Sankyo Sandex 11Ar Users Manual

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SERVO DRIVE TYPE

OPERATION AND MAINTENANCE MANUAL

11AR

ALPHA SERVO DRIVE INDEX

Optimum Reliability in Motion Control

11

Preface

Thank you for purchasing a SANDEX product. These instructions cover installation procedures, linkage

procedures, and maintenance precautions to be followed to ensure maximum performance from this

product. Please read these instructions carefully before installing or trial operating of this product.

After unpacking, make sure the product delivered fits your ordering specifications.

a: Size

Shaft to shaft distance

Availability: 7=70mm, 9=90mm, 11=110mm, and 15=150mm

b: Model AR=Alpha series Roller drive type

c: Roller Drive

Type of roller drives

Availability:

S01=Roller gear ratio; 1/12, Mounting position; 1

S02=Roller gear ratio; 1/12, Mounting position; 2

S05=Roller gear ratio; 1/12, Mounting position; 5

d: Motor & Bracket

Type of Motor & Bracket

Availability:

A=Standard (Pulley ratio; 7&9AR=1/3, 11&15AR=1/2)

e: Motor Driver

Type of Motor Driver

Availability:

99 ARAR -- S01S01 AA 00 00 00 00 XX

|

aa |

bb |

cc |

dd |

ee |

ff |

gg |

hh |

II

April 2002

22

0=Single phase 200 to 230VAC for 7AR & 9AR

1=Three phase 200 to 230VAC for 11AR & 15AR

2=Three phase 380 to 480VAC for 11AR & 15AR

f: Controller

Type of controller

Availability:

0=Standard

x=Special requirements

g: Cable

Type of cables

Availability:

0=3 meters length, w/o conduit

1=5 meters length, w/o conduit

2=10 meters length, w/o conduit

3=15 meters length, w/o conduit

4=3 meters length, w/ conduit

5=5 meters length, w/ conduit

6=10 meters length, w/ conduit

7=15 meters length, w/ conduit

Y=Connectors Only

h: Control Software

Type of control software

Availability:

0=Standard

x=Special requirements

I: Special Instructions

Include the symbol X in case of special orders

No symbols= Standard

33

Safety Precautions

 Symbols to ensure the safe and proper use of the Variax

The following symbols are used this manual where safety precautions must be observed. Read

and understand the meanings of these symbols to ensure the safe and proper use of Variax.

Failure to obey these precautions can cause machine problems, accidents, or other unexpected

behavior.

Warning

Indicates a potentially hazardous situation, which may result

in death or serious injury.

Caution

Indicates a potentially hazardous situation, which may result

in minor or moderate personal injury or damage to the

equipment.

Meaning of symbols

In general, this symbol alerts you to an action or operation that you

must not do.

General prohibition

Do Not Touch

In general, this symbol alerts you to the possibility of damage

to you or your equipment.

General

Warning

Electrical

Hazard

Pinch Point

High

Temperature

This symbol alerts you to actions that are reserved for

qualified service personnel only

Mandatory Action

Electrical Grounding

44

Contents

PREFACEPREFACE

SAFETY PRECAUTIONSSAFETY PRECAUTIONS

SAFETY PRECAUTIONSSAFETY PRECAUTIONS 33

 SSYMBOLS TO ENSURE THEYMBOLS TO ENSURE THE SAFE AND PROPER USE SAFE AND PROPER USE OF THE OF THE VVARIAXARIAX 33

1. OPERATING THEORY1. OPERATING THEORY 66

2. HANDLING YOUR SA2. HANDLING YOUR SANDEXNDEX 77

2.12.1 IIDENTIFYING DENTIFYING AALPHA LPHA SSERVO LAYOUTERVO LAYOUT 77

3. TRANSPORTATION A3. TRANSPORTATION AND ENVIRONMENTND ENVIRONMENT 88

3.13.1 SSHIPPING CONDITIONHIPPING CONDITION 88

3.2 3.2 TTEMPERATURESEMPERATURES 88

3.33.3 MMOISTUREOISTURE 88

3.43.4 DDUSTUST 88

4. INSTALLATION4. INSTALLATION 1010

4.1 CASING MAIN BODY 1010

4.2 DRIVER 1010

4.2.1 STORAGE CONDITIONS 10

4.2.2 INSTALLATION SITE 11

4.2.34.2.3 ORIENTATIONORIENTATION 11

4.2.44.2.4 WIRING THREE PHASE 2WIRING THREE PHASE 200VAC00VAC 12

4.2.54.2.5 WIRING THREE PHASE 4WIRING THREE PHASE 400VAC00VAC 13

4.3 CONTROLLER 1414

4.3.1 MOUNTING THE MP940 14

4.3.24.3.2 CONNECTION OF PERIPHCONNECTION OF PERIPHERAL DEVICESERAL DEVICES 15

4.44.4 WWIRINGIRING 1616

4.4.14.4.1 I/O CIRCUITSI/O CIRCUITS 17

4.4.24.4.2 CONTROLLER I/O CONNECONTROLLER I/O CONNECTIONSCTIONS 18

5.OPERATION5.OPERATION 1919

5.15.1 SSETTING ENCODER ZERO ETTING ENCODER ZERO POSITIONPOSITION 1919

5.25.2 SSETTING ZERO POSITIONETTING ZERO POSITION ((STARTING POSITIONSTARTING POSITION)) 1919

5.35.3 I/O I/O TIMING CHART WHILE ITIMING CHART WHILE IN JOG MODEN JOG MODE 2020

5.45.4 I/O TIMING CHART WHILE IN AUTOMATIC MODE 2121

5.55.5 IINDEXING TIME VSNDEXING TIME VS. . STOPS CHARTSTOPS CHART 2222

55

5.65.6 DDATA SWITCH SETTINGSATA SWITCH SETTINGS 2222

6. HANDLING PROCEDU6. HANDLING PROCEDURES FOR THE RES FOR THE OUTPUT SHAFTOUTPUT SHAFT 2323

6.16.1 TTABLE TYPE OUTPUTABLE TYPE OUTPUT 2323

7. LUBRICATION7. LUBRICATION 2424

4.54.5 PPURPOSE OF LUBRICATIOURPOSE OF LUBRICATIONN 2424

7.27.2 OOIL SELECTION PRECAUTIL SELECTION PRECAUTIONSIONS 2424

7.37.3 LLUBRICATING OIL VISCOUBRICATING OIL VISCOSITYSITY’’SS 2525

7.47.4 RRECOMMENDED LUBRICATIECOMMENDED LUBRICATING OILNG OIL 2525

8. FILLING AND REPL8. FILLING AND REPLACING LUBRICATING OIACING LUBRICATING OILL 2626

8.18.1 RREFILLING LUBRICATINGEFILLING LUBRICATING OILS OILS 2626

8.28.2 OOIL REPLACEMENT SCHEDIL REPLACEMENT SCHEDULEULE 2626

9. LUBRICATION GREA9. LUBRICATION GREASESSES 2727

9.19.1 SSUPPLYING LUBRICATINGUPPLYING LUBRICATING GREASE GREASE 2727

10. REPAIRS AND MAI10. REPAIRS AND MAINTENANCENTENANCE 2828

10.110.1 YYASKAWA ASKAWA DDRIVER AND RIVER AND CCONTROLLERDISPLAY CODONTROLLERDISPLAY CODESES 2929

10.210.2 TTROUBLESHOOTING PROCEROUBLESHOOTING PROCEDURES DURES (1)(1) 3131

10.310.3 TTROUBLESHOOTING PROCEROUBLESHOOTING PROCEDURES DURES (2)(2) 3232

Unit 2

Handling your Sandex

66

1. Operating theory

SANDEX units operate based on the following principal. A globoidal cam is mounted onto the input

shaft. This cam interlocks with the turret portion of the output shaft. The turret has cam followers along

its perimeter, which are in contact with the tapered ribs on the cam. This contact or pressure is called

the preload. Turning the input shaft rolls the cam followers along the rib surfaces thereby rotating the

turret according to the curve of the cam. The turret is motionless when the ribs are parallel with the

edges of the cam although the cam followers stay in motion.

Two of three cam followers are always kept pressed against the tapered ribs to ensure an accurate

transmission of rotation. Any backlash or movement between the tapered rib surfaces and cam

followers can cause vibrations, noise, and also damage the cam and cam follower surfaces. Backlash

can be completely eliminated by rotating the eccentric flange that holds the input shaft, and minimizing

the distance between the input and output shaft.

Explanation of terms used with indexing equipment

TERM DEFINITION

Number of stops The number of stops determined by the customer’s programming.

A predetermined number of stops have been programmed into the

controller (1-16) CW or CCW.

Index angle The index angle is dependant on the number of stops.

Dynamic Torque output

rating(Top) The maximum torque that can be applied on the output shaft

during indexing phases. Directly related to machine life.

Unit 2

Handling your Sandex

77

2. Handling your SANDEX

Over 90% of the mechanical failures reported with roller gear cam equipment comes from careless

or improper handling. Improper handling not only reduces the life of your SANDEX unit, it can also

affect the performance of both the SANDEX unit and your machine.

2.1 Identifying Alpha Servo layout

2.2 Handling your Alpha Servo

(1) Torsion and deflection within the rotation transmission system

(2) Frictional torque within the rotation transmission system

(3) Frequent load charge

(4) Usage under rust stimulant conditions such as water, acid, or alkali

(5) Usage in dusty areas

(6) Electrical currents

(7) Improper maintenance and repairs

(8) Mounting areas with insufficient rigidity

Servomotor

Roller Drive

Fixed hollow flange

Installation surface

for indexing table.

Installation for

fixed table.

Oil cap

Oil gauge

*Drain

Mounting hole

at W-surface

Servomotor

mounting bracket

Unit 3

Transportation and environment

88

3. Transportation and Environment

3.1 Shipping condition

(1) All SANDEX products are thoroughly inspected after the final assembly. Only those

products that pass this inspection are shipped.

(2) Before shipped, each SANDEX unit is filled with lubrication oil in accordance to the

customer’s operating speed and environment.

(3) A rust preventative solution is applied to the input /output shafts, key, and mounting

surface. Vinyl tape is also used extensively to protect your SANDEX unit from

scratches while transporting.

Remove the rust preventative solution with a light oil or thinner. Be careful not to let the

light oil or thinner contact the oil seal. Never use thinner on or near the plastic sight gauge.

This may cause severe clouding of the material.

3.2 Temperatures

(1) For use between -20 to 0 degrees Celsius, (-4 to 32°F) use a lubricating oil with a lower

viscosity than the recommended oil. This is because the dynamic viscosity of the

lubricating oil rises in low temperatures and may not allow proper speed acceleration.

(2) For use between 40 to 70 degrees Celsius, (104 to 158°F) use lubricating oil with a

higher viscosity than the recommended oil. This is because the dynamic viscosity of the

lubricating oil lowers in higher temperatures and reduce the life of the equipment.

(3) For use between 70 to 100 degrees Celsius, (158 to 212°F) replace the oil seal and O-ring

with a heat resistant synthetic rubber.

3.3 Moisture

Rust may occur in storage or if the main machine is washed with water. Water does not

have to come directly into contact with the unit to cause rust. Moisture, condensation, and

other sources of humidity can also cause rust.

To use under these conditions, the mounting surfaces and shafts of the unit must be

painted, or otherwise rust proofed. Applying mineral oil or grease to the mounting surfaces

has a rust preventative effect and should always be practiced.

In addition, if the unit is directly subject to water, the sealing devices on the input and

output must be changed to a waterproof construction.

3.4 Dust

SANDEX units are generally built resistant to dust. This is because the roller gear cam

mechanism is enclosed within its own housing, and then sealed off at the input and output

with an oil seal. However, depending on the amount of dust or other foreign particles, the

Unit 3

Transportation and environment

99

oil seal may wear and thereby cause oil leaks. This is particularly evident when chemicals

are used. Chemicals can also cause andor accelerate rust and corrosion. When using

your SANDEX unit in dusty areas, you should consider using protective covers made from

stainless steel or plastic.

If the location for your SANDEX unit is very dusty, the air outlet in the oil

fill port may become an entrance into the housing. Placing an air filter over

this port should prevent dust from entering the housing. Electrical currents

If electricity passes through the SANDEX unit, minute dimples can occur on the cam

followers and roller gear cam, as well as on the rolling surfaces and members of the

bearings.

““Electrolytic corrosion” is where electrical sparks actually melt away the surfaces of

the rolling members. Electrolytic corrosion is a current-based effect. Therefore, it can

occur under less than one volt of electrical power.

If your SANDEX unit may be subject to electrical currents, make sure to insulate it.

Electrolytic corrosion, if allowed to persist, will increase the amount of vibration and noise,

and eventually render your SANDEX unit useless. Always insulate the table and unit from

welding applications or other automated machinery that use large amounts of electrical

current.

When linking the motor with the input system, consider using rubber couplings instead

of metal types. Rubber provides more insulation. Other measures that can prevent

electrolytic corrosion include using V-belts and timing belts.

Unit 4

Installation

1010

4. Installation

Another crucial factor to the performance of your SANDEX unit is the operating environment. Make an

early review of the location for your SANDEX unit and take any corrective actions necessary.

4.1 Casing main body

(1) Always use the lifting bolt holes provided on the housing of your SANDEX unit. Do not lift

the unit using the input or output shafts as this can affect the precision of the equipment, or

worse, affect the life of the machine.

(2) Each SANDEX unit has oil fill, drain and sight gauge ports. The unit should be mounted for

easy maintenance access to these ports.

(3) To ensure that your SANDEX unit is mounted accurately in the best possible position, make

sure the housing, shaft dimensions, and mounting holes comply with drawing specifications.

Also check the mounting area for perpendicularity and flatness. If the mounting surface has

any scratches, burrs, debris, or paint, use an oilstone or emery paper to remove it. Next,

clean the mounting surface and apply a light coat of grease or mineral oil to prevent rust

and scratches. You may now mount your SANDEX unit. Never install the unit in a position

not specified for your particular product.

(4) Align your peripheral equipment with the input and output shafts on the SANDEX unit to

ensure the best possible mounting position.

Apply Loctite 242 or equivalent screw locking solution to the mounting bolts, and tighten to

the specified torque with a torque wrench. (Tightening torque: DIN 8.8)

(5) The foundation for your SANDEX unit must be rigid enough to withstand vibrations from

other machines. The foundation is crucial to the precision and life of your SANDEX unit.

To ensure maximum performance mounts your SANDEX unit on a foundation that is

smooth, flat, hard, and free from vibration.

The standard operating temperature range for SANDEX units is between 0 to 40 degrees

Celsius (32 to 104°F). For usage outside of this range, follow the tips below.

4.2 Driver

The SGDH servo amplifiers are base-mounted. Incorrect installation will cause

problems. Follow the installation instructions below.

4.2.1 Storage Conditions

Store the servo amplifier within the following temperature range, as long as it is

stored with the power cable disconnected. -20 to 85°C (-4 to 185°F)

Unit 4

Installation

1111

4.2.2 Installation Site

The following precautions apply to the installation site

4.2.3 Orientation

Install the servo amplifier perpendicular to the wall as shown in the figure. The servo

amplifier must be oriented this way because it is designed to be cooled by natural convection

or by a cooling fan. Secure the servo amplifier using the mounting holes. The number of

holes varies (from two to four) with the frame size of the servo amplifier.

Situation

Installation Precaution

Installation in a Control Panel Design the control panel size, unit layout, and cooling

method so the temperature around the servo amplifier

does not exceed 55°C (131°F).

Installation Near a Heating Unit

Minimize heat radiated from the heating unit as well as

any temperature rise caused by natural convection so

the temperature around the servo amplifier does not

exceed 55°C (131°F).

Installation Near a Source of

Vibration Install a vibration isolator beneath the servo amplifier to

avoid subjecting it to vibration.

Installation at a Site Exposed to

Corrosive Gas

Corrosive gas does not have an immediate effect on the

servo amplifier, but will eventually cause electronic

components and contactor-related devices to

malfunction. Take appropriate action to avoid corrosive

gas.

Other Situations Do not install the servo amplifier in hot and humid

locations or locations subject to excessive dust or iron

powder in the air.

Unit 4

Installation

1212

4.2.4 Wiring Three Phase 200VAC

Unit 4

Installation

1313

4.2.5 Wiring Three Phase 400VAC

Unit 4

Installation

1414

4.3 Controller

4.3.1 Mounting the MP940

1. Insert the two mounting tabs on the bottom of the MP940 into the mounting holes

on the lower right side of the SGDH.

2. Pressing in the direction of the arrows, insert the mounting tabs on the top of the

MP940 into the mounting holes on the top right side of the SGDH.

3. Insert the MP940 module fixing spring into the hole on the top of the SGDH.

4. While pulling on the fixing spring, pull the spring mounting hook on the top of

the MP940 case.

5. Mount the bottom spring in the same manner as in step 4. Refer to the

following diagrams when mounting the MP940 to a servo amplifier. There are

two kinds of mounting springs; they differ in shape according to the servo

amplifier capacity.

Unit 4

Installation

1515

4.3.2 Connection of Peripheral Devices

Motor power, and encoder are standard cables that are supplied by Sankyo America

Inc. The I/O connections are made by one of two options (see 4.4.2). The source power

cables will be supplied by the customer.

Switch Box Or PLC

Unit 4

Installation

1616

4.4 Wiring

1.) Power Supply Connector Cable

Supplies DC +24V 400mA power supply to the MP940 module. The

connectors use a screw-mount terminal block BL3, 5/3F-AU (Weidmuller,

Inc.).

Pin# Signal Name Name

3 +24V +24VDC input

2 GND 0V

1 FG Frame ground

2.) Input Cable Preparing Procedure

Use a twisted pair with a wire size of AWG#24 to AWG#20 when connecting the

24VDC power supply and MP940 Module power supply connector.

Unit 4

Installation

1717

4.4.1 I/O Circuits

24V 100mA

output load

signals

17.4-28.8VDC

5.3mA rated

current

Unit 4

Installation

1818

4.4.2 Controller I/O connections

The pigtail cable, and the cable with terminal

block are available options for your connection

Note: N/A connections are not

needed for the Alpha Servo

application.

Unit 5

Operation

1919

5.Operation

Generally, automated machinery using SANDEX units are complicated in design. This is based on the

large number of linkage involved. Such machinery generally uses the cams and linkages for obtaining

overlapped movements. However, one will almost always encounter interference problems if he operates

the equipment prematurely. To avoid this type of problem, the input drive should be test turned by hand,

as each component is mounted.

5.1 Setting encoder zero position

a) Press the DSPL/SET key to select the auxiliary function mode.

b) Select the user constant Fn008. Press the  or  cursor key to select the digit to set, and

then press the  or  cursor key to change the number.

c) Press the DATA/ENTER key for the following display to appear.

d) Using the  cursor key change this value to

e) When the display reads “PGCL5” press the DISPL/SET key then the display will flash

“done” for one second then return to “PGCL5”.

f) Reset the 24VDC power to finish the absolute encoder’s setup operation.

5.2 Setting zero position (starting position)

The Sankyo Alpha series index drive is equipped with a servomotor as part of our standard

package. Manual adjustment for positioning and timing purposes of the indexing drive can

easily be accomplished by using the jog feature. After entering jog mode and locating zero

position (starting point) exit jog mode. Once the jog mode has been exited the zero position

will be established. Once this method has been completed please do not enter the jog mode

unless you wish to reset the zero position.

F

n

0

0

0

F

n

0

0

8

P

G

L

C

1

P

G

L

C

1

d

o

n

e

Unit 5

Operation

2020

5.3 I/O timing chart while in jog mode

A) Input Signals

1) Servo ON: This signal will activate the driver and await user commands. If there are no errors

the ready output signal will also be activated.

2) Auto/Jog: This signal will cause the controller to go into jog mode and await a start signal.

3) Start: While in jog mode this signal will start the rotation of the motor’s output shaft. When

this signal is not present the motor will stop rotating.

4) CW/CCW: This signal will cause the servomotor to jog in a counterclockwise (CCW)

direction. When this signal is not activated the motor will jog in a clockwise (CW) direction.

B) Output Signals

1) Ready: This signal will be activated when there are no errors, and the drive is on.

2) Alarm: This signal will be activated whenever there is an alarm present in the drive.

3) Busy: This signal will be activated whenever the drive senses movement of the motor.

Unit 5

Operation

2121

5.4 I/O timing chart while in automatic mode

C) Input Signals

1) Servo ON: This signal will activate the driver and await user commands.

If there are no errors the ready output signal will also be activated.

2) Auto/Jog: This signal is not activated causing the controller to begin auto mode and

await a start signal.

3) Start: While in auto mode this signal will start the preprogrammed motion that was

written by Sankyo America. Each of these units will be programmed in accordance

with the customer’s specifications.

4) CW/CCW: This signal will cause the servomotor to execute the preprogrammed

motion in a counterclockwise (CCW) direction. When this signal is not activated the

motion will rotate in a clockwise (CW) direction.

Unit 5

Operation

2222

5.5 Indexing time vs. stops chart

5.6 Data switch settings

Data

Program#

3 bit 2 bit 1bit 0bit Stops Index Angle

[degree] Index time

[sec]

0 1 360 3.172

1 On 2 180 1.636

2 On 3 120 1.124

3 On On 4 90 0.868

4 On 5 72 0.714

5 On On 6 60 0.612

6 On On 7 51.42857 0.539

7 On On On 8 45 0.484

8 On 9 40 0.441

9 On On 10 36 0.407

10 On On 11 32.72727 0.379

11 On On On 12 30 0.356

12 On On 13 27.69230 0.336

13 On On On 14 25.71428 0.319

14 On On On 15 24 0.305

15 On On On On 16 22.5 0.292

Index time- # Stops chart

0.0

0.5

1.0

1.5

2.0

2.5

3.0

3.5

1 2 34 5 6 7 8 9 10 11 12 13 14 15 16

# Stops

Index time in seconds

Unit 6

Handling Procedures

2323

6. Handling procedures for the output shaft

The output shaft on an indexing drive is subject to momentous torque during starting

and stopping. Therefore, the shaft must be torsionally rigid. To maintain positioning

accuracy, the output shaft must have minimal run out. The run out on a standard SANDEX

is within 0.02 mm (.0008).

Note

The SANDEX is designed to show accuracy as it stops. When aligning shafts, do so after

repeated indexing and make sure the shaft is in a dwell.

There are different handling methods for various configurations of the final turret. The

following indexing drive handling procedures also apply for roller drives and oscillating

drives.

6.1 Table type output

(1) Table type output sections have a broader mounting surface than flange type output.

Tables can be mounted easily and accurately.

(2) To accurately position work stations on the table, enlarge the hole in the center of the

table from 0.1 to 0.2 mm (.004  .008). Align the table. Then, tighten the bolts and

drive locating pins into place. Our recommendation of size of bolts and tighten torque is

as following.

Mounting bolts Recommended knock pin

Size Tighten torque Place Hole depth

7AR 6-M6 13.5 N· m P.C.D. 85 12 mm

9AR 6-M6 13.5 N· m P.C.D. 120 12 mm

11AR 6-M8 34 N· m P.C.D. 150 16 mm

15AR 6-M10 67.5 N· m P.C.D. 210 20 mm

(3) The center of output shaft has a fixed flange with a hole in it. This fixed flange is suitable

for directly mounting fixed tables. A hole can be drilled in the mounting base in line with

the center of the output shaft for concealing wiring and plumbing.

Through-hole

Fixed table

Indexing

T

able

Table-type

Mounting

b

Unit 7

Lubrication

2424

7. Lubrication

Lubrication is an effective and vital means for maintaining the life of your SANDEX unit.

Lubrication can minimize wear by reducing friction between rolling members, removing friction heat,

and preventing rust on rolling surface. The statistical life of the SANDEX unit is based on rolling

fatigue. However, these statistics are valid only when wear, vibration, and mechanical seizure are kept

at a minimum.

Improper lubrication over any of these areas can cause frictional wear in a very short time.

On the other hand, proper lubrication using incorrect grades of lubricating oils, such as low viscosity

oil, can cause temperature rises and lower the dynamic viscosity of the lubricant. This means that the

minimum dynamic viscosity necessary for forming an oil film cannot be obtained, thereby allowing the

two surfaces to directly come into contact and cause frictional wear.

It is vitally important that proper lubrication procedures be implemented according to actual

operating conditions.

4.5 Purpose of lubrication

(a) To prevent friction between pure slipping members.

(b) To prevent abrasion by forming an oil film between two surfaces, thereby inhibiting

direct contact between both surfaces.

(c) To extend the fatigue life of the material by introducing boundary based on oil film

formation, thereby relieving Hertz stress.

(d) To prevent local temperature rises by transmitting and removing friction heat.

(e) To prevent dirt and other foreign particles from entering the housing.

(f) To prevent rust by using the oil film to keep the surface from direct exposure to the

atmosphere.

7.2 Oil selection precautions

(1) Lubrication is a vital factor to ensure maximum performance from your unit. The

selection of lubricating oils is equally important. Improperly selected oils can lower

the precision of the unit, and reduce its operating life. When selecting an oil, always

give full consideration to actual operating conditions.

(2) When selecting oils, choose good quality gear oil with pressure additives, a strong

oil coating quality, rust inhibiting properties, and steady oxidation. (A pressure

additive is a specially formulated chemical composition that improves lubrication

performance.)

(3) Never mix oils of different manufacturers even if they are used for the same purpose.

This is because each manufacturer may use pressure additives with different

compositions.

Unit 7

Lubrication

2525

(4) Viscosities differ according to the operating speed and size of the indexing drive

involved. Choose the proper viscosity from the following table.

(5) The viscosity you choose should also meet the ambient temperature requirements of

your SANDEX unit. The following table gives the viscosity for a standard

temperature range from 0 to 40 degrees Celsius(32  104°F). Consult Sankyo for

usage outside of this range.

7.3 Lubricating oil viscosity’s

INPUT SHAFT

ROTATING

SPEED (rpm) 0~20 20~100 100~200 200~300 300~400 400~600 600~

VISCOSITY

(cSt/40°) 680 460 320 220 220 150 150

Note

If your operating speed falls between two viscosity grades, use the higher viscosity grade.

7.4 Recommended lubricating oil

LUBRICATING OIL LEVELS

VISCOSITY

(cSt/40°) Esso Standard Oil Shell Oil Mobil Oil

>680 Spartan EP680 Shell Omala Oil 680 Mobil Gear 636

680~460 Spartan EP480 Shell Omala Oil 460 Mobil Gear 636-633

460~320 Spartan EP320 Shell Omala Oil 320 Mobil Gear 632

320~220 Spartan EP220 Shell Omala Oil 220 Mobil Gear 630

220~150 Spartan EP150 Shell Omala Oil 150 Mobil Gear 629

150~68 Spartan EP68 Shell Omala Oil 68 Mobil Gear 626

Unit 8

Filling and replacing lubricating oil

2626

8. Filling and replacing lubricating oil

Lubrication is a crucial factor for maintaining the operating life of your SANDEX unit.

These units feature a high level of precision, and a resistance to friction. However, improper

lubrication can reduce the life of the unit. When filling the unit with oil, make sure to prevent foreign

particles such as drilling chips, dust, or water from entering the unit.

Before filling with new oil, clean the area around the oil filling port. Also, always use clean fresh oil.

8.1 Refilling lubricating oils

(1) To add lubricating oil, remove the oil fill plug. (On standard drives, this plug is a

hexagonal PT plug and has a small air-bleeding hole in it.) Allow sufficient time for

the oil to settle in the housing for an accurate filling.

(2) On standard SANDEX units, the oil fill level and drain plugs are designed so not to

protrude from the mounting plane. However, operation at high speeds may cause oil

to spurt from the air-bleeding hole in the plug. Also, it may be difficult to refill and

drain oil if a table is mounted on the output shaft.

8.2 Oil replacement schedule

First time  After 1000 hours of operation

Thereafter  Every 3000 hours of operation

Note

For use under the above hours, replace once every year.

Unit 9

Lubricating greases

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9. Lubrication greases

SANDEX units use an oil bath lubricating system. In certain mounting positions, the bearings sit

above the oil level. In this case, a sealed lubricating device is installed exclusively for the bearings and

grease nipples are attached wherever grease must be reapplied. Note, your SANDEX has already been

greased prior to initial operation. Apply grease every 2000 to 4000 hours of operation.

9.1 Supplying lubricating grease

(1) If the mounting position of the Alpha index output flange is horizontal, parallel to

the ground, grease needs to be applied to the bearing by the grease fitting supplied

on the output stationary flange.

(2) Supply 5 to 30 g per shot according to the SANDEX model you are using. Old

grease will fall into the oil basin and will be drained when the lubricating oil is

replaced.

Recommended lubricating greases

MAKER LUBRICATING GREASE LABELS

Esso Standard Oil Beacon 2, Q2 ; Lystan 2, EP2

Shell Oil Alvania 2, EP2

Mobil Oil Mobilax Grease 2, EP2

Grease nipples

Unit 11

Repairs and maintenance

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10. Repairs and maintenance

One of the advantages of the SANDEX unit is that it is easy to handle. However, improper use can affect

the life and performance of your SANDEX unit. The following items explain basic repair and maintenance

procedures.

(1) Periodically, check for backlash in the input and / or output systems. Backlash that goes

unnoticed may develop even further over the years. Check for red rust as this indicates the

occurrence of fretting corrosion. Re-tighten any locations where red rust appears.

(2) Running your SANDEX unit without oil will cause internal damages. Note, overfilling can

be the cause of abnormal temperature rises and oil leaks.

(3) Replace lubricating oils every 3000 operating hours. Note, for operating hours less than

this, replace the oil once every year.

(4) Supply lubricating grease every 2000 to 4000 operating hours. For 23AD,

supply a shot of 20 to 30 g. For smaller models, supply approximately 5 to 10 g.

(5) The Sigma II driver is supplied with a Toshiba, ER3 V, 3.6V, 1000mAH battery.

The driver is also equipped with a battery light. This light should be checked

as a general maintenance item, and when illuminated the battery will need

replaced.

Unit 11

Repairs and maintenance

2929

10.1 Yaskawa Driver and Controllerdisplay codes

Display Value Description

A.- Normal Operation

A.02 Parameter Breakdown

A.03 Main Circuit Encoder Error

A.04 Parameter Setting Error

A.05 Servomotor and Amplifier Combination Error

A.10 Overcurrent or Hat Sink Overheated

A.30 Regeneration Error Detected

A.32 Regenerative Overload

A.40 Overvoltage

A.41 Undervoltage

A.51 Overspeed

A.71 Overload: High Load

A.72 Overload: Low Load

A.73 Dynamic Break Overload

A.74 Overload of Surge Current Limit Resistor

A.7A Heat Sink Overheated

A.81 Absolute Encoder Backup Error

A.82 Encoder Checksum Error

A.83 Absolute Encoder Battery Error

A.84 Absolute Encoder Data Error

A.85 Absolute Encoder Overspeed

A.86 Encoder Overheated

A.b1 Reference Speed Input Read Error

A.b2 Reference Torque Input Read Error

A.Bf System Alarm

A.C1 Servo Overrun Detected

A.C8 Absolute Encoder Clear Error and Multiturn

Limit Setting Error

A.C9 Encoder Communications Error

A.CA Encoder Parameter Error

If any of these errors occur

please contact:

Sankyo America Inc.

(937) 498-4901

Unit 11

Repairs and maintenance

3030

A.Cb Encoder Echoback Error

A.CC Multiturn Limit Disagreement

A.d0 Position Error Pulse Overflow

A.F1 Power Line Open Phase

CPF00 Digital Operator Transmission Error

CPF01 Digital Operator Transmission Error

A.91 Overload Warning

A.92 Regenerative Overload Warning

A.E? Option Board Error

If any of these errors occur

please contact:

Sankyo America Inc.

(937) 498-4901

Unit 11

Repairs and maintenance

3131

10.2 Troubleshooting procedures (1)

NATURE OF PROBLEM ASSUMED CAUSE CORRECTION

BACKLASH IN OUTPUT SHAFT

Small amount along perimeter

of cam Insufficient preload between cam

and cam follower Adjust eccentric flange on input shaft

Large amount on certain

part(s) of cam Cam flaking Replace cams, reduce load on output

shaft

Large amount on certain

part(s) of turret Cam follower flaking Replace turret, reduce load on output

shaft

Large amount at one place on

turret Crack in outer diameter of cam

follower Replace turret, attach torque limiter on

output shaft

Large amount at one place on

turret Damaged cam follower Replace turret, attach torque limiter to

output shaft

Changes every index Eccentric wear on outer diameter

of cam follower Replace turret, increase oil viscosity by

one grade

PLAY IN OUTPUT SHAFT

Play in thrust direction only Loose output flange Apply loctite to screw threads and

re-tighten

Play in thrust and radial

directions Worn bearings Check sealing device and lubrication

Play in thrust and radial

directions Loose tightening nut Tighten nut, review load in thrust

direction

Play in thrust and radial

directions Creep wear on shaft Enlarge tightening length, review

ambient temperatures

PLAY IN INPUT SHAFT

Play in thrust direction only Insufficient preload on bearings Tighten flange on inside of eccentric

flange

Play in thrust and radial

directions Bearing has gap in thrust direction Tighten flange on inside of eccentric

flange

Play in thrust and radial

directions Worn bearings Improve lubrication sealing device

Play in thrust and radial

directions Creep wear on shaft Enlarge tightening length, review

ambient temperatures

NOISE

Loud noises, continuous Noise from lip section of oil seal Supply lubricant, replace sealing device

Loud continuous noise caused

by vibration. Noise from entire unit Check Servo Tuning section in Yaskawa

Drive manual, of contact Sankyo

America for assistance.

Loud noises, intermittent Roughly machined cam track

surface Correct cam, increase viscosity of

lubricating oil

Loud noise, intermittent Rotating components touch each

other Check mounted component

Low noise, continuous Worn input shaft bearings Replace bearings, check lubrication

Low noise, intermittent Cam flaking Replace cams, reduce load on output

shaft

Low noise, intermittent Cam follower flaking Replace turret, reduce load on output

shaft

Low noise, Intermittent Loose rotating components Check tightening section of mounted

components

Unit 11

Repairs and maintenance

3232

10.3 Troubleshooting procedures (2)

NATURE OF PROBLEM ASSUMED CAUSE CORRECTION

VIBRATION

Output rotating section Backlash, torsion, deflection in

input system Check input drive system

Output rotating section Loose linkage in input system Change linkage elements, tighten bolts

Output rotating section Rotation lag in input system Change rotation transmission component

Output rotating section Insufficient motor power Increase motor power rating

Output rotating section Clutchbrake timing Adjust timing cam

Output rotating section Cam flaking Replace cam, reduce load on output shaft

Input rotating section Rotating components are

physically unbalanced Balance components

Input rotating section Rotating components are eccentric Align centers

Residual vibration Insufficient torsional rigidity in

output system Increase rigidity of output system

Residual vibration Momentum in output system is too

intense Select a larger indexing drive model

Overall Frame deformity Increase rigidity of mounting base

TEMPERATURE RISE

Entire housing Heat caused by agitation Check lubrication oil level and viscosity

Bearing burnout Rotating speed too high Adjust eccentric flange

Cam, cam follower burnout Too much preload Check lubrication

Bearing burnout Insufficient lubrication Check lubrication

OIL LEAKAGE

Input/output shaft Broken sealing device Replace sealing device, install dust cover

Flange surface Broken O-ring Replace parts

Oil plug Lubricating oil splashes Change oil plug part number

Mounting hole surface Starting hole for tapping goes all

the way through Apply sealant to mounting

BROKEN SHAFT

Input shaft Damage due to material fatigue Reduce overhanging load

Output shaft Shock load Install torque limiter on output shaft

Key shaft Fretting corrosion Change friction linkage

Rust Ambicient conditions Apply rust inhibitor or paint surface

10655 State Route 47, P.O. Box 4338

Sidney, Ohio 45365-4338

Telephone: (937) 498-4901

Fax: (937) 498-9403

E-mail: sales@sankyoamerica.com

Web Site: http://www.sankyoamerica.com