Brother MD-602 User Manual

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Page 1

MD-600 Series

AC Servomotor for Industrial Sewing Machines

SERVICE MANUAL

MD-602 MD-612

(Single-Phase Power Specifications) (Three-Phase Power Specifications)

Page 2

SAFETY INSTRUCTIONS

SAFETY INDICATIONS AND THEIR MEANINGS................................................................... i

CAUTIONS WITH REGARD TO SAFETY ................................................................................ ii

WARNING LABEL .................................................................................................................... iii

Outline

1. Outline............................................................................................................................... 1

2. Operation panel and options .......................................................................................... 2

3. Model configuration ........................................................................................................ 3

4. Explanation of the name plate ........................................................................................ 4

Instruction

5. Installation ........................................................................................................................ 5

5.1 Installing the motor to the work table ................................................................... 5

5.2 Attatching the belt .................................................................................................. 5

5.3 Installing the belt cover .......................................................................................... 6

5.4 Connecting the connecting rod ............................................................................. 6

5.5 Adjusting the belt cover safety mechanisms ....................................................... 6

5.6 Connecting the cords.............................................................................................. 7

5.7 Installing the head lamp ......................................................................................... 9

5.8 Connecting the external operational panel .......................................................... 9

6. Adjusting the treadle unit ............................................................................................... 10

6.1 Operating the treadle.............................................................................................. 10

6.2 Adjusting the treadle .............................................................................................. 12

6.3 When using the automatic pressor foot lifter device........................................... 12

7. Using the control box ...................................................................................................... 13

7.1 Before turning on the power switch...................................................................... 13

7.2 Power switch and the power indicator ................................................................. 13

7.3 Setting the sewing speed ....................................................................................... 13

7.4 Control box DIP switch setting procedure ............................................................ 14

7.5 Description of functions ......................................................................................... 15

7.6 Periodic checks........................................................................................................ 17

8. Connecting options ......................................................................................................... 18

8.1 Connecting the pedal for standing operations ..................................................... 18

8.2 Connecting the material edge sensor ................................................................... 20

9. Using the operation panel F-40 ...................................................................................... 21

Maintenance work

10. Changing the head settings............................................................................................ 23

10.1 Setting the motor pulley size and DIP switches for the head ............................. 23

10.2 Setting the DIP switch maximum speed setting for the head............................. 23

10.3 Setting the control box head setting for the head ............................................... 24

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10.4 Setting the control box speed setting for the head ............................................. 25

11. Changing the function settings ...................................................................................... 26

11.1 Example for changing the memory switch setting .............................................. 26

11.2 Example for changing the parameter setting....................................................... 26

12. Adjustments ..................................................................................................................... 27

12.1 Synchronizer Model DB2-B737, B748, B774, B791 ............................................... 27

13. Troubleshooting guide .................................................................................................... 28

13.1 Error display and details ........................................................................................ 30

13.2 Control box troubleshooting guide ....................................................................... 31

13.3 Checking the machine solenoids ........................................................................... 33

13.4 Checking the motor ................................................................................................ 33

14. VR1 & VR2 setting of treadle unit .................................................................................. 34

Technical Material

15. Explanation of each mode .............................................................................................. 36

15.1 Initialization mode .................................................................................................. 36

15.2 Head setting mode.................................................................................................. 37

15.3 Memory switch setting mode and parameter setting mode, etc........................ 38

15.4 Stitching speed setting mode ................................................................................ 40

16. Operational instructions ................................................................................................. 41

16.1 When the power SW is ON .................................................................................... 41

16.2 When the power SW is OFF ................................................................................... 41

16.3 Operation of the pedal............................................................................................ 41

16.4 While running.......................................................................................................... 41

17. Memory switch list .......................................................................................................... 42

18. Parameter list ................................................................................................................... 47

19. Panel display table ........................................................................................................... 51

20. How to remove the control box ..................................................................................... 52

Control box block diagram ..................................................................................................... 53

Control PCB assembly diagram ............................................................................................. 54

Control PCB circuit diagram (1/3) (2/3) (3/3).......................................................................... 55

Power PCB assembly diagram (1-110/120) ........................................................................... 58

Power PCB circuit diagram (1-110/120) (1/2)......................................................................... 59

Power PCB assembly diagram (1-220/230-240) .................................................................... 60

Power PCB circuit diagram (1-220/230-240) (1/2).................................................................. 61

Power PCB assembly diagram (3-220) .................................................................................. 62

Power PCB circuit diagram (3-220) (1/2)................................................................................ 63

Power PCB assembly diagram (1-230(CE)) ........................................................................... 64

Power PCB circuit diagram (1-230(CE)) (1/2)......................................................................... 65

Power PCB circuit diagram (2/2) ............................................................................................ 66

Panel PCB assembly diagram ................................................................................................ 67

Panel PCB circuit diagram ...................................................................................................... 68

Treadle PCB assembly diagram, circuit diagram.................................................................. 69

Page 4

Thank you for purchasing this Brother general-purpose sewing machine motor. Before using the motor, please be sure to read the Safety Instructions and the explanations of how to use the motor which are contained in this manual.

Furthermore, because we are continually improving our products as a result of continuing research, the specifications for the product which you have purchased may differ slightly from those listed in this manual.

SAFETY INSTRUCTIONS

1. SAFETY INDICATIONS AND THEIR MEANINGS

This instruction 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

WARNING CAUTION

Failure to observe the instruction which appears after this indication while using the motor will result in death or severe injury to the user.

Failure to observe the instructions which appear after this indication while using the motor may result in slight to moderate injury to the user, or physical damage.

Symbols

The symbols which are used in this manual and their meanings are shown below.

This symbol is used to indicate the danger of electric shocks.

This symbol is used to indicate general cautions that should be observed.

This symbol is used to indicate that the ground connection must be made.

This symbol is used to indicate general actions which you must do.

MD-602, 612

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2. CAUTIONS WITH REGARD TO SAFETY

Following is a compilation of all the warnings and cautions which appear throughout this manual.

WARNING

Wait at least 5 minutes after turning off the power switch before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.

CAUTION

Do not use the motor near sources of strong electrical interference. If the motor is installed in a location which is close to sources of strong electrical interference such as high-frequency welders, it may cause problems with correct operation of the sewing machine.

Disconnect the power cord plug from the wall outlet before installing the motor.

The motor and control box weigh approximately 13 kg. Take care not to drop them on your feet when installing or removing them from the work table.

Be sure to tighten the nuts securely. If they are not tightened properly, it could cause the sewing machine to vibrate or shift its position while sewing.

Turn off the power switch and wait for the power indicator on the panel display to turn off before connecting and disconnecting any of the connectors.

Turn off the power switch before inserting or removing the AC power cord plug.

Be sure to connect the power supply to a secure ground. If the ground is not securely connected, electric shocks may result.

Use a lamp which is rated at 6 V AC and 20 W or less as the head lamp. If a lamp with a higher rating than this is used, it could cause the lamp wires and the transformer to overheat and burn out.

Confirm that the power supply matches the motor and the control box specifications before turning on the power switch. The motor, control box or sewing machine could be damaged if the supply voltage is too high.

Do not clamp the cords inside the control box when closing the control box cover.

Turn off the power switch before connecting the cords, otherwise damage to the control box, synchronizer, operation panel or material edge sensor may result.

Any fluctuations in the power supply voltage should be within ±10% of the rated voltage for the motor. Voltage fluctuations which are greater than this may cause problems with correct operation of the sewing machine.

Use a power supply with a capacity which is in excess of the motor power capacity. Insufficient power supply capacity may cause problems with correct operation of the sewing machine.

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 of the sewing machine.

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 of the sewing machine.

Avoid exposure to direct sunlight during use. Exposure to direct sunlight may cause problems with correct operation of the sewing machine.

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 of the sewing machine.

MD-602, 612

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3. WARNING LABEL

The warning label shown below is affixed to the cover of the control box. Please follow the instructions on the label at all times when using the motor. If the label has been removed or is difficult to read, please contact your nearest Brother dealer.

Hazardous voltage will cause injury.

Turn off main switch and wait 5 minutes before opening this cover.

Hochspannung verletzungsgefahr!

Bitte schalten sie den hauptschalter aus und warten sie 5 minuten, bevor sie diese abdeckung ffnen.

Un voltage non adapt provoque des blessures.

Eteindrel’interrupteur et attendre 5 minutes avantd’ ouvrir le capot

Un voltaje inadecuado puede provocar las heridas.

Apagar el interruptor principal y esperar 5 minutos antes de abrir esta cubierta.

Warning label

iii

MD-602, 612

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1. Outline

1.1 Features

• Thread trimming motor MD602/MD612 is a low-priced version of the MD601/611.

• Start tacking (2 to 9 stitches) and end tacking (2 to 9 stitches) are possible even without the operation panel (option).

• Voltage specifications for the single-phase 100V system, single-phase 200V system and 3-phase 200V system are avail-

able.

• The rated output is 400W.

• The motor torque has been greatly increased compared to the MD601/611.

1.2 Combination with Brother sewing machines

1. Single needle lockstitch machines (forward rotation)

B737, (B201) B791, B774, B722, B724, B748A, B798, B728, B772A, B778A, B781, B852, B853, B854, B883

2. Twin needle lockstitch machines (forward rotation)

B842, B872, B845, B875, B847, B848, B837, B877, B878

3. Overlock machine (reverse rotation)

(Note) The motor connections do not need to be changed to enable reverse rotation.

4. Post-type sewing machine (forward rotation)

P73, P81, C51

1.3 Options

• Operation panel F-20, F-40, F-100

• Material edge sensor II, material edge sensor IV, B sensor, bobbing thread detector

• Standing work pedal (variable speed pedal, 2-speed pedal)

1.4 Input/output

• Solenoid output: Four outputs (thread trimming, thread wiper, reverse run, presser foot lift) + one output for options

1.5 Miscellaneous

• Lamp terminal block and fuse mounted on control PCB.

• Only high-speeds are set with the head setting mode.

• Incompatible with magnetic synchronizer.

MD-602, 612

Page 8

2. Operation panel and options

Attachable operation panel F-20 (X-20)

Attachable options Standing work pedal

(Note 1) A built-in type panel for B737 and an external type (twin needle, etc.) F-panels are available. (Note 2) The X-panels can be used with the MD600 Series, but these panels do not have the stitching speed switch

(Note 3) The E-panel for the MD800 series cannot be used with the MD600 Series.

[

F-40 (X-40) F-100 (X-100)

Material edge sensor (Connect to S2 operation panel and use)

Assembly cord for standing work

Standing treadle 40 variable speed #6 J80081-040 Standing treadle two speed

Operation panel

Sewing machine Installation Type Code no. of model type operation panel

F-20 137-207-711-11

B737MK II built-in F-40 137-207-712-11

F-100 137-207-713-11 BF-20 137-207-811-11

B201 built-in BF-40 137-207-812-11

BF-100 137-207-813-11

Operation panel F-20 137-207-711-10 (without install attached F-40 137-207-712-10 plate) F-100 137-207-713-10

#8 J80380-040 J80630-001

Foot plug J02824-001

MD-602, 612

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3. Model configuration

● Japanese / English; Name Plate, Warning Label Instruction Manual

Panel type

BF panel F panel 0 BF-0 F-0 1 None None 2 BF-20 F-20 3 BF-40 F-40 4 BF-100 F-100

Panel Japanese/ Treadle

type English type

External

1 5 7 3 8

(HB)

Built-in

(BI)

Japanese

English

Japanese

English

1 3 7 6 0 2 7 3 3 5 5

● C; With one forward and one back step D; With two forward and two

back steps

rotation speed

0 1000 rpm 1 2000 rpm 3 3000 rpm 4 3500 rpm 5 4000 rpm 6 4500 rpm 7 5000 rpm 8 6000 rpm 9 8000 rpm A 2200 rpm B 2400 rpm C 2600 rpm D 6500rpm

Maximum

Single/3-phase

0 Single-phase 1 3-phase

Compatible head

Single needle Twin needle 0 B774 E B842 1 B748A F B872 2 B798/728 G B845/875 3 B722 H B847 4 B724 J B837 5 B201 K B877 6 B791 L B878 7 B737 M P73/P81 8 B852/853/854 N C51 9 B883 P B848

A Overlock B B772A C B778A D B781

For single-phase

Voltage Switch Destination 0 240V 1 110V Standard part General 2 110V With OCR USA 3 110V SJT Canada 4 230V None Europe 5 220V Standard part General 6 230V Standard part Greece 7 230V Standard part General 8 230V 9 100V

A 240V Standard part General B 110V SJT + OCR Canada C 220V With OCR General D 220V SJT + OCR Canada E 220V FOR B883 General

For 3-phase

Voltage Switch Destination 0 200V 1 220V Standard part 2 220V With OCR USA 3 220V With SJT Canada

B 220V With SJT & OCR Canada

SAA compatible part

SAA compatible part New Zealand

Domestic specifications

Australia

Japan

MD-602, 612

Page 10

4. Explanation of the name plate

Control box name plate

PHASE

****** OUT PUT 400W

MD-6*2*-

CONTROL BOX TYPE B NO.

qwert

yuio!0!1!2!3!4

Motor name plate

MD-60A

AC SERVO MOTOR

yuio!0!1!2!3!4

NO.

VOLTS HERTZ 50/60 FOR MD-60A

OUT PUT 400W R.P.M. 3500

SUPPLIED FROM CONTROL BOX MD-602/612

*********

MADE IN JAPAN

BROTHER INDUSTRIES, LTD.

MADE IN JAPAN

BROTHER INDUSTRIES, LTD.

phase voltage

display

single 110V SINGLE 110 single 220V SINGLE 220 230 240 single 230V SINGLE 220 230 240 single 230V CE SINGLE 230 single 240V SINGLE 220 230 240

three 220V THREE 220

production

date A January B February

9 Kariya

C March D April

modification No.

E May

F June

G July

!1!2!3!4

H August

J September

K October

L November

M December

Machine Head

(Single needle)

Model No.

0 B774 MD-6*2-1 1 B748A MD-6*2-1 2 B798/728 MD-6*2-1 3 B722 MD-6*2-1 4 B724 MD-6*2-1 5 B201 (B755) MD-6*2-1 6 B791 MD-6*2-1 7 B737 MD-6*2-1 8 B852/853/854 MD-6*2-1

9 B883 MD-6*2-5 A OVERLOCK MD-6*2R-1 B B772A MD-6*2-1 C B778A MD-6*2-1 D B781 MD-6*2-1

year (2 digits)

factory

serial No.

E B842 MD-6*2-1 F B872 MD-6*2-1

G B845/875 MD-6*2-1

E B847 MD-6*2-1 J B837 MD-6*2-1

K B877 MD-6*2-15

L B878 MD-6*2-15

M P73/P81 MD-6*2-9

N C51 MD-6*2-9

P B848 MD-6*2-1

C One forward and

D Two forward and

0 None A Australia ECE

Machine Head

(Twin needle)

Treadle type

one back step

two back step

3 4

standard

Model No.

Pulley size

105

maximum

speed (rpm)

0 1000 1 2000 2 2500 3 3000 4 3500 5 4000 6 4500 7 5000 8 6000

9 8000 A 2200 B 2400 C 2600 D 6500

phase 0 single 1 three

MD-602, 612

Page 11

5. Installation

Disconnect the power cord plug from the wall outlet before installing the motor.

The motor and control box weigh approximately 13 kg. Take care not to drop them on your feet when installing them to the work table.

Be sure to tighten the nuts securely. If they are not tightened properly, it could cause the sewing machine to vibrate or shift its position while sewing.

5.1 Installing the motor to the work table

CAUTION

3-φ8.5

w q

e r t

159

Un voltaje inadecuado

Hazardous voltage

Un voltage non adapté

Hochspannung

puede provocar las

will cause injury.

provoque des blessures.

verletzungsgefahr!

heridas.

Turn off main

Eteindrel'interrupteur et

Bitte schalten sie den

Apagar el interruptor

switch and wait 5

attendre 5 minutes

hauptschalter aus und

principal y esperar 5

minutes before

avantd' ouvrir le capot

warten sie 5 minuten,

minutos antes de abrir

opening this cover.

bevor sie diese

esta cubierta.

abdeckung öffnen.

1. Insert the bolts w into the holes in the work table q and then secure the motor u to the work table q by tightening the motor mounting brackets e to the work table q with the flat washers r, spring washers t and nuts y as shown in the illustration.

2. The positions of the work table q holes are shown in the illustration.

5.2 Attaching the belt

1. Tilt back the machine head and place the belt q onto the motor pulley w and the machine pulley e.

Tilt back

10 – 14 mm of deflection

2. Turn the two nuts r to adjust the deflection in the Vbelt q when the center of the belt is pushed. The recommended values are:

1. For single-needle sewing machines and overlock

machines, the deflection should be 10 – 14 mm when the belt is pushed with a force of 5 N (500 g).

2. For twin needle sewing machines, the deflection

should be 10 – 20 mm when the belt is pushed with a force of 10 N (1 kg).

Note:

While using the sewing machine, the belt will conform to the pulley and cause the belt tension to loosen. If the belt tension is too loose, the following problems can occur.

1. The stopping position may shift.

2. An abnormal noise may be heard due to belt slip-

page.

3. The belt may become too loose and contact the

cover.

4. When sewing heavy materials, the belt may slip on

the pulley and the sewing machine may stop.

MD-602, 612

Page 12

5.3 Installing the belt cover

5.4 Connecting the connecting rod

1. Secure the belt cover q to the motor e with the two screws w as shown in the illustration. At this time, position the belt cover q so that it does not touch the belt.

2. A belt casting prevention guide and finger guide are provided on the belt cover. Refer to “5.5 Adjusting the

belt cover safety mechanisms” on this page.

• Pass the connecting rod joint q through hole A in the treadle lever w, and tighten it with the spring washer e and nut r.

• Adjust the position of the machine treadle plate so that the connecting rod is perpendicular to the treadle plate.

Note:

The treadle pressure is adjusted to the position of hole A at the time of shipment from the factory. Refer to “6.

Adjusting the treadle unit”.

5.5 Adjusting the belt cover safety mechanisms

Forward rotation

Mark for 105 mmdiameter pulley

Mark for 90 mmdiameter pulley

Mark for 80 mmdiameter pulley

Mark for 90 mmdiameter pulley

Mark for 80 mmdiameter pulley

Mark for 105 mmdiameter pulley

Reverse rotation (Overlock machines)

e r

5.5.1 Adjusting the belt casting prevention guide

1. Loosen the screw q.

2. A mark showing the pulley size is stamped on the belt cover. (The available inner diameters are 90 mm, 105

mm and 80 mm.) Adjust the position of the belt casting prevention cover

w in accordance with the pulley size. Align the projection position with the mark. (For 80 mm diameter pul-

leys, install the belt casting prevention cover w in the reverse direction.)

3. After adjusting, tighten the screw q.

Note:

This safety guide will prevent the belt from coming off even when the machine head is tilted back.

5.5.2 Adjusting the finger guard

1. Loosen the screw e.

2. Install the finger guard so that it is on the belt winding side.

3. A mark showing the pulley size is stamped on the belt cover. (The available inner diameters are 80 mm, 90 mm and 105 mm.) Adjust the position of the finger guard r in accordance with the pulley size. Align the center of the screw with the mark.

4. After adjusting, tighten the screw e.

Note:

The finger guard is a safety mechanism that prevents fingers from being caught in the belt. Change the position of the finger guard r to match the direction of rotation of the motor pulley.

MD-602, 612

Page 13

5.6 Connecting the cords

CAUTION

Turn off the power switch and wait for the power indicator on the panel display to turn off before connecting and disconnecting any of the connectors.

Turn off the power switch before inserting or removing the AC power cord plug.

Be sure to connect the power supply to a secure ground. If the ground is not securely connected, electric shocks may result.

5.6.1 Connecting the power cord, power switch and ground cord

Ground symbol

Mounting bracket grounding screw

Power switch

Power cord

Sewing machine oil pan

Ground cord

5.6.2 Connecting the sewing machine and control box

Hochspannung verletzungsgefahr! Bitte schalten sie den hauptschalter aus und warten sie 5 minuten, bevor sie diese abdeckung öffnen.

Un voltage non adapté provoque des blessures. Eteindrel'interrupteur et attendre 5 minutes avantd' ouvrir le capot

Un voltaje inadecuado puede provocar las heridas. Apagar el interruptor principal y esperar 5 minutos antes de abrir esta cubierta.

Hazardous voltage will cause injury. Turn off main switch and wait 5 minutes before opening this cover.

Hochspannung verletzungsgefahr! Bitte schalten sie den hauptschalter aus und warten sie 5 minuten, bevor sie diese abdeckung öffnen.

Un voltage non adapté provoque des blessures. Eteindrel'interrupteur et attendre 5 minutes avantd' ouvrir le capot

Un voltaje inadecuado puede provocar las heridas. Apagar el interruptor principal y esperar 5 minutos antes de abrir esta cubierta.

12-pin plug

Ground

Green/yellow

6-pin plug

• Loosen the two screws q, and then gently pull the cover w toward you to open it.

• Connect the 12-pin plug and the 6-pin plug.

• Close the cover w (be careful not to clamp the cord)

and tighten the two screws q.

• Connect the synchronizer cord e.

MD-602, 612

Synchronizer cord

Page 14

For machine solenoid

For presser foot lifter

12-pin plug

6-pin plug

•12-pin plug terminal 12-pin plug No.

Thread trimming solenoid r·t

Thread wiping solenoid u·i

Quick reverse solenoid !0·!1

Quick reverse switch o·!2

Option output q·w

Ground e

Spare y

•6-pin plug terminal 6-pin plug No.

Presser lifter solenoid q·r

40 V power supply e

Knee switch w·t

For standing pedal (option) For synchronizer

9-pin plug

•9-pin plug terminal 9-pin plug No.

High-speed switch w

Low-speed switch y

Thread trimming switch e

Presser foot lift switch u

+8 V q VSP i

0 V r

Ground o

Spare t

Ground y

•8-pin plug terminal 8-pin plug No.

Ground q

+5 V w

Needle down signal e

0 V r

NONP t

Needle up signal y

Encoder u

Ground i

Note:

The puller output is output from the option output during machine operation with the settings made at shipment from the factory. Note the following points when connecting to the option output terminals.

a. Connect a solenoid or air valve with a resistance of 10 Ω or greater.

b. The voltage between the terminals should be equivalent to 40 V DC. When con-

necting an air valve, connect a resistor in series so that the rated voltage is ob-

Approx. 40 V

Resistor

Air valve

tained.

c. Never short circuit the output terminals.

Note:

If using an automatic presser foot lifter, set the DIP switch SW1-3 on the circuit board to ON. (Refer to “7.5.2 Other DIP switch functions”.)

MD-602, 612

Page 15

5.7 Installing the head lamp

Use a lamp which is rated at 6 V AC and 20 W or less as the head lamp. If a lamp with a higher rating than this is used, it could cause the lamp wires and the transformer to overheat and burn out.

CAUTION

CPU

Lamp

Lamp cords

5.8 Connecting the external operation panel

For external operation panel

For lamp cords

For option

1. Open the control box cover q.

2. Loosen the screws e of the terminal block w, insert the lamp cords t into the clamps r as far as they will go, and then tighten the screws e.

Note:

Do not tighten the screws e too tightly, as this may damage the terminal block w.

3. Pass the lamp cords t through the rubber plug y. Refer to the illustration of the rubber plug y in “5.8 Connecting the external operation panel” at below-left on this page at this time.

4. Close the control box cover q.

1. The F-20, F-40 and F-100 operation panels can be used.

2. Disconnect the synchronizer cord q.

3. Loosen the screw w, and then gently pull the cover e toward you to open it.

4. After opening the pawl of the circuit board connector

r, align the ▼ mark on the operation panel connector t with the ▼ mark on the circuit board connector r,

and securely insert operation panel connector t until the pawl locks.

5. Fit the rubber plug y onto the operation panel cord u as shown in the illustration, and then install the con-

trol box while being careful not to damage the cord u. (Break the membrane of the rubber plug y.)

6. Close the cover e and secure it with the screw w. Be careful not to clamp any of the cords with the cover.

7. Connect the synchronizer cord q.

Note:

When an external operation panel is installed, the backtacking function of the control circuit board will be disabled, so use the external operation panel to carry out backtacking.

MD-602, 612

Page 16

6. Adjusting the treadle unit

6.1 Operating the treadle

• There are two types of treadles, one with one forward and one rear stage and one with two forward and two rear stages. These are provided according to the destination of the machine.

6.1.1 For treadles with one forward and one rear stage

CAUTION

Take your foot off the treadle before turning on the power switch.

Neutral

Low speed

High speed

1. The treadle is at the neutral position q when the treadle is not pressed.

2. When the treadle is gently depressed to position w, low-speed sewing is carried out. If it is then depressed as far as e, high-speed sewing is carried out.

3. When the treadle is pressed forward and then back to the neutral position q, the needle will stop below the needle plate (when needle down stop mode has been set).

4. When the treadle is depressed backwards to position r (or when the treadle is pressed backward to position r and is then returned to neutral position q), the thread trimmer operates, and then the needle will be raised and stop above the needle plate.

5. If using with the synchronizer cord disconnected

• When the treadle is pressed forward and then back to the neutral position q, the machine will stop regardless of the needle position.

• Thread trimming will not be carried out even if the treadle is pressed backed to position r. (The sewing machine does not operate.)

6. If an automatic presser foot lifter is being used

• The presser foot will rise when the treadle is pressed backwards. If the knee switch is pressed, the pressure foot will not raise with the treadle operation, so raise and lower the presser foot with the knee switch.

• When the treadle is pressed backwards and the thread is trimmed, the sewing machine will stop, and the presser foot will rise. To lower the presser foot, press the treadle backwards and then return it to the neutral position q. The

presser foot can also be lowered using the knee switch. If the treadle is pressed forward, the sewing machine will operate after the presser foot lowers.

Note:

The presser foot can be raised and lowered by returning the treadle only from when the power switch is turned on to when the knee switch is operated.

Thread trimming

MD-602, 612

Page 17

6.1.2 For treadles with two forward and two rear stages

CAUTION

Take your foot off the treadle before turning on the power switch.

Neutral

Presser foot lowered

Low speed

High speed

1. The treadle is at the neutral position q when the treadle is not pressed.

2. When the treadle is gently depressed to position w, low-speed sewing is carried out. If it is then depressed as far as e, high-speed sewing is carried out.

3. When the treadle is pressed forward and then back to the neutral position q, the needle will stop below the needle plate (when needle down stop mode has been set).

5. If using with the synchronizer cord disconnected

• When the needle is pressed forward and then back to the neutral position q, the machine will stop regardless of the needle position.

• Thread trimming will not be carried out even if the treadle is pressed backed to position r. (The sewing machine does not operate.)

6. If an automatic presser foot lifter is being used

• The presser foot will rise when the treadle is gently pressed back to the backward position t.

• The presser foot will lower when the treadle is returned to the neutral position q.

• The presser foot will lower if the treadle is gently pressed to the position y while the presser foot is raised.

Presser foot raised

Thread trimming

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6.2 Adjusting the treadle

Turn off the power switch before starting work, otherwise the motor may operate, which could result in injury.

CAUTION

Fig A Fig B

6.2.1 Adjusting the treadle pressure

• If the machine starts running at a low speed when your foot is simply resting on the treadle, or if the treadle

pressure is too weak, adjust the position (a to c) at which the treadle spring q is hooked onto the treadle lever w.

Note:

The treadle pressure will increase from position a to position c.

abc

6.2.3 Adjusting the treadle stroke

• Remove the nut t, and then move the connecting rod joint y from the position in figure A to the position in figure B. The treadle stroke will increase by approx. 1.25 times.

Note:

This adjustment will also affect the treadle pressure and the treadle return pressure, so these settings should be readjusted if necessary.

q w

Treadle unit

6.2.2 Adjusting the treadle return pressure

• Loosen the nut e and turn the bolt r. The treadle re- turn pressure becomes heavier as the bolt r is tightened, and becomes lighter as the bolt r is loosened.

6.3 When using the automatic presser foot lifter device

1. When the treadle is depressed to position r, the presser foot is raised.

2. If you would like the treadle pressure to be lighter when it is depressed forward from the 2nd step to the 1st step, change the position of the spring from F to E. If you would like the pedal return to be from the 2nd step to the 1st step at this time, change the spring position from C to D.

• When changing the spring positions from F to E and from C to D, you must remove the three screws q of the treadle unit and disconnect the treadle unit from the control box before changing the spring positions.

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7. Using the control box

7.1 Before turning on the power switch

Control box rating plate (Example: Single-phase 220 V specifications)

Power supply phase

Power supply voltage

MD-602-1

CONTROL BOX

TYPE

BC4670

NO.

B019A1101

Model

SINGLE PHASE OUTPUT 400 W VOLTS HERTZ 50/60

FOR

MADE IN JAPAN BROTHER INDUSTRIES, LTD.

220 230 240

MD-60A

CAUTION

• Check the power supply and the control box specifications.

1. Model q MD-602 (for single-phase power supply) MD-612 (for three-phase power supply) The model should match the power supply phase w.

2. The power supply voltage e indicated is an AC volt-

age.

3. The power supply frequency can be either 50 Hz or 60

Hz.

1. Are all connectors connected correctly?

• Synchronizer connector

• Sewing machine connector

• Ground cord

2. Is the sewing machine cord touching the V-belt? Is the belt tension correct?

3. Does the sewing machine operate when turned gently by hand?

Refer to “5.6 Connecting the cords”.

Refer to “5.1 Installing the motor to the work table” and “5.2 Attaching the belt”.

7.2 Power switch and power indicator

• When the power ON switch q is pressed, the power indicator (green) e lights and the power turns on.

• When the power OFF switch w is pressed, the power indicator (green) e turns off and the power switches off.

7.3 Setting the sewing speed

• Turn the speed adjustment knob r on the front of the control box clockwise to increase the sewing machine

speed (the speed corresponding to the treadle depression amount), and turn it counterclockwise to reduce the speed.

• The maximum sewing speed that can be set is the sewing speed which is determined by DIP switch settings.

Refer to “7.5.2.1 DIP switch 1 functions”. The minimum sewing speed is the sewing speed when the treadle is at the low-speed sewing position.

Speed adjustment knob

Power indicator

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7.4 Control box DIP switch setting procedure

WARNING

Wait at least 5 minutes after turning off the power switch before opening the cover of the control box. Touching areas where high voltages are present can result in severe injury.

CAUTION

Do not clamp the cords inside the control box when closing the control box cover.

• Make sure that the DIP switches are set correctly, otherwise incorrect operation may result.

• Disconnect the synchronizer cord q.

• Loosen the two screws w, and then gently pull the

cover e toward you to open it.

• Set the DIP switches. Refer to the tables for details of DIP switch functions.

• Close the cover e (be careful not to clamp the cord) and tighten the two screws w.

• Connect the synchronizer cord q.

Hazardous voltage will cause injury. Turn off main switch and wait 5 minutes before opening this cover.

Hochspannung verletzungsgefahr! Bitte schalten sie den hauptschalter aus und warten sie 5 minuten, bevor sie diese abdeckung öffnen.

Un voltage non adapté provoque des blessures. Eteindrel'interrupteur et attendre 5 minutes avantd' ouvrir le capot

Un voltaje inadecuado puede provocar las heridas. Apagar el interruptor principal y esperar 5 minutos antes de abrir esta cubierta.

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7.5 Description of functions

• The control panel is provided with the following functions.

· · · Can be used

· · · Cannot be used

Function No panel F-20 F-40 F-100 Maximum sewing speed setting Start backtacking speed setting Needle stop position Automatic thread trimming (thread trimming after Fixed stitch sewing) Slow start Correction sewing Highest needle position stop Start backtacking using control box (N) (2 – 9 stitches) End backtacking using control box (N) (2 – 9 stitches) Start backtacking using panel (N) (0 – 9 stitches) End backtacking using panel (N) (0 – 9 stitches) Start backtacking (V) End backtacking (V) Continuous backtacking Fixed stitch sewing Name label sewing Pleat presser sewing Automatic sewing Continuous sewing (100 stitches or more) Reverse device operation using panel Presser foot lifting operation when stopped using panel Program entry

For details, refer to the instruction manual for the respective operation panel.

7.5.1 Backtacking function using the control box when no operation panel is installed

7.5.1.1 Start backtacking function

When the start backtack key q is pressed, the start backtack LED e lights and start backtacking can be carried out. When the start backtack key q is pressed once more, the

Start backtack LED

Start backtack key

start backtack LED e switches off and start backtacking can no longer be carried out.

The start backtack key q can only be used to turn start backtacking on and off after thread trimming is complete.

7.5.1.2 End backtacking function

When the end backtack key w is pressed, the end backtack LED r lights and end backtacking can be carried out. When the end backtack key w is pressed once more, the end backtack LED r switches off and end backtacking can no longer be carried out.

The end backtack key w can be used to turn end backtacking on and off at any time.

End backtack LED

End backtack key

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7.5.1.3 Setting the number of backtack stitches

Control circuit board DIP switches

Display A B C D

DIPSW No. SW3 SW2

No. of stitches 1 23456123456

2 OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF OFF 3 ON OFF OFF ON OFF OFF ON OFF OFF ON OFF OFF 4 OFF ON OFF OFF ON OFF OFF ON OFF OFF ON OFF 5 ON ON OFF ON ON OFF ON ON OFF ON ON OFF 6 OFF OFF ON OFF OFF ON OFF OFF ON OFF OFF ON 7 ON OFF ON ON OFF ON ON OFF ON ON OFF ON 8 OFF ON ON OFF ON ON OFF ON ON OFF ON ON 9 ONONONONONONONONONONONON

• Setting the number of start backtack stitches Use switches t of DIP switch 3 to set the number of start backtacking stitches A. Use switches y of DIP switch 3 to set the number of start backtacking stitches B.

• Setting the number of end backtack stitches Use switches u of DIP switch 2 to set the number of end backtacking stitches C. Use switches i of DIP switch 2 to set the number of end backtacking stitches D.

Note:

At the time of shipment from the factory, DIP switches A, B, C and D are all set to OFF. As a result, the number of stitches is set to 2 for each of A, B, C and D. When using an operation panel, backtacking functions using the control box are all disabled.

yui

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7.5.2 Other DIP switch functions

7.5.2.1 DIP switch 1 o functions

SW1-1

SW1-2

SW1-3

SW1-4

SW1-5

SW1-6

SW1-7

SW1-8

Presser foot is lowered when treadle is returned to neutral position immediately after thread trimming. (Export specifications)

OFF

Presser foot is raised when treadle is returned to neutral position immediately after thread trimming. (Domestic Japan specifications)

ON Motor pulley diameter 90 mm

OFF Motor pulley diameter 105 mm

ON Automatic presser foot lifter device used

OFF Automatic presser foot lifter device not used

ON Stopping position when treadle is at neutral is needle up stop position.

OFF Stopping position when treadle is at neutral is needle down stop position.

ON Twin needle

OFF Single needle

ON Limit speed setting 1

OFF

ON Limit speed setting 2

OFF

ON Limit speed setting 3

OFF

Setting for limit speed (sewing machine’s maximum sewing speed) ( ) is for overlock machines

Speed (rpm)

DIP switch

1,000 2,000 2,500 3,000 3,500 4,000 4,500 4,700

(5,000) (5,500) (6,000) (6,500) (7,000) (7,500) (8,000) (8,500)

SW1-6 OFF ON OFF ON OFF ON OFF ON SW1-7 OFF OFF ON ON OFF OFF ON ON

SW1-8 OFF OFF OFF OFF ON ON ON ON

Pulley diameter

105 mm for single-needle machines and overlock machines (90 mm for twin-needle machines)

Note:

When an operation panel has been connected, the operation panel setting has priority, regardless of the setting for DIP switch 1-4. Only the maximum sewing speed can be changed using the DIP switch 1-5 setting.

Refer to “7.5.2.2 DIP switch 6 !0 functions” on this page for other speed selection settings.

7.5.2.2 DIP switch 6 !0 functions

DIP switch Setting speed

SW6-1

SW6-2

Low speed (inching speed)

Thread trimming speed

SW6-3 Backtacking speed

SW6-4

Improved stopping speed

ON 250 rpm

OFF 215 rpm

ON 185 rpm

OFF 215 rpm

ON 1,000 rpm

OFF 1,800 rpm

ON 1,500 rpm

OFF 1,700 rpm

Single-needle machine and overlock machines setting

High

SW1

-1 -2 -3 -4

SW6

Twin-needle machine setting

High

SW1

Note:

DIP switches 1 – 2, 1 – 5 and 6 (1 – 4) are set to match the optimum

-1 -2 -3 -4

sewing speed for the machine head, and so should not be changed. If using the motor after changing over the machine head, check that

SW6

the above settings match the specifications of the machine head.

7.6 Periodic checks

• Clean the dust out of the dust cover at periodic intervals. If the dust cover becomes blocked, there is the danger that the motor may overheat.

• If not using the motor for long periods, turn off the power and disconnect the motor from the power supply.

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8. Connecting options

The options include the operation panel, pedal for standing operation and the material edge sensor. Refer to “5.8 Connecting the external operation panel” for the operation panel connection methods. Refer to each respective instruction manual for details on the options.

8.1 Connecting the pedal for standing operations

• A variable-speed pedal (J80081-040 or J80380-040) or a two speed pedal (J80630-001) can be connected.

1. Disconnect the synchronizer cord e.

2. Loosen the two screws q (do not remove it), and then gently pull the cover w toward you to open it.

Foot plug cap

Hochspannung verletzungsgefahr! Bitte schalten sie den hauptschalter aus und warten sie 5 minuten, bevor sie diese abdeckung öffnen.

Un voltage non adapté provoque des blessures. Eteindrel'interrupteur et attendre 5 minutes avantd' ouvrir le capot

Un voltaje inadecuado puede provocar las heridas. Apagar el interruptor principal y esperar 5 minutos antes de abrir esta cubierta.

Hazardous voltage will cause injury. Turn off main switch and wait 5 minutes before opening this cover.

Foot plug assembly NDD

3. Loosen the screw r (do not remove it), and then turn the connector presser plate t approximately 90°

around the axis of the screw r in the direction of the arrow A in the illustration.

4. Pull the foot plug cap i toward you to remove it.

5. Insert the 9-pin connector o of the foot plug assembly NDD (J02824-001) u into the connector mounting base

!2 from the front, so that the grounding cord terminal !1 is on the right side.

6. Insert the foot plug assembly u as shown in the illustration, and then securely insert the 7-pin connector !0 of the circuit board into the 7-pin connector !4 of the control circuit board.

7. Remove the grounding screw y, and then secure the grounding cord terminal !1 together with the other grounding cord terminals !3 and !6 by re-tightening the grounding screw y.

!6 !1

t !7

8. Return the connector presser plate t to its original position, fit it into the notch !7 to prevent it from turning, and then securely tighten the screw r.

9. Securely insert the 9-pin connector !5 for the standing pedal into the 9-pin connector o.

10. Close the cover w (be careful not to clamp the cord) and tighten the two screws q.

11. Connect the synchronizer cord e.

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Page 25

• Connector wiring diagram

VARIABLE-SPEED PEDAL TWO SPEED PEDAL

HIGH. S

+8V

TRIMMER

INPUT

LIFT

When the switch for the target function has been turned ON, turn the other OFF.

HIGH. S

LIFT

+8V

TRIMMER

LOW. S

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8.2 Connecting the material edge sensor

CAUTION

Turn off the power switch before connecting the cords, otherwise damage to the control box, synchronizer, operation panel or material edge sensor may result.

• The sensor II is used for this product.

• Sensor II is used in conjunction with the F-20, F-40 or F-100 operation panel, and cannot be used by itself.

• The sensor II connection method differs according to the operation panel type.

• Built-in type • External type

1. Remove the operation panel q from the machine.

2. Insert the sensor II connector e into connector w in the operation panel.

3. Using a mounting bracket r, screw the sensor II t onto the machine.

4. Install the operation panel q onto the machine.

1. Remove the operation panel q from the mounting bracket w.

2. Bend the protrusion e on the right side of the operation panel.

3. Insert the sensor II connector t into connector r in the operation panel.

4. Install the sensor II y and operation panel q onto the mounting bracket w as shown in the illustration.

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9. Using the operation panel F-40

★ Key operations and the number of stitches set cannot be changed during sewing. Be sure to confirm all key settings

and the number of stitches before starting to sew. Note that the end backtacking feature can be set and canceled while sewing.

★ For keys which have an indicator to their left, the indicator will illuminate when the key is pressed once, and will

switch off when the key is pressed once more. This operation is repeated each time the key is pressed.

★ To carry out two or more operations simultaneously, press all of the necessary keys so that the respective indicators

are illuminated.

Part names and functions

!2 !3 qyuo!4e!1r

No.

LED display

Stitch number

setting keys

Start backtack key

End backtack key

Key name

t!7 wi!0 !6 !5

Function

Displays the number of start and end backtack stitches (A, B, C and D), the number of fixedlength stitches (E), the number of label sewing stitches (E and F), the number of pleat presser stitches (E), the sewing speed (A, B, C and D) and the backtack sewing speed (A, B, C and D).

These keys are used to set the number of start and end backtack stitches (A, B, C and D), the number of fixed-length stitches (E), the number of label sewing stitches (E and F), the number of pleat presser stitches (E), the sewing speed (A, B, C and D) and the backtack sewing speed (A, B, C and D). Press to increase a setting from 0 up to 9. Press to decrease a setting from 9 down to

0. When this key is pressed, the number of start backtack stitches set for A and B (0 – 9) is

sewn.

When this key is pressed, the number of end backtack stitches set for C and D (0 – 9) is sewn.

Continuous backtack key

When this key is pressed, the number of stitches set for A, B, C and D (0 – 9) will be sewn as continuous backtack stitches. After the machine finishes sewing one A-B-C-D cycle, the thread is automatically trimmed. The number of start and end backtack stitches can be set independently of each other.

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Page 28

No.

Key name

Function

Fixed stitch key

Name label key

Pleat presser

sewing key

AUTO key

Thread trimming

!00

key

When this key is pressed, the number of stitches for seam E (01 – 99) is sewn. To sew start backtack stitches at this time, press the start backtack key e. The number of start backtack stitches are set by A and B. To sew end backtack stitches at this time, press the end backtack key r. The values for C and D become the number of end backtack stitches when fixed stitch sewing is off.

When this key is pressed, the number of stitches for seams E and F (01 – 99) will each be sewn twice. To sew start backtack stitches at this time, press the start backtack key e. The values for A and B become the number of start backtack stitches when name label sewing is off. To sew end backtack stitches at this time, press the end backtack key r. The values for C and D become the number of end backtack stitches when name label sewing is off.

When this key is pressed, the number of stitches for seam E (01 – 99) is sewn when the actuator is pressed. To sew start backtack stitches at this time, press the start backtack key e. The number of start backtack stitches are set by A and B. To sew end backtack stitches at this time, press the end backtack key r. The values for C and D become the number of end backtack stitches when pleat presser sewing is off.

When this key is pressed, machine operations (start backtack sewing, end backtack sewing, fixed stitch sewing and thread trimming) will be automatically carried out up until the set position when the treadle is depressed. This key is only valid when the continuous backtack key t, fixed stitch key y or name label key u has been pressed.

When this key is pressed, the thread is trimmed after sewing is completed. This key is only valid when the fixed stitch key y or name label key u has been pressed.

Sewing speed key

Sewing speed

indicator

Backtack indicator

Slow start key

Correction key

Needle up/down

key

Half stitch key

When this key is pressed, the sewing speed indicator !2 will illuminate and the sewing speed will be shown in the LED display q. You can then set the sewing speed by setting the respective values for A, B, C and D. If this key is then pressed again, the backtack indicator !3 will illuminate and the backtack sewing speed will be shown in the LED display q. You can then set the sewing speed by setting the respective values for A, B, C and D. If this key is then pressed again or if the machine is started, the LED display q, sewing speed indicator !2 and backtack indicator !3 will all switch off.

When this key is pressed, the first two stitches at the sewing start (after the thread has been trimmed and the needle has been raised) are sewn at low speed.

When set to ON, correction sewing is carried out at low speed when the quick reverse switch is pressed. This function cannot be used after thread trimming. If the quick reverse switch is pressed while the sewing machine is operating, reverse feed will be carried out.

The “ ” and “ ” indicators illuminate each time this key is pressed. If the treadle is pressed to the neutral position while the “ ” indicator is illuminated, the needle will rise above the needle plate and stop (needle up stop). If the treadle is pressed to the neutral position while the “ ” indicator is illuminated, the needle will drop below the needle plate and stop (needle down stop).

This key is used to raise or lower the needle when machine operation is interrupted.

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10. Changing the head settings

When using a motor for a different head than the default head, change the settings with the following procedures. (Note) The operation panel F-40 or F-100 is required.

10.1 Setting the motor pulley size and DIP switches for the head

Head Pulley size SW1, SW6 settings

• Single needle lockstitch machine B737, (B201) B791, B774, B722, B724, B748A, B798, B728, B772A, B778A, B781, B852, B853, B854, B883

• Overlock

• Twin needle lockstitch machine

B842, B872, B845, B875, B847, B848, B837, B877, B878

• Post-type sewing machine P73, P81, C51

(Note) If the SW1-2, 5 or SW6-1, 2, 3, 4 settings are changed, the control box head setting will change to “7373”

(SW1-5: OFF) or “8423” (SW1-5: ON).

10.2 Setting the DIP switch maximum speed setting for the head

Single needle sewing machine (SW1-5 = OFF)

Head High speed DIP switch (SW1-6, 7, 8) setting

B737-3 4700 Set 850 rpm to 1000 rpm. B737-5 3500 (Values given in parentheses are the overlock rotation speeds.) B737-1 4000

B791-3 4500 B791-5 3500

B774-3 4500 B774-5 3500

B722-3 4700 B722-5 4000

B724-5 4000 B748-5 4000

B748-7 3000 B798 2000 B772 4700 B778 4700 B781 4000 B852 4500 B883 850 ovL 6000

8000

105

1000 (5000) rpm

2500 (6000) rpm

3500 (7000) rpm

4500 (8000) rpm

Low

2000 (5500) rpm

3000 (6500) rpm

4000 (7500) rpm

4700 (8500) rpm

Thread

Tack Stop

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Twin needle sewing machine (SW1-5 = ON)

Head High speed DIP switch (SW1-6, 7, 8) setting

B842-3 4000 Set 2200 rpm and 2400 rpm to 2500 rpm. B842-5 3500 Set 2600 rpm to 3000 rpm. B842-1 4000

B872 3000 B845 3000 B847 4000 B848 3000 B837 3000 B877 3000 B878 2500 P73/P81 2200

2400 2600

C51 2200

2400 2600

(Note) If the SW1-2, 5 or SW6-1, 2, 3, 4 settings are changed, the control box head setting will change to “7373”

(SW1-5: OFF) or “8423” (SW1-5: ON).

1000 rpm

2500 rpm

3500 rpm

2000 rpm

3000 rpm

4000 rpm

10.3 Setting the control box head setting for the head

The head must be set except for the B737 (B201) and B842. (Note) Only the maximum speed is set for the control box head setting. Note that the SW1-6, 7, 8 settings will have the

priority.

10.3.1 Setting procedure

q Before turning on the power, check that the motor pulley diameter matches the machine head. w Check the settings for DIP switch 1-2 (pulley size) and whether DIP switch 1-5 is set to single needle machines (overlock

machines) or twin needle machines.

e Change to machine head setting mode.

While pressing the sewing speed key ([

r Set the machine head.

1) Meaning of display

2) Setting method

10.3.2 Initializing the machine head setting value

1) When chaning the setting for DIP switches 1-2, 1-5 or 6 Initial value: [ 7 3 7 3 ] when switch 1-5 is OFF (single needle)

] represents the previous setting value.)

****

The machine head model appears in the ABC columns, and the sub-class appears in the D column. a) Press the B [

b) For the D column display, press the D [ ] · [ ] key to set the sub-class. c) Press the [

] · [ ] key to set the machine head model.

] key to end the setting and store the setting value.

[ 8 4 2 3 ] when switch 1-5 is ON (twin needle)

, turn on the power switch. [

] will appear in the ABCD display.

****

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10.4 Setting the control box speed setting for the head

Change the speed setting for the following head settings highlighted in gray. (1) Single needle

Head Inching Thread Slow Start End Improved

speed trimming speed backtacking backtacking stopping

[Lo] speed [tr] [SL] speed [Li] speed [Eb] [Po] B737/B201/B755 215 215 215 1800 1800 1700 B791 215 215 215 1800 1800 1700 B774 215 215 215 1800 1800 1700 B722 215 215 215 1800 1800 1700 B724 215 215 500 1600 1600 1700 B748 215 215 215 1200 1200 1700 B798/728 215 215 215 1000 1000 1700 B722A 215 215 215 1800 1800 1700 B778A 215 215 215 1800 1800 1700 B781 215 215 215 1800 1800 1700 B852/853/854 215 185 215 1200 1200 1700 B883 250 170 250 250 250 500 Overlock 215 215 215 1800 1800 1500

(2) Twin needle

Head Inching Thread Slow Start End Improved

speed trimming speed backtacking backtacking stopping

[Lo] speed [tr] [SL] speed [Li] speed [Eb] [Po] B842 250 185 250 1000 1000 1500 B872 250 185 250 1000 1000 1500 B845/875 250 185 250 1000 1000 1500 B847 250 185 250 1000 1000 1500 B848 250 185 250 1000 1000 1500 B837 250 185 250 1000 1000 1500 B877 250 185 250 800 800 1500 B878 250 185 250 800 800 1500 P73/P81 250 185 250 1000 1000 1500 C51 250 185 250 1000 1000 1500

10.4.1 Setting procedure

q Turn on the power switch and clear the [ABCD] display. w Press the [ e Press the [ r Press the [ ] key to change the type of speed displayed. t Press the B [ y Press the [ u Set the speed to match the machine head. Use the [ ] and [ ] keys to set the speed. i Press the [ o Press the B [ !0 When [ En ] appears, press the [ ] key. !1 Repeat steps o and !0 until the display disappears to end the procedure.

] key and the [ ] key at the same time. [ d 5 ] appears in the display. ] key and the [ ] key at the same time. [ S P ] appears in the display.

] key until the speed to be changed appears.

] key to display the current speed setting. ] key to return to the speed display.

] key until [ En ] is displayed.

Note:

• If you would like to set the maximum sewing speed and the start backtacking speed to be lower than the speed which has been set by DIP switch 1 or the speed set in speed setting mode [ S P ] The speed can be changed easily using the sewing speed key on the operation panel.

• The automatic sewing speed can only be set to be lower than the maximum sewing speed.

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11. Changing the function settings

The function settings can be changed by changing the memory switch settings. The operation timing, etc., can be changed by changing the parameter settings.

(Note) Operation panel F-40 or F-100 is required.

11.1 Example for changing the memory switch setting

11.1.1 When sewing thick materials, the needle may contact the material after thread trimming making it difficult to remove the stitched product. Thus, the setting is changed so lift the needle with reverse run after trimming the thread. (Set memory switch [ 61 ] to ON.)

1) Turn on the power switch, and erase the [ABCD] display. (When using F-100, set to pattern 1).

2) While pressing the [

3) Press the [ ] key. The first display will be [1 1 - o ] (OFF) or [1 1 - @ ] (ON).

4) Set the memory switch No. to [ 61 ] using the [A, B+/–] keys. (The default setting is [ 61 - o ] (OFF).)

5) Press the [D+] key, and turn memory switch [ 61 ] ON. ([ 61 - @ ] (ON))

6) Using the [A+/–] key, set the [AB] display to [ E n ], and then press the [

7) Using the [B+] key, set the [AB] display to [ E n ], and then press the [ setting will be completed.

11.1.2 If you would like better matching for backtacking, this momentarily pauses feed at the corners so that the backtack

seams match. (Set memory switch [ 6 8 ] is turned ON.)

1) Turn on the power switch, and erase the [ABCD] display. (When using F-100, set to pattern 1).

2) While pressing the [

3) Press the [ ] key. The first display will be [1 1 - o ] (OFF) or [1 1 - @ ] (ON).

4) Set the memory switch No. to [ 6 8 ] using the [A, B+/–] keys. (The default setting is [ 6 8 - o ] (OFF).)

5) Press the [D+] key, and turn memory switch [ 6 8 ] ON. ([ 6 8 - @ ] (ON))

6) Using the [A+/–] key, set the [AB] display to [ E n ], and then press the [

7) Using the [B+] key, set the [AB] display to [ E n ], and then press the [ setting will be completed.

] key, press the [ ] key. [ d S ] will appear at the [AB] display.

] key. [ d S ] will reappear.

] key . The [ABCD] display will disappear, and the

] key, press the [ ] key. [ d S ] will appear at the [AB] display.

] key. [ d S ] will reappear.

] key . The [ABCD] display will disappear, and the

11.2 Example for changing the parameter settings

11.2.1 If flickering of the fluorescent light is annoying when starting the motor, delay the motor startup and reduce the

power voltage fluctuation to reduce the fluorescent light flicker. (Change parameter [ M 6 ] from 10 to 30.)

1) Turn on the power switch, and erase the [ABCD] display. (When using F-100, set to pattern 1).

2) While pressing the [

3) Press the [B+] key. [ P A ] will appear at the [AB] display. If [ P A - - ] appears at the [AB] display, press the [B+] key twice, and return to the [ d S ] display. Then set the memory switch [01] ON.

4) If [ P A ] is displayed at the [AB] display, press the [

5) Repeatedly press the [B-] key, and set the [AB] display to [ M 6 ]. ([ M 6 1 0 ] (default setting)]

6) Using the [CD+/–] key, set the parameter value to 30. ([ M 6 3 0 ])

7) Press the [B+] key several times, set the [AB] display to [ E n ], and then press the [ to [ P A ]. ([ P A ])

8) Using the [B+] key, set the [AB] display to [ E n ], and then press the [ setting will be completed.

] key, press the [ ] key. [ d S ] will appear at the [AB] display.

] key. The first display will be [ t 0 0 2 ]. (Default setting value.)

] key. The [AB] display will return

] key . The [ABCD] display will disappear, and the

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12. Adjustments

12.1 Synchronizer Model DB2-B737·B748·B774·B791

0.5mm

Needle up stop

Higher

Lower

Thin, regular materials: 10-12mm Thick materials: 10-14mm

Needle down stop

18-22mm

Reference line

★ The synchronizer detects the needle position with two sensors.

The thread trimming signal is timed to the needle down position signal and the treadle reverse signal.

★ When the power is turned on and the needle stopped in the down position, the distance between needle plate top and

needle set screw bottom should be 18 to 22mm. When the needle is stopped in the up position and the pulley reference line is within the belt cover reference lines, the distance between needle plate top and needle tip should be 10 to 12mm with thin and regular materials, 10 to 14mm with thick materials. (With Model B748 the needle up stop position is 10-14mm.) Adjust as follows when necessary.

★ Turn the power off.

Needle up position

1. Slightly loosen the two screws q. Move the set screws q in the direction of normal pulley movement to raise the needle bar w stop position. Turn the other way to lower the needle bar.

Needle down position

1. Set the treadle to reverse and then release it to neutral. (This is the needle down stop position.)

2. The distance between the needle plate top and the needle screw bottom should be 18-22mm.

3. Loosen screw e and move the synchronizer r to adjust.

* Check the needle up stop position. * When the machine pulley is removed once, provide 0.5mm clearance between the pulley bottom and the synchronizer

for installation. (Improper clearance causes improper machine operation.)

When the synchronizer is out of order...

★ Turn off the power switch and disconnect the synchronizer cord.

Use the machine with standard function (without thread trimming) until the synchronizer is replaced.

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13. Troubleshooting guide

• If there seems to be a malfunction, first check the machine as described below. If the problem remains unresolved, turn off the power and contact your nearest Brother dealer. When using a model with the operation panel if an error displays on the operation panel refer to “13.1 Error display and details”.

Problem Where to check (after turning off the power)

1. The motor will not operate even though the power is on and the treadle is depressed.

(1) The power indicator (green LED) is

not illuminated.

Power indicator

→ Check the main power voltage. (Try

connecting the power cord to a different outlet.)

→ Check for a blown 8A fuse. FU will

flicker when using the operation panel. (The control box is defective so replace it.)

(2) The power indicator (green LED) is

illuminated.

→ Is the treadle pressed down?

• The treadle must be returned to the neutral position once after the power is turned on before operation can be started.

→ Turn the machine pulley lightly by

hand. If it is heavy or does not rotate, check the machine or motor.

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Problem Where to check (after turning off the power)

2. The machine will not operate at high speeds.

(1) Check if the speed adjustment knob

has been turned counterclockwise.

Speed adjustment knob

(2) The machine pulley does not turn

easily.

(3) The motor pulley is incorrect. → Check that the size of the motor

(4) The DIP switch settings are incor-

rect.

3. The machine stops while sewing. Voltage drop

Occurrence of various errors

→ Remove the belt from the machine

pulley and check the torque.

pulley being used matches the machine.

→ Check that the DIP switch settings

are adequate. Refer to “7.5.2 Other DIP switch functions”. If the pulley used and the DIP switch settings differ, the motor may continue to rotate when stopping from a high speed.

→ Check the power voltage. (Even if

the measured voltage is normal, if the wiring is too long or if branched wiring is used, the voltage may drop during sewing causing the reset function to activate and the machine to stop.)

→ Refer to “13.1 Error display and de-

tails”.

4. The machine does not stop in the needle down or needle up position after the treadle is returned to the neutral position.

Needle up position

Needle down position

Turn off the power switch, disconnect the synchronizer cord, and then turn the power switch back on. If the sewing machine stops when the treadle is at the neutral position, there is a problem with the synchronizer. If the sewing machine does not stop, there is a problem with the control box.

MD-602, 612

→ Replace the synchronizer.

→ Replace the control box.

Page 36

13.1 Error display and details

If an error occurs, an error code, etc., will display on the counter section of the operation panel. If the error display flickers, check the contents, turn the power switch OFF and remove the cause. Then, turn the power ON again.

Display

Details

Control box overheating, overcurrent, momentary failure of power supply

Power voltage too high

Load is too large

Motor or machine lock, synchronizer fault

8A fuse for solenoid blown Transformer error

Momentary drop or failure of power supply

Operation panel switch error (switch is always on)

Where to check (after turning off the power)

Is the load abnormally high?

Check the power voltage. The momentary power voltage may increase when the factory’s breaker trips, etc.

This error may occur during deceleration if the load inertia is too large.

Lightly rotate the machine pulley by hand and confirm that it turns. Check the details for the synchronizer in section 4 of the troubleshooting section.

Open the cover, and check the 8A fuse on the circuit board.

Check the power voltage. If the wiring is too long or if it is branched, the voltage may drop momentarily during starting.

Replace the operation panel.

All displays flash.

Operation panel connection error

Pulley setting and actual pulley differ.

Time overrun

Control circuit board memory element is faulty.

Check the operation panel connectors for disconnections or looseness. The operation panel may be faulty.

Set the DIP switches according to the machine head and pulley being used. (Refer to “7.5.2 Other DIP switch functions”.)

If the sewing machine has been running continuously for 3 minutes, it is stopped as a safety measure.

Replace the control box or control circuit board.

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13.2 Control box troubleshooting guide

Power PCB

PROBLEM CHECK PROBABLE CAUSE REMEDY When power SW is ON, LED

(Red) does not illuminate.

While running the motor OV or OL error sign appears.

Fuse F101, F102 blown? Short circuit of the load on the

power circuit. Something wrong with BD101? IPM? ZR? C101–C103, C111–C113? Power transformer?

Fuse F101, F102 OK? Has the R101 broken down?

Has the pattern blown?

CNR (40W/100ohm broken down?) F201 (2A fuse) blown?

OL error? Pressed the pedal so hard? Educate how to press the

40W/100ohm broken down? iGBT broken down?

Do not switch ON unless short circuit is solved.

Replace the R101 Replace power PCB

Replace 40W/100ohm Replace fuse, iGBT

pedal

Motor does not run smoothly and an error sign PT appears, sometimes.

While running, PT appears.

Motor does not run smoothly.

Motor start up is not good and motor does not rise in its rotation. Or, the power relay becomes OFF.

Treadle unit

Motor does not start when pressing the pedal

Malfunction by noise coming from outside. Malfunction by static electricity

Operation of IPM Something wrong with IPM, PHU-

Wirewould resistance of motor. Operation of PHU-PHZ Operation of IPM

Is power relay ON? Heating of the R101

resistor?

Is VC voltage right at pedal neutral position?

VC voltage when pedal is pressed fully forward

VC voltage does not change?

Is earth surely taken for the power supply? Is earth taken for the sewing head and box? Is earth good for motor and box?

PHW Measure wirewould resistance.

2.6ohm between each phases? Check IPM operation.

Is the contact point of power relay open? When the power switch is ON, the contact point is closed. Is R101 resistor broken?

Is there about 1.5V? Adjust by VR1

Is there about 4.5V? Adjust by VR2

Something wrong with #1? HO?

Take earth Take earth

Replace the power PCB

Replace motor

Replace power PCB Replace relay (RY).

The lead wire of relay is broken. Replace R101

Replace #1, HO.

Synchronizer

While running an error sign Lo appears.

Motor does not run smoothly. Motor rotate by doing inching.

Remove synchronizer cord and check operation. Machine and motor run

Remove synchronizer cord and check operation. No running of machine and motor

Remove synchronizer cord and check It rotate smoothly

It does not rotate smoothly.

No encoder signal, needle-up signal, needle-down signal.

Motor is locked. Motor Sewing head is locked. Adjust sewing head Others Control PCB? Something is wrong with the

encoder signals.

Motor is broken down or resistance value abnormal

Others Control PCB

MD-602, 612

Replace synchronizer

Motor

Page 38

Control PCB

When power is ON, an error sign FU appears.

the operation of sewing head and motor.

Power transformer

When power SW is ON, LED (Red) does not illuminate.

8A fuse blown? 8A fuse OK?

Check transistor for solenoid Check power transformer

Fuse F101, F102 blown? Check resistance value at the

primary side of transformer. Is there about 15ohm? Check BD101.

Replace fuse

Replace control PCBSomething is wrong with

Replace transformer

Replace BD101

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13.3 Checking the machine solenoids

1. Remove the load connector (12P connector) of the machine from the connector part of the control box.

2. Measure with the tester set in the resistance range × 1 as follows.

0 Ω pressed ∞ Ω released

7.4 Ω

Reverse solenoid

Connector from the machine head

Reverse switch

5.0 Ω 6.7 Ω

Thread wiper

solenoid

8.0 Ω 6.7 Ω

Thread trimming

solenoid

(B737)

GND

Presser foot lift connecter

Solenoid

9.5 Ω

Presser foot lift switch

0 Ω pressed ∞ Ω released

GND

Nipper

solenoid

Thread trimming

solenoid

(B883)

13.4 Checking the motor

1. Remove the motor cord (4P connector) from the connector part of the power board.

2. Measure with the tester set in the resistance range × 1 as follows.

GREEN/YELLOW

RED BLACK WHITE

MOTOR

2.6 Ω

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14. VR1 & VR2 setting of treadle unit

PS-INV Assy (MD-602, 612)

After changing this circuit board. Please adjust the volume (VR1, VR2) since we suppose that the voltage of each position may change due to the aberration of position of magnet and hole element when you set this circuit board onto the treadle base.

Points of adjustment;

Please adjust the position of P2 with VR1 and the position of P6 with VR2.

• Adjustment of the position of P2 means that the pedal-lever should be the neutral position.

• Adjustment of the position of P6 means that the pedal-lever should be the position of full with forward stepping opera-

tion.

DC-voltage PEDAL-LEVER NEUTRAL (P2) DC1.4 – 1.6V 14 – 16 1.5V PEDAL-LEVER FULL (P6) DC4.5 – 4.7V 45 – 47 4.6V

There are two adjusting ways as follows.

1. Please indicate the voltage after indicating (A3) in 7-segment display in (CP) check mode. (1) [ (2) [ (3) [ (4) [ (5) [ Then please adjust to display 14 – 16 in the neutral position, if you turn VR1 in clock-wise the value goes down.

Please adjust VR2 to display 45 – 47 in the full step position of pedal, if you turn VR2 in clock-wise the value goes up. Please adjust VR1, VR2 repeadly to locate the value within the above each limit.

2. Please measure the DC-voltage with the tester to put + pole to connecter No.2 and – pole to connecter No.3 and then adjust VR1 and VR2 to locate the volume within the above each limit.

] + [ ] [ d S ]

] + [ ] [ S P ]

] of B [ C P ] Input/output check mode

] [ A 3 ] HEXA

] [ A 3 ] DECMAL

DISPLAY OF OPERATION PANEL

TYPICAL

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Stroke – VC (analog voltage) Chart

Stroke – rpm chart

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15. Explanation of each mode

Besides the normal stitching mode, the head setting mode, initialization mode, and memory switch setting mode, etc., can be entered using the operation panel and various settings can be made. (If the power switch is turned ON while holding down the designated key, the initialization and head setting modes can be entered. If the designated key is pressed while the thread trimming needle is stopped at the UP position in the stitching mode, the memory switch setting mode, etc., can be entered.)

(Note) This function can be used only when the F-40 or F-100 operation panel is connected. This cannot be used with the

F-20 panel. Once the settings are made with the F-40 or F-100 operation panel connected, the set details will be registered even if the panel is disconnected.

Explanation of flow chart [

]... Indicates the display. [ ] ... Indicates a key operation. + ... Indicates simultaneous double operation.

15.1 Initialization mode

V arious data can be registered in the memory on the control PCB, and can be changed as required. If the data is changed by mistake, the data can be initialized with the initialization mode.

(Note) Only this function can be used with the F-20 panel.

[ ] + Power switch ON

Initialization mode [i n ]

When [ [ A L ] will display first.

Initialization mode menu

Entire memory initialization

] is pressed, the display will change to the initialization mode menu.

Initialize by pressing [ ]. Execute [ S n ]+[ M P ]+[ S P ]. [ C L ] will display when executed. The display will go out when the stitching mode is entered. The settings for head setting mode will also be initialized.

[ A L ]

[ ] of B

Initialization of No. of stitch data

[ S n ]

[ ] of B

Initialization of parameters and memory switches

[ M P ]

[ ] of B

Initialization of speed data

[ S P ]

[ ] of B

End code [ E n ]

[ ] of B

Initialize by pressing [ ].

Initialize by pressing [ ]. Initialize to parameters, etc., of head data set in head setting mode.

Initialize by pressing [ ]. Initialize to speed of head data set in head setting mode.

Not initialize by pressing [ ], and instead move to stitching mode.

Stitching mode

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15.2 Head setting mode

Before the motor is shipped from the factory, the motor product code is determined for each head and is set to match the specifications of the head. If the motor is to be used for another head, replace the pulley with an appropriate one, and select the head No. with this mode. The specifications will then match the head.

The backtack stitching timing, etc., differs slightly according to the head. Thus, setting this mode accurately is recommended.

A. Setting method

A-1. When SW1-5 is set to OFF (single needle)

] + Power switch ON

[

] of D

[ 7 3 7 3 ][ 7 3 7 5 ][ 7 3 7 1 ]

[

] of B

[

] of D

[ 7 9 1 3 ][ 7 9 1 5 ]

[

] of B

[ ] of D

[ 7 7 4 3 ][ 7 7 4 5 ]

[ ] of B

[ ] of D

[ ][ ]

[

] of B

Display No. [ 7 3 7 3 ] indicates DB2-B737-

A-2. When SW1-5 is set to ON (twin needle)

[ 7 3 7 5 ] indicates DB2-B737[ 7 3 7 1 ] indicates DB2-B737- 1.

[

] of D

[

] of D

[

] of D

[ ] of D

[

Stitching mode

[ ] of D

]

[ ] + Power switch ON

[

] of D

[

] of D [ ] of D

[ 8 4 2 3 ][ 8 4 2 5 ][ 8 4 2 1 ]

[

] of B

[

] of D

[

] of D

[ 8 7 2 3 ][ 8 7 2 5 ]

] of B

[

] of D

[

] of D

[

]

[ ][ ]

[ ] of B

Stitching mode

(Note 1) Only the maximum speed is set to match the head specifications, but the maximum stitching speed is limited by (Note 2) The settings will be registered when the [

the SW1-6, 7, 8 setting.

] key is pressed.

If the settings are not to be changed, turn the power switch ON again without pressing the [

] key.

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15.3 Memory switch setting mode and parameter setting mode, etc.

A memory switch mode for changing the functions and a parameter mode where the time and timing, etc., can be changed are provided.

Power switch ON

Stitching mode

(Note 1) These settings cannot be made with F (X)-20. Use F (X)-40 or F (X)-100. (Note 2) To prevent unintentional changes of the parameters, the parameter

setting mode cannot be entered unless the memory switch [ 01 ] is set to ON.

When the [ ] key is pressed while holding down the [ ] key, the setting

menu [ d S ] display will appear. <The state where the thread trimming needle is

stopped at the UP position and nothing is displayed for A, B, C and D must be

entered.> <When setting with the F-100, pattern 1 must be entered.>

Setting mode menu 1

Memory switch

setting mode

[ d S ]

] of B

[

Parameter setting

mode [ P A ]

] of B

[

]

[

Thread trimming validity

[

Start backtack double

[

— — —

[

]

[

Delay time to thread wiper ON

[

Thread wiper ON time

[ ] of B

— — —

[ ] of B

[

〈〈Memory switch setting mode〉〉

[ 1 1 - o ][ o ] : off, [ @ ] : on

Presser UP after thread trimming

] of A

[ 2 1 - o ]

] of A

End code

]

] of B

End code

]

[

〈〈Parameter setting mode〉〉(Note 2)

- o ]

[ ] of A

[ ] of B

— — —

[ E n ]

[ t 0 0 2 ] Setting can be changed with

[ ] and [ ] of [ CD ]. [ t 1 0 2 ]

[

[ E n ]

[ ] of B

[

] of B

[

] of B

]

[ 1 2 - o ]

End code

[ E n ]

] of B

[

After ending the setting mode menu 1 by pressing the [ ] key, the stitching mode is returned to.

MD-602, 612

Display changes to [ S P ] when

] + [ ] are pressed.

[

Setting mode menu 2

Stitching speed setting mode

] of B

[

Input/output check mode

] of B

[

ROM version mode

] of B

[

End code

]

[

[ S P ]

[ C P ]

[ r o ]

[ E n ]

Page 45

(Continued from previous page)

Stitching mode

[

] + [ ]

Setting mode menu 1

] + [ ]

[

〈〈Stitching speed setting mode〉〉

Setting mode menu 2

Stitching speed

setting mode

[ S P ]

] of B

[

Input/output

check mode

[ C P ]

] of B

[

[ ]

[

[ ]

Inching speed

]

Thread trimming speed

Stop improvement speed

[ ] key [ [ [ [ [ [ [ [

7-segment display [

[ ]

[ L o ]

[ 2 1 5 ]

Change with [

] keys

[

] and

[ ] of B

[ ]

[ t r ]

[ 2 1 5 ]

Change with [ ] and

] keys

[

[ ] of B

[

End code

] of B

[

[ P o ]

[ E n ]

] of B

[ ]

Change with [

] keys

[

[ 1 5 0 0 ]

] and

〈〈Input/output check mode〉〉

. . .

Reverse solenoid

. . .

] key ] key ] ( [ ] ) key ] LED ] LED ] LED ] LED ] LED

Thread trimming solenoid

. . .

Thread wiper solenoid

. . .

Needle UP signal

. . .

Needle DOWN signal

. . .

ENC signal

. . .

Actuator switch

. . .

Presser foot lifter switch, etc.

Presser foot lifter solenoid

. . .

A 3

]

Treadle Numerical value increases when pedal is pressed forward. Numerical value decreases when pedal is pressed back.

ROM version mode

[ r o ]

[

] of B

END code

[ E n ]

] of B

[

]

] ROM version display

[

〈〈ROM version mode〉〉

End the setting mode menu 2 when the [ return to the setting mode menu 1.

MD-602, 612

] key is pressed, and

Page 46

15.4 Stitching speed setting mode

Each speed can be changed as described below by using the stitching speed setting mode. q Setting of each stitching speed.

Normally, each speed determined by the product code corresponding to the head is set at the factory. To change the speeds, use the following procedures.

q-1 Press the [ q-2 Press the [ ] + [ ] keys, and enter the mode setting menu 2. q-3 Press the [ q-4 Select the speed type to be changed with the B [ q-5 When the [ ] key is pressed, the display will change to the setting speed (numerical value).

q-6 Set with the [ ] and [ ] keys. q-7 If the [ q-8 Press the B [ q-9 When the [ ] key is pressed, the mode setting menu 1 will be returned to. q-10 Press the B [ q-11 When the [

The display and order of each speed type are as follows.

Inching speed L o 1rpm unit 150-280rpm Speed for low-speed stitching and

Thread trimming speed t r 1rpm unit 150rpm–inching speed Speed for thread trimming Slow start speed 5 L 100rpm unit Inching speed–1000rpm Speed for slow starting Start backtack stitching Li 100rpm unit Inching speed–3000rpm Limit speed for start backtack

limit speed stitching End backtack stitching E b 100rpm unit Inching speed–3000rpm Limit speed for end backtack

limit speed stitching High-speed stitching limit Hi 50rpm unit Inching speed–DIP switch Limit value for maximum stitching

speed (Note 1) setting speed Automatic stitching speed A U 100rpm unit Inching speed-High speed High speed for automatic stitching

Stop improvement speed P o 100rpm unit 500-2500rpm Middle speed for stop time

] is pressed at this time, the sewing machine will rotate at that speed. The display will monitor the actual

If [ speed, and display it. If [

Speed type Display Setting unit Setting range Remarks

] key while holding down the [ ] key, and enter the mode setting menu 1. ] key, and enter the stitching speed setting mode.

] key.

] is pressed again, the sewing machine will stop.

] key is pressed, the display will return to the setting speed type.

] key several times, and display [ E n ]. ] key several times, and display [ E n ].

] key is pressed, the stitching mode will be returned to.

correction setting.

stitching limit speed

improvement

(Note 1) The upper limit of the maximum stitching speed limit value is limited by the SW1-6, 7 and 8.

If 5000rpm is set with SW1-6, 7 and 8, (when a maximum of 5000rpm.

(Note 2) If the SW1-2, 5, SW6 setting is changed, all these speed settings will be initialized.

The head settings will also be initialized. a) When SW1-5 is set to OFF (Initialized to head setting [ 7 3 7 3 ] ) b) When SW1-5 is set to ON (Initialized to head setting [ 8 4 2 3 ] )

105 pulley, single needle are designated), the speed can be set to

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16. Operational instructions

16.1 When the power SW is ON

• The motor power is created with the rectifying circuit and smoothing capacitor on the power PCB. To suppress the rush current, the smoothing capacitor is charged through the resistor . After charging, the relay contact closes and the smoothing capacitor is directly connected to the rectifying circuit.

• The solenoid power is 40VDC. This is created by rectifying and smoothing the 30VAC from the power transformer using the control PCB.

• For the control power, +5V and +8V stabilized power is created on the control PCB. The stabilized power is a dropper type.

• When the power is turned ON, connection of the operation panel and material edge sensor is checked. If these are not connected, the tacking function on the control box is validated.

• When the power is turned ON, connection of the synchronizer is checked. If the synchronizer is not connected, operation in the manner of a clutch motor will take place. As performance as a servomotor is not attained, this is not recommended unless the synchronizer is faulty.

16.2 When the power SW is OFF

• This motor has no special processes when the power is OFF.

• It takes approximately five minutes for the motor power’s smoothing capacitor to discharge after the power is turned

OFF. Make sure that the LED (red) on the PCB is OFF before starting maintenance of the power PCB.

16.3 Operation of the pedal

• The treadle unit outputs an analog voltage according to the pedal position. The control unit reads this voltage and converts it into a motor command.

• If it is not detected that the pedal is at the neutral position when the power is turned ON, the motor will not start. The neutral position is the treadle unit output 1.5V±0.4V.

16.4 While running

• The motor is controlled by controlling the 3-phase inverter’s output frequency and output voltage. [ P t ] (power transistor error): Error when an error signal is received from the power PCB output element.

• The sewing machine pulley’s rotation speed is detected by the sewing machine head’s synchronizer. Feedback is controlled to reach the commanded speed. [ L o ] (lock): Error that occurs if the synchronizer signal is not detected for three seconds. [ P U ] (pulley error): Error that occurs if the sewing machine rotation exceeds the maximum speed setting. (The pulley setting is incorrect.)

• The motor drive power voltage is constantly checked, and the required control is executed. The following voltages are detected. [ O u ] (overvoltage): Error that occurs when 304VAC is exceeded. [ O L ] (overload): Error that occurs when a level 290VAC or more continues for 160ms.

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17. Memory switch list

* The shaded fields indicate the default values.

Display No. SW Item & Contents

ON Parameter setting change enabled (Parameter setting mode can be entered)

01 02

03 04 05 06 07 08

1 1

1 2

1 3 1 4 1 5 1 6

1 7

1 8

OFF Parameter setting change disabled (Parameter setting mode cannot be entered)

ON No interlock during thread trimming

OFF No interlock during thread trimming (Invalid)

ON Momentary drop or failure of power supply check valid

OFF Momentary drop or failure of power supply check (lnvalid)

ON SBT speed and EBT speed (No relation with high speed setting)

OFF SBT speed and EBT speed (No more than of high speed setting)

ON (Not used)

OFF *Normally OFF

ON No penetration force UP operation

OFF Penetration force UP operation

ON (Not used)

OFF * Normally OFF

ON (Not used)

OFF * Normally OFF

OFF

ON Presser lifter rise after neutral stop when the treadle is neutral stop.

OFF Presser lifter descent after neutral stop when the treadle is neutral stop.

ON (Not used)

OFF * Normally OFF

ON Normally is deceleration

OFF Quick stop is deceleration

ON No over time [o t] function

OFF Over time [o t] function (By a continuous 3 minutes stop)

OFF

Thread trimming validity setting enabled (F-operation panel is connected) * [

] ON enabled, [ ] OFF not enabled

Thread trimming validity setting disabled (Treadle repression always includes thread trimming)

Presser lifter rise after thread trimming when the treadle is neutral (In the case of SW1-1 ON) Presser lifter descent after thread trimming when the treadle is neutral (In the case of SW1-1 OFF)

Presser lifter descent after thread trimming when the treadle is neutral (In the case of SW1-1 ON) Presser lifter rise after thread trimming when the treadle is neutral (In the case of SW1-1 OFF)

[

] OFF, Actuator switch = Half stitch correction switch

[

] ON, Actuator switch = 1 stitch correction switch

[

] OFF, Actuator switch = Normally switch

[

] ON, Actuator switch = 1 stitch correction switch

[

] OFF, Actuator switch = Reverse stitch correction switch

[

] ON, Actuator switch = 1 stitch correction switch

[ ] OFF, Actuator switch = Normally switch [

] ON, Actuator switch = 1 stitch correction switch

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Page 49

Display No. SW Item & Contents

ON Start tacking double (A, B, A, B)

21 22 23 24

26 27

28 31

34 35

OFF Start tacking single (A, B)

ON End tacking double (C, D, C, D)

OFF End tacking single (C, D)

ON No. of start tacking stitches + 10 (A + 10 , B + 10)

OFF Normally (A, B)

ON No of end tacking stitches + 10 (C + 10, D + 10)

OFF Normally (C, D)

OFF

ON No slow down to low speed on starting of end tacking

OFF

ON Continuous tacking A, B [stitches] × D [Number of time]

OFF Continuous tacking A, B, C, D

ON No. of continuous tacking stitches + 10 stitches

OFF Normally

OFF Not enable to stop during start tacking, speed is keep speed by treadle. (start tacking speed)

OFF * No. of stitches is fixed with 4, when switch F-20 [

ON Call fixed stitches when pleats sewing will be used.

OFF No call fixed stitches when pleats sewing will be used.

ON No LED call when continuous tacking [ ] is canceled

OFF Set [

ON Soft down of presser lifer is timer mode (OFF time is [ F3 ], ON time is [ F4 ] )

OFF Soft down of presser lifter is analog mode (ON time is [ F4 ] of setting timer)

ON Holding time control of presser lifter is not OFF by timer

OFF Holding time control of presser lifter is not ON by timer (ON time is [ F1 ] of setting timer)

OFF

Root stitching (Stop with reverse ON after start tacking) * Active, when [

Stop with reverse OFF after start tacking * Active, when memory switch [68] is set OFF.

Slow down to low speed on starting of end tacking After end tacking goes into acceleration

Enable to stop during start tacking, speed is variable with treadle. (start tacking speed at maximum treadle repression)

F-20, 40 No. of tacking stitches change enabled * Tacking stitches are ABCD set No.

F-20, 40 No. of tacking stitches change disabled.

* No. of AB tacking stitches are sewn when switch F-40 of [

LED call when continuous tacking [ ] is canceled.

], [ ], [ ], [ ], [ ] is call back.

When [

Chopping duty of presser lifter setting

] switch is OFF.

37 38 ON OFF Transistor controlling

OFF OFF 2.5ms 2.5ms

ON OFF 1ms 1ms

OFF ON 1ms 5ms

ON ON 1ms 1ms

] is ON and memory switch 31 is set OFF.

], F-40 [ ] ON.

Upper and lower transistor ON/OFF at a same time

Upper transistor keep ON, lower transistor ON/OFF.

] [ ] ON.

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Display No. SW Item & Contents

ON Lifting of presser lifter invalid at treadle repressed backwards to 1st step

41 42 43

44 45

47 48

51 52 53 54

57 58

OFF Normally

ON Prohibit to thread trimming by treadle repressed backwards * For overlock, etc.

OFF Normally

ON Chain stitch thread trimming (at needle UP position, motor stopped)

OFF Lockstitch thread trimming operation

OFF Standing work pedal for variable speed

ON Standing work delay start invalid

OFF Standing work delay start valid

OFF

ON Prohibit to rise of presser lifter with trimming pedal during standing work

OFF Normally

ON Active correction by actuator switch after trimming

OFF Inactive correction by actuator switch after trimming

ON (Not used)

OFF * Normally OFF

ON (Not used)

OFF * Normally OFF

ON (Not used)

OFF * Normally OFF

ON After repressing treadle backward, presser foot lowers when treadle is pressed to neutral

OFF After repressing treadle backward, presser foot does not lift when treadle is pressed to

OFF

ON Presser foot does not lower when treadle is pressed forward 1st step.

OFF Presser foot lowers when treadle is pressed forward 1st step.

ON (Not used)

OFF * Normally OFF

High-speed pedal during standing work is only high speed. (no inching speed and variable speed area)

Emergency stop by presser pedal disabled during standing work (during automatic stitching)

Emergency stop by presser pedal enabled during standing work (during automatic stitching)

Emergency stop by high-speed pedal disabled during standing work (during automatic stitching)

Emergency stop by high-speed pedal enabled during standing work (during automatic stitching)

After presser foot lowers with treadle repressed forward to 1st step, presser foot does not lift when treadle is pressed to neutral position.

position. * Whent SW1-1 is ON (when memory switch [12] or [13] is set to ON)

After presser foot lowers with treadle repressed forward to 1st step, presser foot lifts when treadle is pressed to neutral position.

neutral position * When SW1-1 is ON (when memory switch [12] or [13] is set to ON)

After thread trimming, pressing treadle forward ON stroke is not changed after pressing treadle backward.

After thread trimming, pressing treadle forward ON stroke is changed after pressing treadle backward. * Reduction of incorrect forward treadle repressing operation caused by rebound of treadle

from backward repressing

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Display No. SW Item & Contents

ON Reverse rotation needle UP operation enabled

65 66 67

71 72 73

74 75 76 77 78

When one is turned to ON, the other will be set to OFF. IF all are set to OFF, the puller output will be applied. ON when presser or reverse solenoid is ON. OFF after the No. of stitches (parameter [C0]) or after 10 seconds have passed.

OFF Reverse rotation needle UP operation disabled

OFF

OFF Thread trimming is turned ON with needle DOWN signal, and OFF with needle UP signal

ON reverse rotation needle UP position

OFF

ON (Not used)

OFF * Normally OFF

OFF When reverse needle UP operation is enabled, presser turns ON after needle UP

ON (Not used)

OFF * Normally OFF

ON tacking will be same.

OFF

ON Output during running (needle cooler, etc.)

OFF * Normally OFF

ON Thread release output (3 position)

OFF * Normally OFF

ON Air (ON while the No. of stitches (parameter [C1]) & after fabric edge sensor turns ON.)

OFF Normally OFF

ON Condense output (ON while stitching [A] when B = 0, ON while stitching [D] when C = 0 )

OFF * Normally OFF

OFF Normally OFF

OFF * Normally OFF

ON (Not used)

OFF * Normally OFF

ON (Not used)

OFF * Normally OFF

When reverse rotation needle UP operation is enabled, raise needle and then wipe. * When memory switch [61] is ON

When reverse rotation needle UP operation is enabled, wipe and then raise needle. * When memory switch [61] is ON

Timer operates thread trimming * When B852 is set , timer time is set with parameter [ d0 ].

When needle is raised and stop with [ ] key and actuator switch, needle stops at * When memory switch [61] is ON

When needle is raised and stop with [ UP position

When reverse needle UP operation is enabled, presser turns ON before needle UP. * When memory switch [62] is set to OFF, presser turns ON after thread wiping

Sewing machine stops temporarily when automatic tacking reverse solenoid is changed over. * Machine can stop when switching to reverse of automatic tacking so that stitch length of

Parameter [ b4 ]: stop time can be set (initial: 100ms) Parameter [ b5 ]: temporary stop position can be set

Sewing machine does not stop temporarily when automatic tacking reverse solenoid is changed over

Program output 1 (ON after thread trimming, after T0 (parameter [C2]), during T1(parameter [C3]))

Program output 2 (ON during presser synchronization, after T2 (parameter [C4]) during T3 (parameter [C5]))

] key and actuator switch, needle stops at needle

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Display No. SW Item & Contents

ON (Not used)

81 82

85 86

88 91 92

93 94

95 96 97

OFF Normally OFF

ON (Not used)

OFF Normally OFF

OFF

ON * Inching speed can be set to slower than thread trimming speed to facilitate 1 stitch

OFF Inching speed ≥ Thread trimming speed

OFF Speed of end tacking = Speed of end tacking

ON Servo lock timer OFF operation disabled

OFF Servo lock timer OFF operation enabled

OFF

ON Servo lock enabled

OFF Servo lock disabled

ON (Not used)

OFF Normally OFF

ON (Not used)

OFF Normally OFF

OFF Treadle operation invalid after standing work

ON (Not used)

OFF Normally OFF

ON (Not used)

OFF Normally OFF

ON (Not used)

OFF Normally OFF

ON (Not used)

OFF Normally OFF

ON (Not used)

OFF Normally OFF

Presser foot rise by treadle is always active. * Only when SW1-1 is set to OFF

Presser foot rise by treadle is not active after use of knee switch (presser lifter switch). * Only when SW1-1 is set to OFF

Inching speed < Thread trimming speed

sewing.

Speed of end tacking = Speed of start tacklng * Setting speed of end tacking to same as start tacking

Brake force increases with presser UP/DOWN signal * When memory switch [88] is set to ON

Brake force does not increase with presser UP/DOWN signal * When memory switch [88] is set to ON

Treadle operation valid after standing work (during simultaneous operation, standing work has priority)

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18. Parameter list

(Note) The default data is the value set in B737 with the machine head setting.

Display No. Initial data

02 00 to 90 (×10)

t0 t1 t2 F0

F1 F2

F3 F4

(20ms) (0 to 990ms) 05 00 to 90 (×10)

(50ms) (0 to 990ms) 05 00 to 90 (×10)

(50ms) (0 to 990ms) 30 00 to 90 (×10)

(300ms) (0 to 990ms)

60 (0 to 30 sec) 00 : Does not turn OFF automatically (3 min) 31 to 96 (×5) 01 to 30 : 1 to 30 sec (Set in one second increments)

15 00 to 99 (×10) (150ms) (0 to 990ms)

00 00 to 99 (×2) Presser UP signal OFF time (soft down) (0ms) (0 to 198ms) * Valid only when memory switch [35] is set to ON

00 00 to 30 (×10) (0ms) (0 to 300ms)

00 00 to 99 (not used)

Data setting

range

Thread wiper ON delay time

Thread wiper ON time

Wiper OFF to presser lifting ON delay time

Presser lifter full-ON time

00 to 30 (×10) Holding time of presser lifter

(35 sec to 6 min) 31 to 96 : 35 sec to 6 min (Set in five seconds increments)

Delay time from presser lifter is lowered to motor start.

Presser up signal ON time (soft down)

Detailes

F6 F8 F9

FA b0

b1 b2

b3 b4

00 00 to 99 (not used)

07 01 to 99 (not used)

10 01 to 99 (not used)

24 00 to 47 (pulse) (pulse)

24 00 to 47 (The larger the value is, the larger the timing delays.) (pulse) (pulse) (The smaller the value is, the faster the timing becomes.)

10 05 to 50 (×10) Stop time during reverse change timing (100ms) (50 to 500ms) * When memory switch [68] is set to ON

11 00 to 23 (pulse) (pulse)

Start tacking A → B reverse solenoid ON timing (The larger the value is, the larger the timing delays.) (The smaller the value is, the faster the timing becomes.)

Start tacking B end reverse solenoid OFF timing (The larger the value is, the larger the timing delays.) (The smaller the value is, the faster the timing becomes.)

End tacking C → D reverse solenoid ON timing (The larger the value is, the larger the timing delays.) (The smaller the value is, the faster the timing becomes.)

End tacking D → C or C ON reverse solenoid ON timing

* When memory switch [22], [26] is set to ON

Temporary stop position during reverse change timing (Number of pulses from needle UP signal) * When memory switch [68] is set to ON

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Display No. Initial data

00 00 to 99 No. of stitches to puller lower

C0 C1 C2 C3 C4

C5 C6

(stitch) (stitch) (Memory swtches [71]-[78] all OFF, factory setting) 10 00 to 99 No. of option output ON stitches (N)

(stitch) (stitch) (When memory switch [73] is set to ON) 05 00 to 90 (×10) Delay time to program output 1 ON (T0)

(50ms) (0 to 990ms) (When memory switch [75] is set to ON) 08 00 to 90 (×10) Program output 1 ON time (T1)

(80ms) (0 to 990ms) (When memory switch [75] is set to ON) 00 00 to 99 (×10) Delay time to program output 2 0N (T2)

(0ms) (0 to 990ms) (When memory switch [76] is se to ON) 20 00 to 90 (×0.1) Program output 2 ON time (T3)

(2s) (0 to 9.9s) (When memory switch [76] is set to ON) 00 00 to 99 (×10)

(0ms) (0 to 990ms) 02 00 to 09

(stitch) (stitch)

Data setting

range

Detailes

Thread release OFF delay-time

* When B781 is set

* Time to OFF after needle trimming stop Slow start number of stitches

C8 C9 CA Cb CC Cd CE CF d0 d1 d2

00 00 to 99 (not used)

00 01 to 99 (not used)

00 00 to 99 (not used)

10 00 to 99 (not used) 18 00 to 99 (×5) Thread trimmer ON time * For B852

(90ms) (0 to 495ms) * When memory switch [63] is set to ON 08 00 to 20 (×10)

(80ms) (0 to 200ms) 00 00 to 24 (not used)

Standing work delay start time

d3 H0

H1 H2

00 00 to 99 (not used)

66 40 to 70 (not used)

03 00 to 30 (×1) (3 min) (0 to 30 min)

00 00 to 99 (not used)

Overtime detection time * When memory switch [16] is set to OFF (function valid) * Overtime not detected when 00 is set

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Display No. Initial data

DOM. 0.5V 00 to 04 EXP. 0.4V

02 (1.1V) (When the numerical value is large, the stroke to the presser lifter

02 Treadle stroke, forward 1st step (presser DOWN point) DOM. None 00 to 04 (When the numerical value is large, the stroke to presser foot EXP. 1.9V lowering is long)

02 (When the numerical value is small, the stroke to the motor start DOM. 2.0V 00 to 04 is short) EXP. 1.9V (When the numerical value is large, the stroke to the motor start

02 (When the numerical value is small, the variable speed area will DOM. 2.6V 00 to 04 increase) EXP. 3.0V (When the numerical value is large, the inching speed area will

02 (4.2V)

02 00 to 04

02 00 to 04 area is short)

Data setting

range

Treadle stroke, treadle backward repression to 1st step (presser point) (When the numerical value is large, the stroke to thread trimming is short) (When the numerical value is small, the stroke to thread trimming is long)

Treadle stroke, treadle backward repression to 1st step (presser

00 to 04

00 to 04 area is short)

UP point)

ON is short)

Treadle stroke, inching start point

is large) Treadle stroke, variable speed range start point

increase) Treadle stroke, high speed reach point

(When the numerical value is small, the stroke to the high speed

(When the numerical value is large, the variable speed area will increase)

Standing work pedal for variable speed, variable speed range start point (When the numerical value is small, the variable speed area will increase) (When the numerical value is large, the inching speed area will increase)

Standing work pedal for variable speed, high speed reach point (When the numerical value is small, the stroke to the high speed

(When the numerical value is large, the variable speed area will increase)

Detailes

M0 M1 M2 M3 M4 M5

07 04 to 50 (don’t change)

15 05 to 30 (don’t change)

10 05 to 30 (don’t change)

10 00 to 70 (don’t change)

10 01 to 23 (don’t change)

10 00 to 70 (don’t change)

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Display No. Initial data

10 07 to 50 (×10) Starting time (When the numerical value is small, the motor will

M6 M7

(100ms) (70 to 500ms) start up faster) 10 07 to 50 (×10) Stopping time (When the numerical value is small, the motor will

(100ms) (70 to 500ms) stop faster)

Data setting

range

Detailes

M8 M9 MA Mb MC Md ME

MF MG

MH Mi

15 01 to 40 (don’t change)

20 01 to 20 (don’t change)

07 01 to 20 (don’t change)

15 01 to 20 (don’t change)

07 01 to 20 (don’t change)

28 04 to 70 (don’t change)

14 04 to 70 (don’t change)

20 04 to 70 (don’t change)

10 01 to 20 (don’t change)

24 04 to 70 (don’t change)

50 10 to 99 (don’t change)

40 05 to 70 (don’t change)

15 00 to 50 (don’t change)

ML MM

05 00 to 70 (don’t change)

05 01 to 30 (don’t change)

15 01 to 30 (don’t change)

20 01 to 99 (don’t change)

30 01 to 99 (don’t change)

(Note) Parameters [ M0 ] ∼ [ M5 ], [ M8 ] ∼ [ MQ ] must not be changed. If they are changed by mistake, initialize the

parameters with the initialization mode.

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19. Panel display table

The following alphabetic characters and symbols are displayed on the operation panel.

7-segment display 7-segment display 7-segment display 7-segment display 0 0 A A N n ON @ 1 1 B B O o OFF o 2 2 C C P P 3 3 D d Q Q 4 4 E E R r 5 5 F F S S 6 6 G G T t 7 7 H H U U 8 8 I i V u 9 9 J J W W + + KX

- - L L Y M M Z

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20. How to remove the control box

q. Disconnect the synchronizer cord. w. Loosen the two screws, and open the box’s cover.

Un voltaje inadecuado

Hazardous voltage

Un voltage non adapté

Hochspannung

puede provocar las

will cause injury.

provoque des blessures.

verletzungsgefahr!

heridas.

Turn off main

Eteindrel'interrupteur et

Bitte schalten sie den

Apagar el interruptor

switch and wait 5

attendre 5 minutes

hauptschalter aus und

principal y esperar 5

minutes before

avantd' ouvrir le capot

warten sie 5 minuten,

minutos antes de abrir

opening this cover.

bevor sie diese

esta cubierta.

abdeckung öffnen.

e. Disconnect the cords from the machine and panel. r. Disconnect the motor connector . t. Disconnect the power supply connector and bushing. y. Loosen the screws fixing the control box to the motor by about half. (Two places)

u. In the same manner, loosen the screws on the opposite

side by about half. (Two places)

MD-602, 612

i. Slide the control box to the right.

o. Lower the control box. !0. Install the control box, following the above instructions

in reverse.

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J03766001

NAME CONTROL PCB ASSY, MD602

CODE J80900001

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NAME CONTROL PCB circuit (1/3)

NOTE MD602/612

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NAME CONTROL PCB circuit (2/3)

NOTE MD602/612

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NAME CONTROL PCB circuit (3/3)

NOTE MD602/612

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NAME TREADLE PCB assy (B47A127)

CODE J80875001

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BROTHER INDUSTRIES, LTD. NAGOYA, JAPAN

Printed in Japan

J90113-001

2001. 06.

Brother MD-602 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

SAFETY INSTRUCTIONS

1. SAFETY INDICATIONS AND THEIR MEANINGS

2. CAUTIONS WITH REGARD TO SAFETY

3. WARNING LABEL

1. Outline

2. Operation panel and options

3. Model configuration

4. Explanation of the name plate

5. Installation

5.1 Installing the motor to the work table

5.2 Attaching the belt

5.3 Installing the belt cover

5.4 Connecting the connecting rod

5.5 Adjusting the belt cover safety mechanisms

5.6 Connecting the cords

5.7 Installing the head lamp

5.8 Connecting the external operation panel

6. Adjusting the treadle unit

6.1 Operating the treadle

6.2 Adjusting the treadle

6.3 When using the automatic presser foot lifter device

7. Using the control box

7.1 Before turning on the power switch

7.2 Power switch and power indicator

7.3 Setting the sewing speed

7.4 Control box DIP switch setting procedure

7.5 Description of functions

7.6 Periodic checks

8. Connecting options

8.1 Connecting the pedal for standing operations

8.2 Connecting the material edge sensor

9. Using the operation panel F-40

10. Changing the head settings

10.1 Setting the motor pulley size and DIP switches for the head

10.2 Setting the DIP switch maximum speed setting for the head

10.3 Setting the control box head setting for the head

10.4 Setting the control box speed setting for the head

11. Changing the function settings

11.1 Example for changing the memory switch setting

11.2 Example for changing the parameter settings

12. Adjustments

13. Troubleshooting guide

13.1 Error display and details

13.2 Control box troubleshooting guide

13.3 Checking the machine solenoids

13.4 Checking the motor

14. VR1 & VR2 setting of treadle unit

15. Explanation of each mode

15.1 Initialization mode

15.2 Head setting mode

15.3 Memory switch setting mode and parameter setting mode, etc.

15.4 Stitching speed setting mode

16. Operational instructions

16.1 When the power SW is ON

16.2 When the power SW is OFF

16.3 Operation of the pedal

16.4 While running

17. Memory switch list

18. Parameter list

19. Panel display table

20. How to remove the control box