pilots may be distributed over a large area, with nobody in overall control. The integral Telemetry menu provides a simple means of accessing data and programming HoTT receivers. For example, this method can be used to map receiver outputs, distribute control functions to multiple servos, and match servo travels and directions to each other. This manual describes each menu in detail, and also provides dozens of useful tips, notes and programming examples to complement the basic information. More general modelling terms, such as Transmitter controls, Dual-Rates, Butterfly (Crow) and many others, are all explained in the manual. Please refer to the Appendix for additional information on the HoTT system. This manual concludes with the transmitter’s conformity declaration and guarantee certificate. Please read the safety notes and the technical information. We recommend that you read right through the instructions with great care, and check all the functions as described in the text. This can be carried out simply by connecting servos to the supplied receiver, and watching their response as you program the transmitter. However, please read the notes on page 20 in this regard. This is the quickest method of becoming familiar with the essential procedures and functions of the mx12 HoTT. Always handle your radio-controlled model with a responsible attitude to avoid endangering yourself and others. The Graupner team wishes you great pleasure and success with your mx-12 HoTT - a radio control system of the latest generation. Kirchheim-Teck, June 2011 Introduction 33112_mx12_HoTT_2_GB.indd Abs3:10 06.06.2011 19:39:25 mx-12 Computer System Six-channel radio control set with Graupner HoTT 2.4 GHz technology (Hopping Telemetry Transmission) Graupner HoTT technology offers excellent reliability in use, with bi-directional communication between transmitter and receiver, integrated telemetry and ultra-fast response times. Simplified programming technology with four-way push-buttons. High-contrast eight-line graphic screen with blue backlighting for ultra-clear display of all set-up parameters and telemetry data. A micro-SD memory card can be used to back-up model data and store telemetry data. 12-bit / 4096-step channel signal resolution for extremely fine control characteristics. • Micro-computer radio control system exploiting the latest Graupner HoTT 2.4 GHz technology • Bi-directional communication between transmitter and receiver • Five different languages German and English; subsequent software updates will offer French, Italian and Spanish. • Ultra-fast response times through direct, ultra-reliable data transmission from the main processor to the 2.4 GHz RF module. No additional delay caused by detours through a module processor. • Telemetry menu for displaying telemetry data, and programming receiver outputs and optional sensors. • Telemetry display shows numerous programming and analysis functions directly on the transmitter screen. • Speech output possible using optional speech output module, Order No. 33001.71 • User-selectable servo cycle times for digital servos, min. 10 ms • Short, folding aerial • Methods of operation and programming based on the proven concepts of the mc-19 to mc-24 • High-contrast graphic screen with blue backlighting ensures perfect monitoring of set-up parameters, such as model type, model memory, timers and operating voltage. • Function encoder with two four-way buttons for simplified programming and accurate settings • Key-Lock function to guard against accidental operation. • Three programmable flight phases • Ten model memories, with storage of all modelspecific programming and set-up parameters Description of radio control set 33112_mx12_HoTT_2_GB.indd Abs4:11 11 06.06.2011 19:39:25 mx-12 Computer System Six-channel radio control set with Graupner HoTT 2.4 GHz technology (Hopping Telemetry Transmission) • Four switches (two three-way switches, one two-way switch and one momentary switch), plus two digital controls - already installed and extremely versatile • Unrestricted assignment of all switches to switched functions simply by operating the appropriate switch • Storage of model memories using the latest batteryfree back-up system • Six control functions with simplified, very convenient assignment of transmitter controls for auxiliary functions, such as switches and proportional controls • Convenient mode selector provides simple method of changing the stick mode (modes 1 - 4, e. g. throttle right / throttle left). When you change modes, all the affected settings are switched at the same time. • Graphical servo display provides a straightforward overview of the servo set-up, and a swift method of checking servo travels • Receiver output swap • Comprehensive programs for fixed-wing model aircraft and helicopters: Fixed-wing menu for: 1 AIL, 2 AIL, 2 AIL + 2 FLAP, Vtail, delta / flying wing, two elevator servos Fixed-wing mixer: diff aile, diff.flaps, ail ¼ rudd, ail ¼ flaps, brake ¼ elev, brake ¼ flap, brake ¼ aile, elev ¼ flap, elev ¼ aile, flap ¼ elev, flap ¼ aile and diff. reduction • Heli menu: 1-point, 2-point, 3-point and 4-point linkages (1 servo, 2 servo, 3sv(2roll), 3sv(140°), 3sv(2nick (pitch-axis)), 4 SV (90°)) • Swashplate limiter • Servo travel adjustment +/- 150% for all servo outputs, variable separately for each side (Single Side 12 • • • • • • Servo Throw) Variable sub-trim, range +/- 125%, for adjusting the neutral position of all servos Servo reverse, programmable for all servos EXPO / DUAL-RATE system, separately variable, can be switched in-flight, flight phase programmable Stopwatch / count-down timer with alarm function Model memory copy function Integral DSC socket for use with flight simulators and Trainer systems • More than 200 systems can be operated simultaneously • Future-proof update capability using data interface General features of the HoTT system • Simple, ultra-fast binding of transmitter and receiver • Multiple receivers can be bound per model for parallel operation • Extremely fast re-binding, even at maximum range • Two-receiver satellite operation using special cable connection • Range-check and warning function • Receiver low-voltage warning on transmitter screen • Ultra-wide receiver operating voltage range: 3.6 V to 8.4 V (fully operational down to 2.5 V) • Fail-Safe • Unrestricted channel assignment (channel-mapping), mixer functions and all servo settings programmable in the Telemetry menu • Up to four servos can be actuated simultaneously as a block, with a servo cycle time of 10 ms (digital servos only) • Optimised frequency hopping and broad channel spread for maximum interference rejection • Intelligent data transmission with corrective function • Real-time telemetry analysis Description of radio control set 33112_mx12_HoTT_2_GB.indd Abs4:12 06.06.2011 19:39:26 The set Order No. 33112 contains: mx-12 HoTT micro-computer transmitter with integral 4NH-2000 RX RTU flat-pack Ni-MH transmitter battery (specification reserved), Graupner GR-12 HoTT bi-directional receiver, switch harness and plug-type battery charger Order No. Description 220 V mains conn. 12 V DC connect. NiCd Ni-MH LiPo Lead-ac. Integral charge. lead Recommended battery chargers (optional) 6407 6411 6425 6427 6455 Suitable for the following battery types 6463 6464 6466 6468 6470 Multilader 3 Ultramat 8 Twin Charger Multilader 3 Multilader 7E Ultramat 12 plus Pocket Ultramat 14 plus Ultra Trio plus 14 Ultramat 16S Ultramat 18 Specification, mx-12 HoTT transmitter Specification, GR-12 HoTT receiver Frequency band 2,4 … 2,4835 GHz Operating voltage 3,6 … 8,4 V Modulation FHSS Current drain ca. 70 mA Transmitter power see country setting, page 115 Frequency band 2,4 … 2,4835 GHz Control functions Six functions; four with trims Modulation FHSS Temperature range -10 … +55 °C Aerial Aerial folding Operating voltage 3,4 … 6 V approx. 145 mm long, approx. 115 mm encapsulated and approx. 30 mm active Current drain approx. 180 mA Servo sockets Dimensions approx. 190 x 195 x 90 mm Sensor socket 1 (instead of servo 5) Weight approx. 770 g with transmitter battery Temperature range approx. -15° … +70 °C Dimensions approx. 36 x 21 x 10 mm Weight approx. 7 g To recharge the mx-16iFS system you will also need the transmitter charge lead, Order No. 3022, and the receiver battery charge lead, Order No. 3021, unless stated otherwise in the table. For details of additional battery chargers, and details of the chargers listed here, please refer to the main Graupner FS catalogue, or our Internet site at www.graupner.de. Accessories Order No. Description 1121 Neckstrap, 20 mm wide 70 Neckstrap, 30 mm wide 3097 Wind-shield for hand-held transmitter Trainer leads for mx-12 HoTT: see page 137 Replacement parts Order No. Description 2498.4FBEC 4NH-2000 RX RTU, flat-pack 33800 HoTT transmitter aerial Description of radio control set 33112_mx12_HoTT_2_GB.indd Abs4:13 13 06.06.2011 19:39:26 Operating Notes Transmitter power supply The mx-12 HoTT transmitter is fitted as standard with a high-capacity rechargeable 4NH-2000 RX RTU Ni-MH battery (Order No. 2498.4FBEC) (specification reserved). When delivered, the standard rechargeable battery is not charged. When you are using the transmitter you can monitor the battery voltage on the LCD screen. If the voltage of the transmitter battery falls below a certain point, you will hear an audible warning signal. The screen then displays a message reminding you that the transmitter battery needs to be recharged. 0:00 GRAUBELE stop #01 0:00 batter y Flug needs «normal » charging!! 4.7V 10% K78 HoTT Mx 0.0V 0:22h Always recharge the transmitter battery in good time. When you see this message, cease operations immediately and recharge the transmitter battery. Charging the transmitter battery The rechargeable Ni-MH transmitter battery can be recharged with the battery charger (Order No. 33116.2) supplied in the set, using the charge socket located on the right-hand side of the transmitter. Leave the battery inside the transmitter for charging, to avoid premature damage to the internal battery socket. As an approximate guideline a discharged battery should be charged for twelve hours at a current corresponding to one tenth of the capacity printed on the pack. If you are using the standard transmitter battery and the charger supplied in the set, this current is 14 200 mA. The transmitter must be switched “OFF” for the whole period of the charge process. Never switch on the transmitter when it is still connected to the charger; even a very brief interruption in the process can cause the charge voltage to rise to the point where the transmitter is immediately damaged. For this reason check carefully that all connectors are secure, and are making really good contact. Polarity of the mx-12 HoTT charge socket Commercially available battery charge leads produced by other manufacturers are often made up with the opposite polarity. For this reason it is essential to use only the genuine Graupner charge lead, Order No. 3022. Using automatic battery chargers Although the standard transmitter charge socket is protected against reversed polarity, it is still possible to use suitable chargers to fast-charge the transmitter battery. If possible, set the delta peak voltage difference of your fast charger to a value in the range 10 mV … 20 mV or equivalent, as described in the charger’s instructions; this ensures that it is suitable for fast-charging Ni-MH cells. First connect the banana plugs on the charge lead to the charger, and only then connect the other end of the charge lead to the charge socket on the transmitter. When the charge lead is connected to the transmitter, never allow the bare ends of the plugs to touch! To avoid damage to the transmitter, the charge current must never exceed 1 A. If necessary, limit the current on the charger itself. Removing the transmitter battery To remove the transmitter battery, first disengage the cover over the battery compartment on the back of the transmitter, then lift it off: Remove the battery, then carefully pull on the power lead to disconnect the transmitter battery connector. Installing the transmitter battery Hold the connector attached to the transmitter battery in such a way that the black or brown wire faces the aerial, and the unused socket of the battery connector is on the side facing the bottom, then push the battery connector onto the three pins projecting out of the inside of the transmitter, in the direction of the circuit board. (The battery connector is protected against reversed polarity by two chamfered edges; see illustration). Polarity of transmitter battery Finally place the battery in the comconnector partment, and close the cover. Operating Notes 33112_mx12_HoTT_2_GB.indd Abs5:14 06.06.2011 19:39:26 Battery timer, bottom left corner of the screen This timer displays the cumulative operating time of the transmitter since the last time the transmitter battery was charged. This timer is automatically reset to “0:00” when the transmitter detects that the voltage of the transmitter battery is significantly higher than the last time it was switched on, e. g. as a result of a charge process. GRAUBELE #01 6.1V 99% 0:00h 0:00 stop flt 0:00 «normal » K78 HoTT 0.0V Mx Operating Notes 33112_mx12_HoTT_2_GB.indd Abs5:15 15 06.06.2011 19:39:26 Operating Notes Receiver power supply A wide range of rechargeable four-cell and five-cell NiMH batteries varying in capacity is available for use as the receiver power supply. If you are using digital servos we recommend that you use a five-cell (6 V) pack of generous capacity. If your model is fitted with a mixture of digital and analogue servos, it is important to check the maximum permissible operating voltage of all the types. The PRX unit, Order No. 4136, provides a stabilised receiver power supply with a user-variable voltage from one or two receiver batteries; see Appendix. For reasons of safety battery boxes or dry cells should never be used. The voltage of the airborne power supply is displayed on the transmitter screen while the model is flying: GRAUBELE #01 5.2V 51% 2:22h 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V If the voltage falls below the pre-set warning threshold 3.8 Volt as standard, but variable in the Telemetry menu; see page 126 - a visual and audible low-voltage warning is triggered. Nevertheless it is important to check the state of the batteries at regular intervals. Don’t put off charging the batteries until the warning signal is triggered. Note: Please refer to the main Graupner FS catalogue or visit the Internet site at www.graupner.de for full details of batteries, chargers, measuring equipment and battery monitor units. 16 Charging the receiver battery The charge lead, Order No. 3021, can be connected directly to the NC receiver battery for charging. If the battery is installed in a model and you have installed one of the following switch harnesses: Order No. 3046, 3934 or 3934.1 or 3934.3, the battery can be charged via the separate charge socket, or the charge socket which is built into the switch. The switch on the switch harness must be left at the “OFF” position for charging. Polarity of the receiver battery connector General notes on battery charging • Observe the recommendations provided by the charger manufacturer and the battery manufacturer at all times. • Keep to the maximum permissible charge current stated by the battery manufacturer. • The maximum charge current for the transmitter battery is 1.5 A. Limit the charge current to this value on the charger. • If you wish to charge the transmitter battery at a current higher than 1.5 A, you must first remove the pack from the transmitter, otherwise you risk damaging the circuit board through overloading the conductor tracks, and / or overheating the battery. • Carry out a series of test charges to ensure that the automatic charge termination circuit works correctly with your battery. This applies in particular if you wish to charge the standard Ni-MH battery using an automatic charger designed for Ni-Cd batteries. • You may need to adjust the Delta Peak trigger voltage, if your charger provides this option. • Do not discharge the battery or carry out a battery maintenance program via the integral charge socket. The charge socket is not suitable for this application. • Always connect the charge lead to the charger first, and only then to the transmitter or receiver battery. Observing this rule eliminates the danger of accidental short-circuits between the bare contacts of the charge lead plugs. • If the battery becomes hot when on charge, it is time to check the pack’s condition. Replace it if necessary, or reduce the charge current. • Never leave batteries unsupervised when on charge. Environmental protection notes Important information on the disposal of dry and rechargeable batteries: The German Battery Order places a legal requirement on every consumer to return all used and exhausted dry cells and rechargeable batteries. It is prohibited to dispose of these items in the ordinary domestic waste. At no charge to the user, old dry and rechargeable batteries can be surrendered at local authority collection points, Graupner retail outlets, and any other shop where dry and rechargeable batteries of the same type are sold. You can also send batteries supplied by us to the following address - with adequate pre-paid postage - for disposal: Graupner GmbH & Co. KG Service: Gebrauchte Batterien (Used batteries) Henriettenstr. 94 - 96 D-73230 Kirchheim unter Teck You can make an important contribution to environmental protection in this way. Operating Notes 33112_mx12_HoTT_2_GB.indd Abs5:16 06.06.2011 19:39:26 Adjusting stick length Both sticks are infinitely variable in length over a broad range, enabling you to set them to suit your personal preference. Hold the bottom half of the knurled grip firmly, and unscrew the top section: Now screw the stick top in or out (shorter or longer) to the length you prefer before tightening the top and bottom sections against each other to fix the stick top. Opening the transmitter case Please read the following notes carefully before you open the transmitter. If you have no experience in such matters, we recommend that you ask your nearest Graupner Service Centre to carry out the work for you. The transmitter should only be opened in the following cases: • When a self-neutralising stick needs to be converted to non-neutralising action, or a non-neutralising stick to a self-neutralising action. • If you wish to adjust the stick centring spring tension. Before opening the transmitter check that it is switched off (move Power switch to “OFF”). Open the battery compartment and remove the transmitter battery as described on the previous double page, together with any micro-SD card already installed. After this, use a PH1-size cross-point screwdriver to undo the six screws recessed into the back panel of the transmitter, as shown in the illustration: Arrangement of the case back screws Hold the two case sections together with your hand, and turn the unit over to allow these six screws to fall out onto the table. Now carefully raise the case back and fold it open to the right, as if you were opening a book. C A UT I O N Two multi-core cables connect the lower shell to the transmitter electronics located in the top section. Please take great care not to damage this cable! Important: • Do not modify the transmitter circuit in any way, as this invalidates your guarantee and official approval for the system. • Do not touch any part of the circuit boards with any metal object. Avoid touching the contacts with your fingers. • Never switch the transmitter on while the case is open. Please note the following points when closing the transmitter: • Make sure that no cables are jammed between the transmitter case sections when you close the back. • Check that the two case sections fit together flush all round before fitting the retaining screws. Never force the two case components together. • Fit the case screws in the existing threads, and tighten them gently. Over-tightening them will strip the threads in the plastic. • Remember to re-connect the battery. Operating Notes 33112_mx12_HoTT_2_GB.indd Abs5:17 17 06.06.2011 19:39:27 Operating Notes Converting the dual-axis stick units Self-centring action Either or both sticks can be converted from self-neutralising to non self-neutralising action: start by opening the transmitter as described on the previous page. If you wish to change the standard stick unit arrangement, start by locating the screw on the left-hand stick unit shown circled in white in the photo below. Folding aerial Adjuster screws for stick centring force Self-centring screw Note: The right-hand stick unit is of mirror-image construction, i. e. the screw you require is located on the right, below centre. Do not touch transmitter circuit board Self-centring screw Brake springs Brake springs Adjuster screws Adjuster screws Right-hand stick unit Charge socket Left-hand stick unit Turn this screw clockwise until the stick on that side moves freely from one end-stop to the other; alternatively unscrew it until the stick is fully self-centring again. Do not touch transmitter circuit board Memory card slot 18 Operating Notes 33112_mx12_HoTT_2_GB.indd Abs5:18 06.06.2011 19:39:28 Brake spring and ratchet You can alter the braking force of the stick by adjusting the outer of the two screws circled in white in the next picture; adjusting the inner screw alters the strength of the ratchet: Stick centring force The centring force of the sticks is also variable to suit your preference. The adjustment system is located adjacent to the centring springs; see the white circles in the following photo. You can set the preferred centring spring force by rotating the corresponding adjuster screw using a cross-point screwdriver: • Turn to the right = harder spring tension; • Turn to the left = softer spring tension. vertical Note: The right-hand stick unit is of mirror-image construction, i. e. the screw you require is located on the right, below centre. horizontal Note: The right-hand stick unit is of mirror-image construction, i. e. the screw you require is located on the right, below centre. Operating Notes 33112_mx12_HoTT_2_GB.indd Abs5:19 19 06.06.2011 19:39:29 Description of transmitter Transmitter controls Attaching the transmitter neckstrap You will find a strap lug mounted in the centre of the front face of the mx-12 HoTT transmitter, as shown in the drawing on the right. This lug is positioned in such a way that the transmitter is perfectly balanced even when suspended from a neckstrap. Order No. 1121 Neckstrap, 20 mm wide Order No. 70 Neckstrap, 30 mm wide Central Status LED Aerial with folding / rotating base Neckstrap lug Rotary proportional control CTRL 8 Rotary proportional control CTRL 7 Carry handle 3-position switch SW 4/5 2-position momentary switch SW 1 3-possition switch SW 6/7 2-position switch SW 3 Left-hand stick Right-hand stick Trim Important note: In the transmitter’s standard form any servos connected to the receiver can initially only be operated using the dual-axis sticks. For maximum flexibility, all the other transmitter controls (CTRL 7 … 8, SW 1, 3 … 7) are “free” in software terms, and can be assigned to any channels you like, enabling you to set up the system to suit your personal preference or the requirements of a particular model. This is carried out in the “contr set.” menu, as described on pages 74 (fixed-wing models) and 76 (model helicopters). 20 Description of transmitter 33112_mx12_HoTT_2_GB.indd Abs6:20 Trim ON / OFF switch Right-hand four-way button Left-hand four-way button LCD screen 06.06.2011 19:39:31 Case screw Case screw Option well for speech output module Order No. 33001.71 Data socket for connecting Smart-Box, Order No. 33700 DSC socket for connecting flight simulators and for Teacher mode Three-pin socket for connecting transmitter to a PC Case screw Case screw Transmitter battery charge socket Battery compartment cover Case screw Case screw Optional headphone socket If you install the optional speech output module, Order No. 33001.71, and replace the name plate, it is possible to connect a standard commercial earphone or headphones fitted with a 3.5 mm barrel plug (not included in the set) to the central socket. Signals and voice messages associated with the Telemetry menu are generated via this optional socket, as are the transmitter’s audible signals. As standard these messages are spoken in the German language. For more details please see the section entitled “Voice” in the section “SECRET MODE” starting on page 26, and “Telemetry” on page 131. The volume of the headphone output can be adjusted in the “Voice volume” line of the “Basic Settings” menu; see page 115. Three-pin “PC” socket This socket can be used to connect the transmitter to a PC running Windows XP, Vista or 7 using the optional USB adapter, Order No. 7168.6 and the connecting lead, Order No. 6466.S. The software required at the PC, including a suitable USB driver, can be found in the Download section for the corresponding product at www.graupner.de. Once you have installed the software required, you can also update the transmitter via this connection. Data socket For connecting the optional Smart-Box, Order No. 33700. For more details about the Smart-Box please refer to the main Graupner FS catalogue, or refer to that product on the Internet at www.graupner.de. Description of transmitter 33112_mx12_HoTT_2_GB.indd Abs6:21 21 06.06.2011 19:39:31 DSC Data storage Direct Servo Control Card slot The original function of this socket was for “Direct Servo Control”, and that’s why the abbreviation is still in use. However, for technical reasons “direct servo control” is no longer possible with the HoTT system using a diagnosis lead. The mx-12 HoTT transmitter’s standard two-pole DSC socket is now used as a Trainer (buddy box) socket (Teacher or Pupil), and as an interface for flight simulators. For the DSC connection to work you must check the following: 1. Carry out any adjustments required in the appropriate menus: See page 134 for information on setting up the mx12 HoTT transmitter to work as part of a Trainer system. 2. ALWAYS leave the transmitter’s On / Off switch in the “OFF” position when using a flight simulator, and when using the mx-12 HoTT transmitter as a Pupil unit in a Trainer system, for only in this position is the RF section of the transmitter module switched off (no RF signal) even when the DSC lead is plugged in. At the same time the transmitter’s current drain is reduced slightly. The central Status LED should now glow a constant red, and the abbreviation “DSC” appears in the transmitter’s base display on the left, below the model number. At the same time the display of telemetry symbols is suppressed: 22 PUPIL #11 DSC 6.0V 99% 0:01h stop 0:00 flt 0:00 «normal » HoTT 0.0V The transmitter is now ready for use. In contrast, when the mx-12 HoTT is used in Teacher mode, the transmitter must be switched on before the appropriate cable is plugged in. 3. Connect the other end of the connecting lead to the appropriate apparatus, taking into account the operating instructions supplied with that device. Important: Ensure that all connectors are firmly seated in their sockets. Note regarding flight simulators: The range of flight simulators available commercially is now very wide, and you may find that it is necessary to swap over certain contacts at the barrel connector or the DSC module. This work must be carried out by a Graupner Service Centre. micro-SD and micro-SDHC When you switch off the mx-12 HoTT transmitter and remove the battery compartment cover, you will see the card slot for memory cards (of the micro-SD and microSDHC type) in the right-hand side of the compartment: Any standard commercial micro-SD memory card with a capacity of up to 2 GB can be used, and also any microSDHC card of up to 32 GB. However, the manufacturer recommends the use of memory cards with capacities up to only 4 GB, as these are completely adequate in all normal circumstances. The memory cards for which the transmitter is intended are familiar from their use in digital cameras and mobile telephones. Place the card in the slot with the contacts facing up, towards the back panel, and push it in until it locks. Re-install the battery and close the battery compartment; the transmitter can now be switched on again. The base display shows a stylised memory card symbol to indicate that a memory card is present: Description of transmitter 33112_mx12_HoTT_2_GB.indd Abs6:22 06.06.2011 19:39:32 GRAUBELE #01 5.2V 50% 3:33h 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V Note: If there is an SD card installed, withdraw it BEFORE you remove the transmitter’s back panel, otherwise there is a risk that you will damage the card. Data recording / storage The process of saving data on the SD card is coupled to the flight timer: if the timer is started, then data saving commences - provided that a suitable memory card is in the card slot, and a telemetry connection to the receiver exists - and ceases again when the flight timer is stopped. The flight timer is started and stopped as described in the “Timers” section on page 59 for fixed-wing models, and pages 67 and 68 for model helicopters. When data is being recorded, the card symbol flashes constantly and slowly. When data is being written to the memory card, the memory card symbol swells from left to right to indicate the process. When a data storage process is concluded, you will find an (empty) “Models” folder and a “Log-Data” folder on the memory card. The latter contains the log files, stored in sub-folders named “Model name”, using the format 0001.bin, 0002.bin etc. However, if a model memory has not yet been named, then you will find the associated log files in a sub-folder named “NoName” when you remove the memory card from the transmitter and insert it in the card slot of a PC or laptop. If you wish, the standard - fixed - date of creation can be changed on the PC using a suitable program, and the data can subsequently be analysed on a compatible PC using the PC program available on the Download page for the transmitter at www.graupner.de. Importing voice files As mentioned in the section entitled “Optional headphone socket” on page 21, signals and messages associated with the Telemetry menu can be generated via the optional speech output module, Order No. 33001.71, in addition to the transmitter’s audible signals. As standard these telemetry messages are spoken in the German language. The messages are grouped together to form a language pack and stored in the transmitter’s internal memory, but this can be replaced at any time by a language pack in a different language. For more details on this please refer to the section entitled “HIDDEN MODE” starting on page 26. Importing and exporting model memories Any model memories can be copied onto a memory card in the transmitter, or copied from the card into the transmitter, so that you can exchange data between identical transmitters, and also back up your data. For more information please see the “Model memories” section starting on page 52. Note: Some of the special characters used in certain model names cannot be accepted due to specific limitations of the FAT or FAT32 file system used by memory cards. During the copy process they are replaced by a tilde (~) character. Description of transmitter 33112_mx12_HoTT_2_GB.indd Abs6:23 23 06.06.2011 19:39:33 Screen and keypad Visual display of the trim lever positions; alternatively - if rotary controls CTRL 7 or 8 are operated - display of the current settings of these two controls Model name Model type display (fixed-wing / helicopter) See page 28 for possible warnings Stopwatch in min:sec (count-up / count-down) Model memory 1 … 10 Left-hand four-way button ef cd leaf through ef pressed briefly together: switches to Servo display menu Right-hand four-way button ef cd leaf through / alter values SET Select / Confirm ESC = interrupt / back ESC pressed for about one second; Switches to the Telemetry menu, and back to the base display Simultaneous brief press of ef or cd = CLEAR Battery voltage and charge state in % (If voltage falls below a particular level, a warning display appears - see pictures on right-hand page; at the same time a warning signal is emitted.) Battery operating time since last battery charge, in hr:min 24 Flight timer in min:sec (count-up / count-down) Receiver power supply voltage Flight phase name Switching between flight phases using switch Signal strength indicator Description of transmitter - screen and keypad 33112_mx12_HoTT_2_GB.indd Abs7:24 06.06.2011 19:39:33 Operating the “Data Terminal” Input buttons ESC, SET, CLEAR, symbols On-screen telemetry symbols The active model memory is not yet “bound” Not flashing: RF switched off at transmitter Flashing aerial symbol: The last receiver bound to the active model is inactive, or out of range >M x No telemetry signal detected Signal strength display >M Display of Pupil signal strength on the Teacher >P transmitter’s screen. Buttons to the left of the screen • ESC button Pressing the ESC button returns you step by step within the function select system, taking you right back to the basic display. If you make a change in the meantime, the change is retained. If pressed for about one seconds in the base display, ESC opens and closes the Telemetry menu. • Arrow buttons ef cd 1. Pressing one of these buttons allows you to leaf through lists, such as the Model Select or MultiFunction list, always moving in the direction of the arrow; the arrow buttons are also used to move through menu lines within menus. 2. Simultaneously pressing the ef buttons switches from the base transmitter display, and from almost any menu position, into the “Servo display” menu. Short-Cuts Buttons to the right of the screen • SET button 1. Starting from the base screen display - as it appears when you switch the transmitter on - a brief press of the SET button takes you to the multifunction menus. You can also call up a selected menu using the SET button. 2. Within the set-up menus you can activate (confirm) and disable the corresponding set-up fields by pressing the SET button. • Arrow buttons ef cd 1. “Leafs through” the multi-function menu and the menu lines within the set-up menus, in the same manner as the left-hand four-way arrow buttons. 2. Selects and adjusts parameters in set-up fields after you have activated them by pressing the SET button; the buttons fc and ed are assigned the same function in each case, i. e. it makes absolutely no difference which of the two buttons you use. 3. A brief simultaneous press of the cd or ef buttons resets an altered parameter value in the active input field to the default value (CLEAR). Notes: If you switch the transmitter off and then immediately on again, you may find that the four-way buttons have no effect. This is not a fault! Switch the transmitter off again, and wait a few seconds before switching it on once more. You can call up particular menus or options directly using the following button combinations: • CLEAR A brief simultaneous press of the cd or ef buttons of the right-hand four-way button resets an altered parameter value in the active input field to the default value. • “Servo display” A brief simultaneous press of the ef buttons of the left-hand four-way button switches from the transmitter’s base display, and from almost any menu position, to the “Servo display”, menu; see page 113. • “Telemetry” Press the central ESC button of the left-hand fourway button for about one second at the transmitter’s base display; see section starting on page 117. • “HIDDEN MODE” (language selection and contrast) Simultaneously press the arrow buttons cd of the left-hand four-way button AND the central SET button of the right-hand four-way button; see next double-page. • Input lock Can be activated and disabled at the transmitter’s basic display by simultaneously holding the ESC and SET buttons pressed in for about two seconds. Description of transmitter - screen and keypad 33112_mx12_HoTT_2_GB.indd Abs7:25 25 06.06.2011 19:39:33 HIDDEN MODE Language selection and screen contrast The “HIDDEN MODE” (VERSTECKTER MODUS) menu of the mx-12 HoTT transmitter can be accessed from virtually any menu position by holding the arrow buttons cd of the left-hand four-way button and the SET button of the right-hand four-way button pressed in; after about one second this display appears: ¿VERSTECKTER MODUS¿ KONTRAST DEUTSCH SPRACHE ANSAGEN DEUTSCH CONTRAST In the “CONTRAST” (KONTRAST) line you can adjust the screen contrast to suit your preference by briefly pressing the central SET button of the right-hand fourway button, as described in full on page 114 / 115. With a second press of the SET or ESC button you return to the line select point. In the … LANGUAGE … (SPRACHE) line below it, which you can access by pressing the arrow button d of the left-hand or righthand four-way button, you can select your preferred language. ¿VERSTECKTER MODUS¿ KONTRAST DEUTSCH SPRACHE ANSAGEN DEUTSCH 26 Activate the value field by pressing the central SET button of the right-hand four-way button: ¿VERSTECKTER MODUS¿ KONTRAST DEUTSCH SPRACHE ANSAGEN DEUTSCH Now replace the default language “DEUTSCH” (German) with your preferred language using the arrow buttons of the right-hand four-way button. For example: ¿ HIDDEN MODE ¿ CONTRAST ENGLISH LANGUAGE VOICE DEUTSCH If you change the language, all the settings stored in the transmitter are retained in full. When this manual went to press, the following two languages were available: • German • English • French The languages Italian and Spanish will be made available later on the Download page of the transmitter at www.graupner.de in the form of an update. VOICE MESSAGES As mentioned in the section entitled “Optional headphone socket” on page 21, signals and messages associated with the Telemetry menu can be generated via the optional speech output module, in addition to the transmitter’s audible signals. As standard these telemetry messages are spoken in the German language. The messages are grouped together to form a language pack and stored in the transmitter’s internal memory, but it can be replaced at any time by a language pack in a different language. When this manual went to press, the following languages were available: • German • English • French The languages Italian and Spanish will be made available later on the Download page of the transmitter at www.graupner.de in the form of additional voice files. The active voice package can be replaced using either the PC program which can be found on the transmitter’s Download page at ww.graupner.de, or using an SD card, as described below. Preparation If you have not already done so, insert your SD or SDHC card in the transmitter, as described on page 22. When you switch the transmitter on, it immediately creates a “VoiceFile” folder on the memory card. Remove the prepared memory card from the transmitter, and insert it in a suitable card reader. Connect this to your PC or laptop, and copy the voice package, typically “voice_gb.vdf”, into this folder; this is the file which you previously downloaded from the transmitter’s Download page. Remove the memory card from the card reader, and insert it in the transmitter once more. Switch the transmitter on with RF switched off: Description of transmitter 33112_mx12_HoTT_2_GB.indd Abs8:26 06.06.2011 19:39:33 RF ON/OFF? ON OFF Changing the language Use the arrow buttons of the left or right-hand four-way button to move to the “VOICE” line: ¿ HIDDEN MODE ¿ CONTRAST ENGLISH LANGUAGE VOICE DEUTSCH Confirm your choice by pressing the central SET button of the right-hand four-way button once more: the selected voice package is now loaded into the transmitter’s memory: ¿ HIDDEN MODE ¿ CONTRAST ENGLISH LANGUAGE VOICE ENGLISH 22/100% The loading process is finished when the progress bar at the bottom edge of the screen disappears: Activate voice output by pressing the central SET button of the right-hand four-way button: ¿ HIDDEN MODE ¿ CONTRAST ENGLISH LANGUAGE VOICE DEUTSCH Now use the arrow buttons of the right-hand four-way button to replace the default language “DEUTSCH” (German) with the language of your choice. For example: ¿ HIDDEN MODE ¿ CONTRAST ENGLISH LANGUAGE VOICE ENGLISH ¿ HIDDEN MODE ¿ CONTRAST ENGLISH LANGUAGE VOICE ENGLISH dure. • If the warning … SD-CARD INSERT OK … appears, then there is no memory card in the card slot, or the card cannot be read. • If the warning … MISSING IMPORT DATA OK … appears, then there is no suitable voice file on the SD card you have inserted. Finally switch the transmitter off to conclude the procedure. All the settings stored in the transmitter are retained in full even after you have switched languages. Notes: • If the warning message … RF MUST BE OFF OK … appears, then the transmitter’s RF section is still active. Switch this section off in the “RF module” line of the “Basic settings” menu, and repeat the proceDescription of transmitter 33112_mx12_HoTT_2_GB.indd Abs8:27 27 06.06.2011 19:39:33 Warnings On-screen function fields Warnings SEL, STO, SYM, ASY, The bottom line of the screen displays function fields which vary according to the menu selected. BIND N/A OK RF ON/OFF? ON OFF batter y needs charging fail safe setup t.b.d MISSING IMPORT DATA OK 28 “Binding not present” No receiver is bound to the currently active model memory. You can move directly to the appropriate option by briefly pressing the SET button. Do you want the RF signal to be “ON” or “OFF? Battery must be charged Operating voltage too low Fail-Safe not yet set up No suitable voice files found on the memory card throttle too high ! The throttle stick (or helicopter limiter) is set too far in the direction of full-throttle RF MUST BE OFF OK Request to switch off the RF section (voice files can only be loaded with the RF section switched off) CAN‘T RECEIVE DATA OK no student signal No bound receiver in range. No connection between Teacher and Pupil transmitters SEL STO SYM ASY SD-CARD INSERT OK No SD or SDHC memory card in the card slot, or card cannot be read. TRAINER Wireless Link ACT INH A “wireless Trainer connection” was used before the transmitter was last switched off; do you wish that connection to be continued (ACT), or switched OFF (INH)? The function fields are activated by pressing the SET button. Function fields • SEL select • STO store (e. g. transmitter control position) • SYM adjust values symmetrically • ASY adjust values asymmetrically • Switch symbol field (assigning switches of all kinds) • Switch to second page (next menu) within a menu Description of transmitter 33112_mx12_HoTT_2_GB.indd Abs8:28 06.06.2011 19:39:34 Position display Input lock Rotary proportional controls CTRL 7 and 8 As soon as you operate one of the two rotary controls CTRL 7 + 8 on the centre console, a small symbol appears to the right of the two vertical position indicators: At the same time the position display of the two central vertical bars switches for the duration of the actuation from the display of the current trim position to the current position of the rotary controls CTRL 7 + 8. As you would expect, the left-hand bar represents the position of the left-hand rotary control CTRL 7, and the right-hand bar reflects the position of CTRL 8 (however, both horizontal bars continue to show the current position of the corresponding transmitter stick trim levers): GRAUBELE #01 5.2V 50% 3:33h stop flt 0:00 0:00 To prevent programming errors, it is possible to lock the four-way buttons, and with them access to all the set-up options, from the base display of the mx-12 HoTT transmitter by pressing the ESC and SET buttons simultaneously for about two seconds. This is indicated by an inverted key symbol at the centre point of the trim bars: GRAUBELE #01 5.2V 50% 3:33h 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V The lock is immediately active, but the control system remains ready for use. Pressing the ESC and SET buttons again for about two seconds disengages the lock: the next time you switch the transmitter on, the lock is also disengaged. K78 HoTT M RX0.0V About two seconds after you cease operating one of the two rotary controls, the screen reverts to a display of the current position of the four trim levers for the two dualaxis stick units. Description of transmitter 33112_mx12_HoTT_2_GB.indd Abs8:29 29 06.06.2011 19:39:34 Using the transmitter for the first time Preliminary notes regarding the mx-12 HoTT transmitter For more information please visit our Internet site at www.graupner.de Preliminary notes Within this period you can switch off the RF signal if required by moving the black field to the right using the c In theory the Graupner HoTT system permits the simulor f arrows of the right-hand four-way button; when you taneous operation of more than 200 models. do this, ON should appear normal, and OFF in inverse However, in practice the mixed operation of different technical systems in the 2.4 GHz ISM band - as required form (black background). by the approval regulations - reduces this number RF ON/OFF? considerably. Generally, however, it will always be posON OFF sible to operate even more models simultaneously on the 2.4 GHz band than on the 35 / 40 MHz frequency You can now switch the RF module off by pressing the bands which we have used to date. However, the actual central SET button of the right-hand four-way button. limiting factor - as it has always been - is likely to remain Until this point the central LED glowed blue, but it now the size of the (air-) space available. The simple fact that changes to red, and at the same time the screen switchno frequency control procedure is necessary - a great es to the transmitter’s base display: convenience in itself - equates to an enormous gain in 0:00 GRAUBELE stop safety, especially at flying sites where groups of pilots #01 flt 0:00 may be distributed over a large area, with nobody in overall control. 5.2V 50% K78 HoTT Battery charged? 0.0V 0:33h When you take receipt of your transmitter, the battery will be in the discharged state, so you must first charge The symbol combination means that the currently it as described on page 14. If you do not do this, the active model memory is already “bound” to a Graupner battery will soon fall below the HoTT receiver, but there is currently no connection with batter y pre-set threshold voltage, and needs this receiver. (In our example we - of course - switched you will see and hear a warncharging off the RF signal!) ing signal to remind you to In contrast, if you switch the transmitter on without recharge it. switching off the RF signal, the central LED glows an Switching the transmitter on intense blue, and the symbolic transmitter mast flashes. When you switch the transmitter on, the following display At the same time the transmitter emits an audible warnappears in the centre of the transmitter screen for about ing until a connection is made with the corresponding two seconds: receiver. Once this connection exists, a field strength indicator appears instead of the “x” at the base of the RF ON/OFF? , and the visual and symbolic aerial, for example ON OFF audible warnings cease. 30 At the right of the same line a display in the same format appears when a telemetry connection is made, showing the strength of the telemetry signal picked up from the receiver (>M ) together with the actual voltage of the receiver power supply. appears, and However, if the symbol combination the central LED glows a constant red, the currently active model memory is not “bound” to any receiver. Low-voltage warning If the transmitter voltage falls below a particular value, a visual and audible low-voltage warning is generated. The default value is 4.7 V, but this can be varied in the “Basic Settings” menu (page 114). Firmware update Firmware updates for the transmitter are carried out at the owner’s discretion using the three-pin PC interface on the back of the transmitter, in conjunction with a PC running Windows XP, Vista or 7. It is essential to check the state of charge of the transmitter battery before any update; recharge it to be on the safe side, and be sure to back up all stored model memories before carrying out the update, so that you can restore the data if necessary. To connect the transmitter to a PC you also require the optional USB adapter, Order No. 7168.6 and the connecting lead, Order No. 6466.S. The latest software and information can be found in the Download section for the corresponding product at www. graupner.de. Note: Once you have registered your transmitter at http:// graupner.de/de/service/produktregistrierung you will automatically be informed of new updates by e-mail as Using the transmitter for the first time 33112_mx12_HoTT_2_GB.indd Abs9:30 06.06.2011 19:39:34 they become available. Important notes: • The transmitter included in the set is prepared at the factory with the correct settings for most European countries (except France). If you wish to operate the RC system in France, you MUST first set the Country setting on the transmitter to “FRANCE” mode; see page 115. IT IS PROHIBITED to use the system IN FRANCE using the Universal / EUROPE mode! • You can operate up to six servos using the mx12 HoTT transmitter and the receiver supplied in the set, which is already bound to the transmitter. However, in the interest of maximum possible flexibility, control channels 5 and 6 are not assigned to transmitter controls by default; this also helps to eliminate the danger of inadvertently using them incorrectly. For the same reason virtually all the mixers are inactive by default. For more details of this please refer to page 74 (fixedwing model) or 76 (helicopter). • The basic procedure for programming a new model memory can be found on page 48, and in the programming examples starting on page 144. • When switching on, binding or setting up the radio control system, please ensure at all times that the transmitter aerial is an adequate distance from the receiver aerials. If the transmitter aerial is too close to the receiver aerials, the receiver will be swamped, and the red LED on the receiver will begin to glow. At the same time the downlink channel will stop working. As a result the field strength bars on the transmitter screen are replaced by “x”, and the receiver battery voltage is displayed as 0.0 V. At the same time the radio control system switches to Fail-Safe mode. If this should happen, simply increase the distance between transmitter and receiver until the displays revert to “normal”. Using the transmitter for the first time 33112_mx12_HoTT_2_GB.indd Abs9:31 31 06.06.2011 19:39:35 Using the receiver for the first time Preliminary notes regarding the GR-12 receiver For more information please visit the Internet at www.graupner.de. Receiving system Temperature warning If the temperature of the receiver falls below a limit value The mx-12 HoTT radio control set includes a GR-12 set on the receiver (the default is -10°C), or exceeds 2.4 GHz bi-directional receiver which is suitable for conthe upper warning threshold, which is also set on the nection to a maximum of six servos. receiver (the default is +70°C), the transmitter generates In order to create a connection to the transmitter, the a warning in the form of steady beeps at intervals of Graupner HoTT receiver must first be “bound” to “its” about one second. model memory in “its” Graupner HoTT transmitter; this procedure is known as “binding”. However, binding is Firmware update only necessary once for each receiver / model memory Firmware updates for the receiver are carried out using combination (see pages 61 or 70), and has already the receiver’s telemetry socket - in the case of the GRbeen carried out at the factory for model memory 1 12 receiver supplied as standard in the set this is servo using the components supplied in the set. You therefore socket 5, which is also marked with a “T” - in conjunction only need to carry out the “binding” process with adwith a PC running Windows XP, Vista or 7. To connect ditional receivers, or if you switch to a different model the receiver to a PC you require the separately available memory. The procedure can also be repeated whenever USB interface, No. 7168.6 and the adapter lead, Order you wish - for instance, if you change the transmitter. No. 7168.6A. The latter - like all other connecting leads For this reason, if you connect the GR-12 HoTT receiver - must always be connected to the GR-12 receiver with supplied in the set to a power supply and switch it on, the brown or black wire facing up. the integral LED briefly lights up green, and then goes The latest software and information can be found in the out again, assuming that “its” transmitter is not in range, Download area for the corresponding product at www. or is switched off. If a connection is made, the LED graupner.de. glows a constant green. Note: Note: Once you have registered your transmitter at http:// If the LED glows a constant green, but the receiver graupner.de/de/service/produktregistrierung you will responds neither to the SET button nor to control comautomatically be informed of new updates by e-mail as mands, then please check the polarity of your receiver they become available. power supply. Servo connections and polarity Receiver voltage display The servo sockets of Graupner HoTT receivers are Once a telemetry connection exists, the actual voltage numbered. The connector system is polarised: look for of the receiver power supply is displayed on the rightthe small chamfers when inserting the connectors, and hand side of the transmitter screen. on no account force the plugs into the sockets. The power supply is through-connected via all the num32 bered sockets. If there is no vacant servo socket, it is also possible to connect the power supply via a Y-lead, Order No. 3936.11, in parallel with a servo. Do not connect the battery to these sockets with reversed polarity, as this is likely to ruin the receiver and any devices connected to it. The function of each individual channel is determined by the transmitter you are using, rather than by the receiver. The throttle servo socket is defined by the radio control system, and may differ according to the make and type. For example, in the case of Graupner radio control systems the throttle function is assigned to channel 1 for fixed-wing models, and channel 6 for helicopters. Servo socket 5: “SERVO” or “SENSOR” The servo socket 5, which is marked with an additional “T” … Servo OR sensor … can be used not only to update the receiver by connecting the adapter lead, Order No. 7168.6A, but also to connect a telemetry sensor. However, to ensure that the receiver correctly detects the device connected to this socket, servo socket 5 MUST be reset from “SERVO” to “SENSOR” and vice versa to suit the device. This is carried out in the “Telemetry” menu on the “RX CURVE” page of the “SETTING & DATA VIEW” sub-menu. See the section starting on page 118 for more details: Using the receiver for the first time 33112_mx12_HoTT_2_GB.indd Abs10:32 06.06.2011 19:39:35 RX CURVE CURVE1 CH 02 TYPE : CURVE2 CH 05 TYPE : CURVE3 CH 04 TYPE : 5CH FUNCTION:SERVO On this menu page locate the “>” symbol at the left-hand edge of the screen, use the d arrow button of the left or right-hand four-way button to move it to the bottom line, and then press the central SET button of the right-hand four-way button: RX CURVE CURVE1 CH 02 TYPE : CURVE2 CH 05 TYPE : CURVE3 CH 04 TYPE : 5CH FUNCTION:SERVO Now select the alternative “SENSOR” setting using one of the two arrow buttons cd of the right-hand four-way button: RX CURVE CURVE1 CH 02 TYPE : CURVE2 CH 05 TYPE : CURVE3 CH 04 TYPE : 5CH FUNCTION:SENSOR A further press of the central SET button of the righthand four-way button concludes your choice. Now press the central ESC button of the left-hand four-way button repeatedly until you return to the transmitter’s base display. Concluding notes: • The much higher servo resolution of the HoTT system results in a substantially more direct response compared with previous technologies. Please take a little time to become accustomed to the finer control characteristics offered by the system! • If you wish to use a speed controller with integral BEC* system in parallel with a separate receiver battery, in most cases (depending on the speed controller) the positive terminal (red wire) must be removed from the three-pin connector, as shown in the diagram. Be sure to read the appropriate notes in the instructions supplied with your speed controller before doing this. Carefully raise the central lug of the connector slightred ly (1), withdraw the red wire (2) and insulate the bare contact with tape to avoid possible short circuits (3). out with an already bound receiver, if the transmitter is switched on, and if the associated model memory is active, then the LED lights up green after a short interval to indicate that your transmitter / receiving system is ready for use once more. Please note the following: Resetting the receiver resets ALL the settings stored in the receiver to the default settings, with the exception of the binding information! If you carry out a reset by mistake, this means that you will have to restore all the receiver settings entered using the Telemetry menu. On the other hand, a deliberate RESET is particularly useful if you wish to “re-house” a receiver in a different model, as it represents an easy method of avoiding the transference of unsuitable settings. Observe the installation notes regarding the receiver, receiver aerial and servos, which you will find on page 34. Reset If you wish to carry out a receiver reset, locate the SET button on the top of the receiver and hold it in while you connect its power supply; release the button again. If the reset is carried out with the transmitter switched off, or if the receiver is not already bound, the receiver LED flashes red slowly after about two or three seconds; at this stage it is immediately possible to initiate a binding process at the transmitter. If the reset is carried Battery Elimination Circuit Using the receiver for the first time 33112_mx12_HoTT_2_GB.indd Abs10:33 33 06.06.2011 19:39:35 Installation Notes Installing the receiver Regardless of which Graupner receiving system you are using, the procedure is always the same: Please note that the receiver aerials must be arranged at least 5 cm away from all large metal parts and leads which are not attached or connected directly to the receiver. This includes steel and carbon fibre components, servos, fuel pumps, cables of all sorts, etc. Ideally the receiver should be installed in an easily accessible position in the model, away from all other installed components. Under no circumstances run servo leads immediately adjacent to the receiver aerials, far less coil them round it! Tests have shown that a vertical (upright) position of a single aerial produces the best results when long approaches are flown with a model. If the receiver features a diversity aerial system (two aerials), the second aerial should be deployed at an angle of 90° to the first. The servo sockets of Graupner receivers are numbered. The power supply is through-connected via all the numbered sockets, and in principle can be connected to any of the servo sockets. It is also possible to connect the power supply via a Y-lead, Order No. 3936.11, in parallel with a servo. The function of each individual channel is determined by the transmitter in use, rather than by the receiver. However, it is possible to alter the channel assignment (mapping) by changing the programming in the Telemetry menu. Nevertheless, we recommend that you carry out this process using the “Receiver output” option; see page 60 or 69. The following section contains notes and helpful ideas on installing radio control components in the model: 1. Wrap the receiver in foam rubber at least 6 mm thick. Fix the foam round the receiver using rubber bands, to protect it from vibration, hard landings and crash damage. 2. All switches must be installed in a position where they will not be affected by exhaust gases or vibration. The switch toggle must be free to move over its full range of travel. 3. Always install servos using the vibration-damping grommets and tubular metal spacers supplied. The rubber grommets provide some degree of protection from mechanical shock and severe vibration. Don’t over-tighten the servo retaining screws, as this will compress the grommets and thereby reduce the vibration protection they afford. The system offers good security and vibration protection for your servos, but only if the servo retaining screws are fitted and tightened properly. The drawing below shows how to install a servo correctly. The brass spacers should be pushed into the rubber grommets from the underside. chanical linkage can obstruct the servo’s movement. The sequence in which the servos are connected to the receiver is dictated by the model type. Please see the socket assignments listed on pages 43 and 47. Be sure to read the additional safety notes on pages 3 … 9. If the receiver is ever switched on when the transmitter is off, the servos may carry out uncontrolled movements. You can avoid this by switching the system on in this order: Always switch the transmitter on first, then the receiver. When switching the system off: Always switch the receiver off first, then the transmitter. When programming the transmitter you must always ensure that any electric motors in the system cannot possibly burst into life accidentally, and that an I.C. engine fitted with an automatic starter cannot start unintentionally. In the interests of safety it is always best to disconnect the flight battery, or cut off the fuel supply. Servo mounting lug Retaining screw Rubber grommet Tubular brass spacer 4. The servo output arms must be free to move over their full arc of travel. Ensure that no parts of the me34 Installation Notes 33112_mx12_HoTT_2_GB.indd Abs54:34 06.06.2011 19:39:35 Receiving system power supply A reliable power supply is one of the basic essentials for reliable model control. Free-moving pushrods, a fullycharged battery, battery connecting leads of adequate cross-section, minimal transfer resistance at the connectors etc. all help to minimise energy consumption, but if you have attended to all this, and the receiver voltage displayed on the transmitter screen still collapses repeatedly, or is generally (too) low, then please note the following: The first point to check is that your batteries are always fully charged at the start of each flying session. Check that contacts and switches are low in resistance. It is a good idea to measure the voltage drop over the installed switch harness under load, as even a new, heavy-duty switch can cause a voltage drop of up to 0.2 Volt. Ageing effects and oxidation of the contacts can increase this several times over. Constant vibration and movement at the contacts also “gnaws away” at the contacts, and tends to produce a creeping increase in transfer resistance. It is also true that even small servos, such as the Graupner/JR DS-281, can draw currents of up to 0.75 Ampere when stalled (mechanically obstructed). Just four servos of this type in a “foamy” can therefore place a load of up to 3 Amps on the airborne power supply ... For this reason you should always choose a receiver battery which constantly delivers an adequate voltage, i. e. which does not collapse under severe load. To “calculate” the necessary battery capacity we recommend as a starting point that you provide 350 mAh for each analogue servo, and at least 500 mAh for each digital servo. For example, a 1400 mAh battery would represent an absolute minimum as the power supply for a receiving system with a total of four analogue servos. When making your calculations, however, please bear the receiver in mind as well, as it draws a current of around 70 mA due to its bi-directional function. Regardless of these considerations, it is generally advisable to connect the power supply to the receiver using two leads. For example, you could use a switch or voltage regulator with two power supply leads running to the receiver. You might install a Y-lead, Order No. 3936.11, between lead and receiver, as shown in the diagram below, if you wish to use one or both of the receiver sockets to connect a servo, speed controller, etc. The dual connection at the switch or voltage regulator not only reduces the risk of a cable fracture, but also ensures a more even energy supply to the servos connected to the receiver. For example, many of these servos respond to the high voltage with a clearly audible “rumble”. It is therefore important to check the specification of the servos you intend to use before you make the decision to use five-cell packs. Four-cell Ni-MH battery packs Traditional four-cell packs are a good choice for powering your Graupner HoTT receiving system, provided that you observe the conditions described above, i. e. you must ensure that the packs have adequate capacity and maintain their voltage well. Two-cell Nanophosphate® (A123) batteries Taking into account the current situation, these new cells are now regarded as the optimum choice for receiver packs. A123 cells can be fast-charged in conjunction with a suitable battery charger, and are protected by a metal case and therefore comparatively robust. It is also true that a much higher number of charge / discharge cycles is attributed to this cell type than, for example, to LiPo cells. The nominal voltage of 6.6 Volt of a twocell Nanophosphate® pack presents no problems to Graupner HoTT receivers, nor to those servos, speed controllers, gyros, etc. which are expressly approved for use at these higher voltages. Please note, however, that virtually all servos, speed controllers, gyros etc. sold in the past, and also most of those currently available, are only approved for use on an operating voltage in the range 4.8 to 6 Volt. If you wish to connect these devices to the receiver, it is essential to use a stabilised regulated power supply, such as the PRX, Order No. 4136; see Appendix. If you neglect this, there is a danger that the connected devices will quickly suffer permanent damage Five-cell NiMH battery packs Five-cell batteries offer a wider margin of safety in terms of voltage compared with four-cell packs. However, please note that not all servos available on the market can tolerate the voltage of a five-cell pack (in the longterm), especially when the battery is freshly charged. Two-cell LiPo battery packs For a given capacity LiPo batteries are a great deal lighter than the battery types described above, but they are more susceptible to mechanical stress and damage due to their lack of a metal case. Moreover LiPo batteries only have a limited ability to be fast-charged, and Auxiliary function Y-lead, Order No. 3936.11 PRX stabilised receiver power supply, Order No. 4136 Installation Notes 33112_mx12_HoTT_2_GB.indd Abs54:35 35 06.06.2011 19:39:35 generally do not survive such a high number of charge / discharge cycles as is claimed for other batteries, such as Nanophosphate® types. The comparatively high nominal voltage of 7.4 Volt of a two-cell LiPo pack presents no problems to Graupner HoTT receivers, nor to those servos, speed controllers, gyros, etc. which are expressly approved for use at these higher voltages. Please note, however, that virtually all servos, speed controllers, gyros etc. sold in the past, and also most of those currently available, are only approved for use on an operating voltage in the range 4.8 to 6 Volt. If you wish to connect these devices to the receiver, it is essential to use a stabilised regulated power supply, such as the PRX, Order No. 4136; see Appendix. If you neglect this, there is a danger that the connected devices will quickly suffer permanent damage. 36 Installation Notes 33112_mx12_HoTT_2_GB.indd Abs54:36 06.06.2011 19:39:35 For your notes 33112_mx12_HoTT_2_GB.indd Abs13:37 37 06.06.2011 19:39:35 Definition of terms Control functions, transmitter controls, function inputs, control channels, mixers, switches, control switches To make it easier for you to understand the mx-12 HoTT manual, the following section contains definitions of many terms which crop up again and again in the remainder of the text. Control function The term “control function” can be thought of as the signal generated for a particular function which needs to be controlled - initially independent of its subsequent progress through the transmitter. In the case of fixedwing model aircraft the control functions include throttle, rudder and aileron, whereas collective pitch, roll and pitch-axis are typical of those used for helicopters. The signal of a control function may be assigned directly, or to several control channels simultaneously via mixers. A typical example of the latter is separate aileron servos, or pairs of roll-axis or pitch-axis servos in a model helicopter. The essential feature of a control function is its influence on the mechanical travel of the corresponding servo. Transmitter control The term “transmitter control” refers to the mechanical elements on the transmitter which are operated directly by the pilot. Their movements in turn generate corresponding movements in the servos, speed controllers etc. at the receiver end. The transmitter controls include the following: • The two dual-axis stick units for the control functions 1 to 4; for both model types (“fixed-wing” and “helicopter”) these four functions can be interchanged in any way you wish using the “Mode” function, e. g. throttle left or right, without having to re-connect the servos. The dual-axis stick function for throttle (or airbrakes) is often referred to as the Ch 1 (Channel 1) control. • The two rotary proportional controls CTRL 7 + 8 38 • The switches SW 4/5 and 6/7, and CTRL 9 and 10 • The switches SW 1 and 3, if they have been assigned to a control channel in the “Transmitter control settings” menu. When a proportional transmitter control is operated, the servo or servos follow the position of the control directly, whereas a switched channel provides just the two or three set servo positions. Function input This is an imaginary point on the signal path, and must not be considered the same as the point on the circuit board where the transmitter control is connected! The two menus “Stick mode” and “Transmitter control settings” affect the course of the signal “after” this point, and it is possible (and likely) that there will be differences between the number of the transmitter control (as stated above) and the number of the subsequent control channel. Control channel There is a point on the signal path where the signal contains all the control information required for a particular servo – this may be directly generated by a transmitter control or indirectly via a mixer – and from this point on we call the signal a “control channel”. This signal is only affected by any adjustments carried out in the “Servo settings” menu before leaving the transmitter via the RF module. Once picked up at the receiver, this signal may be modified by any settings made in the Telemetry menu before finally passing to the corresponding servo in the model. Mixer The transmitter’s software includes a wide range of mixer functions. Their purpose is to enable a control function to affect multiple servos at the branching point of the mixer input, or alternatively to allow several control functions to affect one servo. For more information please refer to the numerous mixer functions as described in the section starting on page 88 of the manual. Switch The standard toggle switch SW 3, the two three-position switches SW 4/5 and 6/7 and the momentary button SW 1 can also be incorporated into the programming of the transmitter controls. However, all these switches are also generally intended for switching program options, e. g. starting and stopping timers, switching mixers on and off, transferring control in Trainer mode etc. Each physical switch function can be assigned to as many functions as you wish. Numerous examples are described in the manual. Transmitter control switch It is often desirable to switch a function on or off automatically at a particular position of another transmitter control, e. g. at a defined position of one of the dual-axis sticks. Typical examples are switching a stopwatch on and off to allow you to record the motor run time, extending spoilers automatically (and many others). The mx12 HoTT software includes a total of two (three - for helicopters) “control switches” of this type. Two transmitter control switches are available for the Ch 1 stick in each model memory, both for fixed-wing model aircraft and helicopters. For helicopters a third is present in the form of the throttle limiter; see the right-hand side and page 67. This manual includes a range of instructive examples which make programming as simple as child’s play. Please refer to the programming examples in the section starting on page 144. Definition of terms 33112_mx12_HoTT_2_GB.indd Abs12:38 06.06.2011 19:39:35 Assigning switches and control switches The basic procedure At many points in the program there is the option of using a switch (SW 1, 3 … 7) or a control switch (G1 … 3; see below) to operate a function, or to switch between settings, such as the DUAL RATE / EXPO function, flight phase programming, mixers and more. The mx-12 HoTT allows you to assign several functions to a single switch. The process of assigning switches is exactly the same in all the relevant menus, and we will explain the basic programming procedure at this point so that you can concentrate on the special features when reading the detailed menu descriptions. A switch symbol appears in the bottom line of the screen at all programming points where switches can be assigned: Move to the appropriate column using the arrow buttons of the left or right four-way button. This is the procedure for assigning a switch: 1. Briefly press the SET button of the right-hand fourway button. The following message appears on the screen: push desired switch into position ON 2. Now simply move the switch you wish to use to the “ON” position, press the push-button, or move the Ch 1 stick from the “OFF” position in the direction of “ON”. Please note: the so-called control switches assigned to this transmitter control (see right) carry out the task of an ON / OFF switch in software; the same applies to the throttle limiter (see page 79) which is available in the “Helicopter” model type. This com- pletes the assignment process. Changing the direction of switching: If the switch turns out to work in the wrong direction, you can correct it as follows: move the switch to the desired OFF position, activate switch assignment once more and assign the switch again, this time with the switch direction you prefer. Erasing a switch: Activate the switch symbol as described under Point 2, then briefly press the button combination cd or ef of the right-hand four-way button (CLEAR) simultaneously. Transmitter control switches Many functions are best controlled automatically by a particular (freely programmable) position of the Ch 1 transmitter stick (or the throttle limiter in the case of helicopters), rather than by a conventional physical switch. Typical applications: • Automatically switching an on-board glowplug energizer on and off according to the throttle position of the Ch 1 stick (“G1” or “G2”). In this case the switch for the plug energizer is controlled by a mixer at the transmitter. • Automatically switching a stopwatch on and off to record the pure “flight time” of a model helicopter; this is accomplished using the “G3” switch of the throttle limiter. • Automatically switching the “AIL ¼ RUD” mixer off when the airbrakes are extended, in order to keep the wings parallel with the ground when landing on a slope face, without the (usually coupled) rudder affecting the model’s heading. • Automatically extending landing flaps with coupled elevator trim adjustment on the landing approach, as soon as the throttle stick is reduced below the set threshold point. • Automatically switching a stopwatch on and off in order to time the run of an electric motor. For both model types the mx-12 HoTT transmitter’s software caters for these purposes with two “control switches” of this type; they can be assigned to the Ch 1 stick: “G1” is switched on at around -80% of full travel, while “G2” is switched on at around +80%. The Helicopter program also includes an extra control switch “G3” on the throttle limiter close to the 100% point; see page 79. All these control switches can be included without restriction in the free programming of the switches, i. e. they can be assigned to a function instead of a physical switch. This means that you are able to assign one of the control switches G1 … G2 (or G1 … G3) instead of a physical switch at any point in the software where switches are assigned. All you have to do is move the Ch 1 stick or the throttle limiter control (by default the rotary proportional control CTRL 7) from the desired “OFF” position in the direction of “ON”. Assigning switches and control switches 33112_mx12_HoTT_2_GB.indd Abs14:39 39 06.06.2011 19:39:35 Digital trims Description of function, and Ch 1 cut-off trim 40 1. Fixed-wing models The Ch 1 trim features a special cut-off trim which is designed for glowplug motors: you initially use the trim lever in the usual way to select a reliable idle setting for the motor. If you now move the Ch 1 trim lever to its end-point in the direction of “motor cut-off”, pushing the lever in a single movement, a marker appears on the screen in the last position. You can now return to the idle setting for starting the motor simply by pushing the stick one click in the direction of “open throttle”. 2. Model helicopters In helicopter mode the Ch 1 trim has another feature in addition to “cut-off trim”, as described under “Fixed-wing models” on the left; this time in conjunction with the “Throttle limit function” (see page 79): while the throttle limit slider is in the bottom half of its travel, i. e. in the “start-up range”, the Ch 1 trim lever acts as idle trim on the throttle limit, and the idle trim is displayed on the screen: Last idle position Current trim position GRAUBELE #01 Last idle position Current trim position stop flt Throttle limit control 0:00 0:00 Ch 1 trim lever GRAUBELE #01 5.2V 50% 3:33h stop flt 0:00 0:00 K78 2.4 M RX0.0V Idle direction Digital trims with visual and audible indicators Both the dual-axis stick units are fitted with digital trim systems. When you give the trim lever a brief push (one “click”), the neutral position of the associated stick channel changes by one increment. If you hold the trim lever in one direction, the trim value changes continuously in the corresponding direction with increasing speed. The degree of trim offset is also “audible”, as the pitch of the tone changes to reflect the setting. When you are flying a model, you can find the trim centre position easily without having to look at the screen: if you over-run the centre setting, the trim stays in the centre position for a moment. The current trim values are automatically stored when you switch from one model memory to another. The digital trims are also stored separately for each flight phase within a model memory, with the exception of the “Ch 1” (Channel 1) trim, which is the throttle / airbrake trim on a fixed-wing model. The Ch 1 trim includes another special function which makes it easy to re-locate the idle throttle setting of a glowplug motor. However, since the trim functions described in these instructions only affect the “Motor off” direction, the trim display on the transmitter’s screen will vary according to your individual set stick mode, i. e. the “forward” or “back” throttle / collective pitch minimum position of the Ch 1 stick, and also according to “left stick” or “right stick” for throttle / collective pitch. The illustrations in these instructions always refer to “Throttle / Collective pitch right” for both model types, and to “Throttle back” for fixed-wing models and “Collective pitch forward” for model helicopters. Trim at motor OFF position The cut-off trim feature is disabled if you enter “none” or “none / inv” in the “Motor at Ch 1” line within the “Basic settings” menu (page 56 / 57). Note: Since this trim function is only effective in the “Motor off” direction, the above illustration will not apply if you change the direction of the Ch 1 stick for throttle minimum from “back” (which is reflected in the illustration above) to “forward” in the “Motor at Ch1” line of the “Basic settings” menu. 5.2V 50% 3:33h K78 2.4 M RX0.0V CTRL 7 Trim at motor OFF position In contrast to a fixed-wing model aircraft, this display is suppressed if the throttle limit control is moved to the “right” half of its travel. GRAUBELE #01 5.2V 50% 3:33h stop flt 0:00 0:00 Throttle limit control K78 M RX0.0V 2.4 CTRL 7 Note regarding helicopters: The Ch 1 trim only affects the throttle servo and not the collective pitch servos; it also works evenly over the full stick travel. Please note that the helicopter throttle servo must be connected to receiver output 6 (see Receiver socket assignment, page 47). Digital trims 33112_mx12_HoTT_2_GB.indd Abs15:40 06.06.2011 19:39:35 For your notes 33112_mx12_HoTT_2_GB.indd Abs44:41 41 06.06.2011 19:39:36 Fixed-wing model aircraft This program provides convenient support for normal model aircraft with up to two aileron servos and two flap servos, V-tail models, flying wings and deltas with two elevon (aileron / elevator) servos and two flap servos. The majority of power models and gliders belong to the “normal” tail type with one servo each for elevator, rudder, ailerons and throttle or electronic speed controller (airbrakes on a glider). There is also the special model type “2 EL Sv” which provides a means of connecting two elevator servos to channels 3 and 6 in parallel. If your model features two separate aileron servos (and also in some cases two flap servos), the aileron travel of both pairs of control surfaces can be set up with differential movement in the “Wing mixers” menu, i. e. the down-travel can be set independently of the up-travel. Finally the program caters for camber-changing flaps, which can be operated by any of the transmitter controls “CTRL 7 … 10”. Alternatively a phase-specific trim is available for flaps, ailerons and elevator in the “Phase trim” menu. If the model features a V-tail instead of a conventional tail, you need to select the tail type “V-tail” in the “Basic settings” menu, as this automatically superimposes the elevator and rudder control functions in such a way that each tail panel can be actuated by a separate servo. For deltas and flying wings it is easy to set up mixed elevons, i. e. the aileron and elevator functions can be carried out via common control surfaces at the trailing edge of the right and left wing. As standard the program contains the appropriate mixer functions for the two servos. Up to three flight phases can be programmed in each of the ten model memories. The digital trim positions are stored separately for each flight phase, with the exception of the Ch 1 trim. The Ch 1 trim provides a simple means of re-locating the correct idle throttle setting. Two timers are available at all times when flying. The screen also displays the transmitter operating time since the battery was last charged. All the transmitter controls (CTRL) and switches (SW) can be assigned to virtually any of the inputs 5 and 6 in the “Transmitter control settings” menu. “Dual Rate” and “Exponential” can be programmed separately for aileron, rudder and elevator, giving two modes of control. Depending on the model type you have selected, the “Wing mixers” menu presents you with up to twelve additional pre-defined mixers and coupling functions which you can simply select and set up when necessary, in addition to three free mixers: 1. Aileron differential (switchable) 2. Flap differential (switchable) 3. Aileron ¼ rudder (switchable) 4. Aileron ¼ flap (switchable) 5. Airbrake ¼ elevator (switchable) 6. Airbrake ¼ flap (switchable) 7. Airbrake ¼ aileron (switchable) 8. Elevator ¼ flap (switchable) 9. Elevator ¼ aileron (switchable) 10. Flap ¼ elevator (switchable) 11. Flap ¼ aileron (switchable) 12. Differential reduction Airbrake-Function 1 Airbrake Ail e r o dde A il left Airbrake Flap Airbrake Elevator r Flap Elevator Flap right left Rudder/Elevator V-Tail F la p E le v ator right Fl a p Ailero n Rudder A ileron F la p A il e r o n F la p E va Ele to le v a tor er Ele v Ru Aileron Flap Ail e r o on Fl a p ato Ai er F la A il e r o n Airbrake Flap Airbrake Elevator Aileron R u dder E le v at or A ileron 42 Fixed-wing model aircraft 33112_mx12_HoTT_2_GB.indd Abs16:42 06.06.2011 19:39:36 Installation notes The servos MUST be connected to the receiver outputs in the following order: Outputs not required are simply left vacant. Please note the following points in particular: • If you are using only one aileron servo, receiver output 5 (right aileron) is left unused; it can also be used for another purpose if you select “1 AIL” in the “Basic settings” menu. • If you are using only one flap servo, receiver output 1 (right flap) MUST be left unused, assuming that you have selected “2 FL” in the “Basic settings” menu. Please also read the information on the following pages. Powered and unpowered fixed-wing model aircraft, with up to two ailerons … … and “normal” tail type Free, or auxiliary function Receiver power supply Telemetry sensor or right aileron Rudder Elevator Ailerons or left aileron Receiver power supply Airbrakes - or throttle servo or speed controller (electric model) … and “V-tail” tail type … with two elevon and two flap / elevator servos Free, or auxiliary function Receiver power supply Telemetry sensor or right aileron Right rudder / elevator Left rudder / elevator Ailerons or left aileron Receiver power supply Airbrakes - or throttle servo or speed controller (electric model) ... and “2 elevator servos” tail type 2nd elevator Receiver power supply Telemetry sensor or right aileron Rudder 1st elevator Ailerons or left aileron Receiver power supply Airbrakes - or throttle servo or speed controller (electric model) Left flap (aileron) / elevator Receiver power supply Right flap (aileron) / elevator Free or rudder Right elevon (aileron / elevator) Left elevon (aileron / elevator) Receiver power supply Airbrakes - or throttle servo or speed controller (electric model) Unpowered model gliders with two aileron and two flap servos … … and “normal” tail type Left flap Receiver power supply Right aileron Rudder Elevator Left aileron Receiver power supply Powered and unpowered delta / flying wing models … Right flap … and “V-tail” tail type … with two elevon servos Free, or auxiliary function Receiver power supply Free or telemetry sensor or aux. function Free or rudder Right elevon (aileron / elevator) Left elevon (aileron / elevator) Receiver power supply Airbrakes - or throttle servo or speed controller (electric model) Left flap Receiver power supply Right aileron Right rudder / elevator Left rudder / elevator Left aileron Receiver power supply Right flap Fixed-wing models: receiver assignment 33112_mx12_HoTT_2_GB.indd Abs17:43 43 06.06.2011 19:39:36 As there are several possible combinations of servo orientation and control surface linkage, you may find that the direction of rotation of one or more servos is incorrect. Use the following table to solve the problem. Model type V-tail Delta, flying wing Servo rotating in wrong direction Remedy Rudder and elevator reversed Reverse servos 3 + 4 in the “servo set.” menu Rudder correct, elevator reversed Swap over servos 3 + 4 at the receiver Elevator correct, rudder reversed Reverse servos 3 + 4 in the “servo set.” menu, AND swap over at the receiver Elevator and ailerons Reverse servos 2 + 3 in reversed the “servo set.” menu Elevator correct, ailerons reversed Reverse servos 2 + 3 in the “servo set.” menu, AND swap over at the receiver Ailerons correct, elevator reversed Swap over servos 2 + 3 at the receiver All menus which are relevant to fixed-wing models are marked with an “aeroplane” symbol in the “Program descriptions”: This means that you can easily skip irrelevant menus when programming a fixed-wing model aircraft. 44 Fixed-wing models: receiver assignment 33112_mx12_HoTT_2_GB.indd Abs17:44 06.06.2011 19:39:36 For your notes 33112_mx12_HoTT_2_GB.indd Abs18:45 45 06.06.2011 19:39:36 Model helicopters The continued development of model helicopters and helicopter components, such as gyros, speed governors, rotor blades etc., has led to the current position where helicopters are capable of sophisticated 3-D aerobatics. In contrast, if you are a beginner to helicopter flying, you need a simple set-up so that you can quickly get started on the initial stages of hovering practice, and then gradually learn to exploit all the options provided by the mx-12 HoTT. The helicopter program of the mx-12 HoTT can cope with all current model helicopters equipped with 1 … 4 servos for collective pitch control, entirely regardless of whether they are powered by a fuel-driven or electric motor. Each model memory can include two flight phases plus auto-rotation, and two flight timers are constantly available. At the same time the screen also displays the period which has elapsed since the last charge process. You can return to the correct idle position for the digital Ch 1 trim simply by pressing a button. “Dual Rate” and “Exponential” are available for roll, pitch-axis and tail rotor; they can be coupled together, programmed and switched on and off, giving two modes of control. All the transmitter controls (CTRL) and switches (SW) can be assigned in almost any way to inputs 5 … 6 in the “Transmitter control settings” menu. In addition to three linear mixers, which can be assigned to any functions and can also be switched on and off, the “Helicopter mixers” menu provides five-point curves for the collective pitch, throttle and tail rotor mixers, variable separately for each flight phase; these provide non-linear mixer characteristics. 1. Collective pitch 2. Ch 1 ¼ throttle 3. Ch 1 ¼ tail rotor Such advanced features are not needed by the beginner, who will initially simply set the hover point to coin- Collective Pitch Curve Channel 1 46 cide with the centre point of the stick arc, and adjust the collective pitch travel as required. Moreover the “Heli mixers” menu offers additional set-up options in the “Gyro” line, plus a “swashplate limiter”. The mixer inputs for collective pitch, roll and pitch-axis can then be adjusted in the “Swashplate mixers” menu. The throttle limit function in the “Transmitter control settings” menu provides an effective means of starting the motor in any flight phase. By default the proportional rotary control CTRL 7 is assigned to this input, and this control function determines the maximum throttle servo position, i. e. the trim lever controls the motor over the idle range. Only when this rotary knob is turned in the direction of full-throttle do the programmed throttle curves take effect. If you have set up the two timers, they also start recording the flight time automatically at this point. See page 79 for more information on this. Channel Tail Rotor Throttle Model helicopters 33112_mx12_HoTT_2_GB.indd Abs19:46 06.06.2011 19:39:36 Note for modellers upgrading from earlier Graupner systems: Compared with the previous receiver channel sequence, servo socket 1 (collective pitch servo) and servo socket 6 (throttle servo) have been interchanged. The servos must be connected to the receiver output sockets in the order shown at bottom right. Outputs not required are simply left vacant. For more information on the different types of swashplate, please refer to the “Basic settings” menu described on page 64 / 65. Installation notes The servos MUST be connected to the receiver outputs in the order shown on this page: Outputs not required are simply left vacant. Please note the additional information on the following pages. … with four swashplate servos Throttle or speed governor Receiver power supply Pitch-axis 2 servo Tail rotor servo (gyro system) Pitch-axis 1 servo Roll 1 servo Receiver power supply Roll 2 servo All menus which are relevant to model helicopters are marked with a “helicopter” symbol in the “Program descriptions”: This means that you can easily skip irrelevant menus when programming a model helicopter. Note: To be able to exploit all the convenience and safety features of the throttle limiter (see section starting on page 79), the speed controller should be connected to receiver output “6”. See page 96 for more details. Receiver assignment for model helicopters … … with one to three swashplate servos Throttle or speed governor Receiver power supply Telemetry sensor or gyro gain Tail rotor servo (gyro system) Pitch-axis 1 servo Roll 1 servo Receiver power supply Collective pitch or roll 2 or pitch-axis 2 servo Model helicopters: receiver assignment 33112_mx12_HoTT_2_GB.indd Abs20:47 47 06.06.2011 19:39:36 Detailed description of programming Reserving a new memory If you have already read through the manual to this point, you will undoubtedly have made your first attempt at programming the system already. Even so, it is important to describe each menu here in detail, to ensure that you have comprehensive instructions for each application you are likely to encounter. In this section we start with setting up a “free” model memory prior to “programming” a new model: GRAUBELE #01 6.1V 99% 0:00h stop flt 0:00 0:00 K78 HoTT 0.0V From the basic display press the central SET button of the right-hand four-way button to move to the “Multifunction list”. (You can return to the basic screen at any time by pressing the central ESC button of the left-hand four-way button.) By default the menu point “Model memory” is displayed inverse (black background) and is therefore active when you first call up the multi-function select menu after switching the transmitter on. If this is not the case, select the “Model memory” menu using the arrow buttons (cd, ef) of the left or right-hand four-way button, then briefly press the central SET button of the right-hand four-way button: mod.mem. ser vo set. D/R expo wing mixer ser vo disp fail-safe 48 base sett. contr set. phase trim free mixer basic sett telemetr y select model clear model copy mod–>mod expor t to SD impor t from SD => => => => => Now press the central SET button of the right-hand fourway button once more to move on to the “select model” sub-menu. 01 02 03 04 05 06 R06 ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ In the transmitter’s default state the first model memory is already initialised with the “Fixed-wing model” model type, and the receiver supplied in the set is “bound” to it. This is indicated by the receiver code displayed at top right of the screen; in the example above this is R06. If, on the other hand, the model memory is “unbound”, you will see “---”. The remainder of the model memories are not yet occupied, and are “unbound”; these are entitled “ÄÄfreeÄÄ”. If you want to set up a fixed-wing model, then you can immediately start the programming procedure after leaving the “select model” sub-menu and the “Model memory” menu by pressing the central ESC button of the left-hand four-way button each time … alternatively you can select one of the free model memories using the left or right-hand four-way button … 01 02 03 04 05 06 R06 ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ... and then briefly press the central SET button of the right-hand four-way button to confirm your choice. After this you are invited to select the basic model type, i. e. either “Fixed-wing” or “Helicopter”: Sel model type ( empty mod mem ) Use the e or f button of the left or right-hand four-way button to select the appropriate basic model type, then press the central SET button of the right-hand fourway button to confirm your choice. Your chosen model memory is now initialised with the selected basic model type, and the screen switches back to the basic display. The model memory is now reserved for that use. However, if you wish to get started with a helicopter, then use the c or d button of the left or right-hand four-way button to select one of the model memories marked as “ÄÄfreeÄÄ”, and confirm your choice with a brief press of the central SET button of the right-hand four-way button. You are now requested to define the basic model type, i. e. either “fixed-wing” or “helicopter”. Use the c or d button of the left or right four-way button to select the corresponding symbol, then again Program description: reserving a new memory 33112_mx12_HoTT_2_GB.indd Abs21:48 06.06.2011 19:39:36 press the central SET button of the right-hand four-way button briefly in confirmation. This initialises the chosen model type for the model memory you have just selected, and you can now start programming your model in this memory. It is now only possible to change this memory to a different model type if you first erase the model memory (“Model memory” menu, page 52). Notes: • If you wish to erase the model memory which is currently active in the basic display, you will have to define one of the two model types “fixed-wing” or “helicopter” immediately after completing the erase procedure. You cannot avoid making this choice by switching the transmitter off. If you wish to remove a model memory which you inadvertently occupied, you can simply erase it from a different model memory. However, if you erase a model memory which is not currently active, after the procedure you will see the memory marked as “ÄÄfreeÄÄ” under Model Select. • After the selected model memory has been initialised with your preferred basic model type, the screen shifts to the newly reserved model memory. At the same time the following warning appears for a few seconds … BIND N/A OK … as an indication that this memory has not yet been bound to a receiver. A brief press of the central SET button of the right-hand four-way button takes you di- rectly to the corresponding option. For more detailed information on binding a receiver please refer to pages 61 and 70. • The warning “BIND. n/v” just described is now followed for a few seconds by this warning … fail safe setup t.b.d … as an indication that no Fail-Safe settings have been entered. For more information on this please refer to page 116. • If the warning … throttle too high ! … appears on the screen, move the throttle stick (or the limiter - by default the rotary knob CTRL 7 - if setting up a helicopter) back to idle. This warning only appears in accordance with the settings you have entered in the “Motor at Ch1” or “Collective pitch min.” section of the “Basic settings” menu, as described on pages 56 and 67. If you are setting up a non-powered fixed-wing model, enter “none” or “none/inv” at this point; this disables the throttle warning message, and makes available the “Brake ¼ NN *“ mixers in the “Wing mixers” menu, which would otherwise be suppressed; you should also do this if you wish to use servo socket 1 for the second flap servo. • If the transmitter’s model memories are already occupied, then a pictogram of the selected model type appears in the appropriate model memory, followed by NN = Nomen Nominandum (name to be stated) a blank line, or the model’s name if a name has already been entered in the “Basic settings” menu (pages 56 and 64), together with an indicator that the memory is bound to a receiver, if appropriate. • If the battery voltage is too low, the software prevents you switching model memories in the interests of safety. In this case the screen displays this message: not possible now voltage too low Basically there are now four different options for assigning the four control functions aileron, elevator, rudder and throttle / airbrakes (fixed-wing model), and roll, pitch-axis, tail rotor and throttle / collective pitch (model helicopter) to the two primary dual-axis sticks. Which of these options is adopted depends on the personal preference of the individual model pilot. This function is set in the “Stick mode” line for the currently active model memory in the “Basic settings” menu (page 56 or 64): mod Name stick mode motor at C1 tail type aile/flap no normal 1aile As mentioned earlier, for maximum flexibility the transmitter controls 5 and 6 are by default not assigned to transmitter controls, and can be assigned to any channels you like; this also helps to avoid accidental mishandling. This means that in the default state of the equipment only those servos connected to receiver outputs 1 … 4 can usually be controlled by the two dual-axis Program description: reserving a new memory 33112_mx12_HoTT_2_GB.indd Abs21:49 49 06.06.2011 19:39:36 sticks, whereas servos connected to sockets 5 and 6 remain steadfastly at their centre position. If you set up a new model helicopter, servo 6 may also respond to some extent to the controls - depending on the position of the throttle limiter CTRL 7. For both model types this situation only changes once you have carried out the appropriate assignments in the “Transmitter control settings” menu. If you wish to use a newly initialised model memory, then this MUST first be “bound” to a (further) receiver before any servos connected to the receiver can be controlled from the transmitter. For more information on this please refer to the “Binding” section on pages 61 and 70. You will find a description of the basic steps for programming a fixed-wing model aircraft in the Programming Examples section starting on page 144; for model helicopters the equivalent section starts on page 166. The following menu descriptions are arranged in the order that they are listed in the individual menus in the multi-function list. 50 Program description: reserving a new memory 33112_mx12_HoTT_2_GB.indd Abs21:50 06.06.2011 19:39:37 For your notes 33112_mx12_HoTT_2_GB.indd Abs22:51 51 06.06.2011 19:39:37 Model memories Calling up a model, erasing a model, copying model ¼ model The section on pages 24 and 25 explains the basic method of using the buttons, while the previous two double-pages explains how to move to the Multi-function list and reserve a new model memory. At this point we wish to start with the “normal” description of the individual menu points in the sequence in which they occur on the transmitter itself. For this reason we start with the menu … select model Model memory If you now briefly press the SET button again, you move to the “Call up model” sub-menu: mod.mem. ser vo set. D/R expo wing mixer ser vo disp fail-safe base sett. contr set. phase trim free mixer basic sett telemetr y The transmitter can store up to ten complete sets of model data, including the digital trim values set by the four trim levers. The trims are automatically stored, which means that the settings you have carefully established through test-flying are never lost when you swap models. A pictogram of the selected model type, and - if you have entered a model name in the “Basic settings” menu (pages 56 and 64) - the name appears in all three sub-menus of the “Model memory” menu following the model number. If necessary, use the arrow buttons of the left or righthand four-way button to select the “Model memory” menu, then briefly press the SET button of the righthand four-way button: clear model select model clear model copy mod–>mod expor t to SD impor t from SD 01 02 03 04 05 06 GRAUBELE ULTIMATE STARLET BELL47G ¿¿free¿¿ ¿¿free¿¿ R06 R06 R06 ––– Now use the arrow buttons cd of the left or right-hand four-way button to select from the list the model memory you wish to use, and confirm your selection by pressing the SET button. Pressing ESC takes you back to the previous menu page without switching models. Notes: • If the warning message “Throttle too high” appears when you switch models, the throttle or collective pitch stick (Ch 1), or the throttle limiter, is positioned too far towards full-throttle. • If the battery voltage is too low, it may not be possible to switch model memories for safety reasons. In this case the screen displays the following message: not possible now voltage too low 52 => => => => => select model clear model copy mod–>mod Modellt to senden expor SD Modellt from empfangen impor SD => => => => => Use the arrow buttons cd of the left or right-hand fourway button to select the “clear model” sub-menu, then press the SET button. Select the model to be erased using the arrow buttons cd of the left or right-hand four-way button, … model 01 02 03 04 05 to be cleared: R06 GRAUBELE R06 ULTIMATE R06 STARLET ––– BELL47G ¿¿frei ¿¿ … then press the SET button again; the program responds with the security query: model GRAUBELE 01 to be erased ? NO YES If you answer NO, the process is interrupted, and you are returned to the previous screen page. If you answer YES with the f button of the left or right-hand four-way button and confirm your choice with the SET button, then the selected model memory is erased. Program description: model memories 33112_mx12_HoTT_2_GB.indd Abs23:52 06.06.2011 19:39:37 Caution: The erasure process is irrevocable. All data in the selected model memory is reset to the factory default settings. Note: If you wish to erase the currently active model memory in the basic display, you will be required to define the model type “Helicopter” or “Fixed-wing” immediately. However, if you erase a non-active model memory, then the message “ÄÄfreeÄÄ” appears in the Model select menu. copy model ¼ model Use the arrow buttons cd of the left or right-hand four-way button to select the “copy model ¼ model” sub-menu, then press the SET button. select model clear model copy mod–>mod Modellt to senden expor SD Modellt from empfangen impor SD => => => => => Select the model to be copied using the arrow buttons cd of the left or right-hand four-way button … copy from model: 01 GRAUBELE ULTIMATE 02 03 STARLET 04 BELL47G ¿¿frei ¿¿ 05 R06 R06 R06 ––– … then briefly press the SET button of the right-hand four-way button in the “Copy to model” window. You can now select the target memory using the arrow buttons cd of the left or right-hand four-way button, and confirm your choice with SET. Alternatively you can interrupt the process with ESC. It is possible to overwrite a model memory which already contains model data. copy to model: 01 GRAUBELE ULTIMATE 02 03 STARLET 04 BELL47G ¿¿free ¿¿ 05 R06 R06 R06 ––– When you confirm the selected model memory by pressing the SET button, the security query appears: model 01 ULTIMATE ¿¿free ¿¿ 03 to be copied ? NO YES Selecting NO interrupts the process, and returns you to the previous page. If you select YES with the f button, and confirm your choice by pressing the SET button, then the selected model is copied into the chosen target model memory. Note: When you copy a model memory, the binding data is copied together with the model data, so that a receiving system bound to the original model memory can also be operated with the copy of the memory, i. e. it does not require another binding process. Export to SD Use the arrow buttons cd of the left or right-hand fourway button to select the “Export to SD” sub-menu, then press the SET button. select model clear model copy mod–>mod expor t to SD Modellt from empfangen impor SD => => => => => Use the arrow buttons cd of the left or right-hand fourway button to select the model to be exported: expor t 01 02 03 04 05 to SD-CARD: GRAUBELE ULTIMATE STARLET BELL47G ¿¿frei ¿¿ R06 R06 R06 ––– When you confirm the selected model memory with a brief press of the SET button, the following security query appears: model 01 ULTIMATE SD-CARD expor t ? NO YES You can interrupt the process with NO; if you do this, you are returned to the starting screen. However, if you select YES with the f button, and confirm your choice by pressing the SET button, then the selected model is Program description: model memories 33112_mx12_HoTT_2_GB.indd Abs23:53 53 06.06.2011 19:39:37 copied to the SD card. Notes: • If the warning … SD-CARD INSERT OK • • • • • 54 … appears instead of a model selection, there is no SD card in the card slot; see page 22. When you copy a model memory, the binding data is copied along with the model data, so that the receiving system associated with the original model memory can also be operated using the SAME transmitter and the copied memory without repeating the binding procedure. An exported fixed-wing model is stored on the memory card under \\Models\mx-12 with the format “aModelname.mdl” and a model helicopter with the format “hModelname.mdl”. However, if you export a “nameless” model, then you will find its data stored on the memory card under “a-” and “hNoName.mdl”. Since the mx-12 HoTT does not feature a real-time clock, the model data are stored on the memory card with a fixed creation date. However, if you wish to change the date manually, you can do so on the PC using a suitable program. Some of the special characters used in certain model names cannot be accepted due to specific limitations of the FAT or FAT32 file system used by memory cards. During the copy process they are replaced by a tilde (~) character. If the memory card already contains a model file of the same name, it will be overwritten without warning. Import from SD Use the arrow buttons cd of the left or right-hand fourway button to select the “Import from SD” sub-menu, then briefly press the SET button. select model clear model copy mod–>mod expor t to SD impor t from SD => => => => => Use the arrow buttons cd of the left or right-hand fourway button to select the model to be imported from the SD memory card: impor t from SD-CARD: 00/01/01 ALPINA 00/01/01 EXTRA 00/01/01 COBRA 00/01/01 BELL47G ¿¿frei ¿¿ 05 Notes: • The export date displayed to the right of the model name is shown in the format “Year/Month/Day”. • Since the mx-12 HoTT does not feature a real-time clock, the model data are stored on the memory card with a fixed creation date. However, if you wish to change the date manually, you can do so on the PC using a suitable program. When you do this, and briefly press the SET button of the right-hand four-way button again, an “Import to model:” window is displayed. Use the arrow buttons cd of the left or right-hand four-way button to select the target memory, confirm your choice with SET, or press ESC to interrupt the process. An occupied memory can be overwritten: impor t 01 02 03 04 05 to model : GRAUBELE ULTIMATE STARLET BELL47G ¿¿free ¿¿ E06 E06 E06 ––– When you confirm the selected model memory by pressing the SET button, the following security query is displayed: model 01 03 impor t ? NO ULTIMATE ¿¿free¿¿ YES You can interrupt the process with NO; if you do this, you are returned to the starting screen. However, if you use the f button to select YES, and confirm your choice by pressing the SET button, then the selected model is imported into the selected model memory. Notes: • If the warning … SD-CARD INSERT OK … appears instead of a model selection, there is no SD card in the card slot; see page 22. • When you import a model memory, the binding data Program description: model memories 33112_mx12_HoTT_2_GB.indd Abs23:54 06.06.2011 19:39:37 is copied along with the model data, so that the receiving system associated with the original model memory can also be operated using the SAME transmitter and the copied memory without repeating the binding procedure. Program description: model memories 33112_mx12_HoTT_2_GB.indd Abs23:55 55 06.06.2011 19:39:37 Base settings Basic model-specific settings for fixed-wing model aircraft Before you start programming specific parameters, some basic settings must be entered which apply only to the currently active model memory. Select the “Basic settings” (basic model settings) menu using the arrow buttons of the left or right-hand four-way button, then press the central SET button of the right-hand four-way button: base sett. contr set. phase trim free mixer basic sett telemetr y model name stick mode “MODE 1” (Throttle at right stick) left aileron right aileron idle elev. down idle elev. up “MODE 3” (Throttle at right stick) “MODE 4” (Throttle at left stick) idle left rudder right rudder idle elev. down right aileron right rudder right aileron left aileron full throttle left aileron Motor Vollgas left rudder elev. down elev. up 0123456789 : ; ABCDEFGHIJKLMNO PQRSTUVWXYZ full throttle right rudder elev. up Press the SET button of the right-hand four-way button to move to the next screen page, where you can select characters to assemble the model name. You can enter up to nine characters to define a model name: “MODE 2” (Throttle at left stick) full throttle left rudder elev. down right aileron no normal 1aile left aileron right rudder mod name stick mode motor at C1 tail type aile/flap left rudder mod.mem. ser vo set. D/R expo wing mixer ser vo disp fail-safe to select the desired character, then move to the next position in the name by pressing the arrow button f of the right-hand four-way button, or its central SET button, where you can select the next character. Simultaneously pressing thecd or ef buttons of the right-hand four-way button (CLEAR) inserts a space at that point. You can move to any character position within the input field using the ef buttons of the right-hand four-way button. Pressing the central ESC button of the left-hand fourway button returns you to the previous menu page. The model name entered in this way appears in the basic display, and also in the sub-menus of the “Model memory” menu. mod name GRAUBELE stick mode no motor at C1 tail type normal aile/flap 1aile Press the SET button to highlight the current stick mode (black background). Now use the arrow buttons of the right-hand four-way button to select one of the options 1 to 4. Simultaneously pressing the cd buttons or the ef buttons of the right-hand four-way button (CLEAR) returns the display to stick mode “1”. Pressing the SET button again disables the select field once more, so that you can switch lines. motor at C1 GRAUBELE mod name stick mode no motor at C1 tail type normal aile/flap 1aile elev. up Basically there are four possible ways of arranging the principal control functions of a fixed-wing model on the two dual-axis sticks: the primary functions are aileron, elevator, rudder and throttle (or airbrakes). Which of model name GRAUB these options you select depends on your individual preferences and flying style. Use the arrow buttons of the left-hand four-way button 56 Program description: base settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs24:56 Use the arrow buttons cd of the left or right-hand fourway button to move to the “Stick mode” line. You will see the select field framed: When you select “motor at C1” using the arrow buttons cd of the left or right-hand four-way button, you will see the corresponding input field framed. Press the central SET button of the right-hand four-way button to highlight the current setting. Now use the arrow buttons of the right-hand four-way button to switch between the 06.06.2011 19:39:37 four possible options: “idle fr.”: The idle position of the throttle / airbrake stick (C1) is forward, i. e. away from the pilot. The throttle warning message “Throttle too high”, see page 28, and the – following – option “cut off” are activated. In the “Wing mixer” menu the “Brake ¼ NN *” mixers are disabled. “idle re.”: The idle position of the throttle / airbrake stick (C1) is back, i. e. towards the pilot. The throttle warning message “Throttle too high”, see page 28, and the – following – option “cut off” are activated. In the “Wing mixer” menu the “Brake ¼ NN *” mixers are disabled. “no”: The brake system is “retracted” in the forward position of the throttle / brake stick. In the “Wing mixer” menu the “Brake ¼ NN *” mixers are activated. The throttle warning message “Throttle too high”, see page 28, and the option “cut off” are disabled. „no/inv“ The brake system is “retracted” in the back position of the throttle / brake stick. In the “Wing mixer” menu the “Brake ¼ NN *” mixers are activated. The throttle warning message “Throttle too high”, see page 28, and the option “cut off” are disabled. Notes: • During the programming process it is important to ensure that any internal-combustion engine or NN = Nomen Nominandum (name to be stated) electric motor cannot start running accidentally. The safe option is always to disconnect the fuel supply or the flight battery. • Depending on your choice in this menu, the Ch 1 trim acts “normally” (over the full control travel), or just at the idle end of the range, i. e. only at the “back” or “forward” end of the stick travel. • Please note the Cut-off trim function, which is described on page 40. cut off Note: This menu line is suppressed if you choose “none” or “none/inv” in the “Motor at Ch 1” line. Depending on your selected setting for “Idle forward / rear” in the “motor at C1” line, you can select in this menu line a “Motor OFF” position which can be called up using a switch. The default settings are -100% for the throttle servo position, and +150% for the transmitter control position. GRAUBELE mod name stick mode idle re. motor at C1 cut off –100% +150% ––– tail type normal STO If you wish to change the pre-set value for the “Motor OFF” position of the throttle servo, press the central SET button of the right-hand four-way button. The current setting is highlighted (black background). Now use the arrow buttons of the right-hand four-way button to enter a value at which the motor is reliably “off”, but without stalling the throttle servo. For example, -125%: GRAUBELE mod name stick mode idle re. motor at C1 cut off –125% +150% ––– tail type normal STO The - high - pre-set value in the centre column ensures that the motor can be stopped using the switch (yet to be assigned in the right-hand column) over the full range of travel of the throttle stick. However, if you prefer to set your own individual limit, i. e. the point after which it is possible to switch to the Motor OFF position, move the throttle / collective pitch stick to the desired position, then press the central SET button of the right-hand four-way button: GRAUBELE mod name stick mode idle re. motor at C1 cut off –125% +100% ––– tail type normal STO Note: You can obtain a switching threshold of more than +100% by temporarily increasing the travel of servo 1 to more than 100% in the “Servo settings” menu, then returning it to the original value after storing the switching threshold. In the right-hand column you can now assign a switch which can be used (in an emergency) to cut the motor. We recommend one of the two self-centring momentary buttons SW 1: Program description: base settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs24:57 57 06.06.2011 19:39:37 GRAUBELE mod name stick mode idle re. motor at C1 cut off –125% +100% 1 tail type normal STO tail type GRAUBELE mod name stick mode idle re. motor on C1 cut off –125% +100% 1 tail type normal „Delt/FlW“: „2elev sv“: The mixed elevon (aileron and elevator) control system requires two or four separate servos, one or two in each wing. However, the elevator trim only affects servos 2 + 3, even if you select “2ail2fl” see below. This option is designed for model aircraft with one or two aileron servos and two elevator servos. When the elevator stick is moved, the servo connected to receiver output 6 moves in parallel with servo 3. The elevator trim lever affects both servos. Note regarding “2elev sv”: In this mode a transmitter control which is assigned to input 6 in the “Transmitter control settings” menu is de-coupled from servo “6”; this is for safety reasons. When you select “tail type” using the arrow buttons cd of the left or right-hand four-way button, you will see the corresponding input field framed. Press the central SET Ailerons / Camber-changing flaps button of the right-hand four-way button to highlight the current setting. Now use the arrow buttons of the rightstick mode hand four-way button to select the option which matches idle re. motor at C1 your model: cut off –125% +100% 1 „normal“: This setting caters for all models in which tail type normal each of the functions elevator and rudder aile/flap 1aile is operated by one servo. „V-tail“: The elevator and rudder functions are When you select the “Aileron / Flap” line using the arrow operated by two control surfaces set in a V-shape, each controlled by a separate buttons cd of the left or right-hand four-way button, servo. The two-way coupling function for you will see the corresponding input field framed. Press the rudder and elevator control systems the central SET button of the right-hand four-way butis automatically carried out by the transton to highlight the current setting. Now use the arrow mitter software. If necessary, the ratio buttons of the right-hand four-way button to select one of of rudder travel to elevator travel can be the three options, which are. adjusted in the “Dual Rate” menu (page 82). 58 Program description: base settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs24:58 “1aile” “2aile” “2ail2fl” Both ailerons are actuated by a single servo. Each aileron is actuated by one servo. Each aileron is actuated by a separate servo; there are also one or two camberchanging flap servos. Note: The “2AL 2FL” option is only available with the tail types “normal” and “V-tail”, and only if “none” or “none/inv” has been selected in the “Motor at Ch 1” line. The mixers and associated adjustment facilities which appear in the “Wing mixers” menu (see section starting on page 88) vary according to the data you enter here. The software provides a maximum of twelve ready-made mixers for up to two aileron servos and two camber-changing flap servos. Note: If your model is equipped with only one flap servo, you should still select “2ail2fl”, but leave the “AIL ¼ FL” mixer in the “Wing mixer” menu, which is described on page 91, at 0%. In contrast, all the other wing mixers can be used in the usual way. The second flap socket which is now “vacant” must ON NO ACCOUNT be used for any other purpose! 06.06.2011 19:39:37 timer Two timers are shown in the basic display: one stopwatch and one flight timer: GRAUBELE #01 6.1V 99% 0:00h stop flt 0:00 0:00 K78 HoTT 0.0V You can assign a physical switch or a control switch to these two timers in the right-hand column of the “timer” line, indicated by the switch symbol at the bottom edge of the screen. idle re. motor at C1 cut off –125% +100% 1 tail type normal aile/flap 2aile timer 0:00 ––– The assigned switch starts both timers, and also halts the stopwatch. The method of assigning a physical switch or a control switch is described on page 39. The flight timer, and the saving of telemetry data on a memory card fitted in the card slot (see page 22), always starts simultaneously with the stopwatch, but continues to run even when the stopwatch is halted (switched off). It can only be stopped by pressing the central ESC button of the left-hand four-way button when the stopwatch is already halted. Once the timers are stopped, you can reset both timers to their initial value by simultaneously pressing the cd or ef buttons of the right-hand key (CLEAR). Switching between “count-up” and “count-down” Count-up timer (stopwatch function) If you assign a switch and start the stopwatch with the initial value of “0:00”, the timer runs up until the maximum of 180 minutes and 59 seconds, then re-starts at 0:00. Count-down timer (alarm timer function) You can select a starting time within the range 0 to 180 minutes in the left-hand minutes field, and a starting time within the range 0 to 59 seconds in the right-hand seconds field. Any combination of times can also be selected. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets any settings you have made to “0” or “00”. idle re. motor at C1 cut off –125% +100% 1 tail type normal aile/flap 2aile timer 0:00 Procedure 1. Select the desired input field using the arrow buttons ef of the left or right-hand four-way button. 2. Press SET in the centre of the right-hand four-way button. 3. Select the required time in the highlighted minutes and seconds fields using the arrow buttons of the right-hand four-way button. 4. Press the central SET button to conclude the input process. 5. Once you have switched back to the basic display by pressing the central ESC button of the left-hand four-way button the required number of times, press the cd or ef buttons of the right-hand four-way button (CLEAR) simultaneously, with the stopwatch stopped, to switch the stopwatch to the “Timer” function; see top right in the following illustration: GRAUBELE #01 6.1V 99% 0:00h stop flt 10:01 0:00 K78 HoTT 0.0V When you operate the assigned switch, the stopwatch now starts from the set initial value, counting down (“Timer function”). When the set time has elapsed, the timer does not stop, but continues to run so that you can read off the time elapsed after reaching zero. To make this clear, the over-run time is shown highlighted (black background). Sequence of sounds 30 sec. before zero: triple beep single beep every two seconds 20 sec. before zero: double beep single beep every two seconds 10 sec. before zero: single beep single beep every second 5 sec. before zero: single beep every second at higher rate zero: longer beep; display switches to inverse video Program description: base settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs24:59 59 06.06.2011 19:39:38 The “alarm timer” is reset by simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR), once you have halted the timer. Note: A count-down timer is indicated in the basic display by a flashing colon (:) between the minutes field and the seconds field. Phase 2 and Phase 3 You will automatically be in the “normal” flight phase 1 unless you have already assigned a switch to phases 2 or 3. Both the number and name of this flight phase are fixed permanently as “normal”, and cannot be changed. For this reason the “normal” phase is simply concealed, i. e. it is not displayed as phase 1. tail type aile/flap timer phase 2 phase 3 normal 2aile 10:01 takeoff ––– speed ––– It is also important to understand that the flight phases have their own inherent priorities which need to be observed, particularly when assigning individual switches. The underlying scheme can be described as follows: • If all assigned flight phase switches are closed or open, the “normal” flight phase is active. • If only one switch is closed, then the flight phase assigned to the currently closed switch is active. • If two switches are closed, then the flight phase with the lower phase number is active. 60 For example, this would be phase 2 if the switch assigned to phase 3 is also closed. • As a result you may wish to take the inherent phase priorities into account when assigning names to the flight phases; see below. • At the servo end the transition does not occur “abruptly”, but with a fixed transition period of about one second. Programming When you select “phase 2” or “phase 3” using the arrow buttons cd of the left or right-hand four-way button, the “Name” field for that flight phase is already framed. If the default name does not seem appropriate, press the central SET button of the right-hand four-way button, and the current setting is shown highlighted. Now use the arrow buttons of the right-hand four-way button to select an appropriate name from those available. Press the SET button to conclude the input process. Now press the f button of the left or right-hand fourway button to move to the right-hand column at the bot, tom of the screen, indicated by the switch symbol and briefly press the central SET button. You can now assign a switch to the phase as described on page 39. We recommend one of the two three-position switches SW 4/5 or SW 6/7, in each case starting from the centre toggle position. For more information on flight phase programming please refer to page 86, in the section entitled “Phase trim”. Receiver output For maximum flexibility in terms of receiver socket assignment, the mx-12 HoTT software provides the means to swap over the servo outputs 1 to max. 6; this is carried out on the second page of the “Receiver output” sub-menu. aile/flap timer phase 2 phase 3 receiv out 10:01 takeoff speed 2aile Press the central SET button of the right-hand four-way button to move to the next page of the display. Here you can assign the “control channels” for servos 1 … 6 to any receiver output you wish to use. However, please note that the display in “Servo display” - which you can access from virtually any menu position by simultaneously pressing the e and f buttons of the left-hand four-way button - refers exclusively to the “control channels”, i. e. the outputs are NOT swapped over. output output output output output Use the arrow buttons cd of the left or right-hand fourway button to select the servo / output combination you wish to change, then press the central SET button of the right-hand four-way button. Now you can assign the desired servo (S) to the selected output using the right- Program description: base settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs24:60 06.06.2011 19:39:38 hand arrow buttons, and confirm your choice with SET … or alternatively press the cd or ef buttons of the right-hand four-way button (CLEAR) simultaneously to revert to the default sequence. Please note that any subsequent changes to servo settings, such as servo travel, Dual Rate / Expo, mixers etc., must be carried out according to the original (default) receiver socket sequence. Note: It is also possible to distribute the control functions amongst as many receivers as you wish, using the channel-mapping function in the mx-12 HoTT’s integral Telemetry menu, or even to assign the same control function to multiple receiver outputs. For example, you might wish to actuate each aileron with two servos instead of just one, etc. However, we strongly recommend that you use only one of the two options, as a combination will soon lead to confusion. rx bind Graupner HoTT receivers have to be “instructed” to communicate exclusively with a particular model (i. e. model memory) of a Graupner HoTT transmitter. This process is known as “binding”, and is only necessary once for each new combination of receiver and model. It can be repeated at any time. Important note: When carrying out the binding procedure, please ensure that the transmitter aerial is always an adequate distance from the receiver aerials: keeping the aerials about 1 m apart is safe in this respect. Otherwise you risk a failed connection to the downlink channel, and consequent malfunctions. “Binding” multiple receivers to one model If necessary, it is possible to bind more than one receiver to a single model. This is accomplished by initially binding the receivers individually, as described in the next section. When operating the system, please note that only the receiver which was bound last will establish a telemetry link to the transmitter. For this reason all telemetry sensors installed in the model must be connected to this receiver, since only the last bound receiver is able to transmit their data via the down-link channel. The second, and all other receivers, run in parallel to the receiver last bound to the transmitter, but completely independently of it; they operate in Slave mode with the down-link channel switched off. “Binding” transmitter and receiver Use the arrow buttons cd of the left or right-hand fourway button to move to the “rx bind” line: timer phase 2 phase 3 receiv out rx bind 10:01 takeoff speed screen in the frame of the “rx bind” line, instead of the three “---”: timer phase 2 phase 3 receiv out rx bind ––– If you have not already done so, switch on the power supply to your receiver now: the green LED on the receiver flashes once briefly, then goes out. Press and hold the SET button on the receiver until the green LED starts to flash. Briefly press the central SET button of the right-hand four-way button to initiate the so-called binding process between a receiver and the current model memory. At the same time the word “BINDING” starts flashing on the BINDING If the receiver LED glows a constant green within about ten seconds, then the binding process has been completed successfully; you can now release the receiver’s SET button. Your model / receiver combination is now ready for use. In parallel with this the screen displays the code number for the receiver now “bound” to this model memory. For example: timer phase 2 phase 3 receiv out rx bind 10:01 takeoff speed 10:01 takeoff speed R06 Conversely, if the green LED on the receiver flashes for longer than about ten seconds, then the binding process has failed. In parallel with this the screen will display three “---” once more. If this should occur, alter the relative position of the aerials, and repeat the whole procedure. Program description: base settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs24:61 61 06.06.2011 19:39:38 range test The integral range-check reduces the transmitter’s output power in such a way that you can test the system’s operation at a distance of up to about fifty metres. Carry out the range-check of the Graupner HoTT system in accordance with the following instructions. We recommend that you ask a friend to help with rangechecking. 1. Install the receiver in the model as required, preferably after completing the binding process with the transmitter. 2. Switch the radio control system on and wait until the green LED on the receiver glows. Now you can observe the servo movements. 3. Place the model on a flat surface (paving, close-mown grass or earth), with the receiver aerials at least 15 cm above the ground. This means that you may have to place the model on a raised object for the period of the check. 4. Hold the transmitter at hip-height, and away from your body. However, do not point the aerial straight at the model; instead rotate and / or angle the tip of the aerial so that it is vertical while you carry out the check. 5. If you have not already done so, use the arrow buttons cd of the left or right-hand four-way button to move to the “Test range” line, and initiate range-check mode by pressing the central SET button of the righthand four-way button: 62 phase 2 phase 3 receiv out rx bind range test takeoff speed R06 99sec When you start the range-check, the transmitter’s output power is significantly reduced, and the blue LED on the aerial base starts to flash. At the same time the time display on the transmitter screen starts counting down, and a double beep sounds every five seconds. From five seconds before the end of the range-check you will hear a triple beep every second. When the 99 seconds of the range-check period have elapsed, the transmitter switches back to full power, and the blue LED glows constantly once more. 6. Within this period walk away from the model, moving the sticks all the while. If at any point within a distance of about fifty metres you notice a break in the connection, attempt to reproduce it. 7. If the model is fitted with a motor, switch it on in order to check the system’s interference rejection. 8. Walk further away from the model until you no longer have full control over it. 9. At this point wait until the test period has elapsed, with the model still switched on and ready for use. When the range-check period is over, the model should respond again to control commands. It this is not 100% the case, do not use the system. Contact your nearest Service Centre of Graupner GmbH & Co. KG. 10.Carry out the range-check before every flight, and simulate all the servo movements which are likely to occur in a typical flight. To ensure safe operation of the model, the range must always be at least fifty metres on the ground. Caution: Never initiate a range-check when you are actually operating a model! RF transmit In this menu line you can manually switch the transmitter’s RF transmission on and off again for a specific model for the current period that the transmitter is switched on. For example, you might wish to do this to save power when demonstrating the programming of a model. If you switch the transmitter off with the RF module switched off, next time you switch the transmitter on it will be switched back on again. Use the arrow buttons cd of the left or right-hand fourway button to move to the “RF module” line, and press the central SET button of the right-hand four-way button to activate the value window: phase 3 speed 6 receiv out rx bind R06 range test 99sec RF transmit OFF Now you can use the right-hand arrow buttons to switch between OFF and ON. Press the central SET button of the right-hand four-way button again to conclude the input. Program description: base settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs24:62 06.06.2011 19:39:38 For your notes 33112_mx12_HoTT_2_GB.indd Abs59:63 63 06.06.2011 19:39:38 Base settings Basic model-specific settings for model helicopters roll throttle throttle tail rotor pitch axis pitch axis roll STAR throttle tail rotor Motor/Pitch Use the arrow buttons cd of the left or right-hand fourway button to select the “Stick mode” line; the select field is now framed: STARLET mod name stick mode 1 ser vo swashplate cut off –100% +150% ––– right rotor direct Briefly press the SET button: the current stick mode appears highlighted. Now use the arrow buttons of the right-hand four-way button to choose one of the options 1 to 4. By simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) the display reverts to stick mode “1”. A further brief press on the SET button disables the select field again, so that you can change to a different line. Swashplate type STARLET mod name stick mode 1 ser vo swashplate cut off –100% +150% ––– right rotor direct pitch axis throttle tail rotor roll pitch axis Use the arrow buttons of the left-hand four-way button 64 Program description: base settings - model helicopter 33112_mx12_HoTT_2_GB.indd Abs25:64 throttle pitch axis tail rotor pitch axis throttle “MODE 3” (Throttle at right stick) “MODE 4” (Throttle at left stick) roll model name throttle roll pitch axis roll 0123456789 : ; ABCDEFGHIJKLMNO PQRSTUVWXYZ “MODE 1” (Throttle at right stick) “MODE 2” (Throttle at left stick) tail rotor Press the SET button of the right-hand four-way button to move to the next screen page, where you can select characters to assemble the model name. You can enter up to nine characters to define a model name: Stick mode Basically there are four possible ways of arranging the principal control functions of a model helicopter on the two dual-axis sticks: the primary functions are roll, pitch-axis, tail rotor and throttle / collective pitch. Which of these options you select depends on your individual preferences and flying style: tail rotor mod name stick mode 1 ser vo swashplate cut off –100% +150% ––– right rotor direct roll Model name roll base sett. contr set. heli mixer swashp. mix basic sett telemetr y tail rotor mod.mem. ser vo set. D/R expo free mixer ser vo disp fail-safe to select the desired character. Press one of the arrow buttons ef of the right-hand four-way button, or its central SET button, to move to the next position in the name, at which point you can again select a character. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) inserts a space at that point. You can move to any character position within the input field using the ef buttons of the right-hand four-way button. You can return to the previous menu page by briefly pressing the central ESC button of the left-hand fourway button. The model name entered in this way appears in the basic display, and also in the sub-menus of the “Model memory” menu point. tail rotor Before you start programming specific parameters, some basic settings must be entered which apply only to the currently active model memory. Select the “Basic settings” (Basic model settings) menu using the arrow buttons of the left or right-hand four-way button, and press the central SET button of the right-hand four-way button: pitch axis You will require a particular program variant to suit the number of servos which operate the collective pitch function. Select “Swashplate” with the arrow buttons cd of the left or right-hand four-way button, and the select field 06.06.2011 19:39:38 is framed. Press the SET button: the current number of collective pitch servos is highlighted on the screen. You can now determine the required variant using the arrow buttons of the right-hand four-way button: “1 servo”: The swashplate is tilted by one roll servo and one pitch-axis servo. Collective pitch is controlled by one separate servo. The “Swashplate mixer” menu point is suppressed in the multi-function menu if you select “1 servo” as the swashplate type. This is because model helicopters with only one collective pitch servo are controlled WITHOUT transmitter mixers for the swashplate functions collective pitch, pitch-axis and roll. “2 servo”: The swashplate is moved axially by two roll servos for collective pitch control; pitch-axis control is de-coupled by a mechanical compensating rocker. “3sv(2rol)”: A symmetrical three-point swashplate linkage using three linkage points arranged equally at 120°, actuated by one pitch-axis servo (front or rear) and two roll servos (left and right). For collective pitch control all three servos move the swashplate axially. “3sv(140)”: Asymmetrical three-point swashplate linkage using three linkage points, connected to one pitch servo (rear) and two roll servos (front left and right). For collective pitch control all three servos move the swashplate axially. “3sv(2nic)”: A symmetrical three-point linkage as above, but rotated through 90°, i. e. one roll servo on one side, and two pitch-axis servos front and rear. Four-point swashplate linkage using two roll and two pitch-axis servos. “4sv(90)”: Note re. “4Sv (90°): As can be seen in the receiver assignment on page 47, the second pitch-axis servo is connected to output 5. For this reason the “Gyro” option, which is assigned to output 5 as standard for systems with 1 … 3 collective pitch servos, is suppressed in the “Helimix” menu and the line of the same name in the “Transmitter control settings” menu. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets the swashplate type to “1 servo”. Swashplate type: 3 servos (140°) Swashplate type: 3 servos (pitch-axis) Swashplate type: 1 servo Swashplate type: 4 servos (90°), 2 pitch / 2 roll Swashplate type: 2 servos Note: With the exception of the “1 servo” pre-set, the swashplate mixer ratios are set in the “Swashplate mixers” menu; see page 112. Swashplate type: 3 servos (2 roll) Program description: base settings - model helicopter 33112_mx12_HoTT_2_GB.indd Abs25:65 65 06.06.2011 19:39:38 Cut off As part of the auto-rotation set-up procedure of the mx-12 HoTT transmitter’s Helicopter program there is the option to define a “motor OFF” position for the throttle servo or speed controller for use in an emergency. However, if you set an idle position in the “Throttle” line instead of an emergency OFF position - for example, in order to avoid having to re-start the engine after every practice auto-rotation landing - then this option is not available. In this case we recommend that you use the “Motor stop” option described below as the emergency OFF solution. Depending on the option (“forward / back”) you have selected in the “Collective pitch minimum” line, you can define a “Motor OFF” position in this menu line which can be called up by operating a switch. The default settings are -100% for the “Motor OFF” position of the throttle servo and +150% for the throttle curve: STARLET mod name stick mode 3sv(2rol) swashplate cut off –125% +150% ––– right rotor direct STO The - high - pre-set value in the centre column ensures that the motor can be stopped over the maximum possible range of the throttle curve using the switch which has yet to be assigned in the right-hand column. However, if you prefer to set your own individual limit, i. e. the point after which it is possible to switch to the motor OFF position, move the throttle / collective pitch stick to the position you desire, than press the central SET button of the right-hand four-way button: STARLET mod name stick mode 3sv(2rol) swashplate cut off –125% +100% ––– right rotor direct STO STARLET mod name stick mode 3sv(2rol) swashplate cut off –100% +150% ––– right rotor direct STO If you wish to change the pre-set value for the “Motor OFF” position of the throttle servo, press the central SET button of the right-hand four-way button. The current setting is highlighted. Now use the arrow buttons of the right-hand four-way button to enter a value at which the motor is reliably “off”, but without stalling the throttle servo. For example: -125%: 66 Note: You can obtain a switching threshold of more than +100% by temporarily increasing the travel of servo 1 to more than 100% in the “Servo settings” menu, then returning it to the original value after storing the switching threshold. STARLET mod name stick mode 3sv(2rol) swashplate cut off –125% +100% 1 right rotor direct STO Direction of rotation of main rotor STARLET mod name stick mode 3sv(2rol) swashplate cut off –125% +100% 1 right rotor direct In the “Rotor direction” line you enter the direction of rotation of the main rotor using the arrow buttons of the right-hand four-way button, after pressing the central SET button: “right”: the main rotor spins clockwise as viewed from above. “left”: the main rotor spins anti-clockwise as viewed from above. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) switches to “right”. In the right-hand column you can now assign a switch which can be used (in an emergency) to cut the motor. We recommend the self-centring momentary button SW 1: Program description: base settings - model helicopter 33112_mx12_HoTT_2_GB.indd Abs25:66 06.06.2011 19:39:38 Press the central SET button of the right-hand four-way button, and the direction of operation of the throttle / collective pitch stick is highlighted. Now you can select the required variant using the arrow buttons of the righthand four-way button: Pitch Timers Two timers are shown in the basic display: one stopwatch and one flight timer. STARLET #02 6.1V 99% 0:00h right-hand rotation 0:00 0:00 K78 HoTT 0.0V left-hand rotation The program requires this information in order to set up the mixers to work in the correct “sense”; this applies to the mixers which compensate for rotor torque and motor power. You will find these in the “Helicopter mixer” menu: Pitch Ch1 ¼ throttle Ch1 ¼ tail rotor Collective pitch min. stick mode 3sv(2rol) swashplate cut off –125% +100% 1 right rotor direct pitch min rear In the “Collective pitch min.” line you can set up the direction of operation of the throttle / collective pitch stick to suit your preference. This setting is crucial to the correct operation of all the other options in the helicopter program which affect the throttle and collective pitch functions, i. e. the throttle curve, idle trim, tail rotor mixer etc. 33112_mx12_HoTT_2_GB.indd Abs25:67 stop flt A physical switch or a control switch - e. g. the control switch G3 located on the throttle limiter - can be assigned to these two timers in the “Timers” line … The meaning is as follows: “front”: minimum collective pitch when the collective pitch stick (Ch 1) is “forward” (away from you); “rear”: minimum collective pitch when the collective pitch stick (Ch 1) is “back” (towards you). Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) returns the collective pitch min. position to “rear”. 3sv(2rol) swashplate cut off –125% +100% 1 right rotor direct pitch min rear timer 0:00 ––– … using the switch symbol at the bottom right-hand side of the screen. The assigned switch starts both timers, and also halts the stopwatch. The method of assigning a physical switch or a control Note: switch is described on page 39. • The Ch 1 trim always affects the throttle servo only. The flight timer, and the saving of telemetry data on a memory card inserted in the card slot (see page 22) • By default what is known as the “throttle limiter” is set always starts simultaneously with the stopwatch, but (see page 79); this limits the travel of the throttle sercontinues to run even when the stopwatch is halted vo in the direction of maximum throttle, acting sepa(switched off). It can only be stopped by pressing the rately from the collective pitch servos. This point can central ESC button of the left-hand four-way button with be programmed using the “Lim” input in the “Transthe stopwatch halted. mitter control settings” menu. Once stopped, both timers can be reset to the initial value by simultaneously pressing the cd buttons of Program description: base settings - model helicopter 67 06.06.2011 19:39:38 the right-hand four-way button (CLEAR). Switching between “count-up” and “count-down” Count-up timer (stopwatch function) If you assign a switch and start the stopwatch with the initial value of “0:00”, the timer runs up until the maximum of 180 minutes and 59 seconds, then re-starts at 0:00. Count-down timer (timer function) In the left-hand minutes field you can select a starting time within the range 0 to 180 minutes; in the right-hand seconds field the range is 0 to 59 seconds. Any combination of times can also be selected. Simultaneously pressing the cd buttons of the righthand four-way button (CLEAR) resets any settings you have entered to “0” or “00”. 3sv(2rol) swashplate cut off –125% +100% 1 right rotor direct pitch min rear timer 10:01 G3 Procedure 1. Select the desired input field using the arrow buttons ef of the left or right-hand four-way button. 2. Press SET in the centre of the right-hand four-way button. 3. Select the required time in the highlighted minutes and seconds fields using the arrow buttons of the right-hand four-way button. 4. Press the central SET button to conclude the input process. 68 5. Switch back to the basic display by repeatedly pressing the central ESC button of the left-hand four-way button. With the stopwatch halted, press the cd buttons of the right-hand four-way button simultaneously (CLEAR) to switch the stopwatch to the “Timer” function; see top right in the next illustration: STARLET #02 6.1V 99% 0:00h stop flt 10:01 0:00 K78 HoTT 0.0V If you now operate the assigned switch, the stopwatch starts from the set initial value, counting down (“Timer function”). When the set time has elapsed, the timer does not stop, but continues to run to allow you to read off the time elapsed after reaching zero. To make this clear, the over-run time is shown highlighted (black background). Sequence of sounds 30 sec. before zero: triple beep single beep every two seconds 20 sec. before zero: double beep single beep every two seconds 10 sec. before zero: single beep single beep every second 5 sec. before zero: single beep every second at higher rate zero: longer beep; display switches to inverse video The “alarm timer” is reset by simultaneously pressing the cd or ef buttons of the right-hand four-way but- ton (CLEAR) after you have halted the timer. Note: A count-down timer is indicated in the basic display by a flashing colon (:) between the minutes field and the seconds field. Phase 2 You will automatically be in the “normal” flight phase 1 unless you have already assigned a switch to phase 2 or auto-rotation. Both the number and name of this flight phase are fixed permanently as “normal”, and cannot be changed. For this reason the “normal” phase is simply concealed, i. e. it is not displayed as phase 1. cut off –125% +100% 1 rotor direct right rear pitch min 10:01 G3 timer phase 2 hover ––– It is also important to understand that the flight phases have their own inherent priorities which need to be observed, particularly when assigning individual switches. The underlying scheme can be described as follows: • If all assigned flight phase switches are closed or open, the “normal” flight phase is active. • If only one switch is closed, then the flight phase assigned to the currently closed switch is active. • The “auto-rotation phase” ALWAYS has precedence over all other flight phases, regardless of the priorities outlined above. When the auto-rotation phase is selected, the switch is always made WITHOUT DELAY. Program description: base settings - model helicopter 33112_mx12_HoTT_2_GB.indd Abs25:68 06.06.2011 19:39:38 • With this in mind, you may wish to alter the default flight phase name “Hover” for flight phase 2 to take the inherent priorities into account; see below. • At the servo end the transition does not occur “abruptly”, but with a fixed transition period of about one second. Programming When you select “Phase 2” using the arrow buttons cd of the left or right-hand four-way button, the “Name” field for that flight phase is already framed. If the default name does not seem appropriate, press the central SET button of the right-hand four-way button, and the current setting is shown highlighted. Now use the arrow buttons of the right-hand four-way button to select an appropriate name from those available. Press the SET button to conclude the input process. Now press the f button of the left or right-hand fourway button to move to the right-hand column, at the bottom of the screen indicated by the switch symbol , and press the central SET button. You can now assign a switch to the phase as described on page 39. For more information on flight phase programming please refer to page 94, in the section entitled “Flight phase specific settings for collective pitch, throttle and tail rotor”. Auto-rotation rotor direct pitch min timer phase 2 autorotat. right rear 10:01 G3 hover 5 ––– The name “Auto-rotation” is permanently assigned to Phase 3, and CANNOT be altered. The only available option is to assign a switch to it using the switch symbol at the right of the screen. For more information on programming flight phases please refer to the “Helicopter mixers” section starting on page 94. Receiver output For maximum flexibility in terms of receiver socket assignment, the mx-12 HoTT software provides the means to swap over the servo outputs 1 to max. 6; this is carried out on the second page of the “Receiver output” sub-menu. pitch min timer phase 2 autorotat. receiv out rear 10:01 G3 hover 5 Press the central SET button of the right-hand four-way button to move to the next page of the display. Here you can assign the transmitter’s six “control channels” to any receiver output you wish to use, i. e. servo sockets 1 … 6. However, please note that the display in “Servo display” - which you can access from virtually any menu position by simultaneously pressing the e and f buttons of the left-hand four-way button - refers exclusively to the “control channels”, i. e. the outputs are NOT swapped over. output output output output output Use the arrow buttons cd of the left or right-hand fourway button to select the servo / output combination you wish to change, then press the central SET button of the right-hand four-way button. Now you can assign the desired servo (S) to the selected output using the righthand arrow buttons, and confirm your choice with SET … or alternatively press the cd or ef buttons of the right-hand four-way button (CLEAR) simultaneously to revert to the default sequence. Please note that any subsequent changes to servo settings, such as servo travel, Dual Rate / Expo, mixers etc., must be carried out according to the original (default) receiver socket sequence. Typical application: In the helicopter program of the mx-12 HoTT the outputs for one collective pitch servo and the throttle servo have been interchanged compared to all earlier GRAUPNER/JR mc-systems. The throttle servo is now assigned to receiver output “6” and the collective pitch servo to output “1”. However, you may wish to retain the earlier configuration. Program description: base settings - model helicopter 33112_mx12_HoTT_2_GB.indd Abs25:69 69 06.06.2011 19:39:38 S output output output output output output Note: It is also possible to distribute the control functions amongst as many receivers as you wish, using the channel-mapping function in the mx-12 HoTT’s integral Telemetry menu, or even to assign the same control function to multiple receiver outputs. However, we strongly recommend that you use only one of the two options, as a combination will soon lead to confusion. rx bind (Bound receiver) Graupner HoTT receivers have to be “instructed” to communicate exclusively with a particular model (i. e. model memory) of a Graupner HoTT transmitter. This process is known as “binding”, and is only necessary once for each new combination of receiver and model. It can be repeated at any time. Important note: When carrying out the binding procedure, please ensure that the transmitter aerial is always an adequate distance from the receiver aerials: keeping the aerials about 1 m apart is safe in this respect. Otherwise you risk a failed connection to the downlink channel, and consequent malfunctions. “Binding” multiple receivers to one model If necessary, it is possible to bind more than one re70 ceiver to a single model. This is accomplished by initially binding the receivers individually, as described in the next section. When operating the system, please note that only the receiver which was bound last will establish a telemetry link to the transmitter. For this reason all telemetry sensors installed in the model must be connected to this receiver, since only the last bound receiver is able to transmit their data via the down-link channel. The second, and all other receivers, run in parallel to the receiver last bound to the transmitter, but completely independently of it; they operate in Slave mode with the down-link channel switched off. “Binding” transmitter and receiver Use the arrow buttons cd of the left or right-hand fourway button to move to the “rx bind” line: timer phase 2 autorotat. receiv out rx bind 10:01 G3 hover 5 ––– If you have not already done so, switch on the power supply to your receiver now: the green LED on the receiver flashes once briefly, then goes out. Press and hold the SET button on the receiver until the green LED starts to flash. Briefly press the central SET button of the right-hand four-way button to initiate the so-called binding process between a receiver and the current model memory. At the same time the word “BINDING” starts flashing on the screen in the frame of the “rx bind” line, instead of the three “---”: timer phase 2 autorotat. receiv out rx bind 10:01 G3 hover 5 BINDING If the receiver LED glows a constant green within about ten seconds, then the binding process has been completed successfully; you can now release the receiver’s SET button. Your model / receiver combination is now ready for use. In parallel with this the screen displays the code number for the receiver now “bound” to this model memory. For example: timer phase 2 autorotat. receiv out rx bind 10:01 G3 hover 5 R06 Conversely, if the green LED on the receiver flashes for longer than about ten seconds, then the binding process has failed. In parallel with this the screen will display three “---” once more. If this should occur, alter the relative position of the aerials, and repeat the whole procedure. Program description: base settings - model helicopter 33112_mx12_HoTT_2_GB.indd Abs25:70 06.06.2011 19:39:39 Range test The integral range-check reduces the transmitter’s output power in such a way that you can test the system’s operation at a distance of up to about fifty metres. Carry out the range-check of the Graupner HoTT system in accordance with the following instructions. We recommend that you ask a friend to help with range-checking. 1. Install the receiver in the model as required, preferably after completing the binding process with the transmitter. 2. Switch the radio control system on and wait until the green LED on the receiver glows. Now you can observe the servo movements. 3. Place the model on a flat surface (paving, close-mown grass or earth), with the receiver aerials at least 15 cm above the ground. This means that you may have to place the model on a raised object for the period of the check. 4. Hold the transmitter at hip-height, and away from your body. Do not point the aerial straight at the model; instead rotate and / or angle the aerial tip so that it is vertical while you carry out the check. 5. If you have not already done so, use the arrow buttons cd of the left or right-hand four-way button to move to the “Test range” line, and initiate rangecheck mode by pressing the central SET button of the right-hand four-way button: phase 2 autorotat. receiv out rx bind range test speed R06 99sec When you start the range-check, the transmitter’s output power is significantly reduced, and the blue LED on the aerial base starts to flash. At this point the time display on the transmitter screen starts counting down, and a double beep sounds every five seconds. From five seconds before the end of the range-check you will hear a triple beep every second. When the 99 seconds of the range-check period have elapsed, the transmitter switches back to full power, and the blue LED glows constantly once more. 6. Within this period walk away from the model, moving the sticks all the while. If at any point within a distance of about fifty metres you notice a break in the connection, attempt to reproduce it. 7. If the model is fitted with a motor, switch it on in order to check the system’s interference rejection. 8. Walk further away from the model until you no longer have full control over it. 9. At this point wait until the test period has elapsed, with the model still switched on and ready for use. When the range-check period is over, the model should respond again to control commands. It this is not 100% the case, do not use the system. Contact your nearest Graupner Service Centre. 10.Carry out a range-check before every flight, and simulate all the servo movements which are likely to occur in a typical flight. To ensure safe operation of the model, the range must always be at least fifty metres on the ground. RF transmit In this menu line you can manually switch the transmitter’s RF transmission on and off again for a specific model for the period that the transmitter is currently switched on. For example, you might wish to do this to save power when demonstrating the programming of a model. If you switch the transmitter off with the RF module switched off, next time you switch the transmitter on it will be switched back on again. Use the arrow buttons cd of the left or right-hand fourway button to move to the “RF transmit” line, and press the central SET button of the right-hand four-way button to activate the value window: autorotat. receiv out rx bind range test RF transmit R06 99sec ON Now you can use the right-hand arrow buttons to switch between OFF and ON. Press the central SET button of the right-hand four-way button again to conclude the input. Caution: Never initiate a range-check when you are actually operating a model! Program description: base settings - model helicopter 33112_mx12_HoTT_2_GB.indd Abs25:71 71 06.06.2011 19:39:39 Servo settings Servo direction, centre, travel S1 S2 S3 S4 S5 rev 0% 0% 0% 0% 0% cent 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% trav + In this menu you can adjust parameters which only affect the servo connected to a particular receiver output, namely the direction of servo rotation, neutral point and servo travel. Always start with the servo setting in the left-hand column.v Basic procedure: 1. Use the arrow buttons cd of the left or right-hand four-way button to select the relevant servo (1 to 6). 2. If necessary, use the arrow buttons ef of the left or right-hand four-way button to select the desired column, and move the associated transmitter control away from its centre position if you wish to define an asymmetrical setting. 3. Press the central SET button of the right-hand fourway button, and the corresponding input field is highlighted (black background). 4. Set the appropriate value using the arrow buttons of the right-hand four-way button. 5. Press the central SET button of the right-hand fourway button to conclude the input process. 6. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets any settings you have entered to the default value. receiver output socket to which a particular servo(s) is connected, assuming that these have not been swapped over. This means that changing the stick mode does not affect the numbering of the servos. Column 2 “Rev.” The direction of servo rotation can be adjusted to suit the actual installation in your model. This means that you don’t need to concern yourself with servo directions when installing the mechanical linkages in the model, as you can reverse them as and when necessary. The direction of rotation is indicated by the symbols “=>” and “<=”. Be sure to set the direction of servo rotation before you make adjustments to the remaining options! Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the direction of rotation to “=>”. normal normal reversed Column 3 “Centre” The facility to offset the servo travel centre is intended for adjusting servos whose centre setting is not standard (servo centre point at 1.5 ms or 1500 µs), and also for minor adjustments, e. g. when fine-tuning the neutral position of the model’s control surfaces. The neutral position can be shifted over the range -125% to +125% of normal servo travel, within the maximum servo travel of +/- 150%, regardless of the trim lever position and any mixers you have set up. The setting affects the associated servo directly, independently of all other trim and mixer settings. However, please note that an extreme shift of the servo’s neutral point may result in servo travel to one side of neutral only, as total servo travel is limited to +/- 150% for both electronic and mechanical reasons. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the value in the highlighted input field to “0%”. Ser vo travel 25 -1 tre adjustment Cen +1 25 reversed Important: The numbers in the servo designations refer to the 72 Program description: servo settings 33112_mx12_HoTT_2_GB.indd Abs26:72 06.06.2011 19:39:39 Column 4 “- Servo travel +” In this column you can adjust servo travel symmetrically or asymmetrically (different each side of neutral). The adjustment range is 0 … 150% of normal servo travel. The reference point for the set values is the setting in the “Centre” column. To set symmetrical travel, i. e. to adjust travel equally on both sides of neutral, move the associated transmitter control (stick, proportional rotary knob or switch) to a position in which the marking frame encloses both sides of the travel setting. directly by a stick channel, or by means of any type of mixer function. Note: You may need to assign a transmitter control to a servo which is connected to one of the control channels 5 and 6; this is accomplished in the “Transmitter control settings” menu; see next page. Important: In contrast to the “Transmitter control settings” menu, this setting affects the servo directly, regardless of how the control signal for this servo is generated, i. e. either Servo travel To set up asymmetrical travel, move the associated transmitter control (stick, rotary proportional knob or switch) to the side to be adjusted, so that the marking frame only encloses the value you wish to change. Press the central SET button of the right-hand four-way button to activate value adjustment; the value field is now highlighted. Use the arrow buttons of the right-hand four-way button to change the values. A further brief press on the central SET button of the right-hand fourway button concludes the input process. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the parameter in the highlighted input field to 100%. The graph alongside shows an example of asymmetrical servo travel, with a setting of -50% and +150%. Transmitter control travel Program description: servo settings 33112_mx12_HoTT_2_GB.indd Abs26:73 73 06.06.2011 19:39:39 Transmitter control settings Basic procedures for assigning transmitter controls and switches I5 free I6 free +100% +100% +100% +100% tr v In addition to the two dual-axis stick units for the control functions 1 to 4, the mx-12 HoTT is fitted as standard with a range of supplementary controls: • Two rotary proportional controls: CTRL 7 and 8. These are included in the menu as “ctrl 7” and “ctrl 8”. • Two three-position switches: SW 4/5 or CTRL 9 and SW 6/7 or CTRL 10. These are assigned in this menu as “ctrl 9” and “ctrl 10” respectively. • One two-position switch: SW 3. This is indicated in the menu by “3” plus a switch symbol, which indicates the direction of operation of the switch. • One momentary switch: SW 1. This is indicated by “1” plus a switch symbol and direction indicator, as mentioned above. The two dual-axis stick units directly affect the servos connected to receiver outputs 1 … 4 (assuming that you have set up a newly initialised model memory with the model type “Fixed-wing model”). In contrast, the “supplementary” transmitter controls listed above are inactive when the transmitter is in its default state (as delivered). As already mentioned on page 20, this means that the transmitter in its basic form only controls servos connected to receiver outputs 1 … 4 using the primary sticks - even when you have initialised a new model memory with the model type “Fixed-wing model” and “bound” it to the receiver you intend to install. Any servos connected to receiver sockets 5 and 6 simply stay 74 at their centre point when you operate the associated transmitter controls. This may seem rather inconvenient at first sight, but it is the only way to ensure that you can select any of the “supplementary” transmitter controls for any task you like, and that you are not required deliberately to “program away” the transmitter controls which are not required for a particular model. Any superfluous transmitter control will have an effect on your model if you operate it by mistake unless it is inactive, i. e. unless no function is assigned to it. That is why you can select these “supplementary” transmitter controls with complete freedom in the “Transmitter control settings” menu and assign them to any function input (see page 38) you like, as this method ensures that the transmitter meets your own requirements exactly. This also means that each of these transmitter controls can be assigned to several functions simultaneously. For example, the same toggle switch SW X, which you assign to an input in this menu, can also be assigned as the On / Off switch controlling the “Timers” in the “Basic settings” menu. The basic procedure: 1. Select the appropriate input I5 … I6 using the arrow buttons cd of the left or right-hand four-way button. 2. If necessary, use the arrow buttons ef of the left or right-hand four-way button to switch to the desired column. 3. Press the central SET button of the right-hand fourway button, and the corresponding input field is highlighted. 4. Operate the transmitter control you wish to use, and set the desired value using the arrow buttons of the right-hand four-way button. 5. Press the central SET button of the right-hand fourway button to conclude the input process. 6. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets any settings you have entered to the appropriate default value. Column 2 “Assigning transmitter controls and switches” Select one of the function inputs 5 to 6 using the cd buttons of the right-hand four-way button. Press the central SET button of the right-hand four-way button to activate the assignment facility. I5 free +100% +100% +100% +100% frei desired E6 operate +100% E7 switch frei or+100% control tr v Now move the appropriate transmitter control (CTRL 7 to 10), or operate the selected switch (SW 1 and 3). Note that the rotary proportional controls are not detected until they have moved a few “ratchet clicks”, i. e. they need to be operated for slightly longer. If the travel is not sufficient for the transmitter to detect it, move the control in the opposite direction. If you assign one of the two-position switches, then this control channel works like an On / Off switch. It is then possible to switch to and fro between two end-point values using this simple switch, e. g. motor ON / OFF. The three-position switches SW 4/5 and 6/7, which you Program description: transmitter control settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs27:74 06.06.2011 19:39:39 will find in the “Transmitter control settings” menu as “Control 9” and “Control 10”, provide a centre position in addition to the two end-points. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) with the switch assignment activated - see illustration above - resets the input to “free”. Tips: • When assigning the switches please take care to set them to the appropriate direction of travel, and ensure that all inputs not required are left at or set to “free”, to eliminate the possibility of errors if unused transmitter controls are operated accidentally. • You can alter the effective end-points of an assigned switch by adjusting servo travel, as described in the next section. The screen now displays either the transmitter control number or the switch number, followed by a switch symbol which indicates the direction of operation, e. g.: I5 +100% +100% I6 ctrl 7 +100% +100% tr v Column 3 “-Travel+” In this column the transmitter control can be adjusted symmetrically or asymmetrically, i. e. different to either side. The available range is +/-125% of the normal servo travel. Use the arrow buttons cd of the left or right-hand fourway button to select one of the inputs 5 or 6. If you wish to set up symmetrical travel, i. e. the same in both directions, move the associated transmitter control (rotary proportional controls CTRL 7 or 8 or switches 4/5 and 6/7) to a position at which the marking frame encloses both sides of the travel setting: +100% +100% I5 I6 ctrl 7 +100% +100% tr v If you wish to set up asymmetrical travel, i. e. different for both directions, move the associated transmitter control (rotary proportional control or switch) to a position at which the marking frame encloses the side of the travel setting you wish to change: I5 +100% +100% I6 ctrl 7 +100% +100% tr v hand four-way button to alter the values: +100% +100% I5 I6 ctrl 7 +111% +111% tr v I5 +100% +100% +88% +111% I6 ctrl 7 tr v Press the central SET button of the right-hand four-way button once more to conclude the input process. Negative and positive parameter values are possible; this enables you to set the appropriate direction of movement of the transmitter control or its direction of effect to suit your model. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the altered parameter in the highlighted input field to +100%. Important: In contrast to servo travel adjustments, changing the transmitter travel setting affects all mixer and coupling inputs derived from it, i. e. in the final analysis all the servos which can be operated using the associated transmitter control. Press the central SET button of the right-hand four-way button to activate the value setting; the value field is now shown highlighted. Use the arrow buttons of the rightProgram description: transmitter control settings - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs27:75 75 06.06.2011 19:39:39 Transmitter control settings Basic procedures for assigning transmitter controls and switches +100% +100% gyr free +100% +100% thr free lim ctrl 7 +100% +100% tr v In addition to the two dual-axis stick units for the control functions 1 to 4, the mx-12 HoTT is fitted as standard with a range of supplementary controls: • Two rotary proportional controls: CTRL 7 and 8. These are included in the menu as “ctrl 7” and “ctrl 8”. • Two three-position switches: SW 4/5 or CTRL 9 and SW 6/7 or CTRL 10. These are assigned in this menu as “ctrl 9” and “ctrl 10” respectively. • One two-position switch: SW 3. This is indicated in the menu by “3” plus a switch symbol, which indicates the direction of operation of the switch. • One momentary switch: SW 1. This is indicated by “1” plus a switch symbol and direction indicator, as mentioned above. The two dual-axis stick units directly affect servos connected to receiver outputs 1 … 4 and 6 (assuming that you have set up a newly initialised model memory with the model type “Helicopter”). In contrast, the “supplementary” transmitter controls listed above are inactive when the transmitter is in its default state (as delivered). The exception is the rotary proportional knob CTRL 7 (throttle limiter), which acts upon servo 6 by default. As already mentioned on page 20, this means that the transmitter in its basic form only controls servos connected to receiver outputs 1 … 4 using the primary sticks, plus servo 6 - depending on the position of the throttle limiter - even when you have initialised a new 76 model memory with the model type “Helicopter” and “bound” it to the receiver you intend to install. Any servo connected to receiver socket 5 simply stays at its centre point when you operate the associated transmitter controls. This may seem rather inconvenient at first sight, but it is the only way to ensure that you can select any of the “supplementary” transmitter controls for any task you like, and that you are not required deliberately to “program away” the transmitter controls which are not required for a particular model. Any superfluous transmitter control will have an effect on your model if you operate it by mistake, unless it is inactive, i. e. unless no function is assigned to it. That is why you can select these “supplementary” transmitter controls with complete freedom in the “Transmitter control settings” menu, and assign them to any function input (see page 38) you like, as this method ensures that the transmitter meets your own requirements exactly. This also means that each of these transmitter controls can be assigned to several functions simultaneously. For example, the same toggle switch SW X which you assign to an input in this menu, can also be assigned as the On / OFF switch controlling the “Timers” in the “Basic settings” menu. Note: For model helicopters input 6 must always be left “free”. Please see the section entitled “Throttle” on the next double-page. The basic procedure 1. Select the appropriate input I5 … I6 using the arrow buttons cd of the left or right-hand four-way button. 2. If necessary, use the arrow buttons ef of the left or right-hand four-way button to switch to the desired column. 3. Press the central SET button of the right-hand fourway button, and the corresponding input field is highlighted. 4. Operate the transmitter control you wish to use, and set the desired value using the arrow buttons of the right-hand four-way button. 5. Press the central SET button of the right-hand fourway button to conclude the input process. 6. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets any settings you have entered to the appropriate default value. Column 2 “Assigning transmitter controls and switches” Select one of the function inputs gyro, throttle or lim using the cd buttons of the left or right-hand four-way button. Press the central SET button of the right-hand four-way button to activate the assignment facility. lim ctrl 7 +100% +100% +100% +100% Gasoperate frei desired +100% Gyrswitch frei or+100% control tr v Now move the appropriate transmitter control (CTRL 7 to 10), or operate the selected switch (SW 1 or 3). Note that the rotary proportional controls are not detected until they have moved a few “ratchet clicks”, i. e. they Program description: transmitter control settings – model helicopter 33112_mx12_HoTT_2_GB.indd Abs28:76 06.06.2011 19:39:39 need to be operated for slightly longer. If the travel is not sufficient for the transmitter to detect it, move the control in the opposite direction. If you assign one of the two-position switches, then this control channel works like an On / Off switch. It is then possible to switch to and fro between two end-point values using this simple switch, e. g. motor ON / OFF. The three-position switches SW 4/5 and 6/7, which you will find in the “Transmitter control settings” menu as “CTRL 9” and “CTR 10”, provide a centre position in addition to the two end-points. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) with the switch assignment activated - see illustration above - resets the input to “free”. Tips: • When assigning the switches please take care to set them to the appropriate direction of travel, and ensure that all inputs not required are left at or set to “free”, to eliminate the possibility of errors if unused transmitter controls are operated accidentally. • You can alter the effective end-points of an assigned switch by adjusting servo travel as described in the next section. The screen now displays either the transmitter control number or the switch number, followed by a switch symbol which indicates the direction of operation, e. g.: +100% +100% gyr +100% +100% thr free lim ctrl 7 +100% +100% tr v Column 3 “-Travel+” In this column the transmitter control can be adjusted symmetrically or asymmetrically, i. e. different to either side. The available range is +/-125% of the normal servo travel. Use the arrow buttons cd of the left or right-hand four-way button to select one of the inputs gyro, throttle or lim. If you wish to set up symmetrical travel, i. e. the same in both directions, move the associated transmitter control (rotary proportional control or switches 4/5 and 6/7) to a position at which the marking frame encloses both sides of the travel setting: gyr +100% +100% thr free +100% +100% lim ctrl 7 +100% +100% tr v If you wish to set up asymmetrical travel, i. e. different for both directions, move the associated transmitter control (rotary proportional control or switch) to a position at which the marking frame encloses the side of the travel setting you wish to change: +100% +100% gyr +100% +100% thr free lim ctrl 7 +100% +100% tr v Press the central SET button of the right-hand four-way button to activate the value setting; the value field is now shown highlighted. Use the arrow buttons of the righthand four-way button to alter the values: +100% +100% gyr +100% +100% thr free lim ctrl 7 +111% +111% tr v gyr +100% +100% +100% +100% thr free +88% +111% lim ctrl 7 tr v Press the central SET button of the right-hand four-way button to conclude the input process. Negative and positive parameter values are possible; this enables you to set the appropriate direction of movement of the transmitter control or its direction of effect to suit your model. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the altered parameter in the highlighted input field to +100%. Program description: transmitter control settings – model helicopter 33112_mx12_HoTT_2_GB.indd Abs28:77 77 06.06.2011 19:39:39 Important: In contrast to servo travel adjustments, changing the transmitter travel setting affects all mixer and coupling inputs derived from it, i. e. in the final analysis all the servos which can be operated using the associated transmitter control. „Gyr“ “Throttle” gyr free +100% +100% thr free +100% +100% lim ctrl 7 +100% +100% tr v If the gyro you are using features infinitely variable gain control, then you can pre-set the static gyro effect by setting an “offset” within the range +/-125%, separately for each flight phase, in the “Gyro” line of the “Helicopter mixers” menu - see the section starting on page 98. Once you have entered these pre-defined - static - gain settings (set separately for each flight phase in the “Helicopter mixers” menu), you can use a transmitter control such as the rotary proportional control CTRL 8 to vary gyro gain around the set “offset point”; all you have to do is assign that transmitter control in the “Gyro” line of this menu: in the centre position of the transmitter control this corresponds to the setting selected in the “Helicopter mixers” menu (see section starting on page 98). If the transmitter control is moved from this centre point in the direction of full travel, gyro gain is increased; towards the opposite end-point it is reduced. This is a fast, simple method of fine-tuning gyro gain when the model is in flight - perhaps to suit varying weather conditions - or alternatively to find the optimum setting. In software terms you can also limit the gain range to both sides by restricting the transmitter control travel. However, please be sure to read the set-up notes provided with your gyro before carrying out these adjustments, as you could render your helicopter uncontrollable if you make a mistake. 78 gyr ctrl 8 +100% +100% thr free +100% +100% lim ctrl 7 +100% +100% tr v In principle all transmitter controls (rotary proportional knob) and switches present on the transmitter can be assigned to the individual inputs within the Helicopter program. However, please note that all inputs available in this menu are already pre-defined for helicopter-specific functions, and for this reason cannot always be used without restriction. For example, the receiver sequence printed on page 47 shows that the throttle servo (or the speed controller of an electric-powered model helicopter) must be connected to receiver output “6”, i. e. control channel “6” is reserved for motor speed control. However, in contrast to a fixed-wing aircraft, the throttle servo or speed controller is not directly controlled by the throttle stick or any other transmitter control, but via a complex mixer system - see “Helicopter mixers” menu, starting on page 94. The “throttle limit function” (described on the next page) also has an influence on this mixer system. Assigning a transmitter control or switch in the “Throttle” line, or its supplementary control signal, would only unnecessarily “confuse” this complex mixer system. For this reason the “Throttle” input MUST always be left “free” when you are programming a model helicopter. Program description: transmitter control settings – model helicopter 33112_mx12_HoTT_2_GB.indd Abs28:78 06.06.2011 19:39:39 Throttle limit function “Lim” input By default the “lim” input is assigned to the rotary proportional control CTRL 7, which is located at top left on the transmitter: gyr ctrl 8 +100% +100% thr free +100% +100% lim ctrl 7 +100% +100% tr v This pre-defined assignment eliminates the need to program two flight phases - “with idle-up” and “without idle-up” - as are often used by other radio control systems for this purpose, since the method of raising the system rotational speed below the hover point is more flexible with the mx-12 HoTT program, and can be fine-tuned more accurately than using the conventional “idle-up” function. However, if you prefer to program your helicopter “with idle-up”, then switch off the “throttle limit” function, described below, by setting the “Lim” input to “free”. Meaning and application of “throttle limit” As mentioned previously under “Throttle”, the power output of the engine or motor of a model helicopter is not controlled directly using the throttle (Ch 1) stick - in contrast to fixed-wing model aircraft. Instead it is controlled indirectly by the throttle curve settings which you set up in the “Helicopter mixers” menu. Alternatively the throttle is controlled by the speed controller if the unit you are using is a governor or regulator. Note: Naturally it is possible to set up different throttle curves to suit different stages of flight using flight phase pro- 33112_mx12_HoTT_2_GB.indd Abs28:79 gramming. By their very nature, both methods of controlling power have the same result, i. e. that a helicopter’s motor never gets anywhere near its idle speed during “normal” flying, so it is impossible to start or stop the motor easily unless some other means is used. The “Throttle limiter” function solves this problem in an elegant manner: a separate transmitter control - as standard this is the rotary proportional control CTRL 7 located at top left on the transmitter - is employed to limit the setting of the throttle servo or the speed controller, which means that you can throttle right back to the idle position. At this setting the trim of the throttle / collective pitch stick assumes control, and can be used to switch off an electric motor directly. At the other extreme, the throttle servo or speed controller can, of course, only reach its full-throttle position if you release full servo travel using the throttle limit control. That is why the “lim” input is reserved in the Helicopter program for the “Throttle limiter” function. For this reason the right-hand positive value in the “Travel” column must be large enough to ensure that it does not limit the full-throttle setting available via the throttle curve settings when the throttle limit control is at its maximum position. Usually this means a value in the range +100% to +125%. The left-hand negative value in the “Travel” column should be set in such a way that the throttle limit control reliably cuts the electric motor, or closes the throttle to the point where you can cut the I.C. motor using the (digital) Ch 1 trim. For this reason you should leave this value at +100%, at least for the time being. This variable “limiting” of throttle travel provides a convenient means of starting and stopping the motor. However, it also gives an additional level of safety if, for example, you have to carry your helicopter to the flight line with the motor running: you simply move the control to its minimum position, and this prevents any accidental movement of the Ch 1 stick affecting the throttle servo. If the carburettor is too far open (or the speed controller not at “stop”) when you switch the transmitter on, you will hear an audible warning, and the screen displays the message: throttle too high ! Tip: You can call up the “Servo display” menu to check the influence of the throttle limit slider. This menu can be accessed from virtually any menu points by simultaneously pressing the ef buttons of the left-hand four-way button. Bear in mind that servo output 6 controls the throttle servo on the mx-12 HoTT. Basic idle setting Start by turning the throttle limiter - by default the rotary proportional knob CTRL 7 located at top left on the transmitter - clockwise to its end-point. Move the throttle / collective pitch stick to the maximum position, and ensure that a standard throttle curve is active in the “Channel 1 ¼ throttle” sub-menu of the … “Heli mixer” (page 94 … 105) … menu. If you have already altered the standard throttle curve which is present when you first initialise a model memory, then this should be reset to the values “Point 1 = -100%”, “Point 3 = 0%” and “Point 5 = +100%” - at least temporarily. Program description: transmitter control settings – model helicopter 79 06.06.2011 19:39:39 ch1 thr input output point 3 0% 0% 0% To complete this basic set-up you still have to adjust the idle trim range to coincide with point “1” of the throttle curve. This is accomplished by setting point “1” of the “Ch 1 ¼ throttle” mixer in the “Heli mixer” menu to a value of about -65 to -70%: ch1 Note: Since the throttle trim lever has no effect when the throttle limiter is open, its position is not relevant at this point. Now - without starting the glow motor - adjust the mechanical linkage of the throttle servo so that the carburettor barrel is fully open; if necessary, carry out fine-tuning using the travel setting for servo 6 in the “Servo settings” menu. Close the throttle limiter completely by turning the rotary proportional knob CTRL 7 anti-clockwise to its endpoint. Use the trim lever of the throttle / collective pitch stick to move the trim position marker to the motor OFF position (see illustration in the right-hand column of the next page). Note: In contrast, when the throttle limiter is closed, the position of the throttle / collective pitch stick is not relevant; it can therefore be left in the maximum collective pitch position, i. e. the throttle linkage can be adjusted between full-throttle (throttle limiter open) and “motor OFF” (throttle limiter closed) using just the throttle limiter. thr –100% input output –66% point 1 –66% To check that the setting is exact, i. e. that there is a seamless transition from idle trim to the throttle curve, you need to close the throttle limiter and move the collective pitch stick to and fro slightly at the minimum end-point. When you do this, the throttle servo must not move! In any case fine-tuning must be carried out with the model flying. The motor is always started with the throttle limiter completely closed; this has the effect that the idle speed is adjusted solely using the trim lever of the throttle / collective pitch stick. Throttle limit in conjunction with the digital trim When used with the throttle limit control CTRL 7, the Ch 1 trim places a marker at the set idle position of the motor; at this point the motor can be stopped using the trim. If the trim is in its end-range (see screen-shot: top picture in the right-hand column), then a single click Now, with the throttle limiter closed, adjust the mechaniimmediately takes you back to the marker, i. e. to the cal throttle linkage so that the carburettor is just fully pre-set idle position (see also page 40). closed. However, do check carefully that the throttle The cut-off trim only acts as idle trim in the left-hand half servo is not stalled at either of its extreme end-points of the travel of the throttle limit control, i. e. the marker is (full-throttle / motor OFF). only set and stored within this range. 80 Program description: transmitter control settings – model helicopter 33112_mx12_HoTT_2_GB.indd Abs28:80 Last idle position Current trim position GRAUBELE #01 5.2V 50% 3:33h stop flt Throttle limit cont 0:00 0:00 K78 2.4 M RX0.0V CTRL 7 Trim at motor OFF posit For this reason the Ch 1 trim display is also completely suppressed as soon as the throttle limit control is moved to the right of the centre position. GRAUBELE #01 5.2V 50% 3:33h stop flt 0:00 0:00 Throttle limit contro K78 M RX0.0V 2.4 CTRL 7 Note: Since this trim function is only effective in the “Motor off” direction, the illustration above changes if you alter the transmitter control direction for the collective pitch minimum position of the Ch 1 stick from “back” (reflected in the picture above) to “forward” in the “Collective pitch min.” line of the “Basic settings” menu. In the same way the effects shown in the illustration swap sides if you change the stick mode from collective pitch right (reflected in the pictures above) to collective pitch left in the “Stick mode” line of the “Basic settings” menu; see page 67. 06.06.2011 19:39:39 For your notes 33112_mx12_HoTT_2_GB.indd Abs58:81 81 06.06.2011 19:39:39 D/R Expo Switchable control characteristics for aileron, elevator and rudder Use the arrow buttons of the left or right-hand four-way button to leaf through to the “D/R Expo” menu point of the multi-function menu: mod. mem. ser vo set. D/R expo wing mixer ser vo disp fail-safe base sett. contr set. phase trim free mixer basic sett telemetr y A press on the central SET button of the right-hand fourway button opens this menu point: aile 100% elev 100% rudd 100% 0% 0% 0% DUAL EXPO ––– ––– ––– The Dual Rate / Expo function provides a means of switching to reduced control travels, and of influencing the travel characteristics, for aileron, elevator and rudder (control functions 2 ... 4). Dual Rate works in a similar way to transmitter control travel adjustment in the “Transmitter control settings” menu, i. e. it affects the corresponding stick function, regardless of whether that function controls a single servo or multiple servos via any number of complex mixer and coupling functions. For each switch position the servo travels can be set to any value within the range 0 to 125% of full travel. Expo works in a different way. If you set a value greater than 0%, exponential provides fine control of the model around the centre position of the primary control func82 tions (aileron, elevator and rudder), without forfeiting full travel at the end-points of stick movement. If you set a value lower than 0%, travel is increased around the neutral position, and diminishes towards the extremes of travel. The degree of “progression” can therefore be set to any value within the range -100% to +100%, where 0% equates to normal, linear control characteristics. Another application for exponential is to improve the linearity of rotary-output servos, which are the standard nowadays. With a rotary servo the movement of the control surface is inevitably non-linear, as the linear movement of the output disc or lever diminishes progressively as the angular movement increases, i. e. the rate of travel of the control surface declines steadily towards the extremes, dependent upon the position of the linkage point on the output disc or lever. You can compensate for this effect by setting an Expo value greater than 0%, with the result that the angular travel of the output device increases disproportionately as stick travel increases. Like Dual Rates, the Expo setting applies directly to the corresponding stick function, regardless of whether that function controls a single servo or multiple servos via any number of complex mixer and coupling functions. The Dual Rate and Expo functions can be switched on and off together if you assign a switch to the function. The result of this is that Dual Rates and Expo can be controlled simultaneously using a single switch, and this can be advantageous - especially with high-speed models. Flight phase dependent Dual-Rate and Expo settings If you have assigned a switch and - if you wish - a more appropriate name to one of the phases 2 and 3 in the “Base settings” menu (see page 60), then this appears at bottom left, e. g. “normal”. If necessary, operate the associated switch in order to switch between the flight phases. The basic set-up procedure 1. Switch to the desired flight phase, and then select the desired line “aile”, “elev” or “rudd” using the arrow buttons cd of the left or right-hand four-way button. 2. If necessary, use the ef buttons of the left or righthand four-way button to select the desired column. 3. Press the central SET button of the right-hand fourway button: the corresponding input field is now highlighted (black background). 4. Set the desired value using the arrow buttons of the right-hand four-way button. 5. Press the central SET button of the right-hand fourway button to conclude the input process. 6. Simultaneously press the cd or ef buttons of the right-hand four-way button (CLEAR) to reset any changed settings to the default values. Dual Rate function If you wish to switch between two possible D/R settings, use the f button of the left or right-hand four-way button to move to the right-hand column, marked at the bottom edge of the screen with the switch symbol then press the central SET button … aile 100% HR push100% desired SR into 100% position normal DUAL ––– 0% 0% ––– switch ––– 0% ON EXPO Dual Rate / Expo - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs29:82 06.06.2011 19:39:39 Caution: For safety reasons the Dual Rate value should always be at least 20% of total control travel. Examples of different Dual Rate values: normal DUAL EXPO ––– Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value in the highlighted input field to 0%. Servo travel Servo travel Servo travel +11% +22% 0% Dual Rate = 20% Dual Rate = 50% Dual Rate = 100% aile 100% elev 100% rudd 100% Examples of different Expo values: Stick deflection Servo travel Exponential function If you wish to switch between two settings, use the f button of the left or right-hand four-way button to move to the right-hand column, marked at the bottom edge of the screen with the switch symbol , then press the central SET button and assign a switch to the function, as described in the section “Assigning switches and control switches” on page 39. The assigned switch appears on the screen together with a switch symbol which Stick deflection Stick deflection Expo = –100%, DR = 50% Expo = +100%, DR = 50% Expo = +100%, DR = 125% Servo travel Stick deflection Stick deflection e. g. “switch back”: 88% aile 77% elev rudd 100% 0% 0% 0% normal DUAL EXPO ––– and after moving switch “3” to the “forward” position: aile 122% elev 111% rudd 100% +11% +22% 0% normal DUAL EXPO ––– Expo = –100% Expo = +50% Expo = +100% Stick deflection Servo travel Stick deflection Servo travel Stick deflection Combined Dual Rate and Expo If you enter values for both Dual Rates and Expo, the two functions are superimposed as follows: Servo travel indicates the direction of operation when you move the switch. For example, the system enables you to fly with a linear curve characteristic in the one switch position, and to pre-set a value other than 0% in the other switch position. Select the right-hand column, marked with EXPO at the bottom edge of the screen, in order to change the Dual-Rate value for each of the two switch positions in the highlighted field, using the arrow buttons of the righthand four-way button. Servo travel … and assign a physical switch as described in the section “Assigning switches and control switches” on page 39. The assigned switch appears on the screen together with a switch symbol which indicates the direction of operation of the switch. Select the left-hand column, marked DUAL at the bottom edge of the screen, and set the values for each of the two switch positions separately in the highlighted field using the arrow buttons of the right-hand four-way button. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value in the highlighted field to 100%. Stick deflection In these examples the Dual Rate value is 100% in each case. Dual Rate / Expo - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs29:83 83 06.06.2011 19:39:40 D/R Expo Switchable control characteristics for roll, pitch-axis and tail rotor roll nick tail 100% 100% 100% DUAL 0% 0% 0% ––– ––– ––– EXPO The Dual Rate / Expo function provides a means of switching to reduced control travels, and influencing the travel characteristics, for the roll, pitch-axis and tail rotor servos (control functions 2 … 4). A separate curve for control function 1 (motor / collective pitch) can be set individually for throttle, collective pitch and tail rotor in the “Helicopter mixers” menu. These curves feature up to five separately programmable points; see the sections starting on page 94 and 169. Dual Rate works in a similar way to transmitter control travel adjustment in the “Transmitter control settings” menu, i. e. it affects the corresponding stick function, regardless of whether that function controls a single servo or multiple servos via any number of complex mixer and coupling functions. For each switch position the servo travels can be set to any value within the range 0 to 125% of full travel. Expo works in a different way. If you set a value greater than 0%, exponential provides fine control of the model around the centre position of the primary control functions (roll, pitch-axis and tail rotor), without forfeiting full travel at the end-points of stick movement. If you set a value lower than 0%, travel is increased around the neutral position, and diminishes towards the extremes of travel. The degree of “progression” can be set within the range -100% to +100%, where 0% equates to normal, linear control characteristics. 84 Another application for exponential is to improve the linearity of rotary-output servos, which are the standard nowadays. With a rotary servo the movement of the control surface is inevitably non-linear, as the linear movement of the output disc or lever diminishes progressively as the angular movement increases, i. e. the rate of travel of the control surface declines steadily towards the extremes, dependent upon the position of the linkage point on the output disc or lever. You can compensate for this effect by setting an Expo value greater than 0%, with the result that the angular travel of the output device increases disproportionately as stick travel increases. Like Dual Rates, the Expo setting applies directly to the corresponding stick function, regardless of whether that function controls a single servo or multiple servos via any number of complex mixer and coupling functions. The Dual Rate and Expo functions can also be switched on and off together if you assign a switch to the function. The result of this is that Dual Rates and Expo can be controlled simultaneously using a single switch, and this can be advantageous - especially with high-speed models. Flight phase dependent Dual-Rate and Expo settings If you have assigned a switch and - if you wish - a more appropriate name to one of the phases 2 or Auto-rotation in the “Basic settings” menu (see page 68 and 69), then this appears at bottom left, e. g. “normal”. If necessary, operate the associated switch in order to switch between the flight phases. The basic set-up procedure 1. Switch to the desired flight phase, and then select 2. 3. 4. 5. 6. the desired line “Roll”, “Pitch” or “Tail” using the arrow buttons cd of the left or right-hand four-way button. If necessary, use the ef buttons of the left or righthand four-way button to select the desired column. Press the central SET button of the right-hand fourway button: the corresponding input field is now highlighted (black background). Set the desired value using the arrow buttons of the right-hand four-way button. Press the central SET button of the right-hand fourway button to conclude the input process. Simultaneously press the cd or ef buttons of the right-hand four-way button (CLEAR) to reset any changed settings to the default values. Dual Rate function If you wish to switch between two possible D/R settings, use the f button of the left or right-hand four-way button to move to the right-hand column, marked at the bottom edge of the screen with the switch symbol press the central SET button … 0% ––– roll 100% 0% ––– 100% Nick push desired switch 100% 0% ––– Heck into position ON DUAL EXPO … and assign a physical switch as described in the section “Assigning switches and control switches” on page 39. The assigned switch appears on the screen together with a switch symbol which indicates the direction of operation of the switch. Select the left-hand column, marked DUAL at the bottom Program description: Dual Rate / Expo – model helicopter 33112_mx12_HoTT_2_GB.indd Abs30:84 06.06.2011 19:39:40 Examples of different Dual Rate values: Servo travel Servo travel Servo travel Dual Rate = 20% Dual Rate = 50% Dual Rate = 100% +11% +22% 0% normal DUAL EXPO ––– Stick deflection Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value in the highlighted input field to 0%. 88% 77% 100% 0% 0% 0% normal DUAL EXPO ––– and after moving switch “3” to the “forward” position: Stick deflection Servo travel Servo travel Exponential function If you wish to switch between two settings, use the f button of the left or right-hand four-way button to move to the right-hand column, marked at the bottom edge of the screen with the switch symbol , then press the central SET button and assign a switch to the function, as described in the section “Assigning switches and control switches” on page 39. The assigned switch appears on the screen together with a switch symbol which indicates the direction of operation when you move the switch. For example, the system enables you to fly with a linear curve characteristic in the one switch position, and to pre-set a value other than 0% in the other switch posi- roll nick tail Expo = –100% Expo = +50% Expo = +100% Stick deflection Servo travel Stick deflection Stick deflection Stick deflection e. g. “switch back”: Examples of different Expo values: Stick deflection Expo = –100%, DR = 50% Expo = +100%, DR = 50% Expo = +100%, DR = 125% Servo travel 100% 100% 100% roll nick tail Caution: For safety reasons the Dual Rate value should always be at least 20% of total control travel. Combined Dual Rate and Expo If you enter values for both Dual Rates and Expo, the two functions are superimposed as follows: Servo travel tion. Select the right-hand column, marked with EXPO at the bottom edge of the screen, in order to change the Dual-Rate value for each of the two switch positions in the highlighted field, using the arrow buttons of the righthand four-way button. Servo travel edge of the screen, and set the values for each of the two switch positions separately in the highlighted field using the arrow buttons cd or ef of the right-hand four-way button. Simultaneously press the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value in the highlighted field to 100%. Stick deflection 122% 111% 100% +11% +22% 0% normal DUAL EXPO roll nick tail Stick deflection In these examples the Dual Rate value is 100% in each case. ––– Program description: Dual Rate / Expo – model helicopter 33112_mx12_HoTT_2_GB.indd Abs30:85 85 06.06.2011 19:39:40 Phase trim Flight phase-specific trims for flaps, ailerons and elevator If you have not assigned a switch to phases 2 or 3 in the “Basic settings” menu, i. e. you have not assigned switches to these alternative phases, you automatically remain in flight phase 1 - “normal”. The number and name (“normal”) of this flight phase are permanently assigned, and cannot be altered. For this reason the “normal” phase is not stated as Phase 1 “normal” in the “Basic settings” menu; it is simply concealed. tail type aile/flap timer phase 2 phase 3 normal 2aile 10:01 takeoff ––– speed ––– If you select the “Phase trim” menu with this basic arrangement, you will find just the “normal” line on the screen, whose pre-set values of 0% are not usually altered. P H A S E T R I M ¿normal 0% 0% 0% FLA AIL ELE Note: In this menu you will have at least one control function (ELE), and a maximum of three functions (ELE, AIL and FLA), available for phase-specific trim settings, depending on the settings you have entered in the “Aileron / flap” line of the “Basic settings” menu (see page 58). 86 If you wish to enter values other than “0”, e. g. to have more lift at launch, or to be able to fly more slowly when thermalling, or faster when flying speed tasks, but WITHOUT having to change the basic settings each time, then you need to use alternative flight phases. This is done by activating “Phase 2” and, if necessary, “Phase 3” in the “Basic settings” menu. This is accomplished by moving to the “Basic settings” menu and assigning a switch to the selected phase or phases. If you decide to use one of the three-position switches SW 4/5 or 6/7 as the phase switch, then it is advisable to assign it to the “Speed” phase and “Launch” phase at the extremes, with “normal” at the centre position. Notes: • At the centre position of SW 4/5 or 6/7 the switch symbols on the screen should look as in the picture at top right. • Please note the priorities of the individual flight phases, as described in detail on page 60. The default name for “Phase 2” is “Launch”, and that for “Phase 3” is “Speed”. However, you can assign your own choice of names at any time by selecting the appropriate line, pressing the central SET button of the right-hand four-way button, and selecting one of the following names in the highlighted field using the arrow buttons of the right-hand four-way button. • take off • thermal • dist(ance) • speed • acro • landing • air-tow • test aile/flap timer phase 2 phase 3 receiv out 10:01 takeoff speed 2aile These names will appear in the transmitter’s basic display … GRAUBELE #01 5.2V 51% 2:22h 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V … and in the “Phase trim” menu - see lower picture. Setting up flight phase trims In the “Phase trim” menu you can adjust the trims for the previously selected flight phases. The first step is to use the phase switch you have already assigned to move to the phase which you wish to adjust (the “*” at far left indicates the currently active phase). P H A S E T R I M 0% 0% 0% takeoff 0% 0% 0% speed 0% 0% 0% ¿normal FLA AIL ELE Program description: Phase trim – fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs31:86 06.06.2011 19:39:40 Select the desired control surface function using the arrow buttons ef of the left or right-hand four-way button, then press the central SET button of the right-hand four-way button. The trim values in the highlighted value field can now be adjusted using the arrow-buttons of the right-hand four-way button. You can activate each phase by operating the assigned phase select switch or switches. Note that the servos do not change from one setting to another abruptly; they move smoothly with a transition time of around one second. With this option, which works in a similar way to transmitter control sub-trim or offset settings with other radio control systems, it is possible to set values within the range -99% to +99%. However, typical values are normally in single figures or low double figures. P H A S E T R I M normal 0% 0% 0% takeoff +8% 4% +2% ¿ speed –7% –5% –3% FLA AIL ELE If you have made any changes, simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets them to the default value of 0%. Note: In this menu you will have at least one control function (ELE), and a maximum of three functions (ELE, AIL and FLA), available for phase-specific trim settings, depending on the settings you have entered in the “Aileron / flap” line of the “Basic settings” menu (see page 58). Program description: Phase trim – fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs31:87 87 06.06.2011 19:39:40 What is a mixer? Fixed-wing mixers The basic function In many models it is often desirable to use a mixer to couple various control systems, e. g. to link the ailerons and rudder, or to inter-connect a pair of servos where two control surfaces are actuated by separate servos. In all these cases the signal which flows directly from the “output” of a transmitter stick to the associated servo is “bled off” at a particular point - this effect can also be “concealed” in transmitter control options such as “D/R Expo” or “Transmitter control settings” - and the derived signal is then processed in such a way that it affects the “input” of another control channel, and therefore eventually another receiver output. For more information please refer to the general notes on “Free mixers” in the section of this manual starting on page 106. Example: V-tail mixer 4,8 V C 577 Servo C 577 4,8 V Right rudder / elevator Servo Left rudder / elevator Best.-Nr. 4101 er dd Ru er dd r Ru vato Ele Control channels (receiver outputs) V-tail mixer Best.-Nr. 4101 Ru Ele dder vat or vat Ele Control function inputs Elevator stick Rudder stick The mx-12 HoTT transmitter software contains a large number of pre-programmed coupling functions as standard, designed to mix together two (or more) control channels. The mixer required in this example is supplied “ready-made” in the software, and just has to be activated in the “tail” line of the “Basic settings” menu in the form of “V-tail”. The software also includes three freely programmable linear mixers in the fixed-wing and helicopter programs, all of which can be used in each model memory. diff aile. diff flaps ail rudd ail flaps brak elev brak flap brak aile elev flap elev aile elev flap aile flap diff–red ––– ––– ––– ––– ––– ––– ––– ––– ––– ––– ––– (The display varies according to the information you have entered in the “Motor at Ch 1” and “Ail / Flap” lines in the “Basic settings” menu. The selection above shows the maximum number of options, and equates to the setting “No (motor)” and “2AIL 2FL”). The mx-12 HoTT transmitter’s program contains a series of pre-programmed coupling functions, and all you have to do is set the mixer ratios and (optionally) assign a switch. The number of pre-programmed mixer functions in the mixer list will vary according to the pre-set “model type” (tail type, number of wing servos, with or without motor - see the section starting on page 56). For example, if your model is not fitted with camber-changing flaps, and you have not entered any flap servos in the “Basic settings” menu, the software automatically suppresses all the flap mixers, as are the “Brake ¼ NN *“ mixers if you enter “Idle forward” or “Idle back” in the “Motor at Ch 1” line. This makes the menus clearer and easier to understand, and also avoids potential programming errors. 88 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% NN = Nomen Nominandum (name to be stated) Program description: wing mixers – fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs32:88 06.06.2011 19:39:40 Notes: • There are various alternative methods of positioning the camber-changing flaps; these include: a) settling on just one position per flight phase, simply by setting appropriate trim values in the “Phase trim” menu, as described on the preceding double-page; b) controlling the flaps manually using any transmitter control assigned to “Input 6” (in the “Transmitter control settings” menu - see page 74), after setting the basic flap positions in the “Phase trim” menu, as described earlier. Ideally the transmitter control would be one of the rotary proportional controls CTRL 7 or 8. The selected transmitter control directly operates the two flap servos connected to receiver outputs 6 and 1, assuming that you have specified flaps in the “Ail. / Flap” line of the “Basic settings” menu. The same control determines the flap setting of the ailerons via the percentage value entered in the “FL ¼ AIL” mixer line. However, for finer control of the flap positions, we recommend that you reduce their travel to about 25% in the “E6” line of the “Transmitter control settings” menu. c) It is also possible to leave the default setting of “0%” in the appropriate line of the “FL ¼ AIL” menu, and to assign the same transmitter control to both input 6 and input 5 in the “Transmitter control settings” menu. The magnitude of the effect on the two pairs of wing flaps can then be adjusted using the servo travel adjustment facility. • If the Ch 1 stick is assigned to input 1 as standard, it will be de-coupled by the software if two camber- changing flaps are defined; this is intentional, as it eliminates the danger of errors when a flap command is given. In this case the only type of brake function available is the Butterfly or Crow arrangement; see page 92. The basic programming procedure 1. Use the cd buttons of the left or right-hand fourway button to select the desired mixer. 2. Use the f button of the left or right-hand four-way button to move to the right-hand column, marked at the bottom edge of the by the switch symbol screen. 3. Press the central SET button of the right-hand fourway button; the corresponding input field is now highlighted (black background). 4. Use the arrow buttons of the right-hand four-way button to set the desired value, and assign the switch if necessary, as described on page 39. With the exception of the “Diff. red.” line, negative and positive parameter values are possible; this may be necessary to obtain the correct direction of servo rotation (control surface deflection). Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to the default value. 5. Press the central SET button of the right-hand fourway button to conclude the input process. Mixer neutral point The neutral point of the mixers … Aileron ¼ NN * Elevator ¼ NN * Elevator ¼ NN * (offset) … is by default the zero point of the transmitter control, i. e. that is the point at which they have no effect. At the end-point of the transmitter control the full mixer value is applied. The default neutral point (“offset”) of the mixers … Airbrake ¼ NN * … at which the airbrakes are always retracted, is the forward position of the Ch 1 stick (throttle / airbrakes) if you select “none” in the “Motor at Ch 1” line of the “Basic settings” menu, and is the back position of the Ch 1 stick if you select “none/inv”. diff aile (differential aileron travel) Aileron differential compensates for an unwanted sideeffect which occurs when ailerons are deflected: the problem known as “adverse yaw”. When ailerons are deflected, the drag generated by the down-going aileron is greater than that produced by the up-going aileron. The differential drag causes a yawing motion around the vertical axis in the opposite direction to the desired turn. This effect is much more pronounced in model gliders with high aspect ratio wings than in power models with their much shorter moment arms, and usually has to be countered by giving a simultaneous rudder deflection in the opposite direction to the yaw. However, this in turns causes additional drag and reduces the aircraft’s efficiency even further. Aileron differential reduces the angular travel of the down-going aileron relative to the up-going aileron, and this reduces the drag and therefore the adverse yaw. However, electronic differential can only be applied if each aileron is actuated by its own servo, usually mounted in the wings themselves. The shorter pushrods also result in virtually slop-free aileron linkages with NN = Nomen Nominandum (name to be stated) Program description: wing mixers – fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs32:89 89 06.06.2011 19:39:40 reliable centring. Mechanical solutions are also possible, but they usually have to be “designed in” when the model is built, and the degree of differential cannot be altered subsequently. In any case significant mechanical differential tends to cause additional slop in the control system. Electronic differential offers several important advantages: 0% (normal) 50% (differential) 100% (split) Note: Although it is possible to enter negative values in order to reverse the direction of servo rotation, this is not usually necessary if the correct channels are used. diff flaps (Camber-changing flap differential) The aileron / flap mixer (see below) is designed to superimpose an aileron function on the flaps. Flap differential works like aileron differential, and produces a reduced flap movement in the down-direction when these surfaces are used as supplementary ailerons. The adjustment range of -100% to +100% makes it possible to set the correct direction of differential regardless of the direction of rotation of the servo. “0%” corresponds to a normal linkage, i. e. the servo travel is the same up and down. A setting of “-100%” or “+100%” means that the down-travel of the flaps is reduced to zero when an aileron command is given (“split” setting). Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. Program description: wing mixers – fixed-wing model It is easily possible to vary the degree of differential without affecting the travel of the up-going aileron. At one extreme it is possible to suppress the down-aileron deflection completely, i. e. only the up-going aileron moves at all, and this arrangement is sometimes called the “split” setting. Split ailerons not only tend to suppress adverse yaw, but can even generate positive yaw, which means that the model yaws in the direction of the turn when an aileron command is given. In the case of large model gliders, smooth turns can then be flown using ailerons alone, which with most models of this type is usually by no means the case. The adjustment range of -100% to +100% makes it possible to set the correct direction of differential regardless of the direction of rotation of the aileron servos. “0%” 90 corresponds to a normal linkage, i. e. no differential, while “-100%” or “+100%” represents the “split” function. For aerobatic flying it is necessary to set low absolute differential values, to ensure that the model rotates exactly along its longitudinal axis when an aileron command is given. Moderate values around -50% or +50% are typical for making thermal turns easier to fly. The split setting (-100%, +100%) is popular with slope flyers, when ailerons alone are often used for turning the model. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. 33112_mx12_HoTT_2_GB.indd Abs32:90 Note: Negative values are not usually necessary if the correct channels are used. ail ¼ rudd (Aileron ¼ rudder) In this case the rudder automatically “follows” when an aileron command is given, and the mixer ratio (degree of following) can be set by the user. Coupled aileron / rudder (also known as “combi-switch”) is especially useful for suppressing adverse yaw in conjunction with aileron differential, and this combination usually makes smooth turns very easy to fly. Naturally, the rudder can still be controlled separately by means of its dedicated stick. The adjustment range of +/- 150% enables the user to set up the correct direction of travel according to the direction of rotation of the flap servos. If an (optional) non-centring switch (SW 3 … 7) is assigned to this function, the mixer can be turned on and off in flight, so that you can control the ailerons and rudder separately if and when you so desire. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. This mixer is usually set up in such a way that the rudder deflects automatically to the side of the up-going aileron; a setting around 50% is likely to be approximately correct. 06.06.2011 19:39:40 ail ¼ flaps (Aileron ¼ flap) brak ¼ elev (Airbrake ¼ elevator) brak ¼ flap (Airbrake ¼ flap) or This mixer feeds a variable amount of the aileron signal into the flap channel. When an aileron command is given, the flaps “follow” the ailerons, although usually through a smaller angle, i. e. the mixer ratio is generally less than 100%. The adjustment range of -150% to +150% allows the user to set up the flap direction to match that of the ailerons. The flaps should not deflect more than about 50% of the (mechanical) travel of the ailerons. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. Note: If your model is equipped with only one flap servo, you should still select “2FL” in the “aile/flap” line of the “Basic settings” menu (see page 58) but leave the “Ail ¼ Flap” mixer at 0%. In contrast, all the other wing mixers can be used in the usual way. Extending any form of airbrakes usually generates an unwanted change in airspeed; this is especially marked when a butterfly (crow) braking system is deployed (see next page). This mixer feeds a corrective signal to the elevator to compensate for such an effect. The adjustment range is -150% to +150%. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. “Usual” values are generally in single to low double figures. It is essential to check and adjust this setting at a safe height, and it is also important to ensure that the model does not slow down too much when the airbrakes are extended. The danger is that you might need to retract the brakes again on the landing approach when you realise the model will “land short”; if its airspeed is too low when you retract the brakes, the model will just fall to the ground at that point. When you operate the brake function (Ch 1 stick), both flap servos move together for the landing approach; the mixer ratio can be set to any value in the range -150% to +150%. Down-flap is usually selected. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. At this point you select the value which causes the flaps to deflect down as far as possible when the airbrake function is deployed. However, please ensure that none of the servos concerned strikes its mechanical endstops (servos stalled). To achieve this, you may need to limit the servo travel(s) using the “Travel -/+” option, which is found on the “RX SERVO” display page of the “Telemetry” menu. Program description: wing mixers – fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs32:91 91 06.06.2011 19:39:40 brak ¼ aile (Airbrake ¼ aileron) When you operate the brake function, both aileron servos move together for the landing approach; the mixer ratio can be set to any value in the range -150% to +150%. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. Note: It can also be useful to deflect both ailerons up slightly when the airbrakes are extended; in most cases this significantly reduces the risk of a tip-stall. Combination of the “Brake ¼ NN *” mixers: “Crow” or “Butterfly” setting If you have set up all three airbrake mixers for your model, it is then possible to program a special configuration known as the “crow” or “butterfly” arrangement for glide path control. In the butterfly setting both ailerons are deflected up by a moderate amount, and both flaps down by the maximum possible amount. The third mixer provides elevator trim to counteract any unwanted pitch trim change and maintain the model’s airspeed at a safe level. This is necessary to avoid the danger of the model slowing up excessively; if the landing approach is 92 started too soon, and has to be extended by retracting the airbrakes again, the model could then stall abruptly. This inter-action between the flaps, ailerons and elevator is used to control the glide angle on the landing approach. Optionally the butterfly setting can also be used without the airbrakes or spoilers; nowadays this is very commonly used for sports and competition aircraft. Note: If your model features full-span (strip) ailerons which also double as camber-changing flaps, the two mixers “Brake ¼ aileron” and “Brake ¼ elevator” can be combined for glide path control. In this case up-flap is applied, but the flaps can still be controlled as ailerons. Elevator pitch trim compensation is generally required. If you have programmed aileron differential, the response of the ailerons will inevitably be adversely affected by the extreme “up” deflection of the ailerons in the butterfly setting, because the differential travel reduces or entirely suppresses the down-aileron deflection. However, the “up” travel of the ailerons is also greatly restricted because they are already at or close to their “up” end-point. The remedy here is to apply “differential reduction”, which is explained in its own section later. NN = Nomen Nominandum (name to be stated) elev ¼ flap (Elevator ¼ flap) The flaps can be used to enhance the effect of the elevator in tight turns and aerobatics, and this mixer feeds part of the elevator signal to the flap servos. The mixer direction must be set so that the flaps move down when up-elevator is applied, and vice versa. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. The “usual” settings for this mixer are in the low two-digit range. elev ¼ aile (Elevator ¼ aileron) This mixer allows the ailerons to reinforce the elevator response in the same way as the previous mixer. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. The adjustment range is +/- 150%. For this mixer the Program description: wing mixers – fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs32:92 06.06.2011 19:39:40 “usual” settings are again in the low two-digit range. flap ¼ elev flap ¼ aile (Flap ¼ aileron) (Flap ¼ elevator) When the camber-changing flaps are lowered, either using “Phase trim” or by means of a transmitter control assigned to input “6”, a pitch trim change (up or down) may occur. Alternatively it may be desirable for slight down-elevator to be applied automatically when the flaps are raised by a small amount, in order to increase the model’s basic airspeed. This mixer can be used to achieve both purposes. When the flaps are deployed, this mixer causes the elevator setting to be corrected automatically in proportion to the flap deflection. The adjustment range is +/- 150%. For this mixer the “usual” settings are in the single to low two-digit range. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. This mixer causes a variable proportion of the flap signal to be mixed in with the aileron channels 2 and 5 so that the ailerons follow the movement of the flaps, albeit normally with a smaller deflection. The adjustment range is +/- 150%. For this mixer the “usual” settings are around 50%. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. Note: If you assign a transmitter control to inputs 5 and 6 in the “Transmitter control settings” menu for adjusting the flap positions, then you should leave the value for this mixer at 0%. See the notes on page 89 in this regard. diff red (Differential reduction) The problem of reduced aileron response in the butterfly configuration has been mentioned earlier: if aileron differential is employed, the aileron response on the landing approach may be adversely affected through the extreme “up” deflection of the ailerons, permitting virtually no further up-movement; on the other hand the “down” travel has already been reduced by the programmed differential setting. The overall result is significantly reduced aileron response compared with the normal setting of the control surfaces. In this case you really should use “differential reduction” if at all possible. This reduces the degree of aileron differential when you invoke the butterfly setting using the airbrake stick. Differential is reduced progressively, or even eliminated altogether, as the airbrake stick is moved towards its end-point. A value of 0% at this point means that the full programmed aileron differential is retained. A value of 100% means that the aileron differential is completely eliminated at the maximum butterfly setting, i. e. when the airbrakes and other glide path control surfaces are fully extended. If you set a value above 100%, the aileron differential is eliminated even before full travel of the airbrake stick is reached. The adjustment range is 0 to 150%. Simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR) resets an altered value to 0%. Program description: wing mixers – fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs32:93 93 06.06.2011 19:39:40 Helicopter mixers Flight phase-specific mixers for collective pitch, throttle and tail rotor In the “Basic settings” menu a method of switching flight phases can be activated by assigning the appropriate switches to “Phase 2” and / or “Auto-rotation”. You can then switch between the phases “normal” and a second phase - to which you can assign a more appropriate name yourself, if necessary - using one of the non-centring switches SW 3 … 7; a further switch then selects “Auto-rotation”. However, auto-rotation always has precedence over the other two phases; see pages 68 / 69. If you have not yet assigned switches for the flight phases, you should do so now. Use the arrow buttons of the left-hand four-way button to move to the right-hand symbol at the bottom column, marked by the switch of the screen, then press the central SET button of the right-hand four-way button. The switches are assigned as described on page 39: rotor direct pitch min timer phase 2 autorotat. right rear 10:01 C3 hover 5 Phase 1 always bears the designation “normal”. Both the number and name of this phase are permanently assigned, and cannot be altered. For this reason the “normal” phase is not stated as Phase 1 in the “Basic settings” menu; it is simply concealed. By default “Phase 2” is assigned the phase name “hover”, but you can change these at any time if you prefer: press the central SET button with the right-hand fourway button, and use the arrow buttons of the right-hand four-way button to select one of the following names: 94 • • • • • hover acro acro 3D speed test Description of the helicopter mixers Five-point curves are available for setting up the control characteristics of “collective pitch”, “Ch 1 ¼ throttle” and “Ch 1 ¼ tail rotor”. Using these curves it is possible to program non-linear mixer ratios along the travel of the transmitter stick for these mixers. Move to the display page for setting 5-point curves by pressing the central SET button of the right-hand four-way button (see below). In contrast, the mixers “Ch 1 ¼ throttle” and “Ch 1 ¼ tail rotor” are not required for the “Auto-rotation” flight phase (described in the section starting on page 104); instead they are automatically switched to a (user-variable) pre-defined value. A value must be entered in the “Gyro” line: press the central SET button of the right-hand four-way button, then enter a value in the highlighted field using the arrow buttons of the right-hand four-way button - in a similar fashion to changing the transmitter centre position or the offset position with other radio control systems. This set-up facility is rounded off with the “Swashplate limit” option: this restricts the maximum travel of the swashplate servos to the value you set, in the form of a limiter. All these options are required for the basic process of setting up a model helicopter. Altered parameters can be reset to the corresponding default values at any time by simultaneously pressing the cd or ef buttons of the right-hand four-way button (CLEAR). The name of the currently selected flight phase is displayed in the “Helicopter mixers” menu as well as in the transmitter’s basic display; this is designed to ensure that any changes you make actually apply to the appropriate flight phase. Note that the servos do not change from one setting to another abruptly; they move smoothly with a transition time of around one second. This does not apply to auto-rotation: when you switch INTO auto-rotation, the change takes place immediately. If you operate the switch selected for a particular flight phase, the associated flight phase is superimposed at the left-hand bottom edge of the screen, e. g. “normal”. ptch ch1 thro tail ch1 gyro swash lim. normal 0% off SEL Now you can program the settings for this flight phase. Basic programming procedure 1. Use the arrow buttons cd of the left or right-hand four-way button to select the desired option. 2. Press the central SET button of the right-hand fourway button, and the screen switches to the set-up page ( symbol at the bottom edge of the screen), or the corresponding input field is highlighted (black background). 3. Define the mixer values using the arrow buttons of the right-hand four-way button, moving the throttle / collective pitch stick at the same time if necessary. 4. Simultaneously pressing the cd or ef buttons of Program description: helicopter mixers – model helicopter 33112_mx12_HoTT_2_GB.indd Abs33:94 06.06.2011 19:39:41 the right-hand four-way button (CLEAR) resets an altered value to the default value. 5. Press the central SET button of the right-hand fourway button to conclude the input process. ptch (Collective pitch (ch1 ¼ pitch)) Select the “Collective pitch” line using the arrow buttons cd of the left or right-hand four-way button, then press the central SET button of the right-hand four-way button: ptch input output point 3 normal 0% 0% 0% The control curve can be based on a maximum of five nodes, known as “reference points”, which can be placed along the length of the control travel; separate curves can be programmed for each flight phase. However, in most cases it is sufficient to use a smaller number of reference points when defining the collective pitch curve. As a basic rule we recommend that you start with the three default reference points offered by the software. These three points, i. e. the two end-points “Point 1” (collective pitch minimum) and “Point 5” (collective pitch maximum), and “Point 3”, exactly in the centre of the travel, initially describe a linear characteristic for the collective pitch curve; this is represented in the picture above. The programming procedure in detail The throttle / collective pitch stick can now be used to move the vertical line in the graph between the two end-points “Point 1” and “Point 5”; at the same time the momentary position of the stick is displayed in numeric form in the “Input” line (-100% to +100%). The point where the vertical line crosses the curve is termed the “Output”, and this point can be varied within the range -125% and +125% at a maximum of five reference points. The control signal, modified in this way, affects the collective pitch servos only. In the picture on the left the stick is exactly at the 0% position at “Point 3”, and also generates an output signal of 0% due to the linear nature of the graph. By default only points “1” (collective pitch minimum at -100%), “3” (hover point at 0%) and “5” (collective pitch maximum at +100% travel) are active. To set a point you use the associated stick to move the vertical line to the point you wish to change. The number and current curve value of this point are displayed in the bottom line in the left-hand half of the screen in the “Point” line. The arrow buttons of the right-hand four-way button can now be used to change the current curve value in the highlighted field to any value within the range -125% to +125%, without affecting the adjacent points. +75%. However, the optional points “2” and “4” can also be activated. In the next example we activate point “2” at -50% … ptch input output point 2 normal –50% –12% deact … and point “4” at +50% … ptch input output point 4 normal +50% +88% deact This is accomplished using the stick to move the vertical line to the appropriate area. As soon as the message “inactive” appears in the highlighted value field, you can activate the associated point with the arrow buttons of the right-hand four-way button; it can then be adjusted in the same manner as the other points … ptch ptch input output point 3 normal input output point 4 normal 0% +75% +75% In this example we have moved reference point “3” to +50% –50% –50% … or reset to “inactive” by simultaneously pressing the cd or ef buttons of the right-hand four-way button Program description: helicopter mixers – model helicopter 33112_mx12_HoTT_2_GB.indd Abs33:95 95 06.06.2011 19:39:41 ch1 ¼ thro (CLEAR). Points “1” and “5”, however, CANNOT be disabled. ch1 Note: The following illustration, and all the other pictures on this page, show a control curve which we prepared for illustration purposes only. Please note that the curve characteristics by no means represent real collective pitch curves! input output point 3 normal ptch input output point 3 normal 0% –50% –50% Typical collective pitch curves for different flight phases: Output -100% -100% -100% 96 +100% Output +100% Output +100% Control travel Control travel Control travel Hover Aerobatics 3D (throttle curve) thro 0% 0% 0% Helicopter with glow engine or electric motor and STANDARD SPEED CONTROLLER This setting only affects the control curve of the throttle servo or speed controller. The method of setting up a throttle curve for a model helicopter fitted with a speed governor or regulator is discussed later. The throttle curve can be defined using up to five points, in a similar way to the collective pitch curve (see previous page). • In all cases the control curve must be set up in such a way that the throttle is fully open, or the speed controller of an electric helicopter is at full power, at the end-point of the throttle / collective pitch stick, (exception: auto-rotation - see page 104). • The hover point is normally located at the centre of the stick travel, and the throttle setting should be adjusted relative to the collective pitch curve in such a way that the correct system rotational speed is obtained at this point. • At the minimum position of the throttle / collective pitch stick the throttle curve should initially be set up so that the (glow) motor runs at a distinctly higher speed compared to the idle setting, with the clutch reliably engaged. In all flight phases the motor (glow or electric) is started and stopped using the throttle limiter (see below). If you are used to a different radio control system which uses two separate flight phases for this - “with idle-up” and “without idle-up”; therefore incurring the “loss” of one complete flight phase - please note that the throttle limiter renders this complication superfluous, as the increased system rotational speed below the hover point in the mx-12 HoTT program is more flexible, and can be fine-tuned more accurately, than the “idle-up” system used with earlier mc radio control systems. Ensure that the throttle limiter is closed before you start the glow motor, i. e. the throttle can only be adjusted within its idle range using the idle trim. Be sure to read the safety notes on page 102 which refer to this. If the idle is set too high when you switch the transmitter on, you will see and hear a clear warning! 0:00 STARLET stop throttle Flug #02 0:00 too «normal » HoTT 5.2V 99% high K78 5.5V 2:22h The following three diagrams show typical 3-point throttle curves for different flight phases, such as hover, aerobatics and 3-D flying. Program description: helicopter mixers – model helicopter 33112_mx12_HoTT_2_GB.indd Abs33:96 06.06.2011 19:39:41 Typical throttle curves for different flight phases: +100% Output Output +100% Output +100% -100% -100% -100% Control travel Hover Control travel Aerobatics Control travel 3D Notes on using the “Throttle limit” function: • We strongly recommend that you make use of the throttle limit function (“Transmitter control settings” menu, page 79). When you use this function the throttle servo is completely disconnected from the throttle / collective pitch stick when the proportional throttle limit control is at its left-hand end-point; the motor runs at idle and only responds to the Ch 1 trim. This feature enables you to start the motor from within any flight phase. Once the motor is running, turn the throttle limiter slowly to the opposite end-point, so that full control of the throttle servo is returned to the throttle / collective pitch stick. It is important that the throttle limiter should not restrict the throttle servo at its upper endpoint; you can avoid this by setting the control travel to +125% in the “Lim” line of the “Transmitter control settings” menu. • Since electric motors by their nature require no idle setting, the only important point when setting up an electric-powered model helicopter is that the adjustment range of the throttle limiter should be set significantly higher and lower than the adjustment range of the speed controller, which is usually from -100% to +100%. It may therefore be necessary to set the “Travel” value of the throttle limiter to an appropriate point 33112_mx12_HoTT_2_GB.indd Abs33:97 in the “Lim” line of the “Transmitter control settings” menu. However, the throttle curve itself has to be finetuned with the helicopter in flight, just like a glow-powered machine. • Releasing the full throttle range, and imposing the throttle limiter again, trips the switching threshold of the control switch “C3” (i. e. in either direction); this switch can be used for automatically starting and stopping the stopwatch to record the flight time, or some similar purpose; see page 39. When you select auto-rotation, the mixer automatically switches the value to a variable pre-set value; see the section starting on page 104. contrast to the usual socket sequence - and the throttle curve adjusted so that it can simply assume the role of the “usual” transmitter control. In this case the “throttle curve” only determines the nominal rotational speed of the speed controller, and this nominal value is required to remain constant over the full range of collective pitch; for this reason a horizontal line should be set in the “Ch 1 ¼ throttle” mixer, i. e. every (collective pitch) input value results in the same (“throttle”) output value. The “height” of the line in the graph determines the nominal system rotational speed. Initially, then, reference point “3” should be erased, and reference points “1” (input = -100%) and “5” (input = +100%) set to the same value; for example: Helicopter with speed GOVERNOR (REGULATOR) In contrast to speed controllers, which simply adjust powthro ch1 er output in the same way as a carburettor, speed goverinput –100% nors maintain a constant rotational speed in the system output +30% which they regulate; they accomplish this by adjusting the point 1 +30% power output as required. In the case of a glow-powered normal helicopter the governor automatically controls the throttle servo; in an electric-powered machine the governor does the same with the speed controller. For this reason speed The value to be set varies according to the speed governor you are using, and also to the desired nominal governors do not require a classic throttle curve; they rotational speed; you may wish to vary it, of course, in the just need a pre-set rotational speed. Once this is set, the various flight phases. system rotational speed does not alter unless the system When you select auto-rotation, the mixer automaticalls for more power from the motor than is available. cally switches the value to a variable pre-set value; Connect your speed governor to receiver output 6 see the section starting on page 104. instead of the throttle servo, and adjust the throttle curve as described in the following section. This ensures that the throttle curve can assume the role of the “usual” transmitter control. However, if you wish to be able to exploit the convenience and safety features of the throttle limiter, the speed governor should be connected to receiver output 6 - in Program description: helicopter mixers – model helicopter 97 06.06.2011 19:39:41 Ch1 ¼ tail rotor Ch1 (static torque compensation) tail input output point 3 normal input output point 3 normal 0% 0% 0% The default setting is a torque compensation curve with a uniform linear mixer input of 0%, as is required for a gyro sensor operating in “heading lock mode”; see illustration above. Important Note: It is absolutely essential to read and observe the set-up instructions supplied with your gyro before entering any settings at this point, as a mistake here could render your helicopter uncontrollable. If you use your gyro sensor in “normal” operating mode, or if the gyro only offers “normal mode”, then you should set up the mixer as follows: The tail rotor control curve can be defined using up to five points, in a similar way to the collective pitch curve (see previous page). You can therefore modify the mixer at any time when required, and enter symmetrical or asymmetrical mixer inputs both above and below the hover point. However, please ensure at the outset that you have entered the correct direction of main rotor rotation in the “Basic settings” menu. 98 CH1 tail 0% 0% 0% Starting from -30% at Point 1 and +30% at Point 5, this mixer should be set up in such a way that the helicopter does not rotate around the vertical (yaw) axis (i. e. does not deviate from the hover heading) during a long vertical climb or descent, due to the change in torque of the main rotor. At the hover the yaw trim should be set using the (digital) tail rotor trim lever only. For a reliable torque compensation setting it is essential that the collective pitch and throttle curves have been set up correctly, i. e. that main rotor speed remains constant over the full range of collective pitch. When you select auto-rotation, this mixer is automatically switched off. Gyro (adjusting gyro gain) Most modern gyro systems feature proportional, infinitely variable adjustment of gyro gain as well as a means of selecting either of two different methods of working from the transmitter. If the gyro you wish to use features at least one of these options, then it offers you the possibility of pre-setting both “normal” gyro effect and - if available - “heading lock mode”, and also of flying normal, slow circuits with maximum gyro stabilisation, but reducing the gyro effect for high-speed circuits and aerobatics. This is generally similar to the transmitter control centre adjustment or offset adjustment provided by other radio control sys- tems. We recommend that you set up switchable flight phases for this, and set different gain settings for each phase in the “Gyro” line; values between -125% and +125% are possible. ptch ch1 thro tail ch1 gyro swash lim. normal 0% off SEL Based on the offset values determined for each flight phase, gyro gain can be varied proportionally by means of a transmitter control assigned in the “Gyro” line of the “Transmitter control settings” menu (see page 78). This could be CTRL 8, which would provide infinitely variable gyro gain control: • At the centre position of this transmitter control the gyro effect always corresponds to the settings selected here. • If you turn the rotary proportional control CTRL 8, which we are using in our example, in the direction of full travel (away from centre), the gyro gain increases accordingly … • … and diminishes again if you turn it in the direction of the opposite end-point. Important Note: It is absolutely essential to read and observe the set-up instructions supplied with your gyro before entering any settings at this point, as a mistake here could render your helicopter uncontrollable. Program description: helicopter mixers – model helicopter 33112_mx12_HoTT_2_GB.indd Abs33:98 06.06.2011 19:39:41 Adjusting the gyro sensor If you wish to set up a gyro to achieve maximum possible stabilisation of the helicopter around the vertical axis, please note the following points: • The mechanical control system should be as freemoving and accurate (slop-free) as possible. • There should be no “spring” or “give” in the tail rotor linkage. • You must use a powerful and - above all - fast servo for the tail rotor. When the gyro sensor detects a deviation in yaw, the faster it adjusts the thrust of the tail rotor, the further the gyro gain adjuster can be advanced without the tail of the model starting to oscillate, and the better the machine’s stability around the vertical axis. If the corrective system is not fast enough, there is a danger that the model’s tail will start to oscillate even at low gyro gain settings, and you then have to reduce gyro gain further using the rotary proportional control CTRL 8, as used in our example, to adjust the pre-set “Gyro” value to eliminate the oscillation. If the model is flying forward at high speed, or hovering in a powerful headwind, the net result of the stabilising effect of the vertical fin combined with the gyro’s stabilising effect may be an over-reaction which manifests itself as tail oscillation. In order to obtain optimum stabilisation from a gyro in all flight situations, you should make use of the facility to adjust gyro gain from the transmitter. Swashplate limiter ptch ch1 thro tail ch1 gyro swash lim. normal 0% off SEL This function acts like a circular mechanical gate acting upon the swashplate control stick, restricting its range of travel - which is usually rectangular - to a circular pattern. This is designed to solve the following problem: if the helicopter is set up in such a way that the roll and pitch-axis travels extend to the maximum possible in mechanical terms, e. g. for 3-D helicopter flying, then at simultaneous full travel of roll and pitch-axis the actual movement of the swashplate is higher (theoretically 141%). In this situation the mechanical swashplate system may strike its end-stops, and in the extreme case the ball-links may even be forced off the linkage balls. In the mx-12 HoTT transmitter a software function has the effect of limiting the overall swashplate travel, i. e. the tilt angle of the swashplate between 100% (the travel is limited to the value which can be reached by one function - roll or pitch-axis - alone) and 149% (no limiting in force) is switched “off” (the function is completely disabled). Swashplate limiting can also be adjusted to suit individual models and flight phases. This software solution is far more flexible than a physical limiter disc attached to the stick unit, and such a disc can only be used in any case if the roll and pitch-axis functions are controlled by one of the two primary sticks. The sketch alongside shows the effect of the limiter at a setting of 100%: the dotted area of travel is cut off, and appears as a dead zone. If this function is used, you should leave “Dual Rate” at 100%, and you should not set Dual Rate values greater than 100%, otherwise travel will be limited on the roll or pitch-axis individually if the swashplate limiter is set to 100%. Adjustment range: 100 ... 149% and “off”. Program description: helicopter mixers – model helicopter 33112_mx12_HoTT_2_GB.indd Abs33:99 99 06.06.2011 19:39:41 Adjusting the throttle and collective pitch curves A practical procedure Note: The hover point should always be set to the centre position of the throttle / collective pitch stick. Idle setting and throttle curve Note: Since electric power systems by their nature require no idle setting, it is not necessary to adjust the idle value. However, the matching of the throttle and collective pitch curve(s) must still be carried out as described here, in a similar way to a glow-powered helicopter. The idle setting is adjusted solely using the trim lever of the Ch 1 function, with the throttle limiter closed, as described in detail on pages 79 to 80. Reference point 1 of the throttle curve defines the throttle setting when the helicopter is in a descent, but without affecting the hover setting. This is a case where you can exploit flight phase programming to use different throttle curves. An increased system rotational speed below the hover point proves to be useful in certain circumstances; for example, for fast, steep landing approaches with greatly reduced collective pitch, and for aerobatics. +100% The diagram shows a curve with a slightly altered throttle setting below the hover point at the centre of stick travel. OUTPUT Although the throttle and collective pitch control systems are based on separate servos, they are always operated in parallel by the throttle / collective pitch stick (except when auto-rotation is invoked). The Helicopter program automatically couples the functions in the required way. In the mx-12 HoTT program the trim lever of control function 1 only affects the throttle servo, i. e. it acts as idle trim (see “Digital trims” on page 40). The process of adjusting “throttle” and collective pitch correctly, i. e. setting the motor’s power curve to match the collective pitch setting of the main rotor blades, is the most important aspect of setting up any model helicopter. The program of the mx-12 HoTT provides independent adjustment facilities for the throttle, collective pitch and torque compensation curves. These curves can be defined using a maximum of five reference points. To define the control curves all you have to do is set individual values for these five points in order to determine each control curve. However, before you set up the throttle / collective pitch function it is important to adjust the mechanical linkages to all the servos accurately, in accordance with the setup notes provided by the helicopter manufacturer. -100% Control travel Different throttle curves are programmed for each flight phase, so that you can use the optimum set-up both for hovering and aerobatics: • Low system rotational speed with smooth, gentle control response and low noise at the hover. • Higher speed for aerobatics with motor power settings close to maximum. In this case the throttle curve also has to be adjusted in the hover range. The basic set-up procedure Although the mx-12 HoTT transmitter provides a broad range of adjustment for the collective pitch and throttle curves, it is essential that you first adjust all the mechanical linkages in the model according to the information supplied by the helicopter manufacturer, i. e. all the system linkages should already be approximately correct in mechanical terms. If you are not sure of how to do this, any experienced helicopter pilot will be glad to help you with the basic set-up. The throttle linkage must be adjusted in such a way that the throttle is just at the “fully open” position at the full-throttle setting, or the speed controller of an electric helicopter is set to full-power. When the throttle limiter is at the idle position, the Ch 1 trim lever should just be able to close the throttle completely, without the servo striking its mechanical end-stop (quick throttle adjustment using the “digital trim”: see page 40). With an electric helicopter the motor should stop reliably when the throttle limiter is closed. Take your time, and carry out these adjustments very carefully by adjusting the mechanical linkage and / or changing the linkage point on the servo output arm or the throttle lever. Only when you are confident that all is well should you think about fine-tuning the throttle servo using the transmitter’s electronic facilities. Caution: Read all you can about motors and helicopters, so that you are aware of the inherent dangers and the cautionary measures required before you attempt to start the motor for the first time! With the basic set-up completed, it should be possible to start the motor in accordance with the operating instructions supplied with it, and adjust the idle setting using the trim lever of the throttle / collective pitch stick. The idle position which you set is indicated in the transmitter’s basic screen display by a horizontal bar in the display of the Ch 1 trim lever’s position. Refer to page 40 100 Program description: helicopter mixers – model helicopter 33112_mx12_HoTT_2_GB.indd Abs33:100 06.06.2011 19:39:41 3 OUTPUT OUTPUT +100% Hover point -100% Control travel 2. The model lifts off below the centre point. +100% OUTPUT a) Rotational speed too high Remedy: on the “Ch 1 ¼ throttle” graphic page, reduce the throttle opening by reducing the value at Point 3. Hover point -100% Control travel +100% Control travel Important: It is important to persevere with this adjustment procedure until the model hovers at the correct rotational speed at the centre point of the throttle / collective pitch stick. All the other model settings depend upon the correct setting of these parameters! -100% b) Rotational speed too high Remedy: on the “Collective pitch” graphic page, increase the blade pitch angle for collective pitch by increasing the value at Point 3. Control travel Hover point Hover point already fully open and no further power increase is possible (this assumes that the motor is correctly adjusted), then you should reduce the maximum blade pitch angle at full deflection of the collective pitch stick, i. e. the value at Point 5. Conversely, if motor speed rises during the vertical climb, you should increase the pitch angle. This is done on the “Collective pitch” graphic page by moving the vertical line to Point 5 using the collective pitch stick, and changing its value accordingly using the arrow buttons cd of the right-hand four-way button. OUTPUT +100% +100% -100% 1. The model does not lift off until the collective pitch stick is above the centre point. a) Rotational speed too low Remedy: on the “Ch 1 ¼ throttle” graphic page, increase the value at Point 3. b) Rotational speed too low Remedy: on the “Collective pitch” graphic page, reduce the blade pitch angle by reducing the value at Point 3. OUTPUT of this manual for a full explanation of the digital trims. Around the mid-point of the collective pitch stick the model should lift off the ground and hover at approximately the rotational speed you wish to use. If this is not the case, correct the settings as follows: The standard set-up The remainder of the standard adjustment procedure is completed on the basis of the fundamental set-up which you have just carried out, i. e. we now assume that the model hovers in normal flight at the centre point of the throttle / collective pitch stick, with the correct rotor speed. This means that your model helicopter is capable of hovering and also flying circuits in all phases whilst maintaining a constant system rotational speed. The climb setting The combination of throttle hover setting, collective pitch setting for the hover and the maximum collective pitch setting (Point 5) now provides you with a simple method of achieving constant system rotational speed from the hover right to maximum climb. Start by placing the model in an extended vertical climb, holding the collective pitch stick at its end-point: motor speed should not alter compared with the hover setting. If motor speed falls off in the climb, when the throttle is This diagram shows the changes to the collective pitch maximum value only. Hover point -100% Control travel Now bring the model back to the hover, which again should coincide with the mid-point of the Ch 1 stick. If you find that the collective pitch stick now has to be moved from the mid-point in the direction of “higher”, then you should correct this deviation by slightly increasing the collective pitch angle at the hover - i. e. Point 3 - until the model again hovers at the stick centre point. Conversely, if the model hovers below the mid-point, correct this by reducing the pitch angle once more. You may find that it is also necessary to correct the throttle opening at the hover point (Point 3) in the “Ch 1 ¼ throttle” menu. Program description: helicopter mixers – model helicopter 101 33112_mx12_HoTT_2_GB.indd Abs33:101 06.06.2011 19:39:41 This diagram only shows the change in the hover point, i. e. collective pitch minimum and maximum have been left at -100% and +100% respectively. OUTPUT +100% -100% Control travel Continue adjusting these settings until you really do achieve constant main rotor speed over the full control range between hover and climb. The descent adjustment should now be carried out from a safe height by fully reducing collective pitch to place the model in a descent from forward flight; adjust the collective pitch minimum value (Point 1) so that the model descends at an angle of 60 … 80°. This is done on the “Collective pitch” graphic page by moving the vertical line to Point 1 using the collective pitch stick, and adjusting the value accordingly using the arrow buttons of the right-hand four-way button. OUTPUT +100% As an example, this diagram shows the changes in the collective pitch minimum value only. Hover point -100% Control travel Once the model descends reliably as described, adjust the value for “Throttle minimum” - the value of Point 1 on the graph of the “Ch 1 ¼ throttle” mixer - so that system rotational speed neither increases nor declines. This completes the set-up procedure for throttle and collective pitch. Important final notes Before you start the motor, check carefully that the throttle limiter is completely closed, so that the throttle can be controlled by the Ch 1 trim lever alone. If the throttle is too far open when you switch the transmitter on, you will see and hear a warning. If you ignore this and start the motor with the throttle too far advanced, there is a danger that the motor will immediately run up to speed after starting, and the centrifugal clutch will at once engage. For this reason you should: always grasp the rotor head firmly when starting the motor. However, if you accidentally start the motor with the throttle open, the rule is this: Don’t panic! Hang on to the rotor head regardless! Don’t let go! Immediately reduce the throttle limiter, even though there may be a risk of damaging the helicopter’s drive train, because: it is vital that YOU ensure that the helicopter cannot possibly move off by itself in an uncontrolled manner. The cost of repairing a clutch, a gearbox or even the motor itself is negligible compared with the damage which a model helicopter can cause if its spinning rotor blades are allowed to wreak havoc. Make sure that nobody else is standing in the primary hazard zone around the helicopter. You must never switch abruptly from idle to the flight setting by suddenly increasing system rotational speed, as this would cause the rotor to accelerate quickly, resulting in premature wear of the clutch and gear train. The main rotor blades are generally free to swivel, and they may be unable to keep pace with such swift acceleration, in which case they might respond by swinging far out of their normal position, perhaps resulting in a boom strike. Once the motor is running, you should s l o w l y increase system rotational speed using the throttle limiter. 102 Program description: helicopter mixers – model helicopter 33112_mx12_HoTT_2_GB.indd Abs33:102 06.06.2011 19:39:41 For your notes 103 33112_mx12_HoTT_2_GB.indd Abs34:103 06.06.2011 19:39:41 Helicopter mixers Auto-rotation settings Auto-rotation allows full-size and model helicopters to land safely in a crisis, i. e. if the power plant should fail. It can also be used if the tail rotor should fail, in which case cutting the motor and carrying out an auto-rotation landing is the only possible way of avoiding a highspeed uncontrollable rotation around the vertical axis, invariably terminating in a catastrophic crash. And that is the reason why switching INTO auto-rotation occurs with zero delay. When you switch to the auto-rotation phase the helicopter mixers change as shown in this screen shot: ptch thro tail gyro swash lim. Autorot –90% 0% 0% off SEL During an auto-rotation descent the main rotor is not driven by the motor; it is kept spinning only by the airflow through the rotor disc caused by the speed of the descent. The rotational energy stored in the still spinning rotor can be consumed to allow the machine to flare out, but this can only be done once. For this reason “autos” are only likely to be successful if the pilot has plenty of experience in handling model helicopters, and has also set up the appropriate functions with great care. Once you have sufficient experience you should practise auto-rotation landings at regular intervals, not only so that you can demonstrate your all-round flying skill by flying the manoeuvre in competitions, but also so that you are in a position to land the helicopter undamaged from a great height if the motor should fail. For this purpose the program provides a range of adjustment fa- cilities which are designed to help you fly your helicopter in its unpowered state. Please note that the auto-rotation setting takes the form of a complete fourth flight phase, for which all the adjustment facilities are available which can be varied separately for all flight phases, especially trims, collective pitch curve settings etc. ptch (Collective pitch curve (Ch1 ¼ pitch)) In powered flight the maximum blade pitch angle is limited by the motor power which is available; however, in auto-rotation the angle is only limited by the point at which the airflow over the main rotor blades breaks away. Nevertheless, to provide sufficient upthrust even when rotational speed is falling off, it is necessary to set a greater maximum collective pitch value. Press the central SET button of the right-hand four-way button to select the graph page of “Collective pitch”, and then move the vertical line to Point 5 using the transmitter stick. Start by setting a value which is about 10 to 20% higher than your normal collective pitch maximum. Do NOT set a much higher value compared with normal flight initially, because collective pitch control will then differ too greatly from the machine’s usual response after you have thrown the switch. The danger is that you will over-control the helicopter, and it may balloon up again during the flare following the auto-rotation descent. If this happens, the rotational speed of the main rotor will quickly decline to the point where it collapses, and the helicopter ends up crashing to the ground from a considerable height. Later, after a few trial autos, you may wish to adjust the value again. Under certain circumstances the collective pitch minimum setting may also differ from the normal flight setting; this depends on your piloting style for normal flying. In any case you must set a sufficiently generous collec- tive pitch minimum value at Point 1 to ensure that your model can be brought from forward flight at moderate speed into a descent of around 60 ... 70° when collective pitch is reduced to minimum. Most helicopter pilots already use such a setting for normal flying, and if this applies to you, you can simply adopt the same value. If you normally allow your model to “fall” at a shallower angle, increase the value for “Point 1”, and vice versa. Approach angle in strong wind in moderate wind no wind Approach angle under varying wind conditions. 75° 60° 45° For auto-rotation the collective pitch stick itself may not be positioned right at the bottom of its travel; typically it will be between the hover position and the bottom endpoint, giving the pilot scope for correction if necessary, i. e. the chance to adjust the model’s pitch inclination using the pitch-axis control. You can shorten the approach by pulling back slightly on the pitch-axis stick and gently reducing collective pitch, or alternatively extend the approach by pushing forward on the pitch-axis stick and gently increasing collective pitch. Throttle (throttle curve) In a competition the pilot is expected to cut the motor completely, but for practice purposes this is certainly inconvenient, as after every practice “auto” landing you would have to start the motor again. 104 Program description: helicopter mixers / auto-rotation settings 33112_mx12_HoTT_2_GB.indd Abs35:104 06.06.2011 19:39:41 For practice, then, you should set the value in this line so that the motor runs at a reliable idle during autorotation, but without the clutch engaging, so that you can open the throttle immediately to recover from an emergency; for an electric helicopter the motor should be reliably “off”. Tail rotor (static torque compensation) For normal flying the tail rotor is set up in such a way that it compensates for motor torque when the helicopter is hovering. This means that it already generates a certain amount of thrust even in its neutral position. The level of thrust is then varied by the tail rotor control system, and also by the various mixers which provide all manner of torque compensation, while the tail rotor trim is also used to compensate for varying weather conditions, fluctuations in system rotational speed and other influences. However, in an auto-rotation descent the main rotor spins according to the windmill principle, i. e. it is not driven by the motor, and therefore there is no torque effect for which compensation is required, i. e. which the tail rotor would have to correct. For this reason all the appropriate mixers are automatically switched off in auto-rotation mode. However, the basic tail rotor setting therefore has to be different for auto-rotation, as the compensatory thrust described above is no longer required: Stop the motor and place the helicopter horizontal on the ground. With the transmitter and receiving system switched on, select the “Auto-rotation” flight phase. Fold both tail rotor blades down and change the blade pitch angle to zero degrees in the “Tail rotor” line. Viewed from the rear, the tail rotor blades should now lie parallel to each other. Depending on the friction and running resistance of the gearbox, you may find that the fuselage still yaws slightly in an auto-rotation descent. If necessary, the relatively slight torque which causes this effect must then be corrected by adjusting the tail rotor blade pitch angle. This value will always be a small figure between zero degrees and a pitch angle opposed to the direction of tail rotor pitch required for normal flight. Program description: helicopter mixers / auto-rotation settings 105 33112_mx12_HoTT_2_GB.indd Abs35:105 06.06.2011 19:39:41 General notes regarding freely programmable mixers The two menus “Fixed-wing mixers” and “Helicopter mixers”, as described on the preceding pages, contain a wide range of ready-programmed coupling functions. The basic meaning of mixers has already been explained on page 88, together with the principle on which they work. In the following section you will find information relating to “free mixers”: In addition to the pre-programmed mixers mentioned above, the mx-12 HoTT offers three freely programmable linear mixers which can be used in every model memory; their inputs and outputs can be selected to suit your exact requirements. Any control function (1 to 6), or what is known as a “switch channel” (see below), can be assigned as the input signal of a “free mixer”. The signal present at the control channel, and passed to the mixer input, is determined by the transmitter control and any control characteristics as defined, for example, in the “D/R Expo” and “Transmitter control settings” menus. The mixer output acts upon a freely selectable control channel (1 to max. 6 - depending on receiver type). Before the signal is passed to the associated servo, the only influences which can act upon it are those defined in the “Servo settings” menu, i. e. the servo reverse, centre and travel functions. One control function can be set up to affect several mixer inputs simultaneously, if, for example, you wish to arrange several mixers to operate in parallel. Conversely it is possible for several mixer outputs to affect one and the same control channel. The following description of the free mixers includes examples of such arrangements. In software terms the default setting for any “free mixer” is that it is constantly switched on, but it is also possible to assign an optional ON / OFF switch to it. However, since there are so many functions to which switches can potentially be assigned, you should take care not to assign dual functions to particular switches accidentally. The two important mixer parameters are as follows: • … the mixer ratio, which defines the extent to which the input signal acts on the output of the control channel which is programmed as the mixer output. • … the neutral point, which is also termed the “offset”. The offset is that point on the travel of a transmitter control (stick, rotary proportional knob CTRL 7 or 8 and SW 1, 3 … 7) at which the mixer has no influence on the control channel connected to its output. Normally this is the centre point of the transmitter control, but the offset can be placed at any point on the control’s travel. Switch channel “S” as mixer input In some cases a constant control signal is all that is required as the mixer output; a typical application would be for slight up-elevator trim when an aero-tow coupling is closed - completely independently of the normal elevator trim. If you then assign a switch, you can switch to and fro between the two mixer end-points, and adjust the supplementary elevator trim deflection by altering the mixer ratio. To identify this special arrangement, this mixer input control function is designated “S” for “switch channel” in the software. If you do not want the “target channel” to be affected by the “normal” transmitter control, the control can be de-coupled from the function input of the associated control channel by entering “free” in the “Transmitter control settings” menu; see pages 74 and 76. The following menu description again includes an example which makes this function clear. Now use the arrow buttons of the left or right-hand fourway button to leaf through to the “Free mixers” menu point of the multi-function menu: mod. mem. ser vo set. D/R expo wing mixer ser vo disp fail-safe base sett. contr set. phase trim free mixer basic sett telemetr y mod. mem. ser vo set. D/R expo free mixer ser vo disp fail-safe base sett. contr set. heli mixer swashp.mix basic sett telemetr y Press the central SET button of the right-hand four-way button to open this menu point. 106 Program description: free mixers 33112_mx12_HoTT_2_GB.indd Abs36:106 06.06.2011 19:39:41 Free mixers Linear mixers Regardless of the selected model type, three linear mixers are available for each of the ten model memories, with the additional possibility of setting up non-linear characteristic curves. In this first section we will concentrate on the programming procedure for the first screen page. We will then move on to the method of programming mixer ratios, as found on the second screen page of this menu. The basic programming procedure 1. Use the arrow buttons cd of the left or right-hand four-way button to select the desired mixer. 2. Press the central SET button of the right-hand fourway button: the input field in the column marked “fro(m)” at the bottom edge of the screen is now highlighted (black background). 3. Use the arrow buttons of the right-hand four-way button to define the mixer input “fro(m)”. 4. Press the central SET button of the right-hand fourway button; switch to the “to” column using the f button of the left or right-hand four-way button, then press the central SET button of the right-hand fourway button once more: the input field “to” is now highlighted. 5. Use the arrow buttons of the right-hand four-way button to define the mixer input “to”. 6. Press the central SET button of the right-hand fourway button, and (optionally) use the e button of the left or right-hand four-way button to move to the column marked “Type” at the bottom edge of the screen; you can now include the Ch1 … Ch 4 trim lever for the mixer input signal (“Tr” for trim) … 7. … and / or use the f arrow button of the left or righthand four-way button to move to the column marked 33112_mx12_HoTT_2_GB.indd Abs36:107 with the switch symbol at the bottom edge of the screen, press the central SET button of the righthand four-way button again, and assign a switch if desired, as described on page 39. 8. Use the arrow button f of the left or right-hand fourway button to move to the => column, then press the central SET button of the right-hand four-way button. 9. Define the mixer ratios on the second screen page. 10.Press the central ESC button of the left-hand fourway button to switch back to the first page. “fro(m)” After briefly pressing the central SET button of the righthand four-way button, select the highlighted field of the selected mixer line using the arrow buttons of the same four-way button, and select one of the control functions 1 … 6 or S. In the interests of clarity, the control functions 1 … 4 are abbreviated as follows when dealing with the fixed-wing mixers: c1 Throttle / airbrake stick ar Aileron stick el Elevator stick rd Rudder stick Note: If you have selected the supplementary control functions, don’t forget to assign transmitter controls to the selected control functions 5 and / or 6 for a fixed-wing model, or 5 for a model helicopter, in the “Transmitter control settings” menu. “S” for switch channel The letter “S” (switch channel) in the “from” column has the effect of passing a constant input signal to the mixer input, e. g. in order to apply a little extra up-elevator trim when an aero-tow coupling is closed, as mentioned earlier. Once you have assigned a control function or the letter “S” in the “from” column, an additional … “to” … appears at the bottom edge of the screen. In the input field of this column you can define the control channel as the mixer destination, i. e. the mixer output. At the same time additional fields appear at the bottom line of the screen: M1 M2 M3 c1 el el el fro to c1 … and in the Heli program: Throttle / collective pitch stick Roll stick Pitch-axis stick Tail rotor stick typ In this example three mixers have already been defined. The second mixer (“Brake ¼ el”) is already familiar to us from the “Fixed-wing mixers” menu. As a general rule you should always start by using these pre-programmed mixers if possible. However, if you need asymmetrical mixer ratios on both Program description: free mixers 107 06.06.2011 19:39:42 sides of centre, or have to offset the mixer neutral point, then you should set or leave the pre-set mixers at “0”, and program one of the free mixers instead. ies according to the function which has been assigned to it in the “Basic settings” menu (pages 56 and 64) in the “Motor at Ch 1” column for fixed-wing models. Erasing mixers If you need to erase a mixer that you have already defined, use the arrow buttons cd of the left or righthand four-way button to select its line, then use the arrow buttons ef to move to the “from” column before pressing the central SET button of the right-hand fourway button. The field in the “from” column of the mixer to be erased is now highlighted: simultaneously press the two arrow buttons cd or ef of the right-hand fourway button (CLEAR). Additional special features of free mixers If you set up a mixer whose input is the same as its output, e. g. “c1 ¼ c1”, exotic results can be obtained in conjunction with the option of switching a free mixer on and off. You will find one typical example of this on pages 152 … 154. Before we come to setting mixer ratios, we have to consider what happens if a mixer input is allowed to act on the pre-set coupling of aileron servos, flap servos or collective pitch servos: • Fixed-wing models: Depending on the number of wing servos set in the “Aileron / Flap” line of the “Basic settings” menu, receiver outputs 2 and 5 are reserved for the aileron servos, and outputs 6 and 1 for the two flap servos, as special mixers are assigned to these functions. If mixer outputs are programmed to this type of coupled function, you have to consider their effect on the associated pair of wing flaps, according to the “receiving” control channel: Mixer switches In our example above, a physical switch “5” and the control switch “C1” have been assigned to the two linear mixers 1 and 2, and switch “3” to mixer 3. The switch symbol to the right of the switch number shows the current status of that switch. Any mixer to which no switch has been assigned in the column marked by the switch symbol at the bottom of the screen is permanently switched on. “Type” (including the trim) If you wish, and if you are using one of the primary control functions 1 … 4, you can set the trim value of the digital trim lever for the associated stick to affect the mixer input. This is accomplished by pressing the central SET button of the right-hand four-way button, then using its arrow buttons to select “Tr” in the highlighted field. Note: The effect of the Ch 1 trim lever on the mixer output var- Mixer Wirkung NN * ¼ 2 Servo pair 2 + 5 responds with aileron function NN * ¼ 5 Servo pair 2 + 5 responds with flap function NN * ¼ 6 Servo pair 6 + 1 responds with flap function NN = Nomen Nominandum (name to be stated) NN * ¼ 1 Servo pair 6 + 1 responds with aileron function • Model helicopters: Depending on the type of helicopter, up to four servos may be employed for collective pitch control; these will be connected to receiver outputs 1, 2, 3 and 5. The transmitter software links them together to provide the functions collective pitch, roll and pitchaxis. It is not advisable to mix one of the transmitter controls into these occupied channels using the free mixers available outside the “Heli mixers” menu, as you may inadvertently generate some extremely complex and unwanted interactions. “Collective pitch trim via a separate transmitter control” counts as one of the few exceptions to this rule; see example 2 at page 111. Important note: When dealing with the interaction of multiple mixers on one control channel, it is essential to remember that the mixed travels of the individual mixers are cumulative when multiple stick commands are made simultaneously, and this brings a danger that the servo concerned may strike its mechanical endstops. If you encounter this problem, simply reduce the servo travel in the “Servo settings” menu, and / or reduce the mixer values. However, if you do not wish to reduce the travels in this way, because this method would unnecessarily reduce the control travels you normally use, then you may prefer an alternative method of preventing the servos striking their end-stops: set a suitable travel limit in the “TRAVEL -/+” lines of the “RX SERVO” display page of the “Telemetry” menu. 108 Program description: free mixers 33112_mx12_HoTT_2_GB.indd Abs36:108 06.06.2011 19:39:42 Mixer ratios and mixer neutral point Now that we have explained the wide-ranging nature of the mixer functions, we can move on to the method of programming linear and non-linear mixer curves. For each of the three available mixers the mixer curves are programmed on a second page of the screen display. Use the arrow buttons cd of the left or righthand four-way button to select the desired mixer line, use its arrow buttons to move to the right-hand column (=>), then press the central SET button of the right-hand four-way button to switch to the graphic page. Setting up linear mixer values In the next section we will describe a typical practical application, by defining a linear mixer curve intended to solve the following problem: We have a powered model with two flap servos connected to receiver output 6 using a Y-lead. These control surfaces are to be employed as landing flaps, i. e. when the associated transmitter control is operated, they deflect down only. However, this flap movement requires an elevator trim correction to counteract the resultant pitch trim change. In the “Transmitter control settings” menu, assign the rotary proportional control CTRL 7 (for example) to input 6. “Transmitter control settings” menu I5 free +100% +100% I6 ctrl 7 +100% +100% tr v Start by rotating the transmitter control to its left-hand end-point, and adjust the landing flap linkages so that they are in the neutral (retracted) position at this setting. If you now turn the knob to the right, the flaps should deflect down; if they move up, you must reverse the direction of servo rotation. Now we turn to the first mixer on the screen on page 107; this is the mixer “6 ¼ el”, to which switch 5 has been assigned: M1 M2 M3 typ c1 el el el fro to c1 Press the central SET button of the right-hand four-way button to open the second screen page: MIX1 el off MIX1 tr v offs el 0% 0% 0% SYM ASY The full-height vertical line in the graph represents the current position of the transmitter control assigned to input 6. (In the above graph this is located at the lefthand edge because CTRL 7 is at its left-hand end-point, as already mentioned.) The full-length horizontal line shows the mixer ratio, which currently has the value of zero over the whole of stick travel; this means that the elevator will not “follow” when the flaps are operated. The first step is to define the offset (mixer neutral point). To do this press the arrow button d of the left or righthand four-way button and move to the “Offs” line: MIX1 tr v offs el 0% 0% 0% STO SEL If this display appears, you have not activated the mixer by operating the assigned external switch - in this case “5”. To correct this, operate the switch: The dotted vertical line indicates the position of the mixer neutral point (“offset”), i. e. that point along the control travel at which the mixer has NO influence on the channel connected to its output. By default this point is set to the centre position. However, in our example the neutral (retracted) position of the flaps is located at the left-hand end-stop of the rotary proportional control, and in this position the elevator must not be affected. We therefore have to Program description: free mixers 109 33112_mx12_HoTT_2_GB.indd Abs36:109 06.06.2011 19:39:42 shift the mixer neutral point exactly to that position. If you have not already done so, turn the control - in our example this is CTRL 7 - to the left-hand end-stop and press the central SET button of the right-hand four-way button. The dotted vertical line now moves to this point - the new mixer neutral point - which always retains the “OUTPUT” value of zero in accordance with the mixer definition. As it happens, this setting is difficult to show in a screen shot, so we will change the “offset” value to only -75%. MIX1 tr v offs el 0% 0% –75% STO SEL Notes: • If you wish, you can move the offset value back to centre or otherwise adjust it as follows: select SEL using the arrow button f of the left or right-hand four-way button, followed by pressing the central SET button of the right-hand four-way button; you can now use the arrow buttons of the left or right-hand fourway button to move the offset value. • You can also return the mixer neutral point to centre automatically as follows: select SEL using the arrow button f of the left or right-hand four-way button, then simultaneously press the two arrow buttons cd or ef of the right-hand four-way button (CLEAR). Symmetrical mixer ratios The next step is to define the mixer values above and below the mixer neutral point, starting from its current position. Use the arrow button c of the left or right-hand four-way button to move to the “Travel” line: if necessary, use the arrow buttons ef of the left or right-hand fourway button to select the SYM field, so that you can set the mixer value symmetrically relative to the offset point you have just programmed. Press the central SET button of the right-hand four-way button, then set the values in the two highlighted fields within the range -150% to +150% using the arrow buttons of the right-hand fourway button. Remember that the set mixer value always refers to the input signal from the associated transmitter control (control signal)! Setting a negative mixer value reverses the direction of the mixer. Simultaneously pressing the two arrow buttons cd or ef of the right-hand four-way button (CLEAR) erases the mixer ratio in the highlighted field. The “optimum” value for our purposes will inevitably need to be established through a flight testing programme. MIX1 el tr v +20% +20% offs –75% SYM ASY Since we previously set the mixer neutral point to -75% of control travel, the elevator (“el”) will already exhibit a (slight) “down-elevator effect” at the neutral point of the landing flaps, and this, of course, is not wanted. To correct this we shift the mixer neutral point back to -100% of control travel, as described earlier. MIX1 el tr v +20% +20% offs –100% STO SEL If you were now to reset the offset from -75% to, say, 0% control travel, by selecting the SEL field using the arrow buttons f of the left or right-hand four-way button, and then briefly pressing the two arrow buttons cd or ef of the right-hand four-way button (CLEAR) simultaneously, the screen would look like this: MIX1 el tr v +20% +20% offs 0% STO SEL Asymmetrical mixer ratios For many applications it is necessary to set up different mixer values on either side of the mixer neutral point. Start by resetting the offset of the mixer used in our example (“6 ¼ el”) to 0%, as shown in the picture above. Now use the arrow button f of the left or right-hand four-way button to select the ASY field, and then press the central SET button of the right-hand four-way button. If you now turn the rotary proportional control CTRL 7 assigned in our example to input 6 - in the appropriate direction, the mixer ratio for each direction of control can be set separately, i. e. to left and right of the selected offset point using the arrow buttons of the right-hand 110 Program description: free mixers 33112_mx12_HoTT_2_GB.indd Abs36:110 06.06.2011 19:39:42 four-way button: MIX1 the switch channel “S” as the mixer input. Now move the selected switch to the OFF position, and move to the … el tr v +55% +20% offs 0% M1 M2 M3 el el el c1 c1 SYM ASY Note: If you are setting up a switch channel mixer of the “S ¼ NN *” type, you must operate the assigned switch to achieve this effect. The vertical line then jumps between the left and right sides. Examples: 1. The switch SW3 has already been assigned to control channel 6 in the “Transmitter control settings” menu, in order to open and close the aero-tow release. I5 free I6 +100% +100% +100% +100% typ to fro … mixer set-up page. Use the arrow button d of the left or right-hand fourway button to select the “Offs” line, then press the central SET button of the right-hand four-way button … according to the travel setting selected in the “Transmitter control settings” menu and the switch position, the offset value now jumps to +X% or -X%, e. g.: MIX3 tr v offs el 0% 0% +100% STO SET tr v In the meantime you have carried out a few aero-tow flights, which showed that you always needed to hold in slight up-elevator during the tow. You now wish to set the elevator servo (connected to receiver output 3) to slight “up” trim when the tow release is closed. In the screen display familiar from page 107 we have set up the third linear mixer to accomplish this, using Use the arrow button c of the left or right-hand fourway button to move to the “Travel” line, then press the central SET button of the right-hand four-way button. After moving the selected switch to the mixer ON position, set the required mixer ratio in the now highlighted value fields using the arrow buttons of the right-hand four-way button. MIX3 el tr v +10% +10% offs +100% SYM ASY 2. The following example applies to model helicopters: In the case of helicopters with one to max. three swashplate servos, receiver socket 5 is generally used for gyro gain control. For example, if you wish to use a gyro without an adjustment facility from the transmitter, or don’t wish to use such a facility, control channel 5 can be used for some other purpose: you may wish to assign one of the rotary proportional knobs (CTRL 7 or 8) to the collective pitch trim function. In the “Transmitter control settings” menu assign one of these two transmitter controls to input “E5”. Now simply define a free mixer “5 ¼ 1” with a symmetrical mixer ratio of, say, 25%. Due to the internal coupling, this transmitter control now acts equally on all the collective pitch servos you are using, without affecting the throttle servo. MIX1 tr v +25% +25% offs 0% SYM ASY If you use this mixer, you MUST leave receiver socket 5 unused. NN = Nomen Nominandum (name to be stated) Program description: free mixers 111 33112_mx12_HoTT_2_GB.indd Abs36:111 06.06.2011 19:39:42 Swashplate mixers Collective pitch, roll and pitch-axis mixers SP – MIXER ptch roll nick +61% +61% +61% the proper manner, then the first step is to change the mixer directions (“+” or “-”), before you attempt to correct the directions of servo rotation. Note: Ensure that the servos do not strike their mechanical end-stops if you change the mixer values. In the “Swashplate” line of the “Basic settings” menu you have already defined the number of servos which are installed in your helicopter to provide collective pitch control; see page 65. With this information the transmitter software automatically superimposes the functions for roll, pitch-axis and collective pitch as required, i. e. you do not need to define any additional mixers yourself. If you have a model helicopter which only has a single collective pitch servo, the “Swashplate mixer” menu point is - of course - superfluous, since the three swashplate servos for collective pitch, pitch-axis and roll are controlled independently of each other, i. e. no mixers are used. In this case the swashplate mixer menu does not appear in the multi-function list. With all other swashplate linkages employing 2 … 4 collective pitch servos, the mixer ratios and directions are set up by default, as can be seen in the screen shot above. The pre-set value is +61% in each case, but the value can be varied within the range -100% to +100% using the arrow buttons of the right-hand four-way button, after pressing the central SET button of the same four-way button. Simultaneously pressing the two arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the mixer input in the highlighted field to the default value of +61%. If the swashplate control system (collective pitch, roll and pitch-axis) does not follow the transmitter sticks in 112 Program description: Swashplate mixers - model helicopter 33112_mx12_HoTT_2_GB.indd Abs37:112 06.06.2011 19:39:42 Servo display Use the arrow buttons of the left or right-hand four-way button to leaf through to the “Servo display” menu point of the multi-function menu: mod.mem. ser vo set. D/R expo wing mixer ser vo disp fail-safe base sett. contr set. phase trim free mixer basic sett telemetr y Open the menu point by pressing the central SET button of the right-hand four-way button. However, this visual display of the current servo positions can be called up not only by selecting this menu, but also directly by simultaneously pressing the buttons ef of the left-hand four-way button from the transmitter’s basic display, and also from almost any menu position. Pressing the central ESC button of the left-hand four-way button returns you to your starting point again. –100 % 0% 0% +100 % 0% 0% The current position of any servo is displayed in barchart form, which takes into account the transmitter control and servo settings, the Dual-Rate / Expo functions, the interaction of all active mixers etc., within the range -150% to +150% of normal travel. 0% corresponds exactly to the servo centre position. The servo display provides a quick method of checking your settings, without having to switch on the receiving system. However, this does not relieve you of the need to check all your programming steps carefully on the model before operating it for the first time, as this is the only safe method of excluding possible programming errors. The display is based on the following scheme for fixed-wing models: Bar 1 = throttle / brake servo or (right) flap Bar 2 = aileron or left aileron Bar 3 = elevator Bar 4 = rudder Bar 5 = right aileron Bar 6 = (left) flap / free channel or 2nd elevator servo and for model helicopters: Bar 1 = collective pitch or roll (2) or pitch-axis (2) servo Bar 2 = roll (1) servo Bar 3 = pitch-axis (1) servo Bar 4 = tail rotor servo (gyro) Bar 5 = gyro or pitch-axis (2) servo Bar 6 = throttle servo or speed controller Note: Please bear in mind that the servo display refers exclusively to the original servo sequence, i. e. it does NOT take into account any output swapping, as can be carried out in the “Receiver output” sub-menu in the “Basic settings” menu, page 60 / 69. Program description: servo position 113 33112_mx12_HoTT_2_GB.indd Abs38:113 06.06.2011 19:39:42 Basic settings Use the arrow buttons of the left or right-hand four-way button to leaf through to the “basic settings” menu point of the multi-function menu: mod. mem. ser vo set. D/R expo wing mixer ser vo disp fail-safe base sett. contr set. phase trim free mixer basic sett telemetr y Press the central SET button of the right-hand four-way button to open the menu point: Batt type Batt warning Touch Sense Contrast Display light RF Countr y Voice volume Beep volume Ni-MH 4.7V unlim Euro four-way button to alter the default value. Pressing the central SET button once more concludes the entry process. Battery type Batt type Batt war ning Touch Sense Contrast Display light Ni-MH 4.7v unlim In this line you inform the transmitter whether its power is to be drawn from a four-cell NiMH battery or a singlecell LiPo battery. The voltage range offered in the (next) line “Battery warning threshold” will vary according to this setting. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the value in the highlighted field to NiMH. Battery warning threshold In this menu you can enter basic settings which are specific to the transmitter. Note: Settings in this menu only need to be entered once, and apply to the whole transmitter. This means that the last valid settings always appear when you call up this menu from another model memory. Use the arrow buttons cd of the left or right-hand four-way button to select the appropriate line, then press the central SET button of the right-hand four-way button. The value field is now highlighted (black background), and you can use the arrow buttons of the right-hand Batt type Batt war ning Touch Sense Contrast Display light Ni-MH 4.7v unlim In this line you can enter any voltage you like … 4.2 V (LiPo battery) - according to your choice of battery type - in increments of 0.1 Volt. However, never be tempted to enter too low a value here, to ensure that you always have ample time to land your model safely if a battery warning should be triggered. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the value in the highlighted field to 4.7 V or 3.4 V respectively. Button response Batt type Batt war ning Touch Sense Contrast Display light Ni-MH 4.7v unlim In this line you can select the speed of response of the four-way buttons within the range 1 to 10. The higher the set value, the longer the button has to be pressed before the software responds. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the value in the highlighted field to “2”. Contrast You can adjust the contrast of the mx-12 HoTT’s integral screen to optimise its legibility in varying weather and temperatures: batter y needs charging … within the range 4.5 to 5.5 V (NiMH battery) or 3.4 to 114 Program description: basic settings 33112_mx12_HoTT_2_GB.indd Abs39:114 06.06.2011 19:39:42 GRAUBELE #01 5.2V 50% 3:33h GRAUBELE #01 5.2V 50% 3:33h 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V This is accomplished by selecting the “Contrast” line using the arrow buttons cd of the left or right-hand four-way button: Screen backlight Batt type Batt war ning Touch Sense Contrast Display light of the right-hand four-way button (CLEAR) resets the value in the highlighted field to “Euro”. Ni-MH 4.7v unlim This line determines how long the screen backlighting remains on when you switch the transmitter on, and after the last button-press. The available values are “unlimited” “30 s”, 60 s” and “120 s”. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the value in the highlighted field to “unlimited”. Country setting Batt type Batt war ning Touch Sense Contrast Display light Ni-MH 4.7v unlim Press the central SET button of the right-hand four-way button: the value field is now highlighted, and you can adjust the screen contrast within the range +/- 20 using the arrow buttons of the right-hand four-way button: Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the value in the highlighted field to “0”. Batt war ning Touch Sense Contrast Display light RF Country 4.7v unlim Euro The purpose of the country setting is to fulfil the requirements of various directives (FCC, ETSI, IC, etc.). For example, radio control systems operated in France must be set to a restricted frequency band. For this reason the transmitter’s country setting MUST be set to “France” mode before the system is used in that country. It is prohibited to use the Universal / EURO mode in France. Simultaneously pressing the arrow buttons cd or ef Voice volume Touch Sense Contrast Display light RF Country Voice volume unlim Euro In this line you can define the volume of the speech output which is generated through earphones when the optional earphone socket, Order No. 33001.71, is fitted; the available range is “0” to “10”. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the value in the highlighted field to “3”. Beep volume Contrast Display light RF Country Voice volume Beep volume unlim Euro This line determines the volume of the transmitter’s internal sounder within the range “0” to “6”. Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the value in the highlighted field to “3”. Program description: basic settings 115 33112_mx12_HoTT_2_GB.indd Abs39:115 06.06.2011 19:39:42 Fail-Safe FAIL SAFE Pos hold 1 2 3 4 5 6 Delay 0.25s STO The inherently higher operational security of the HoTT system compared with classic PPM technology is due to the ability of the HoTT receiver’s integral micro-processor to process the signals from “its” transmitter exclusively, and also to process any “dirty” control signals which it picks up. The receiver constantly stores the latest valid signals, and invalid signals are automatically replaced by the stored signals - but only if the control signal is seriously inaccurate or even damaged, e. g. due to interference from an outside source. This process is dependent upon various settings which are described later in this section. For example, the receiver suppresses brief interference such as field strength “holes” and similar effects which would otherwise result in the familiar “glitches”. When this happens, the red LED on the receiver lights up. If you have not yet programmed any Fail-Safe settings in the currently active model memory, the following warning display will appear in the basic display for a few seconds when you switch the transmitter on: fail safe setup t.b.d Programming The “Fail-Safe” function determines the receiver’s behaviour when interference occurs in the transmission from transmitter to receiver. The receiver outputs 1 … 6 can optionally … 1. maintain (“hold”) their current position: If interference should occur, all servos programmed to “hold” mode remain at the position last assessed by the receiver as correct until such time as a new, correct control signal arrives at the receiver, or 2. move to a user-selectable position (“Pos”) if interference occurs, after a “delay” time has elapsed. Use the arrow buttons ef of the left or right-hand four-way button to select the desired servo socket 1 to 6 (z), then press the central SET button of the right-hand four-way button to switch between “hold” ( ) and “position” ( ) mode: FAIL SAFE s, 0.75 s and 1 s). Simultaneously pressing the arrow buttons cd or ef of the right-hand four-way button (CLEAR) resets the highlighted field to the default value of 0.75 s. Now use the arrow buttons ef of the left or right-hand four-way button to select the STO field at bottom right of the screen; SIMULTANEOUSLY move the servos for which you have selected Position mode to the desired positions using the associated transmitter controls. A press of the central SET button of the right-hand fourway button stores these positions in the receiver as the Fail-Safe settings, so that it can revert to these if interference should strike. The transmitter informs you of the stored data by briefly displaying: FAIL SAFE Pos hold 1 2 3 4 5 6 STO Delay 0.25s Now select the “Delay” option at bottom left of the screen using the arrow buttons ef of the left or righthand four-way button … FAIL SAFE Pos hold 1 2 3 4 5 6 STO Delay 0.25s … press the central SET button of the right-hand fourway button, and use its arrow buttons to select your preferred delay period from the four on offer (0.25 s, 0.5 Pos hold Position stored 1 2 3 4 5 6 Delay 0.25s STO Caution: We strongly recommend that you make use of the safety potential of this option by at least setting the throttle position (glow-powered models) to idle, or the electric motor to stop, if a fail-safe event should be triggered. Model helicopters should be programmed to “hold”. This simple precaution ensures that the model is much less likely to cause havoc and cause property damage or personal injury. 116 Program description: Fail-Safe 33112_mx12_HoTT_2_GB.indd Abs40:116 06.06.2011 19:39:42 Telemetry The “Telemetry” menu is used to call up and program transmitter and receiver data, and data generated by optional telemetry sensors (see Appendix), in real time. Receiver data are transmitted to the transmitter via the HoTT receiver’s integral downlink channel. One telemetry sensor can be connected to the Telemetry input of the following receivers: GR-12S HoTT (Order No. 33505), GR-12 HoTT (Order No. 33506) and GR-16 (Order No. 33508). Two telemetry sensors can be connected to the HoTT GR-24 HoTT receiver (Order No. 33512). Since this and future receivers can be updated by the user, the associated “Telemetry” menus can constantly be kept up-to-date, and expanded with the introduction of additional functions or languages in future. Note: If you register your product under http://www.graupner. de/en/service/product_registration you will automatically be informed about new updates by e-mail. Before updating the transmitter software you should always back up all occupied model memories to a compatible laptop or PC in order to avoid a possible loss of data. In addition to the back-ups mentioned above, firmware updates are transferred using the transmitter’s PC socket and the optional USB adapter, Order No. 7168.6 and the connecting lead, Order No. 6466.S, in conjunction with a PC running the Windows XP, Vista or 7 operating system. The programs required for this and related information can be found in the Download area for the corresponding products at the website www.graupner.de. We always recommend that you load the latest firmware into your equipment, to ensure that your system is constantly kept up-to-date. Important information: • These instructions cover the functions available at the time of going to press. • As mentioned in the sections entitled “Binding multiple receivers” on pages 61 and 70, it is possible to bind more than one receiver per model. However, in subsequent operations only the receiver which was bound last is able to make a telemetry connection to the transmitter. On the other hand, this also means that only the last bound receiver can be addressed using the Telemetry menu. You may therefore need to change the binding sequence before you can enter settings which relate to a particular receiver. • When setting up the radio control system, please ensure at all times that the transmitter aerial is an adequate distance from the receiver aerials. A safe distance is about one metre. If you neglect this, you risk interference with the downlink channel, and consequent malfunctions. • Since the transmitter and receiver only exchange telemetry data after each fourth data packet, data transmission inevitably requires a certain amount of time, which means that there will be some delay in responding to button-presses and set-up changes. This does not constitute an error. • Changes to model and sensor programming must only be carried out when the model is on the ground. Do not make any alterations unless the motor is switched off and the flight battery is disconnected. If you ignore this, unwanted effects of programming changes cannot be excluded. For example, if you accidentally initiate an active servo test at the receiver, the model could crash and cause personal injury or property damage. Please see the Safety Notes on pages 3 … 6 of this manual and the various individual instructions. • All settings which you enter using the “Telemetry” menu, such as Fail-Safe, servo direction, servo travel, mixer and curve settings etc., are stored exclusively in the receiver, and are therefore carried over if you install the receiver in a different model. For this reason we strongly recommend that you re-initialise your HoTT receiver if you wish to use it in another model; see “Reset” on page 33. • We therefore recommend that you program directions of servo rotation, servo travel, mixer and curve settings using only the mx-12-specific standard menus “Servo settings” (page 72), “Free mixers” (page 107) and “D/R Expo” (pages 82 and 84). If you ignore this, the settings may overlap and interfere with each other; in the most favourable case this can result in confusion when operating the model, and in the least favourable case it could cause problems. • The channel-mapping function of the mx-12 HoTT’s integral “Telemetry” menu can be used to share out control functions between multiple receivers in any way, or even to assign the same control function to several receiver outputs; for example, you may wish to operate each aileron with two servos instead of just one, etc. Once again we strongly recommend that you act as cautiously as possible when carrying out the programming. Program description: Telemetry menu 117 33112_mx12_HoTT_2_GB.indd Abs45:117 06.06.2011 19:39:42 SETTING & DATA VIEW Telemetry The menus grouped together under the overall heading “Telemetry” are called up from the basic display of the mx-12 HoTT transmitter by holding the central ESC button of the left-hand four-way button pressed in for about three seconds. An alternative method of calling up this menu, which also applies to the transmitter’s other menus, is to briefly press the central SET button of the right-hand four-way button in the multi-function list: mod. mem. ser vo set. D/R expo wing mixer ser vo disp fail-safe base sett. contr set. phase trim free mixer basic sett telemetr y Basic menu operation In general terms the “Telemetry” menu is operated just like the other menus of the mx-12 HoTT transmitter. The few differences are described below: You can switch between the individual pages of the Telemetry menu using the arrow buttons ef of the left or right-hand four-way button: you will find corresponding direction indicators at top right of every screen page in the form of angle brackets (< >); see illustrations. If only one angle bracket is visible, then you are currently at the first or last page. In this case it is only possible to switch pages in the direction indicated by the angle bracket. Menu lines in which parameters can be altered are marked with an angle bracket prefix (>). Pressing the arrow buttons cd of the left or right-hand four-way button causes the “>” pointer to jump forward or back by one line. Lines to which you cannot jump contain no user-variable values. 118 Program description: Telemetry menu 33112_mx12_HoTT_2_GB.indd Abs45:118 If you wish to change a parameter, press the central SET button of the right-hand four-way button to highlight the parameter (black background)). Change the value within the possible range using the arrow buttons of the right-hand four-way button, and then press the SET button again briefly to accept the value. At this point you can use the arrow buttons cd of the left or right four-way button to select the desired submenu. However, if the message … CAN‘T RECEIVE DATA OK SETTING & DATA VIEW TELEMETRY SETTING & DATA VIEW SIMPLE DATA VIEW RF STATUS VIEW VOICE TRIGGER On the first screen page of the sub-menu “Setting & Data View”, headed … RX DATAVIEW … you cannot enter any settings. This page is for information purposes only: … appears instead of the desired sub-menu when you press the central SET button of the right-hand four-way button, then the transmitter has no connection to a receiver. In this case, switch your receiving system on, or re-bind the receiver you wish to address, if this should not be the last bound one; see “Important information” on the previous page. RX DATAVIEW S–QUA100%S–dBM–030dBM S–STR100% R–TEM.+28°C L PACK TIME 00010msec R-VOLT :05.0V L.R-VOLT:04.5V SENSOR1 :00.0V 00°C SENSOR2 :00.0V 00°C Value Explanation S-QUA Signal quality in % S-dBm Receive performance in dBm S-STR Signal strength in % R-TEM. Receiver temperature in °C L PACK TIME Indicates the time in ms for which the longest data packet was lost in transmission between transmitter and receiver R-VOLT Current receiver operating voltage, in Volt 06.06.2011 19:39:42 L.R-VOLT Lowest receiver operating voltage since the last power-on, in Volt SENSOR1 Shows the values of the optional telemetry sensor 1 in Volt and °C SENSOR2 Shows the values of the optional telemetry sensor 2 in Volt and °C Signal quality (S-QUA) The signal quality (S-QUA) is sent “live” to the transmitter via the receiver’s downlink channel, and shows the signal strength in %. Receive performance (S-dBm) The receive performance (S-dBm) is displayed as a negative value, i. e. a value approaching zero is the highest value (= best reception). The lower the value falls, the worse is the receive performance. This is an important item of information, particularly when you are carrying out a range-check before operating the model. Note: In the case of negative numbers the value is reversed: the higher the number following the minus sign, the lower the value. Carry out a range-check as described on pages 62 and 71 before every flight, and remember to simulate all the servo movements which are likely to occur in the air. In active range-check mode the range must be at least fifty metres on the ground. To guarantee safe operation of your model, a value no higher than -80 dBm must be displayed in the “RX DATA” display under “S-dBm” at this distance. If the value falls below this (e. g. -85 dBm), you should under no circumstances fly your model. Instead check the receiving system installation and the aerial positions. When operating a model this value should not fall below -90 dBm; if it does, reduce the distance between the pilot and the model. However, the audible range warning (beeping at one-second intervals) will normally be triggered before this value is reached, in order to ensure safe operation. Signal strength (S-STR) The value for signal strength (S-STR) is displayed in %. An audible range warning (beeping at one-second intervals) will always be generated as soon as the receiver signal in the downlink channel is too weak. However, since the transmitter has a much higher transmitting power than the receiver, the model can still be operated safely at this point. Nevertheless, in the interests of safety the distance to the model should be reduced until the audible warning ceases. Receiver temperature (R-TEM.) Ensure under all flight conditions that the receiver stays within its specified temperature range (ideally between -10 and +55°C). The limit values for receiver temperature after which a warning occurs can be set in the “SERVO TEST” sub-menu under “ALARM TEMP+” (50 … 80°C) and “ALARM TEMP-” (-20 … +10°C). If the temperature exceeds or falls below the set limit, an audible signal (continuous beeping) is triggered, and “TEMP.E” is displayed at top right in all the “RX” receiver sub-menus. At the same time the “R-TEM“ parameter is highlighted on the “RX DATAVIEW” screen page. which the radio control system went into Fail-Safe mode. Operating voltage (R-VOLT) Check the receiver’s operating voltage constantly. If it is too low, you must under no circumstances continue to operate your model, and certainly not launch it. The low receiver voltage warning can be adjusted within the range 3.0 to 6.0 Volt in the “SERVO TEST” sub-menu under “ALARM VOLT”. If the voltage falls below the threshold, an audible signal (repeated double beep, long / short) is generated, and in all the receiver sub-menus “RX …” you will see “VOLT.E” at top right. At the same time the parameter “R-VOLT” is highlighted in the “RX DATAVIEW” sub-menu. The current receiver battery voltage is also shown in the basic display; see page 24. Minimum operating voltage (L.R-VOLT) “L.R-VOLT” shows the receiver’s minimum operating voltage since the last time it was switched on. If this voltage differs significantly from the current operating voltage “R-VOLT”, this could mean that the receiver battery is being overstressed by the servos, causing collapses in battery voltage. If this should occur, we recommend installing a higher-performance receiver battery to ensure maximum operating safety. Sensor 1 + 2 Shows the values of the optional telemetry sensor 1 and, if present, sensor 2 in Volt and °C. You will find a description of these sensors in the Appendix. Data packets (L PACK TIME) This displays the longest period in ms in which data packets were lost in transmission from the transmitter to the receiver. In practice this means the longest time in Program description: Telemetry menu 119 33112_mx12_HoTT_2_GB.indd Abs45:119 06.06.2011 19:39:43 RX SERVO RX SERVO OUTPUT CH: REVERSE CENTER TRIM TRAVEL– TRAVEL+ PERIOD 01 OFF 1500μsec –000μsec 150% 150% 20msec Before you carry out any programming at this screen display be sure to read the information on page 117. Value Explanation Possible settings OUTPUT CH Channel select 1 … according to receiver REVERSE Servo reverse OFF / ON CENTER Servo centre in µs If active (highlighted), according to transmitter control position TRIM Trim position in µs -120 … +120 µs deviating from the CENTRE position TRAVEL– Travel limitation at 30 … 150% % servo travel TRAVEL+ Travel limitation at 30 … 150% % servo travel PERIOD Cycle time in ms 10 or 20 ms OUTPUT CH (Channel select) Select the “Channel” line if necessary using the arrow buttons. Press the SET button of the right-hand four-way button to highlight the value field. Now use the arrow buttons of the right-hand four-way button to set the desired channel (e. g. 01). The following parameters always refer to the channel which you set at this point: REVERSE (servo reverse) Sets the direction of rotation of the servo connected to the selected control channel: ON / OFF CENTER (servo centre) The “CENTRE” line displays the current pulse width in µs of the control channel selected in the “OUTPUT CH” line. The displayed value varies according to the current position of the transmitter control which affects this control channel, and also its trim position. A pulse width of 1500 µs corresponds to the standard centre position, and therefore the usual servo centre setting. To change this value, select the “CENTRE” line and press the SET button. Move the corresponding transmitter control to the desired position, and press the SET button again to store the current transmitter control position. This position is now stored as the new neutral position. TRIM (trim position) The purpose of the “TRIM” line is to provide fine adjustment of the neutral position of a servo connected to the control channel selected in the “OUTPUT CH” line. Adjustments are made in 1 µs increments using the arrow buttons of the right-hand four-way button. The value in the “CENTRE” line can be adjusted over the range +/- 120 µs around the TRIM value set here. Default setting: 0 µs TRAVEL–/+ (servo travel –/+) This option can be used to place a limit on servo travel (control surface travel) for the servo connected to the control channel selected in the “OUTPUT CH” line. The value is set separately for each side of centre. The setting can be altered separately for both directions within the range 30 ... 150%. Default setting: 150% on both sides. PERIOD (cycle time) In this line you can determine the frame time for the individual channel signals. This setting applies to all control channels. If you use digital servos exclusively, it is safe to set a cycle time of 10 ms. If you are using a mixture of servo types, or exclusively analogue servos, it is essential to set 20 ms, otherwise the servos will be “over-stressed” and may response by jittering or making rumbling noises. RX FAIL SAFE RX FAIL SAFE OUTPUT CH: 01 INPUT CH: 01 MODE : HOLD F.S.Pos. : 1500μsec DELAY : 0.75sec FAIL SAFE ALL: NO POSITION : 1500μsec Before we describe this menu a few words as a reminder: “Doing nothing” is the worst thing you can do in this regard. The default setting for the HoTT receiver is “HOLD” mode. If interference should occur with hold-mode in force, and 120 Program description: Telemetry menu 33112_mx12_HoTT_2_GB.indd Abs45:120 06.06.2011 19:39:43 if you are very lucky, the model aircraft will fly straight ahead for an indefinite period and then “land” somewhere or other without causing major damage. However, if the interference strikes in the wrong place and at the wrong time, then a power model could become uncontrollable and tear wildly across the flying field, endangering pilots and spectators. MODE Fail-Safe mode HOLD FAIL SAFE OFF F.S.Pos. Fail-Safe position 1000 … 2000 µs DELAY Response time (delay) 0,25, 0,50, 0,75 and 1,00 s For this reason you really must consider whether you should at least program the throttle to “motor stopped”, to avoid the worst of these risks. FAIL SAFE ALL Stores fail-safe positions for all control channels NO / SAVE After that warning we present a brief description of the three possible Fail-Safe variants offered by the mx-12 HoTT transmitter: The simplest way of setting Fail-Safe - and the one we recommend - is to use the “Fail-Safe” menu, which is accessed from the multi-function list; see page 116. A similar alternative, albeit slightly more difficult to access, is to use the “FAIL-SAFE ALL” option described on the next double-page. And finally there is the relatively complex method of entering individual settings using the “MODE”, “F.S.Pos.” and “DELAY” options. The description of this variant starts below with the “MODE” option. POSITION Displays stored Fail-Safe position between approx. 1000 and 2000 µs Value Explanation Possible settings OUTPUT CH Output channel (receiver servo socket) 1 … according to receiver INPUT CH 1 … 16 Input channel (control channel coming from transmitter) 33112_mx12_HoTT_2_GB.indd Abs45:121 OUTPUT CH (servo socket) In this line you select the OUTPUT CH (receiver servo socket) which is to be adjusted. INPUT CH (input channel select) As already mentioned on page 117, the six control functions of the mx-12 HoTT transmitter can be shared out between several receivers if necessary, or alternatively several receiver outputs can be assigned to the same control function; for example, you may wish to be able to operate each aileron with two servos, or to control an oversized rudder using two coupled servos instead of a single one. Sharing control functions amongst multiple HoTT receivers is a useful idea for large-scale models, for example, to avoid long servo leads. In this case bear in mind that only the last bound receiver can be addressed using the “Telemetry” menu. The six control channels (INPUT CH) of the mx-12 HoTT can be managed in the appropriate manner using the facility known as “channel mapping”, i. e. by assign- ing a different control channel in the INPUT CH line to the receiver servo socket selected in the OUTPUT CH line. BUT CAUTION: if, for example, you have entered “2AIL” in the “Aileron/flap” line of the “Basic settings” menu at the transmitter, then control function 2 (aileron) is already divided to control channels 2 + 5 for the left and right ailerons. The corresponding receiver INPUT CH, i. e. those to be mapped, would in this case be channels 02 + 05. Examples: • You wish to assign two or more servos to each aileron of a large-scale model aircraft: Assign one and the same INPUT CH (control channel) to each of the appropriate OUTPUT CH (servo sockets). The appropriate servo sockets are selected for the left or right wing, while the INPUT CH will be one of the two default aileron control channels 2 + 5. • You wish to control the rudder of a large-scale model aircraft using two or more servos: Assign one and the same INPUT CH (control channel) to each of the appropriate OUTPUT CH (servo sockets); in this case the default rudder channel 4. MODE The settings you enter for the options “MODE”, “F.S.Pos.” and “DELAY” determine the receiver’s behaviour if interference should affect the transmission from transmitter to receiver. The setting programmed under “MODE” always refers to the channel you have set in the OUTPUT CH line. The default setting for all servos is “HOLD”. For each selected OUTPUT CH (receiver servo socket) you can choose between: • FAI(L) SAFE Program description: Telemetry menu 121 06.06.2011 19:39:43 If interference occurs, the corresponding servo moves to the position displayed in the “POSITION” line for the duration of the interference, after the “delay time” set in the “DELAY” line. • HOLD If interference occurs, a servo set to “HOLD” maintains the position last assessed as correct for the duration of the interference. • OFF If set to “OFF” when interference occurs, the receiver continues to send the last correct control signals (which it has stored) to the corresponding servo output for the duration of the interference. This can be imagined as the receiver switching the signal wire “off”. But CAUTION: if the control signal is absent, analogue servos and many digital servos offer no resistance to the forces acting on the control surfaces, with the result that the model’s control surface positions are more or less quickly lost. F.S.Pos. (Fail-Safe position) For each OUTPUT CH (receiver servo socket) activate (highlight) the value field by pressing the central SET button of the right-hand four-way button, then use the arrow buttons of the right-hand four-way button in the “F.S.POS.” line to set the servo position which the servo is to take up in “FAIL-SAFE” mode if interference should occur. The setting can be entered in increments of 10 µs. Default setting: 1500 µs (servo centre) Important note: The “F.S.POS.” function is also significant if the receiver is switched on, but is (not yet) receiving a valid signal; this applies to all three modes “OFF”, “HOLD” and “FAIL- SAFE”: The servo immediately runs to the Fail-Safe position previously set in the “Position” line. This can be exploited, for example, to prevent the operation of a retractable undercarriage or similar function if the receiver is switched on accidentally. However, during normal model operations the corresponding servo behaves in accordance with the set “MODE” if interference should strike. DELAY (fail-safe response time or delay) At this point you can set the delay time after which the servos are to run to their previously selected positions if the signal should be interrupted. This setting applies to all channels, but only affects the servos programmed to “FAIL-SAFE” mode. Default setting: 0.75 s FAIL SAFE ALL (global fail-safe setting) This sub-menu can be used to define the Fail-Safe position of the servos simply by “pressing a button”; it operates in a similar manner to the “Fail-Safe” menu described on page 116, and is simple to use: Move to the “FAIL-SAFE ALL” line and press the central SET button of the right-hand four-way button to activate the value field; “NO” is highlighted (black background). Now set the parameter to “SAVE” using one of the arrow buttons of the right-hand four-way button. Use the transmitter controls to move all the servos which you have assigned - or intend to assign later - in the “MODE - FAIL-SAFE” line, to the desired fail-safe positions. In the extreme bottom line “Position” displays the current position of the transmitter control for the channel you have just set: RX FAIL SAFE OUTPUT CH: 01 INPUT CH: 01 MODE : FAI-SAFE F.S.Pos. : 1500μsec DELAY : 0.75sec FAIL SAFE ALL: SAVE POSITION : 1670μsec After pressing the central SET button of the right-hand four-way button once more, the display reverts from “SAVE” to “NO”. This indicates that the position of all the servos affected by the procedure have now been stored, and have also been adopted in the “F.S.Pos.” line. At the same time the position for the current OUTPUT CH (servo socket) is immediately displayed on the screen. RX FAIL SAFE OUTPUT CH: 01 INPUT CH: 01 MODE : FAI-SAFE F.S.Pos. : 1670μsec DELAY : 0.75sec FAIL SAFE ALL: NO POSITION : 1670μsec Switch the transmitter off, and check the Fail-Safe positions by observing the servo movements. “Fail-Safe” in combination with “channel mapping” It is clearly desirable that mapped servos - i. e. servos which are controlled by a common control channel (INPUT CH) - should respond in the same way when interference occurs, so the corresponding settings of the INPUT CH determine the behaviour of mapped servos. For example, if you are using a GR-16 eight-channel receiver, Order No. 33508, and receiver servo sockets 6, 7 and 8 are mapped together, i. e. if the same control channel “04” is assigned as INPUT CH to OUTPUT CH (servo sockets) 06, 07 and 08 … 122 Program description: Telemetry menu 33112_mx12_HoTT_2_GB.indd Abs45:122 06.06.2011 19:39:43 RX FAIL SAFE OUTPUT CH: 06 INPUT CH: 04 MODE : OFF F.S.Pos. : 1670μsec DELAY : 0.75sec FAIL SAFE ALL: NO POSITION : 1670μsec RX FAIL SAFE OUTPUT CH: 04 INPUT CH: 01 MODE : FAI-SAFE F.S.Pos. : 1500μsec DELAY : 0.75sec FAIL SAFE ALL: NO POSITION : 1500μsec RX FAIL SAFE OUTPUT CH: 07 INPUT CH: 04 MODE : OFF F.S.Pos. : 1230μsec DELAY : 0.75sec FAIL SAFE ALL: NO POSITION : 1670μsec In this case servo socket 04 would respond in accordance with the Fail-Safe settings for CH 01. In contrast, the response or delay time set in the “DELAY” line always applies uniformly to all channels which are set to “FAIL-SAFE”. RX FREE MIXER RX FREE MIXER MODE : 1 MASTER CH: 00 SLAVE CH : 00 S–TRAVEL–: 100 S–TRAVEL+: 100 RX WING MIXER TAIL TYPE: NORMAL RX FAIL SAFE OUTPUT CH: 08 INPUT CH: 04 MODE : HOLD F.S.Pos. : 1770μsec DELAY : 0.75sec FAIL SAFE ALL: NO POSITION : 1670μsec … then INPUT CH 04 determines the Fail-Safe behaviour of the three servos connected to control channel 4, regardless of the individual settings of the OUTPUT CH for INPUT CH 04: RX FAIL SAFE OUTPUT CH: 04 INPUT CH: 04 MODE : FAI-SAFE F.S.Pos. : 1500μsec DELAY : 0.75sec FAIL SAFE ALL: NO POSITION : 1500μsec This also applies, for example, if it is mapped in turn to INPUT CH 01: Value Explanation Possible settings MODE Mixer select 1, 2 or 3 MASTER CH Primary channel 0, 1 … according to transmitter SLAVE CH Secondary channel 0, 1 … according to receiver S-TRAVEL– Negative mix value 0 … 100% S-TRAVEL+ Positive mix value 0 … 100% RX WING MIXER Tail type NORMAL, V-TAIL ELEVON (aileron / elevator mixer for deltas and flying wings) MIXER Up to three mixers can be programmed simultaneously. You can switch between mixer 1, mixer 2 and mixer 3 using “MIXER”. The following settings on this screen always apply to the mixer selected in the MIXER line. Important note: If you have already programmed mixer functions in the “Wing mixers” or “Free mixers” menus, check very carefully that those mixers do not overlap with those of the “RX FREE MIXER” menu. MASTER CH (“from”) The signal present at the MASTER CH (master channel) is mixed into the SLAVE CH (slave channel) to a user-variable extent, following the same principles as described in detail in the section entitled “Free mixers” on page 107. Select “00” if no mixer is to be set. SLAVE CH (“to”) A proportion of the signal of the MASTER CH (master channel) is mixed into the SLAVE CH (slave channel); the mixer ratio is determined by the percentage figures entered in the “TRAVEL-” and “TRAVEL+” lines. Select “00” if no mixer is to be set. TRAVEL–/+ (mixer ratio in %) The mixer ratio in relation to the MASTER signal is Program description: Telemetry menu 123 33112_mx12_HoTT_2_GB.indd Abs45:123 06.06.2011 19:39:43 33112_mx12_HoTT_2_GB.indd Abs45:124 RX CURVE (EXPO) RX CURVE CURVE1 CH TYPE CURVE2 CH TYPE CURVE3 CH TYPE 02 03 04 Value Explanation CURVE1, 2 or 3 CH Channel assign1 … according to ment of the selec- receiver ted curve setting TYPE Curve type TYPE A Expo = –100% DR = 125% Possible settings A, B, C see illustration TYPE C Expo = +100% DR = 70% Servo travel +100% Servo travel +100% –100% –100% TYPE B linear Servo travel +100% TAIL TYPE The following model types are also available in the “Tail” line of the “Basic settings” menu (see page 58), and should normally be set up at that point. If you have done this, you should always leave the TAIL TYPE at NORMAL. However, if you prefer to use the receiver’s integral mixers, you can select the pre-set mixer function for the corresponding model type: • NORMAL This setting corresponds to the classic aircraft type with tail-mounted stabiliser panels and separate rudder and elevator. No mixer function is required for this model type. • V-TAIL For this model type the control functions elevator and rudder are linked together in such a way that each of the two control surfaces - actuated by a separate servos - carries out superimposed elevator and rudder functions. The servos are usually connected to the receiver as follows: OUTPUT CH 3: left V-tail servo OUTPUT CH 4: right V-tail servo If you find that the servos rotate in the wrong direction, please see the notes on page 44. • ELEVON (delta / flying wing models) The servos connected to outputs 2 and 3 assume superimposed aileron and elevator functions. The servos are usually connected to the receiver as follows: OUTPUT CH 2: left elevon 124 Program description: Telemetry menu OUTPUT CH 3: right elevon If you find that the servos rotate in the wrong direction, please see the notes on page 44. –100% determined separately for each direction by the values entered in these two lines. –100% 0 +100% Transmitter control travel –100% 0 +100% Transmitter control travel –100% 0 +100% Transmitter control travel In most cases a non-linear control function is used for aileron (channel 2), elevator (channel 3) and rudder (channel 4), and the default settings assume that this is the case. BUT CAUTION: this assignment only applies if you have not set either “2 ELE Sv” in the “Tail” line of the “Basic settings” menu, or “2AIL” or “2AIL 2FL” in the “Ail / flap” line, at the transmitter. Otherwise control function 3 (elevator) is already split over control channels 3 + 6, and control function 2 (aileron) is split over control channels 2 + 5 for the left and right ailerons. In both these cases the corresponding receiver control channels (INPUT CH) would then be channels 03 + 06 or 02 + 05. For example, if you have set “2AIL” at the transmitter, and wish to use the RX CURVE option discussed here instead of the “D/R Expo” menu (see page 82) of the mx-12 HoTT transmitter - which offers more individual adjustment options - then two curves must be set: RX CURVE CURVE1 CH TYPE CURVE2 CH TYPE CURVE3 CH TYPE 02 05 04 If you ignored this, the left and right ailerons would exhibit different control characteristics. The RX CURVE function can be used to manage the control characteristics for up to three servos: • CURVE 1, 2 or 3 CH Select the desired control channel (INPUT CH) for the first servo. The following setting in TYPE only affects the channel you select at this point. TYPE Select the servo curve: A: EXPO = -100% and DUAL RATE = 125% The servo responds slowly to stick movements around the neutral position, but the curve becomes steeper with increasing control travel. B: Linear setting 06.06.2011 19:39:43 The servo follows the stick movement with a linear response. C: EXPO = +100% and DUAL RATE = 70% The servo responds slowly to stick movements around the neutral position, but the curve becomes steeper with increasing control travel. Note: The control characteristics programmed at this point also affect mapped receiver outputs. RX SERVO TEST RX SERVO TEST ALL–MAX : 2000μsec ALL–MIN : 1000μsec TEST : STOP ALARM VOLT : 3.8V ALARM TEMP+: 70°C ALARM TEMP–:–10°C CH OUTPUT TYPE:ONCE Value Explanation Possible settings ALL-MAX Servo travel on the “+” side for all servo outputs in the servo test 1500 … 2000 µs ALL-MIN Servo travel on the “-” side for all servo outputs in the servo test 1500 … 1000 µs TEST Test procedure START / STOP ALARM VOLT Alarm limit for the receiver lowvoltage warning 3,0 … 6,0 V Default setting: 3,8 V ALARM TEMP+ ALARM TEMP– Alarm limit for 50 … 80 °C excessive receiver Default setting: temperature 70 °C Alarm limit for excessively low receiver temperature -20 … +10 °C Default setting: -10 °C CH OUTPUT Channel sequence ONCE, SAME, TYPE SUMI, SUMO ALL MAX (maximum servo travel) In this line you can set the maximum servo travel for the servo test on the plus side of control travel. 2000 µs corresponds to full travel, 1500 µs corresponds to the neutral position. ALL MIN (minimum servo travel) In this line you can set the maximum servo travel for the servo test on the minus side of control travel. 1000 µs corresponds to full travel, 1500 µs corresponds to the neutral position. TEST In this line you can start and stop the receiver’s integral servo test. Press the central SET button of the right-hand four-way button to activate the input field: Now select START with one of the arrow buttons of the right-hand four-way button: RX SERVO TEST ALL–MAX : 2000μsec ALL–MIN : 1000μsec TEST : START ALARM VOLT : 3.8V ALARM TEMP+: 70°C ALARM TEMP–:–10°C CH OUTPUT TYPE:ONCE Press the central SET button of the right-hand four-way button to start the test-run. The input field now reverts from highlighted to “normal”: RX SERVO TEST ALL–MAX : 2000μsec ALL–MIN : 1000μsec TEST : START ALARM VOLT : 3.8V ALARM TEMP+: 70°C ALARM TEMP–:–10°C CH OUTPUT TYPE:ONCE To stop the servo test, re-activate the input field as described previously, then select STOP and confirm your choice with the SET button of the right-hand four-way button. RX SERVO TEST ALL–MAX : 2000μsec ALL–MIN : 1000μsec TEST : STOP ALARM VOLT : 3.8V ALARM TEMP+: 70°C ALARM TEMP–:–10°C CH OUTPUT TYPE:ONCE Program description: Telemetry menu 125 33112_mx12_HoTT_2_GB.indd Abs45:125 06.06.2011 19:39:43 ALARM VOLT (low receiver voltage warning) ALARM VOLT monitors the receiver voltage. The threshold can be set to any value within the range 3.0 to 6.0 Volt. If the voltage falls below the set alarm limit, an audible signal (interval beeping, long / short) is triggered, and “VOLT.E” flashes at top right in all “RX …” screen displays: RX SERVO OUTPUT CH: REVERSE CENTER TRIM TRAVEL– TRAVEL+ PERIOD VOLT.E 01 OFF 1500μsec –000μsec 150% 150% 20msec The parameter “R-VOLT“ is also highlighted in the “RX DATAVIEW” display: RX DATAVIEW VOLT.E S–QUA100%S–dBM–030dBM S–STR100% R–TEM.+28°C L PACK TIME 00010msec R-VOLT :03.7V L.R-VOLT:03.5V SENSOR1 :00.0V 00°C SENSOR2 :00.0V 00°C ALARM TEMP +/- (receiver temperature monitor) These two options monitor the temperature of the receiver: a lower limit value “ALARM TEMP-” (-20 ... +10°C) and an upper limit value “ALARM TEMP+” (50 ... 80°C) can be programmed. If the temperature exceeds the upper limit or falls below the lower one, an audible signal (continuous beeping) is triggered, and “TEMP.E” appears at top right in all receiver displays. The parameter “R-TEM“ is also highlighted in the “RX DATAVIEW” display. Ensure that the receiver remains within the permitted 126 Program description: Telemetry menu 33112_mx12_HoTT_2_GB.indd Abs45:126 temperature range under all flight conditions (ideally between -10 and +50°C). CH OUTPUT TYPE At this point you can select how the receiver outputs are to be addressed. • ONCE The receiver servo sockets are addressed in sequence; this is recommended for use with analogue servos. At this setting the servos are automatically operated at a frame rate of 20 ms (30 ms with the twelve-channel receiver, Order No. 33512) - regardless of what is set or displayed in the “PERIOD” line of the “RX SERVO” display. • SAME The receiver servo sockets are addressed in parallel blocks of four, i. e. if you are using the GR-12 receiver included in the set, channels 1 to 4 and channels 5 and 6 each receive their control signals simultaneously. This is recommended for use with digital servos, and especially where multiple servos are employed for a single function (e. g. ailerons), to ensure that the groups of servos run absolutely synchronously. If you are using digital servos, we recommend that you set 10 ms in the “PERIOD” line of the “RX SERVO” display so that you can exploit the fast response of these servos. If you are using analogue servos, it is essential to select “20 ms”. If you choose the faster setting, please take particular care when selecting the receiver power supply: since up to four servos can start moving simultaneously, the load on the battery is fairly severe, so it must be a high-performance type. • SUMO (Sum signal OUT) A HoTT receiver configured as SUMO constantly generates what is known as a sum signal from the control signals of all its control channels. This signal is present, for example, at servo socket 8 of the GR16 and GR-24 receiver. The receiver outputs are addressed in sequence at a frame rate of 20 ms (30 ms with the GR-24 receiver, Order No. 33512), even if you have set 10 ms in the “PERIOD” line of the “RX SERVO” screen page. Although primarily intended for “satellite mode” with two HoTT receivers, as described below, the sum signal generated by the receiver defined as SUMO can also be used, for example, to control a flybarless system, or to control a flight simulator (using the adapter lead, Order No. 33310). In … Satellite mode … two HoTT receivers are inter-connected using a three-core connecting lead (Order No. 33700.1 (300 mm) or 33700.2 (100 mm) by the highest-numbered servo sockets. For more details on this please visit www.graupner.de on the Internet. All channels of the HoTT receiver which is configured as SUMO, and is defined as the satellite receiver, are constantly transferred to the second HoTT receiver the primary receiver - via this connection . The primary receiver must be programmed as the … • SUMI (Sum signal IN). Note that the signal only ever moves in one direction: towards the SUMI. However, if reception fails, the receiver defined as SUMI only uses the sum signal coming from the 06.06.2011 19:39:43 SUMO if at least one channel at the SUMI is programmed to Fail-Safe. If the receiver programmed as the satellite (SUMO) suffers signal reception failure, the servos connected to that receiver take up the Fail-Safe positions programmed in the satellite receiver, regardless of the primary receiver. If, in contrast, reception fails at both receivers simultaneously, then the receiver software (the version current at the time of printing these instructions) always reverts to the SUMO’s fail-safe settings. However, mutual interactions can certainly not be ruled out in individual cases, and for this reason we urgently advise you to carry out appropriate tests BEFORE flying a model. This receiver configuration is recommended in particular circumstances: for example, if one of the two receivers has to be installed in an unfavourable position in the model, or if there is a danger that the received signal will be weak in certain flight attitudes, perhaps due to a turbine, carbon fibre in the airframe, or a similar problem, with the result that sporadic range problems might be expected. For this reason it is essential to connect the most important control functions to the primary receiver (the one programmed as SUMI), so that interference to the satellite receiver (SUMO) does not cause the model to go out of control. Telemetry data, such as the voltage of the airborne power supply, are only sent to the transmitter by the satellite receiver (configured as SUMO), i. e. all telemetry sensors must be connected to the satellite receiver (SUMO). Each receiver should be connected to the shared power supply using its own power lead. If high currents can be expected, duplicated power connections are recommended. However, if each of the two receivers is to be powered by its own battery, then it is red essential to withdraw the central (red) wire from one of the two sat3 ellite lead connectors, as shown in the illustration. If you wish to carry out further programming, such as the Fail-Safe settings, disconnect the three-core satellite connection between the two receivers, and switch on just the receiver you wish to address. Note that you may also need to change the binding sequence. Program description: Telemetry menu 127 33112_mx12_HoTT_2_GB.indd Abs45:127 06.06.2011 19:39:43 SIMPLE DATA VIEW SIMPLE DATA VIEW Select the desired menu line using the arrow buttons cd of the left or right-hand four-way button … TELEMETRY SETTING & DATA VIEW SIMPLE DATA VIEW RF STATUS VIEW VOICE TRIGGER … and then press the central SET button of the righthand four-way button to bring up a list of further submenus. SIMPLE DATA VIEW RECEIVER RX+GENERAL MODUL RX+ELECTRIC AIRMODUL RX+VARIO MODUL RX+GPS CH OUTPUT TYPE:ONCE RECEIVER RX–S QUA: 100% RX–S ST : 100% RX–dBm: 33dBm TX–dBm: 33dBm V–PACK: 10ms RX–VOLT:4.8 TMP CHM–RX OUTPUT TYPE:ONCE V :4.6 +22°C This screen displays the data which can also be viewed in the “RX DATAVIEW” screen of the telemetry menu “SETTING & DATA VIEW”, but in graphic form. The meanings are as follows: Value Explanation RX-S QUA Signal quality in % RX-S ST Signal strength in % RX-dBm Receive performance in dBm TX-dBm Transmit power in dBm V PACK shows the longest period in ms in which data packets were lost in transmission from transmitter to receiver RX-VOLT Current receiver operating voltage in Volt M-RX V Lowest receiver operating voltage in Volt since the last time it was switched on TMP The thermometer indicates the receiver’s current operating temperature RX + GENERAL MODUL BAT1 E FUEL F 0.0V T1 +20°C BAT2 0.0V T2 +20°C CELL V 1:0.00 2:0.00 3:0.00 4:0.00 5:0.00 6:0.00 ALT +500m 0m1 BAT1 E FUEL F 0m3 0.0V CURRE. T1 +20°C 0.0A POWER BAT2 0.0V 0.0V T2 +20°C If a General Engine module, Order No. 33610, or a General Air module, Order No. 33611, is connected to the receiver, then this screen provides a graphic display of the data supplied by it. For more information on these modules please see the Appendix, or refer to the product on the Internet at www.graupner.de. Depending on the types of sensor fitted to the modules, the display constantly shows the following data: The actual voltage of up to two rechargeable batteries (BAT1 and BAT2); the measured values from up to two temperature sensors (T1 and T2) and a fueltank level indicator. At the right-hand edge the screen shows either an alternating list of the actual cell voltages of a LiPo battery with up to six cells, or the current altitude relative to the location, climb / descent in m/1sec and m/3sec, current in Ampere plus the actual voltage of the battery connected to the sensor. 128 Program description: Telemetry menu 33112_mx12_HoTT_2_GB.indd Abs45:128 06.06.2011 19:39:43 The meanings are as follows: Value Explanation BAT1 / BAT2 Battery 1 / Battery 2 FUEL Fuel level / Fueltank indicator E/F Empty / full T1 / T2 Temperature of sensor 1 / sensor 2 CELL V Cell voltage of cell 1 … max. 6 ALT Current altitude 0m1 m/1 sec climb / descent 0m3 m/3 sec climb / descent CURRE. Actual current in Ampere POWER Actual voltage of drive battery RX + ELECTRIC AIRMODUL 0.0V 0A ALT +500m BAT1 0m/1s 0.0V 0m/3s T1 +20°C BAT2 0.0V T2 +20°C 0.0V 0A ALT +500m BAT1 0m/1s 0.0V 0m/3s T1 +20°C BAT2 0.0V T2 +20°C CELL V 1L0.00 2L0.00 3L0.00 4L0.00 5L0.00 6L0.00 7L0.00 CELL V 1H0.00 2H0.00 3H0.00 4H0.00 5H0.00 6H0.00 7H0.00 on this module please see the Appendix, or refer to the product on the Internet at www.graupner.de. Depending on the types of sensor fitted to the module, the display constantly shows the following data: The actual voltage of up to two rechargeable batteries (BAT1 and BAT2); the measured values from up to two temperature sensors (T1 and T2); the current altitude relative to the location, and the climb / descent of the model in m/1sec and m/3sec; the centre of the screen also displays the current actually being drawn from a power source. At the right-hand edge the screen shows an alternating display of the actual cell voltages of the battery packs (max. seven cells each) connected to balancer sockets 1 (L) or 2 (H). The meanings are as follows: RX + VARIO m/1s ALT +500 m/3s m/10s RXSQ MAX +500m MIN +500m If a Vario module, Order No. 33601, is connected to the receiver, then this screen provides a graphic display of the data supplied by it. For more information on this module please see the Appendix or refer to the product on the Internet at www.graupner.de. The meanings are as follows: Value Explanation ALT Current altitude RXSQ Signal strength of the signal picked up by the receiver in % MAX The pre-set altitude limit relative to the launch point; above this altitude the transmitter emits audible warning signals MIN The pre-set altitude limit below the launch point; below this altitude the transmitter emits audible warning signals Value Explanation Actual voltage Actual current BAT1 / BAT2 Battery 1 / Battery 2 ALT Current altitude m/1s m/1 sec climb / descent m/3s m/3 sec climb / descent T1 / T2 Temperature from sensor 1 / 2 CELL.V Cell voltage of cell 1 … max. 14 Balancer socket 1 m/1s m/1 sec climb / descent Balancer socket 2 m/3s m/3 sec climb / descent m/10s m/10 sec climb / descent If an Electric-Air module, Order No. 33620, is connected to the receiver, then this screen provides a graphic display of the data supplied by it. For more information Program description: Telemetry menu 129 33112_mx12_HoTT_2_GB.indd Abs45:129 06.06.2011 19:39:44 RF STATUS VIEW RX + GPS Kmh RXSQ DIS 0m ALT +500m 0m/1s 0m/3s 0m/10s 0°00.0000 0°00.0000 If a GPS module with integral vario, Order No. 33600, is connected to the receiver, then this screen provides a graphic display of the data supplied by it. For more information on this module please see the Appendix, or refer to the product on the Internet at www.graupner.de. The centre of the screen shows the current positional data and the model’s speed; the display also shows the model’s current altitude in relation to the launch point, its climb / descent rate at m/1 sec, m/3 sec and m/10 sec, the current reception quality and the model’s range from the launch point. The meanings are as follows: Value Explanation W/N/E/S West / North / East / South Kmh Speed RXSQ Signal strength of downlink channel DIS Distance ALT Current altitude relative to launch point m/1s m/1 sec climb / descent m/3s m/3 sec climb / descent m/10s m/10 sec climb / descent RF STATUS VIEW Select the desired menu line with the arrow buttons cd of the left or right-hand four-way button … TELEMETRY SETTING & DATA VIEW SIMPLE DATA VIEW RF STATUS VIEW VOICE TRIGGER … and then press the central SET button of the righthand four-way button to open the selected sub-menu: R100% S 95% TD 22 Signal quality in % for the signal arriving at the receiver TD Reception performance in dBm Number of lost receiver data packets RD Reception performance in dBm of the signal picked up by the receiver VC Actual receiver operating voltage in Volt VM Lowest receiver operating voltage in Volt since the last time it was switched on 10 RD 41 4.8VC 4.8VM 0123456789ABCDE Top row: receive performance in dBm of channels 1 ... 75 on the 2.4 GHz band. Bottom row: receive performance in dBm of the signal of channels 1 ... 75 on the 2.4 GHz band, as picked up by the receiver. This screen provides a graphic display of data showing the occupation of the 2.4 GHz band. As well as the graphic depiction of band occupation, additional numeric information is generated to the left of the graphs. The meanings are as follows: Value Explanation Signal quality in % for the signal arriving from the receiver 130 Program description: Telemetry menu 33112_mx12_HoTT_2_GB.indd Abs45:130 06.06.2011 19:39:44 VOICE TRIGGER VOICE TRIGGER First select the desired menu line using the arrow buttons cd of the left or right-hand four-way button … TELEMETRY SETTING & DATA VIEW SIMPLE DATA VIEW RF STATUS VIEW VOICE TRIGGER … then press the central SET button of the right-hand four-way button to open the selected sub-menu: REPEAT VOICE TRIGGER REPEAT 1SEC TRIG VARIO TRANSFER RECEIVER ––– ––– ––– Speech output is available via the headphone socket, but not until you have at least assigned a switch in the “REPEAT” line. This is accomplished as described in the section entitled “Assigning switches and control switches” on page 39: VOICE TRIGGER REPEAT 1SEC ––– push desired switch TRIG ––– VARIO into position ON ––– TRANSFER RECEIVER VOICE TRIGGER REPEAT 1SEC TRIG VARIO TRANSFER RECEIVER ––– ––– All the time the assigned switch is closed, the last speech output is repeated for the period set to the left of the switch. TRIG Using a switch assigned to this line - preferably the momentary switche SW 1 - you can cycle through the speech outputs selected under the “TRANSFER”, “RECEIVER” and “SENSOR” options, as described in the following section. VOICE TRIGGER REPEAT 1SEC TRIG VARIO TRANSFER RECEIVER ––– VARIO If you assign a switch in this line, and activate the “RX + VARIO” sub-menu of the “DISPLAY DATA” menu as described on the next page under “Sensor”, you can use a switch assigned in this line to call up vario-specific outputs (i. e. those triggered by height changes, such as “slow climb / descent” etc.) via the optional headphone socket, Order No. 33001.71 - completely independently of the other speech outputs. VOICE TRIGGER REPEAT 1SEC TRIG VARIO TRANSFER RECEIVER TRANSFER Select the desired menu line using the arrow buttons cd of the left or right-hand four-way button … VOICE TRIGGER REPEAT 1SEC TRIG VARIO TRANSFER RECEIVER … then briefly press the central SET button of the righthand four-way button to open the selected sub-menu: VOLT: MODELTIME: BATTERYTIME: STOPWATCH: RUNTIME: TIME: In this menu you can select ( ) or de-select ( ) the chosen speech output after using the arrow buttons cd of the left or right-hand four-way button to select the desired line, followed by a brief press of the central SET button of the right-hand four-way button: Program description: Telemetry menu 131 33112_mx12_HoTT_2_GB.indd Abs45:131 06.06.2011 19:39:44 VOLT: MODELTIME: BATTERYTIME: STOPWATCH: RUNTIME: TIME: RECEIVER Select the desired menu line with the arrow buttons cd of the left or right-hand four-way button … VOICE TRIGGER REPEAT 1SEC TRIG VARIO TRANSFER RECEIVER desired line. TEMP: STRENGTH: VOLT: LOWVOLT: … then press the central SET button of the right-hand four-way button to call up the selected sub-menu: TEMP: STRENGTH: VOLT: LOWVOLT: In this menu you can select ( ) or de-select ( ) the chosen speech output after using the arrow buttons cd of the left or right-hand four-way button to select the desired line, followed by a brief press of the central SET button of the right-hand four-way button: Note: The voice output you select here is completely independent of the “VARIO” outputs. SENSOR This line only appears if you have already activated one of the “RX …” sub-menus of the “SIMPLE DATA VIEW” menu, and then returned directly to the “VOICE TRIGGER” menu: VOICE TRIGGER REPEAT 1SEC TRIG VARIO TRANSFER RECEIVER SENSOR For example, if you selected the “RX + VARIO” option, then selected the “SENSOR” line and pressed the central SET button of the right-hand four-way button, you will see the display shown below: ALT : MAXALT : MINALT : VOLT MINIMUM: As described in the left-hand column, you can also select ( ) or de-select ( ) any available speech output by briefly pressing the central SET button of the right-hand four-way button after you have selected the 132 Program description: Telemetry menu 33112_mx12_HoTT_2_GB.indd Abs45:132 06.06.2011 19:39:44 For your notes 133 33112_mx12_HoTT_2_GB.indd Abs52:133 06.06.2011 19:39:44 Trainer Mode Connecting two transmitters for trainer mode operations using a Trainer lead Use the arrow buttons of the left or right-hand four-way button to leaf through to the “Trainer” menu point of the multi-function menu: ser vo set. D/R expo wing mixer ser vo disp fail-safe teach/pupi ser vo set. D/R expo free mixer ser vo disp fail-safe teach/pupi contr set. phase trim free mixer basic sett telemetr y info disp contr set. heli mixer swashp.mix basic sett telemetr y info disp Press the central SET button of the right-hand four-way button to open the menu: TRAINER/Pupil –P 1 2 3 4 5 6 N/A SW: ––– BIND: The illustration above shows the initial state of this menu: transmitter controls have not been released ( ) to the pupil, and a switch has not been assigned (SW: --at bottom right and -P on the left of the display). Teacher transmitter settings Up to six transmitter control functions of the Teacher transmitter “T” can be transferred individually or in any combination to the pupil transmitter “P”. The lower line of the display marked “T” therefore indicates those transmitter controls which are permanently connected to the inputs Ch 1, AIL, ELE and RUD (dual-axis stick functions, fixed-wing model) or 1 … 4 (dual-axis stick functions, model helicopter). Notes: • This means that the rotary proportional knobs CTRL 7 and 8, and the three-position switches SW 4/5 and 6/7, designated CTRL 9 and 10, explicitly CANNOT be transferred. • Transmitter controls can only be assigned in the “Transmitter control settings” menu when the Trainer connection is switched off. Use the arrow buttons ef of the left or right-hand four-way button to select the transmitter controls 1 to 6 (z) to be transferred to the pupil, and briefly press the central SET button of the right-hand four-way button in each case, so that they switch from “T (Teacher)” ( ) to “P (Pupil)” ( ): TRAINER/Pupil –P 1 2 3 4 5 6 N/A SW: ––– BIND: You still have to assign a Trainer transfer switch on the right of the screen so that you can actually transfer control to the Pupil. This is accomplished by using the arrow buttons of the left or right-hand four-way button to place the marker next to “SW” at bottom right, and assign a switch as described on page 39. We recommend that you use the momentary switch SW 1 as the transfer switch, to ensure that the Teacher transmitter can regain control instantly at any time. TRAINER/Teach ¿P 1 2 3 4 5 6 N/A SW: 1 BIND: Note: The switch assignment procedure described above determines which transmitter provides the Teacher function, and which provides the Pupil function. For this reason a switch must NEVER be assigned to the Pupil transmitter in this menu. To underline this, the menu headline switches from “TRAINER / pupil” to “TRAINER / teacher” as soon as a switch is assigned. The model to be controlled by the pupil must be programmed completely in a model memory of the mx12 HoTT Teacher transmitter, i. e. with all its functions including trims and any mixer functions. The HoTT receiver in the model must also be “bound” to the Teacher transmitter, since it is this transmitter which actually controls the model in Pupil mode, even in Trainer operations. The mx-12 HoTT Teacher transmitter MUST ALWAYS BE SWITCHED ON FIRST. ONLY THEN MAY THE CONNECTING LEAD BE PLUGGED INTO IT. If you neglect this, the RF module will not be activated. 134 Program description: Trainer system 33112_mx12_HoTT_2_GB.indd Abs41:134 06.06.2011 19:39:44 The mx-12 HoTT Teacher transmitter can be linked to any suitable Pupil transmitter - even those operating on the “classic” 35 / 40 MHz band. For example, an mx12 HoTT Teacher transmitter can certainly be used in conjunction with an mx-12s Pupil transmitter. However, if the connection at the pupil end is NOT made using a two-pole DSC socket, but instead - for example - using a three-pin Trainer socket from the Graupner range, the basic requirement for a correct connection with a Pupil transmitter is that PPM (18 or 24) modulation must ALWAYS be set on the Pupil transmitter, regardless of the modulation used by the Teacher transmitter. Pupil transmitter settings The model to be controlled by the pupil must be programmed completely in a model memory of the Teacher transmitter, i. e. with all its functions including trims and any mixer functions, and the HoTT receiver in the model must be “bound” to the Teacher transmitter. In principle, however, an mx-12 HoTT Pupil transmitter can also be linked to a Teacher transmitter operating on the “classic” 35 / 40 MHz band, since the PPM signal required from the Teacher transmitter is present at the transmitter’s DSC socket. The Pupil transmitter can be virtually any transmitter from the former and current Graupner range with at least four control functions. More information on this is available in the main FS catalogue, and on the Internet under www.graupner.de. Some transmitters will need to be retro-fitted with the appropriate module in order to act as the Pupil transmitter. This should be connected to the transmitter circuit board as described in the installation instructions supplied in the set. Information on the Pupil module required can be found in the main Graupner FS catalogue and on the Internet at www.graupner.de. The Pupil transmitter must be connected to the Teacher transmitter using the appropriate lead - see next double page. The control functions of the Pupil transmitter MUST act directly on the control channels, i. e. the receiver outputs, without the intervention of any mixers. If you are using an “mc” or “mx” series transmitter, it is best to set up a free model memory in the Pupil transmitter with the required model type (“Fixed-wing” or “Helicopter”). Assign the model name “Pupil” to the memory, and set up the stick mode (Mode 1 … 4) and “Throttle min. forward / back” to suit the pupil’s preference. All the other settings should be left at the appropriate default values. If you select the “Helicopter” model type, the throttle / collective pitch direction and idle trim must also be set accordingly on the Pupil transmitter. All other functions, including mixer and coupling functions, are carried out by the Teacher transmitter, which transmits them to the receiver in the model. If you are using a “D” or “FM” type transmitter, you should check the servo directions and stick mode, and alter them by re-connecting the appropriate leads if required. All mixers should be switched off or set to “zero”. When assigning the control functions the usual conventions should be observed: Channel Function Throttle / Collective pitch Aileron / Roll Elevator / Pitch-axis Rudder / Tail rotor If you wish to transfer other control functions to the Pupil transmitter, in addition to the functions of the two dual-axis sticks (1 … 4), then you will need to assign additional transmitter controls in the Pupil transmitter’s “Transmitter control settings” menu to those inputs which correspond to transmitter control numbers 5 and / or 6, as released in the Teacher transmitter’s “Trainer” menu. Important: • If you forget to assign a transmitter control, then the servo or servos concerned will remain in the centre position when control is transferred to the Pupil transmitter. • The Pupil transmitter must always be operated in PPM mode, regardless of the type of RF link between the Teacher transmitter and the model. • If the Pupil transmitter is connected using a DSC socket, then you should ALWAYS leave the Pupil transmitter’s On / Off switch at the “OFF” position, as this is the only way to ensure that the Pupil transmitter module does not generate an RF signal even when the DSC lead is plugged in. Trainer mode operations Connect the two transmitters using the appropriate lead; see the overview on the next page: connect the plug marked “M” (Master) to the socket on the Teacher transmitter, and the plug marked “S” (Student) (not present on all leads) to the appropriate socket on the Pupil transmitter. Program description: Trainer system 135 33112_mx12_HoTT_2_GB.indd Abs41:135 06.06.2011 19:39:44 Important note regarding three-pole barrel connectors: If you are using a Trainer lead with three-pole barrel connectors, on no account connect one of the ends marked “S” or “M” to a DSC system socket, as it is not suitable for this purpose. The DSC socket is only suitable for leads fitted with two-pole barrel connectors. Checking the system Operate the assigned Trainer transfer switch: • If the screen display changes from „¾T“ to „¾P“, the Trainer system is working properly. • However, if both the “Trainer” menu and the transmitter’s basic display show the following warning message … no student signal … and the display “-P” appears on the left of the screen in the “Trainer” menu, and at the same time the transmitter emits audible signals, then there is a problem with the connection between Pupil and Teacher transmitter. If this should happen, note that all the functions remain under the control of the Teacher transmitter, regardless of the position of the Trainer transfer switch; this ensures that the model is not out of control at any time. Possible errors: • Pupil transmitter not ready • The interface in the Pupil transmitter, which replaces the RF module, is not connected correctly • Incorrect cable connection: see next section for cable selection • Pupil transmitter not set to PPM (10, 18, 24) mode. Further possible errors: • Teacher transmitter and HoTT receiver in trainer model not correctly “bound”. Trainer leads 4179.1 For Trainer mode operations between any two Graupner transmitters equipped with a DSC socket - identifiable by two-pole barrel connectors at both ends. 3290.7 Trainer lead for connecting a Teacher transmitter with DSC socket (e. g. mx-12 HoTT), or a transmitter retro-fitted with the optional DSC module, Order No. 3290.24, to a Graupner Pupil transmitter with opto-electronic Pupil socket - identifiable by the letter “S” at the end with the three-pole barrel connector. 3290.8 Trainer lead for connecting a Pupil transmitter with DSC socket (e. g. mx-12 HoTT) or a transmitter retro-fitted with the optional DSC module, Order No. 3290.24, to a Graupner Teacher transmitter with opto-electronic Teacher socket - identifiable by the letter “M” at the end with the three-pole barrel connector. For more detailed information about the leads and modules for the Teacher and Pupil transmitters listed on this page, please refer to the operating instructions supplied with your transmitter, the main Graupner FS catalogue, or the Internet at www.graupner.de. 136 Program description: Trainer system 33112_mx12_HoTT_2_GB.indd Abs41:136 06.06.2011 19:39:44 Trainer mode operations with the mx-12 HoTT transmitter Due to the constant expansion of our range of products please visit the Internet at www.graupner.de for the latest information. mx-12 HoTT Teacher transmitter ter mx-12 HoTT Pupil transmitter mitter Trainer lead, Order No. 4179.1 Trainer lead, Order No. 3290.8 Trainer lead, Order No. 3290.7 Trainer lead, Order No. 4179.1 Teacher transmitter with DSC socket Teacher transmitter with Teacher module Order No. 3290.2, 3290.19, 3290.22 mx-12(s)HoTT, mx-16s/iFS/ mc-19 to mc-24, mx-22(iFS), HoTT, mx-22(iFS), mx-24s and, mx-24s if fitted with DSC socket, Order No. 3290.24, mc-19(s + iFS), mc-22(s + iFS) and mc-24 Pupil transmitter with Pupil module Order No. 3290.3, 3290.10, 3290.33 Pupil transmitter with DSC socket mx-12(s)HoTT, mx-16s/iFS/ HoTT, mx-22(iFS), mx-24s and, if fitted with DSC socket, Order No. 3290.24, mc-19(s + iFS), mc-22(s + iFS) and mc-24 D 14, FM 414, FM 4014, FM 6014, mc-10 … mc-24, mx-22(iFS), mx-24s Note: These lists represent the transmitters and transmitter combinations which are possible at time of going to press. Program description: Trainer system 137 33112_mx12_HoTT_2_GB.indd Abs41:137 06.06.2011 19:39:44 Wireless HoTT system Two HoTT transmitters can also be combined by wireless means to form a Trainer system as an alternative to the “classic” system using a Trainer lead, as described on the preceding pages. Preparations The trainer model must be programmed completely, i. e. with all its functions including trims and any mixer functions, both in a model memory of the mx-12 HoTT Pupil transmitter and also in the mx-12 HoTT Teacher transmitter. This means that it must be possible to control the trainer model fully, without restriction, by both transmitters, i. e. by the Teacher and the Pupil transmitters. It is very important to avoid any major set-up differences, otherwise there is a risk that the servos will jump abruptly from one position to another when control is transferred between the Teacher and Pupil transmitters, which can place a severe strain on the servos. Nevertheless, it may be sensible to program smaller control surface travels on the Pupil model at least, as this makes it easier to learn the basic skills of model flying. Once both transmitters are prepared for training operations as described above, the trainer model should be bound to the Pupil transmitter. A detailed description of the binding procedure can be found on pages 61 and 70. Binding the Teacher and Pupil transmitters Switch both transmitters on, and use the arrow buttons of the left or right-hand four-way button to leaf through on both transmitters to the “Trainer” menu point of the multi-function menu. (The trainer model’s receiving system, previously bound to the Pupil transmitter, does not need to be switched on during the following procedure.) ser vo set. D/R expo wing mixer ser vo disp fail-safe teach/pupi contr set. phase trim free mixer basic sett telemetr y info disp ser vo set. D/R expo free mixer ser vo disp fail-safe teach/pupi contr set. heli mixer swashp.mix basic sett telemetr y info disp Press the central SET button of the right-hand four-way button to open the following menu point: TRAINER/Pupil –P 1 2 3 4 5 6 N/A SW: ––– BIND: The illustration above shows the initial state of this menu: no transmitter controls have been released to the Pupil ( ), and no switches have been assigned (SW: --bottom right and -S on left of illustration). Pupil transmitter Use the arrow buttons of the left or right-hand four-way button to move the marker / cursor to the input field marked “Bind”. If a switch is displayed adjacent to “SW” on the right, then it is essential to erase this: see the following illustration: TRAINER/Pupil –P 1 2 3 4 5 6 SW: ––– BIND: N/A Teacher transmitter Press the central SET button of the right-hand four-way button to release the control channels to be transferred to the Pupil. When you do this, the corresponding symbol changes from to . For example: TRAINER/Pupil –P 1 2 3 4 5 6 N/A SW: ––– BIND: Important Note: In contrast to the wired Trainer system described in the previous section, in which TRANSMITTER CONTROL SIGNALS are released to the Pupil exclusively, it is CONTROL CHANNELS which are transferred when using the wireless HoTT system which is described in this section. For example, if the aileron function (2) is to be transferred, and if the model is equipped with two aileron servos which are usually connected to receiver sockets 2 and 5, then in the wireless system control channels 2 and 5 must also be transferred, and not just - as with the wired system - number 2; see illustration above. The same applies to flap servos connected to 6 and 1 (“2AIL 138 Program description: Trainer system 33112_mx12_HoTT_2_GB.indd Abs41:138 06.06.2011 19:39:45 2FL” setting in the “Basic settings” menu), or two elevator servos connected to 3 and 6 (“2Sv EL” setting in the “Basic settings” menu). You still have to assign a Trainer transfer switch on the right of the screen so that you can actually transfer control to the Pupil. This is accomplished by using the arrow buttons of the left or right-hand four-way button to place the marker next to “SW” at bottom right, and assign a switch as described on page 39. We recommend that you use the momentary switch SW 1 as the transfer switch, to ensure that the Teacher transmitter can regain control instantly at any time. TRAINER/Teach ¿P 1 2 3 4 5 6 N/A SW: 1 BIND: TRAINER/Teach … and immediately afterwards that of the Teacher transmitter: ¿T TRAINER/Teach 1 2 3 4 5 6 N/A SW: 1 BIND: Binding the Pupil transmitter to the Teacher transmitter Note: During the binding procedure the distance between the two transmitters should not be too great. You may need to change the relative position of the two transmitters and initiate the binding process a second time. If necessary, close the Trainer transfer switch which you have just assigned … ¿P 1 2 3 4 5 6 SW: 1 BIND: BINDING As soon as this process is concluded, both screens display “ON” instead of the flashing message “BINDING”: TRAINER/Teach ¿P 1 2 3 4 5 6 SW: 1 BIND: ON TRAINER/Teach TRAINER/Pupil Note: The switch assignment procedure described above determines which transmitter provides the Teacher function, and which provides the Pupil function. For this reason a switch must NEVER be assigned to the Pupil transmitter in this menu. To underline this, the menu headline switches from “TRAINER / pupil” to “TRAINER / teacher” as soon as a switch is assigned. Now use the arrow buttons of the left or right-hand four-way button to move the marker to “BIND: N/A” on the right: ¿P 1 2 3 4 5 6 N/A SW: 1 BIND: … and start the “BINDING” process first at the Pupil transmitter by pressing the central SET button of the right-hand four-way button … TRAINER/Pupil –P 1 2 3 4 5 6 SW: ––– BIND: BINDING –P 1 2 3 4 5 6 SW: ––– BIND: ON This concludes the binding process, and you can return to the basic display of both transmitters, and start trainer mode operations - once you have checked the operation of all the functions. However, if neither transmitter, or only one of the transmitters, displays “ON”, indicating that the binding procedure has failed, try changing the relative position of the two transmitters, and repeat the whole procedure. During … Program description: Trainer system 139 33112_mx12_HoTT_2_GB.indd Abs41:139 06.06.2011 19:39:45 Trainer mode operations … it is no problem for the Teacher and Pupil to stand a little way apart. However, you should never exceed a distance of 50 m (this is known as the call range), and no other persons should stand between the Teacher and Pupil, as this could reduce the effective range. Please note also that the wireless Trainer function exploits the downlink connection, and for this reason no telemetry data are transmitted from the model in this mode. In this mode of operation the basic display of the Teacher transmitter looks like this … GRAUBELE #01 RFC–Teach 5.2V 51% 2:22h 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V … and that of the Pupil transmitter typically like this: GRAUBELE #09 RFC-Pupil 4.9V 33% 1:11h 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V If it should occur that the link between the Teacher and Pupil transmitters is lost during Trainer mode operations, note that the Teacher transmitter automatically assumes control of the model. In this situation, if the Trainer change-over switch is in the “Pupil” position, then the central LED on the Teacher transmitter starts to flash blue / red for the duration of the signal loss, and the transmitter emits audible warn- ing signals. At the same time “RFC-” flashes in the basic display, and the following warning is displayed: no student signal However, if only “RFC-” flashes in the basic transmitter display, and - relatively quiet - audible signals are heard … GRAUBELE #01 RFC–Teach 5.2V 51% 2:22h 0:00 stop flt 0:00 «normal » K78 HoTT 5.5V … then this indicates that the Pupil signal has also been lost, but the Trainer transfer switch is in the “Teacher” position. In either situation your first recourse should be to reduce the distance between the two transmitters. If this does not help, land the model immediately, and seek the cause. However, if both transmitters are operating with the receiving system switched off, then the “familiar” symbol appears in the basic display of the Teacher transmitter instead of the two symbols. TRAINER Wireless Link ACT INH Press the central SET button of the right-hand four-way button to confirm “ACT(ivate)”, or alternatively wait for about two seconds until the message disappears; the last link you created with a Teacher or Pupil transmitter is now restored. However, if you select “INH(ibit)” using one of the arrow buttons of the left or right-hand four-way button … TRAINER Wireless Link ACT INH … and confirm your choice by pressing the central SET button of the right-hand four-way button, this resets that transmitter to “normal” operation. In this case you will have to repeat the binding process with a Teacher or Pupil transmitter as and when required. Resuming Trainer mode operations If - for whatever reason - one or both transmitters are switched off during a Trainer mode session, then the screen displays the following query when the transmitter or transmitters are switched on again: 140 Program description: Trainer system 33112_mx12_HoTT_2_GB.indd Abs41:140 06.06.2011 19:39:45 For your notes 141 33112_mx12_HoTT_2_GB.indd Abs53:141 06.06.2011 19:39:45 Info Display Date, time, transmitter ID and memory card Use the arrow buttons of the left or right-hand four-way button to leaf through to the “info disp” menu point of the multi-function menu: ser vo set. D/R expo wing mixer ser vo disp fail-safe teach/pupi contr set. phase trim free mixer basic sett telemetr y info disp ser vo set. D/R expo free mixer ser vo disp fail-safe teach/pupi contr set. heli mixer swashp.mix basic sett telemetr y info disp Press the central SET button of the right-hand four-way button to open the menu point: ABCDEF12 RFID 1.11 firmware ver. 0MB SD-CARD 0MB available 0% This menu displays transmitter-specific information, some of which can be altered where necessary and sensible. Use the arrow buttons cd of the left or right-hand fourway button to select the appropriate line, then press the central SET button of the right-hand four-way button. In the highlighted value field you can now alter the default value using the arrow buttons of the right-hand four-way button, and conclude your input with a further press of the central SET key. SD card ABCDEF12 RFID 1.11 firmware ver. 2048MB SD-CARD 1234MB available 60% RFID ABCDEF12 RFID 1.11 firmware ver. 0MB SD-CARD 0MB available 0% This line displays the transmitter’s identification number. This number is specific to the transmitter, and is only issued once for each transmitter. During the binding process this ID is transmitted to the receiver (amongst other data), so that it is able at any time to identify the radio signals of “its” transmitter. Firmware version ABCDEF12 RFID 1.11 firmware ver. 0MB SD-CARD 0MB available 0% This line displays the version number of the transmitter software currently installed. By comparing the number shown here with the update version available for the same product on the Internet at www.graupner.de you can judge whether an update to the transmitter’s operating system is necessary and useful. In some circumstances our Service department may also ask you for the version number. This line displays the storage capacity in MB of a memory card installed in the transmitter. Depending on the memory capacity of the micro-SD or micro-SDHC memory card fitted in the transmitter, it may take several minutes for the display to show the correct value after you switch the transmitter on. available ABCDEF12 RFID 1.11 firmware ver. 2048MB SD-CARD 1234MB available 60% Display of the available memory in MB. As already mentioned, it may take a certain amount of time for the available memory to be displayed after you switch the transmitter on, depending on the total capacity of the installed memory card. The next line down displays the available memory in relation to the total memory capacity: 142 Program description: Info display 33112_mx12_HoTT_2_GB.indd Abs43:142 06.06.2011 19:39:45 ABCDEF12 RFID 1.11 firmware ver. 2048MB SD-CARD 1234MB available 60% As already mentioned, it may take a certain amount of time for the available memory to be displayed after you switch the transmitter on, depending on the total capacity of the installed memory card. Program description: Info display 143 33112_mx12_HoTT_2_GB.indd Abs43:143 06.06.2011 19:39:46 mx-12 HoTT programming techniques Preparation, using a fixed-wing model aircraft as an example Programming model data into an mx-12 HoTT … … is easier than it might appear at first sight. There is one basic rule which applies equally to all programmable radio control transmitters, and not just to the mx-12 HoTT: if the programming is to go “smoothly” and the systems work as expected, the receiving system components must first be installed correctly in the model, i. e. the mechanical systems must be first-rate. This means: ensure that each servo is at its correct neutral position when you fit the output lever or disc and connect the linkage to it. If you find this is not the case, correct it! Remove the output arm, rotate it by one or more splines and secure it again. If you use a servo tester, e. g. the RC-Tester, Order No. 2894.12, to centre the servos, you will find it very easy to find the “correct” position. Virtually all modern transmitters offer facilities for offsetting the neutral position of servos, but this is no substitute for a correct mechanical installation; this function is only intended for fine tuning. Any substantial deviation from the “0” position may result in additional asymmetry when the signal undergoes further processing in the transmitter. Think of it this way: if the chassis of a car is distorted, you may be able to force the vehicle to run straight by holding the steering wheel away from centre, but it does not make the chassis any less bent, and the basic problem remains. Another important point is to set up the correct control travels wherever possible by using the appropriate linkage points in the mechanical system; this is much more efficient than making major changes to the travel settings at the transmitter. The same rule applies: electronic travel adjustment facilities are designed primarily to compensate for minor manufacturing tolerances in the servos and for fine adjustment, and not to compensate for poor-quality construction and defective installation methods. If two separate aileron servos are installed in a fixedwing model aircraft, the ailerons can also be employed as flaps by deflecting both of them down, and as airbrakes by deflecting both of them up - simply by setting up a suitable mixer (see the section starting on the next double page). Such systems are generally more often used in gliders and electric gliders than in power models. braking effect of the crow system is provided primarily by the down-movement of the flaps rather than the up-movement of the ailerons, so in this case the servo output arms should be angled aft, i. e. offset towards the trailing edge of the wing, as this makes greater travel available for the down-movement. When this combination of lowered flaps and raised ailerons is used, the ailerons should only be raised by a moderate extent, as their primary purpose in this configuration is to stabilise and control the model rather than act as brakes. You can “see” the difference in terms of braking effect by deploying the crow system, then looking over and under the wing from the front: the larger the projected area of the deflected control surfaces, the greater the braking effect. Outboard ailerons In such cases the servo output arms should be offset forward by one spline relative to the neutral point, i. e. towards the leading edge of the wing, and fitted on the servo output shaft in that position. The mechanical differential achieved by this asymmetrical installation takes into account the fact that the braking effect of the up-going ailerons increases with their angle of deflection, and this means that much less travel is usually required in the down-direction than the up-direction. Similar reasoning applies to the installation of the flap linkage when separately actuated flap servos are installed, designed to be used in a butterfly (crow) system. Here again an asymmetrical linkage point is useful. The Inboard camber-changing flaps (This type of asymmetrical installation of the servo output arms can also make sense when you are setting up split flaps or landing flaps on a power model.) Once you have completed your model and set up the mechanical systems accurately in this way, you are ready to start programming the transmitter. The instructions in this section are intended to reflect standard practice by describing the basic general settings first, and then refining and specialising them to complete the set-up. After the initial test-flight, and in the course of continued test-flying, you may need to adjust one or oth- 144 Programming example - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs42:144 06.06.2011 19:39:46 er of the model’s settings. As your piloting skills improve and you gain experience, it is very likely that you will feel the need to try out refinements such as expanded control systems, and to cater for these requirements you may find that the text deviates from the obvious order of options, or that one or other of the options is mentioned more than once. On the other hand, it can certainly occur that not every step described in these instructions is relevant to a particular model, just as some users might miss the description of a particular step which is relevant to his model only … Regardless of all this, it is worthwhile thinking carefully about a sensible layout of the transmitter controls at this point, just before you start programming the model data. If the model in question is one with the emphasis on “power” - whether the power of an electric motor or internal-combustion engine (glow motor) - you will probably encounter few problems in this matter, because the two stick units are primarily employed to control the four basic functions “power control (= throttle)”, “rudder”, “elevator” and “aileron”. Nevertheless, you still have to call up the … “Basic settings” menu (pages 56 … 62) GRAUBELE mod name stick mode no motor at C1 tail type normal aile/flap 1aile … and define your preferred throttle direction, i. e. throttle minimum forward (“Idle forward”) or back (“Idle back”), because the program’s default setting is “none” (i. e. no motor) when you first set up a model memory. The basic difference between “none” or “none/inv” and “throttle min. forward / back” is the effect of the Ch 1 trim. The trim is effective over the full stick travel if “none (/ inv)” is entered, but it only affects the idle range if you enter “throttle min. forward or back”. However, it also affects the “direction of effect” of the Ch 1 stick, i. e. if you switch from “forward” to “back” or vice versa, you do not also have to reverse the direction of the throttle (or brake) servo. For safety reasons you will also see a warning message, and hear an audible warning, if you switch the transmitter on with the throttle stick positioned towards “full-throttle” - but only if you have already set “throttle min. forward or back”. 0:00 GRAUBELE stop #01 0:00 throttle Flug too HoTT 5.2V 50% highK78 0.0V 0:33h Your choice of “none” (no motor) or “throttle min. forward or back” also affects the range of mixers available in the “Wing mixers” menu. The mixers “Brake ¼ NN *” are only present if you choose “none” (no motor) or “none/ inv”; otherwise they are suppressed. The same applies to the selection facilities in the “Aileron / flap” line of the “Basic settings” menu: “2AL 2FL”, and the associated mixers in the “Wing mixer” menu, are only available if you select “none” (no motor) or “none/inv”, otherwise they are also suppressed. (In this case the second flap servo should be connected to receiver output 1 instead of the throttle servo. In addition to these basic matters you will certainly need to consider carefully how best to control any “auxiliary functions” present on your model. In contrast, if your model is a glider or electric glider the whole situation may be rather different. The immediate question is: what is the best way of operating the motor and braking system? Now, some solutions have proved to be practical, and others less so. For example, it is not a good idea to be forced to let go of one of the primary sticks in order to extend the airbrakes or deploy the crow braking system when your glider is on the landing approach. It surely makes more sense to set up switchable functions for the Ch 1 stick (see example 4 on page 152), or to assign the braking system to the throttle stick, and shift the motor control to a slider - or even a switch. With this type of model the electric motor is often little more than a “self-launching system”, and is used either to haul the model into the sky at full power, or to pull it from one area of lift to the next at, say half-power, and for such models a threeposition switch is usually quite adequate. If the switch is positioned where you can easily reach it, then you can turn the motor on and off without having to let go of the sticks - even on the landing approach. Incidentally, similar thinking can be applied to flap control systems, regardless of whether they are “just” the ailerons, or full-span (combination) control surfaces which are raised and lowered in parallel. Once you are satisfied that all these preparations have been completed successfully, programming can commence. NN = Nomen Nominandum (name to be stated) Programming example - fixed-wing model 145 33112_mx12_HoTT_2_GB.indd Abs42:145 06.06.2011 19:39:46 First steps in programming a new model Example: non-powered fixed-wing model aircraft When programming a new model you should start by activating the … “select model” sub-menu (page 52) … in the “Model memory” menu. Use the arrow buttons cd of the left or right-hand four-way button to select a free model memory … 01 02 03 04 05 06 R06 ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ … then press the central SET button of the right-hand four-way button. You are now immediately requested to select the type of model you wish to program. Sel model type ( empty mod mem ) Since in this example we are setting up a fixed-wing model, we simply confirm the fixed-wing model symbol by pressing the central SET button of the right-hand four-way button; the screen now reverts to the basic display. Notes: • Naturally you can also use the pre-defined model memory 01 for programming your first model; this is the “fixed-wing model” type by default. • Once you have called up the “Model select” option it is not possible to interrupt the process, i. e. you must choose one or other model type. Even if you switch off the transmitter at this point, you cannot avoid this select procedure. However, if you make a mistake you can always correct it simply by erasing the model memory. • If the battery voltage is too low, you will not be able to change model memories for safety reasons. The screen then displays an appropriate message: not possible now voltage too low Once you have overcome this initial hurdle, you may need to bind the receiver installed in the model to this model memory in the … “Basic settings” menu (pages 56 … 62) This is accomplished by moving to the “rx bind” line: timer phase 2 phase 3 receiv out rx bind 0:00 ––– takeoff ––– speed ––– ––– to this line: In this line you trigger the bind process between model memory and receiver, as described in detail on pages 61. Without this step you cannot address the receiver. The next step is to press the c arrow button of the lefthand or right-hand four-way four-way button to move up into the first line, where you can start the actual model programming in the “mod name” line: mod name stick mode motor at C1 tail type aile/flap BIND N/A OK If you confirm your choice by pressing the SET button of the right-hand four-way button, you automatically taken no normal 1aile At this point you can enter the “Model name” by pressing the central SET button of the right-hand four-way button in order to move to the character table: 0123456789 : ; ABCDEFGHIJKLMNO PQRSTUVWXYZ model name Note: When you confirm the model selection the following message appears in the basic display for a few seconds: GRAUB You should also check the settings for “Stick mode” and “Motor at Ch 1” and change them if necessary: • “none”: The brake system is “retracted” at the forward position of the throttle / brake stick; in the “Wing mixers” menu the “Brake ¼ NN*” mixers are activated. In the “Aileron/flap” line of the “base sett.” menu it is possible to select “1AL”, “2AL” and “2AL 2FL”, and in 146 Programming example - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs42:146 06.06.2011 19:39:46 the “Wing mixers” menu the mixers “Brake ¼ NN*” and all mixers “from” and “to” flaps are activated. The warning message “Throttle too high” - see page 28 - and the “Motor stop” option in the “base sett.” menu is disabled. • “none/inv”: The brake system is “retracted” at the back position of the throttle / brake stick; in the “Wing mixers” menu the “Brake ¼ NN*” mixers are activated. In the “Aileron/flap” line of the “base sett.” menu it is possible to select “1AL”, “2AL” and “2AL 2FL”, and in the “Wing mixers” menu the mixers “Brake ¼ NN*” and all mixers “from” and “to” flaps are activated. The warning message “Throttle too high” - see page 28 - and the “Motor stop” option in the “base sett.” menu is disabled. • “Throttle min. forward or rear”: Ch 1 trim works forward or back. If the throttle stick is too far in the direction of “full-throttle” when you switch the transmitter on, you will be warned of this with the message “Throttle too high” and the “Motor stop” option in the “base sett.” menu is activated. In the “Aileron/flap” line of the “base sett.” menu it is only possible to select “1AL” or “2AL”, and in the “Wing mixers” menu the mixers “Brake ¼ NN*” and all mixers “from” and “to” flaps are disabled. Note: As mentioned previously, selecting “motor” or “no motor” affects not only the range of mixers available in the “Wing mixer” menu, but also the maximum number of wing servos which can be addressed. For this reason we shall initially consider “none” (no motor) in the following programming example. In the next two lines you select the basic arrangement of the servos in the model, and inform the transmitter of your choice: mod name stick mode motor at C1 tail type aile/flap tail type: aile/flap: no normal 2aile “normal”, “V-tail”, “delt/FlW” or “2elev sv” 1 or 2 aileron servos and 0 or 2 flap servos Note: If your model is fitted with only one camber-changing flap servo, you should still select “… 2FL”. Later, in the “Fixed-wing mixers” menu (see page 88), you should select the “AIL ¼ FL” mixer and set it to 0%. You can still exploit all the other mixers available at that point in the usual way. At this juncture - if not before - you should check that the servos are connected to the receiver in the standard Graupner sequence: Free or flap servo or left flap servo Receiver power supply Right aileron servo Rudder servo or V-tail Elevator servo or V-tail Aileron servo or left aileron servo Receiver power supply Airbrakes or throttle / speed controller (electric), alternatively right flap servo Notes: • If you set up a V-tail, but the “up / down” and / or “left / right” functions work the wrong way round, please refer to the table in the right-hand column on page 44 for the remedy. The same procedure can be used if you set up flaperons (superimposed ailerons and flaps), and they work the wrong way round. • If you select “2AL”, the second aileron servo should be connected to output 5; in this case a telemetry sensor cannot be connected. • If you select “2AL 2FL”, the second flap servo should be connected to output 1; in this case a throttle or airbrake servo cannot be connected. • The following settings apply to a model with a “normal” tail and no motor (“none”); if your model has a Vtail, the settings can be adopted virtually unchanged. However, if the model is a delta or flying wing, the situation is not quite so straightforward. A special programming example covering this model type will be found in the section starting on page 158. In the … NN = Nomen Nominandum (name to be stated) Programming example - fixed-wing model 147 33112_mx12_HoTT_2_GB.indd Abs42:147 06.06.2011 19:39:46 “Servo settings” menu S1 S2 S3 S4 S5 rev 0% 0% 0% 0% 0% cent (page 72) 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% trav + … ... you can set various parameters relating to the servos, i. e. “direction of rotation”, “neutral setting” and “servo travel”, to suit the requirements of the model. By “requirements” we mean adjustments to servo centre and servo travel which are needed to compensate for minor tolerances in servos and slight inaccuracies on the model itself. Note: The facilities provided in this menu for setting asymmetrical servo travels are NOT intended as a means of setting up differential travel on ailerons and / or camberchanging flaps. There are more suitable options for this in the form of specific functions in the “Fixed-wing mixers” menu; see the first two options in the picture on the right. Once you have completed the settings described thus far, a fixed-wing or powered model aircraft (the latter if you enter the idle direction of the throttle stick in the “Motor at Ch 1” line of the “Basic settings” menu) will, in principle, fly. However, there are no “refinements” in this set-up, and it is the refinements which will give you more long-term pleasure in your flying. Assuming that you are already capable of controlling your model safely, it’s time to get a taste of these extra facilities; to this end we now move on to the … “Fixed-wing mixers” menu diff aile. diff flaps ail rudd ail flaps brak elev brak flap brak aile elev flap elev aile elev flap aile flap diff–red (pages 88 … 93) 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% 0% ––– ––– ––– ––– ––– ––– ––– ––– ––– ––– ––– Note: This menu will show a varying range of options depending on the information you have entered in the “Basic settings” menu. In the illustration above, the full range is shown, as generated by the entries “2AIL 2FL” in the “Ail/Flap” line, and “none (/inv) in the “Motor at Ch 1” line. Of particular interest at the moment are “AIL-Diff.” (aileron differential) and the “AIL ¼ RUD” (aileron ¼ rudder) mixer, sometimes known as a combi-switch, and perhaps the mixers “Brake ¼ AIL” and “Brake ¼ FLAP”. As already described in detail on pages 89 and 90, the purpose of “AIL-Diff.” (aileron differential) is to eliminate adverse yaw. When a model aircraft turns, the down-going aileron produces more drag than the up-going one if both move through the same angle, and this causes the model to yaw in the opposite direction to the turn. This can be eliminated by setting differential aileron travel. A value between 20% and 40% is usually a good starting point, but the “perfect” setting nearly always has to be established by practical testing. The same applies to the “FL-Diff.” (flap differential) option if your model also features two camber-changing flap servos, assuming that the flaps are also to be used as ailerons, e. g. using the “AIL ¼ FL” mixer. The “AIL ¼ RUD” (aileron ¼ rudder) mixer serves a similar purpose, but also makes many models generally easier to handle when turning. A value of around 50% is usually a practical starting point. However, it is advisable to be able to switch this function off, particularly if you have ambitions as an aerobatic pilot; this is done by assigning a physical switch to the mixer (for example, the writer switches this mixer off “automatically” when he switches into the “Speed” flight phase, simply by assigning the same switch to both options). It is usually only necessary to set up a “Brake ¼ ELE” (brake ¼ elevator) mixer if your model suffers an excessive change of speed when you deploy the braking system. The danger is that you might need to retract the brakes again on the landing approach when you realise the model will “land short”; if its airspeed is too low when you retract the brakes, the model will just fall to the ground at that point. If you set up such a mixer it is important to test the setting at a safe height, and adjust the trim compensation if necessary. If you have selected “2AIL” or “2AIL 2FL” in the “Aileron / Flap” line of the “Basic settings” menu … 148 Programming example - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs42:148 06.06.2011 19:39:46 mod name stick mode motor at C1 tail type aile/flap no normal 2aile … and if you wish to be able to deflect both ailerons up using the throttle / brake stick (Ch 1), then a suitable value should be entered in the “Brake ¼ AIL” line. diff aile. ail rudd brak elev brak aile elev aile 0% 0% 0% 0% 0% ––– ––– ––– ––– ––– In principle the same applies to the “Brake ¼ FL” line, which also becomes available if you have selected “2AIL 2FL”, although the set value should cause the flaps to deflect as far as possible in the downward direction when the brake stick is operated. It is important to ensure that the servos do not strike their mechanical endstops. To achieve this, you may need to limit the servo travel(s) for the servos concerned using the “TRAVEL-” or “TRAVEL+” line on the “RX SERVO” display page of the “Telemetry” menu. If the ailerons are set up to act as simple brakes, as described previously, or as part of the braking arrangement in a butterfly (crow) system, then you should always enter a value for “Diff.-Red.” (“differential reduction” see page 93) - selecting 100% is the safe option here! Differential reduction means that aileron differential is suppressed proportionally only when you operate the airbrake stick. The purpose of this is to increase the down-going aileron travel on the landing approach, with the aim of improving aileron response. If the wing is equipped with two camber-changing flap servos in addition to two separately actuated ailerons, then the “AIL ¼ FL” (aileron ¼ flap) mixer transfers the aileron movements to the flaps; we suggest that the flaps should not follow the movement of the ailerons to a greater extent than about 50%. Note: If you have only installed one flap servo, you should leave this mixer at 0%. The “FL ¼ AIL” (flap ¼ aileron) mixer works in the opposite direction; depending on the layout of the model we suggest values between about 50% and 100% for this option. The flaps are controlled using the transmitter control or switch assigned to the input “E6”. Preferably, however, one of the rotary proportional controls (CTRL 7 or 8) should be used for this. Note: We strongly recommend that you reduce the travel of the flaps to about 25% in the “Transmitter control settings” menu, as this gives finer control of the flap positions using the selected transmitter control. The remaining options in the “Fixed-wing mixers” menu are designed to provide further fine-tuning of multi-flap wing systems, and are largely self-explanatory. When you have completed the model-specific settings up to this point, you are probably ready to consider the model’s first flight. At this juncture you should certainly take the time to carry out a series of “dry runs”, i. e. check all the settings thoroughly while the model is still on the ground. Remember that a serious programming error may damage more than just the model. If you are not sure of any point, please ask an experienced model pilot for advice. If during the test phase you realise that one or other of the settings needs to be changed in order to tailor the model’s control response to your preferences - perhaps the servo travels are too great or too small overall - then we suggest that you turn to the … “D/R / Expo” menu (page 82) aile 122% elev 111% rudd 100% +11% +22% 0% normal DUAL EXPO ––– … in order to adjust the overall set-up to suit your requirements and flying style. The Dual Rate function is used to adjust the relationship between stick travel and control surface travel (see page 82). However, if it is only the model’s control response around neutral which is too powerful for comfortable flying, i. e. the maximum travels are acceptable, then “Exponential” can be employed, either instead of Dual Rates or in addition to them. If a physical switch is assigned to this function, you can switch between two Dual Rate / Expo settings while the model is flying. Programming example - fixed-wing model 149 33112_mx12_HoTT_2_GB.indd Abs42:149 06.06.2011 19:39:46 Including an electric power system when programming a model and flap servos in your model. Connect your speed controller to the next vacant input, and assign one of the rotary proportional controls CTRL 7 or 8 - in our example CTRL 7 - to the selected input for example, “I6”. This is accomplished in the … An electric power system can be controlled in various ways: The simplest method of including such a power plant in a model program is to use the throttle / brake stick (Ch 1). However, in the preceding programming instructions we have already reserved the Ch 1 transmitter control for the airbrakes, which means that we have to explore other possibilities for controlling the motor: one is to use the switchable solution described in the section starting on page 152, and another is to use an alternative transmitter control. A suitable option is one of the two three-position switches SW 4/5 or 6/7, and another is one of the rotary proportional controls CTRL 7 or 8. However, another alternative would be the two-position switch SW 3. The deciding factor in your choice ought to be that the switch is within easy reach of your fingers. Example 1 Using one of the rotary proportional knobs CTRL 7 or 8 If one of these transmitter controls is used, the set-up is extremely easy. All you have to do is connect the speed controller to a vacant receiver servo socket 5 or 6. However, please bear in mind that outputs 2 + 5 and 6 + 1 may already be linked together, depending on the model type you have selected and the number of aileron “Transmitter control settings” menu (page 74) Use the arrow buttons cd of the left or right-hand four-way button to select the desired line. Pressing the central SET button of the right-hand four-way button activates “Switch / transmitter control assignment”. Now turn the knob of the rotary proportional control: after a brief delay the entry “ctrl 7” will appear in the highlighted field: I5 free +100% +100% I6 ctrl 7 +100% +100% tr v In the third column you can adjust servo travel to suit the speed controller you are using; alternatively you could use the “-Travel+” column in the … “Servo settings” menu S2 S3 S4 S5 S6 rev 0% 0% 0% 0% 0% cent (page 72). 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% trav + ously pressing the ef buttons of the left-hand fourway button: In the “OFF” position of the rotary control CTRL 7 the control channel you have selected - in this example channel “6” - should be at -100%, and at the “full-throttle” setting at +100%. Example 2 Using a two-position switch, SW 3 This variant implements a pure ON / OFF function, and results in the motor starting “abruptly” … unless the speed controller you are using features what is known as a “soft start” function. At the receiving end you need either a simple electronic switch or - if you want a smoother motor start - a suitable speed controller. The settings for this arrangement are entered in the … “Transmitter control settings” menu (page 74) First check which receiver socket (5 or 6) is available for connection to your speed controller. If you have assigned two aileron servos in the “Basic settings” menu, and if you have not connected any other auxiliary function, then this would be channel 6; this is the option we will use in our example. First set the selected switch to the “OFF” position, then use the arrow buttons cd of the left or right-hand fourway button to select the desired line in the menu. Press the central SET button of the right-hand four-way button to activate “Switch / transmitter control assignment”, then move the selected switch from the “OFF” position to the “ON” position. The highlighted field now shows the switch number together with a symbol which indicates the direction of switching: The last stage is to check the settings, so move from the basic display to “Servo display”, typically by simultane- 150 Programming example - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs42:150 06.06.2011 19:39:46 I5 free I6 +100% +100% +100% +100% tr v In the third column you can adjust servo travel to suit the speed controller you are using; alternatively you could use the “Servo travel” column in the … “Servo settings” menu S2 S3 S4 S5 S6 rev 0% 0% 0% 0% 0% cent (page 72). 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% trav + The last stage is to check the settings, so move from the basic display to “Servo display” by simultaneously pressing the ef buttons of the left-hand four-way button: in the switch’s “OFF” position, the control channel you have selected - in our example this is channel “6” - should be at -100%, and at the “full-throttle” setting at +100%. Example 3 use the “Servo travel” column in the … Using one of the three-position switches SW 4/5 or 6/7 This variant implements a three-stage solution for switching an electric motor on and off, and also results in an “abrupt “ motor start-up … unless the speed controller you are using features what is known as a “soft start” function. At the receiving end you need a suitable speed controller. First check which receiver socket (5 or 6) is available to connect your speed controller. If you have assigned two aileron servos in the “Basic settings” menu, and if you have not connected any other auxiliary function, then this would be channel 6; this is the option we will use in our example. Move to the … “Servo settings” menu “Transmitter control settings” menu (page 74) … and use the arrow buttons cd of the left or righthand four-way button to select the desired line. Press the central SET button of the right-hand four-way button to activate “Switch / transmitter control assignment”. Move the selected three-position switch; the highlighted field now shows the number of this transmitter control, for example “Transmitter control 9”. S2 S3 S4 S5 S6 rev 0% 0% 0% 0% 0% cent (page 72). 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% trav + The last stage is to check the settings, so move from the basic display to “Servo display” by simultaneously pressing the ef buttons of the left-hand four-way button: in the (upper) “OFF” position of the three-position switch the control channel you have selected - in our example this is channel “6” - should be at -100%. If you now move the switch toggle to the centre position, the bar should be in the middle, and at the (lower) “fullthrottle” setting it should be at +100%. I5 free +100% +100% I6 ctrl 9 +100% +100% tr v In the third column you can adjust servo travel to suit the speed controller you are using; alternatively you could Programming example - fixed-wing model 151 33112_mx12_HoTT_2_GB.indd Abs42:151 06.06.2011 19:39:46 Controlling the electric motor and up-aileron braking system using the Ch 1 stick Up-aileron deflection as landing aid Example 4 Butterfly / crow system as landing aid: ailerons up, flaps down Before we start the programming of this fourth example, and turn our attention to expanding the basic programming we have already discussed, we need to consider briefly the position of the throttle / brake stick at “motor OFF” or “brake OFF”. Usually the Ch 1 stick is moved forward to open the throttle, and back to extend the brakes. However, if you adopt this “classic” configuration, and switch, say, from “motor OFF” (stick “back”) to the braking system, “full brake” would immediately be applied, and vice versa: if you switch from “brakes retracted” to power, this would instantly switch to “full power”. It is certainly possible to make a “virtue” out of this “vice”: a “glider pilot” - usually flying with “brakes retracted = forward” will only switch to motor “ON” when necessary, and then reduce power to suit the situation (and - we hope - does not forget to move the Ch 1 stick back to the “forward” position when switching back). In contrast, a typical “power pilot” would probably operate with the reverse priority, i. e. he would only switch to “brake” when necessary, etc. In any case, it is possible to avoid these inter-connected effects by positioning the “zero point” of both systems so that they coincide. The above considerations mean that a “glider pilot” will probably prefer the “zero point forward” arrangement, while a “power pilot” might well decide on “zero point back”. The mx-12 HoTT transmitter can cope with whichever arrangement you prefer. However, the following section assumes that both “OFF” positions will be set to “forward”. If you prefer the alternative arrangement, there is no problem: the only difference compared with the ver- sion described here is that you would select “none/inv” in the “Motor at Ch 1” line of the “Basic settings” menu instead of “none”. All the other settings can be adopted as described. In the … “Transmitter control settings” menu (page 74) mod name GRAUBELE stick mode no motor at C1 tail type normal aile/flap 2aile … leave the “motor at Ch 1” line at “none” if you have set “Motor ON = forward”, or switch to “none/inv” if preferred. This is essential, otherwise the “Brake 1 ¼ NN *” mixers which we need will be suppressed in the “Fixed-wing mixers” menu. Important Note: As it is essential to set the motor to “none”, this also automatically disables the “Throttle too high” poweron warning! For this reason please take great care to set the Ch 1 stick to the correct position before you switch the receiving system on. The next step is to ensure that the speed controller connected to receiver output 1 is switched off “at the right end”. To accomplish this you may have to move to the … “Servo settings” menu S1 S2 S3 S4 S5 rev 0% 0% 0% 0% 0% cent (page 72) 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% trav + … and reverse the direction of servo 1. For safety’s sake you should check this setting now, before you continue with the programming procedure. Take the transmitter and model to a location where it is safe to run the motor. Switch the transmitter on, and move the Ch 1 stick to the motor “OFF” position, i. e. either fully forward or back. Hold your model firmly, or ask a friend to hold it for you. Check that the propeller is free to rotate without causing havoc, then connect the flight battery and switch your model’s receiving system on. If the motor does NOT run when the stick is in the “forward” or “back” position (as appropriate), then everything is in order. However, please check the system anyway by gradually advancing the stick until the motor begins to run. When you are satisfied, stop the motor, then switch off the receiving system in the model and finally switch off the transmitter. Note: If the motor does not start, or spins in the wrong direction, this indicates that there are other problems which you must correct before you continue with programming. For example, check the wiring of your motor, and refer to the operating instructions supplied with your speed controller. NN = Nomen Nominandum (name to be stated) 152 Programming example - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs42:152 06.06.2011 19:39:46 Once you are confident that the direction of the Ch 1 stick is “correct” as far as the motor is concerned, the next step is to ensure that you can switch its effect on the motor on and off, so that you can also control the braking system. This is carried out in the … “Free mixers” menu M1 M2 M3 typ MIX1 c1 ?? ?? fro to … where you need to program a free mixer “c1 ¼ c1”. When you have done this, use the arrow button f of the left or right-hand four-way button to move to the column above the symbol, and assign your selected “change-over switch” to this mixer; for example SW 3. This is done by activating the switch assignment by pressing the central SET button of the right-hand four-way button, and moving the switch from “forward” to “back”, i. e. towards you. With the mixer switched on, move to the column above symbol using the arrow button f of the left or the right-hand four-way button, and then on to the second screen page by pressing the central SET button of the right-hand four-way button once more. At this point you should set an initial SYMmetrical mixer value of -100%. c1 tr v –100% –100% offs 0% SYM ASY (pages 107 … 111) c1 ?? ?? c1 Now move to the “Offs” line: when you do this, the SYM and ASY fields are replaced by STO and SET. With the STO button highlighted, move the Ch 1 stick to the “OFF” position you have selected, and then press the central SET button of the right-hand four-way button: the value to the right of “Offs” now changes from 0% to approx. +100%, and the graphic display of the mixer curve displayed on the right also changes accordingly: MIX1 c1 c1 tr v –100% –100% offs +100% STO SET If you now press the ef buttons of the left-hand fourway button simultaneously to move to the … “Servo display” menu (page 113), … you can immediately check the effect of the settings you have entered so far: with the mixer switched off, the bar display for Channel 1 follows the movement of the Ch 1 stick. With the mixer switched on it stops - as shown - at around -100%. –100 % 0% 0% 0% 0% 0% Note: If you carry out this test with the receiving system and power system switched on, please take great care that you operate the change-over switch only in the “motor OFF” position! If you ignore this, there is a danger that the power system will be severely overloaded by being switched on abruptly, and it could even suffer damage. For the same reason you should be careful only to use the change-over switch at the “motor OFF” setting when you are flying the model. To conclude the programming procedure, return the selected “change-over switch” to the “motor ON” position, i. e. “forward”; move back to the multi-function menu and from there to the … “Fixed-wing mixers” menu (pages 88 … 93) where - assuming that you have not already done this in your general model programming - you can select the “Brake ¼ AIL” line and set the desired aileron travel when the Ch 1 stick is operated in the up direction (“Brake”). In the column above the symbol press the central SET button of the right-hand four-way button before assigning your selected “change-over switch” by moving your preferred switch from “forward” to “back”. Programming example - fixed-wing model 153 33112_mx12_HoTT_2_GB.indd Abs42:153 06.06.2011 19:39:46 diff aile. ail rudd brak elev brak aile elev aile +33% +55% –5% +44% 0% ––– ––– ––– ––– Note: The settings shown here are just examples, and must not be adopted under any circumstances without careful checking. If you now return to the “Servo display” menu and move the Ch 1 stick alone, you will see that the bar display for Channel 1 either remains at around -100% while the displays for channels 2 + 5 follow the stick movement, or the other way round: when the switch is operated, the latter stay at around the mid-point, and only the Channel 1 display moves. –100 % + 88% 0% 0% – 88% 0% 154 Programming example - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs42:154 06.06.2011 19:39:47 Operating the timers using the Ch 1 stick or a switch SW 1, 3 … 7 If, following on from the model programming described on the preceding pages, you have decided on Example 4 from the previous page, or you are using the Ch 1 stick (throttle / brake stick) to control motor power - independently of this programming example - then you can use the associated control switch to turn the stopwatch on and off automatically. To assign this control switch, move the Ch 1 stick to the Idle position, then move to the “Timers” line in the … “Basic settings” menu (pages 56 … 62) Press the central SET button of the right-hand four-way button to activate the switch assignment, then select the input field above the switch symbol and move the throttle / brake stick from its idle position in the direction of “full throttle”. Depending on the direction of movement, the switch “C1l” or “C2l” will appear on the screen at a particular position of the Ch 1 stick: stick mode motor at C1 tail type aile/flap timer no normal 2aile 0:00 C2 If you now move the stick back towards idle, you will see that the switch symbol changes again at around 80% of stick travel: between the “idle position” and the switching point the switch symbol is “open”, beyond this it is “closed” (see “Control switches” on page 39). If you now repeatedly press the central ESC button of the left-hand four-way button to return to the transmitter’s basic display, in order to check the system, you will see that the stopwatch and flight timer start running when you move the stick past the switching point in the direction of full-throttle, and that the stopwatch alone halts again when you move the stick back to the idle position. When the stopwatch is halted, you can stop the flight timer by pressing the central ESC button of the left-hand four-way button, and then reset both timers to their starting value by simultaneously pressing the two arrow buttons cd of the right-hand four-way button (CLEAR) … or re-start them by moving the stick beyond the switching point again. GRAUBELE #01 5.2V 50% 3:33h 2:22 stop flt 11:11 «normal » K78 HoTT 5.5V With the stopwatch halted, press the central ESC button of the left-hand four-way button (CLEAR) button in the basic display, so that the stopwatch switches to the “Timer” function. The timer can now be started and stopped using the throttle control. Alternatively, if you control your motor using one of the switches SW 1, 3 … 7, as described in Examples 2 or 3, you do not need any of the previously described control switches. All you need to do is locate the switch which you use to turn your motor on and off, and assign the same switch to the “Timers”, with the same switching direction, so that they start running at the same moment you turn the motor on. In contrast, if you have decided on the solution described in Example 1, then unfortunately there is no alternative but to operate the motor and timers separately. Tip: When using an electric motor the motor run is usually limited by the capacity of the battery, and in this case you would normally set the stopwatch to “count down”. Simply enter the maximum permitted motor run, e. g. “5 min.”. As described on pages 59 and 67 … 68, the transmitter’s sounder starts to emit warning tones “30 sec” before “zero”. stick mode motor at C1 tail type aile/flap timer no normal 2aile 5:00 C2 Programming example - fixed-wing model 155 33112_mx12_HoTT_2_GB.indd Abs42:155 06.06.2011 19:39:47 Using flight phases Within any of the ten model memories you can program up to three different flight phases (states of flight), each incorporating settings which can be entirely different from the others. Each flight phase can be called up by means of a switch. Flight phases represent the simplest and most convenient method of switching between different model settings in flight, and are programmed for different stages of a typical flight, such as “normal”, “thermal”, “speed”, “distance” etc. We assume that you have already programmed the model in the transmitter’s model memory, set it up carefully, test-flown it and trimmed it out properly. First move to the … “Basic settings” menu tail type aile/flap timer phase 2 phase 3 (pages 56 … 62) normal 2ail2fl 5:00 takeoff ––– speed ––– … and then to the line “Phase 2” and / or “Phase 3”, where you can either accept the default name or assign a specific, more appropriate, name to each flight phase. The purpose of this name is just to help you differentiate between the flight phases; it has no significance in terms of programming. It will later appear in the transmitter’s basic screen display, and also in the “Phase trim” and “D/R Expo” menu. A physical switch must be assigned so that you can select the different flight phases. The ideal one for switching a maximum of three flight phases is one of the three-position switches SW 4/5 or 6/7, located at front left and right on the transmitter. Each of the two end-points of this switch should be assigned to one flight phase, starting from the centre position. We recommend that the switch direction should match the phase numbering: as shown in the left-hand illustration, for example, “Phase 2” is “forward” from the centre position, while “Phase 3” is “back” (towards you). Select the appropriate line, name, and switch assignment in the “usual” way, i. e. using the various four-way buttons. tail type aile/flap timer phase 2 phase 3 normal 2ail2fl 5:00 takeoff speed Note: In principle it makes no difference which names you assign to the various phases - with the exception of Phase 1, which is assigned the name “normal”, and is always active when flight phases 2 and 3 are disabled. For general model flying three flight phases are usually quite sufficient: • “Launch” or “Thermal” for launch and “staying up”, • “Normal” for normal conditions, and • “Speed” for flying in “top gear”. the same. To change these settings, call up the … “Phase trim” menu (page 86) … move the phase switch (or switches) to the appropriate position, and enter the desired values in the standard way by pressing the input buttons, in a similar way to the method of adjusting transmitter control centres and offsets with other radio control systems. P H A S E T R I M normal 0% 0% 0% takeoff +8% 4% +2% ¿ speed –7% –5% –3% FLA AIL ELE If you now switch the receiving system on and select the different phases in turn, you will see a difference in control surface response. The differences are also reflected in the bar display for the servos in the “Servo display” menu, which you can call up from virtually any menu position by simultaneously pressing the ef buttons of the left-hand four-way button. Note: Depending on the information you have entered in the “aile/flap” line of the “Basic settings” menu, the “ELE” column alone, the “AIL” and “ELE” columns, or - as shown above - “FLAP”, “AIL” and “ELE” may appear on the screen for “Phase trimming”. At this point all three phases have been set up and assigned names, and you can switch between them; however … if you operate the phase switch you will soon notice that nothing has changed, i. e. all the settings for the control surfaces, and especially the wing flaps, are 156 Programming example - fixed-wing model 33112_mx12_HoTT_2_GB.indd Abs42:156 06.06.2011 19:39:47 Programming example: servos running in parallel In some cases a second servo is required to run in parallel with an existing servo; for example, if a second elevator or rudder is to be actuated by a separate servo, or where a second servo is needed to cope with very high control forces, or where two servos are required for a large control surface due to the high forces involved. This task could be solved simply by connecting both servos together in the model using a conventional Y-lead. However, this has the drawback that the linked servos cannot be adjusted individually from the transmitter, i. e. you forfeit the basic advantage of the computer radio control system: separate adjustment of individual servos from the transmitter. Another option would be to call up the Telemetry menu and use its “Channel mapping” option instead of a simple Y-lead; see page 121. However, the simplest method is to use the transmitter’s software facilities. For example, it is easy to set up … Two elevator servos … to operate in parallel. First move to the … “Basic settings” menu (page 56 … 62) GRAUBELE mod name stick mode idle re. motor at C1 cut off –100% +150% ––– tail type 2elev sv … and set “2elev sv” in the “tail type” line. The two elevator servos are then connected to receiver output sockets 3 and 6. Two rudder servos In this example we will connect two rudders “in parallel” using the “Free mixers” menu. The second rudder could be connected to receiver output 6, which is not already in use. The first step is to move to the … “Free mixers” menu M1 M2 M3 second rudder control channel” - in our case “6” - with suitable servo travel settings. An offset of +100% is then selected for both mixers, as the Ch 1 stick is (usually) at its top end-point when the airbrakes are retracted, and the winglet rudders are only required to deflect outwards proportionally when the brakes are extended. (pages 107 … 111) tr rd ?? ?? ?? ?? typ fro to … and set up a mixer “Tr RUD ¼ 6”. In the “Type” column select the “Tr” setting, so that the rudder trim affects both rudder servos. Finally switch to the graphics page and set a SYMmetrical mixer input of +100%: MIX1 tr rd tr v +100% +100% Offs 0% SYM ASY Once again, for safety reasons it is really essential that you set input 6 to “free” in the “Transmitter control settings” menu. As an added refinement, you may want both rudders to deflect outwards only, as part of a braking system controlled by the Ch 1 stick. This can be accomplished by setting up two additional mixers “c1 ¼ 4” and “c1 ¼ Programming example - fixed-wing model 157 33112_mx12_HoTT_2_GB.indd Abs42:157 06.06.2011 19:39:47 Programming example: Delta / flying wing On page 144, where the section on fixed-wing model programming starts, you will find general notes regarding the installation and set-up of the RC system in a model, and - of course - this applies equally to deltas and flying wings. The information on test-flying and refining the settings is also relevant, including the section on programming flight phases. left Free or auxiliary function Receiver power supply Free or telemetry sensor or auxiliary function Free or rudder Right elevon (aileron / elevator) servo Left elevon (aileron / elevator) servo Receiver power supply Airbrakes or throttle or speed controller (electric motor) … and with four wing-mounted control surfaces as follows: Left flap (aileron) / elevator right In their characteristic shape and geometry, deltas and flying wings differ very significantly from “normal” models even at first sight, but the differences in the requisite servo arrangement are rather more subtle. The “classic” model delta or flying wing generally has only two control surfaces, which act both as ailerons (in opposite directions) and as elevators (in the same direction), in a similar way to the superimposed rudder / elevator functions of a V-tail. More modern designs tend to be more complex; one (or two) inboard control surfaces may be used purely as elevators, while the outboard ailerons also act as elevators, but to a reduced extent. If a flying wing has four or even six wing control surfaces, it is certainly feasible nowadays to set them up with camberchanging flap functions and / or even a butterfly (crow) system. However, most of these models still rank as “classic” deltas and flying wings, with two wing-mounted control surfaces, and for them the servos should be connected to the receiver as follows (see also page 43): 158 Programming example: delta and flying wing 33112_mx12_HoTT_2_GB.indd Abs47:158 Receiver power supply Right flap (aileron) / elevator Free or rudder Right elevon (aileron / elevator) servo Left elevon (aileron / elevator) servo Receiver power supply Airbrakes or throttle or speed controller (electric motor) If your flying wing features inboard elevators, the “normal” servo sequence has proved useful; this arrangement can also be employed for “canards”: Left flap (/ elevator) Receiver power supply Right elevon (aileron / elevator) Rudder (if present) Elevator (if present) Left elevon (aileron / elevator) servo Receiver power supply Airbrakes or throttle or speed controller (electric motor) or alternatively right flap (/ elevator) Depending on the receiver servo sequence you select, you should first move to the … “Basic settings” menu (pages 56 … 62) … and select the following options in each line: “motor at C1”: • “none”: The brake system is “retracted” at the “forward” position of the throttle / brake stick. In the “Aileron / flap” line of the “base sett.” menu it is possible to select “1AL”, “2AL” and “2AL 2FL”, and the mixers “Brake ¼ NN*” in the “Wing mixers” menu and all mixers “from” and “to” flaps are activated. The warning message “Throttle too high” (see page 28) and the “Motor stop” option in the “base sett.” menu are disabled. • “none/inv”: The brake system is “retracted” at the “back” position of the throttle / brake stick. In the “Aileron / flap” line of the “base sett.” menu it is possible to select “1AL”, “2AL” and “2AL 2FL”, and the mixers “Brake ¼ NN*” in the “Wing mixers” menu and all mixers “from” and “to” flaps are activated. The warning message “Throttle too high” (see page 28) and the “Motor stop” option in the “base sett.” NN = Nomen Nominandum (name to be stated) 06.06.2011 19:39:47 menu are disabled. • “Idle forward” or “Idle rear” The Ch 1 trim operates either forward or back. If you switch the transmitter on with the throttle stick too far in the direction of full-throttle, you will see the warning message “Throttle too high” on the screen. In the “Aileron / flap” line of the “base sett.” menu it is only possible to select “1AL” or “2AL”, and the mixers “Brake ¼ NN*” in the “Wing mixers” menu and all mixers “from” and “to” flaps are disabled. In the “base sett.” menu the “Motor stop” option is activated. “tail type”: “Delta / flying wing” or “Normal” “aile/flap”: Two ailerons “2aile” and - if present and selectable - two flaps “2fl”. The primary function of these settings is to define the range of wing mixers which the software makes available. If you select the “Delta / flying wing” tail type, the software automatically superimposes the elevator and aileron functions. In this case the mixer ratios can be adjusted by varying the Dual Rate settings in the “D/R / Expo” menu (see page 82). If you select “Delta / flying wing”, all settings of the “NN * ¼ elev” wing mixers in the … NN = Nomen Nominandum (name to be stated) “Fixed-wing mixers” menu diff aile. ail rudd brak elev diff–red (pages 88 … 93) 0% ––– 0% ––– 0% ––– 0% … affect the elevator (up / down) function of the two elevon (combined aileron / elevator) servos, as well as the flap / elevator servos. Notes: • The flap mixers and flap differential only appear in the list if you have also entered “2fl” in the “aile/flap” line at the “Delta / Flying wing” model type; see illustration on the right. • In principle the same applies to the “Brake ¼ NN *” mixers. These are also suppressed if you have decided on “Throttle min forward / back” in the “motor at C1” line of the “Basic settings” menu. • Even if you have selected “2aile2fl”, the (digital) elevator and aileron trims only affect aileron / elevator. If you wish to circumvent this, it is simpler to program your model as described in the following section. Programming a model delta using the “normal” tail setting Alternatively, if you select the “normal” tail type in the “Basic settings” menu, and connect the servos to the receiver as shown in the lower of the two receiver socket sequence diagrams on the left-hand page, then the aileron function of the two elevon servos will work correctly, but not the elevator function. In the “normal” tail type you have to force the two aileron servos and the two flap servos to move in the same direction and provide an elevator effect when an elevator command is given. This requires the “elev ¼ NN *” wing mixers, whose effect can be adjusted separately. The procedure starts by selecting the … “Fixed-wing mixers” menu (pages 88 … 93) (The following settings are model-specific, and you must check carefully that they work correctly on your model before accepting them.) diff aile. diff flaps ail rudd ail flaps brak elev brak flap brak aile elev flap elev aile elev flap aile flap diff–red 0% 0% 0% +55% 0% +55% +66% +77% +77% 0% 0% 0% ––– ––– ––– ––– ––– ––– ––– ––– ––– ––– ––– … where you set values other than zero for these mixers. With this set-up the tailless model is considered to be a Programming example: delta and flying wing 159 33112_mx12_HoTT_2_GB.indd Abs47:159 06.06.2011 19:39:47 “normal” four-flap wing (two ailerons and two flaps), and therefore has all the options associated with this wing type. The method involves the “elev ¼ NN *” mixers, which were originally intended only for pitch trim compensation and non-standard applications. In this case they are “abused” by setting higher values than normal, in order to transfer the elevator signal to the control surfaces of the tailless model. However, none of the fixed-wing mixers includes the digital trim of the elevator stick - so an alternative has to be found. Start by switching to the … “Transmitter control settings” menu I5 ctrl 6 I6 ctrl 6 +15% +15% tr v (page 74) +15% +15% … and assign the same transmitter control to the inputs 5 and (if required) 6, e. g. the rotary proportional control CTRL 7. Now move to the “Travel” column and reduce the travel of the transmitter control for these two inputs symmetrically to around 50%, or even less, because: the lower this value, the finer the trim control. However, if you prefer to use the normal elevator trim lever, set - or leave - the “elev ¼ NN *” mixers to 0%, and instead set up free linear mixers to do the job. This is done by calling up the … “Free mixers” menu M1 M2 M3 (pages 107 … 111) tr tr el el ?? ?? typ fro to … and setting up one linear mixer “Tr elev ¼ 5”, and - if necessary - “Tr elev ¼ 6”. Move to the graphic page of this menu to set the required mixer ratios. Check the settings, and above all the direction of effect, in the “Servo display”, or on the model itself, and change the prefixes if necessary. If you carry out the programming as described above, the ailerons will also move in the same direction, like flaps, when you move the elevator stick. The effect of the “tr” option is that the elevator trim lever also affects the associated mixer when you operate the elevator stick. Since an additional transmitter control is no longer required for this arrangement, you should disable input 5 and (if used) input 6 in the second column of the “Transmitter control settings” menu; simply set these inputs to “free”. Many years ago, the author flew a model delta programmed exactly in this way using the mc-20, with the following additional refinements: “flap settings” used as trim, and butterfly (crow) as landing aid - the latter exploiting the “Brake ¼ AIL” and “Brake ¼ FL” wing mixers to provide complete compensation for pitch trim changes in both directions. In this case the term “ailerons” means the outboard wing control surfaces, and “flaps” the inboard pair of control surfaces. A modern sweptback flying wing can be controlled in a similar fashion. These models also feature inboard and outboard control surfaces: the former forward of the Centre of Gravity, the latter aft of it. Deflecting the inboard control surface(s) down increases lift and produces an up-elevator effect; deflecting them up creates the opposite effect. In contrast, the outboard ailerons act in the reverse direction: a down-deflection produces a down-elevator effect, and vice versa. There are really no limits to what can be achieved with appropriate settings of the system’s sophisticated mixers. However, please note that you should be extremely careful when setting differential travel with such a configuration, regardless of your model’s set-up, its tail type and the number of servos you are using. This is because differential travels on a tailless model tend to produce an asymmetrical elevator effect, rather than the desired adverse yaw reduction. For this reason it is advisable to start with a differential setting of 0% - at least for the first few flights. When you are familiar with the model and feel the need to experiment, it may then be feasible under certain circumstances to try differential settings deviating from zero. For larger models it could be advisable to install winglets fitted with rudders, i. e. small vertical surfaces at the wingtips. If these are actuated by two separate servos, they can be controlled as described in the example on page 157 dealing with “Servos running in parallel”, or using “Channel mapping” in the “Telemetry” menu; see page 121. You may also want both rudders to deflect outwards when a braking system is operated using the Ch 1 stick, and this can be accomplished as follows: if you have selected the “normal” tail type, set up two further mixers “c1 ¼ 4” and “c1 ¼ second rudder control channel” 160 Programming example: delta and flying wing 33112_mx12_HoTT_2_GB.indd Abs47:160 06.06.2011 19:39:47 with suitable travel settings. The offset for both mixers should be +100%, as the Ch 1 stick is usually at the forward end-point when the airbrakes are retracted, and the winglet rudders are only required to deflect outwards proportionally when the brakes are extended. For your notes 161 33112_mx12_HoTT_2_GB.indd Abs11:161 06.06.2011 19:39:47 Programming example: F3A model aircraft F3A models belong to the category of powered fixedwing model aircraft designed for competition flying. They may be powered by an internal combustion engine or an electric motor. Electric-powered models are eligible and totally competitive in the international F3A “pattern” class, and also in the F5A electric aerobatic class. fixed-wing models we have already described. The auxiliary function “Retracts” is usually assigned to the auxiliary channel 6. Ideally the retracts are operated using the switch without a centre detent (SW 3). An optional “extra” - used only if necessary - is mixture adjustment control for the carburettor. This is generally operated by one of the rotary proportional controls CTRL 7 or 8, connected to one of the auxiliary channels not already in use. Free, or retracts, or mixture adjustment In this programming example we assume that you have already read through the description of the individual menus, and are therefore familiar with the general method of handling the transmitter. On page 144, where the section on fixed-wing model programming starts, you will find general notes on installing and setting up the RC system in a model, and - of course - this applies equally to F3A models, and therefore does not need to be repeated at this point. If an F3A model is accurately built, it usually exhibits flying characteristics which are almost completely neutral. The perfect aerobatic model has a very smooth but precise control response, and any movement around any one of its flight axes should not affect the other axes. F3A models are flown using aileron, elevator and rudder controls. The use of separate servos for each aileron is almost universal. The flying controls are supplemented by control of motor power (throttle function) and in many cases a retractable undercarriage. As a result the servo assignment for channels 1 to 5 is no different from the Receiver power supply Telemetry sensor or right aileron Rudder Elevator Aileron or left aileron Receiver power supply Throttle or speed controller (electric motor) When assigning functions to the auxiliary channels at the transmitter, it is advisable to ensure that the controls required are within easy reach, since the advanced aerobatic pilot has very little time to think about letting go of the sticks - especially when flying under competition conditions. Programming The basic programming of the transmitter has already been described in detail in the section starting on page 144, so this section concentrates on tips specific to F3A models. In the … “Servo settings” menu S1 S2 S3 S4 S5 rev 0% 0% 0% 0% 0% cent (page 72) 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% trav + … you can adjust the servo settings to suit your model. It has proved advisable to use at least 100% servo travel, as precision of control can be perceptibly better if relatively large servo travels are employed. This should be borne in mind when building the model and designing the control surface linkages. Any minor corrections required can be made in the third column during the initial test flights. The next step is to select the … “Basic model settings” menu (page 56 … 62) … and activate the idle trim for Channel 1 (normally “Idle back”; i. e. full-throttle forward). The digital trim now works at the idle end of stick travel. The “cut-off trim” enables you to switch immediately from the “motor stopped” position to the idle position you have previously established just by applying a single “click” on the trim lever (see page 40). 162 Programming example: F3A model 33112_mx12_HoTT_2_GB.indd Abs46:162 06.06.2011 19:39:47 stick mode motor at C1 idle re. cut off –100% +150% 1 tail type normal aile/flap 2aile The remaining settings should be adjusted as required to suit your personal preferences. You may find it necessary to assign transmitter controls to particular inputs to operate the retractable undercarriage or carburettor mixture adjustment. This is carried out in the … “Transmitter control settings” menu (page 74). For example, you may like to assign a particular transmitter control - perhaps one of the two rotary proportional knobs - e. g. CTRL 7 - for mixture adjustment, or the ON / OFF switch SW 3 for the retracts, to the input “E6”: I5 free I6 +100% +100% +100% +100% tr v The retracts are extended and retracted when you operate the switch “SW 3”. You may need to adjust the travel of the transmitter control, and perhaps reverse that channel by setting a negative prefix for servo travel. F3A models fly fairly fast, and respond very “solidly” to corrective movements of the servos. However, in competition flying it is vital that all abrupt control movements and corrections should be kept to a minimum, as the judges will invariably notice any lack of smoothness and dock a few points, so it is advisable to set exponential control characteristics on the stick functions. Move to the … “D/R Expo” menu (page 82). Exponential values of around +30% on aileron, elevator and rudder have proved to be a good starting point, and you can set them in the right-hand column of this menu. These values provide smooth, well-defined control of the typical F3A model. Many experts use higher values; even up to +60% exponential. aile 100% elev 100% rudd 100% +33% +33% +33% DUAL EXPO ––– ––– ––– Since F3A models generally have two aileron servos, it has proved useful to deflect both ailerons “up” slightly for the landing. In most cases this causes the model to fly a little more slowly and with a more stable attitude on the landing approach. To achieve this you will need to program mixers in the … “Free mixers” menu (section starting on page 106). Both ailerons are usually required to deflect “up” as a landing aid, in parallel with the movement of the throttle stick, but only from the half-throttle setting in the direction of idle. From that point on, the further the stick is moved towards the idle position, the more the ailerons deflect up. The reverse occurs when you open the throttle: the ailerons are returned to neutral to avoid the model suddenly ballooning up. A little down-elevator must usually be mixed in to ensure that the aeroplane does not climb when the ailerons / flaps are deployed. To meet these requirements you need the two mixers shown in the illustration below. M1 M2 M3 typ c1 c1 ?? el ?? fro to The mixers are activated using one and the same external switch, e. g. “SW 6”, which therefore has to be assigned to both mixers, with the same direction of effect. Press the central SET button of the right-hand four-way button to move to the mixer inputs on the second screen page, and set the appropriate mixer ratios. In both cases the mixer neutral point should be left at the centre position of the Ch 1 stick travel. For this reason you should now move the Ch 1 stick to the Idle range, select the ASY field, and enter the following values: MIX 1: -60% … -80% and MIX 2: -5% … -10%. Example of MIX 1: MIX1 c1 tr v –66% 0% offs 0% SYM ASY Programming example: F3A model 163 33112_mx12_HoTT_2_GB.indd Abs46:163 06.06.2011 19:39:47 This completes the basic set-up for a typical F3A model. Correcting model-specific errors It is an unfortunate fact of life that even very carefully built models exhibit minute faults and inaccuracies which produce unwanted deviations when the model is flying; the mixers of a computer radio control system are then needed to compensate for these deficiencies. In this section we will describe how to carry out the adjustments required, but please note the following points before we get started: it is vital to ensure that the model is built as accurately as humanly possible, is balanced perfectly around the lateral and longitudinal axes, and that motor downthrust and sidethrust are set correctly. 1. Rudder causes unwanted movement around the longitudinal and lateral axes It is often the case that a rudder command causes the model to rotate slightly around the longitudinal and / or lateral axis. This is particularly troublesome in what is known as knife-edge flight, where the model’s total lift is generated by the fuselage, aided by the rudder deflection. The result is that the model rotates and changes heading slightly, as if the pilot were applying aileron or elevator at the same time. These tendencies have to be corrected with compensation around the lateral axis (elevator) and around the longitudinal axis (aileron). These corrections can be achieved easily with the mx-12 HoTT, exploiting the “free mixers” once again. For example, if the model rotates to the right around the longitudinal (roll) axis when the rudder is deflected to the right for a knife-edge pass, then a mixer is set up which deflects the ailerons slightly to the left. Heading changes around the lateral (elevator) axis can be corrected in a similar way using a 164 Programming example: F3A model 33112_mx12_HoTT_2_GB.indd Abs46:164 mixer acting upon the elevator: a) Correction around the lateral axis (elevator) MIX “rd ¼ el” ASYmmetrical setting. The exact values required must be found by flight testing. b) Correction around the longitudinal axis (aileron) MIX “rd ¼ al” ASYmmetrical setting. The exact values required must be found by flight testing. In most cases relatively small mixer values are called for - typically below 10% - but this does vary from model to model. 2. Vertical climb and descent Many models exhibit a tendency to deviate from the ideal line in vertical climbs and descents. To correct this we need an elevator neutral position which varies according to the throttle setting. For example, if the model tends to pull out of a vertical descent by itself when the motor is throttled back, slight down-elevator must be mixed in at this throttle setting. MIX “c1 ¼ el” As a rule you will need to set mixer values below 5%, but once again there is no substitute for test-flying. 3. Rolling (movement around the longitudinal axis) at idle When you reduce the throttle setting, the model may tend to roll slightly in one direction. Clearly an aileron correction must be made. However, it is much more elegant to let a mixer correct this effect for you than to move the stick manually. Once again, a mixer needs to be set up: MIX “c1 ¼ al” As a rule you will need to set mixer values below 5%, but once again test-flying is called for. The adjustment process should only be carried out in calm weather. Often all you need to do is apply the mixer in the control segment between half-throttle and idle. To achieve this, leave the Offset point at the centre position, and set up the mixer ASYmetrically. 4. Rolling when ailerons and flaps are extended If you fly the landing approach with both ailerons deflected up, the model may show a tendency to roll slightly due to minor variations in aileron servo travel (or constructional inaccuracies); i. e. the model may turn to either side by itself. Once again, this tendency can easily be corrected using a mixer to vary the compensation according to the position of the ailerons / landing flaps. MIX ”c1 ¼ al” It is essential to provide a means of switching the mixer on and off using the switch which controls the aileron / landing flap function (see previous page), to ensure that this mixer only has any effect when the aileron / landing flap function is activated. The optimum value has to be found by test-flying. And finally a few words on the … 06.06.2011 19:39:47 “FAIL-SAFE settings” We strongly recommend that you make use of the safety potential of this option by at least setting the throttle position (glow-powered models) to idle, or the electric motor to stop, if a fail-safe event should be triggered. This simple precaution ensures that the model is much less likely to create havoc and cause property damage or personal injury. If you also program the fail-safe positions of the control surfaces in such a way that the model flies steadily descending circles in case of interference, then you have a good chance that it will land relatively gently even if the radio link fails for a protracted period. This also gives you plenty of time to restore the connection, should the whole 2.4 GHz frequency band suffer interference for a while. In the receiver’s default state, however, the servos remain in their last valid position (“hold mode”) when interference occurs. You can program any individual servo output of your receiver to a “fail-safe position” (fail-safe mode), as described on page 116. Summary The settings described on this page are intended primarily for the expert flyer. Please bear in mind that refining the flying characteristics of a model aeroplane to this extent involves tremendous effort, time, sensitivity and expertise. Some experts continue the programming procedure even when they are flying, although it is not advisable to try this if you are just a moderately advanced pilot making your first attempt with an F3A aerobatic model. You would be well advised to request help from an experienced pilot, and carry out the finetuning adjustments mentioned here one by one, with the expert at your side, until your model exhibits the neutral flying characteristics you desire. Programming example: F3A model 165 33112_mx12_HoTT_2_GB.indd Abs46:165 06.06.2011 19:39:47 Programming example: model helicopter In this programming example we assume that you have already read and understood the descriptions of the individual menus, and are by now familiar with the general handling of the transmitter. We also assume that you have assembled and adjusted the helicopter exactly according to the kit instructions. The electronic facilities provided by the transmitter should never be used to compensate for major mechanical inaccuracies. As so often in life, there are various ways and means of reaching a particular destination when programming the mx-12 HoTT. In this example our intention is to provide a sensibly structured course of action, so that you have a clear idea of logical programming techniques. Where there are several possible methods, we first describe the simplest and most easily understood solution. It is likely that the helicopter will work perfectly when set up in this way, but naturally you are still free to try out other solutions at a later stage, in case they suit you better. We have deliberately chosen this simple programming project in order to demonstrate that it is possible to set up a helicopter which flies extremely well with relatively little programming effort. Nevertheless, we do not want to forfeit all the possible refinement facilities: after the basic description you will also find set-up notes on gyro gain, speed governors and flight phase programming. Note: If, in contrast to the glow-powered machine described here, your main interest lies in electric-powered model helicopters, then please read on! Apart from the idle adjustments, which naturally do not apply, you can adopt most of the settings described in the following section virtually unchanged. To initiate this typical programming exercise move to the “Model memory” menu, then to the … “select model” sub-menu (page 52), … where you select a free model memory using the arrow buttons of the left or right-hand four-way button: As our programming example we take the Graupner STARLET 50 helicopter, with right-hand rotation, three swashplate linkage points distributed evenly at 120° (“3Sv (2 roll)” type), a beginner’s set-up without enhanced throttle curve, without heading-lock gyro system, no method of influencing the gyro’s “normal operating mode” from the transmitter, and with no speed governor (regulator). 01 02 03 04 05 06 R06 ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ ¿¿free¿¿ After pressing the central SET button of the right-hand four-way button, you can use the f button of the left or right-hand four-way button to select … Sel model type ( empty mod mem ) … the “Helicopter” model type. Confirm your choice by pressing the central SET button of the right-hand fourway button, and the screen immediately switches to the basic display. Notes: • Once you have called up the “Model select” option it is not possible to interrupt the process, i. e. you must choose one or other model type. Even if you switch the transmitter off, then on again, you still have to make this choice. However, if you make a mistake you can always correct it simply by erasing the model memory. • If the warning message “Throttle too high” appears, you can erase it by turning the rotary proportional knob CTRL 7 anti-clockwise to its end-point. • If the battery voltage is too low, you will not be able to change model memories for safety reasons. In this case the screen displays an appropriate message: not possible now voltage too low Once you have overcome this initial hurdle, it is essential to bind the receiver installed in the model to this model memory in the … 166 Programming example: model helicopter 33112_mx12_HoTT_2_GB.indd Abs48:166 06.06.2011 19:39:47 “Basic settings” menu (pages 64 … 71) This is accomplished by moving to the “rx bind” line: timer phase 2 autorotat. receiv out rx bind 0:00 hover ––– ––– ––– ––– Note: When you confirm the model selection the following message appears in the basic display for a few seconds: BIND N/A OK If you confirm your choice by briefly pressing the SET button of the right-hand four-way button, you automatically move to this line: In this line you trigger the bind process between model memory and receiver, as described in detail on page 70. Without this step you cannot address the receiver. The next step is to press the c arrow button of the lefthand or right-hand four-way button to move up into the first line, where you can start the actual model programming in the “mod name” line. Now enter a suitable name for the model memory, … mod name stick mode 1 ser vo swashplate cut off –100% +150% ––– right rotor direct … by selecting the characters available on the second page of the “mod name” line: 0123456789 : ; ABCDEFGHIJKLMNO PQRSTUVWXYZ model name STAR Once you have entered the “Model name” you should check that the “Stick mode” is correct: STARLET mod name stick mode 1 ser vo swashplate cut off –100% +150% ––– right rotor direct In the next four lines we come to the first settings which are specific to helicopters: In the “Swashplate type” line select the number of servos which are used to actuate the swashplate. See page 65 for more details of this. In the “Rotor direction” line we enter the direction of rotation of the main rotor as viewed from above. In the “Collective pitch min.” line set “forward” or “rear” to suit your personal preference. This setting applies equally to all subsequent mixers, and it is therefore vital that you do not change it later in order to alter individual mixer directions, such as the direction of collective pitch or throttle. stick mode 3sv(2rol) swashplate cut off –100% +150% 1 right rotor direct pitch min rear At this point, if you have not already done so, the servos should be connected to the receiver in the following sequence: Throttle servo or speed controller Receiver power supply Telemetry sensor or gyro gain Tail rotor servo (gyro system) Pitch-axis 1 servo Roll 1 servo Receiver power supply Roll 2 servo The mixer ratios and mixer directions for the swashplate servos for collective pitch, roll and pitch-axis are set in the … “Swashplate mixer” menu SP – MIXER ptch roll nick (page 112), +61% +61% +61% … where you will find that they are pre-set to +61% in each case. If the swashplate does not respond correctly to the stick movements, the first step is to change the mixer directions from “+” to “-” if necessary. The second recourse is to reverse the servo directions in the “Servo Programming example: model helicopter 167 33112_mx12_HoTT_2_GB.indd Abs48:167 06.06.2011 19:39:48 settings” menu. “Transmitter control settings” menu Note: Please note one important difference in later Graupner mc and mx radio control systems compared with earlier equipment: the first collective pitch servo and the throttle servo have been interchanged. “Servo settings” menu rev +100% +100% +100% +100% +100% +100% tr v Now move to the … S1 S2 S3 S4 S5 gyr free thr free lim ctrl7 0% 0% 0% 0% 0% cent (page 72), 100% 100% 100% 100% 100% 100% 100% 100% 100% 100% trav + … where you can set up the travels and directions of rotation of the individual servos. The basic aim here should be to keep servo travels at 100% wherever possible, as this maintains best possible resolution and accuracy. Use “Rev.” if necessary to change the direction of rotation of any servo; do check carefully that the direction you set really is correct. The tail rotor servo, in particular, must operate in such a way that the nose (!) of the helicopter moves in the direction which corresponds to the movement of the tail rotor stick. A glance at the … (page 76) … will show you that “ctrl 7”, i. e. the rotary proportional control CTRL 7, is assigned to the “Lim” input, whereas all other inputs are programmed to “free” by default. The “Lim” input serves as throttle limiter. It acts solely on output “6”, to which the throttle servo is connected. Just to remind you: • Using the “Throttle limiter” function eliminates the need to program an “Idle-up” flight phase. • The throttle limiter does not control the throttle servo; it simply limits the travel of this servo in the forward direction, according to the setting of the throttle limiter, when required. The throttle servo is usually controlled by the collective pitch stick via the throttle curve or curves you have set in the “Helimix” menu, for which reason input 6 should always be left “free”. For more details please refer to the sections on pages 96 and 97 of the manual. • Moreover the Ch 1 trim only affects a helicopter’s throttle servo. This section does not describe the special features of this trim (“cut-off trim”) again, as it is covered on page 40. (Thanks to the digital trims, trim values are automatically stored when you switch models and when you switch between flight phases.) • You will find a detailed description of the basic idle set-up procedure and the method of adjusting idle and throttle limit in the section starting on page 79. Now use the arrow button f of the left or right-hand four-way button to move to the “Travel” column, and increase the value in the highlighted field from 100% to 125%, with the throttle limiter at its forward end-stop. gyr free thr free lim ctrl7 +100% +100% +100% +100% +100% +125% tr v This ensures that the throttle limiter cannot possibly restrict the full throttle travel dictated by the collective pitch stick when the model is in flight. Set-up note for electric helicopters: Since electric motors by their nature require no idle setting, the only important point when setting up an electric-powered model helicopter is that the adjustment range of the throttle limiter should be set significantly higher and lower than the adjustment range of the speed controller, which is usually from -100% to +100%. It may therefore be necessary to adjust the “Travel” value of the throttle limiter to an appropriate value, such as a symmetrical 110% setting. However, further fine-tuning can be carried out exactly as described here for the glow-powered machine. An additional function needs to be activated in the … “Basic model settings” menu (pages 64 … 71). Even if you are a beginner to flying and are not yet ready for this, it is advisable at least to define the autorotation switch, so that you have an “emergency cut” switch for the motor. This is carried out by selecting the “Auto-rotation” line using the arrow buttons cd of the 168 Programming example: model helicopter 33112_mx12_HoTT_2_GB.indd Abs48:168 06.06.2011 19:39:48 left or right-hand four-way button, pressing the central SET button of the right-hand four-way button, and then moving the two-position switch (SW 3) to the “ON” setting. The switch number (in our example “3”) now appears on the right of the screen: rotor direct pitch min timer phase 2 autorotat. right rear 5:00 C3 hover ––– This switch should be located at a position on the transmitter where you can easily reach it without letting go of the stick, e. g. above the collective pitch stick. Note: For more information on setting up this “emergency OFF switch” please refer to the section in the centre column of the following page. And another tip: Please make it a habit to give all the switches a common “on” direction; then a quick glance at the transmitter before flying will soon reassure you that all switches are “off”. If you wish, you could at this point move up one line and assign a flight phase switch for flight phase 2, which is already assigned the name “Hover”, but this simple programming example deliberately excludes such refinements. You have now completed the basic settings at the transmitter, i. e. the procedure which you will need to use time and again when setting up a new model. The actual helicopter-specific set-up is carried out primarily in the … “Heli mixers” menu ptch ch1 thro tail ch1 gyro swash lim. normal (pages 94 … 105). 0% off SEL In the very first line you will see the “Collective pitch” function, and a brief press on the central SET button of the right-hand four-way button takes you to the appropriate sub-menu. At this point you will see a graphic representation of the collective pitch curve. This is initially defined by only three reference points, and in most cases this is quite adequate. Tip: Always try to manage with these three reference points initially, as additional points just complicate matters, and extra complexity is just what you don’t need at the moment. The reference point for hovering should generally be the mechanical centre-point of the collective pitch stick, as this position feels completely natural to most pilots. You can, of course, set up the curve to locate the hover at a different point, but you should not be tempted to do this unless you know exactly what you are doing. Start by setting the collective pitch stick to centre. Assuming that you previously adjusted the servos in accordance with the manufacturer’s instructions, the servo output arms will now (usually) be at right-angles to the servo case. If you have not already done so, adjust the mechanical linkages to the rotor head so that all the blades are set to a collective pitch angle of 4° to 5° positive for the hover. All known helicopters will fly at this setting. Now push the collective pitch stick fully forward to the maximum collective pitch point (the full-length vertical line indicates the current position of the stick). Adjust Point 5 on the collective pitch curve using the arrow buttons of the right-hand four-way button, with the aim of obtaining a maximum collective pitch setting of around 9° at the main rotor blades. This point should be at a value of around +50%. Note: A rotor blade set-up gauge, e. g. the Graupner item, Order No. 61, is very useful when setting up blade pitch angles, as you can read off the angles directly. Now pull the collective pitch stick right back to the collective pitch minimum position. Set the blade pitch angle for Point 1 to 0 to -4°, depending on your piloting ability. This produces a graph line with a slight angle at the hover point, forming what is known as the collective pitch curve. It might look approximately like this: ptch input –100% output –80% point 5 –80% normal If you now switch to the auto-rotation phase - you will see the name of the flight phase “Autorot” at bottom left on the screen - the “old” collective pitch curve will re-appear. In this phase you should set the same values as in the normal phase, with the following exception: increase the pitch angle at Point 5 (collective pitch maximum) by about 2°. This gives slightly more pitch for flaring the Programming example: model helicopter 169 33112_mx12_HoTT_2_GB.indd Abs48:169 06.06.2011 19:39:48 model when practising “autos” at a later (!) date. Once you have set up the collective pitch curve, operate the auto-rotation switch again, then briefly press the central ESC button of the left-hand four-way button to return to the helicopter mixer menu select point. Now we move on to the “Ch1 ¼ thro” line, where you can set up the throttle curve. The first step here is to enter the idle trim range by adjusting the throttle curve. Move the collective pitch stick to the minimum position, and set Point 1 to a value of around -65%. c1 thro input –100% output –65% point 5 –65% normal With the throttle limiter closed and the idle trim fully open, pull the collective pitch stick to the “fully back” position and move it slightly to and fro: the throttle servo should not respond to this movement. This arrangement gives you a seamless transition from idle trim to the throttle curve. You will probably need to make further adjustments to the throttle curve, but this process must be carried out later as part of the flight-testing procedure. If you now switch temporarily from this graph to the auto-rotation flight phase, you will see - instead of the usual display - the following: c1 thro off Autorot This means that the throttle servo has switched to a fixed value, which can be adjusted as follows: Press ESC to return to the menu list. Assuming that you are still in the auto-rotation phase, this will now include new sub-menus. The important line is “Throttle”, where you should set a value of around +125% or -125%, depending on the direction of servo rotation. ptch thro tail gyro swash lim. Autorot –125% 0% 0% off SEL This setting ensures that the motor stops reliably in the auto-rotation phase (to allow you to cope with an emergency). Later, when you have gained sufficient experience to practise auto-rotation landings, the setting should be changed to a value which provides a reliable idle. Set-up note for electric helicopters: Since the motor must be stopped completely if an emergency occurs with an electric-powered model helicopter, this setting can be adopted unchanged. Simply switch “Auto-rotation” off, and move back to the first menu list. Call up the set-up page of the “Ch1 ¼ tail rotor” menu: this is where you set static torque compensation (DMA) for the tail rotor. Once again, please restrict yourself to the three default reference points; everything else is the preserve of the experienced pilot. For the initial set-up - intended for a heading-lock gyro system - the uniform pre-set values of 0% should be changed to -30% at Point 1 (collective pitch minimum) and +30% at the opposite end, Point 5 (collective pitch maximum), although you may find it necessary to adjust the settings slightly later. c1 tail input –100% output –30% point 5 –30% normal Now switch back to the auto-rotation phase for a moment. The set-up curve is disabled here, with the result that the tail rotor servo no longer responds to collective pitch commands (when the main rotor is not powered, there is no rotor torque to be corrected). The - static - pre-set of the gyro effect principle (“normal” or “heading lock” mode), and also the gyro gain can now be altered by setting a value other than “0” in the “Gyro” line: At present the remaining sub-menus are of no interest. 170 Programming example: model helicopter 33112_mx12_HoTT_2_GB.indd Abs48:170 06.06.2011 19:39:48 ptch ch1 thro tail ch1 gyro swash lim. normal gyr ctrl 8 thr free lim ctrl 7 0% off SEL tr v Please be sure to read and observe the set-up instructions supplied with your gyro at this point, as there is a possibility that your helicopter will be uncontrollable if you set it up incorrectly! If your gyro features gain control from the transmitter unlike the type we are using in this example - you will need another free proportional control for it, e. g. CTRL 8. This can be assigned to the “Gyro” input in the … “Transmitter control settings” menu gyr ctrl 8 thr free lim ctrl 7 +50% +50% +100% +100% +100% +100% (page 76). +100% +100% +100% +100% +100% +100% tr v Turn the rotary control until its number (transmitter control number) appears on the screen, then use the arrow button f of the left or right-hand four-way button to move to the ASY field in the “Travel” column. Briefly press the central SET button of the right-hand four-way button, and you will be able to set a maximum gyro gain such as 50% in the now highlighted field: This represents a safe fixed value which is maintained as long as the rotary control is at its right-hand end-stop. You will probably need to adjust the value in the course of flight-testing. Additional notes on setting up gyros can be found on pages 98 / 99. Further adjustments If you have followed this programming example, you will have a helicopter which is set up properly, and in an ideal state for hovering practice and simple circuits. Of course, you may wish to activate further functions depending on your skill and flying experience. If you wish to fly using different rotor speeds and trim set-ups, you will need to activate a series of “flight phases”, which can be called up via switches which you assign. The first step in this process is to call up the … “Basic model settings” menu rotor direct pitch min timer phase 2 autorotat. rotation always has absolute precedence over any other phases. This simply means: if you operate the auto-rotation switch, you immediately move to the autorotation phase from either of the other two flight phases (“normal” phase and “phase 2”). Now move back to the “Helimix” menu, switch to “Phase 2” (which you have just set up), and modify the settings accordingly. Since the mx-12 HoTT features digital trims, in the Heli program all the trim positions for the control functions “roll”, “pitch-axis” and “tail rotor” are stored separately for each flight phase, in addition to the other menu settings which you entered separately for each flight phase (see page 94). For example, if the motor run is limited by the fueltank size or battery capacity, you should set the stopwatch to count down. Enter the maximum possible motor run time, e. g. “5 min.”. The transmitter’s sounder now starts emitting warning sounds starting at “30 s” before “zero”, as described on page 67 / 68. You could assign the transmitter control switch “G3” to this timer, by first activating switch assignment and then turning the throttle limit control from its idle position in the direction of full-throttle: (pages 64 … 71) right rear 10:01 C3 hover … assign a switch to “Phase 2”, e. g. SW 7, and enter a relevant name (if you wish). It is important to be quite clear in your mind that auto- 3sv(2rol) swashplate cut off –100% +150% 1 right rotor direct pitch min rear 5:00 C3 timer With the stopwatch halted, press the cd or ef buttons of the left-hand four-way button (CLEAR) simultaneously at the basic display, so that the stopwatch switches to the “Timer” function. The timer then starts Programming example: model helicopter 171 33112_mx12_HoTT_2_GB.indd Abs48:171 06.06.2011 19:39:48 automatically when you move the throttle limit slider towards full-throttle, and stops again when you move the limiter back to the idle range. Suggested refinement: speed governor At some time you may wish to install a speed governor (regulator) in your helicopter, e. g. the mc-Heli-Control, to try flying with a system rotational speed which is automatically maintained at a constant value. It makes sense to couple the individual rotor speeds with the flight phases, as this enables you to carry out further fine-tuning. The initial requirement when programming the transmitter is to install and program the speed governor exactly in accordance with the manufacturer’s instructions. A practical suggestion, which includes the throttle limiter function, can be found in the section starting on page 96. If you have set up your helicopter as described in this programming example, you will find that it is capable of carrying out extremely challenging flight tasks even though it is not suitable for competition work. We suggest that you should not make use of additional functions until your model is flying perfectly, so that you will be in a position to recognise and appreciate any improvements. Whenever possible, it is always best to implement additional refinements one at a time, otherwise you won’t know which change has brought about any improvement. Bear in mind that the good pilot is not recognised by the number of complex functions with which he can cope, but by the results he can obtain when flying a relatively simple set-up. 172 Programming example: model helicopter 33112_mx12_HoTT_2_GB.indd Abs48:172 06.06.2011 19:39:48 For your notes 173 33112_mx12_HoTT_2_GB.indd Abs60:173 06.06.2011 19:39:48 Appendix PRX (Power for Receiver) Order No. 4136 Graupner HoTT GPS / Vario module Order No. 33600 Graupner HoTT Vario module Order No. 33601 A highly developed stabilised receiver power supply with intelligent power management. The unit constitutes a stabilised user-selectable power supply for the receiver, and provides a further enhancement in the reliability of the airborne power supply. It is designed for use with different types of receiver battery, to ensure that it is straightforward and versatile in use. When the model is operating, even brief collapses in battery voltage are stored and displayed, offering the user the means of detecting a receiver battery which is not “up to the job”, or failing. • For use with one or two receiver batteries (simultaneous discharge if two batteries are employed) • Suitable for five-cell or six-cell NiMH batteries, or two-cell LiPo or LiFe packs. Graupner/JR, G3.5, G2 and BEC connector systems. • Three user-selectable receiver power voltage levels: 5.1 V / 5.5 V / 5.9 V. • Two ultra-bright LEDs indicate the operational status of batteries 1 and 2 separately. • Integral high-quality On / Off switch. • Constructed to cope with high-current applications. • Low-profile switch and LEDs to avoid spoiling the appearance and efficiency of the model. • Straight-through design of mounting lugs, LEDs and switch for simple installation using drilling template (supplied). Vario with altitude signals and five different tones for climb and descent, plus GPS with range measurement, distance measurement, speed indicator, display of flight direction and co-ordinates • Additional warning thresholds for min. altitude, max. altitude, twostage climb and descent rate • Altitude display, storage of min. and max. altitude • Variable warning time: OFF, 5, 10, 15, 20, 25, 30 seconds, constant • Variable warning repeat time: constant, 1, 2, 3, 4, 5 min, once • The GPS / Vario sensor can be connected directly to the receiver’s telemetry input. Vario with altitude signals and five different tones for climb and descent; altitude display and storage of min. and max. altitude. • Additional warning thresholds for min. altitude, max. altitude, twostage climb and descent rate • Variable warning time: OFF, 5, 10, 15, 20, 25, 30 seconds, constant • Variable warning repeat time: constant, 1, 2, 3, 4, 5 min, once • The vario sensor can be connected directly to the receiver’s telemetry input. Specification, vario • Altitude measurement: -500 m ... +3000 m • Resolution: 0.1 m • Sensitivity, vario: 0.5 m/3s, 1 m/3s, 0.5 m/s, 1 m/s, 3 m/s, programmable per beep • Calculated average value: 4 - 20 measurements per measured value, programmable Specification • Altitude measurement: -500 m ... +3000 m • Resolution: 0.1 m • Sensitivity, vario: 0.5 m/3s, 1 m/3s, 0.5 m/s, 1 m/s, 3 m/s, programmable per beep • Calculated average value: 4 - 20 measurements per measured value, programmable 174 Appendix 33112_mx12_HoTT_2_GB.indd Abs49:174 06.06.2011 19:39:48 Graupner HoTT General Engine Module Order No. 33610 Graupner HoTT General Air Module Order No. 33611 Graupner HoTT Electric Air-Module Order No. 33620 General sensor for Graupner HoTT receivers and models with internalcombustion or electric power system: • 2 x temperature and voltage measurements with warning thresholds for min. and max. voltage and min. and max. temperature • Individual cell measurement with min. voltage warning thresholds • Voltage, current and capacity measurement with warning thresholds for min. and max. voltage, max. capacity and max. current • Programmable current limiting • Current measurement with 2 x 1 mOhm shunt resistors in parallel = 0.5 mOhm • Rev-count measurement and warning thresholds for min. and max. rotational speed • Fuel measurement with warning thresholds in 25% increments (requires software update) • User-variable warning time: OFF, 5, 10, 15, 20, 25, 30 seconds, constant • User-variable warning repeat time: constant, 1, 2, 3, 4, 5 min, once • 2 x temperature measurement, optionally 0 to 120°C or 200°C, also voltage measurement up to 80 V DC • 1 x rev-count measurement up to 100,000 rpm with two-blade propeller • 1 x speed controller / servo input, 1 x speed governor input, 1 x speed controller / servo output for rotational speed governor • etc. see product at www.graupner.de General sensor for Graupner HoTT receivers and models with internalcombustion or electric power system: • Vario with altitude signals, climb and descent signals, and additional warning thresholds for min. altitude, max. altitude, climb and twostage descent rate • Altitude indicator (-500 … +3000 m), storage of min. and max. altitude • 2 x temperature and voltage measurements with warning thresholds for min. and max. voltage and min. and max. temperature • Individual cell measurement with min. voltage warning thresholds • Voltage, current and capacity measurement with warning thresholds for min. and max. voltage, max. capacity and max. current • Rev-count measurement and programmable speed governor, also warning thresholds for min. and max. rotational speed • Fuel measurement with warning thresholds in 25% increments (requires software update) • User-variable warning time: OFF, 5, 10, 15, 20, 25, 30 seconds, constant • User-variable warning repeat time: constant, 1, 2, 3, 4, 5 min, once • 2 x temperature measurement, optionally 0 to 120°C or 200°C, also voltage measurement up to 80 V DC • 1 x rev-count measurement up to 100,000 rpm with two-blade propeller • etc. see product at www.graupner.de General sensor for Graupner HoTT receivers and electric-powered models: • Vario with altitude signals, climb and descent signals, and additional warning thresholds for min. altitude, max. altitude, two-stage climb and descent rate • Altitude indicator (-500 … +3000 m), storage of min. and max. altitude. • 2 x temperature and voltage measurements with warning thresholds for min. and max. voltage and min. and max. temperature • Individual cell measurement 2 ... 14S with min. voltage warning thresholds • Voltage, current and capacity measurement with warning thresholds for min. and max. voltage, max. capacity and max. current • User-variable warning time: OFF, 5, 10, 15, 20, 25, 30 seconds, constant • User-variable warning repeat time: constant, 1, 2, 3, 4, 5 min, once • 2 x temperature measurement, optionally 0 to 120°C or 200°C, also voltage measurement up to 80 V DC • 1 x speed controller input, 1 x speed controller output for power reduction due to low voltage of individual cells • 1 x current, voltage and capacity measurement, up to 150 A (peak 1 sec. 320 A) and up to 60 V • 1 x individual cell monitoring for 2 - 14S Lithium batteries (LiPo, LiIo, LiFe) • etc. see product at www.graupner.de Appendix 175 33112_mx12_HoTT_2_GB.indd Abs49:175 06.06.2011 19:39:52 Graupner HoTT RPM magnet sensor Order No. 33616 Graupner HoTT Smart-Box Order No. 33700 Optional speech output module for Graupner mx-12 HoTT Order No. 33001.71 Graupner HoTT RPM optical sensor Order No. 33615 A vast range of different functions combined in a single device: that’s what destines the SMART-BOX to be your intelligent companion in future. Whether you want to display telemetry data in real time, or enter changes to your HoTT system, the large-area screen with 8 x 21 characters makes the task simple. The flexible Smart-Box includes an integral buzzer for generating audible signals and warnings for even greater flexibility and practicality. The installation set supplied makes it easy to mount the unit on the support bars of hand-held transmitters, allowing you to position it in such a way that you can read off telemetry data in real time while you control your model. The user-update facility ensures that the SMART-BOX is always up-todate, and provides a route for expanded functions in future. • Transmitter voltage display with • Country setting user-variable warning threshold • Range check • Signal quality • Receiver temperature • Receiver voltage • Servo reverse • Servo neutral position • Servo travel • Cycle time • Channel swap • Fail-Safe settings • Mixer settings • Servo test Dimensions: approx. 76 mm x 72 mm x 17 mm (L x W x H) Weight: approx. 55g This optional module forms the output device for the transmitter’s audible signals as well as the signals and speech output associated with the Telemetry menu. All speech output is in the German language as standard. To use the module you will also need standard headphones or an earphone with a 3.5 mm barrel connector, which can be purchased from any electrical retailer. The volume of the earphone socket can be adjusted in the “Voice volume” line of the “General settings” menu; see page 115. 176 Appendix 33112_mx12_HoTT_2_GB.indd Abs49:176 06.06.2011 19:39:56 FCC Information Graupner mx-12 HoTT #33112 FCC ID:ZKZ-MX-12 FCC ID: ZGZ-mx-12 FCC Label Compliance Statement This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference. 2. This device must accept any interference received, including interference that may cause undesired operation. • Connect the equipment into an outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. RF Exposure RF warningStatement statement: This device has been evaluated to meet the FCC RF The device has been evaluated to meet general exposure requirement when used in combination with RF exposure requirement. The device can be the genuine Graupner HoTT accessoires and operated used in portable exposure condition without with minimum distance of 20 cm between the antenna restriction. and your body. WARNING: Changes or modifi cations not expressly approved by the party responsible for compliance could void the user‘s authority to operate the equipment. NOTE This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna. • Increase the separation between the equipment and receiver. 178 FCC Information 33112_mx12_HoTT_2_GB.indd Abs55:178 06.06.2011 19:39:58
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