ACE&EASTMAN Rh 9820 Service Manual 9820SM_Cover1E User

2016-10-16

User Manual: ACE&EASTMAN Rh-9820 Service Manual

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SAFETY INSTRUCTIONS
1. MACHINE SPECIFICATIONS
2. FUNCTION SETTINGS
3. READING/WRITING DATA
4. MECHANICAL DESCRIPTIONS
5. DISASSEMBLY
6. ASSEMBLY
7. ADJUSTMENTS
8. ELECTRICAL MECHANISM
9. ERROR CODES
10. TROUBLESHOOTING

RH-9820

Please read this manual before making any adjustments.

ELECTRONIC EYELET BUTTON HOLER

SERVICE MANUAL

RH-9820

This service manual is intended for RH-9820; be sure to read the RH-9820 instruction manual before

this manual.

Carefully read the “SAFETY INSTRUCTIONS” and the whole of this manual to understand this product

before you start maintenance.

As a result of research and improvements regarding this product, some details of this manual may not

be the same as those for the product you purchased.

If you have any questions regarding this product, please contact a Brother dealer.

RH-9820 i

SAFETY INSTRUCTIONS

[1] Safety indications and their meanings

This service manual and the indications and symbols that are used on the machine itself are provided in order to ensure safe

operation of this machine and to prevent accidents and injury to yourself or other people.

The meanings of these indications and symbols are given below.

Indications

DANGER The instructions which follow this term indicate situations where failure to follow

the instructions will result in death or serious injury.

CAUTION The instructions which follow this term indicate situations where failure to follow

the instructions could cause injury when using the machine or physical damage

to equipment and surroundings.

Symbols

..……… This symbol ( ) indicates something that you should be careful of. The picture inside the triangle

indicates the nature of the caution that must be taken.

(For example, the symbol at left means “beware of injury”.)

..……… This symbol ( ) indicates something that you must not do.

..……… This symbol ( ) indicates something that you must do. The picture inside the circle indicates the

nature of the thing that must be done.

(For example, the symbol at left means “you must make the ground connection”.)

RH-9820

[2] Notes on safety

DANGER

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet

before opening the cover of the control box. Touching areas where high voltages are present can result in severe

injury.

CAUTION

Environmental requirements

Use the sewing machine in an area which is free

from sources of strong electrical noise such as

electrical line noise or static electric noise.

Sources of strong electrical noise may cause

problems with correct operation.

Any fluctuations in the power supply voltage should

be within ±10% of the rated voltage for the machine.

Voltage fluctuations which are greater than this may

cause problems with correct operation.

The power supply capacity should be greater than

the requirements for the sewing machine's power

consumption.

Insufficient power supply capacity may cause

problems with correct operation.

The pneumatic delivery capability should be greater

than the requirements for the sewing machine's total

air consumption.

Insufficient pneumatic delivery capability may cause

problems with correct operation.

The ambient temperature should be within the range

of 5°C to 35°C during use.

Temperatures which are lower or higher than this

may cause problems with correct operation.

The relative humidity should be within the range of

45% to 85% during use, and no dew formation

should occur in any devices.

Excessively dry or humid environments and dew

formation may cause problems with correct

operation.

In the event of an electrical storm, turn off the power

and disconnect the power cord from the wall outlet.

Lightning may cause problems with correct

operation.

Installation

Machine installation should only be carried out by a

qualified technician.

Contact your Brother dealer or a qualified electrician

for any electrical work that may need to be done.

The sewing machine weighs approximately 120 kg.

Installation of the sewing machine and adjustment of

the table height should be carried out by four or

more people.

Do not connect the power cord until installation is

complete. If this is not done, the sewing machine

may operate if the start switch is pressed by mistake,

which could result in serious injury.

Hold the machine head with both hands when tilting

it back or returning it to its original position.

In addition, do not subject the machine head to extra

force while it is tilted back.

If this is not observed, the machine head may

become unbalanced and fall over (together with the

table), and serious injury or damage to the sewing

machine may result.

Be sure to connect the ground. If the ground

connection is not secure, you run a high risk of

receiving a serious electric shock, and problems with

correct operation may also occur.

All cords should be secured at least 25 mm away

from any moving parts. Furthermore, do not

excessively bend the cords or secure them too firmly

with staples.

If this is not observed, fire or electric shocks may

result.

Install belt covers to the machine head.

If using a work table which has casters, the casters

should be secured in such a way so that they cannot

move.

Be sure to wear protective goggles and gloves when

handling the lubricating oil, so that it does not get

into your eyes or onto your skin.

If care is not taken, inflammation can result.

Furthermore, do not drink the lubricating oil. Diarrhea

or vomiting may result.

Keep the oil out of the reach of children.

RH-9820 iii

CAUTION

Sewing

This sewing machine should only be used by

operators who have received the necessary training

in safe use beforehand.

The sewing machine should not be used for any

applications other than sewing.

Be sure to wear protective goggles when using the

machine.

If goggles are not worn, there is the danger that if a

needle breaks, parts of the broken needle may enter

your eyes and injury may result.

Turn off the power switch at the following times. If

this is not done, the sewing machine may operate if

the start switch is pressed by mistake, which could

result in serious injury.

• When threading the needle

• When replacing the needle

• When not using the machine and when leaving the

machine unattended

If using a work table which has casters, the casters

should be secured in such a way so that they cannot

move.

Attach all safety devices before using the sewing

machine. If the machine is used without these

devices attached, injury may result.

Do not touch any of the moving parts or press any

objects against the machine while sewing, as this

may result in personal injury or damage to the

machine.

If an error occurs in machine operation, or if

abnormal noises or smells are noticed, immediately

turn off the power switch. Then contact your nearest

Brother dealer or a qualified technician.

If the machine develops a problem, contact your

nearest Brother dealer or a qualified technician.

Cleaning

Turn off the power switch before carrying out this

operation. If this is not done, the sewing machine

may operate if the start switch is pressed by mistake,

which could result in serious injury.

Be sure to wear protective goggles and gloves when

handling the lubricating oil, so that it does not get into

your eyes or onto your skin.

If care is not taken, inflammation can result.

Furthermore, do not drink the lubricating oil. Diarrhea

or vomiting may result.

Keep the oil out of the reach of children.

Maintenance and inspection

Disassembly, assembly, maintenance and inspection

of the sewing machine should only be carried out by

a qualified technician.

Ask your Brother dealer or a qualified electrician to

carry out any maintenance and inspection of the

electrical system.

Turn off the power switch and disconnect the power

cord at the following times. If this is not done, the

sewing machine may operate if the start switch is

pressed by mistake, which could result in serious

injury.

• When carrying out inspection, adjustment and

maintenance

• When replacing consumable parts such as the

loopers and knife

Turn off the power switch before inserting or

removing the plug, otherwise damage to the control

box could result.

Disconnect the air hoses from the air supply and wait

for the needle on the pressure gauge to drop to “0”

before carrying out inspection, adjustment and repair

of any parts which use the pneumatic equipment.

If the power switch and air need to be left on when

carrying out some adjustment, be extremely careful

to observe all safety precautions.

Hold the machine head with both hands when tilting

it back or returning it to its original position.

In addition, do not subject the machine head to extra

force while it is tilted back.

If this is not observed, the machine head may

become unbalanced and fall over (together with the

table), and serious injury or damage to the sewing

machine may result.

Be sure to wear protective goggles and gloves when

handling the lubricating oil and grease, so that they

do not get into your eyes or onto your skin, otherwise

inflammation can result.

Furthermore, do not drink the oil or eat the grease

under any circumstances, as they can cause

vomiting and diarrhea.

Keep the oil out of the reach of children.

Use only the proper replacement parts as specified

by Brother.

If any safety devices have been removed, be

absolutely sure to re-install them to their original

positions and check that they operate correctly

before using the machine.

Any problems in machine operation which result

from unauthorized modifications to the machine will

not be covered by the warranty.

RH-9820

[3] Warning labels

The following warning labels appear on the sewing machine.

Please follow the instructions on the labels at all times when using the machine. If the labels have been

removed or are difficult to read, please contact your nearest Brother dealer.

1 2

3 Do not touch the knife or press any

objects against the machine while

sewing, as this may result in personal

injury or damage to the machine.

Safety devices

Devices such as eye guard, finger guard,

needle bar guard, needle guide cover and

belt cover

Be careful not to get your hands

caught when returning the machine

head to its original position after it

has been tilted.

5 Be careful not to get your hands caught

when moving the feed base backward.

6 Be sure to connect the ground. If the

ground connection is not secure, you

run a high risk of receiving a serious

electric shock, and problems with

correct operation may also occur.

7 Direction of operation

8 High temperature warning display

Eye guard

Finger guard

Needle guide cove

Needle bar guard

0534B

0330B

0302B

RH-9820 v

Belt cover

(Rear)

0331B

0332B

0334B

0486B

0485B

0333B

RH-9820

CONTENTS

1. MACHINE SPECIFICATIONS....... 1

2. FUNCTION SETTINGS ................. 2

2-1. List of special functions when power is turned on...............2

2-2. List of advanced functions..................................................... 3

2-3. Memory switch setting method (Advanced)........................4

2-4. List of memory switch settings..............................................5

2-5. Error history checking method............................................14

2-6. Input checking method ........................................................15

2-7. Output checking method .....................................................18

2-8. Software version checking method....................................21

3. READING/WRITING DATA ........ 22

3-1. Precautions when handling CF cards (commercially

available).............................................................................22

3-2. Structure of a CF card folder...............................................22

3-3. Data read/write mode ..........................................................23

3-4. Reading parameter data from the CF card .......................24

3-5. Writing parameter data to the CF card ..............................24

3-6. Reading memory switch data from the CF card...............24

3-7. Writing memory switch data to CF cards...........................24

3-8. Writing error log data to the CF card ..................................25

3-9. Updating the main control program....................................25

3-10. Updating the panel control program ................................25

4. MECHANICAL DESCRIPTIONS .. 26

4-1. Upper shaft and Needle bar mechanisms.........................26

4-2. Zigzag and thread take-up mechanisms ...........................27

4-3. Needle bar rocking mechanism..........................................28

4-4. Feed mechanism .................................................................29

4-5. Presser foot mechanism .....................................................30

4-6. Cloth opening mechanism ..................................................31

4-7. Cutter mechanism................................................................32

4-8. Looper mechanism..............................................................32

4-9. Spreader mechanism..........................................................33

4-10. Upper thread trimmer mechanism ...................................33

4-11. Upper tension release mechanism..................................34

4-12. Upper thread take-up mechanism ...................................34

4-13. Lower thread release and lower thread take-up

mechanisms.......................................................................35

4-14. Gimp thread take-up mechanism

<-01 specifications only>...................................................35

4-15. Lower thread trimmer mechanism ...................................36

5. DISASSEMBLY........................... 38

5-1. Covers and presser foot mechanism.................................39

5-2. Upper shaft motor unit mechanism....................................40

5-3. Feed mechanism................................................................. 41

5-3-1. Feed base unit ..........................................................41

5-3-2. X feed unit..................................................................42

5-3-3. Y feed unit..................................................................42

5-4. Lower thread tension mechanism...................................... 43

5-5. Spreader mechanism..........................................................44

5-6. Looper mechanism.............................................................. 45

5-7. Needle bar rocking mechanism .........................................46

5-8. Looper base mechanism ....................................................47

5-9. Needle bar mechanism....................................................... 48

5-10. Lubrication .......................................................................... 49

5-11. Zigzag and thread take-up mechanisms......................... 51

5-12. Upper shaft mechanism.................................................... 52

5-13. Cutter mechanism .............................................................53

6. ASSEMBLY................................. 54

6-1. Cutter mechanism ............................................................... 55

6-2. Needle bar mechanism (1) .................................................57

6-3. Zigzag mechanism .............................................................. 59

6-4. Upper shaft mechanism...................................................... 61

6-5. Thread take-up mechanism................................................ 64

6-6. Needle bar mechanism (2) .................................................65

6-7. Y feed mechanism............................................................... 69

6-8. Looper base mechanism ....................................................73

6-9. Needle bar rocking mechanism .........................................79

6-10. Lower shaft mechanism.................................................... 85

6-11. Looper mechanism ........................................................... 90

6-12. Spreader mechanism........................................................92

6-13. Upper thread trimmer mechanism................................... 94

6-14. Threading mechanism ......................................................95

6-15. Feed base mechanism .....................................................97

6-15-1. Feed base .............................................................97

6-15-2. X feed shaft holder.............................................104

6-16. X feed mechanism ..........................................................107

6-17. Lower thread tension mechanism..................................109

6-18. Upper shaft motor mechanism.......................................111

6-19. Covers ..............................................................................115

6-20. Work clamp plate mechanism........................................117

6-21. Lower thread trimming mechanism ...............................121

6-22. Upper cover mechanism (upper thread tension release

and upper thread take-up mechanisms

and upper thread path)........................................................... 127

RH-9820

6-22. Routing the harnesses ....................................................129

6-23. Routing the air tubes........................................................131

《Solenoid valve tubes and functions》........................133

6-24. Lubrication and greasing and routing the oil tubes.......135

7. ADJUSTMENTS......................... 141

7-1. Adjusting the heights of the spreaders and loopers .......141

7-2. Adjusting the zigzag width (stitch width) ..........................142

7-3. Adjusting the zigzag base line position ............................143

7-4. Adjusting the needle and looper timing............................146

7-5. Adjusting the looper stroke................................................147

7-6. Adjusting the height of the needle bar..............................148

7-7. Adjusting the clearance between the loopers and

needle ...............................................................................149

7-8. Adjusting the needle guard ...............................................149

7-9. Adjusting the spreader installation positions....................150

7-10. Adjusting the spreader timing .........................................151

7-11. Adjusting the height of the throat plate...........................152

7-12. Changing the cutting length (Replacing the hammer) .153

7-13. Adjusting the cutting surface of the hammer.................154

7-13-1. Filing the cutting surface of the hammer ..........154

7-13-2. Adjusting the contact between the knife and the

hammer...............................................................155

7-14. Adjusting the axial play of the hammer..........................155

7-15. Making the cutter driving shaft and driving shaft presser

move together ..................................................................156

7-16. Replacing the knife and adjusting its position ...............157

7-16-1. Replacing the knife.............................................157

7-16-2. Making fine adjustments to the knife position....158

7-17. Adjusting the cutting pressure ........................................160

7-18. Adjusting the work clamp lift amounts ...........................161

7-19. Adjusting the work clamp positions ................................162

7-20. Adjusting the positions of the work clamp plates ..........163

7-21. Adjusting the cloth opening amounts.............................164

7-22. Adjusting the upper thread feeding amount ..................165

7-23. Adjusting the lower thread feeding amount

<-01 specifications only>.................................................166

7-24. Replacing and adjusting the upper movable knife........166

7-24-1. Replacing the upper movable knife...................166

7-24-2. Adjusting the upper movable knife....................167

7-24-3. Adjusting the position of the thread trimmer lever

bracket .................................................................168

7-25. Replacing and adjusting the movable knife and fixed

knife (for the lower thread and gimp)

<-01 specifications>.........................................................169

7-25-1. Replacing the movable knife and fixed knife....169

7-25-2. Adjusting the cutting pressure ...........................170

7-25-3. Adjusting the meshing amount..........................170

7-25-4. Adjusting the thread nipper assembly and

opener..................................................................171

7-25-5. Adjusting the thread handler..............................173

7-26. Replacing and adjusting the movable knife and fixed

knife (for the lower thread and gimp)

<-02 specifications>.........................................................174

7-26-1. Replacing the movable knife and fixed knife ...174

7-26-2. Adjusting the cutting pressure...........................174

7-26-3. Adjusting the movable knife

installation position..............................................175

7-26-4. Adjusting the position of the sub clamp ...........176

7-26-5. Differences from older models .........................177

7-27. Adjusting the gimp trailing length

<-02 specifications only> ................................................179

7-28. Adjusting the position of the lower thread presser

<-02 specifications only> ................................................180

7-29. Adjustment of the phase for the take-up roller cam......181

7-30. Adjusting the needle bar and looper base turning

center ................................................................................182

7-31. Adjusting the upper thread loosening amount ..............183

7-32. Adjusting the lower thread loosening amount...............184

7-33. Adjusting the looper base home position ......................185

7-34. Adjusting the feed base X home position and Y home

position..............................................................................187

7-35. Adjusting the needle up signal home position for the

upper shaft and upper shaft motor.................................189

7-36. Adjusting the upper shaft stop position..........................191

7-37. Installing (replacing) the sub clamp on the left side......192

8. ELECTRICAL MECHANISM......197

8-1. Precautions while carrying out adjustments....................197

8-2. Inside the control box and operation panel structure .....198

8-3. Description of fuses ...........................................................199

8-4. Description of connectors..................................................200

8-4-1. Connector positions................................................200

8-4-2. Symptoms when there are poor connections......203

8-5. Troubleshooting .................................................................206

8-5-1. Troubleshooting procedure...................................206

8-5-2. Diagnosis flowchart................................................207

8-5-3. Remedy ..................................................................210

9. ERROR CODES.........................219

10. TROUBLESHOOTING .............225

RH-9820

1. MACHINE SPECIFICATIONS

Lower thread trimmer

Thread trimmer Long type Short type

-00 O - -

-01 O O -

-02*1 O - O

*1: -02 specifications are divided into L1422 to L3422 specifications

depending on the sewing lengths, so please specify the sewing

length when ordering.

*2: This is not covered by specification designations, but compatibility

is possible by replacement of gauge parts. (Ask the place of

purchase for details.)

SPECIFICATIONS RH-9820-00 RH-9820-01 RH-9820-02

Use Men’s clothes, ladies’ clothes Jeans and work clothes

Sewing speed 1,000 - 2,500 rpm (Setting possible in units of 100 rpm)

Sewing shape

Without bartack

Taper bartack

Straight bartack

Round bartack

Circular stitch

Without bartack

Taper bartack

Straight bartack

Round bartack

Circular stitch

Without bartack

Taper bartack

Straight bartack

Round bartack

Sewing length Eyelet buttonholes：8 - 50mm

Straight buttonholes：5 - 50 mm

Eyelet buttonholes：8 - 42mm

Straight buttonholes：5 - 42 mm

L1422: 14 - 22 mm *2

L1826: 18 - 26 mm

L2230: 22 - 30 mm

L2634: 26 - 34 mm *2

L3442: 34 - 42 mm *2

Stitch pitch 0.5 - 2.0 mm

Zigzag width 1.5 - 5.0 mm (Max. 4.0 mm with mechanism, Max. 1.0 mm with software)

Taper bartack length 0 - 20 mm

Work clamp height Standard 12 mm (up to 16 mm possible) 16 mm

Starting method Foot switch (treadle type, 2-pedal type) or hand start switch

Feed mechanism Intermittent feed by three pulse motors (X, Y, θ)

Needle DO x 558 80 - 120 Nm (Schmetz 558)

Safety devices Built-in emergency stop function and automatic stopping device which stops the machine when the

safety circuit is activated

Upper shaft motor AC servo motor (4-pole, 550 W)

Air pressure Main regulator: 0.5 MPa

Hammer pressure regulator: 0.4 MPa

Air consumption 43.2 l/min (8 cycles/min)

Power supply Single-phase 100V/220V, Three-phase 200V/220V/380V/400V 400 VA

Weight Machine head: Approx. 120 kg, Operation panel: Approx. 0.6 kg

Control box: 14.2 - 16.2 kg (Varies depending on destination)

2. FUNCTION SETTINGS

RH-9820

2. FUNCTION SETTINGS

2-1. List of special functions when power is turned on

This section contains a list of functions and the key operations which are used to call the setting mode for the functions.

Push the power switch at the ON side

to turn on the power.

1 Memory switch setting mode (Standard)

Refer to the Instruction manual.

6 Output checking function

Refer to “2-7. Output checking method”.

2 Memory switch setting mode (Advanced)

Refer to “2-3. Memory switch setting method (Advanced)”.

7 Software version display function

Refer to “2-8. Software version checking method”.

3 Data initialization function

Refer to the Instruction manual.

8 Data read/write mode

Refer to “3-3. Data read/write mode”.

4 Error log display function

Refer to “2-5. Error history checking method”.

9 Home position adjustment mode

Refer to “7-33. Adjusting the looper base home position”

“7-34. Adjusting the feed base X home position and Y

home position”.

5 Input checking function

Refer to “2-6. Input checking method”.

10 Upper shaft stop position adjustment mode

Refer to “7-36. Adjusting the upper shaft stop position”.

4421Q

5056Q

0676B - 0680B 0681B - 0685B

2. FUNCTION SETTINGS

3 RH-9820

2-2. List of advanced functions

This section contains a list of advanced functions and the key operations which are used to call the setting mode for the

functions.

1 Production counter setting mode

Refer to the Instruction manual.

Data read/write mode

Refer to “3-3. Data read/write mode”.

4550Q

0708B 0709B

2. FUNCTION SETTINGS

RH-9820

2-3. Memory switch setting method (Advanced)

The settings for the memory switches are valid for all programs.

1 While pressing the TEST key and the PROGRAM key, push the POWER switch at the ON side (1).

* The mode will switch to memory switch mode.

* The memory switch number (A) will appear in the top part of

the display, and the setting (B) for that number will appear in

the bottom part of the display.

2 Select the number (A) for the memory switch that you would like to change the setting for.

* If you press and hold the F key while pressing the or key at this

time, only the memory switches whose current setting values are

different from the default values will appear.

3 Change the memory switch setting (B).

* If you would like to return the setting which is currently being displayed

to the default value, press the RESET key.

* If the memory switch setting is different from the original setting, the

display will flash.

4 Apply the changed setting.

The setting for the memory switch will be stored and (B) will stop flashing

and illuminate steadily.

NOTE:

The changed settings will be enabled after memory switch mode has been

exited.

5 Repeat steps 2 to 4 above to change other memory switch settings.

6 [To exit memory switch mode]

Normal sewing machine operation will then be possible.

(A)

0413B

0322B

0323B

0414B

0415B

0448B

(B)

0598B

(B)

2. FUNCTION SETTINGS

5 RH-9820

2-4. List of memory switch settings

Memory switches which have a “*” in the default value column (050, 752, 850, 851, 852 and 853) are ignored when memory

switch initialization is carried out.

The settings for these memory switches are only changed when the ENTER key is pressed in memory switch mode.

For operator

No. Setting

range Setting items Default

value

Switching between 1-pedal and 2-pedal operation

* Displayed when using a hand start switch or 2-pedal foot switch

1 When the start switch is pressed, the work clamp is lowered and the sewing machine

starts.

001

2 When the start switch is pressed, the work clamp is lowered.

After that, the sewing machine starts operating when the start switch is pressed.

F key assignment

OFF The Help screen is displayed while the F key is being pressed.

300

1 - 40 Operates as a 7th shortcut key.

* The numerals indicate the parameter numbers.

OFF

Parameter checking column (1) in automatic mode

1 Shows the sewing length.

301

2 Shows the sewing pitch.

Parameter checking column (2) in automatic mode

3 Shows the sewing speed.

302

4 Shows the number of stitches.

Display screen contrast

303 0 - 30 The higher the value, the greater the contrast. 15

Number of eyelet buttonholes when the fly indexer is used

* This is displayed when the fly indexer is enabled.

500

2 - 9 The number of eyelet buttonholes can be set.

* If the number of buttonholes is 5 or more, a cloth feed bar (sold separately) is required.

Fly setting position when the fly indexer is used

* This is displayed when the fly indexer is enabled.

1 The material (fly) setting position is always at the left edge.

After sewing is finished, the cloth feed bar returns to the left edge.

501

2 The material (fly) setting position repeatedly alternates between the left and right edges.

(2)

0222B

(1)

2. FUNCTION SETTINGS

RH-9820

Work clamp settings

No. Setting

range Setting items Default

value

Sewing machine starting procedure

* This is not overwritten by CF card data.

Hand start switch or 2-pedal foot switch

050

Treadle

Delay time for 1-pedal operation when cutting before sewing is set (ms)

* This is displayed when 1-pedal operation is being used.

051

0 - 800

When carrying out automatic sewing with cutting before sewing, the hammer operates

only after the set delay time has passed.

Setting can be carried out in units of 50 ms.

Work clamp operating position for treadle

* This is displayed when treadle operation is being used.

052

105 - 125 When a smaller value is set, the amount that the treadle is depressed to reach the work

clamp operating position becomes smaller.

115

Sewing machine starting position for treadle

* This is displayed when treadle operation is being used.

053

135 - 175 When a smaller value is set, the amount that the treadle is depressed to reach the

sewing machine starting position becomes smaller.

155

Work clamp raising operation position for treadle

* This is displayed when treadle operation is being used.

054

65 - 85 When a larger value is set, the amount that the treadle is depressed backward to reach

the work clamp raising operating position becomes smaller.

Work clamp operation standby for treadle

* This is displayed when treadle operation is being used.

OFF After the work clamp has been lowered, the work clamp is raised when the treadle is

moved to the neutral position.

055

After the work clamp has been lowered, the work clamp is held in the lowered position

even when the treadle is moved to the neutral position, and the work clamp is raised

when the treadle is depressed backward.

OFF

Work clamp down operation when feed base is forward

OFF When the feed base moves to the forward setting position after sewing is finished, the

work clamp moves while it is still raised.

056

When the feed base moves to the forward setting position after sewing is finished, the

work clamp moves while being lowered at the same time, and once the work clamp

finishes moving, it is raised.

OFF

Work clamp raising allowed during test feeding

OFF Raising of the work clamp is not allowed during test feeding.

057

The work clamp can be raised during test feeding when the following operations are

carried out.

(A) For hand start switch or 2-pedal foot switch operation: Press the work clamp switch.

(B) For treadle operation: Depress the treadle backward.

When test feeding is carried out again, the following operations must be carried out to

lower the work clamp.

(A) For hand start switch or 2-pedal foot switch operation: Press the work clamp switch.

(B) For treadle operation: Depress the treadle.

OFF

Work clamp operation after automatic sewing is finished

OFF After automatic sewing is finished, work clamp is raised.

058

After automatic sewing is finished, work clamp remains lowered.

To raise the work clamp, carry out the following operations.

(A) For hand start switch or 2-pedal foot switch operation: Press the work clamp switch.

(B) For treadle operation: Depress the treadle backward.

* When using the fly indexer, this function is disabled.

OFF

2. FUNCTION SETTINGS

7 RH-9820

Upper shaft control settings

No. Setting

range Setting items Default

value

Needle up stop when operation is paused

OFF Upper shaft stops immediately when sewing is paused.

150

ON Upper shaft stops at needle up stop position when sewing is paused.

Upper shaft speed correction (rpm)

151 -30 - 30 Correction can be carried out with respect to the setting speed.

Setting can be carried out in units of 10 rpm.

Upper shaft final stitch speed (rpm)

152 700 - 900 The speed for the final stitch can be set.

Setting can be carried out in units of 10 rpm.

800

Upper shaft speed immediately before stopping (rpm)

153 250 - 450 The speed immediately before stopping can be set.

Setting can be carried out in units of 10 rpm.

350

Current limit value during upper shaft acceleration

154 1 - 8 When a larger value is set, a larger amount of current flows during acceleration. 8

Current limit value during upper shaft deceleration

155 1 - 8 When a larger value is set, a larger amount of current flows during deceleration. 1

Upper shaft stopping distance (°)

156 2.5 - 17.5 When a larger value is set, the interval for stopping control becomes longer.

Setting can be carried out in units of 0.5°.

Brake release speed when upper shaft stops

157 1 - 5 When a larger value is set, the brake is released more quickly. 3

NOTE:

Do not change the settings for Nos. 151 - 157 unless specifically instructed to by the manufacturer.

2. FUNCTION SETTINGS

RH-9820

Feed control settings

No. Setting

range Setting items Default

value

Feed timing correction (°)

250 -20 - 20 When a smaller value is set, the feed timing is advanced.

Setting can be carried out in units of 2°.

Automatic upper shaft deceleration to emphasize feeding

OFF Normal

251

The proportional feed time for each stitch is reduced from normal in order to prevent

needle deflection.

* This may be limited by the sewing speed.

OFF

Y axis test feeding speed correction when feed base changes to forward setting (Hz)

252 -3500 - 0

When a smaller value is set, the test feeding speed in the Y axis direction becomes

slower.

Setting can be carried out in units of 100 Hz.

-2500

X axis test feeding speed correction (Hz)

253 -300 - 0

When a smaller value is set, the test feeding speed in the X axis direction becomes

slower.

Setting can be carried out in units of 50 Hz.

Y axis test feeding speed correction (Hz)

254 -2500 - 0*1

When a smaller value is set, the test feeding speed in the Y axis direction becomes

slower.

Setting can be carried out in units of 50 Hz.

θ axis test feeding speed correction (Hz)

255 -500 - 0

When a smaller value is set, the test feeding speed in the θ axis direction becomes

slower.

Setting can be carried out in units of 50 Hz.

Number of home position start cycles

OFF After sewing is finished, home position detection is not carried out.

256

1 - 9 Home position detection is carried out for the number of sewing cycles set.

OFF

X axis home position detection speed correction (ms)

257 0 - 2.0

When a larger value is set, the home position detection speed in the X axis direction

becomes slower.

Setting can be carried out in units of 0.1 ms.

Y axis home position detection speed correction (ms)

258 0 - 2.0

When a larger value is set, the home position detection speed in the Y axis direction

becomes slower.

Setting can be carried out in units of 0.1 ms.

θ axis home position detection speed correction (ms)

259 0 - 2.0

When a larger value is set, the home position detection speed in the θ axis direction

becomes slower.

Setting can be carried out in units of 0.1 ms.

*1… If the version of the main control program (MN) is 1.0.00, the range will be “-1000 to 0”.

2. FUNCTION SETTINGS

9 RH-9820

Panel operation settings

No. Setting

range Setting items Default

value

Disabling program mode

OFF Normal

350

ON Switching to program mode is disabled.

Shortcut keys are also disabled.

OFF

Disabling cycle program mode

OFF Normal

351

ON Switching to cycle program mode is disabled.

OFF

Disabling changing of production counter

OFF Normal

352

ON Changing the production counter is disabled.

OFF

Disabling changing of sewing speed

OFF Normal

353

ON Changing the sewing speed (parameter No. 01) is disabled.

OFF

Disabling changing of program number

OFF Normal

354

ON Changing the program number is disabled.

* However, the steps in cycle programs can be changed.

OFF

Disabling changing to cutting before sewing

OFF Normal

355

Changing to cutting before sewing is disabled.

* If cutting before sewing is the current setting before this is changed, the setting will

change automatically to no cutting.

OFF

Disabling changing to cutting after sewing

OFF Normal

356

Changing to cutting after sewing is disabled.

* If cutting after sewing is the current setting before this is changed, the setting will

change automatically to no cutting.

OFF

User program settings

No. Setting

range Setting items Default

value

Maximum sewing speed (rpm)

450 1000 - 2500 A limit to the maximum sewing speed can be set.

Setting can be carried out in units of 100 rpm.

2500

Maximum number of cycle programs

451 0 - 9 The number of effective cycle programs can be set.

* If cycle programs are never used, it can be useful to set this to 0.

Production counter when using cycle programs

OFF The counter is updated each time a buttonhole is sewn.

452

ON The counter is updated each time a single cycle is completed.

OFF

Maximum cutting space (mm)

453 0.5 - 0.8

This sets the maximum value for the cutting space.

* If setting this to 0.8 mm, adjust so that the needle plate and the throat plate do not

interfere with each other. (Refer to “7-20. Adjusting the positions of the work clamp

plates”.)

0.5

Maximum straight bartack length (mm)

454 6 - 9

This sets the maximum straight bartack length.

* If setting this to 9 mm, adjust so that the needle plate and the throat plate do not

interfere with each other. (Refer to “7-20. Adjusting the positions of the work clamp

plates”.)

Additional zigzag width when no cutting is set (mm)

455 0 - 1.0

When sewing using no cutting, the value set here is added automatically to the zigzag

width.

Setting can be carried out in units of 0.1 mm.

2. FUNCTION SETTINGS

RH-9820

Device settings

No. Setting

range Setting items Default

value

Hammer on time (ms)

550 25 - 200

When a larger value is set, the period of contact between the hammer and the knife

becomes longer.

Setting can be carried out in units of 5 ms.

Note: If this is set to a larger value than necessary, it will shorten the useful life of

the hammer and the knife.

Hammer home position recognition height

551 150 - 170

In the standby condition, an error (E650) will occur if the value which is read by the

hammer position sensor is less than this value.

* This setting is enabled when hammer home position error checking is enabled.

160

Hammer home position error checking

OFF Hammer home position error checking disabled

* This is used when there is a problem with the hammer position sensor.

552

ON Hammer home position error checking enabled

Verification of hammer raised position using timer (ms)

OFF Verification of the hammer raised position is carried out based on the hammer position

sensor.

553

50 - 500

Verification of the hammer raised position is carried out based on the timer.

Setting can be carried out in units of 50 ms.

* This is used when there is a problem with the hammer position sensor.

OFF

Verification of hammer lowered position using timer (ms)

OFF Verification of the hammer lowered position is carried out based on the hammer position

sensor.

554

100 - 500

Verification of the hammer lowered position is carried out based on the timer.

Setting can be carried out in units of 100 ms.

* This is used when there is a problem with the hammer position sensor.

OFF

Upper thread remaining amount increase (mm)

OFF Normal

555

1 - 3

By delaying the upper thread trimming timing by the amount set, it is possible to increase

the amount of upper thread remaining from normal.

Setting can be carried out in units of 1 mm.

OFF

Upper thread tension release off timing (ms)

* This is only displayed for -00 and -01 specifications.

556

0 - 100

When a larger value is set, the upper thread release off timing is delayed after upper

thread trimming.

Setting can be carried out in units of 2 ms.

* This is only enabled for -00 and -01 specifications.

Upper thread tension release off timing (ms)

* This is only displayed for -02 specifications.

557

0 - 100

When a larger value is set, the upper thread release off timing is delayed after upper

thread trimming.

Setting can be carried out in units of 2 ms.

* This is only enabled for -02 specifications.

Disabling use of lower thread trimmer

* This is only displayed for -01 and -02 specifications.

OFF Normal (lower thread trimmer operates)

558

ON Operation of the lower thread trimmer is disabled.

* This is only enabled for -01 and -02 specifications.

OFF

Verification of lower thread trimming off using timer (ms)

* This is only displayed for -01 and -02 specifications.

OFF Verification that the lower thread trimmer is off is carried out based on the lower thread

trimming off sensor.

559

5 - 50

Verification that the lower thread trimmer is off is carried out based on the timer.

Setting can be carried out in units of 5 ms.

* This is used when there is a problem with the lower thread trimming off sensor.

* This is only enabled for -01 and -02 specifications.

OFF

2. FUNCTION SETTINGS

11 RH-9820

No. Setting

range Setting items Default

value

Lower thread trimming timing (ms)

* This is only displayed for -02 specifications.

560

0 - 100

When a larger value is set, the lower thread trimming timing is delayed by more.

Setting can be carried out in units of 5 ms.

* This is only enabled for -02 specifications.

Upper thread breakage detector (option)

* This is not overwritten by CF card data.

OFF Upper thread breakage detector is disabled.

561

ON Upper thread breakage detector is enabled.

OFF

Number of stitches before upper thread breakage is detected

* This is displayed when the upper thread breakage detector is enabled.

562

1 - 9 Upper thread breakage detection starts after the set number of stitches has been sewn.

Number of stitches for upper thread breakage judgment

563 2 - 7 An upper thread breakage error occurs when the upper thread breakage signal is

continuously on for the set number of stitches.

Upper thread nipper device (option)

* This is not overwritten by CF card data.

OFF Upper thread nipper device is disabled.

564

ON Upper thread nipper device is enabled.

OFF

Upper thread nipper device closing timing correction (mm)

* This is displayed when the upper thread nipper device is enabled.

565

-10 - 10 When a larger value is set, the upper thread nipping timing is delayed by more.

Setting can be carried out in units of 1 mm.

Lapel device (option)

* This is not overwritten by CF card data.

OFF Lapel device is disabled.

566

Lapel device is enabled.

* When a straight buttonhole program is selected, the sub-hammer is lowered.

* The material setting position is automatically set to the forward position.

OFF

Program number loaded based on straight buttonhole sensor

* This is displayed when the lapel device is enabled.

OFF Normal

567

1 - 20 When there is no material underneath the straight buttonhole sensor, the program

number which has been set is loaded, and the sub-hammer is lowered.

OFF

Program number for sub-hammer to be always lowered

* This is displayed when the lapel device is enabled.

OFF Normal

568

1 - 20

When the program number that has been set is sewn, the sub-hammer is always

lowered.

* This is not affected by the status of the straight buttonhole sensor or the program

settings (eyelet pattern).

OFF

Error checking for straight buttonhole sensor

* This is displayed when the lapel device is enabled.

OFF Error checking disabled

569

Error checking enabled

An error (E942) occurs in the following cases.

(A) When there is material underneath the sensor and an attempt is made to sew a

straight buttonhole program

(B) When there is no material underneath the sensor and an attempt is made to sew an

eyelet buttonhole program

OFF

2. FUNCTION SETTINGS

RH-9820

No. Setting

range Setting items Default

value

Sub-hammer on time (ms)

* This is displayed when the lapel device is enabled.

570

5 - 100

When a larger value is set, the period of contact between the sub-hammer and the knife

becomes longer.

Setting can be carried out in units of 5 ms.

Note: If this is set to a larger value than necessary, it will shorten the useful life of

the sub-hammer and the knife.

No cutting operation using straight buttonhole sensor

OFF Normal

571

ON When sewing when there is no material underneath the straight buttonhole sensor, no

cutting is carried out, regardless of the cutting operation setting on the panel.

OFF

Fly indexer (option)

* This is not overwritten by CF card data.

OFF Fly indexer is disabled.

572

ON Fly indexer is enabled.

OFF

* If No. 567 and No. 568 have both been set, only the setting for No. 567 will be enabled.

* If No. 567 and No. 569 have both been set, only the setting for No. 567 will be enabled.

* If No. 568 and No. 569 have both been set, both settings will be enabled.

* If No. 567 and No. 568 and No. 569 have all been set, only the setting for No. 567 will be enabled.

Error processing settings

No. Setting

range Setting items Default

value

Time before buzzer stops sounding (seconds)

OFF When an error occurs, the buzzer keeps sounding until the error is cleared.

650

5 - 15 When an error occurs, the buzzer sounds for the set time and then stops.

It can be set in units of 5 sconds.

OFF

Pulse motor energization status when a non-resettable error occurs

OFF When a non-resettable error occurs, pulse motor energization is turned off.

651

ON When a non-resettable error occurs, pulse motor energization remains on.

OFF

Checking errors caused by box fan stopping

* The box fan is not currently installed.

OFF No checking of errors caused by box fan stopping.

652

ON Checking of errors caused by box fan stopping.

OFF

Assembly and maintenance settings

No. Setting

range Setting items Default

value

Continuous sewing permission

OFF Normal

750

ON Continuous sewing is allowed.

Continuous sewing can be carried out by keeping the start switch pressed.

OFF

Continuous sewing interval (ms)

* This is displayed when continuous sewing is allowed.

751

0 - 2500 The continuous sewing interval can be set.

Setting can be carried out in units of 100 ms.

1000

X cutting position correction value (mm)

* This is not overwritten by CF card data.

752

-0.50 - 0.50 The setting value is added as the X cutting position correction value for all programs.

Setting can be carried out in units of 0.05 mm.

2. FUNCTION SETTINGS

13 RH-9820

Specifications and destination settings

No. Setting

range Setting items Default

value

Machine head specifications

* This is not overwritten by CF card data.

NOTE: Always be sure to set this to match the machine head specifications.

-00 Sets to -00 specifications.

-01 Sets to -01 specifications.

850

-02 Sets to -02 specifications.

Work clamp size

* This is only displayed for -02 specifications.

* This is not overwritten by CF card data.

NOTE: Always be sure to set this to match the work clamp specifications.

L1422 Sets to L1422 specifications.

The setting range for the sewing length will be 14 - 22 mm.

L1826 Sets to L1826 specifications.

The setting range for the sewing length will be 18 - 26 mm.

L2230 Sets to L2230 specifications.

The setting range for the sewing length will be 22 - 30 mm.

L2634 Sets to L2634 specifications.

The setting range for the sewing length will be 26 - 34 mm.

851

L3442 Sets to L3442 specifications.

The setting range for the sewing length will be 34 - 42 mm.

Circular stitch work clamp

* This is only displayed for -00 and -01 specifications.

* This is not overwritten by CF card data.

NOTE: Always be sure to set this to match the work clamp specifications.

OFF When using a normal (not circular stitch) work clamp

852

ON When using a circular stitch work clamp

Parameters only for circular stitches will be displayed when programming.

Language

* This is not overwritten by CF card data.

853

English

Japanese

Chinese

Spanish

German

French

Italian

Turkish

Portuguese

Indonesian

Vietnamese (Ver. 1.1.00 or later)

Russian (Ver. 1.1.00 or later)

The language can be selected from 12 available languages.

Sewing fold point correction value (mm)

OFF Normal

854

Straight buttonholes can be formed with the eyelet knife still installed.

At this time, the sewing fold point will be 6 mm forward of the normal point.

In addition, the maximum sewing length for straight buttonholes will be 6 mm smaller

than normal.

* This is enabled when sewing straight buttonholes.

OFF

2. FUNCTION SETTINGS

RH-9820

2-5. Error history checking method

The past error history can be checked by the following procedure.

1 While holding down the key, push the POWER switch at the ON side (1).

The error history (A) will be displayed. (The display starting from the left

side will be: history number, error code and production counter.)

2 When the or key is pressed, the history numbers will change.

* Up to 64 history events can be recorded, starting from the latest to be

recorded. (No. 1 will be the latest error that has occurred.)

3 [To exit error history checking mode]

The sewing machine will change to home position detection standby.

(A)

0413B

0718B

0448B

0979B

2. FUNCTION SETTINGS

15 RH-9820

2-6. Input checking method

Use this to check for any malfunctions of the operation panel keys, circuit boards or sensors, and for checking for broken cords

and for adjusting sensor positions. This checks if the CPU is reading signals from the key and the sensor correctly.

1 Release the air.

2 While holding down the key, push the POWER switch at the ON side (1).

The mode will switch to input checking mode.

3 Select the check number (A) to be checked.

4 Refer to the input check list for key and sensor responses.

5 [To return to normal operation]

Press the POWER switch at the OFF side to turn off the power, turn on the air, and then turn the power back on.

0732B

(A)

0413B

0980B

2. FUNCTION SETTINGS

RH-9820

No. Check item Checking method Judgment

1 Power supply voltage → Normally around 100%

2 X axis home position sensor Move the feed base to the left and

right by hand.

Left area: No switching ON/OFF

Right area: Switches ON/OFF

3 X axis encoder signal Move the feed base to the left and

right by hand.

Left direction: Up

Right direction: Down

* When the power is turned on, the

position will be 0.

4 Y axis home position sensor Move the feed base forward and

back by hand.

Forward area: OFF

Backward area: ON

5 Y axis encoder signal Move the feed base forward and

back by hand.

Forward direction: Up

Backward direction: Down

* When the power is turned on, the

position will be 0.

6 θ axis home position sensor Turn the looper base by hand.

Counterclockwise turning area: No

switching ON/OFF

Clockwise turning area: Switches ON/OFF

7 θ axis encoder signal Turn the looper base by hand.

Counterclockwise direction: Up

Clockwise direction: Down

* When the power is turned on, the

position will be 0.

8 Treadle analog value Operate the treadle.

When depressed backward: About 48

When at neutral position: About 100

When depressed forward: About 190

9 Work clamp switch Press the work clamp switch. ON: When pressed

OFF: When not pressed

10 Start switch Press the start switch. ON: When pressed

OFF: When not pressed

11 STOP switch connection

signal → ON: Connected

OFF: Not connected

12 STOP switch Press the STOP switch. ON: When pressed

OFF: When not pressed

13 Machine head safety switch Tilt back the machine head. ON: Normal condition

OFF: Machine head is tilted back

14 Hammer position sensor → Normally around 190

15 Lower thread trimming OFF

sensor

Turn the lower thread trimming

cylinder on and off manually.

ON: When cylinder is off

OFF: When cylinder is on

16 Fan lock detection signal → ON: Fan is not operating

OFF: Fan is operating

17 Zigzag sensor Turn the upper shaft pulley by

hand.

ON: Inner zigzag

OFF: Outer zigzag

18 Needle up signal Turn the upper shaft pulley by

hand.

ON: Raised

OFF: Not raised

19 Needle drop signal Turn the upper shaft pulley by

hand.

ON: Lowered

OFF: Not lowered

20 Upper shaft encoder signal Turn the upper shaft pulley by

hand.

Normal rotation: Up

Reverse rotation: Down

* Normally within the range of 0 - 179.

However, an unstable value may be

displayed just before a single rotation

is completed.

2. FUNCTION SETTINGS

17 RH-9820

No. Check item Checking method Judgment

21 key

22 key

23 ENTER key

24 Shortcut 1 key

25 Shortcut 2 key

26 Shortcut 3 key

27 Shortcut 4 key

28 Shortcut 5 key

29 Shortcut 6 key

30 AUTO key

31 TEST key

32 MANUAL key

33 CYCLE key

34 PROGRAM key

35 RESET key

36 THREAD key

37 FRONT/BACK key

38 BEFORE key

39 AFTER key

40 F key

Press the corresponding key. ON: When pressed

OFF: When not pressed

41 Upper thread breakage

detection signal

Move the upper thread back and

forth inside the sensor.

ON: No moving back and forth

OFF: Moving back and forth

42 Straight buttonhole position

sensor

Move the sub-hammer up and

down by hand.

ON: When sub-hammer is lowered

OFF: When sub-hammer is raised

43 Eyelet buttonhole position

sensor

Move the sub-hammer up and

down by hand.

ON: When sub-hammer is raised

OFF: When sub-hammer is lowered

44 Straight buttonhole sensor Place material underneath the

straight buttonhole sensor.

ON: No material underneath sensor

OFF: Material underneath sensor

45 Feed plate home position

sensor Install the feed plate. ON: Installed

OFF: Not installed

46 Feed plate drive cylinder left

sensor

Turn the feed plate drive cylinder

on and off manually.

ON: When cylinder is off

OFF: When cylinder is on

47 Feed plate drive cylinder

right sensor

Turn the feed plate drive cylinder

on and off manually.

ON: When cylinder is on

OFF: When cylinder is off

48 External input signal 1 → ON: Connected

OFF: Not connected

49 External input signal 2 → ON: Connected

OFF: Not connected

50 Sensor input 1

51 Sensor input 2

This is a spare signal for special orders.

(Applicable for main control program (MN) version 1.2.00 and later)

2. FUNCTION SETTINGS

RH-9820

2-7. Output checking method

Use this to check for any malfunctions of the circuit boards, and for checking for problems with drive mechanisms and broken

cords. This checks if the CPU output signal is working correctly.

NOTE:

When checking operation, the mechanisms may be obstructed and become damaged, so remove the left and right work clamp

plates (Z) before checking output.

1 While holding down the key, push the POWER switch at the ON side (1).

The sewing machine will switch to starting standby mode.

2 Press the start switch (2).

The feed base will move to the home position.

3 Select the check number (A) to be checked.

* Refer to the output check list for the details of signals being checked.

4 Press the start switch (2).

The operation corresponding to the signal being checked will be carried

out.

5 [To return to normal operation]

Press the POWER switch at the OFF side to turn off the power, and then turn the power back on.

0749B

0413B 0731B

(A)

0981B

0982B

2. FUNCTION SETTINGS

19 RH-9820

No. Check item Operation

1 Work clamp The work clamp will be lowered while the start switch is being pressed.

2 Spreader The spreader will open while the start switch is being pressed.

3 Upper thread

take-up The thread take-up lever will be lowered while the start switch is being pressed.

4 Lower tension

release

The lower tension will be released for 0.1 seconds.

* An error will not occur if the machine head is tilted back.

5 Gimp clamp

The gimp thread will be pressed for 0.1 seconds.

* -02 specifications only

6 X-axis motor

The buzzer will sound for 0.7 second, and then the work clamp will be lowered, the

spreader will open and the feed base will move +20 mm in the Y axis direction. The feed

base will then oscillate in the X axis direction within a range of -6 mm to +6 mm.

It will stop when the start switch is released.

7 Y-axis motor

The buzzer will sound for 0.7 second, and then the work clamp will be lowered and the

spreader will open. The feed base will then oscillate in the Y axis direction within a range

of 0 mm to +65 mm.

It will stop when the start switch is released.

8 θ-axis motor

The buzzer will sound for 0.7 second, and then the work clamp will be lowered and the

spreader will open. The looper base will then oscillate in the θ axis direction within a range

of -49.5° to +364.5°.

It will stop when the start switch is released.

9 Upper shaft motor

The buzzer will sound for 0.7 second, and then the work clamp will be lowered and the

upper shaft motor will start.

It will stop when the start switch is released.

The upper shaft encoder value (stop position) will be displayed immediately after the

upper shaft stops.

Normally a value of about 166 should be displayed.

The speed (1000 - 2500 rpm) can be changed using the and keys while the upper

shaft is stopped.

NOTE:

Remove the thread before carrying out this check in order to prevent needle

breakages.

10 Hammer

The buzzer will sound for 0.7 second, and then the work clamp will be lowered and the

hammer will be lowered.

NOTE:

This operation is dangerous, so check to make sure that there are no hands or

other objects underneath the hammer before carrying out the check.

11 Upper thread

trimming

The buzzer will sound for 0.7 second, and then the θshaft will turn 180° and upper thread

trimming will turn on.

12 Lower thread

trimming

-01 specifications:

The buzzer will sound for 0.7 second, and then the work clamp will be lowered and the

spreader will open, and then theθshaft will turn 135° and lower thread trimming will

turn on.

-02 specifications:

The buzzer will sound for 0.7 second, and then the spreader will open, and then the

θshaft will turn 180°and lower thread trimming will turn on.

13 Buzzer The buzzer will sound while the start switch is being pressed.

2. FUNCTION SETTINGS

RH-9820

No. Check item Operation

14 Panel indicators The 11 panel indicators will illuminate one by one.

15 Upper tension

release The upper tension will be released while the start switch is being pressed.

16 X axis encoder

The buzzer will sound for 0.7 second, and then the work clamp will be lowered, the

spreader will open and the feed will move +20 mm in the Y axis direction. The feed will

then oscillate in the X axis direction within a range of -6 mm to +6 mm.

It will stop when the start switch is released.

* Encoder offset is measured and displayed during operation.

17 Y axis encoder

The buzzer will sound for 0.7 second, and then the work clamp will be lowered and the

spreader will open. The feed will then oscillate in the Y axis direction within a range of 0

mm to +65 mm.

It will stop when the start switch is released.

* Encoder offset is measured and displayed during operation.

18 θ axis encoder

The buzzer will sound for 0.7 second, and then the work clamp will be lowered and the

spreader will open. The looper base will then oscillate in the θ axis direction within a range

of -49.5° to +364.5°.

It will stop when the start switch is released.

* Encoder offset is measured and displayed during operation.

Upper thread

nipper device

vertical movement

The upper thread nipper device will be lowered while the start switch is being pressed.

* Only with the upper thread nipper device

Upper thread

nipper device

forward/back

movement

The upper thread nipper device will move forward while the start switch is being pressed.

* Only with the upper thread nipper device

Upper thread

nipper device

opening/closing

The upper thread nipper device will open while the start switch is being pressed.

* Only with the upper thread nipper device

22 Sub-hammer

After the feed base has moved forward, the sub-hammer will be lowered.

* Only with the lapel device

Indexer feed plate

auxiliary clamp

arm

The feed plate auxiliary clamp arm of the fly indexer will turn on while the start switch is

being pressed.

* Only with the fly indexer

24 Indexer chuck

The chuck of the fly indexer will turn on while the start switch is being pressed.

* Only with the fly indexer

25 Indexer feed plate

The feed plate of the fly indexer will move to the right while the start switch is being

pressed.

* Only with the fly indexer

26 Valve output 1

27 Valve output 2

28 Valve output 3

29 Valve output 4

This is a spare signal for special orders.

(Applicable for main control program (MN) version 1.2.00 and later)

2. FUNCTION SETTINGS

21 RH-9820

2-8. Software version checking method

1 While holding down the key, push the POWER switch at the ON side(1).

The control program versions (A) will be displayed.

MN … Main control program

MT … Motor control program

PL … Panel control program

When the F key is pressed, the IPL versions (B) will be displayed.

MN … Main IPL

PL … Panel IPL

2 [To exit version checking mode]

The sewing machine will change to home position detection standby.

(A)

0721B

0710B

0452B

0448B

(B)

0983B

3. READING/WRITING DATA

RH-9820

3. READING/WRITING DATA

3-1. Precautions when handling CF cards (commercially available)

・ Use CF cards with a capacity of 32, 64, 128 or 256 MB.

・ Do not attempt to disassemble or modify the CF cards.

・ Do not forcibly bend, drop or scratch CF cards or place heavy objects on top of them.

・ Do not allow CF cards to come into contact with liquids such as water, oil, solvents or drinks.

・ Use and store the CF cards in places that are free from strong magnetic fields and electronic interference.

・ Do not use or store the CF cards in places which are subject to vibration, shocks, direct sunlight, dust from items such as

thread scraps, high humidity, sudden changes in temperature, or strong magnetic fields from equipment such as speakers.

・ Do not subject the CF cards to vibration or shocks or remove them from the sewing machine while data reading or writing is

in progress.

・ The data on the CF cards may become lost or corrupted due to some malfunction or accident. It is recommended that you

make backups of important data.

・ Be sure to turn off the power for the sewing machine before inserting and removing CF cards.

・ CF cards are already formatted at the time of purchase, so do not reformat them.

・ The recommended CF cards are commercially-available ones from SanDisk or HAGIWARA SYS-COM. CF cards from

other manufacturers can be used, but different formatting methods may mean that reading from or writing to such cards

may not be possible.

For more information, refer to the documentation provided with the CF card.

* This product is compatible with CF cards that have been formatted using the FAT16 method. Cards that have been

formatted using the FAT32 method cannot be used.

* CFTM is a trademark of SanDisk Corporation.

* Company names and product names appearing in this manual are trademarks or registered trademarks of the

respective owners. However, no TM or other similar symbols appear in the main text of this manual.

3-2. Structure of a CF card folder

Data type Folder name Filenames

Error logs \BROTHER\ISM\ISMDC00\ISMLDT00\

E*******.LDT ← Error log

M*******.LDT ← Memory switches

* ****** is a name unique to the sewing

machine.

Memory switches \BROTHER\ISM\ISMDC00\ ISMMSW.SEW

Parameter data As above ISMUPG.SEW

Main control

program \BROTHER\ISM\ISMSYS\ ISM03MN.MOT

Panel control

program As above ISM03PL.MOT

3. READING/WRITING DATA

23 RH-9820

3-3. Data read/write mode

1 With the power turned off, insert the CF card into the CF slot.

NOTE:

・ Make sure the CF card is facing the correct way.

(The side with the notches should be facing toward the left,

and the side with the small holes should be facing toward

the CF slot when the card is inserted.)

・ Always be sure to keep the cover closed except when

inserting and removing the CF card. If this is not done,

dust may get inside and cause problems with operation.

2 While pressing the TEST key and the F key, push the POWER switch at the ON side(1).

The mode will switch to data read/write mode.

* You can switch to data read/write mode by pressing

the TEST key and the F key together, even when in

test mode.

3 Select the desired read/write code (A). (Refer to <Read/write code list> given below.)

4 [To exit data read/write mode]

Code Setting items

R1 Parameter data is read from the CF card.

W2 Parameter data is written to the CF card.

R3 Memory switch settings are read from the CF card.

W4 Memory switch settings are written to the CF card.

R5 The main control program is read from the CF card and used to update the firmware version.

W6 The error log is written to the CF card.

R7 The panel control program is read from the CF card and used to update the firmware version.

Small holes

Notches

0750B

0413B

(A)

0727B

0725B

0448B

0984B

3. READING/WRITING DATA

RH-9820

3-4. Reading parameter data from the CF card

1. Select R1 in data read/write mode.

2. Press the ENTER key.

The parameter data for all programs on the CF card will be read.

Once reading is complete, a “COMPLETED” message and the power off symbol

will be displayed.

3. Push the POWER switch to the OFF side to turn off the power, and then turn the

power back on again.

3-5. Writing parameter data to the CF card

1. Select W2 in data read/write mode.

2. Press the ENTER key.

The parameter data for all programs in the sewing machine will be written to the

CF card.

Once writing is complete, the buzzer will sound.

3. Press the TEST key.

Data read/write mode will end.

3-6. Reading memory switch data from the CF card

1. Select R3 in data read/write mode.

2. Press the ENTER key.

The memory switch data will be read from the CF card (except for some memory

switch data).

* Memory switch data relating to specifications and devices (050, 561, 564,

566, 572, 752, 850, 851, 852 and 853) will not be read.

Once writing is complete, a “COMPLETED” message and the power off

symbol will be displayed.

3. Push the POWER switch to the OFF side to turn off the power, and then turn the

power back on again.

3-7. Writing memory switch data to CF cards

1. Select W4 in data read/write mode.

2. Press the ENTER key.

All memory switch data from the sewing machine will be written to the CF card.

Once writing is complete, the buzzer will sound.

3. Press the TEST key.

Data read/write mode will end.

0724B

0728B

0723B

0727B

3. READING/WRITING DATA

25 RH-9820

3-8. Writing error log data to the CF card

1. Select W6 in data read/write mode.

2. Press the ENTER key.

The error log in the sewing machine will be written to the CF card.

The memory switch settings will also be written at this time.

However, the file destination will be different from the one mentioned in “3-7.”

above.

Once writing is complete, the buzzer will sound.

3. Press the TEST key.

Data read/write mode will end.

3-9. Updating the main control program

1. Select R5 in data read/write mode.

2. Press the ENTER key.

A confirmation message will be displayed.

3. Press the ENTER key. (If you press the RESET key, the operation will be

canceled.)

Firmware updating will start. (It should take about one minute.)

Once writing is complete, an “UPDATED SUCCESSFULLY” message and the

power off symbol will be displayed.

4. Push the POWER switch to the OFF side to turn off the power, and then turn the

power back on again.

3-10. Updating the panel control program

1. Select R7 in data read/write mode.

2. Press the ENTER key.

A confirmation message will be displayed.

3. Press the ENTER key. (If you press the RESET key, the operation will be

canceled.)

Firmware updating will start. (It should take about three minutes.)

Once writing is complete, a “COMPLETED” message and the power off symbol

will be displayed.

4. Push the POWER switch to the OFF side to turn off the power, and then turn the

power back on again.

0729B

0725B

0726B

4. MECHANICAL DESCRIPTIONS

RH-9820 26

4. MECHANICAL DESCRIPTIONS

Each mechanism operates in the order of the numbers shown in the illustration.

* <number> indicate the flow of operations that occur separately from each other.

4-1. Upper shaft and Needle bar mechanisms

1. Motor assembly

2. Lower shaft

3. Upper shaft

4. Upper shaft crank

5. Needle bar crank

6. Crank rod unit

7. Needle bar clamp

8. Spacer

9. Needle bar

0658B

4. MECHANICAL DESCRIPTIONS

RH-9820

4-2. Zigzag and thread take-up mechanisms

1. Upper shaft

2. Hypoid gear

3. Orthogonal shaft

4. Zigzag cam <4> Roller take-up cam

5. Zigzag fork <5> Thread take-up roller

6. Zigzag connecting rod <6> Thread take-up

7. Zigzag crank

8. Zigzag driving lever

9. Zigzag lever

10. Zigzag horizon link

11. Needle bar block bracket

12. Needle bar block

13. Needle bar guide

0659B

4. MECHANICAL DESCRIPTIONS

RH-9820 28

4-3. Needle bar rocking mechanism

1. Pulse motor R

2. Theta M pulley assembly

3. Timing belt D

4. Looper pulley assembly <4> Driving looper shaft assembly

5. Looper base assembly <5> Vertical shaft timing pulley U assembly

<6> Timing belt U

<7> Needle bar gear block unit

0660B

4. MECHANICAL DESCRIPTIONS

RH-9820

4-4. Feed mechanism

1. Pulse motor X

2. Feed gear

3. Idler gear

4. X rack

5. X feed shaft holder N

6. X feed guide shaft A, B

7. X feed shaft holder S

8. Y feed guide shaft

9. Feed base

1. Pulse motor Y

2. Driving gear 20

3. Idler gear

4. Timing pulley

5. Y Timing belt

6. Y driving shaft holder, Belt holder

7. Y shaft

8. Y bearing

9. Y guide shaft

10. Feed base

0661B

0662B

4. MECHANICAL DESCRIPTIONS

RH-9820 30

4-5. Presser foot mechanism

1. Clamp cylinder 16X10

2. Clamp cylinder rod

3. Clamp cylinder rod pin

4. Clamp driving lever

5. Clamp lever shaft

6. Clamp lever B

7. Clamp lever

8. Clamp arm

9. Work clamp

Because the air is bled from the clamp cylinder, the force from the spring (1) has the opposite effect from when lowered.

1. Spring

2. Clamp cylinder 16X10

3. Clamp cylinder rod

4. Clamp cylinder rod pin

5. Clamp driving lever

6. Clamp lever shaft

7. Clamp lever B

8. Clamp lever

9. Clamp arm

10. Work clamp

0663B

0783B

4. MECHANICAL DESCRIPTIONS

RH-9820

4-6. Cloth opening mechanism

1. Opening cylinder assembly 16X15

2. Opening cylinder rod

3. Opening cylinder rod pin

4. Opening driving lever

5. Opening connecting rod

6. Slide block

7. Fulcrum lever plate

8. Rocker lever

9. Work clamp plate

a. Bolt

b. Extension spring

c. Opening stopper plate

0664B

4. MECHANICAL DESCRIPTIONS

RH-9820 32

4-7. Cutter mechanism

1. Cylinder 63X100

2. Cylinder rod

3. Cutter lever

4. Cutter link

5. Cutter arm assembly

6. Cutter arm slide block

7. Driving shaft presser

8. Cutter driving shaft

9. Hammer bracket assembly

10. Hammer

a. Knife bracket unit

b. Knife

c. Spring extension

4-8. Looper mechanism

1. Lower shaft

2. Lower shaft cam

3. Lower shaft cam collar

4. Looper lever assembly

5. Looper driving plate

6. Looper driving shaft

7. Looper link clamp

8. Looper link unit

9. LS holder base assembly

10. Looper

0665B

0666B

4. MECHANICAL DESCRIPTIONS

RH-9820

4-9. Spreader mechanism

1. Lower shaft

2. Lower shaft cam

3. Spreader lever A

4. Spreader lever B

5. Slide block

6. Spreader link shaft

7. Spreader link base

8. Spreader cam link

9. Spreader driving cam

10. Spreader

4-10. Upper thread trimmer mechanism

1. Upper thread trimmer cylinder

2. Hammer

3. Thread trimmer lever bracket

4. Upper movable knife

0667B

0668B

4. MECHANICAL DESCRIPTIONS

RH-9820 34

4-11. Upper tension release mechanism

1. Upper tension release solenoid

2. Bolt

3. Tension release pin

4-12. Upper thread take-up mechanism

1. Cylinder assembly 10-30

2. Cylinder joint A

3. Collar B <3> Rubber cushion

4. Thread take-up lever driving plate <4> Impact support shaft

5. Thread take-up lever plate <5> Spring compression A

0669B

0670B

4. MECHANICAL DESCRIPTIONS

RH-9820

4-13. Lower thread release and lower thread take-up mechanisms

<-01>

1. Lower thread tension release solenoid

2. Lower solenoid shaft

3. Lower thread take-up guide lever

(thread take-up)

4. Tension release pin (tension release)

<-00, -02：Lower thread release only >

1. Lower tension release solenoid

2. Lower solenoid shaft

3. Lower thread release plate

4. Tension release pin (tension release)

4-14. Gimp thread take-up mechanism <-01 specifications only>

1. Feed bar (Y direction operation)

2. Gimp thread take-up guide collar

3. Gimp thread take-up G-E plate

4. Gimp thread take-up guide plate

0671B

0672B

4. MECHANICAL DESCRIPTIONS

RH-9820 36

4-15. Lower thread trimmer mechanism

<-01>

1. Cylinder assembly 16X30 B

2. Thread trimmer lever

3. Thread cutter lever arm

4. Thread trimmer arm

<-02>

1. Cylinder 16X30 assembly B

2. Thread trimmer lever J assembly

3. Thread trimmer lever arm B

4. Movable knife driving plate

5. Thread trimmer link A assembly <5> Thread trimmer link B assembly

6. Movable knife L <6> Movable knife R

0673B

0674B

Refer to “Principle of the

thread handler” in “7-25-5.

djusting the thread handle

”

for details about the thread

handler [A].

4. MECHANICAL DESCRIPTIONS

RH-9820

5. DISASSEMBLY

RH-9820 38

5. DISASSEMBLY

DANGER

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the

wall outlet before opening the cover of the control box. Touching areas where high voltages are present

can result in severe injury.

CAUTION

Disassembly should only be carried out by a

qualified technician.

Turn off the power switch and disconnect the

power cord at the following times. If this is not

done, the sewing machine may operate if the

start switch is pressed by mistake, which could

result in serious injury.

Disconnect the air hoses from the air supply

and wait for the needle on the pressure gauge

to drop to “0” before carrying out inspection,

adjustment and repair of any parts which use

the pneumatic equipment.

Be sure to wear protective goggles and gloves

when handling the lubricating oil and grease,

so that they do not get into your eyes or onto

your skin, otherwise inflammation can result.

Furthermore, do not drink the oil or eat the

grease under any circumstances, as they can

cause vomiting and diarrhea.

Keep the oil out of the reach of children.

Use only the proper replacement parts as

specified by Brother.

If any safety devices have been removed, be

absolutely sure to re-install them to their

original positions and check that they operate

correctly before using the machine.

Any problems in machine operation which

result from unauthorized modifications to the

machine will not be covered by the warranty.

5. DISASSEMBLY

RH-9820

Disassemble the parts in the order shown in the illustration.

5-1. Covers and presser foot mechanism

* Start with the machine head in its upright position.

1. Screw (Loosen)

2. Needle

3. Screws [9 pcs]

4. Top cover

5. Screws with washers [4 pcs]

6. Belt cover

7. Screws [2 pcs]

8. Plain washers [2 pcs]

9. Eye guard

10. Screws [4 pcs]

11. Main plate

12. Socket bolts [2 pcs]

13. Needle bar guard

14. Screws [4 pcs]

15. Needle guide cover

16. Screws [5 pcs]

17. Rear cover

18. Shoulder screw

19. Wave washer

20. Zigzag window cover

21. Work clamp plate R assembly

22. Work clamp plate L assembly

(Tilt back the machine head.)

23. Screws [3 pcs]

24. Cam cover

1079B

5. DISASSEMBLY

RH-9820 40

5-2. Upper shaft motor unit mechanism

* Start with the machine head in its upright position.

1. Screws [2 pcs]

2. Belt guide

3. Socket bolts with washers [2 pcs]

(Tilt back the machine head.)

4. Socket bolt with washer [1 pcs]

5. Upper shaft motor unit

1080B

5. DISASSEMBLY

RH-9820

5-3. Feed mechanism

5-3-1. Feed base unit

* Carry out the following with the machine head in the upright position.

1. Screw (Loosen)

2. Hammer

3. Socket bolt (Loosen)

4. Knife

5. Truss screws [2 pcs]

6. Feed base cover U

7. Shoulder screws [2 pcs]

8. Bending washers [2 pcs]

9. Plate pressers [2 pcs]

10. Flat screws [12 pcs]

11. Feed base cover R

12. Feed base cover L

13. Socket bolts with washers

[2 pcs]

14. Set screws [4 pcs] (Loosen)

15. X feed guide shafts [2 pcs]

(Pull forward to remove)

16. Feed base unit

1081B

5. DISASSEMBLY

RH-9820 42

5-3-2. X feed unit

* Carry out the following with the machine head tilted back.

17. Socket bolts [3 pcs]

18. X feed assembly

5-3-3. Y feed unit

* Disassemble the “5-2. Upper shaft motor unit mechanism” before disassembling the “5-3-3. Y feed unit”.

* Start with the machine head in its upright position.

19. Socket bolt (Loosen)

20. Y shaft holder

(Tilt back the machine head.)

21. Socket bolt (Loosen)

(Return the machine head to its

upright position.)

22. Y shaft (Pull backward to remove)

(Tilt back the machine head.)

23. Socket bolts [3 pcs]

24. Y feed assembly

1082B

1083B

5. DISASSEMBLY

RH-9820

5-4. Lower thread tension mechanism

* Carry out the following with the machine head tilted back.

1. Socket bolts [3 pcs]

2. Lower thread guide adjust assembly

1084B

5. DISASSEMBLY

RH-9820 44

5-5. Spreader mechanism

* Carry out the disassembly procedure in “5-4. Lower thread tension mechanism” before the disassembly

procedure in “5-5. Spreader mechanism”.

* Carry out the following with the machine head tilted back.

1. Screw

2. Tube support B

3. Screw (Loosen)

4. Set screws [2 pcs] (Loosen)

5. Spreader lever shaft

6. Screws [2 pcs]

7. Spreader lever B assembly

8. Spreader lever shaft

9. Spreader lever A assembly

1085B

5. DISASSEMBLY

RH-9820

5-6. Looper mechanism

* Carry out the disassembly procedure in “5-5. Spreader mechanism” before the disassembly procedure in

“5-6. Looper mechanism”.

* Carry out the following with the machine head tilted back.

1. Screw (Loosen)

2. Socket bolt (Loosen)

3. Looper driving shaft

4. Looper driving shaft bracket

5. Set screws [2 pcs] (Loosen)

6. Looper lever shaft

7. Looper lever assembly

1086B

5. DISASSEMBLY

RH-9820 46

5-7. Needle bar rocking mechanism

* Carry out the disassembly procedure in “5-2. Upper shaft motor unit mechanism” before the disassembly

procedure in “5-7. Needle bar rocking mechanism”.

* Start with the machine head tilted back.

1. Socket bolts with washers

[2 pcs]

2. Tension pulley D assembly

3. Socket bolts [2 pcs]

4. Motor stopper

5. Socket bolts with washers

[4 pcs]

6. Pulse motor assembly R

7. Timing belt D

(Return the machine head to its

upright position.)

8. Socket bolts with washers

[2 pcs]

9. Tension pulley U assembly

10. Socket bolt (Loosen)

11. Set screws [2 pcs] (Loosen)

(Tilt back the machine head once

more.)

12. Driving looper shaft assembly

13. Vertical shaft timing pulley U

assembly

14. Timing belt U

1077B

5. DISASSEMBLY

RH-9820

5-8. Looper base mechanism

* Carry out the disassembly procedure in “5-5. Spreader mechanism” and the “5-6. Looper mechanism”

before the disassembly procedure in “5-8. Looper base mechanism”.

* Carry out the following with the machine head tilted back.

1. Socket bolts [2 pcs]

2. Partition

3. Screw (Loosen)

4. Looper pulley (screw type)

5. Looper base unit

1078B

5. DISASSEMBLY

RH-9820 48

5-9. Needle bar mechanism

* Carry out the following with the

machine head in the upright

position.

1. Socket bolts [4 pcs]

2. Slide block guide F

3. Screws [2 pcs]

4. Needle bar guide support

plates [2 pcs]

5. Needle bar guide springs

[2 pcs]

6. Needle bar guides [2 pcs]

7. Plain washers [2 pcs]

8. Set screws [2 pcs] (Loosen)

9. Needle bar guide collars

[2 pcs]

10. Set screw

11. Shoulder screw

12. Tension spring, Needle thread

holder plate, Needle guide A

13. Screws [2 pcs] (Loosen)

14. Needle bar assembly

(Pull out from the top)

15. Needle bar clamp [2 pcs]

16. Washers [2 pcs]

17. Rubber cap

18. Set screws [3 pcs] (Loosen)

19. Needle bar crank, Crank rod

unit

20. Slide block

21. Socket bolts [5 pcs]

22. Slide block guide D

1088B

5. DISASSEMBLY

RH-9820

5-10. Lubrication

1089B

5. DISASSEMBLY

RH-9820 50

1. Screw

2. Cord holder

3. Felt

4. Screw

5. Tube support B

6. Felt

7. Felt

8. Wick

9. Wick

10. Cord holders (7N) [4 pcs]

11. Screws [4 pcs]

12. Oil tube

13. Tube clip spring

14. Socket bolts [2 pcs]

15. Sub-tank assembly

16. Screw

17. Cord holder (NK-3N)

18. Screws [3 pcs]

19. Cord holders #10 [3 pcs]

20. Lower shaft cover

assembly

21. Felt

22. Oil gauge window

23. Screw

24. Cord holder #5

25. Screws [4 pcs]

26. Oil plate assembly

27. Screw

28. Cord holder (NK-3N)

29. Screw

30. Cord holder (4N)

31. Screw

32. Cord holder

33. Screw

34. Cord holder (NK-3N)

35. Socket bolts [2 pcs]

36. Tube support assembly

(From this point on, disassemble

after the disassembly in “5-13.

Cutter mechanism” has been

done.)

37. Socket bolt

38. Tube guide

39. Felt assembly

5. DISASSEMBLY

RH-9820

5-11. Zigzag and thread take-up mechanisms

* Carry out the following with the

machine head in the upright position.

1. Screw (Loosen)

2. Needle bar block bracket

(screw type)

3. Set screws [2 pcs] (Loosen)

4. Zigzag cam (Slide to remove

from zigzag fork.)

5. Set screws [2 pcs] (Loosen)

6. Zigzag coaxial rock shaft

(Pull out)

7. Spacer

8. Set screw (Loosen)

9. Zigzag fork support shaft

(Pull out)

10. Zigzag unit (Remove the whole

unit from the side of the arm

main plate.)

11. Needle bar block collar

12. Set screw (Loosen)

13. Thread take-up L support shaft

(Pull out)

14. Thread take-up lever unit

(Remove the roller from the

grooved cam and lift upward.)

1090B

5. DISASSEMBLY

RH-9820 52

5-12. Upper shaft mechanism

* Carry out the following with the machine head in the upright position.

1. Screw

2. Set screw (Loosen)

3. Set screws [2 pcs]

(Loosen)

4. Set screws [2 pcs]

(Loosen)

5. Set screws [2 pcs]

(Loosen)

6. Set screws [2 pcs]

(Loosen)

7. Upper shaft unit

(Pull out from the back.)

8. Pinion

9. Screws [3 pcs]

10. Plain washers [3 pcs]

11. Pulley

12. Set screws [2 pcs] (Loosen)

13. Set screws [2 pcs] (Loosen)

14. Set screws [2 pcs] (Loosen)

15. Set screws [2 pcs] (Loosen)

16. Orthogonal shaft unit

(Pull out from the rear cover.)

17. Pulley base

18. Take-up cam roller

19. Gear

20. Zigzag cam

NOTE:

The bearing unit (16) and the bearing inner rings <A> and are joined with adhesive, so avoid

disassembling them if possible.

1091B

5. DISASSEMBLY

RH-9820

5-13. Cutter mechanism

* Start with the machine head in its upright position.

1. Screws [2 pcs]

2. Cutter sensor assembly

3. Set screws [2 pcs]

(Loosen)

4. Cutter arm pin (Pull out)

5. Set screw (Loosen)

6. Cylinder rod shaft

(Pull out)

7. Set screw (Loosen)

8. Cutter lever shaft

(Pull out)

9. Cutter lever assembly

10. Set screws [2 pcs]

(Loosen)

11. Set screws [2 pcs]

(Loosen)

12. Cutter arm shaft (Pull out)

13. Cutter arm assembly

(Tilt back the machine head.)

14. Set screws [2 pcs] (Loosen)

15. Cylinder support shaft (Pull out)

(Return the machine head to the

upright position once more.)

16. Cylinder assembly

(Lift up to remove)

17. Socket bolts [4 pcs]

18. Hammer bracket assembly

19. Socket bolts [3 pcs]

20. Cutter driving shaft unit

(Pull down to remove)

21. Socket bolt

22. Knife bracket unit

23. Eccentric pin

1092B

6. ASSEMBLY

RH-9820 54

6. ASSEMBLY

DANGER

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the

wall outlet before opening the cover of the control box. Touching areas where high voltages are present

can result in severe injury.

CAUTION

Assembly should only be carried out by a

qualified technician.

Turn off the power switch and disconnect the

power cord at the following times. If this is not

done, the sewing machine may operate if the

start switch is pressed by mistake, which could

result in serious injury.

If the power switch needs to be left on when

carrying out some adjustment, be extremely

careful to observe all safety precautions.

Disconnect the air hoses from the air supply

and wait for the needle on the pressure gauge

to drop to “0” before carrying out inspection,

adjustment and repair of any parts which use

the pneumatic equipment.

Be sure to wear protective goggles and gloves

when handling the lubricating oil and grease,

so that they do not get into your eyes or onto

your skin, otherwise inflammation can result.

Furthermore, do not drink the oil or eat the

grease under any circumstances, as they can

cause vomiting and diarrhea.

Keep the oil out of the reach of children.

Use only the proper replacement parts as

specified by Brother.

If any safety devices have been removed, be

absolutely sure to re-install them to their

original positions and check that they operate

correctly before using the machine.

Any problems in machine operation which

result from unauthorized modifications to the

machine will not be covered by the warranty.

6. ASSEMBLY

RH-9820

・ Assemble each part in the order shown in the illustration.

・ Parts indicated by are part of the same assembly.

6-1. Cutter mechanism

* Carry out assembly steps <1> to <8> in “6-25. Lubrication and greasing and routing the oil tubes” before

carrying out the assembly in “6-1. Cutter mechanism”.

* Refer to the detailed descriptions on the next page for details on A to D in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

0785B

Refer to “7-16-2.

Making fine adjustments

to the knife position”.

Refer to “7-14.

djusting the

axial play of

the hammer”.

djust so that the cutter

driving shaft (2) turns

smoothly with no play, and

then fully tighten the two

socket bolts (4).

Install so

that it is

not

twisted.

Insert so

that the

ground

surface

touches.

Place onto the

cutter sensor pin

(18).

Insert

from

top of

arm.

<For

-02-L1422,

L1826, L2230

specifications>

<For -00, -01,

-02-L2634,

L3442

specifications>

<Used with

-02-L1422, L1826,

L2230 s

ecifications>

6. ASSEMBLY

RH-9820 56

1. Bush cutter lever shaft

2. Cutter driving shaft

3. Guide block

4. Socket bolts [2 pcs]

(Temporarily tighten)

5. Bolts [2 pcs]

6. Nuts [2 pcs]

7. Extension spring

8. Spring hook pin U

9. Driving shaft presser

10. Spring hook pin D

11. O Ring

12. Bush cutter shaft assembly

13. Socket bolts [3 pcs]

14. Cylinder rod

15. Cylinder

16. Cylinder support shaft

17. Set screw

18. Cutter sensor pin

19. Set screw

20. Cutter arm slide block

21. Cutter arm pin

22. Set screws [2 pcs]

23. Cutter arm

24. Cutter arm shaft

25. Set screw collar

26. Set screws [2 pcs]

27. Set screws [2 pcs]

28. Cutter link

29. Cutter arm pin

30. Set screws [2 pcs]

31. Cutter lever

32. Cutter lever shaft

33. Set screw

34. Cylinder rod shaft

35. Set screw

36. Cutter arm pin

37. Set screws [2 pcs]

38. Hammer bracket assembly

39. Socket bolts [4 pcs]

40. Knob screw

(Temporarily tighten)

41. Cutter sensor assembly

42. Screws [2 pcs]

43. Eccentric pin

44. Knife garbage joint

45. Block stopper plate

46. Screw (Temporarily tighten)

47. Knife block holder

48. Socket bolt

(Temporarily tighten)

49. Knife bracket

50. Knife trash tube

51. Socket bolts [3 pcs]

(Temporarily tighten)

<-02-L1422, L1826, L2230

specifications only>

52. Hammer spacer

53. Set screw

A Apply adhesive (Threebond 1373B) to the outer circumference of the bush cutter lever shaft (1), and

then press-fit it within the press-fitting dimensions shown in the illustration so that the hole (A) is facing

directly downward.

B Assemble as shown in the

illustration.

C Tighten the Set screw (19)

so that the cutter sensor pin

(18) protrudes by about 1.0

±0.5 mm.

D Insert the cutter arm pin

(29) so that the “-” side

protrudes from the end of

the lever by about 1.0±0.3

mm.

0786B

0787B 0788B

(When at maximum retraction)

0789B

6. ASSEMBLY

RH-9820

6-2. Needle bar mechanism (1)

* Refer to “Adjusting the pressure of the needle bar gear block” on the next page.

1. Bearing

2. Bearing

3. Pulley flange

4. Screws [4 pcs]

5. Needle bar gear block

6. Needle bar gear nut

7. Screw

8. Gear nut cover

Push the needle bar gear block (5) in

as far as it will go. If it is not properl

inserted, oil leaks will occur.

pply sealant (Threebond 1212) to the oute

circumference of the bearing.

* Apply a small amount of sealant evenl

over the outer circumference. If the sealan

is not applied evenly over the whole

surface, oil leaks will occur.

0790B

6. ASSEMBLY

RH-9820 58

Adjusting the pressure of the needle bar gear block

Secure the needle bar gear nut (6), and then while pushing the needle bar gear block (5) with a force of 78.4 N,

tighten the screw (7).

NOTE:

If pressure is not applied, it will not be possible to adjust the turning center for the needle bar and looper

base, and this will cause problems with sewing such as skipped stitches.

0791B

6. ASSEMBLY

RH-9820

6-3. Zigzag mechanism

* Refer to the detailed descriptions on the next page for details on A and B in the illustration.

djust so

that there

is no play.

Refer to “7-3.

djusting the

zigzag base line

position” when

fully tightening.

0849B

djust so that

there is no

play.

lign the end

of the shaft

with the edge

of the arm.

djust so

that there

is no play.

Refer to “7-2. Adjusting the zigzag width (stitch width).”

Check the

direction of

installation.

6. ASSEMBLY

RH-9820 60

1. Zigzag connecting rod

assembly

2. Shoulder screw

3. Nut

4. Zigzag crank screw

5. Nut

6. Plain washer

7. Nut

(Temporarily tighten)

8. Zigzag eccentric pin

9. Needle position control

plate assembly

10. Wicks [2 pcs]

11. Wick

12. Felts [4 pcs]

13. Felt

14. Zigzag horizon link

15. Zigzag lever

16. Needle bar clamp

17. Socket bolt

18. Zigzag driving lever

19. Socket bolt (Temporarily

tighten)

20. Needle bar block collar

21. Zigzag fork

22. Zigzag fork support shaft

23. Set screw

24. Wick

25. Felts [6 pcs]

26. Cap4

27. Zigzag coaxial rock shaft

28. Zigzag crank

29. Spacer

30. Set screws [2 pcs]

31. Needle bar block bracket

32. Screw

A Install the two wicks (10) and the wick (11) as shown in the illustration. Push in the felt (13) so that the

wick will not pull out, and then push in the four felts (12) so that they do not protrude from the end of the

shaft. After this, install the socket bolt (17) so that it faces as shown in the illustration.

B Install the wick (24) as shown in the illustration.

Next, push the six felts (25) into the end of the shaft so that they do not protrude.

0851B

Groove

Insert into the groove

and then tie.

0850B

Groove

6. ASSEMBLY

RH-9820

6-4. Upper shaft mechanism

* Refer to the detailed descriptions on pages 62 and 63 for details on A to C in the illustration.

* For parts with screw stops, install so that the screw at the front in the turning direction is at the screw stop

position.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

0821B

Place the zigzag cam (24)

against the gear (25)

and then tighten. Refer to “7-29.

djustment of

the phase for

the take-up

roller cam”

when

assembling.

Place against

the bearing

collar (15) and

then tighten.

6. ASSEMBLY

RH-9820 62

1. Bearing

2. Bearing collar

3. Bearing

4. Upper shaft crank

5. Screw

6. Set screw

7. Upper shaft

8. Spacer

9. Bearing

10. Balance collar

11. Pinion

12. Set screws [2 pcs]

13. Set screws [2 pcs]

14. Bearing

15. Bearing collar

16. Internal retaining ring

17. Set screws [2 pcs]

18. Timing pulley assembly

19. Set screws [2 pcs]

20. Bearing

21. Bearing

22. Retaining ring C

23. Orthogonal shaft

24. Zigzag cam

25. Gear

26. Take-up cam roller

27. Pulley base

28. Set screws [2 pcs]

29. Set screws [2 pcs]

30. Set screws [2 pcs]

31. Set screws [2 pcs]

32. Set screws [2 pcs]

33. Pulley

34. Plain washers [3 pcs]

35. Screws [3 pcs]

A The outer circumferences of the bearings touch the sewing machine arm and the orthogonal shaft (23)

touch the inside of the bearings, so avoid removing them if possible.

If removing them, apply adhesive (Threebond 1373B) to the outer circumferences of the bearings, and

apply adhesive (Threebond 1401) to the inside of the bearing on the orthogonal shaft (23). Be sure to

wipe away any excess adhesive from the bearings at this time to avoid letting the adhesive get inside

the mechanism.

B Upper shaft and orthogonal shaft pressure adjustment

1) While pushing the upper shaft crank (4) in the direction of the arrow with a force of 98 N, push the bearing

collar (2) in the direction of the arrow with a force of 98 N, and then tighten the two set screws (12).

2) While pushing the upper shaft crank (4) in the direction of the arrow with a force of 29.4 N, push the end

of the balance collar (10) against the upper shaft crank (4) with a force of 29.4 N, and then tighten the two

set screws (13).

3) While pushing the end of the bearing collar (15) in the direction of the arrow with a force of 29.4 N, tighten

the two set screws (17).

0822B

0823B

0824B

6. ASSEMBLY

RH-9820

While pushing the pulley base(27) in the direction of the arrow with a force of 98 N, push the orthogonal shaft

(23) in the direction of the arrow with a force of 98 N, and then tighten the two set screws (28).

* This adjustment should be carried out immediately after applying adhesive to the orthogonal shaft (23) and to

the inside of the bearing (20) and (21).

C Hypoid gear installation adjustment

1) Set the gear (25) to the position shown in the illustration, and then tighten the two set screws (29). Align the

set screw (29) at the front in the turning direction with the screw stop on the orthogonal shaft (23). (The arrow

shows the direction of rotation.)

2) Align the marks on the pinion (11) and the gear (25) as shown in the illustration. Next, align the set screw (30)

at the front of the pinion (11) in the turning direction with the screw stop on the upper shaft (7), and then

provisionally tighten the two set screws (30) so that the pinion (11) can still move in the axial direction. (The

arrow shows the direction of rotation.)

3) Push the pinion (11) against the gear (25) and adjust the backlash so that it is 0.05 mm or less, and then fully

tighten the two set screws (30).

Adjust the backlash so that it is zero at the point where it is at a minimum when the gear (25) is turned a full

rotation.

NOTE:

If the amount of backlash is too small, the rotation torque will increase and this will cause the gear (25) to

become worn. Furthermore, if the amount of backlash is too large, the operating noise will increase, so be

sure to adjust the backlash correctly.

0825B

0826B

0827B

6. ASSEMBLY

RH-9820 64

6-5. Thread take-up mechanism

Insert the roller (4) into the groove in the thread take-up cam, and then insert the thread take-up L support

shaft (8).

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

1. Wick

2. Oil tube

3. Fastening band

4. Roller

5. Roller shaft

6. Set screw

7. Thread guide

8. Thread take-up L support shaft

9. Set screw

10. Felt

pply adhesive (3M DP-125

clear) and then install.

* Be sure to wipe away any

excess adhesive.

Application location

0829B

0828B

0830B

Insert the wick (1) into the groove,

wind it around and then tie it.

Tie.

Push in the felt (10) so that the wick

(1) touches the thread take up leve

support shaft (8).

0831B

6. ASSEMBLY

RH-9820

6-6. Needle bar mechanism (2)

* Refer to the detailed descriptions on pages 66 to 68 for details on A to F in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

Refer to “7-30.

djusting the

needle bar and

looper base

turning center”

when fully

tightening.

Refer to “7-6. Adjusting the

height of the needle bar” when

fully tightening.

Install so that

the needle bar

moves up and

down smoothly

and the amount

of play when

the needle bar

turns is as small

ossible.

0832B

6. ASSEMBLY

RH-9820 66

1. Needle bar bush U

assembly

2. Needle bar bush holder

base C

3. Socket bolts [3 pcs]

(Temporarily tighten)

4. Oil plate

5. Screws [2 pcs]

6. Oil stopper

7. Felt holder assembly

8. Socket bolts [2 pcs]

9. Slide block guide D

10. Socket bolts [5 pcs]

11. Needle bar crank

12. Set screws [3 pcs]

(Temporarily tighten)

13. Slide block

14. Crank rod unit

15. Screw (Left-hand thread)

16. Set screws [3 pcs] (Fully

tighten)

17. Needle bar clamp

18. Plain washer

19. Plain washer

20. Needle bar clamp

21. Needle bar assembly L

(Insert from above)

22. Needle bar guide collars

[2 pcs]

23. Set screws [2 pcs]

24. Needle bar guide washers

[2 pcs]

25. Needle bar guides [2 pcs]

26. Needle bar guide springs

[2 pcs]

27. Needle bar guide support

plates [2 pcs]

28. Screws [2 pcs]

29. Needle bar bracket screws

[2 pcs] (Temporarily tighten)

30. Needle guide A

31. Needle thread holder plate A

32. Tension spring

33. Shoulder screw

34. Needle

35. Set screw, SM

36. Slide block guide F

37. Socket bolts [4 pcs]

38. Needle bar guard

39. Socket bolts [2 pcs]

A Be careful of the position of the hole (a) when assembling.

B Make sure that the direction of the groove (b)

is correct when assembling.

Viewed from the front

C Align the white painted marks on the needle

bar block (c), needle bar guide washer (d) and

needle bar gear (e) before installing.

0833B

t face plate

0835B

0834B

Thread path

hole is at the

back.

White

painted

marks

6. ASSEMBLY

RH-9820

D Slide block guide D installation

1) Provisionally tighten the four socket bolts (10)

so that the slide block guide D (9) can still

move.

2) While pushing the slide block guide D (9) gently

from the face plate side toward the arm

installation surface, tighten the fifth socket bolts

(10) (f) from the side of the arm.

3) Fully tighten the four socket bolts (10).

Face plate side Right side

E Slide block guide F installation

1) Provisionally tighten the three socket bolts (37)

so that the slide block guide F (36) can still

move.

2) While pushing the slide block guide F (36)

gently from the face plate side toward the arm

installation surface, tighten the fourth socket

bolts (37) (g) from the side of the arm.

3) Fully tighten the three socket bolts (37).

Face plate side Right side

0836B

0837B

6. ASSEMBLY

RH-9820 68

F Needle bar crank forward/back adjustment

1) Align the screw stop of the needle bar crank

(11) with the side where the two set screws (12)

are on the upper shaft crank (h) (where the set

screw (12) (j) is), and then provisionally tighten

the two set screws (12) (i) and (j) so that the

needle bar crank (11) can still move back and

forth.

2) Pull out the crank rod unit (14) slightly.

3) Push the place indicated by to gently push

the Slide block (13) against slide block guide D

(9) so that the upper shaft crank (h) can still

turn easily, then tighten the set screw (12) (j)

through the hole in the side of the arm, and

then tighten the other set screw (12) (i)”. After

this, turn the upper shaft crank (h) and

provisionally tighten the third set screw (12) on

the opposite side.

* After assembling, check that the upper shaft

crank (h) turns easily. If the slide block (13) is

pushed too firmly, the upper shaft torque will

become stiffer.

0838B

6. ASSEMBLY

RH-9820

6-7. Y feed mechanism

* Refer to the detailed descriptions on pages 70 to 72 for details on A to F in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

NOTE:

After carrying out this procedure, be sure to adjust the Y home position while referring to “7-35. Adjusting

the needle up signal home position for the upper shaft and upper shaft motor”.

ssemble so that the

flanges are on the

inside.

Install so that the motor

connectors are facing as

indicated by the arrow.

Install the timing belt.

0839B

6. ASSEMBLY

RH-9820 70

1. Ball bearings [2 pcs]

2. Ball bearing stoppers

[2 pcs]

3. Screws [2 pcs]

4. Y position sensor

5. Screw

6. Ball bearings [2 pcs]

7. Retaining ring E

8. Y pulley shaft F

9. Y timing pulley assembly

10. Timing belt

11. Idler gear 40

12. Set screws [2 pcs]

13. Set screws [2 pcs]

14. Retaining rings C [2 pcs]

15. Ball bearings [2 pcs]

16. Retaining ring C

17. Y pulley shaft R

18. Y timing pulley assembly

19. Retaining ring C

20. Set screws [2 pcs]

21. Y pulley support

22. Socket bolts with washers

[2 pcs]

(Temporarily tighten)

23. Socket bolt

(Temporarily tighten)

24. Y driving shaft holder

25. Belt holder

26. Socket bolts [2 pcs]

27. Socket bolt

(Temporarily tighten)

28. Driving gear 20

29. Set screws [2 pcs]

30. Pulse motor Y assembly

31. Washers [4 pcs]

32. Socket bolts [4 pcs]

33. Y feed base

34. Socket bolts [3 pcs]

35. Y shaft

36. Y shaft holder

37. Socket bolt

38. Socket bolt

1) Push the Y pulley shaft F (8) and the Y timing

pulley assembly (9) in the direction of the arrow

so that there is no play in the parts, and then

tighten the two set screws (12).

2) Align the idler gear 40 (11) with the two set

screws (12) of the Y timing pulley assembly (9),

and then push it toward the side where the ball

bearing (6) are and tighten the two set screws

(13).

B Assemble as shown in the

illustration.

C Assemble as shown in the

illustration.

D Place the pulse motor Y

assembly (30) against the

idler gear 40 (11) so that

the amount of backlash is

0.03 mm or less, and then

tighten the four socket

bolts (32).

0840B

0843B

0842B

0841B

6. ASSEMBLY

RH-9820

E Belt tension adjustment

Repeat steps1 to 3 to adjust the belt tension until it

is within the ranges given below.

・ When using a new belt: 80 - 90 N

・ When reusing an old belt: 60 - 70 N

1) Loosen the two screws (b) of the Y pulley

support assembly (a).

2) Use the adjustment screw (c) to adjust the belt

tension.

3) Tighten the two screws (b) of the Y pulley

support assembly (a).

* Be sure to use a belt tension gauge to measure

the belt tension, and measure at the position

shown in the illustration.

* The belt tension gauge should be set to

measure a unit weight of 0.04 kg/m, a belt width

of 10 mm and a span length of 120 mm.

0844B

0845B

Measurement position

6. ASSEMBLY

RH-9820 72

F Standard installation of motor unit

Align the end (A) of the Y shaft holder (36) and

the reference line (B) on the Y shaft (35), and

then tighten the socket bolt (37).

Align the end (C) of the Y driving shaft holder

(24) and the reference line (D) on the Y shaft

(35), and then tighten the socket bolt (38).

0846B

0847B

0848B

0847B

Front

6. ASSEMBLY

RH-9820

6-8. Looper base mechanism

* Refer to the detailed descriptions on pages 75 to 78 for details on A to F in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

1093B

Refer to “7-24-2. Adjusting

the upper movable knife”.

“7-24-2.

djusting

the upper

movable

knife”.

Refer to “7-28.

djusting the position

of the lower thread

presser <-02

specifications only>”.

Refer to “7-24-3.

djusting the

position of the thread

trimmer lever

bracket”.

Refer to “7-11

djusting the

height of the

throat plate”.

Refer to “7-8.

djusting the

needle guard”.

Refer to “7-1. Adjusting the heights of the

spreaders and loopers” and “7-7. Adjusting

the clearance between the loopers and

needle”.

Longe

end

6. ASSEMBLY

RH-9820 74

1. Wick

2. Spreader cam link

3. Collar

4. Shoulder screw

5. Screw

(Temporarily tighten)

6. Spreader link base

7. Shoulder screw

8. Wick

9. Wick

10. Eye looper

11. Looper R

12. Spreader L

13. Spreader R

14. Spreader stopper L

15. Spreader stopper R

16. Screw [4 pcs]

(Temporarily tighten)

17. Spring guide shaft

18. Twist spring L

19. Twist spring R

20. Needle guard U

21. Plain washer

22. Socket bolt

(Temporarily tighten)

23. Felt

24. Wick

25. Looper link

26. Collar

27. Shoulder screw

28. Plain washer

29. Screw (Temporarily tighten)

30. Looper link clamp

31. Collar

32. Shoulder screw

33. Spreader driving cam

34. LS holder base

35. Holder presser shaft

36. Set screw

37. LS slide guide

38. Plain washer [2 pcs]

39. Nut

40. Screw (Temporarily tighten)

41. Thread trimmer lever

bracket

42. Pin

43. Support shaft base

44. Socket bolts [2 pcs]

45. Set screw

46. Spring

47. Thread guide plate

48. Spring guide shaft

49. Nut

50. Collar

51. L thread take-up spring

support

52. Screw (Temporarily tighten)

53. Thread take-up spring

54. L thread take-up spring

support

55. Screw (Temporarily tighten)

56. L thread take-up spring

support

57. Screw with washer

58. Vertical pin

59. Set screw

(Temporarily tighten)

60. Throat plate

61. Screw (Temporarily tighten)

<-00 and -01 specifications only>

62. Upper movable knife A

63. Screw (Temporarily tighten)

64. Upper movable knife base

65. Screw (Temporarily tighten)

<-02 specifications only>

66. Upper movable knife B

67. Screw (Temporarily tighten)

68. Spring

69. Screw

70. Nut

71. Lower thread presser J

assembly

72. Screw (Temporarily tighten)

73. Looper base oil plate assembly

74. Screws [2 pcs]

75. Wick

76. Felt

77. Fastening bands [2 pcs]

78. Gimp thread waste plate

79. Oil tube

80. Cord holder

81. Screw

<-00 specifications only>

82. Gimp thread guide C

83. Screw

<-01 and -02 specifications only>

84. Gimp thread clamp plate

85. Collar

86. Spring

87. Plain washer

88. Screw

89. Gimp thread guide C

<Gimp thread guide C-J for -02

specifications>

90. Screw

91. Ball bearings [2 pcs]

92. Looper base

93. Looper pulley assembly

94. Screw

6. ASSEMBLY

RH-9820

A Tie one end of the wick (1) once, and then push that end into the hole (a) in the support shaft base (43).

* Push in so that the knot does not protrude from the hole (a).

(Viewed from the front) (Viewed from the right)

1) Tie one end of the wick (8) once, and then push that end into the hole (b) in the LS holder base (34).

* Push in so that the knot does not protrude from the hole (b).

2) Tie the other end of the wick (8) to one end of the wick (9), and then wind them around the LS holder

base (34) as shown in the illustration.

* Tie the wicks twice to form the knot.

* Wind so that the knot is directly below the hole (c) and so that it does not protrude to the outside.

* Wind the wick (8) and the wick (9) so that they are positioned as shown in the illustration.

1185B

(Viewed from the left) (Viewed from the front)

1184B

6. ASSEMBLY

RH-9820 76

Hook the longer end of twist spring R (19) onto

spreader R (13), and pass the shorter end through

the hole in the LS holder base (34) as shown in the

illustration.

1) Push the felt (23) into the hole in the looper link

(25).

2) Tie the wick (24) around the looper link (25) as

shown in the illustration.

* Make a double knot in the wick (24), and

then cut off the excess length so that the

ends are 2 - 3 mm in length.

Hook the thread take-up spring (53) onto the hook

(d) of the L thread take-up spring support (54) as

shown in the illustration.

1) Hook the wick onto the hook (e) of the L thread

take-up spring support (56) as shown in the

illustration.

2) Raise the end of the hook (e) of the L thread

take-up spring support (56) so that it touches the

support shaft base (43), and then tighten the

screw with washer (57) at that position.

* This will prevent the wick from pulling away.

1096B

1094B 1095B

1097B

6. ASSEMBLY

RH-9820

1) Tie the wick (75) around the wick release plate (78) as shown in the illustration.

* Make a double knot in the wick, and then set the wick so that the distance from the knot to the end is

as shown in the illustration, and cut off any excess length.

2) Install the felt (76) to the wick release plate (78) with the two cable ties (77).

* Cut the ends of the two cable ties (77) so that a length of 0 to 2 mm remains.

(Viewed from the front) (Viewed from the right)

H Pass the wick (9) and the wick (75) through the

oil tube (79) as shown in the illustration, and

then pass them through the hole (f).

I Push the five wicks (g) into the hole (h) as

shown in the illustration, and then install the

cord presser (80) and secure it by tightening

the screw (81).

1186B

1187B 1188B

6. ASSEMBLY

RH-9820 78

1) Apply adhesive (Threebond 1373B) to the

outer circumferences of the two ball bearings

(91).

2) Insert the two ball bearings (91) into the top

and bottom of the looper base mounting hole

(i) in the bed.

* Insert the two ball bearings (91) securely

until their surfaces (j) are fully touching.

* Wipe away any excess adhesive at this

time.

3) Insert the looper base assembly (k).

K Looper base pressure adjustment

1) Gently screw the looper pulley assembly (93)

onto the threaded section (l) of the looper base.

2) Secure the looper pulley assembly (93) so that

it will not turn, and then push the back of the

looper base (92) at a point 20 mm to the left of

center with a force of 70 N.

3) Tighten the screw (94).

1098B

1099B

1100B

1101B

6. ASSEMBLY

RH-9820

6-9. Needle bar rocking mechanism

* Refer to the detailed descriptions on pages 80 to 84 for details on A to G in the illustration.

0922B

6. ASSEMBLY

RH-9820 80

1. Bearing

2. Set screws [2pcs]

(Temporarily tighten)

3. Set screw collar

4. Bearing

5. Internal retaining ring

6. Socket bolt (Temporarily

tighten)

7. Vertical shaft timing pulley

U assembly

8. Timing belt

9. Driving looper shaft

assembly

10. Rubber cap

11. Internal retaining ring

12. Bearing

13. Internal retaining ring

14. Tension pulley U

15. Retaining ring C

16. Timing pulley holder

assembly

17. Socket bolts with washers

[2 pcs]

18. Theta M pulley assembly

19. Set screws [2 pcs]

20. Pulse motor assembly R

21. Socket bolts with washers

[4 pcs]

22. Timing belt

23. Motor stopper

24. Socket bolts [2 pcs]

25. Internal retaining ring

26. Bearing

27. Internal retaining ring

28. Tension pulley

29. Retaining ring C

30. Timing pulley holder assembly

31. Socket bolts with washers

[2 pcs]

A Push the driving looper shaft

assembly (9) from the lowered to

the raised position, then push the

set screw collar (3) down to clamp

the bearing (4), and then tighten

the two set screws (2).

B Place the timing belt (8) onto the needle bar gear block (a)

and the vertical shaft timing pulley U assembly (7).

C Place the timing belt (22) onto the looper base

(b), driving looper shaft assembly (9) and the

theta M pulley assembly (18).

D Align the screw (c) at the left side of the theta

M pulley assembly (18) with the screw stop on

the driving looper shaft assembly (9). In

addition, set the clearance between the theta M

pulley assembly (18) and pulse motor

assembly R (20) to 2 mm.

0923B 0924B

0926B

0925B

6. ASSEMBLY

RH-9820

E Belt tension adjustment for needle bar gear block belt

1) Place the timing belt (8) onto the needle bar

gear block (a) and the vertical shaft timing

pulley U assembly (7), and then provisionally

install tension pulley U (14) so that it is gently

pressing against the timing belt (8).

2) Pull tension pulley U (14) in the direction of the

arrow to adjust the belt tension so that it is

within the ranges given below.

・ When using a new belt: 80 - 90 N

・ When reusing an old belt: 60 - 70 N

* Be sure to use a belt tension gauge to measure

the belt tension, and measure at the position

shown in the illustration.

* The belt tension gauge should be set to

measure a unit weight of 0.04 kg/m, a belt width

of 10 mm and a span length of 219 mm.

NOTE:

If you do not have a belt tension gauge, adjust

so that the amount of deflection is

approximately 3 mm when a pressure of 5 N is

applied to the middle of the span (the

measurement position shown in the illustration).

Measurement position

0927B

6. ASSEMBLY

RH-9820 82

F Belt tension adjustment for driving looper belt

Attach the timing belt (22) so that the distance

from reference line (A) (for installation: 65 °

position) on the looper base (b) to reference line

(B) on the bed is 5 mm or less when (d) of the

theta M pulley assembly (18) is touching against

the motor stopper (23), and then adjust tension

pulley (28) to the appropriate tension.

1) Place the timing belt (22) onto the looper base

(b), driving looper shaft assembly (9) and theta

M pulley assembly (18), and then provisionally

install the tension pulley (28) so that it is gently

pressing against the timing belt (22).

2) Pull the tension pulley (28) in the direction of

the arrow to adjust the belt tension so that

it is within the ranges given below.

・ When using a new belt: 80 - 90 N

・ When reusing an old belt: 60 - 70 N

3) Check that the mechanism is at the <Standard

installation when belt is tensioned> position

given above at this time. If the reference lines

are more than 5 mm apart, readjust the

mechanism.

* Be sure to use a belt tension gauge to measure

the belt tension, and measure at the position

shown in the illustration.

* The belt tension gauge should be set to

measure a unit weight of 0.04 kg/m, a belt width

of 10 mm and a span length of 136 mm.

NOTE:

If you do not have a belt tension gauge, use a

push-pull gauge to push tension pulley (28) in

the direction of the arrow with a force of 65

N, and then tighten the two socket bolts with

washers (31).

Measurement

position

1197B

0928B

0929B

Measurement position

6. ASSEMBLY

RH-9820

G Looper base and needle bar gear block position adjustment

1) Loosen the socket bolt (6) of the vertical shaft

timing pulley U assembly (7).

2) Turn the needle bar gear block (a) until the

socket bolt (6) of vertical shaft timing pulley U

assembly (7) is toward the front when the

thread guide (e) on the needle bar is at the

back.

3) Turn the looper base (b) until reference line (B)

on the bed is aligned with reference line (C) (0°:

left side) on the looper base.

4) Install the positioning gauge (f) to the end of

the needle bar gear block (a) with the screw

(g). (The thread guide (e) on the needle bar

should be all the way in [on the right side in

the illustration].)

* Install the positioning gauge (f) so that it is

pushed up to the top-left.

5) Turn the needle bar gear block (a) in the

direction of the arrow until the positioning

gauge (f) touches the end (h) of the cutter

driving bushing.

* The underside of the positioning gauge (f)

should touch the end (h).

0930B

0931B

1195B

1196B

6. ASSEMBLY

RH-9820 84

6) Push the vertical shaft timing pulley U assembly

(7) up gently until it touches the bearing (1),

and then tighten the socket bolt (6).

0932B

6. ASSEMBLY

RH-9820

6-10. Lower shaft mechanism

* Refer to the detailed descriptions on pages 86 to 89 for details on A to C in the illustration.

0933B

Press-fit into the arm

after assembling.

Press-fit into the arm

after assembling.

6. ASSEMBLY

RH-9820 86

1. Bearing

2. Bearing collar

3. Bearing

4. Bearing collar

5. Bearing

6. Lower shaft tension

pulley A

7. Lower shaft tension

pulley B

8. Socket bolts with

washers [3 pcs]

9. Lower shaft

10. Set screws [2 pcs]

11. Set screws [2 pcs]

12. Set screws [2 pcs]

13. Internal retaining ring

14. Bearings [2 pcs]

15. Internal retaining ring

16. Idler pulley

17. Collar

18. Idler pulley shaft

19. Set screw

20. Bearings [2 pcs]

21. Retaining ring C

22. Tension pulley collar

23. Socket bolt (Temporarily tighten)

24. Timing belt (For lower shaft -

upper shaft motor) (Temporarily

tighten)

25. Timing belt

(For upper shaft - lower shaft)

26. Lower shaft cover assembly

27. Screws [2 pcs]

28. Lower shaft cam

29. Set screws [2 pcs]

(Temporarily tighten)

A Lower shaft pressure adjustment

1) Set so that the amount of protrusion is 24.8 mm, and then tighten the two set screws (10) of the bearing

collar (2) against the lower shaft (9). (This is to prevent the shaft from protruding when installing the lower

shaft cam (28).)

2) While pushing the lower shaft (9). in the direction of arrow (A) with a force of 29.4 N, tighten the two set

screws (11) of the bearing collar (4).

3) Push the back of lower shaft tension pulley B (7) gently in the direction of arrow (B) and tighten the two

set screws (12).

0934B

6. ASSEMBLY

RH-9820

B Belt (upper shaft - lower shaft) installation and belt tension adjustment

1) Place the timing belt (24) (for lower shaft –

upper shaft motor) into the groove (C) in lower

shaft tension pulley B (7).

2) Loosen the socket bolt (23) of the tension

pulley assembly (a).

3) Place the timing belt (25) (for upper shaft -

lower shaft) onto the upper shaft timing pulley

(b), idler pulley (16), lower shaft tension pulley

B (7) and tension pulley assembly (a).

4) Use a spanner to turn the hexagonal part (c) of

the eccentric shaft of the tension pulley

assembly (a) in the direction of the arrow to

adjust the belt tension to within the ranges

given below, and then tighten the socket bolt

(23).

・ When using a new belt: 170 - 190 N

・ When reusing an old belt: 140 - 170 N

* Be sure to use a belt tension gauge to measure

the belt tension, and measure at the position

shown in the illustration.

* The belt tension gauge should be set to

measure a unit weight of 0.04 kg/m, a belt width

of 15 mm and a span length of 198 mm.

NOTE:

If you do not have a belt tension gauge, adjust so

that the amount of deflection is approximately 2

mm when a pressure of 5N is applied to the middle

of the span (the measurement position shown in

the illustration).

Measurement position

0935B

0936B

0937B

6. ASSEMBLY

RH-9820 88

1) Turn the upper shaft pulley (d) to the needle up

stop position.

(Align the pulley groove (E) with the arm

reference line (D).)

2) Remove the face plate (e) and the rubber cap

(f), and then insert the accessory pin (g) into

the groove (G) of the crank from the hole (F) in

the arm to secure the upper shaft. (Upper shaft

0° position)

3) Hold the timing pulley (h) of the upper shaft

motor still with your hand so that the screw on

the timing pulley (h) is in the position shown in

the illustration, and then place the timing belt

(25) (for upper shaft - lower shaft) onto the

upper shaft timing pulley (b), idler pulley (16),

lower shaft tension pulley B (7) and tension

pulley assembly (a).

4) Use a spanner to turn the hexagonal part (c) of

the eccentric shaft of the tension pulley

assembly (a) in the direction of the arrow to

adjust the belt tension to within the ranges

given below, and then tighten the socket bolt

(23).

・ When using a new belt: 170 - 190 N

・ When reusing an old belt: 140 - 170 N

* Be sure to use a belt tension gauge to measure

the belt tension, and measure at the position

shown in the illustration.

* The belt tension gauge should be set to

measure a unit weight of 0.04 kg/m, a belt width

of 15 mm and a span length of 198 mm.

0941B

0938B

0939B

0940B

Measurement position

1198B

6. ASSEMBLY

RH-9820

C Lower shaft provisional installation position

* This position is the provisional position for the lower shaft until the procedure in “7-5. Adjusting the looper

stroke” is carried out.

1) Turn the upper shaft pulley (d) to the needle up

stop position.

(Align the pulley groove (E) with the arm

reference line (D).)

2) Align the index mark (I) of the lower shaft cam

(28) with the hole (H) in the bed.

3) Push the lower shaft cam (28) against the end

of the bearing collar (2), and then provisionally

tighten the two set screws (29).

Should be no clearance. 0941B

0942B

0943B

6. ASSEMBLY

RH-9820 90

6-11. Looper mechanism

* Refer to the detailed descriptions on the next page for details on A in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

1. Felt

2. Roller

3. Roller shaft

4. Set screw

5. Wick

6. Wick

7. Oil tube

8. Wick

9. Oil tube

10. Looper tube clamp B

11. Screw

12. Looper tube clamp A

13. Screw

14. Looper driving plate

15. Shafts [2 pcs]

16. Set screws [2 pcs]

17. Looper lever

18. Looper lever shaft

19. Set screws [2 pcs]

20. Looper driving shaft bracket

21. Looper driving shaft

22. Socket bolt

23. Screw (Temporarily tighten)

Check that

the looper

driving plate

(14) turns

smoothly

through 360°

with no play.

1076B

Refer to “7-4. Adjusting

the needle and looper

timing”.

6. ASSEMBLY

RH-9820

A Install the wicks as shown in the illustration.

(Viewed from directly above)

(Viewed from the left) (Viewed from the front)

1104B

1103B

1102B

・ Tie in two knots.

・ Cut the ends at a

length 2 mm from the

knots.

Fold twice and pass

through the hole.

・ Tie in two knots.

・ Cut the ends at a

length 2 mm from the

knots.

・ Tie once.

・ Pass the knot through

the tube.

・ Tie once.

・ Pass the knot through

the tube.

(Clearance)

(Viewed from underneath)

6. ASSEMBLY

RH-9820 92

6-12. Spreader mechanism

* Refer to the detailed descriptions on the next page for details on A and B in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

1. Felt

2. Spreader tube clamp

3. Screw

4. Wick

5. Oil tube

6. Fastening bands [2 pcs]

7. Wick

8. Retaining ring C

9. Shaft

10. Retaining ring C

11. Shaft

12. Set screws [2 pcs]

13. Slide blocks [2 pcs]

14. Spreader lever A

15. Spreader link shaft

16. Spreader lever B

17. Spreader lever shaft

18. Set screws [2 pcs]

19. Eccentric pin

20. Screw (Temporarily tighten)

21. Plain washers [2 pcs]

22. Screws [2 pcs] (Temporarily tighten)

23. Screw (Fully tighten)

The larger

bevelled

surface should

be on the

inside.

Refer to “7-10.

djusting the

spreader timing”.

1105B

6. ASSEMBLY

RH-9820

A Install the wicks as shown in the illustration.

B Align the top of the spreader link base (b) with the reference line (a) on the spreader link shaft (15), and

then tighten the screw (23).

1027B

1028B

Tie.

Cut at 0 - 2 mm.

Tighten so that the

two fastening bands

(6) are not lifted up.

Set to 1

mm or less.

*1: Cut the ends at a

length 4 mm from

the knots.

6. ASSEMBLY

RH-9820 94

6-13. Upper thread trimmer mechanism

* Install in the positions shown in the illustration.

1. Cylinder assembly

2. Socket bolts [2 pcs]

3. Hammer

4. Hammer guide plate

5. Socket bolts [2 pcs]

6. Cylinder setting plate

7. Socket bolts [2 pcs]

0985B

(When at

maximum

extension)

Clearance：

6. ASSEMBLY

RH-9820

6-14. Threading mechanism

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

Tighten the shoulder screw (11)

followed by the nut (12) so that the

gimp thread take-up driving plate (9)

and the gimp thread tale-up plate (10)

move smoothly with no play.

0944B

Make sure the direction is correct.

Make sure the direction is

correct.

6. ASSEMBLY

RH-9820 96

1. 2 pedal thread guide pipe

2. Screws [2 pcs]

3. Pipe clamp plate

4. Screws [2 pcs]

5. Thread guide pipe

6. Thread guide pipe support

7. Screw

<-01 specifications only>

8. Washer

9. Gimp thread take-up

G-E plate

10. Gimp thread take-up guide

plate

11. Shoulder screw

12. Nut

13. Springs [2 pcs]

14. Gimp thread guide

15. Screw

16. Gimp thread take-up

G-holder

17. Socket bolts [2 pcs]

<-00 and -02 specifications only>

18. Gimp thread guide J

19. Socket bolts [2 pcs]

<-02 specifications only>

20. O Ring [2 pcs]

21. Retaining ring E

22. Solenoid

23. Screws [2 pcs]

24. Gimp thread shaft

25. Set screws [2 pcs]

26. Tension disc

27. Gimp thread clamp

28. Screws [2 pcs]

29. Gimp thread clamp plate

30. Socket bolts [2 pcs]

31. Thread guide pipe

32. Thread guide pipe support

33. Screw

6. ASSEMBLY

RH-9820

6-15. Feed base mechanism

* Refer to the detailed descriptions on pages 102 and 103 for details on A to K in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

6-15-1. Feed base

0986B

＊2

＊1

＊3

＊2

＊3

6. ASSEMBLY

RH-9820 98

1. Retaining ring C [4 pcs]

2. Ball bearings [4 pcs]

3. Retaining ring C [4 pcs]

4. Retaining ring C

5. Ball bearing

6. Retaining ring C

7. Y bearing

8. Y guide shaft

9. Set screws [2 pcs]

10. Clamp lever shaft

11. Clamp driving lever

12. Screw (Temporarily tighten)

13. Crank lever B

14. Socket bolt

15. Clamp lever shaft

16. Clamp driving lever

17. Screw (Temporarily tighten)

18. Crank lever B

19. Socket bolt

20. Cylinder rod

21. Auxiliary clamp

connecting rod

22. Retaining ring E

23. Cylinder rod pin

24. Retaining ring E

25. Joint [2 pcs]

26. Auxiliary clamp S holder

27. Retaining ring E

28. Pin

29. Retaining ring E

30. Cylinder

31. Screw

32. Washer

33. Retaining ring C

34. Spring hook

35. Clamp cylinder rod

36. Air bolster

37. Joint

38. Cylinder

39. Clamp cylinder support

40. Set screw

41. Retaining ring E

42. Cylinder rod pin

43. Retaining ring E

44. Spring

45. Spring hook

46. Clamp cylinder rod

47. Air bolster

48. Joint

49. Cylinder

50. Clamp cylinder support

51. Set screw

52. Retaining ring E

53. Cylinder rod pin

54. Retaining ring E

55. Spring

56. Cylinder screw

57. Joint [2 pcs]

58. Opening cylinder rod

59. Opening driving lever L

assembly

60. Retaining ring E

61. Cylinder rod pin B

62. Retaining ring E

63. Fulcrum lever plate

64. Slide block

65. Rocker lever

66. Washer

67. Retaining ring E

68. Cylinder

69. Retaining ring E

70. Shoulder screw [3 pcs]

71. Cylinder screw

72. Joints [2 pcs]

73. Opening cylinder rod

74. Opening driving lever R

assembly

75. Retaining ring E

76. Cylinder rod pin B

77. Retaining ring E

78. Fulcrum lever plate

79. Slide block

80. Rocker lever

81. Washer

82. Retaining ring E

83. Cylinder

84. Retaining ring E

85. Shoulder screw [3 pcs]

86. Speed nut

87. Screw (Temporarily tighten)

88. Stopper plate

89. Opening stopper plate

90. Washer

91. Screw (Temporarily tighten)

92. Speed nut

93. Screw (Temporarily tighten)

94. Stopper plate

95. Opening stopper plate

96. Washer

97. Screw (Temporarily tighten)

98. Spring

99. Nut (Temporarily tighten)

100. Bolt

101. Opening cylinder stopper

102. Spring washer

103. Screws [2 pcs]

104. Nut (Temporarily tighten)

105. Bolt

106. Opening cylinder stopper

107. Spring washer

108. Screws [2 pcs]

109. Plate guide B

110. Flat screws [3 pcs]

111. Plate guides A [5 pcs]

112. Flat screws [10 pcs]

113. Thread trimmer cylinder

support plate

114. Nut

115. Nut

116. Thread trimmer cylinder claw

117. Joint

118. Sensor

119. Cylinder

120. Socket bolts [2 pcs]

121. Collar

122. Retaining ring C

123. Gimp thread take-up guide

shaft

124. Set screw

125. Feed base plate spring

126. Screws [2 pcs]

Route the air tubes and harnesses

here. (Refer to pages 99 - 101.)

127. Feed base cover L

128. Flat screws [6 pcs]

129. Plate presser

130. Bending washer

131. Shoulder screw

132. Feed base cover R

133. Flat screws [6 pcs]

134. Plate presser

135. Bending washer

136. Shoulder screw

137. Feed base cover U

138. Truss screws [2 pcs]

＊1：Refer to “7-18. Adjusting the work clamp lift amounts”.

＊2：Refer to “7-21. Adjusting the cloth opening amounts”.

＊3：Refer to “7-20. Adjusting the positions of the work clamp plates”.

<-02 specifications only>

<-01 and -02 specifications only>

<-01 specifications only>

6. ASSEMBLY

RH-9820

Routing the air tubes and harnesses <-00 specifications>

The air tubes and harnesses are numbered as shown in the illustration. Check the number of each air tube and

harness to make sure that they are routed correctly as shown in the illustration.

0987B

6. ASSEMBLY

RH-9820 100

Routing the air tubes and harnesses <-01 specifications>

The air tubes and harnesses are numbered as shown in the illustration. Check the number of each air tube and

harness to make sure that they are routed correctly as shown in the illustration.

0988B

6. ASSEMBLY

RH-9820

101

Routing the air tubes and harnesses <-02 specifications>

The air tubes and harnesses are numbered as shown in the illustration. Check the number of each air tube and

harness to make sure that they are routed correctly as shown in the illustration.

0989B

6. ASSEMBLY

RH-9820 102

A Turn the feed base (a) upside down. Place the

four retaining rings C (1) onto one side of the

four ball bearings (2), then apply adhesive

(Threebond 1373B) to the four ball bearings

(2) and then insert them into the four holes (b).

* Wipe away any excess adhesive at this

time.

* Install so that the layout of the balls (c) is in

an “X” pattern on the installation surface as

shown in the illustration.

B Place the retaining rings C (4) onto one side of

the ball bearing (5), then apply adhesive

(Threebond 1373B) to the ball bearing (5) and

then insert it into the Y bearing (7).

* Wipe away any excess adhesive at this

time.

* Install so that the layout of the balls (d) is in

an “X” pattern on the installation surface as

shown in the illustration.

C Assemble as shown in the illustration.

D Assemble as shown in the illustration.

E Assemble as shown in the illustration.

F Assemble as shown in the illustration.

0995B

0990B

0991B

0997B

0994B

0996B

(When at maximum retraction)

(最縮時)

0992B

0993B

Installation

surface

Installation

surface

6. ASSEMBLY

RH-9820

103

Set the clamp lever shaft (10) so that the amount

of protrusion at the end is as shown in the

illustration, then assemble crank lever B (13) so

that there is no clearance between it and the inside

of the clamp lever shaft (10), and then tighten the

socket bolt (14).

(The left side is the same.)

(Right side )

H Assemble while referring to the finished assembly diagram shown below.

(Left side ) (Right side )

I <For -02 specifications only>

Install to the feed base (a) as shown in the illustration below.

J <For -02 specifications only>

Install so that the centers of the pin holes (e)

and (f) are at the distance shown in the

illustration.

K <For -01 and -02 specifications only>

Install at the distance shown in the illustration.

0999B

1000B

1002B

1001B

(When at maximum retraction)

(Viewed from underside)

0998B

6. ASSEMBLY

RH-9820 104

6-15-2. X feed shaft holder

* Refer to the detailed descriptions on pages 105 and 106 for details on A to D in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

* Apply the grease specified by Brother (Shin Lube EJ manufactured by Nippon Steel Chemical

Corporation) in the places indicated by .

1. Ball bearings [4 pcs]

2. Ball bearing stoppers

[4 pcs]

3. Screws [4 pcs]

4. X feed guide shaft B

5. X feed guide shaft A

6. Gears [2 pcs]

7. Socket bolts [4 pcs]

8. Set screw

(Temporarily tighten)

9. X feed shaft holder N

10. Washers [2 pcs]

11. Socket bolts [2 pcs]

(Temporarily tighten)

12. Set screw

(Temporarily tighten)

13. X feed shaft holder S

14. Washers [2 pcs]

15. Socket bolts [2 pcs]

Install the feed base to the bed here.

16. Y feed guide shafts [2 pcs]

17. Set screws [4 pcs]

18. Set screws (8, 12) [2 pcs] (Fully tighten)

19. Set screws (11, 15) [4 pcs] (Fully tighten)

<-01 specifications only>

20. Cylinder screw

1003B

6. ASSEMBLY

RH-9820

105

1) Apply adhesive (Threebond 1373B) to the four

ball bearings (1).

2) Insert the four ball bearings (1) into the holes in

the bed so that the layout of the balls (a) is in

an "X" pattern on the base of the bed as shown

in the illustration.

3) While pushing the four ball bearing stoppers (2)

onto the base of the bed, tighten the four

screws (3).

* At this time, insert the projections (b) of the

four ball bearing stoppers (2) into the

grooves (c) and check that the ball bearing

stoppers (2) are flush with the bed surface.

Install the two gears (6) to X feed shaft holder N

(9) so that the gear (6) with the shorter distance

between the thread hole and the edge is on the

right.

* While pushing the two gears (6) in the

direction of the arrow at this time,

tighten the four socket bolts (7).

1004B

1005B

(Viewed from directly to

the left)

(Viewed from the side)

1108B

Base of

bed

6. ASSEMBLY

RH-9820 106

1) Place the feed base unit onto the bed.

2) Insert the Y feed guide shaft (16) on the left

side into the hole (d) in the bed so that the end

with the screw stop goes in first, and pass it

through the two ball bearings (1).

3) Align the screw stop on the Y feed guide shaft

(16) with the screw hole in X feed shaft holder

N (9).

4) Align the end of the Y feed guide shaft (16) with

the end of X feed shaft holder N (9), and then

tighten the two set screws (17).

5) Install the Y feed guide shaft (16) on the right

side also by following steps 2 to 4 above.

D <For -01 specifications only>

Install the Cylinder screw (20) in the position shown in the illustration.

1006B

1007B

lign the edges.

6. ASSEMBLY

RH-9820

107

6-16. X feed mechanism

* Refer to the detailed descriptions on the next page for details on A to C in the illustration.

* Apply the grease specified by Brother (Shin Lube EJ manufactured by Nippon Steel Chemical

Corporation) in the places indicated by .

1. Internal retaining rings [2 pcs]

2. Bearings [2 pcs]

3. X idler gear shaft

4. Idler gear

5. Set screws [2 pcs]

6. Idler gear

7. Set screws [2 pcs]

(Temporarily tighten)

8. Feed gear

9. Set screws [2 pcs]

10. Pulse motor X assembly

11. Plain washers [4 pcs]

12. Socket bolts [4 pcs]

13. X motor support

14. Socket bolts [3 pcs]

Install so that the motor

connectors are facing as

indicated by the arrow.

pply adhesive to the

outer circumferences of

the two bearings (2) and

then install.

0963B

pply adhesive to the

outer circumferences of

the two bearings (2) and

then install.

Install the X idler gear

shaft (3) so that there is

no play in the axial

direction and so that it

turns smoothly.

6. ASSEMBLY

RH-9820 108

A Assemble as shown in the

illustration.

B Place the pulse motor X assembly (10) against the idler

gear (4) so that the amount of play is 0.02 mm or less

within a range of 130° as shown in the illustration, and

then tighten the two set screws (9).

C Standard installation of motor unit (idler gear adjustment)

1) Place the feed base (c) onto the bed (b) so that

Y feed guide shaft (a) is positioned in the center

of the hole in the front of the bed (b).

2) Loosen the two set screws (7) of the idler gear

(6) in order to engage the X rack (e) and the

idler gear (6) while the X rack (d) and the idler

gear (4) are engaged in the standard position.

3) Set so that the screw stop (A) of the pulse

motor X assembly (10) and the two set screws

(9) of the feed gear (8) are in the positions

shown in the illustration.

4) While pushing the idler gear (4) and idler gear

(6) to engage them with the X racks (d) and (e)

at opposite sides, install the motor unit (f).

5) Tighten the two set screws (7) so that there is

no thrust play in the idler gear (6).

* If only removing the motor unit (f), steps 2 and

5 in the adjustment procedure for the idler gear

(6) can be omitted. (If carrying out any

disassembly or assembly which changes the

positions of the X racks or if re-adjusting the

backlash, carry out the full procedure.)

0964B

0966B

0967B

0968B

0965B

6. ASSEMBLY

RH-9820

109

6-17. Lower thread tension mechanism

* Refer to the detailed descriptions on the next page for details on A in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

Refer to “7-32.

Adjusting the lower

thread loosening

amount”.

Refer to “7-23.

djusting the lower thread feeding

amount <-01 specifications only>”.

0969B

6. ASSEMBLY

RH-9820 110

[-00 and -02 specifications only]

1. Spring pin

2. Stopper

3. Lower thread release plate

4. Spring

5. Retaining ring C

6. Lower thread guide B

7. Screws [2 pcs]

8. Lower thread guide A

9. Screws [2 pcs]

10. Tension discs [2 pcs]

11. Tension disc presser

12. Spring

13. Washer

14. Tension nut

15. Tension stud

16. Tension release pin

17. Nut (Temporarily tighten)

18. Solenoid cushion

19. Washer

20. Solenoid shaft

21. Solenoid

22. Plain washers [2 pcs]

23. Spring washers [2 pcs]

24. Bolts [2 pcs]

25. Solenoid setting plate

26. Plain washers [2 pcs]

27. Socket bolts [2 pcs]

28. (Not used for -00 and -02

specifications)

29. (Not used for -00 and -02

specifications)

30. Lower thread guide adjusting plate

31. Socket bolts [3 pcs]

[-01 specifications only]

1. Spring pin

2. Stopper

3. Lower thread take-up guide

lever

4. Spring

5. Retaining ring C

6. Lower thread guide B

7. Screws [2 pcs]

8. Lower thread guide A

9. Screws [2 pcs]

10. Tension discs [2 pcs]

11. Tension disc presser

12. Spring

13. Washer

14. Tension nut

15. Tension stud

16. Tension release pin

17. Nut (Temporarily tighten)

18. Solenoid cushion

19. Washer

20. Solenoid shaft

21. Solenoid

22. Plain washers [2 pcs]

23. Spring washers [2 pcs]

24. Bolts [2 pcs]

25. Solenoid setting plate

26. Plain washers [2 pcs]

27. Socket bolts [2 pcs]

28. Lower thread guide C

29. Screws [2 pcs]

30. Lower thread guide adjusting

plate

31. Socket bolts [3 pcs]

[For -00 and -02 specifications]

Insert the longer end of the spring (4) into the

spring pin (1), and insert the shorter end into the

notch in the lower thread release plate (3).

[-01 specifications]

Insert the longer end of the spring (4) into the spring

pin (1), and insert the shorter end into the notch in the

lower thread take-up guide lever (3).

0970B

6. ASSEMBLY

RH-9820

111

6-18. Upper shaft motor mechanism

* Refer to the detailed descriptions on pages 112 to 114 for details on A to C in the illustration.

NOTE:

・ Check that the Y feed motor assembly and the pulse motor R assembly are installed before carrying out

this procedure.

If they are not installed, install them first.

・ After carrying out the procedure in “C Standard installation of upper shaft motor unit and belt tension

adjustment”, be sure to carry out the adjustments in “7-35. Adjusting the needle up signal home position for

the upper shaft and upper shaft motor” and “7-36. Adjusting the upper shaft stop position”.

1. Motor assembly

2. Socket bolts [5 pcs]

3. Timing pulley

4. Set screws [2 pcs]

5. Motor holder

6. Socket bolts with washers [3 pcs]

7. Motor cover

8. Belt guide

9. Screws [2 pcs]

0852B

6. ASSEMBLY

RH-9820 112

A Install so that the cord (a) is in the position

shown in the illustration.

B Align the screw at the front of the timing pulley

(3) in the direction of rotation with the screw

stop on the motor shaft (b), and then tighten

the screw so that the shaft projects by 0.5 - 1.0

mm.

Screw stop

side

C Standard installation of upper shaft motor unit and belt tension adjustment

1) With the machine head tilted back, hold the

upper shaft motor unit (c) at the front, and place

the positioning pin (e) at the rear of the

machine head into the slot (A) in the motor

holder (d).

2) Provisionally screw in the socket bolt with

washer (f) until it is almost fully tightened.

3) Return the machine head to its original position.

4) Provisionally screw in the two remaining socket

bolts with washers (g) at the back of the

machine head until they are almost fully

tightened, and then place the motor on the

lower shaft side.

5) Place the belt (h) onto the lower shaft timing

pulley (i) and the motor pulley (j).

6) Insert a screwdriver into the gap between the

motor holder (d) and the bed (k) and move the

upper shaft motor unit (c) to the left to adjust

the tension of the belt (h) to within the range

given below.

• When using a new belt: 130 - 140 N

• When reusing an old belt: 90 - 100 N

7) Tighten the two socket bolts with washers (g).

8) Tilt back the machine head and fully tighten the

socket bolt with washer (f) at the front.

* Be sure to use a belt tension gauge to measure

the belt tension, and measure at the position

shown in the illustration.

* The belt tension gauge should be set to

measure a unit weight of 0.04 kg/m, a belt width

of 15 mm and a span length of 92 mm.

0855B

0853B 0854B

Measurement position

6. ASSEMBLY

RH-9820

113

1) Remove the face plate (l) and the rubber cap

(m), and then insert the accessory pin (n) into

the groove (C) in the upper shaft crank from the

hole (B) in the arm to stop the upper shaft from

turning. (Upper shaft 0° position)

2) Remove the motor cover (7) if it is installed to

the upper shaft motor unit (c).

3) With the machine head tilted back, hold the

upper shaft motor unit (c) at the front, and then

place the belt (h) onto the motor pulley (j) so

that the D cut section (D) of the encoder is

facing directly to the right.

4) Place the positioning pin (e) at the rear of the

machine head into the slot (A) in the motor

holder (d).

5) Provisionally screw in the socket bolt with

washer (f) until it is almost fully tightened.

6) Return the machine head to its original position.

(Continued on next page)

0975B

6. ASSEMBLY

RH-9820 114

7) Provisionally screw in the two remaining socket

bolts with washers (g) at the back of the

machine head until they are almost fully

tightened, and then place the motor on the

lower shaft side.

8) Insert a screwdriver into the gap between the

motor holder (d) and the bed (k) and move the

upper shaft motor unit (c) to the left to adjust

the tension of the belt (h) to within the range

given below.

• When using a new belt: 130 - 140 N

• When reusing an old belt: 90 - 100 N

* Be sure to use a belt tension gauge to measure

the belt tension, and measure at the position

shown in the illustration.

* The belt tension gauge should be set to

measure a unit weight of 0.04 kg/m, a belt width

of 15 mm and a span length of 92 mm.

9) Tighten the two socket bolts with washer (g).

10) Tilt back the machine head and fully tighten the

socket bolt with washer (f) at the front.

11) Check that the D cut section (D) of the encoder

is facing directly to the right ± 10° at this

time.

* If it is not in this position, repeat steps 3 to

10. (If it is not in the correct position, the

adjustment in “7-35. Adjusting the needle up

signal home position for the upper shaft and

upper shaft motor” will not be possible.)

NOTE:

If you do not have a belt tension gauge, adjust

so that the amount of deflection is

approximately 1 mm when a pressure of 5 N is

applied to the middle of the span (the

measurement position shown in the illustration).

0856B

Measurement position

6. ASSEMBLY

RH-9820

115

6-19. Covers

1064B

6. ASSEMBLY

RH-9820 116

1. Cam cover

2. Screws [3 pcs]

3. Needle guide cover

4. Screws [4 pcs]

5. Main plate

6. Screws [4 pcs]

7. Eye guard assembly

8. Plain washers [2 pcs]

9. Screws [2 pcs]

10. Zigzag window cover

11. Wave washer

12. Shoulder screw

13. Rear cover

14. Screws [5 pcs]

15. Belt cover

16. Screws with washers [4 pcs]

17. Top cover assembly

18. Screws [9 pcs]

19. Needle bar guard

20. Socket bolts [2 pcs]

21. Switch cover

22. Screws with washers [3 pcs]

6. ASSEMBLY

RH-9820

117

6-20. Work clamp plate mechanism

* Refer to the detailed descriptions on pages 119 and 120 for details on A to D in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

Refer to “7-26-4. Adjusting the position of the

sub clamp”.

1008B

B DC

6. ASSEMBLY

RH-9820 118

1. Opening slide block

2. Slide block support plate

3. Screws [2 pcs]

4. Needle plate L

5. Flat screws [2 pcs]

6. Clamp shaft holder

7. Screws [2 pcs]

8. Cloth guide L

9. Screw

10. Bending washer

11. Work clamp L

12. Clamp support pin

13. Work clamp plate L

<-01 specifications only>

14. Nut

15. Clamp arm L

16. Socket bolt (Temporarily tighten)

17. Clamp lever L

18. Clamp fulcrum shaft

19. Retaining rings C [2 pcs]

20. Set screws [2 pcs]

21. Plate spring

22. Screw

23. Thread trimmer B

24. Thread trimmer A

25. Screw

26. Opening slide block

27. Slide block support plate

28. Screws [2 pcs]

29. Needle plate R

30. Flat screws [2 pcs]

31. Clamp shaft holder

32. Screws [2 pcs]

33. Cloth guide R

34. Screw

35. Bending washer

36. Cloth work clamp R

37. Clamp support pin

38. Work clamp plate R

<-01 specifications only>

39. Nut

40. Clamp arm R

41. Socket bolt (Temporarily tighten)

42. Clamp lever R

43. Clamp fulcrum shaft

44. Retaining rings C [2 pcs]

45. Set screws [2 pcs]

46. Cloth work clamp A

47. Sub auxiliary clamp wrist

48. Socket bolt (Temporarily tighten)

49. Auxiliary clamp arm

50. Retaining rings C

51. Spring

<-00 specifications only>

<-02 specifications only>

6. ASSEMBLY

RH-9820

119

A Cloth work clamp L sideways position adjustment

1) Set so that the clearance between the clamp shaft holder (6) and clamp lever L (17) is at the distance

shown in the illustration.

2) After adjusting, tighten the two set screws (20).

B Cloth work clamp L forward/back adjustment

1) Loosen the socket bolt (16) and then adjust the forward/back position of clamp arm L (15).

2) Next, adjust cloth work clamp L (11) so that its side is flush with the side of needle plate L (4).

3) Once adjustment is complete, tighten the socket bolt (16).

(Viewed from directly to the left)

1009B

1010B

6. ASSEMBLY

RH-9820 120

C Cloth work clamp R sideways adjustment

1) Set so that the clearance between the clamp shaft holder (31) and clamp lever R (42) is at the distance

shown in the illustration.

2) After adjusting, tighten the two set screws (45).

D Cloth work clamp R forward/back adjustment

1) Loosen the socket bolt (41) and then adjust the forward/back position of clamp arm R (40).

2) Next, adjust the cloth work clamp R (36) so that its side is flush with the side of needle plate R (29).

3) Once adjustment is complete, tighten the socket bolt (41).

(Viewed from directly to the right)

1012B

1011B

6. ASSEMBLY

RH-9820

121

6-21. Lower thread trimming mechanism

<-01 specifications>

* Refer to the detailed descriptions on pages 123 and 124 for details on A to E in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

1013B

Refer to “7-25. Replacing and

adjusting the movable knife and fixed

knife (for the lower thread and gimp)

<-01 specifications>”.

Refer to “7-25.

Replacing and

adjusting the

movable knife and

fixed knife (for the

lower thread and

gimp) <-01

specifications>”.

6. ASSEMBLY

RH-9820 122

1. Bush thread trimmer arm

2. Screws [2 pcs]

3. Nut

4. Spring hook

5. Screws [2 pcs]

6. Roller

7. Retaining ring

8. Thread trimmer link lever

assembly

9. Shoulder screw

10. Nut

11. Fixed knife bracket

12. Flat screws [2 pcs]

13. Thread trimmer arm

14. Pin

15. Spring hook

16. Screw

17. Thread cutter lever arm

18. Socket bolt

(Temporarily tighten)

19. Spring

20. Pin

21. Thread handler

22. Flat screw

(Temporarily tighten)

23. Screw

(Temporarily tighten)

24. Movable knife

25. Flat screws [3 pcs]

26. Movable knife collar

27. Thread nipper opener

28. Shoulder screw

29. Opener spring

30. Screws [2 pcs]

31. Fixed knife

32. Fixed knife plate spring

33. Fixed knife plate spring U

34. Thread guide plate

35. Socket bolts [2 pcs]

36. Fixed knife setting bracket

37. Screws [2 pcs]

(Temporarily tighten)

38. Opener pin

39. Thread nipper D

40. Thread nipper U

41. Screws [2 pcs]

42. Nuts [2 pcs]

43. Thread nipper M

44. Screws [2 pcs]

(Temporarily tighten)

45. Work clamp plate U

46. Screws [2 pcs]

6. ASSEMBLY

RH-9820

123

A Spring hook installation

1) Provisionally tighten the nut (3) about halfway

onto the spring hook (4).

2) Install the spring hook (4) to the cloth work

clamp plate (a), and then tighten the nut (3)

until the end of the spring hook (4) is flush with

the top surface of the cloth work clamp plate

(a).

* Install the spring hook (4) so that the hole

(b) is facing in the direction shown in the

illustration.

B Install the pin (14) so that it projects by the

distance shown in the illustration.

C Install the spring hook (15) so that it faces in

the direction shown in the illustration.

1014B

1015B 1016B

(Top)

(Bottom)

Should be flush

6. ASSEMBLY

RH-9820 124

D Insert the end of the opener spring (29) into

the notch (c) of the thread nipper opener (27).

E Install all parts so that the edges are aligned as

shown in the illustration.

1017B 1018B

lign the edges.

6. ASSEMBLY

RH-9820

125

<-02 specifications>

* Refer to the detailed descriptions on the next page for details on F and G in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

1019B

Refer to “7-26.

Replacing and

adjusting the

movable knife

and fixed knife

(for the lower

thread and gimp)

<-02

specifications>”.

Refer to “7-26. Replacing

and adjusting the movable

knife and fixed knife (for the

lower thread and gimp) <-02

specifications>”.

6. ASSEMBLY

RH-9820 126

1. Knife support washer

2. Flat screws [2 pcs]

3. Bush thread trimmer arm

4. Screws [2 pcs]

5. Nut

6. Spring hook

7. Screws [2 pcs]

8. Thread trimmer link A

assembly

9. Thread trimmer link B

assembly

10. Wave washer

11. Movable knife R

12. Thread handler

13. Screws [2 pcs]

14. Movable knife L

15. Shoulder screw

(Temporarily tighten)

16. Nut (Temporarily tighten)

17. Movable knife driving plate

18. Roller

19. Retaining ring

20. Thread trimmer link lever J

assembly

21. Shoulder screw

22. Nut

23. Pin

24. Spring hook

25. Screw

26. Thread cutter lever arm

27. Socket bolt

(Temporarily tighten)

28. Spring

29. Work clamp plate JU

30. Screws [2 pcs]

F Spring hook installation

1) Provisionally tighten the nut (5) about halfway

onto the spring hook (6).

2) Install the spring hook (6) to the cloth work

clamp plate (a), and then tighten the nut (5) to

the position shown in the illustration.

* Check that the end of the spring hook (6) is

not protruding from the surface of the cloth

work clamp plate (a).

* Install the spring hook (6) so that the hole

(b) faces in the direction shown in the

illustration.

Install the pin (23) so that it projects by the

distance shown in the illustration.

1020B

1021B

(Top)

(Bottom)

6. ASSEMBLY

RH-9820

127

6-22. Upper cover mechanism (upper thread tension release and upper

thread take-up mechanisms and upper thread path)

* Refer to the detailed descriptions on the next page for details on A to C in the illustration.

* Apply the grease specified by Brother (MOLYKOTE LONGTERM W2 manufactured by Dow Corning

Corporation) in the places indicated by .

Refer to “7-31.

djusting the

upper thread

loosening

amount”.

fter installing the

Socket bolt (16),

tighten the two screws

(4) so that the cylinder

moves smoothly.

0857B

6. ASSEMBLY

RH-9820 128

1. Cylinder assembly

2. Cylinder joint A

3. Cylinder setting plate A

4. Screws [2 pcs]

(Temporarily tighten)

5. Thread take-up lever

driving plate

6. Thread take-up lever plate

7. Collar A

8. Washer

9. Socket bolt

10. Nut

11. Screw

12. Thread take-up lever base

13. Screws [2 pcs]

14. Collar B

15. Washer

16. Socket bolt

17. Plain washer

18. Compression spring

19. Impact support shaft

20. Retaining ring C

21. Button clamp A

22. Impact support plate

23. Screws [2 pcs]

24. Tension discs [2 pcs]

25. Tension disc presser

26. Tension disc presser

27. Tension spring

28. Washer

29. Tension nut

30. Tension stud U

31. Set screw

32. Tension release pin

33. Solenoid cushion

34. Washer

35. Nut

36. Bolt

37. Upper thread tension release

solenoid

38. Plain washers [2 pcs]

39. Spring washers [2 pcs]

40. Bolts [2 pcs]

41. Solenoid setting plate

42. Screws [2 pcs]

43. Upper thread guide A

44. Screw

45. Thread guide discs [2 pcs]

46. Pre-tension spring B

47. Tension nut

48. Tension stud

49. Thread guide rod A

50. Sewing thread retainer guide

51. Screws [2 pcs]

52. Sewing thread retainer guide

53. Screws [2 pcs]

54. Thread spool pin

55. Nut

56. Rubber cap

A Assemble as shown in the illustration.

B Assemble as shown in the illustration.

C Install the thread spool pin (54) so

that the holes face in the direction

shown in the illustration.

0858B

0860B

0859B

Holes

(When cylinder is at

maximum retraction)

(When cylinder is at maximum retraction)

6. ASSEMBLY

RH-9820

129

6-23. Routing the harnesses

Route the harnesses from the various parts in the order shown in the table below.

<1> Cord holder

<2> Cord bush

<3> Cord holder

<4> Cord holder

<5> Cord holder

<6> Fastening band

<7> Cord holder

<8> Cord holder

<9> Cord holder

<10> Cord holder

<11> Cord holder

<12> Cord holder

<13> Cord holder

<14> Cord holder

[A]-[G]：Indicates holes

[H]：Indicates a gap

Routing order

Part name 1 2 3 4 5 6 7 8 9

Stop switch <1> <2> <3> <4> <5> [A] <8>

Cutter sensor <6> <7> [A] <8>

Upper tension release solenoid [A] <8>

Main valve harness <8> <9> [B] [E] <12> [F] <13> <14> [G]

Relay harness <9> [B] [E] <12> [F] <13> <14> [G]

Upper thread solenoid harness <9> [B] [E] <12> [F] <13> <14> [G]

1106B

Stop switch Upper tension release

solenoid

Cutter sensor

Main valve harness

Relay harness

Upper thread

solenoid harness

6. ASSEMBLY

RH-9820 130

Routing order

Part name 1 2 3 4 5 6 7 8 9

Gimp thread solenoid [C] [E] <12> [F] <13> <14> [G]

Y sensor <10> [D] <11> <13> <14> [G]

Lower tension release solenoid [E] <12> [F] <13> <14> [G]

Safety switch <11> <13> <14> [G]

X motor <13> <14> [G]

Y motor [G]

θmotor [G]

Upper shaft motor [H]

Fan [G]

1107B

Y sensor

Gimp thread solenoid

Safety switch

Lower tension release

solenoid

X motor θ motor

Fan

Y motor

Upper shaft motor

6. ASSEMBLY

RH-9820

131

6-24. Routing the air tubes

Cutter cylinder

Insert the air tubes (No. 5 and No. 6) of the cutter cylinder (a) into the elbows (b) in the bed base.

* Insert the air tubes into the elbows (b) with the same numbers.

Upper thread cutter cylinder

1) Pass the air tubes (No. 13 and No. 14) of the upper thread cutter cylinder (c) through the hole in the bed

and out through the bottom.

2) Secure the air tubes with the cord holder (d).

3) Pass the air tubes (No. 13 and No. 14) through the hole in the bed as shown in the illustration below.

4) Pass the air tubes (No. 13 and No. 14) out through the bottom of the bed into the side of the arm, and

then pass them out through the side of the arm.

1066B

1067B

1068B

1065B

(Left side of arm)

6. ASSEMBLY

RH-9820 132

Valve unit

1) Pass the air tube (No. 1) of the valve unit (e) from the side marked with “1” into the hole in the side of the

arm and out into the bottom of the bed.

2) Pass the air tube (No. 1) through the hole in the bed and out from the rear of the bed.

Cutting scraps

1) Secure the air tube (f) for cutting scraps with the cord holder (g).

2) Pass the air tube (f) for cutting scraps through the hole and out from the rear of the bed.

3) Secure the air tube (No. 1) for the valve unit (e) and the air tube (f) for cutting scraps with the tube

presser (h).

1069B

1070B

1071B

1072B

6. ASSEMBLY

RH-9820

133

Upper tension release cylinder

Pass the air tube (i) for the upper tension release cylinder through the hole in the arm and out from the side

of the rear cover.

Connecting the air tubes

Insert the air tubes onto the nipples of the solenoid valve

assembly (j).

* There are numbers marked on each air tube. Insert the air

tubes onto nipples with corresponding numbers.

《Solenoid valve tubes and functions》

Label

No. Solenoid valve type

1 For upper thread take-up

2 For upper thread trimming

3 For cloth spreading (+ for

auxiliary clamp arm *1)

4 For cloth work clamp

5 For lower thread trimming *2

*1: Auxiliary clamp arm is for -02 specifications

only.

*2: The solenoid valve for label No. 5 is not

present in specifications without a lower

thread trimmer.

1073B

(Left side of arm)

1074B

Insert the plug (4).

6. ASSEMBLY

RH-9820 134

Securing the air tubes

Secure the air tubes and the harnesses with the cord holders (k) (2 places).

Tubes and harnesses from the feed base

1075B

6. ASSEMBLY

RH-9820

135

6-25. Lubrication and greasing and routing the oil tubes

* <1> to <8> should be done before carrying out the assembly procedure in “6-1. Cutter mechanism”.

* Refer to the detailed descriptions on pages 136 to 140 for details on A to J in the illustration.

1029B

E C

6. ASSEMBLY

RH-9820 136

<1> Oil tube

<2> Felt assembly

(Attach with glue)

<3> Tube guide

<4> Socket bolt

<5> Wick

<6> Oil tube

<7> Cord holder #5

<8> Screw

1. Wick

2. Oil tube

3. Oil joint S

4. Collar

5. Oil joint S

6. Collar

7. Oil tube

8. Cord holder (NK-3N)

9. Screw

10. Wick

11. Oil joint S

12. Collar

13. Oil tube

14. Cord holder (NK-3N)

15. Screw

16. Tube support

17. Socket bolts [2 pcs]

18. Cord holder (NK-3N)

19. Screw

20. Cord holder

21. Screws [2 pcs]

22. Cord holder

23. Screw

24. Cord holder (NK-3N)

25. Screw

26. Oil plate assembly

27. Screws [4 pcs]

28. Cord holder #5

29. Screw

30. Oil gauge window

31. Felt

32. Lower shaft cover assembly

33. Screws [2 pcs]

34. Cord holders #5

35. Screw

36. Cord holders #10 [2 pcs]

37. Screws [2 pcs]

38. Cord holder (NK-3N)

39. Screw

40. Sub-tank assembly

41. Socket bolts [2 pcs]

42. Tube clip spring

43. Oil tube (<6>)

(Push into sub-tank)

44. Cord holders (7N) [4 pcs]

45. Screws [4 pcs]

46. Wick

47. Wick

48. Felts [2 pcs]

49. Felt

50. Tube support B

51. Screw

52. Felt

53. Cord holder #5

54. Screw

A Install the oil tube (7) and the oil tube (13) to the tube support (16) as shown in the illustration.

B Secure the oil tube (13) with the cord holder (NK-3N) (18) as shown in the illustration.

1030B

1031B

lign the

edges

6. ASSEMBLY

RH-9820

137

C Cord holder (20) installation

1) Install the cord holder (20) so that the side with

the wider hook is on the right as shown in the

illustration, and then while gently pushing it in

the direction of the arrow, tighten the two

screws (21) to secure it in place.

2) Secure the oil tube (7) behind the cord presser

(20) and the stop switch cord (a) with the cord

presser (22).

D Tapping in the oil pot window

1) Insert the oil tube (6) and the oil tube (b)

coming from the oil plate assembly (26) into the

oil tank.

2) Check that the wick (c) is attached to the base

of the oil tank, and then tap in the oil gauge

window (30).

E Inserting the wicks

1) Insert the four wicks (d) into the arm relay hole

(e).

* Insert the four wicks (d) securely into the

holes as far as they will go.

* A list of the four wicks (d) is as follows.

・Wick (1)

・Wick (10)

・Felt presser assembly (7) in “6-6. Needle

bar mechanism (2)”

・Wick (11) in “6-3. Zigzag mechanism”

2) Push in the felt (31).

1032B

1033B

1034B

Narrow

side

Wide

side

6. ASSEMBLY

RH-9820 138

F Installing the lower shaft cover assembly

1) Pass the oil tube (43) through the hole (f) in the

lower shaft cover assembly (32).

2) Pass the oil tube <1> from the arm through the

felts.

1) Secure the oil tube (43) with the cord holder #5

(34).

2) Install the two cord holders #10 (36) as guides

for routing the oil tube (43).

3) Connect the oil tube (43) to the sub-tank

assembly (40).

* Make sure that the wick <5> does not cover

the hole.

H Secure the oil tube (g) coming from the sub tank assembly (40) with the four cord holders (44).

1035B

1036B

1037B

Maintain a

clearance

6. ASSEMBLY

RH-9820

139

1) Insert the wicks (46) and (47) into the hole in

the bed as far as they will go.

2) Push the two felts (48) into the positions shown

in the illustration.

3) Insert the four wicks mentioned below into the

bed hole (h).

・ Thin wick (i) coming from sub tank assembly

(40)

・ Wick (6) and wick (8) (j) of “6-11. Looper

mechanism”

・ Wick (4) (k) of “6-12. Spreader mechanism”

4) Push the felt (49) into the bed hole (h).

5) Secure the oil tubes with the tube support B

(50).

1038B

1039B

1040B

6. ASSEMBLY

RH-9820 140

1) Pass the thicker oil tube (l) through the

underside of the bed.

2) Pass the oil tube (l) through the hole (m), (n) in

the bed and out from the looper base side.

3) Push the felt (52) in through the hole (o) in the

bed so that it is touching the wick.

4) Secure the oil tube (l) with cord holder #5 (53).

1041B

1042B

7. ADJUSTMENTS

RH-9820

141

7. ADJUSTMENTS

CAUTION

Maintenance and inspection of the sewing machine

should only be carried out by a qualified technician.

Ask your Brother dealer or a qualified electrician to

carry out any maintenance and inspection of the

electrical system.

Turn off the power switch and disconnect the power

cord at the following times.

If this is not done, the sewing machine may operate if

the start switch is pressed by mistake, which could

result in serious injury.

• When carrying out inspection, adjustment and

maintenance

• When replacing consumable parts such as the

loopers and knife

Disconnect the air hoses from the air supply and wait

for the needle on the pressure gauge to drop to “0”

before carrying out inspection, adjustment and repair

of any parts which use the pneumatic equipment.

If the power switch and air need to be left on when

carrying out some adjustment, be extremely careful to

observe all safety precautions.

If any safety devices have been removed, be

absolutely sure to re-install them to their original

positions and check that they operate correctly before

using the machine.

7-1. Adjusting the heights of the spreaders and loopers

Spreader height

(When viewed from directly above) (When viewed from the front)

1. Remove the work clamp plates. (Refer to “3-19. Installing and removing the work clamp plates” in the instruction manual.)

2. Check the following.

• Check that the spring (3) causes the spreader L (1) to move smoothly without any play between the spreader stopper L

(4) and the LS holder base (5).

• Check that the spring (3) causes the spreader R (2) to move smoothly without any play between the spreader stopper R

(6) and the LS holder base (5).

3. If the spreaders do not move smoothly or if there is play in their movement, loosen the set screws (7) and move the spreader

stopper L (4) or spreader stopper R (6) up or down to adjust.

4. Once adjustment is complete, securely tighten the set screws (7).

0481B

7. ADJUSTMENTS

RH-9820 142

Looper height

Adjust so that the positions of the eye looper (8) and the looper R (9) are as follows.

• The clearance <a> between the eye looper (8) and the spreader L (1) should be equal to the thickness of the lower thread

(looper thread).

• The clearance between the looper R (9) and the spreader R (2) should be as small as possible (so that the two parts do not

touch).

1. Loosen the set screws (10), and then move the eye looper (8) or the looper R (9) up or down to adjust.

2. Check that the spreader L (1) and the spreader R (2) move smoothly by the force of the springs (3).

3. Once adjustment is complete, securely tighten the set screws (10).

7-2. Adjusting the zigzag width (stitch width)

The zigzag width can be adjusted to between 1.5 - 4 mm. It is set to 3 mm at the time of shipment from the factory.

* If the zigzag width is set to 3.2 mm or more, replace the throat plate (optional part).

1. Turn the cover (1) to open it.

2. Use the accessory socket wrench to loosen the zigzag width adjustment nut (2).

3. Move the adjustment screw (3) up or down along the slot to adjust.

* The zigzag width becomes smaller as the adjustment screw (3) is moved upward.

* The zigzag width becomes larger as the adjustment screw (3) is moved downward.

* There are index marks at the 2 mm and 3 mm zigzag width positions. Align the middle of the adjustment screw (3) with the

index marks.

4. Once adjustment is complete, securely tighten the adjustment nut (2), and then close the cover (1).

NOTE:

• If the zigzag width has been increased, carry out the following readjustments.

“7-4. Adjusting the needle and looper timing”, “7-5. Adjusting the looper stroke”, “7-6. Adjusting the height of the needle bar”,

“7-7. Adjusting the clearance between the loopers and needle”, “7-8. Adjusting the needle guard”, “7-9. Adjusting the

spreader installation positions”, “7-10. Adjusting the spreader timing”.

• The index marks are a guide to the zigzag width. Lower the needle onto a piece of paper or similar to accurately measure

the zigzag width.

0483B

1.5mm - 4mm

0967Q 0474B

7. ADJUSTMENTS

RH-9820

143

7-3. Adjusting the zigzag base line position

Preparing a short customized needle

Prepare a short needle as described below in order to make very small holes in a piece of paper while checking the needle drop

position.

1. Use a grinder or similar to grind the tip of the

currently-used needle until the length of the needle is 15

mm.

2. Sharpen the tip of the needle.

NOTE:

Sharpen the needle so that the tip of the needle is in the

middle.

3. Place a piece of paper (1) underneath the work clamps.

4. Turn the upper shaft pulley (2) to set the needle to its

lowest position.

5. Move the needle up or down to adjust the installation

position of the needle so that the tip of the needle makes a

hole with a width of about 0.5 mm in the paper (1) when

the needle comes to the needle down position.

Hole width approx. 0.5 mm

0564B

Sharpen tip

0563B

middle middle

7. ADJUSTMENTS

RH-9820 144

Adjusting the zigzag base line position

The zigzag base line is on the inside of the zigzag.

If you change the zigzag width, only the outer needle drop position will change, and the zigzag base line (inner base line) will not

change.

1. Move the needle bar gear block (θ) to the home position.

* The home position for the needle bar gear block (θ) is

when the bed index mark (1) and the looper base index

mark (2) are aligned.

2. Install the short customized needle (3).

(Refer to “Preparing a short customized needle” on the

previous page.)

3. Move the feed base (4) forward (to near the sewing start

position) by hand.

4. Place a piece of paper (5) underneath the work clamps.

* Secure the piece of paper so that it will not move.

5. Turn the upper shaft pulley (6) to lower the needle so that it

makes a small hole in the paper (5).

6. Turn the upper shaft pulley (6) in reverse to return the

needle to its original position (needle up position).

7. Turn the needle bar gear block (needle bar) (7) by hand

180 degrees.

8. Turn the upper shaft pulley (6) to lower the needle so that it

makes a small hole in the paper (5).

* If the inner needle drop positions (A) are not aligned,

carry out the adjustments in steps 9 - 12 on the next

page.

(Continued on next page)

0475B

0431B

0329B

0562B

7. ADJUSTMENTS

RH-9820

145

9. Remove the face plate (8), and then loosen the socket bolt

(9).

10. Open the cover (10), and then remove the cap (11).

11. Insert a flat-tipped screwdriver into the hole and turn the

zigzag eccentric pin (12) to adjust the zigzag base line

position.

12. Tighten the socket bolt (9).

13. Repeat steps 4 - 12 until the inner zigzag base line is

aligned correctly.

14. Once adjustment is complete, return the cap (11), cover

(10) and face plate (8) to their original positions.

0476B

0434B

7. ADJUSTMENTS

RH-9820 146

7-4. Adjusting the needle and looper timing

NOTE:

The needle bar moves through two needle drop cycles for each single turn of the upper shaft pulley. The needle drop

movement toward the left side (knife cutting side) is called the “inside sewing position”, and the needle drop movement

toward the right is called the “outside sewing position”. In addition, the amount of movement involved when the needle bar

rises from its lowest position until the tip of the looper at either the left or right is aligned with the center of the needle is called

the “loop stroke”.

The left and right loop strokes must be the same as each other. This section describes the adjustments to be carried out so that

the left and right loop strokes are the same.

* Before carrying out these adjustments, set the zigzag width (stitch width). (Refer to “7-2. Adjusting the zigzag width (stitch

width)”.)

1. Remove the two socket bolts (1), an then remove the needle bar guard (2).

2. Turn the upper shaft pulley (3) to set the needle bar to its lowest position at the inside sewing position.

3. Use calipers to measure the length from the edge of the needle bar (4) to the top of the needle bar bush holder base (5).

4. Next, turn the upper shaft pulley (3) until the tip of the eye looper (6) is aligned with the needle center (7).

5. In the same was as in step 3, use calipers to measure the length from the edge of the needle bar (4) to the top of the needle

bar bush holder base (5).

6. Calculate the difference <a> between the value obtained in step 5 and the value obtained in step 3.

7. Repeat steps 2 - 6 and calculate the difference <a'> for the outside sewing position in the same way as for the inside sewing

position.

* For the inside sewing position, align the tip of the eye looper (6) with the needle center (7), and for the outside sewing

position, align the tip of looper R (8) with the needle center (7).

8. Loosen the screw (9).

9. Move the LS holder base (10) to the left or right to adjust

so that length <a> and length <a'> are the same.

10. Once adjustment is complete, securely tighten the screw

(9).

(Viewed from the front)

0484B

0487B 0488B

Lowest position

of needle ba

When center of needle is

aligned with tip of loope

(Inside sewing

position)

(Outside sewing

position)

7. ADJUSTMENTS

RH-9820

147

7-5. Adjusting the looper stroke

The standard looper stroke is 2.7 mm. (It may be preferable to change this depending on the material and thread.)

* Carry out the adjustment in “7-4. Adjusting the needle and looper timing” before making this adjustment.

1. Turn the upper shaft pulley (1) to set the needle bar to the needle drop position at the inside sewing position.

2. At this position, use calipers to measure the length from the edge of the needle bar (2) to the top of the needle bar bush

holder base (3).

3. Add 2.7 mm to the value obtained in step 2 above, and set the width of the calipers to the resulting value.

4. Turn the upper shaft pulley (1) until the edge of the needle bar (2) touches the edge of the calipers, and stop turning the

upper shaft pulley (1) at that point (A).

Push against Should be no gap

5. Tilt back the machine head.

6. Loosen the two set screws (5) of the lower shaft cam (4).

7. With the upper shaft pulley (1) stopped, turn the lower shaft cam (4) to adjust so that the tip of the eye looper (6) is aligned

with the needle center (7).

8. Once adjustment is complete, push the lower shaft cam (4) against the surface of the bearing collar (8), and then securely

tighten the two set screws (5).

0327B 0491B0490B

0489B

Moves to left

Moves to right

7. ADJUSTMENTS

RH-9820 148

7-6. Adjusting the height of the needle bar

The standard height for the needle bar is 2.5 mm. (It may be preferable to change this depending on the material and thread.)

1. Remove the face plate.

2. Turn the upper shaft pulley until the tip of the eye looper (1) is aligned with the top edge of the needle hole in the needle

center (2) when the needle is at the inside sewing position.

3. Loosen the two screws (4) of the top and bottom needle bar clamps (3).

4. Lower the needle bar (5) 2.5 mm from the position where the tip of the eye looper (1) is aligned with the top edge of the

needle hole.

5. In order to make the needle bar turn smoothly, adjust so that there is no play in the needle bar, but so that there is enough of

a gap between the needle bar clamps (3) and the needle bar feed rock link (6) for oil to get into.

6. Once adjustment is complete, securely tighten the two screws (4) and install the face plate.

0497B

0450B 0496B

0328B

7. ADJUSTMENTS

RH-9820

149

7-7. Adjusting the clearance between the loopers and needle

If the needle count has been changed, always be sure to check the clearance between the needle and the loopers, and adjust

the clearances if necessary. These adjustments should be made for both the inside sewing position and outside sewing

position.

(Inside sewing position) (Outside sewing position)

Turn the upper shaft pulley (1) so that the tips of both the left and right eye loopers (2) are aligned with the needle center, and

then loosen the set screws (3) and adjust the clearances between the needle and the tips of the eye loopers (2) to 0.01 - 0.08

mm.

* These clearances must be uniform while the looper base is rotating (through 360 degrees). If they are not uniform, adjust

the center of rotation of the needle bar. (The center of rotation is already adjusted at the time of shipment from the factory.)

* After making this adjustment, carry out the adjustment procedures given in “7-9. Adjusting the spreader installation

positions”.

7-8. Adjusting the needle guard

If the needle count has been changed, always be sure to check the position of the needle guard, and adjust the position if

necessary. This adjustment should be made for both the inside sewing position and outside sewing position.

(Inside sewing position) (Outside sewing position)

Turn the upper shaft pulley (1) so that the tips of both the left and right loopers (2) are aligned with the needle center, and then

loosen the screw (5) and adjust the needle guard (3) so that it touches the needle (4).

NOTE:

If it crosses the needle more than necessary, it will place a load on the needle and this may cause the needle to break.

Alternatively, if it does not cross the needle at all, the tips of the loopers will interfere with the needle and skipped stitches

may occur.

0499B0498B

0493B

0492B

0.01 - 0.08mm

7. ADJUSTMENTS

RH-9820 150

7-9. Adjusting the spreader installation positions

1. Loosen the set screw (4) and adjust spreader stopper L (5) so that the relative positions of the U-shaped part at the tip of

spreader L (1) and the lower thread guide hole (3) in the eye looper (2) are as shown in the illustration below.

2. Once adjustment is complete, tighten the set screw (4).

3. Loosen the set screw (8) and adjust the spreader stopper R (9) so that the top edge of the tip of spreader R (6) is aligned

with the top edge of the tip of looper R (7).

4. Once adjustment is complete, tighten the set screw (8).

NOTE:

Spreader L (1) and spreader R (6) should not protrude above the eye looper (2) or looper R (7) respectively. If they do,

skipped stitches or needle breakages may occur.

0494B

7. ADJUSTMENTS

RH-9820

151

7-10. Adjusting the spreader timing

Spreader R (1) (at inside sewing position) and spreader L (2) (at outside sewing position) must touch the spreader stoppers (3)

and (4) respectively and stop moving immediately before the needle bar reaches its lowest position.

* Adjustment can be carried out more easily if it is done in manual mode.

1. Tilt back the machine head.

2. Loosen the two screws (5), and then loose the set screw (6).

3. Turn the eccentric pin (7) to adjust.

4. After adjusting, tighten the set screw (6) and the two screws (5) in that order.

NOTE:

Make sure that spreader R (1) and spreader L (2) do not obstruct the needle after adjustment.

0501B0500B

7. ADJUSTMENTS

RH-9820 152

7-11. Adjusting the height of the throat plate

<-00 and -01 specifications>

<-02 specifications>

(Viewed from the front)

(Viewed at an angle from above-right)

1. Remove the right-side work clamp plate (1).

2. Turn the looper base (2) so that it faces as shown in the illustration.

3. Loosen the screw (3), and then move gimp thread guide C (5) to a position where it will not obstruct turning of the screw (4).

4. Loosen the screw (4) by about 10 turns.

5. Loosen the set screw (6).

6. Move the vertical pin (7) to adjust the height of the throat plate (8) as follows.

Adjust so that the top of the throat plate (8) and the top of the needle plate (9) are at the same height.

Adjust so that the top of the throat plate (8) is 0.4 - 0.6 mm lower than the top of the needle plate (9).

NOTE:

• If the position of the throat plate (8) is too high, it may obstruct the movable knife and damage it.

• Press down gently on the throat plate (8) from above while adjusting it. If the adjustment is carried out while the throat

plate (8) is lifted up, the correct adjustment result will not be obtained.

7. Once adjustment is complete, tighten the screws that were loosened and return all other parts to their original positions.

0561B0560B

7. ADJUSTMENTS

RH-9820

153

7-12. Changing the cutting length (Replacing the hammer)

The cutting length is determined by the length of the hammer. File or replace the hammer in order to change the cutting length.

1. Loosen the knob screw (1), and then remove the hammer (2).

2. [If grinding the hammer (Refer to Figure A)]

Use a grinder to grind section of the hammer so that cutting length + 1.5 mm = <a>.

3. [If installing a new hammer]

Push the hammer against the positioning pin (3) (or the hammer spacer (4)), and then tighten the knob screw (1).

NOTE:

If the knife that was being used previously is replaced by a knife with a different number, replace the hammer also. If the

same hammer is used for two or more different types of knife, different knife incisions will be formed on the hammer, and this

may cause problems with the accurate cutting of the material or may damage the knife.

0463B

7. ADJUSTMENTS

RH-9820 154

7-13. Adjusting the cutting surface of the hammer

1. Remove the hammer. (Refer to the previous page for

instructions on removing the hammer.)

2. Check the cutting surface of the hammer. Refer to the

illustration at left, and if the cutting surface looks like (b) -

(d), file the cutting surface so that the knife incision is

made evenly on the cutting surface.

(a) Knife incision is correct

(b) Knife incision is too deep

overlapping knife incision

(d) Partial knife incision which is not being made

completely

3. If the material cannot be cut cleanly even though the

hammer has been ground correctly, also check whether

the tip of the knife is worn.

* If the tip is worn, replace the knife.

* Do not use the old hammer after the knife has been

replaced. If the same hammer is used, it may damage

the tip of the knife.

7-13-1. Filing the cutting surface of the hammer

The cutting pressure over the whole of the hammer should be

uniform so that the material will be cut cleanly. File the cutting

surface of the hammer so that the knife incision will be uniform

over the whole of the hammer.

* The hammer can be filed until a height of 20 mm remains.

* Use a flat file for filing the hammer.

Filing the cutting surface of the hammer on which the

knife incision is overlapping or has shifted

1. Grip the hammer in a vise.

2. Use the flat file to file the cutting surface of the hammer

until the knife incision disappears.

Filing the cutting surface of the hammer in which knife

incision is deep

1. Grip the hammer in a vise.

2. Use the flat file to file the cutting surface of the hammer

smoothly until a single knife incision can still be seen

faintly.

* Once filing is complete, install the hammer.

0504B

0505B

7. ADJUSTMENTS

RH-9820

155

7-13-2. Adjusting the contact between the knife and the hammer

The knife incision can be seen more clearly if the cutting surface of the hammer is filled over with a marker pen or similar.

1. Operate the hammer three times with the knife making a mark on it each time.

2. If the knife incision is not uniform, file the hammer. (Refer to the previous page for details on filing the hammer.)

3. Repeat steps 1 and 2 until the knife incisions are uniform.

The following method can also be used to adjust the contact.

1. Loosen the four screws (1).

2. Insert some thin paper into either of the gaps A or B

between the hammer bracket (2) and the cutter driving

shaft (3).

3. Tighten the four screws (1).

* Push the hammer bracket (2) in the direction of arrow

C and firmly upward in the direction of D shown in the

illustration so that there is no gap between the hammer

bracket (2) and the cutter driving shaft (3), and then

tighten the screws.

(This operation will position the hammer bracket (2))

accurately by pushing the pin (4) of the hammer

bracket (2) against the hole side of the cutter driving

shaft (3).)

7-14. Adjusting the axial play of the hammer

If there is too much axial play in the hammer, carry out the

following adjustment.

1. Loosen the two nuts (1).

2. Tighten the two screws (2) slightly to adjust while checking

the amount of play.

3. When the hammer bracket (3) is pushed downward by

hand, check that the built-in extension spring (4) causes it

to return correctly.

* If the hammer bracket (3) does not return correctly, it

may obstruct the work clamps and damage may result.

4. Once adjustment is complete, tighten the two nuts (1).

0464B

0470B

7. ADJUSTMENTS

RH-9820 156

7-15. Making the cutter driving shaft and driving shaft presser move together

The cutter driving shaft (2) and driving shaft presser (3) are linked by an extension spring (4) so that the hammer bracket (1) can

be positioned by being pushed down by hand when aligning the needle with an eyelet buttonhole that has already been made

in the material in order to resume sewing. If this extension spring (4) has been damaged, or if the return speed of the cutter is

too slow, the cutter driving shaft (2) and the driving shaft presser (3) can be made to move together as a single unit.

1. Turn the cock (5) in the direction of the arrow to close it and stop the supply of air.

2. Press the button (6) to release the air.

NOTE:

When the air is released, the hammer may lower by its own weight.

3. Remove the upper cover (7) and the face plate (8).

4. Lower the cylinder rod (9) to align the screw (A) of the cutter driving shaft (2) with (B) inside the face plate.

5. Use a commercially-available set screw (6) (M6 with a length of 6mm or less) to secure (A) and (B) together.

* Tighten the set screw (10) securely. If the set screw (10) is loose and protrudes from the surface of the cutter driving shaft

(2), damage may result.

6. Install the face plate (8) and the upper cover (7), and then open the cock (5) to resume the supply of air.

0502B 0503B

0472B0473B

7. ADJUSTMENTS

RH-9820

157

7-16. Replacing the knife and adjusting its position

7-16-1. Replacing the knife

CAUTION

Do not operate the sewing machine while a knife and hammer with numbers that are different from those which have

been set in programs.

If this is not observed, damage to sewing machine parts or the needle or serious injury may occur.

1. Check that there is no gap between the block stopper plate (1) and the knife (2), and then loosen the socket bolt (3) and

remove the knife (2).

2. Place the new knife to be installed against the block stopper plate (1), and then tighten the socket bolt (3).

NOTE:

• When replacing the knife, use the parameter settings to change the eyelet pattern to the pattern that corresponds to the

knife number (4) that is given on one side of the knife. (Refer to “5-3-1. Parameter list” in the instruction manual.)

• Replace the knife and hammer as a set. If the same hammer is used for two or more different types of knife, different knife

incisions will be formed on the hammer, and this may cause problems with the accurate cutting of the material or may

damage the knife.

0466B 0468B

0467B

7. ADJUSTMENTS

RH-9820 158

7-16-2. Making fine adjustments to the knife position

Adjust the knife position so that it cuts the material cleanly at the inside sewing position and around the eyelet.

* Before carrying out this adjustment, check that the procedure in “7-3. Adjusting the zigzag base line position” has been

completed correctly.

* The knife position can be adjusted independently in the forward/back direction and tilt direction.

1. Install the short customized needle (1).

(Refer to “7-3. Resetting the data (initialization)” in the

instruction manual for details on the short customized

needle (1).)

2. Set the air pressure at the hammer pressure adjustment

regulator on the underside of the table to about 0.2 MPa.

(Refer to “7-17. Adjusting the cutting pressure”.)

* This is so that the knife will not make several

overlapping incisions in the hammer and so that the

paper for checking the needle drop does not become

pierced while adjusting the knife position.

3. Press the AFTER key (2) on the operation panel to set the

cutting method to “cutting after sewing”.

4. Place a piece of paper (3) underneath the work clamps.

5. Start the sewing machine and trace the needle drop

position around the eyelet hole.

6. Check that the needle drop positions around the eyelet

hole and the knife cutting position overlap uniformly.

* Checking will be easier if the cutting position value (A)

in the parameter settings is set to “0”. (Refer to “5-3-1.

Parameter list” in the instruction manual.)

7. If they do not overlap uniformly, turn off the power and

carry out the adjustment in steps 8 - 13.

* Once adjustment is complete, repeat steps 4 - 6 to

check, and if further adjustment is needed, repeat step

(Continued on next page)

0417B

0397B

0431B

0555B

15mm

7. ADJUSTMENTS

RH-9820

159

8. Loosen the socket bolt (4), and move the knife position forward or back to adjust.

9. Once the knife position has been determined, securely tighten the socket bolt (4).

10. Loosen the screw (5), push the block stopper plate (6) against the knife, and then tighten the screw (5).

* The block stopper plate (6) is a guide for showing the current position of the knife, so be sure to move the block stopper

plate (6) so that it is touching against the knife.

11. Loosen the socket bolts (7), (8) and (9).

12. Turn the eccentric pin (10) to adjust.

* Fine adjustments can also be made by turning

centering on the pivot (11).

13. Once adjustment is complete, tighten the socket bolts (9),

(8) and (7) in that order.

(Viewed from directly above the knife base)

0557B

0556B

0558B

7. ADJUSTMENTS

RH-9820 160

NOTE: Relationship between needle drop position and eyelet pattern at the eyelet

When switching between cutting before sewing or no cutting

and cutting after sewing, the needle drop position at the inside

sewing position will change automatically in accordance with

the eyelet pattern as shown in the illustration.

Needle drop c x d

Knife

No.

Eyelet pattern

a x b Cutting before

sewing or no cutting

Cutting after

sewing

1 2.1 x 3.2 1.7 x 2.7 2.5 x 3.8

2 2.8 x 4.3 2.4 x 3.9 3.2 x 4.9

3 3.0 x 4.6 2.6 x 4.1 3.4 x 5.2

4 3.2 x 5.4 2.8 x 4.9 3.6 x 6.0

5 Straight Straight Straight

6 3.8 x 4.3 3.4 x 3.8 4.2 x 4.9

Cutting before sewing Cutting after sewing

7-17. Adjusting the cutting pressure

Set the cutting pressure to the minimum pressure that still

allows the material to be cut.

* Set to between 0.1 - 0.6 MPa. (It is set to 0.4 MPa at the

time of shipment from the factory.)

Turn the knob (1) of the hammer pressure adjustment

regulator on the underside of the table to adjust the air

pressure.

NOTE:

• Do not increase the cutting pressure more than necessary.

If the pressure is too high, it will wear out the hammer and

damage the knife.

• If the material cannot be cut cleanly, do not increase the

cutting pressure to too high a pressure.

Check the timing between the knife and the hammer.

(Refer to “7-13-2. Adjusting the contact between the knife

and the hammer”.)

0559B

Eyelet pattern a x b

Needle drop c x d

0469B

7. ADJUSTMENTS

RH-9820

161

7-18. Adjusting the work clamp lift amounts

Adjust the work clamp lift amount <a> to one of the values given below.

<For -00, -01 specifications>: 12 mm

<For -02 specifications>: 16 mm

* The work clamp lift amount <a> is the value which includes the play in crank lever B (1) and the clamp lever (2).

* Carry out adjustment for both the left and right work clamps. (The following describes how to adjust the lift amount for the

right-side work clamp.)

1. Remove the two screws (3), and then remove feed base

cover U (4).

2. Remove the six screws (5) and the shoulder screw (6),

and then remove feed base cover R (7) at the right side.

(Viewed from directly to the right)

3. Insert a block with a thickness of 12 mm or 16 mm or a gauge (10) in between the support point of work clamp R (8) and the

needle plate (9).

4. Loosen the screw (12) of the clamp driving lever (11).

5. Push section (B) of crank lever B (1) upward so that the tip (13) is pressed against the end of clamp lever R (2) as shown in

the illustration.

6. While holding the parts in the position in step 5, tighten the screw (12).

NOTE:

Check that work clamp R (8) is pressed securely against the block or the gauge (10).

7. Install feed base cover R (7) and feed base cover U (4).

* Adjust the lift amount for the left-side work clamp in the same way.

0508B

0509B

7. ADJUSTMENTS

RH-9820 162

7-19. Adjusting the work clamp positions

The positions of the work clamps relative to the needle plate can be adjusted forward, back and sideways.

* Adjust the left and right work clamps so that they are both positioned at an equal distance from the needle drop position.

(The following describes how to adjust the position of the right-side work clamp.)

(Viewed from directly to the right)

1. Loosen the socket bolt (1), and then move the position of the clamp arm (2) forward or back to adjust.

2. Next, adjust so that the side of work clamp R (3) is parallel to the side of the needle plate (4).

3. Once adjustment is complete, tighten the socket bolt (1).

1. Loosen the two set screws (5), and then adjust the sideways position of the clamp lever (6).

2. Once adjustment is complete, tighten the two set screws (5).

* Adjust the position for the left-side work clamp in the same way.

0511B

7. ADJUSTMENTS

RH-9820

163

7-20. Adjusting the positions of the work clamp plates

Adjust the positions of the work clamp plates (3) so that the throat plate (1) and needle plates (2) do not touch during sewing.

The standard adjustment is when there is a gap of 0.8 mm between the throat plate (1) and the needle plates (2) (when the

cutting space is set to "0").

* Carry out adjustment for both the left and right work clamps. (The adjustment method described below is for the position of

the right-side work clamp plate (3).)

* Carry out adjustment with the work clamp plates (3) installed.

1. Use the parameter settings to set the cutting space to “0”.

(Refer to “5-3-1. Parameter list” in the instruction manual.)

* If you press shortcut key 3 (4), you can then change

the value simply by pressing the / keys (5).

2. Press the TEST key (6) to turn on test mode, and then

start test operation. (Refer to “5-4. Checking the sewing

pattern in test mode” in the instruction manual.)

3. Press and hold the start switch (7) until the feed base

moves to the position where the straight section of the

sewing shape is sewn, and then release the start switch

(7).

Straight section

(when using a 2-pedal

foot switch)

Narrow gap

Wide gap

(Viewed from the front) (Viewed from directly above)

4. Check that there is a gap of 0.8 mm between the throat plate (1) and needle plate R (2).

5. If it is not 0.8 mm, remove feed bar cover L (8) and feed bar cover R (9), loosen the nut (10), and then turn the bolt (11) to

adjust the gap.

6. Once adjustment is complete, tighten the nut (10).

7. Press the RESET key (12), and then press the STOP switch (13) to end test mode.

* Adjust the gap between the throat plate (1) and needle plate L in the same way.

0462B

0512B

0513B

7. ADJUSTMENTS

RH-9820 164

7-21. Adjusting the cloth opening amounts

Adjust so that the opening amounts for the left and right work clamp plates (1) are equal.

* The cloth opening amounts should always be 0.8 mm or more on each side.

1. Press the TEST key (2) to turn on test mode, and then

start test operation. (Refer to “5-4. Checking the sewing

pattern in test mode” in the instruction manual.)

(When using a

2-pedal foot switch)

2. Depress the start switch (3).

* Check that the feed base moves and that the work

clamp plates (1) at left and right both open. This

opening amount is <a>.

Cloth opening amount = - <a>

3. Use calipers to measure <a> (at both left and right).

4. Turn off the power for the sewing machine.

* The gap <a> will become wider. This opening amount is .

5. Lower the work clamps, and then use calipers to measure (at both left and right).

(Cloth opening amount = - <a>)

6. Calculate the cloth opening amounts for both sides.

7. Carry out adjustment if the two cloth opening amounts are not the same, or if the cloth opening amount at either side is lower

than 0.8 mm. (Refer to following page.)

0517B

0515B

0516B

7. ADJUSTMENTS

RH-9820

165

8. Loosen the screw (4).

9. Insert a screwdriver into the notch in the side of the feed base, and turn the adjustment screw (5) to adjust.

10. After tightening the screw (4), measure the opening amounts once more.

11. Repeat steps 2 - 10 until the left and right cloth opening amounts are equal to each other.

7-22. Adjusting the upper thread feeding amount

It is necessary for enough of an upper thread feeding amount to be maintained so that the amount of upper thread is sufficient

for stitches to be formed accurately at the sewing start.

NOTE:

The thread take-up lever (1) operates at the same time as sewing ends, and it stops operating at the same time as the feed

base starts moving when the start switch is pressed.

More thread

Less thread

1. Loosen the screw (2).

2. Move the thread take-up lever (1) up or down to adjust the upper thread feeding amount.

3. Once adjustment is complete, securely tighten the screw (2).

0477B

0518B

7. ADJUSTMENTS

RH-9820 166

7-23. Adjusting the lower thread feeding amount <-01 specifications only>

It is necessary for enough tension to be applied to the lower thread during the time from when the upper thread is picked up by

the eye looper at the first stitch until spreader L finishes opening, without the lower thread being pulled out by the thread nipper,

so that the first stitch can be sewn correctly at the sewing start.

1. After automatic sewing is finished, switch to manual mode

and then press the start switch. (Refer to “7-6. Manual

sewing (manual mode)” in the instruction manual.)

2. Turn the upper shaft pulley and check the condition of the

lower thread.

3. Turn off the power, and then tilt back the machine head.

4. Loosen the two screws (1), and then move lower thread

guide C (2) in the direction of the arrow to adjust.

* If it is moved to the right, the lower thread feeding

amount will increase, and if it is moved to the left, the

amount will decrease.

5. Once adjustment is complete, securely tighten the two

screws (1).

Becomes less Becomes more

7-24. Replacing and adjusting the upper movable knife

7-24-1. Replacing the upper movable knife

1. Remove the screw (1), and then remove the upper

movable knife (2).

2. Install the new upper movable knife with the screw (1).

<-00 and –01 specifications> <-02 specifications>

<-00 and -01 specifications> <-02 specifications>

0401B

0399B

7. ADJUSTMENTS

RH-9820

167

7-24-2. Adjusting the upper movable knife

The upper movable knife (1) is adjusted so that only the upper thread that is in front of looper L (2) is cut. If two of the upper

thread loops (front and back) are cut, the upper thread trailing length will become too short and skipped stitches may occur at

the sewing start.

* If this adjustment is carried out in manual mode, the upper thread trimming operation can be checked step by step, which

will make adjustment easier.

1. Turn the upper shaft pulley to set the needle to the lowest

position at the outside sewing position.

2. Loosen the screw (3), and then adjust the gap <a>

between the tip of the upper movable knife (1) and the

needle to 0.1 - 0.4 mm.

3. Turn the upper shaft pulley to set the needle to its highest

position (needle up stop position) at the outside sewing

position.

4. Loosen the screw (4), and then adjust the position of the

upper movable knife (1) so that it is in between the throat

plate (5) and spreader L (6) without touching either of

them.

5. Move the upper movable knife (1) sideways by hand and

check that it does not touch either the throat plate (5) or

spreader L (6).

6. Once adjustment is complete, tighten the screws (4) and

(3) in that order.

NOTE: Upper thread trimming timing

<-00 and -01 specifications>

When the upper movable knife (1) has returned to its original

position, the upper thread is trimmed at position A.

<-02 specifications>

When the upper movable knife (1) starts moving, the upper

thread is trimmed at position B.

<-00 and -01 specifications> <-02 specifications>

0403B

(Viewed from directly to the right)

0565B

7. ADJUSTMENTS

RH-9820 168

7-24-3. Adjusting the position of the thread trimmer lever bracket

The position of the needle must be adjusted so that it does not obstruct the upper movable knife when it is at the maximum

zigzag width for the outside sewing position.

1. Loosen the nut (1).

2. Turn the screw (2) to adjust <a> in the illustration to 12

mm.

3. Turn the looper base (3) and check that the thread trimmer

lever bracket (4) moves underneath the thread trimmer

hammer (5) without obstructing any other parts.

4. Once adjustment is complete, securely tighten the nut (1).

(Viewed from the front)

0545B

0546B

7. ADJUSTMENTS

RH-9820

169

7-25. Replacing and adjusting the movable knife and fixed knife (for the

lower thread and gimp) <-01 specifications>

7-25-1. Replacing the movable knife and fixed knife

1. Remove the two screws (1), and then remove work clamp

plate U (2).

2. Remove the three screws (3), and then remove the

movable knife (4).

3. Install the new movable knife, and then tighten the three

screws (3).

4. Remove the two screws (5), and then remove the fixed

knife (6).

5. Install the new fixed knife (6), fixed knife plate spring (7),

fixed knife plate spring U (8) and thread guide plate (9) on

top of each other in that order, and then tighten the two

screws (5).

* After replacing the knives, carry out the adjustments from

“7-25-2. Adjusting the cutting pressure” to “7-25-5.

Adjusting the thread handler”. Once adjustment is

complete, install work clamp plate U (2).

0519B

0520B

7. ADJUSTMENTS

RH-9820 170

7-25-2. Adjusting the cutting pressure

Adjust the cutting pressure to a suitable pressure so that the threads are trimmed cleanly.

NOTE:

Do not apply excessive pressure. Excessive pressure will cause the knives to become worn or damaged.

1. Push the thread trimmer arm (1) as far as it will go in the direction of the arrow [A].

2. Loosen the two screws (2).

3. With the thread trimmer arm (1) pushed as far as it will go, move the fixed knife setting bracket (6) along the guide groove in

the direction of arrow [B] to adjust so that the position where the tip of the fixed knife (3) and the movable knife (4) first start

touching is immediately above the mark (5).

4. Once adjustment is complete, securely tighten the two screws (2).

7-25-3. Adjusting the meshing amount

1. Turn the thread trimmer link lever (1) in the direction of the

arrow until it touches the screw (2).

2. Loosen the socket bolt (3).

3. Adjust the position of the thread trimmer arm (7) so that

the tip of the fixed knife (6) is directly above the index mark

(5) on the movable knife (4).

4. Once the adjustment is complete, securely tighten the

socket bolt (3).

NOTE:

• When tightening the socket bolt (3), check that the thread

trimmer lever arm (8) and the thread trimmer arm (7) move

smoothly with no play.

• If the meshing amount is too small, problems with the

lower thread nipper will occur and the thread will be pulled

out at the sewing start.

0522B

0521B

7. ADJUSTMENTS

RH-9820

171

7-25-4. Adjusting the thread nipper assembly and opener

The lower thread must pass through thread nipper D (1) and the gimp thread must pass through thread nipper U (2). Therefore,

check that the thread nipper assembly (3) is installed in the correct position and that the thread nipper opener (4) moves

correctly.

NOTE:

The lower thread must be securely held by thread nipper D (1) at the sewing start.

(Side view of thread nipper assembly (3) and the thread handler (7) viewed from position A)

1. Loosen the two screws (5), and then move the thread nipper assembly (3) along the dotted line [A] in the illustration in the

direction of the arrow [B] to adjust.

* Adjust so that the gap <a> between the thread nipper assembly (3) and the thread handler (7) is as narrow as possible

without the two parts touching when the thread trimmer arm (6) is turned in the direction of the arrow [C].

NOTE:

• If the gap <a> is too wide, problems with the lower thread nipper will occur and the thread will be pulled out at the sewing

start.

• If the thread nipper assembly (3) is installed at an angle, thread nipper D (1) may touch the throat plate and fail to open,

and problems with the lower thread nipper will occur and the thread will be pulled out at the sewing start.

0523B

7. ADJUSTMENTS

RH-9820 172

2. The lower thread must go over the projection (9) on thread

nipper M (8) and be held securely. To make sure this

happens, check that the operations in (a), (b) and (c)

below are all correct.

(a) Thread nipper D (1) should open by 0.3 mm or more

when the thread nipper opener (4) pushes down on the

opener pin (10).

(b) Thread nipper D (1) should close immediately before

the thread is trimmed.

0.3 mm

or more

trimmer arm (6) returns after thread trimming, so that

the thread nipper opener (4) returns without going over

the opener pin (10).

3. Once adjustment is complete, securely tighten the two

screws (5).

0552B

0553B

0554B

7. ADJUSTMENTS

RH-9820

173

7-25-5. Adjusting the thread handler

The lower thread and gimp are securely separated and guided by the thread handler (1), after which the lower thread needs to

go smoothly into thread nipper D (2), while the gimp needs to go smoothly into thread nipper U (3).

NOTE: Principle of the thread handler

When the thread trimmer arm operates, the throat plate (4) turns 45 degrees. This causes the gimp to sit on top of the

projection (5) of the throat plate (4) so that a difference in height is created between the lower thread and the gimp, and a

triangular shape (A) is formed between the two threads and the final stitch. The thread handler (1) goes into this triangular

shape (A) to separate the lower thread and gimp.

Gimp Lower thread

Gimp

Material

Lower thread

Gimp

Lower thread

* If this adjustment is carried out in manual mode, the lower thread trimming operation can be checked step by step, which will

make adjustment easier.

1. Use the parameter settings to set the stitch pitch to 2.0 mm and reduce the total number of stitches. (Refer to “5-3-1.

Parameter list” in the instruction manual.)

2. In manual mode, depress the start switch, and then turn the upper shaft pulley to sew manually as far as the final stitch.

(Refer to “7-6. Manual sewing (manual mode)” in the instruction manual.)

3. With the needle bar at the needle up stop position, depress the start switch one press at a time.

* The thread trimming operation will be carried out one step at a time.

4. Loosen the pan screw (6) and the screw (7), and then use the pan screw (6) as a pivot to turn the thread handler (1) to

adjust.

5. Once adjustment is complete, securely tighten the pan screw (6) and the screw (7).

NOTE:

If the height of the throat plate (4) has been changed, the triangular shape (A) defined by the final stitch, lower thread and

gimp will change, and so you should adjust the thread handler (1).

0525B

Lower

thread

7. ADJUSTMENTS

RH-9820 174

7-26. Replacing and adjusting the movable knife and fixed knife (for the

lower thread and gimp) <-02 specifications>

7-26-1. Replacing the movable knife and fixed knife

1. Remove the two screws (1), and then remove work clamp

plate U (2).

2. Remove the nut (3).

3. Remove the shoulder screw (4), and then remove

movable knife L (5) and movable knife R (6).

4. Install the new knives, and then install the shoulder screw

(4).

5. Adjust the cutting pressure (see below), and then tighten

the nut (3).

6. Install work clamp plate U (2).

7-26-2. Adjusting the cutting pressure

Adjust the cutting pressure to the minimum pressure at which

thread trimming can be carried out cleanly.

1. Loosen the nut (1).

2. Turn the shoulder screw (2) to adjust the cutting pressure.

NOTE:

If the shoulder screw (2) is tightened as far as it will go,

the movable knives will no longer operate. Gradually

loosen the shoulder screw (2) to a point where the

movable knives turn smoothly.

3. Once adjustment is complete, securely tighten the nut (1).

0527B

0526B

7. ADJUSTMENTS

RH-9820

175

7-26-3. Adjusting the movable knife installation position

(Viewed from directly above)

(Viewed from the side at position B)

1. Remove work clamp plate U. (Refer to “7-26-1. Replacing the movable knife and fixed knife”.)

2. Loosen the screw (1).

3. Turn the movable knife driving plate (4) so that the tip [A] of movable knife R (3) and the corner [C] of the needle plate (2) are

aligned.

4. Turn thread trimmer lever arm B (7) until the thread trimmer link lever J assembly (5) touches against the screw (6), and then

tighten the screw (1).

5. Once adjustment is complete, install work clamp plate U.

NOTE:

Check that the movable knife driving plate (4) and thread trimmer lever arm B (7) turn smoothly with no play.

0528B

(Viewed from underneath)

7. ADJUSTMENTS

RH-9820 176

7-26-4. Adjusting the position of the sub clamp

Trimming of the lower thread and gimp is carried out when the work clamps rise. The sub clamp ensures that the material does

not move during thread trimming, in order to maintain a stable thread length after trimming.

1. Loosen the socket bolt (1).

2. Adjust the installation position of the sub clamp wrist (4)

with respect to the article being sewn so that the button

clamp (2) moves above the needle plate (3).

3. Once adjustment is complete, securely tighten the socket

bolt (1).

0530B

7. ADJUSTMENTS

RH-9820

177

7-26-5. Differences from older models

RH-9820 RH-981A

Knife installation

position

* In order to ensure

interchangeability with the

RH-981A hammer, install the

hammer spacer (SA6800-001) to

the hammer mounting bracket

when using a S-- hammer. (Refer

to “7-16-1. Replacing the knife”.)

* Because there is a shift of

10 mm, the S-- hammer is

offset.

Needle plate

position viewed

from work clamp

plate

Advantage： The left and right movable knives do not

need to be replaced.

Note：The feed base position when the material is set

back varies depending on the size.

Advantage： The feed base position when the

material is set back s the same

for all sizes.

L specifications

changed

(replacement

parts)

・Needle plate L and R

・Work clamp L and R

Total 4 points

・Needle plate L and R

・Movable knife L and R

・Specification harness

・Work clamp L and R

Total 7 points

Other settings Settings for memory switch No. 851 changed －

-00,-01

-02: L2634, L3442

-02:L1422,L2230

L1826

(Position when S

hammer is being used)

-00,-01

-02: L5, L6, L7

-02: L1, L2, L3, L4

(Position when S

hammer is being used)

L5, L6, L7

L1, L2, L3, L4

L3, L6

L4, L7

1189B 1190B

1192B

Knife positions are aligned.

L3442

1191B

The maximum

lengths for each

size are aligned with

point P.

8 (Cutting range)

L2634

L2230

L1826

L1422

7. ADJUSTMENTS

RH-9820 178

L1422 L2230 L2634

L3442

NOTE:

When the material is set back and when the knife is lowered, the position of the feed base varies depending on L specifications (size).

Knife

position

shifted

Feed base shifted Feed base shifted

L1826

Cutting

range

Cutting

range Cutting

range

Cutting

range Cutting

range

7. ADJUSTMENTS

RH-9820

179

0547B

7-27. Adjusting the gimp trailing length <-02 specifications only>

The gimp is pressed against the material by means of the twisting of the first 2 - 3 stitches at the sewing start, and is then pulled

out continuously. Because of this, if strong tension is applied to the gimp when the feed base is at the sewing position and the

gimp trailing length (<a> in the illustration below) becomes extremely short, the gimp may be pulled out of the stitches.

The gimp should be adjusted to as short a length as possible which will still allow the gimp to be securely wound around the

stitches at the sewing start and leave a length protruding from above the stitches.

NOTE: Principle of gimp pulling

When the looper base (1) turns back from 180 degrees to 0 degrees after the gimp has been trimmed, gimp thread guide

C-J (2) pulls the gimp to make it come out.

Adjustment of the gimp trailing length is necessary in the following cases.

• When the sewing length has been changed (the gimp is trimmed at the feed base home position, so the length of

will change. As a result, the gimp trailing length <a> will also change.)

• When the type of gimp and the gimp tension have been changed (the gimp trailing length <a> will change.)

Gimp is trimmed

When looper base is turned 180 degrees When looper base has returned to 0 degrees

(Viewed from directly above)

1. Loosen the screw (3).

2. Move gimp thread guide J (4) in the direction of the arrow

[A] to adjust so that 2 - 4 mm of the gimp protrudes from

the seam at the sewing start.

3. Once adjustment is complete, securely tighten the screw

(3).

The gimp trailing length at the sewing end is uniform because of

thread trimming.

0548B

7. ADJUSTMENTS

RH-9820 180

7-28. Adjusting the position of the lower thread presser <-02 specifications only>

Adjust the lower thread presser (1) so that it securely holds the lower thread.

(Viewed from the front)

(Viewed from directly above) (Viewed from directly to the right)

1. Loosen the screw (4) and move the lower thread presser (1) up or down to adjust so that its top projects approximately 0.5

mm from the top of the thread groove (3) in the throat plate (2).

2. Check that the lower thread presser (1) does not cover the groove at the front of the throat plate (2).

* If the groove is covered, loosen the nut (5) and then turn the screw (6) to adjust.

3. Check that the front of the throat plate (2) and the lower thread presser (1) are overlapping by 0.5 - 1.0 mm after thread

trimmer lever bracket B (7) has operated.

* If adjustment is required, remove the lower thread presser base (8), loosen the nut (9), and then turn the screw (10) to

adjust.

4. Once adjustment is complete, tighten the nuts (5) and (9) that were loosened, and install the lower thread presser base (8).

0549B

0550B

0551B

7. ADJUSTMENTS

RH-9820

181

7-29. Adjustment of the phase for the take-up roller cam

1. Remove the upper cover (1).

2. Loosen the two set screws (3) of the take-up roller cam (2).

3. Remove the face plate (4).

4. Set the sewing machine to the stopped position.

5. Remove the rubber cap (5) and then insert the accessory pin (6).

* Check that the pin (6) is inserted into the groove (A) in the upper shaft crank at this time so that the upper shaft is secured

and cannot be turned.

6. Remove the upper shaft pulley (7).

7. Remove the rubber cap (8), and then insert the accessory pin (9) into the hole in the take-up roller cam (2).

8. Push the take-up roller cam (2) against the edge of the bearing (B), and then tighten one of the set screws (3).

9. Pull out the pins (6) and (9) and then tighten the other set screw (3).

10. Once adjustment is complete, install the rubber cap (8), rubber cap (5), upper shaft pulley (7), face plate (4) and upper cover (1)

in that order.

0751B

7. ADJUSTMENTS

RH-9820 182

7-30. Adjusting the needle bar and looper base turning center

The turning center for the needle bar and the looper base is accurately adjusted at the time of shipment from the factory.

If the sewing machine has been disassembled (such as when replacing the needle bar gear block unit, needle bar or looper base),

adjust the position of needle bar bush U (2) so that the clearance <a> between the needle and the tip of eye looper (1) remains

uniform while the looper rotates through 360°.

NOTE:

Before adjusting the position of the needle bar bush U (2), check that there is no play in the needle bar gear block and the

looper base. If there is any play, adjust while referring to “6-2. Needle bar mechanism (1): Adjusting the pressure of the needle

bar gear block” and “6-8. Looper base mechanism: Looper base pressure adjustment”.

Needle

Eye looper(1)

When looper base is at 0° When looper base is at 180°

Index mark

When looper base is at 90° When looper base is at 270°

1. Loosen the two bolts (3), and then remove the needle bar guard (4).

2. Turn the upper shaft pulley until the tip of the eye looper (1) is aligned with the center of the needle.

3. Turn the looper base (5) by hand and check that the distance A between the tip of eye looper (1) and the needle when the looper

base (5) is turned to 0° is the same as the distance B when the looper base is turned to 180°.

4. If there is a large difference between distance A and distance B, loosen the three bolts (6) and move the needle bar (7) gently

forward or back to adjust the position of needle bar bush U (2). Tighten the bolts (6), and then repeat the check in step (3).

5. Turn the looper base (5) by hand and check that the distance C between the tip of eye looper (1) and the needle when the

looper base (5) is turned to 90° is the same as the distance D when the looper base is turned to 270°.

6. If there is a large difference between distance C and distance D, loosen the three bolts (6) and move the needle bar (7) gently to

the left or right to adjust the position of needle bar bush U (2). Tighten the bolts (6), and then repeat the check in step (5).

7. Carry out the check in step 3 once more.

NOTE:

• Once adjustment is finished, turn the upper shaft pulley and check that the needle bar moves gently up and down.

• If a sheet of paper is placed under the needle and the needle drop position is adjusted so that the needle makes a single hole in the

paper, the distance <a> between the needle and the tip of eye looper (1) will still not be uniform.

0753B0752B

7. ADJUSTMENTS

RH-9820

183

7-31. Adjusting the upper thread loosening amount

1. With the plunger (2) of the upper thread tension release solenoid (1) pushed all the way in, loosen the nut (5) and turn the bolt

(3) to adjust so that the clearance between the end of the bolt (3) and the solenoid setting plate (4) is 13.8 mm.

2. With the upper thread tension release solenoid (1) installed to the upper cover (6), check that the opening amount for the

tension discs (7) is 0.5 - 1 mm when the plunger (2) is pushed all the way in.

* Section (A) should be sealed at this time.

0754B

7. ADJUSTMENTS

RH-9820 184

7-32. Adjusting the lower thread loosening amount

1. Loosen the nut (1).

2. Turn the lower thread release plate (2) by hand or push the plunger (3) of the tension release solenoid from the back to turn the

lower thread release plate (2) until the tension release pin (4) is sitting on stepped part [A].

3. Turn the tension stud D (6) to adjust the height so that the opening amount for the tension discs (5) is 1 ± 0.3 mm at this time.

4. Tighten the nut (1).

0781B

7. ADJUSTMENTS

RH-9820

185

7-33. Adjusting the looper base home position

NOTE:

Before carrying out this adjustment, check that the adjustments in “6-9. Needle bar rocking mechanism: Belt tension adjustment

for driving looper belt” have been carried out correctly.

1. Remove the left and right work clamp plates (Z).

2. While holding down the and keys (1), push the

POWER switch at the ON side (2).

3. Press the start switch (3).

The motors will carry out home position detection, and then

the sewing machine will switch to home position adjustment

mode.

* At this time, “X” will appear in the display (A).

4. Press the or key (4) to change the display (A) to “θ”.

* When “θ” is displayed, the X and Y feed motors will be

turned off, so that the feed base can be moved by hand.

0749B

0763B

0972B

0819B

(A)

7. ADJUSTMENTS

RH-9820 186

5. Press the or key (1) to change the offset value (B).

The looper base (5) will move as the keys are pressed. Do

this until the looper base reference line (0°) is aligned

with the bed reference line <a>.

* The setting range is -12.86 ° - +12.86° (in units of 0.64°).

6. Press the ENTER key (6).

The home position detection operation will be carried out,

and the offset value (B) will be saved.

NOTE:

If you continue to the next step without pressing the

ENTER key (6), the offset value will not be changed.

7. Check that the bed reference line <a> and the looper base

reference line (0°) are aligned.

* If they are not aligned, repeat steps 5 and 6 until they

are aligned.

8. Press the TEST key (7).

Home position adjustment mode will end and the sewing

machine will return to home position standby.

1194B

0764B

0733B

(B)

7. ADJUSTMENTS

RH-9820

187

7-34. Adjusting the feed base X home position and Y home position

NOTE:

* Before adjusting the X home position, check that the adjustment in “6-16. X feed mechanism: Standard installation position for

motor unit (idle gear adjustment)” has been carried out correctly.

* Before adjusting the Y home position, check that the adjustment in “6-7. Y feed mechanism: Standard installation of motor unit”

has been carried out correctly.

1. Remove the left and right work clamp plates (Z).

2. While holding down the and keys (1), push the

POWER switch at the ON side (2).

3. Press the start switch (3).

The motors will carry out home position detection, and then

the sewing machine will switch to home position adjustment

mode.

* At this time, “X” will appear in the display (A).

4. Press the or key (4) as necessary to change the

display (A) so that “Y” appears.

* “X” or “Y” should be displayed while this adjustment is

carried out.

[When “X” is displayed]

The motor (θ) for driving the looper base will be turned off,

so that the looper base and needle bar gear block can

be moved by hand.

[When “Y” is displayed]

The X-feed motor, Y-feed motor and motor (θ) for driving

the looper base will all be turned on, so that the looper

base and needle bar gear block cannot be moved by

hand.

0749B

0763B

0972B

0819B

(A)

(B)

7. ADJUSTMENTS

RH-9820 188

5. [Adjusting the X home position]

(When the looper base is turned 0°)

(When the looper base is turned 180°)

Carry out the following adjustments so that the distances <a> (when the looper base is turned 0°) and (when the looper

base is turned 180°) between the end of the projection on the throat plate (5) and the sides of feed base cover R (6) and feed

base cover L (7) on the feed base are equal.

5-1. Turn the looper base by hand and measure the distances <a> and .

5-2. When you press the or key (1) to change the

offset value (B), the feed base (7) will move as the keys

are pressed. Repeat this step until distances <a> and

are equal.

* The setting range is -2.00 - +2.00 mm (in units of 0.05

mm).

[Adjusting the Y home position]

Carry out the following adjustments so that the distance <c>

between the rear of the feed base (7) and the hollow in the bed

(8) is 18 ± 0.2 mm.

5-3. When you press the or key (1) to change the

offset value (B), the feed base (7) will move as the keys

are pressed.

* The setting range is -2.00 - +2.00 mm (in units of 0.05

mm).

(Continued on next page)

0765B

0766B

0818B

7. ADJUSTMENTS

RH-9820

189

6. Press the ENTER key (9).

The home position detection operation will be carried out,

and the offset value (B) will be saved.

NOTE:

If you continue to the next step without pressing the

ENTER key (9), the offset value will not be changed.

7. Check the results of the adjustments.

* If the adjustments are not correct, repeat steps 5 and 6.

* To continue with another adjustment, repeat the

adjustment procedure from step 4.

8. Press the TEST key (10).

Home position adjustment mode will end and the sewing

machine will return to home position standby.

7-35. Adjusting the needle up signal home position for the upper shaft and

upper shaft motor

NOTE:

• Before carrying out this adjustment, check that the adjustments in “6-18. Upper shaft motor mechanism: Standard installation of

upper shaft motor unit and belt tension adjustment)” and “6-10. Lower shaft mechanism: Belt (upper shaft - lower shaft)

installation and belt tension adjustment” have been carried out correctly.

• After carrying out this adjustment, be sure to carry out the procedure in “7-36. Adjusting the upper shaft stop position”.

1. Remove the face plate (1) and the upper cover (2).

2. Remove the rubber cap (3).

3. Insert the accessory pin (4) into the groove (6) in the balance collar from the hole (5) in the arm to stop the upper shaft from

turning. (Upper shaft: 22.5° position)

0768B

0767B

7. ADJUSTMENTS

RH-9820 190

4. While holding down the key (7), push the POWER

switch at the ON side (8).

The mode will switch to input checking mode.

5. Press the key (7) or key (9) to set the checking

signal (A) to “18 (needle up signal)”.

6. Tilt back the machine head and remove the motor cover (11)

from the upper shaft motor (10).

7. Loosen the bolt (12) for the needle up magnet of the motor

by 90° only.

NOTE:

Do not loosen the screw by more than 90°. If it is

loosened too much, the parts may touch the P. C. board

and damage may result.

8. Move the position of the slot (13) to the point where the

panel display (B) switches from “ON” to “OFF”, and tighten

the bolt (12) at that point.

9. Press the POWER switch at the OFF side (14) to turn off the

power.

(B)

0771B

(A)

0769B

0784B

0770B

0784B

7. ADJUSTMENTS

RH-9820

191

7-36. Adjusting the upper shaft stop position

Adjust the stop position so that upper thread loops are maintained when the upper thread is trimmed.

1. While holding down the and keys (1), push the

POWER switch at the ON side (2).

2. Press the start switch (3).

The motors will carry out home position detection, and then

the work clamp will be lowered to the ready position and the

sewing machine will switch to upper shaft stop position

adjustment mode.

* In upper shaft stop position adjustment mode, the offset

value (A) is displayed.

3. Press the start switch (3) again until the upper shaft begins

to move.

4. After the upper shaft stops, check that the arm reference line

<a> and the upper shaft pulley reference line are

aligned.

[If they are not aligned]

Press the or key (4) to change the offset value (A),

and then repeat step 3.

* The setting range is -5 ° - +10° (in units of 1°).

[If they are aligned]

Continue to the next step.

5. Press the ENTER key (5).

The offset value will be stored.

NOTE:

If you continue to the next step without pressing the

ENTER key (5), the offset value will not be changed.

6. Press the TEST key (6).

Upper shaft stop position adjustment mode will end and the

sewing machine will return to home position standby.

0973B

(A)

0974B

0820B

0772B

7. ADJUSTMENTS

RH-9820 192

7-37. Installing (replacing) the sub clamp on the left side

If necessary, the sub clamp can be removed from the right side and can be installed on the left side instead. In this case, the

following optional parts are required.

To install the sub clamp on the left side, first have the following

option parts ready.

Ref. No. Code Qty. Part name

(34) SA7152001 1 Sub clamp wrist L

(9) (10) SA5683001 2 Air hose (outer dia. 4

mm, inner dia. 2.5 mm,

length 750 mm)

* Be sure to remove the stickers (A) before using the air

hoses (9) and (10).

(Top)

1. Stop the air and then bleed the air. (Refer to “3-16. Adjusting the air pressure” in the instruction manual.)

2. Remove the feed base unit (1) from the bed. (Refer to “5-3. Feed mechanism”.)

3. Disconnect the air tubes (2) and (3) from the joints (4) and (5).

4. Remove retaining ring C (6).

(Continued on next page)

1168B

1167B

7. ADJUSTMENTS

RH-9820

193

(Bottom)

(Viewed from above)

5. Remove the two screws (7), and then remove the sub clamp cylinder assembly (8).

6. Replace the air hoses (2) and (3) with the optional air hoses (9) and (10).

7. Remove retaining ring C (11) and pull out the shaft (12).

8. Insert the shaft (12) into the sub clamp S holder (13) in the direction shown in the illustration, and then install retaining ring C

(11).

9. Set the joint (14) and the cylinder rod (15) so that they are facing as shown in the illustration.

(Top) (Bottom)

10. Insert the shaft (16) of the sub clamp connecting rod into the hole in the feed base, and then install retaining ring C (6).

11. Tighten the two screws (7).

1169B

1170B

7. ADJUSTMENTS

RH-9820 194

(Top)

12. Route the tubes as shown in the illustration, and then connect the air hose (9) to the joint (4) and the air hose (10) to the joint

(5).

13. Secure the air hoses (9) and (10) in four places using the four bead bands (17) as shown in the illustration.

14. Loosen the socket bolt (18), and then remove the sub clamp wrist (19).

15. Remove the spring (20).

16. Remove retaining ring C (21), and then remove the sub clamp arm (22).

17. Remove retaining ring C (23), loosen the two set screws (24), and then remove clamp support shaft J (25) in the direction of

the arrow.

(Continued on next page)

1171B

1172B

(Viewed from the underside)

Work clamp plate R assembly

7. ADJUSTMENTS

RH-9820

195

18. Remove retaining ring C (26), loosen

the two set screws (27), and then

remove the clamp support shaft (28)

in the direction of the arrow.

19. Insert clamp support shaft J (25) in the direction of the arrow, and then install retaining ring C (26).

20. Place the sub clamp arm (22) onto clamp support shaft J (25) as shown in the illustration, and then install retaining ring C (21).

21. Tighten the two set screws (27) so that the clearance between the clamp shaft holder (29) and clamp lever L (30) is 2.5 ± 0.5

mm.

* Check that the sides of work clamp L (31) and needle plate L (32) are aligned at this time. If they are not aligned, loosen

the socket bolt (33) and adjust.

22. Install the button clamp (35) to the optional sub clamp wrist L (34).

23. Install sub clamp wrist L (34) to the sub clamp arm (22), and then secure it by tightening the socket bolt (36).

(Refer to “7-26-4. Adjusting the position of the sub clamp”.)

24. Install the spring (20) to the sub clamp arm (22) and the clamp shaft holder (29).

Work clamp plate L assembly

1173B

1174B

(Viewed from the underside)

Work clamp plate L assembly

(Viewed from the underside)

7. ADJUSTMENTS

RH-9820 196

Work clamp plate R assembly

25. Insert the clamp support shaft (28) in the direction of the arrow, and then install retaining ring C (23).

26. Tighten the two set screws (24) so that the clearance between the clamp shaft holder (37) and clamp lever R (38) is 2.5 ± 0.5

mm.

* Check that the sides of work clamp R (39) and needle plate R (40) are aligned at this time. If they are not aligned, loosen the

socket bolt (41) and adjust.

1175B

(Viewed from the underside)

8. ELECTRICAL MECHANISM

197 RH-9820

8. ELECTRICAL MECHANISM

DANGER

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet

before opening the cover of the control box. Touching areas where high voltages are present can result in severe

injury.

8-1. Precautions while carrying out adjustments

Electric shocks

High voltages can remain in large-capacity capacitors for up to 5 minutes in some circumstances, even when the power has

been turned off. Accordingly, wait at least 5 minutes after turning off the power before carrying out the following operations.

• Opening and closing the control box

• Replacing fuses

• Inserting and disconnecting connectors

• Measuring resistance values

• Any other tasks that may involve touching components inside the control box

Some inspection items require the control box to be open when the power is turned on and voltages are measured.

At such times, be extremely careful never to touch anywhere other than the specified locations. In addition, note that high

voltages may remain for up to 5 minutes after the power is turned off.

Injury

Be careful not to touch metallic objects such as the heat sink and cover when connecting and disconnecting connectors and

making measurements.

Be sure to note the following cautions when opening the control box to carry out inspections and adjustments.

8. ELECTRICAL MECHANISM

198

RH-9820

8-2. Inside the control box and operation panel structure

Main P.C. board

Secured to the side. This is the P.C. board that controls sewing machine operation.

PMD P.C. board

Secured to the base plate. This P.C. board drives the pulse motors and solenoids.

Power supply motor P.C. board

Secured to the rear. This P.C. board generates the voltages that are required for control, and drives the upper shaft motor.

There are 8 fuses on this P.C. board.

Filters (3 places)

The filters at the air intake slots in the cover and control box (2 places) should be cleaned about once a month.

Conversion transformer (Two types are used depending on the power supply voltage specifications.)

This breaks down the power supply voltage into the voltages that are required for control operations.

NF P.C. board

This eliminates the electrical interference that is generated by the power supply line.

Panel P.C. board

Secured to the inside of the operation panel. This P.C. board is used for displaying the sewing machine status and for input

operations.

Control box Operation panel

Filter NF P.C. board

Conversion

transformer PMD P.C. board

1199B 0692B

Panel P.C. board

Power supply

motor P.C. board

Main P.C. board

Filter

8. ELECTRICAL MECHANISM

199 RH-9820

8-3. Description of fuses

When replacing the fuses, be sure to use the fuses specified below.

If the components on the P.C. boards are damaged, the fuses may blow again soon even after they have been replaced.

No. Part name Parts code Symptom when fuse blows

F1 Fuse 15AFB

(Glass tube fuse 15A-250V) SA3794-001 Sewing machine motor does not operate and [E130] is

displayed.

F2 Fuse 6AFB

(Glass tube fuse 6A-250V) SA3759-001

Feed mechanism does not operate and [E201] or

[E211] is displayed.

θ pulse motor does not operate and [E220] is

displayed.

F3 Fuse 6AFB

(Glass tube fuse 6A-250V) SA3759-001

Thread trimming solenoid or digital tension/tension

release solenoid does not operate, and thread

trimming or thread tightening problems occur.

F4 Fuse 3AFB

(Glass tube fuse 3A-250V) 616167-001 Communication problem with PMD P.C. board and

[E403] is displayed.

F5 Fuse 3AFB

(Glass tube fuse 3A-250V) 616167-001 Power indicator does not illuminate and nothing

operates.

F6 Fuse 3AFB

(Glass tube fuse 3A-250V) 616167-001 DC fan motor does not operate and [E740] is

displayed.

Fuse 15AFB

(Glass tube fuse 15A-250V) SA3794-001 Power indicator does not illuminate and nothing

operates.

Power supply motor P.C. board

4590Q

8. ELECTRICAL MECHANISM

200

RH-9820

8-4. Description of connectors

A large number of problems are often caused by connectors that are not inserted correctly or which are contacting poorly.

As a result, check that all connectors are inserted correctly and that the pins and wires are crimped properly before carrying

out problem diagnosis.

8-4-1. Connector positions

Main P.C. board

*1 This is a spare signal for special orders.

1200B

8. ELECTRICAL MECHANISM

201 RH-9820

PMD P.C. board

Power supply motor P.C. board

0693B

4593Q

8. ELECTRICAL MECHANISM

202

RH-9820

Panel P.C. board

0694B

8. ELECTRICAL MECHANISM

203 RH-9820

8-4-2. Symptoms when there are poor connections

This divides the functions of the connectors into five sections, but some connectors have more than one function, so be sure

to refer to the trouble symptoms in other sections too.

Feed mechanism

Trouble symptom Connector No. and position

• The feed mechanism operates briefly but does not detect

the home position correctly.

• [E200] or [E210] is displayed.

• Problems with feed mechanism moving forward and back.

• [E210] or [E211] is displayed.

• Problems with feed mechanism moving to the left and right.

• [E200] or [E201] is displayed.

• Feed motor does not operate.

• [E200] is displayed.

θ pulse motor mechanism

Trouble symptom Connector No. and position

• The θ pulse motor operates, but the home position is not

detected correctly.

• [E220] is displayed.

• The θ pulse motor does not operate.

• [E220] or [E221] is displayed.

5241Q

4708Q

4709Q

4710Q

0755B

0756B

8. ELECTRICAL MECHANISM

204

RH-9820

Thread trimming mechanism

Trouble symptom Connector No. and position

• Gimp solenoid and lower thread solenoid do not operate.

(No error displayed)

Sewing operations

Trouble symptom Connector No. and position

• Power indicator does not illuminate and sewing machine

does not operate.

• Operation is unstable.

• [E403] is displayed when the power is turned on and the

sewing machine does not start.

5244Q

4717Q

0757B

8. ELECTRICAL MECHANISM

205 RH-9820

Other

Trouble symptom Connector No. and position

• DC fan motor does not operate.

• [E740] is displayed.

• Operation panel display is incorrect.

• Power indicator does not illuminate.

• Operation panel keys do not work.

• Backlight does not illuminate.

• Sewing machine does not start when foot switch is

depressed.

[Treadle]

Work clamp drops when depressed to the 1st step

Sewing machine starts when depressed to the 2nd step

[2 pedal]

Work clamp drops when work clamp switch (left) is depressed

Sewing machine starts when start switch (right) is depressed

• After the power is turned on, [E055] is displayed.

• After the power is turned on, [E450] is displayed.

5247Q

5248Q

5249Q

0758B

0759B

8. ELECTRICAL MECHANISM

206

RH-9820

8-5. Troubleshooting

8-5-1. Troubleshooting procedure

Carry out troubleshooting by following the procedure given below.

1 Checking connectors With the power turned off, check that all connectors are securely inserted while

referring to “8-4. Description of connectors”.

2 Diagnosis flowchart Carry out diagnosis while following the steps in “8-5-2. Diagnosis flowchart” on the next

page, and if a problem # is reached, continue to the next procedure.

3 Remedy Refer to “8-5-3. Remedy” for the item that corresponds to the problem #. Carry out the

inspections for the problems in the order of the numbers in the “Cause” column.

NOTE:

When replacing the fuses, be sure to use a fuse with the same material and rating.

8. ELECTRICAL MECHANISM

207 RH-9820

8-5-2. Diagnosis flowchart

Description of symbols

Setting and status

Switch operation

Continued on previous/next page

Judgment

OFF Power switch OFF

“Problem” symbol in the “8-5-3. Remedy” lists

0760B

8. ELECTRICAL MECHANISM

208

RH-9820

0761B

8. ELECTRICAL MECHANISM

209 RH-9820

0762B

8. ELECTRICAL MECHANISM

210

RH-9820

8-5-3. Remedy

Problem #1 The power indicator does not illuminate when the power is turned on.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. Malfunction of voltage select

harness ***

For 200V specifications

a. Check if there is a broken wire in the voltage

select harness.

b. Disconnect the connector at the transformer

side, turn on the power and then measure the

voltage at the cord.

(The wiring position may vary depending on

the voltage specifications.)

OK if same as wall outlet voltage

Voltage select harness ***

(*** indicates voltage

specifications)

2. Malfunction of transformer

100V, 200V, 220V specifications

380V, 400V specifications

• For 100V, 200V, 220V specifications

1) OK if there is continuity between pins

1-8, 2-8, 3-8, 4-8, 5-8 and 6-8 of the

8-pin connector coming out from the

transformer. [Fig. A]

2) OK if there is continuity between pins

1-2, 3-4 and 5-6 of the 6-pin connector

coming out from the transformer.

[Fig. C]

3) OK if there is continuity between pins

1-2 and 4-5 of the 5-pin connector

coming out from the transformer.

[Fig. D]

• For 380V, 400V specifications

1) OK if there is continuity between pins

1-3, 2-3, 3-4 and 3-6 of the 6-pin

connector coming out from the

transformer.

[Fig. B]

2) OK if there is continuity between pins

1-2, 3-4 and 5-6 of the 6-pin connector

coming out from the transformer.

[Fig. C]

3) OK if there is continuity between pins

1-2 and 4-5 of the 5-pin connector

coming out from the transformer.

[Fig. D]

Transformer

Voltage

specifications Pin No.

100V 6-8

110V 5-8

120V 4-8

200V 3-8

220V 2-8

240V 2-7

H220V 3-6

380V 2-3

400V 1-3

4876Q

4879Q

4877Q

4878Q

8. ELECTRICAL MECHANISM

211 RH-9820

Problem #1 The power indicator does not illuminate when the power is turned on.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

3. Malfunction of power cord Disconnect connector P9 (ACIN) on the power

supply motor P.C. board from the circuit board,

turn on the power, and then measure the voltage

between pins 3-4 of the cord-side connector.

OK if same as wall outlet voltage

After inspecting, turn off the power and insert

connector P9.

4. Blown fuse Remove fuses F7 and F8 and check the

continuity.

OK if continuity

(If there is no continuity, replace the fuse and

then carry out the inspections in 5. )

Glass tube fuse

15A-250V

5. Malfunction of power supply

motor P.C. board

Disconnect connector P17 (M-MOTOR) of the

main P.C. board, turn on the power, and then

measure the voltages between the pins at the

cord-side connector.

OK if the voltages are as shown in the table

below.

After measuring, turn off the power, wait 5

minutes or more and then insert P14.

Power supply motor P.C.

board

6. Malfunction of main P.C. board With connector P17 (M-MOTOR) inserted into

the main P.C. board, turn on the power and then

measure the voltages between the pins at the

cord-side connector.

OK if the voltages are as shown in the table

below.

After measuring, turn off the power.

Main P.C. board

7. Malfunction of panel P.C. board Check that connector P1 (PANEL) is inserted

into the main P.C. board, and that connector

CN5 (MAIN) is inserted into the panel P.C.

board.

Panel P.C. board

Panel harness

Pin Nos.

+ side

−

side

Normal

voltage

1 3 +5V

2 4 +5V

6 5 +24V

7 5 +24V

Pin Nos.

+ side

−

side

Normal

voltage

1 3 +5V

2 4 +5V

6 5 +24V

7 5 +24V

4880Q

5085Q

8. ELECTRICAL MECHANISM

212

RH-9820

Problem #2 When the power is turned on, an error code is displayed.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. If [E025] or [E035] is displayed,

the foot switch is still depressed.

1) Check if the foot switch is still depressed.

2) Check that the setting for memory switch No.

050 is correct while referring to “2-3. Memory

switch setting method (Advanced)”.

3) Check if there is a harness short-circuit.

4) Check that connector P6 (FOOT) is inserted

into the main P.C. board.

5) Check the switch input while referring to “2-6.

Input checking method”.

Treadle unit

2-pedal foot switch

2. If [E055] is displayed, there is a

malfunction of the machine head

safety switch.

1) Check that the machine head safety switch is

OFF.

2) Check that connector P9 (HEAD-SW) is

inserted into the main P.C. board.

3) Check if there is a harness short-circuit.

4) Check the machine head safety switch input

while referring to “2-6. Input checking

method”.

Machine head safety switch

3. If [E065] is displayed, one of the

keys on the operation panel is

still depressed.

1) Check that connector P1 (PANEL) is

inserted into the main P.C. board, and that

connector CN5 (MAIN) is inserted into the

panel P.C. board.

2) Check the key input while referring to “2-6.

Input checking method”.

Panel P.C. board

Panel harness

4. If [E110] is displayed, there is a

malfunction of the needle up

signal.

1) Turn the upper shaft pulley to move the

needle bar to the needle up stop position.

2) Check that connector P5 (SYNC) is

connected to the power supply motor P.C.

board and that the synchronizer is

connected.

3) Check the zigzag sensor and needle up

signal input while referring to “2-6. Input

checking method”.

5. If [E403] is displayed, there is a

poor connection between the

main P.C. board and the PMD

P.C. board.

1) Check that connector P1 (MAIN) is inserted

into the PMD P.C. board.

2) Check if there is a harness short-circuit.

Main P.C. board

PMD P.C. board

6. If [E401] is displayed, there is a

poor connection between the

main P.C. board and the power

supply motor P.C. board.

1) Check that connector P17 (M-MOTOR) is

inserted into the main P.C. board, and that

connector P6 (MAIN) is inserted into the

power supply motor P.C. board.

2) Check if there is a harness short-circuit.

Harness

Power supply motor P.C.

board

Main P.C. board

7. If [E450] is displayed, the

machine head memory cannot

be verified.

1) Check that connector P3 (HEAD-M) is

inserted into the power supply motor P.C.

board.

2) Check if there is a harness short-circuit.

Machine head memory

8. If [E700] is displayed, there is

an abnormal rise in the power

supply voltage.

1) Check that the power supply voltage at the

wall outlet is within the range of the

specification voltage +/- 10%.

2) Refer to check items #1-2 and #1-3.

3) Check the power supply voltage while

referring to “2-6. Input checking method”.

9. If [E705] is displayed, there is

an abnormal drop in the power

supply voltage.

1) Check that the power supply voltage at the

wall outlet is within the range of the

specification voltage +/- 10%.

2) Refer to check items #1-2 and #1-3.

3) Check the power supply voltage while

referring to “2-6. Input checking method”.

10. If [E740] is displayed, there is a

malfunction of the cooling fan.

1) Check if there are any thread scraps blocking

the cooling fan.

2) Check that connector P8 (SENSOR1) is

inserted into the main P.C. board.

3) Check the fan signal input while referring to

“2-6. Input checking method”.

Fan motor assembly

8. ELECTRICAL MECHANISM

213 RH-9820

Problem #3 Feed base does not move at all when the start switch is depressed.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. Malfunction of treadle unit

With connector P6 (FOOT) inserted into the main

P.C. board, turn on the power and then measure

the voltages between pins 2-3 at the cord-side

connector. (No. 2 +, No. 3 −)

OK if the voltage is approximately 2 V at neutral

and approximately 4 V when the foot switch is

depressed as far as it will go.

Treadle unit

2. Malfunction of 2-pedal foot

switch

Malfunction of hand start switch

Disconnect connector P6 (FOOT) from the main

P.C. board, and check the continuity between

pins 5-6 and 7-8 at the cord-side connector.

OK if normally ∞ Ω, and 0 Ω when the foot switch

is depressed.

Foot switch

Foot switch cord assembly

Hand start switch

Problem #4 Feed base home position is shifted.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

Incorrect home position adjustment Switch to home position adjustment mode and

adjust the position of the feed base while

referring to “7-34. Adjusting the feed base X

home position and Y home position”.

Sewing machine specifications and

memory switch settings do not

match.

Check that the settings for memory switch No.

850 and No. 851 are correct while referring to

“ 2-3. Memory switch setting method (Advanced)”.

Malfunction of encoder Check the mechanisms for the X axis, Y axis and

θ axis home position sensors while referring to

“2-6. Input checking method”.

Pulse motor X assembly

Pulse motor Y assembly

Pulse motor θ assembly

5086Q

1201B

Work

clamp

Start

8. ELECTRICAL MECHANISM

214

RH-9820

Problem #5 When the start switch is depressed, an error code [E200] is displayed.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. If the X feed does not operate

and [E200] is displayed, there is

a blown fuse.

Remove fuse F2 from the power supply motor

P.C. board and check the continuity.

OK if continuity

(If there is no continuity, carry out the inspections

in 2.)

Fuse

6A-250V

2. If the X feed does not operate

and [E200] is displayed, there is

a malfunction of the PMD P.C.

board or of the power supply

motor P.C. board.

1) Disconnect connector P9 (POWER1) from

the PMD P.C. board and measure the

resistance between pins 1-2 at connector P9.

OK if ∞ Ω; if 0 Ω, there is a malfunction of the

PMD P.C. board.

2) Measure the resistance between the fuse F2

terminal that is close to P6 (MAIN) and pin 2

of connector P7 (PMD) on the power supply

motor P.C. board. (D10 check)

OK if ∞ Ω

3) Disconnect connector P9 (POWER1) from

the PMD P.C. board, and then measure the

voltage between pins 1-2 of the cord-side

connector.

OK if approx. +100 V

After measuring, turn off the power, wait 5

minutes or more and then insert P9.

4) Disconnect connector P2 (POWER2) from

the PMD P.C. board, and then measure the

voltage between pins 1-2 of the cord-side

connector.

OK if approx. +16 V

After measuring, turn off the power, wait 5

minutes or more and then insert P2.

5) Check that connector P1 (MAIN) is inserted

into the PMD P.C. board.

PMD P.C. board or power

supply motor P.C. board

3. If the feed mechanism does not

move and [E200] is displayed,

there is a malfunction of the

pulse motor or cord.

1) Disconnect connector P10 (XPM) from the

PMD P.C. board, and measure the resistance

between pins 1-2 and 3-4 at the cord-side

connector.

OK if 2−3 Ω

After measuring, insert P10.

2) If 1) is OK, there is a malfunction of the PMD

P.C. board.

Pulse motor assembly

PMD P.C. board

4. If the X feed moves slightly and

then [E200] is displayed, there

is a malfunction of the X axis

home position sensor (encoder).

1) Check that connector P20 (X-ENC) is

inserted into the main P.C. board.

2) Check the X axis home position sensor (encoder)

input while referring to “2-6. Input checking

method”.

Pulse motor X assembly

4884Q

4885Q

8. ELECTRICAL MECHANISM

215 RH-9820

Problem #6 When the start switch is depressed, an error code [E210] is displayed.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. If the feed mechanism does not

move and [E210] is displayed,

there is a malfunction of the

pulse motor or cord.

1) Disconnect connector P8 (YPM) from the

PMD P.C. board, and measure the resistance

between pins 1-2 and 3-4 at the cord-side

connector.

OK if 2-3 Ω

After measuring, insert P8.

2) If 1) is OK, there is a malfunction of the PMD

P.C. board.

Pulse motor Y assembly

PMD P.C. board

2. If the Y feed moves and then

[E210] is displayed, there is a

malfunction of the Y axis home

position sensor (proximity

sensor).

1) Check that connector P8 (SENSOR1) is

inserted into the main P.C. board.

2) Check the Y axis home position sensor input

while referring to “2-6. Input checking

method”.

3) If a metallic object is brought close to the Y

axis home position sensor and the LED

inside the sensor does not illuminate, there is

a malfunction of the sensor.

Y axis home position sensor

Problem #7 When the start switch is depressed, an error code [E220] is displayed.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. If the θ pulse motor does not

move and [E220] is displayed,

there is a malfunction of the

pulse motor or cord.

1) Disconnect connector P3 (PPM) from the

PMD P.C. board, and measure the resistance

between pins 1-2 and 3-4 at the cord-side

connector.

OK if 2-3 Ω

After measuring, insert P3.

2) If 1) is OK, there is a malfunction of the PMD

P.C. board.

Pulse motor P assembly

PMD P.C. board

2. If the θ pulse motor moves

slightly and then [E220] is

displayed, there is a malfunction

of the θ shaft home position

sensor (encoder).

1) Check that connector P5 (P-ENC) is inserted

into the main P.C. board.

2) Check the θ axis home position sensor

(encoder) input while referring to “2-6. Input

checking method”.

Pulse motor P assembly

4886Q

4888Q

8. ELECTRICAL MECHANISM

216

RH-9820

Problem #8 Work clamp is not lowered during sewing.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

Malfunction of valve or valve harness 1) Check that connector P12 (AIR1) is

inserted into the main P.C. board.

2) Check the air.

Valve harness

Problem #9 Hammer does not operate (When set to cutting before sewing).

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

Malfunction of valve or valve harness Check that connector P25 (AIR2) is inserted

into the main P.C. board.

Valve harness

Problem # 10 Sewing machine does not operate during sewing and [E120] is displayed.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. Malfunction of sewing machine

motor cord

Check connector P4 (UVW) of the power

supply motor P.C. board and the sewing

machine motor connector.

Motor cable

2. If the fuse (F1) on the power supply

motor P.C. board is blown, there is

a malfunction of the main P.C.

board.

1) If the fuse (F1) is blown, check the

resistance values between all pins of the

connector P4 (UVW) and the pins of the

fuse (∞ Ω) and replace the fuse.

2) If the fuse blows again, replace the power

supply motor P.C. board.

Power supply motor P.C.

board

3. Sewing machine motor overheats

and the thermostat inside the motor

operates when the sewing machine

is operated at short cycle.

1) Turn off the power and let the sewing

machine stand for 30 minutes or more.

2) Turn the power back on; OK if operation is

normal.

Avoid repeated sewing of sewing data that is

less than 15 stitches.

Motor cable

8. ELECTRICAL MECHANISM

217 RH-9820

Problem #11 An error code is displayed after the sewing machine operates.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. If [E120] (Needle drop signal

error), [E130] (Upper shaft signal

error) or [E131] (Upper shaft

signal error) is displayed after

the sewing machine operates,

there is a malfunction of the

synchronizer, interference is

causing operating problems, or

the sewing machine is

incorrectly adjusted.

1) Check that connector P5 (SYNC) is inserted

into the power supply motor P.C. board and

that the synchronizer is connected.

2) If the needle drop signal or upper shaft

encoder signal can be confirmed to be

turning on and off while referring to “2-6.

Input checking method”, then they are OK.

3) Turn the pulley by hand and check that it

turns smoothly.

4) Check that connector P17 (M_MOTOR) is

inserted into the main P.C. board and that

connector P6 (MAIN) is inserted into the

power supply motor P.C. board.

5) Check the harness between connector P17

(M_MOTOR) of the main P.C. board and

connector P6 (MAIN) of the power supply

motor P.C. board.

6) Check that the ground wire is connected to a

secure ground and that there is no equipment

nearby that is generating strong electrical

interference.

Motor assembly CCD-9820

2. If [E150] is displayed after the

sewing machine operates, the

motor is abnormally overheating.

1) Turn off the power and let the sewing

machine stand for 30 minutes or more.

2) Turn the power back on; OK if operation is

normal.

Problem #12 Upper thread trimming does not operate.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

Malfunction of valve or valve harness Check that connector P12 (AIR1) is inserted

into the main P.C. board.

Valve harness

Problem #13 Needle does not stop in the up position. ([E111] is displayed.)

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

1. Incorrect adjustment

Adjust while referring to “7-36. Adjusting the

upper shaft stop position”.

2. Malfunction of needle up signal Check the needle up signal input while referring

to “2-6. Input checking method”.

3. Malfunction of zigzag sensor 1) Check that connector P10 (SENSOR2) is

inserted into the main P.C. board.

2) Check the zigzag sensor while referring to

“2-6. Input checking method”.

Main P.C. board

4. Malfunction of cord Refer to inspection #10.

5. Malfunction of power supply

motor P.C. board

With connector P2 (POWER2) connected to the

PMD P.C. board, measure the voltage at the cord.

OK if approximately 30 V DC between pins 3-4.

Power supply motor P.C.

board

6. Malfunction of main P.C. board Main P.C. board

7. Malfunction of motor Motor

4892Q

8. ELECTRICAL MECHANISM

218

RH-9820

Problem #14 Lower thread trimming does not operate.

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

Malfunction of valve or valve harness Check that connector P12 (AIR1) is inserted

into the main P.C. board.

Valve harness

Problem #15 Hammer does not operate (when set to cutting after sewing).

Cause Inspection/Remedy/Adjustment Replacement if a malfunction

Malfunction of valve or valve harness Check that connector P25 (AIR2) is inserted

into the main P.C. board.

Valve harness

9. ERROR CODES

RH-9820

219

9. ERROR CODES

DANGER

Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet before

opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.

If a problem should occur with the sewing machine, the buzzer will sound and an error code and error message will appear in

the display.

Follow the remedy procedure to eliminate the cause of the problem.

Switch-related errors

Code Cause Remedy Page

E010 Stop switch was pressed during standby. Remove your finger from the stop switch (so that it is off). *1

E011 Stop switch was pressed during sewing.

Press the RESET key to clear the error.

* Press the key to move the feed mechanism so that

you can continue sewing.

E015

The stop switch was still being pressed, or

there is a problem with the stop switch

connection.

Turn off the power, and check the stop switch if it was not

being pressed at the time. -

E016 Problem with the stop switch connection. Turn off the power and check the connection of the stop

switch connector P13 at the main P.C. board. 200

E024 Start switch is being pressed. Release the start switch (so that it turns off). *1

E025

Start switch was depressed after the power

was turned on, or connection of start switch is

defective.

Turn off the power and check if the start switch is pressed.

If the start switch is not being pressed, check the switch

connector P6 at the main P.C. board.

200

E034 Work clamp switch is being pressed. Release the work clamp switch (so that it turns off). *1

E035 Work clamp switch was depressed, or

connection of work clamp switch is defective. Turn off the power and check the work clamp switch. *1

E050 Machine head tilting was detected after the

power was turned on.

Turn off the power, and then return the machine head to

its original position.

Check the connection of the machine head safety switch

connector P9 at the main P.C. board.

200

E051 Machine head tilting was detected while the

sewing machine was operating.

Turn off the power, and then return the machine head to

its original position.

Check the connection of the machine head safety switch

connector P9 at the main P.C. board.

200

E055 Machine head tilting was detected when the

power was turned on.

Turn off the power, and then return the machine head to

its original position.

Check the connection of the machine head safety switch

connector P9 at the main P.C. board.

200

E065 An operation panel key was still being pressed

when the power was turned on, or key is faulty.

Turn off the power and check that no keys are being

pressed. -

*1：Refer to the reference page in “10. ERROR CODES” in the instruction manual.

0320B

0461B

9. ERROR CODES

RH-9820 220

Upper shaft motor-related errors

Code Cause Remedy Page

E110 Needle up stop position error

Turn the upper shaft pulley until the point where the error

display disappears.

If the error display does not disappear, turn off the power

and check the connection of the synchronizer connector

P5 at the power supply motor P.C. board.

201

217

E111 Needle up stop position error Turn off the power, and check the connection of the

synchronizer connector P5 at the main P.C. board.

201

217

E120 Needle drop signal could not be detected. Turn off the power, and check the connection of the

synchronizer connector P5 at the main P.C. board.

201

216

217

E130 Sewing machine motor stopped due to a

problem, or synchronizer is faulty.

Turn off the power, and then turn the upper shaft pulley

and check if the sewing machine has locked up.

Check that the upper shaft motor connector P4 and

synchronizer connector P5 are connected at the power

supply motor P.C. board.

201

217

E131 Synchronizer is faulty.

Turn off the power, and check the connection of the

synchronizer connector P5 at the power supply motor P.C.

board.

201

217

E132 Problem detected with sewing machine motor

operation.

Turn off the power, and then turn the upper shaft pulley

and check if the sewing machine has locked up.

Check that the upper shaft motor connector P4 and

synchronizer connector P5 are connected at the power

supply motor P.C. board.

201

E133 Sewing machine motor stopping position is

incorrect.

Turn off the power, and then turn the upper shaft pulley

and check if the sewing machine has locked up.

Check that the upper shaft motor connector P4 and

synchronizer connector P5 are connected at the power

supply motor P.C. board.

201

E140 Sewing machine motor operated in reverse

during sewing.

Turn off the power, and then turn the upper shaft pulley

and check if the sewing machine has locked up.

Check that the upper shaft motor connector P4 and

synchronizer connector P5 are connected at the power

supply motor P.C. board.

201

E150 Sewing machine motor is overheating, or

temperature sensor is faulty.

Turn off the power, and then turn the upper shaft pulley

and check if the sewing machine has locked up.

Check that the upper shaft motor connector P4 and

synchronizer connector P5 are connected at the power

supply motor P.C. board.

201

9. ERROR CODES

RH-9820

221

Feed mechanism-related errors

Code Cause Remedy Page

E200

X-feed motor home position cannot be

detected.

Problem with X-feed motor or poor X home

position sensor connection.

Turn off the power, and then check that the X-feed motor

connector P10 is connected at the PMD P.C. board and

that the X pulse motor encoder connector P20 is

connected at the main P.C. board.

200

201

214

E201 X-feed motor stopped due to a problem. Turn off the power, and then check if there are any

problems in the X-feed direction. -

E210

Y-feed motor home position cannot be

detected.

Problem with Y-feed motor or poor Y home

position sensor connection.

Turn off the power, and then check that the Y-feed motor

connector P8 is connected at the PMD P.C. board and that

the Y pulse motor encoder connector P4 and sensor

connector P8 are connected at the main P.C. board.

200

201

215

E211 Y-feed motor stopped due to a problem. Turn off the power, and then check if there are any

problems in the Y-feed direction. -

E220

θ-feed motor home position cannot be

detected.

Problem with θ-feed motor or poor θ home

position sensor connection.

Turn off the power, and then check that the θ-feed motor

connector P3 is connected at the PMD P.C. board and that

the θ-feed motor encoder connector P5 is connected at

the main P.C. board.

200

201

215

E221 θ-feed motor stopped due to a problem. Turn off the power, and then check if there are any

problems in the θ-feed direction. -

9. ERROR CODES

RH-9820 222

Communication and memory-related errors

Code Cause Remedy Page

E401

Connection error detected between the main

P.C. board and power supply motor P.C.

board when the power was turned on.

Turn off the power, and then check that connector P17 on

the main P.C. board and connector P6 on the power

supply motor P.C. board are properly connected.

200

201

E403

Communication error detected between the

main P.C. board and PMD P.C. board when

the power was turned on.

Turn off the power, and then check that connector P16 on

the main P.C. board and connector P1 on the PMD P.C.

board are properly connected.

200

201

E410 Communication error between main P.C.

board and panel P.C. board detected.

Turn off the power, and then check that the operation

panel connector P1 is connected at the main P.C. board.

200

201

E411

Communication error between main P.C.

board and power supply motor P.C. board

detected.

Turn off the power, and then check that connector P17 on

the main P.C. board and connector P6 on the power

supply motor P.C. board are properly connected.

200

201

E420 No CF card is inserted.

(No messages are displayed.)

Turn off the power, and then insert a CF card into the CF

card slot of the control box. -

E422 Error occurred while reading CF card. Check the data on the CF card. -

E424 Insufficient free space on CF card. Use a different CF card. -

E425 Error occurred while writing to CF card. Use the specified type of CF card. -

E430 Problem with flash memory on main P.C.

board. Turn the power off and then back on again. -

E440 Problem with EEPROM on main P.C. board. Turn the power off and then back on again. -

E450 Model selection cannot be read from the

machine head memory.

Turn off the power, and check the connection of the

machine head memory connector P3 at the power supply

motor P.C. board.

212

E451 Data cannot be backed up to machine head

memory. Turn the power off and then back on again. -

E480 Problem with RAM on main P.C. board. Turn the power off and then back on again. -

[P.C. board and connector positions]

Power supply P.C. board PMD P.C. board Main P.C. board

0535B

9. ERROR CODES

RH-9820

223

Software-related errors

Code Cause Remedy Page

E569*2 Program version error between main and

motor detected.

Press the RESET key to clear the error.

* This error is displayed when a power supply motor

P.C.board for a different model is installed.

Replace with the power supply motor P.C.B. for the

RH-9820 as soon as possible.

198

E580 Error in EEPROM version detected. Turn off the power and carry out level 3 initialization. *3

E581 Error in memory switch version detected. Turn off the power and carry out level 2 initialization. *3

E582 Error in parameter data version detected. Turn off the power and carry out level 1 initialization. *3

*2：If the version of the main control program (MN) is 1.0.00, this error (E569) will not be displayed.

*3：Refer to “7-3. Resetting the data (initialization)” in the instruction manual.

Device-related errors

Code Cause Remedy Page

E600 Upper thread breakage occurred.

Thread the upper thread, and then press the RESET key

to clear the error.

* Press the key to move the feed mechanism so that

you can continue sewing.

E601 Upper thread breakage detector is not

connected.

Turn off the power and check the connection of the stop

switch connector P13 at the main P.C. board. 200

E630 Lower thread trimmer does not operate,

or lower thread trimming sensor is faulty.

Turn off the power, and then check that the valve harness

connector P12 and sensor connector P10 are inserted at

the main P.C. board.

200

E650 Hammer is lowered, or hammer position

sensor is faulty.

Turn off the power, and then check that the hammer valve

harness connector P25 and hammer position sensor

connector P3 are inserted at the main P.C. board.

200

E651 Hammer is not lowered, or hammer

position sensor is faulty.

Turn off the power, and then check that the hammer valve

harness connector P25 and hammer position sensor

connector P3 are inserted at the main P.C. board.

200

*4：Refer to the reference page in “10. ERROR CODES” in the instruction manual.

P.C. board-related errors

Code Cause Remedy Page

E700 Abnormal rise in power supply voltage. Turn off the power and check the input voltage. 212

E701 Abnormal rise in sewing machine motor

drive voltage. Turn off the power, and then check the voltage. -

E705 Abnormal drop in power supply voltage. Turn off the power and check the input voltage. 212

E710 Abnormal current detected in sewing

machine motor.

Turn off the power, and then check if there are any

problems with the sewing machine. -

E719 Problem detected with PMD P.C. board. Turn off the power, and then check the PMD P.C. board. -

E740 Cooling fan does not operate. Turn off the power, and then check that the cooling fan

sensor connector P8 is connected at the main P.C. board. -

9. ERROR CODES

RH-9820 224

Optional device-related errors

Code Cause Remedy Page

E940

Sub-hammer is not set even though

straight buttonhole program is being

sewn. (Straight buttonhole position

sensor is not responding.)

Turn off the power, and then check that connector P12

and connector P24 on the main P.C. board are properly

connected.

E941

Sub-hammer is not retracted even though

eyelet buttonhole program is being sewn.

(Eyelet buttonhole position sensor is not

responding.)

Turn off the power, and then check that connector P12

and connector P24 on the main P.C. board are properly

connected.

E942

Sewing machine is trying to sew an eyelet

buttonhole while there is no material

under the straight buttonhole sensor.

Sewing machine is trying to sew a straight

buttonhole while there is material under

the straight buttonhole sensor.

Press the RESET key. *5

E950

No response from feed plate home

position sensor while feed plate is being

driven.

Turn off the power, and then check that connector P23

and connector P25 on the main P.C. board are properly

connected.

E951 No response from feed plate left sensor

while feed plate is being driven.

Turn off the power, and then check that connector P23

and connector P25 on the main P.C. board are properly

connected.

E952 No response from feed plate right sensor

while feed plate is being driven.

Turn off the power, and then check that connector P23

and connector P25 on the main P.C. board are properly

connected.

*5：Refer to the instruction manuals for the corresponding devices.

If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem, contact the

place of purchase.

10. TROUBLESHOOTING

RH-9820

225

10. TROUBLESHOOTING

• If there is a problem with operation, first check that the threads are correctly threaded and that the needle is correctly

installed.

• Please check the following points before calling for repairs or service.

• If the following remedies do not fix the problem, turn off the power switch and consult a qualified technician or the place of

purchase.

CAUTION

Turn off the power switch and disconnect the power cord before carrying out troubleshooting.

Otherwise the machine may operate if the start switch is pressed by mistake, which could result in serious injury.

Problem Cause Remedy Page

Thread tension is too strong. Adjust the thread tension to the correct

tension.

Instruction

manual

Needle is not installed correctly. Install the needle so that it faces

correctly.

Instruction

manual

Thread is too thick for the needle. Select a thread which is suitable for the

needle.

Instruction

manual

Needle and looper adjustment is

incorrect.

Adjust the clearance between the

needle and looper, the needle bar height

or the looper and spreader height.

141, 148

149

Needle, looper, spreader, throat plate or

thread path is damaged. Repair or replace the respective part(s).

Thread breaks

Thread is not threaded correctly. Thread the thread correctly. Instruction

manual

Upper thread tension is too strong or too

weak.

Adjust the upper thread tension to the

correct tension.

Instruction

manual

Needle point is broken or bent. Replace with a new needle.

Clearance between needle and looper

tip is incorrect.

Adjust the clearance between the

needle and looper tip. 149

Needle, looper and spreader adjustment

is incorrect. Adjust correctly. 141

146 - 151

Needle and needle guard adjustment is

incorrect. Adjust the needle guard. 149

Eye looper tip is blunt. Repair with an oilstone or replace the

looper with a new one.

Needle is not installed correctly. Install the needle so that it faces

correctly.

Instruction

manual

Skipped stitches occur.

Needle is too thin. Select a needle that is suitable for the

sewing conditions.

Instruction

manual

10. TROUBLESHOOTING

RH-9820 226

Problem Cause Remedy Page

Needle is bent. Replace with a new needle.

Needle, looper and spreader adjustment

is incorrect. Adjust correctly. 141

146 – 151

Needle guard is covering the needle too

far. Adjust the needle guard. 149

Broken needle

Needle is too thin. Select a needle that is suitable for the

sewing conditions.

Instruction

manual

Upper movable knife is blunt. Replace the upper movable knife with a

new one. 166, 167

Upper movable knife does not move to

the full stroke because air pressure is

too weak.

Adjust the air pressure. Instruction

manual

Upper movable knife is not picking up

the upper thread.

Install the upper movable knife so that it

cuts only one side of the upper thread

loop.

167

Upper movable knife is not picking up

the upper thread because the last stitch

is being skipped.

Refer to the remedies given under

“Skipped stitches occur” in this

troubleshooting chart.

225

Upper thread is not cut.

Upper movable knife position is

incorrect.

Adjust the position of the upper movable

knife. 167

Movable knife is blunt. Replace the movable knife with a new

one. 169, 174

Movable knife does not move to the full

stroke because air pressure is too weak. Adjust the air pressure. Instruction

manual

Movable knife position is incorrect. Adjust the position of the movable knife

or the thread handler.

170, 173

175

Lower thread is not cut.

Cutting pressure for lower thread

trimming is too weak.

Adjust to an appropriate cutting

pressure. 170, 174

Lower thread is not being held.

Adjust the lower thread nipper (-01

specifications) or the lower thread

presser (-02 specifications).

171, 173

180

Upper thread length is too short after

trimming. Adjust the sub tension. Instruction

manual

Thread unravelling at

sewing start

Not enough upper thread is being fed

out.

Adjust the amount of upper thread being

fed out. 165

Cutting pressure is too weak. Adjust the cutting pressure so that it is

strong enough. 160

Knife and hammer are not contacting

properly. Grind the hammer surface. 154

Material is not being cut

cleanly.

Knife is blunt. Replace the knife with a new one. 157

Upper thread tension is too strong or too

weak.

Adjust the upper thread tension to the

correct tension.

Instruction

manual

Lower thread tension is too strong or too

weak.

Adjust the lower thread tension to the

correct tension.

Instruction

manual

Poor thread tightening

Tension or stroke of thread take-up

spring is incorrect.

Adjust the tension and stroke of the

thread take-up spring.

Instruction

manual

SERVICE MANUAL

RH-9820

I6100920B

2007. 03. B (1)

Printed in Ja

ACE&EASTMAN Rh 9820 Service Manual 9820SM_Cover1E User

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