Brother Md-612
Brother Md-612
Brother Md-612
SERVICE MANUAL
MD-602 (Single-Phase Power Specifications)
MD-612 (Three-Phase Power Specifications)
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Contents
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
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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
Indications
Failure to observe the instruction which appears after this indication while using the motor
WARNING will result in death or severe injury to the user.
Failure to observe the instructions which appear after this indication while using the motor
CAUTION 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 that the ground connection must be made.
This symbol is used to indicate general actions which you must do.
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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 opera-
tion 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.
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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.
Warning label
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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.
1.3 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.
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2. Operation panel and options
Attachable operation panel F-20 (X-20)
F-40 (X-40)
F-100 (X-100)
Attachable options Standing work pedal
Material edge sensor (Connect to S2 operation panel and use)
(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.
Operation panel
Sewing machine Installation Type Code no. of
model type operation panel Foot plug J02824-001
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
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3. Model configuration
1 3 7 6 0 2 7 3 3 5 5
Single/3-phase
0 Single-phase
1 3-phase
For single-phase
Voltage Switch Destination
0 240V SAA compatible part Australia
1 110V Standard part General
2 110V With OCR USA
Compatible head
3 110V SJT Canada
Single needle Twin needle
4 230V None Europe
0 B774 E B842
5 220V Standard part General
1 B748A F B872
6 230V Standard part Greece
2 B798/728 G B845/875
7 230V Standard part General
3 B722 H B847
8 230V SAA compatible part New Zealand
4 B724 J B837
9 100V Domestic specifications Japan
5 B201 K B877
A 240V Standard part General
6 B791 L B878
B 110V SJT + OCR Canada
7 B737 M P73/P81
C 220V With OCR General
8 B852/853/854 N C51
D 220V SJT + OCR Canada
9 B883 P B848
E 220V FOR B883 General
A Overlock
B B772A For 3-phase
C B778A Voltage Switch Destination
D B781 0 200V Domestic specifications Japan
1 220V Standard part
2 220V With OCR USA
3 220V With SJT Canada
B 220V With SJT & OCR Canada
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4. Explanation of the name plate
Control box name plate
****** PHASE
OUT PUT 400W
MD-6*2*-* VOLTS *********
CONTROL BOX HERTZ 50/60
TYPE B qwert FOR MD-60A
MADE IN JAPAN
NO. yuio!0!1!2!3!4 BROTHER INDUSTRIES, LTD.
display
phase voltage
phase voltage
Motor name plate single 110V SINGLE 110
single 220V SINGLE 220 230 240
OUT PUT 400W single 230V SINGLE 220 230 240
MD-60A R.P.M. 3500
single 230V CE SINGLE 230
SUPPLIED FROM CONTROL BOX
MD-602/612 single 240V SINGLE 220 230 240
AC SERVO MOTOR MADE IN JAPAN
BROTHER INDUSTRIES, LTD. three 220V THREE 220
NO. yuio!0!1!2!3!4
q Treadle type maximum
e
C One forward and speed (rpm)
production ui year (2 digits) one back step 0 1000
y
date D Two forward and 1 2000
two back step
A January 2 2500
o factory
B February 3 3000
9 Kariya w Pulley size
C March 4 3500
D April 3 φ 90 5 4000
E May !0 modification No. 4 φ 105 6 4500
F June 7 5000
G July t standard 8 6000
!1!2!3!4 serial No.
H August 0 None 9 8000
J September A Australia A 2200
K October E CE B 2400
L November C 2600
M December D 6500
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5. Installation
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
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.
3-φ8.5
q
w
q e
u
66
e
r 57 159
t
y
Hazardous voltage Hochspannung Un voltage non adapté Un voltaje inadecuado
will cause injury. verletzungsgefahr! provoque des blessures. puede provocar las
heridas.
Turn off main Bitte schalten sie den Eteindrel'interrupteur et
switch and wait 5 hauptschalter aus und attendre 5 minutes Apagar el interruptor
minutes before warten sie 5 minuten, avantd' ouvrir le capot principal y esperar 5
opening this cover. bevor sie diese minutos antes de abrir
abdeckung öffnen. esta cubierta.
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.
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5.3 Installing the belt cover
1. Secure the belt cover q to the motor e with the two
q screws w as shown in the illustration. At this time, po-
sition the belt cover q so that it does not touch the belt.
e 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.
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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
Power switch
Ground symbol
Power cord
Mounting bracket
grounding screw
Ground
Green/yellow
Hazardous voltage Hochspannung Un voltage non adapté Un voltaje inadecuado
will cause injury. verletzungsgefahr! provoque des blessures. puede provocar las
heridas.
Turn off main Bitte schalten sie den Eteindrel'interrupteur et
switch and wait 5 hauptschalter aus und attendre 5 minutes Apagar el interruptor
minutes before warten sie 5 minuten, avantd' ouvrir le capot principal y esperar 5
opening this cover. bevor sie diese minutos antes de abrir
abdeckung öffnen. esta cubierta.
• Loosen the two screws q, and then gently pull the e Synchronizer cord
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.
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For machine solenoid For presser foot lifter
12-pin plug
6-pin plug
Note:
The puller output is output from the option output during machine operation with the
settings made at shipment from the factory.
Resistor
Note the following points when connecting to the option output terminals. Approx.
a. Connect a solenoid or air valve with a resistance of 10 Ω or greater. 40 V
b. The voltage between the terminals should be equivalent to 40 V DC. When con-
Air valve
necting an air valve, connect a resistor in series so that the rated voltage is ob-
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”.)
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5.7 Installing the head lamp
CAUTION
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.
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.
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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 q
Low speed w
High speed e
r Thread trimming
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.
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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 q
Low speed w
High speed e
r Thread trimming
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 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.
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6.2 Adjusting the treadle
CAUTION
Turn off the power switch before starting work, otherwise the motor may operate, which could result in injury.
F
E
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7. Using the control box
CAUTION
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.
1. Are all connectors connected correctly? Refer to “5.6 Connecting the cords”.
• Synchronizer connector
• Sewing machine connector
• Ground cord
2. Is the sewing machine cord touching the V-belt? Refer to “5.1 Installing the motor to the work table” and
Is the belt tension correct? “5.2 Attaching the belt”.
e Power indicator
r Speed adjustment knob
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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.
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7.5 Description of functions
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
e Start backtack LED q 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.
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7.5.1.3 Setting the number of backtack stitches
!0
t y u i
Display A B C D
DIPSW No. SW3 SW2
No. of stitches 1 2 3 4 5 6 1 2 3 4 5 6
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 ON ON ON ON ON ON ON ON ON ON ON ON
• 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.
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7.5.2 Other DIP switch functions
7.5.2.1 DIP switch 1 o functions
ON Presser foot is lowered when treadle is returned to neutral position immediately after thread trimming. (Export specifications)
SW1-1
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
SW1-2
OFF Motor pulley diameter 105 mm
ON Automatic presser foot lifter device used
SW1-3
OFF Automatic presser foot lifter device not used
ON Stopping position when treadle is at neutral is needle up stop position.
SW1-4
OFF Stopping position when treadle is at neutral is needle down stop position.
ON Twin needle
SW1-5
OFF Single needle
ON Limit speed setting 1
SW1-6
OFF
ON Limit speed setting 2
SW1-7
OFF
ON Limit speed setting 3
SW1-8
OFF
Setting for limit speed (sewing machine’s maximum sewing speed) ( ) is for overlock machines
Speed (rpm) 1,000 2,000 2,500 3,000 3,500 4,000 4,500 4,700
DIP switch (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 Single-needle machine and overlock machines setting
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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 Con-
necting the external operation panel” for the operation panel connection methods. Refer to each respective instruction
manual for details on the options.
e
Foot plug cap i
t 3. Loosen the screw r (do not remove it), and then turn
!2 r the connector presser plate t approximately 90°
A
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
o !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 illus-
tration, and then securely insert the 7-pin connector !0
of the circuit board into the 7-pin connector !4 of the
!1 control circuit board.
!4
!0
u Foot plug assembly NDD
!3
!6 !1
o
r
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• Connector wiring diagram
HIGH. S HIGH. S
+8V +8V
TRIMMER
TRIMMER
0V
INPUT
LIFT LOW. S
LIFT
When the switch for the target function has been turned ON, turn the other OFF.
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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.
q q
e w
t r t
r q w
y
1. Remove the operation panel q from the machine. 1. Remove the operation panel q from the mounting
2. Insert the sensor II connector e into connector w in the bracket w.
operation panel. 2. Bend the protrusion e on the right side of the opera-
3. Using a mounting bracket r, screw the sensor II t onto tion panel.
the machine. 3. Insert the sensor II connector t into connector r in the
4. Install the operation panel q onto the machine. 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.
!2 !3 q e r y u o !1 !4
!7 w t i !0 !6 !5
q LED display Displays 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).
w Stitch number These keys are used to set the number of start and end backtack stitches (A, B, C and D),
setting keys 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.
e Start backtack key When this key is pressed, the number of start backtack stitches set for A and B (0 – 9) is
sewn.
r End backtack key When this key is pressed, the number of end backtack stitches set for C and D (0 – 9) is
sewn.
t Continuous When this key is pressed, the number of stitches set for A, B, C and D (0 – 9) will be sewn as
backtack key 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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No. Key name Function
y Fixed stitch 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.
u Name label key 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.
i Pleat presser When this key is pressed, the number of stitches for seam E (01 – 99) is sewn when the
sewing key 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.
o AUTO key 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.
!00 Thread trimming When this key is pressed, the thread is trimmed after sewing is completed.
key This key is only valid when the fixed stitch key y or name label key u has been pressed.
!1 Sewing speed 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
!2 Sewing speed sewing speed will be shown in the LED display q. You can then set the sewing speed by
indicator 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.
!3 Backtack indicator
!4 Slow start key 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.
!5 Correction key 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.
!6 Needle up/down The “ ” and “ ” indicators illuminate each time this key is pressed.
key 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).
!7 Half stitch key 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 φ 105
B737, (B201) B791, B774, B722, B724, B748A,
B798, B728, B772A, B778A, B781, B852, Low Thread Tack Stop
(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
1000 (5000) rpm 2000 (5500) rpm
B791-3 4500
B791-5 3500
B774-3 4500
B774-5 3500
B722-3 4700 2500 (6000) rpm 3000 (6500) rpm
B722-5 4000
B724-5 4000
B748-5 4000
B748-7 3000 3500 (7000) rpm 4000 (7500) rpm
B798 2000
B772 4700
B778 4700
B781 4000 4500 (8000) rpm 4700 (8500) rpm
B852 4500
B883 850
ovL 6000
8000
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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
1000 rpm 2000 rpm
B872 3000
B845 3000
B847 4000
B848 3000
2500 rpm 3000 rpm
B837 3000
B877 3000
B878 2500
P73/P81 2200
2400 3500 rpm 4000 rpm
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).
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.
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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.
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.
1) Turn on the power switch, and erase the [ABCD] display. (When using F-100, set to pattern 1).
2) While pressing the [ ] key, press the [ ] key. [ d S ] will appear at the [AB] display.
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 [ ] key. [ d S ] will reappear.
7) Using the [B+] key, set the [AB] display to [ E n ], and then press the [ ] key. The [ABCD] display will disappear, and 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 [ ] key, press the [ ] key. [ d S ] will appear at the [AB] display.
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 [ ] key. [ d S ] will reappear.
7) Using the [B+] key, set the [AB] display to [ E n ], and then press the [ ] key. The [ABCD] display will disappear, and the
setting will be completed.
1) Turn on the power switch, and erase the [ABCD] display. (When using F-100, set to pattern 1).
2) While pressing the [ ] key, press the [ ] key. [ d S ] will appear at the [AB] display.
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 [ ] key. The first display will be [ t 0 0 2 ]. (Default setting value.)
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 [ ] key. The [AB] display will return
to [ P A ]. ([ P A ])
8) Using the [B+] key, set the [AB] display to [ E n ], and then press the [ ] key. The [ABCD] display will disappear, and the
setting will be completed.
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12. Adjustments
12.1 Synchronizer Model DB2-B737 ·B748 ·B774 ·B791
0.5mm
w
Needle up stop
Higher
Lower
q
q Thin, regular materials: 10-12mm
Thick materials: 10-14mm
Reference
line
18-22mm
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.
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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”.
Power indicator
(2) The power indicator (green LED) is → Is the treadle pressed down?
illuminated. • The treadle must be returned to the
neutral position once after the
power is turned on before opera-
tion can be started.
→ Turn the machine pulley lightly by
hand. If it is heavy or does not ro-
tate, 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 (1) Check if the speed adjustment knob
high speeds. has been turned counterclockwise.
(2) The machine pulley does not turn → Remove the belt from the machine
easily. pulley and check the torque.
(3) The motor pulley is incorrect. → Check that the size of the motor
pulley being used matches the ma-
chine.
(4) The DIP switch settings are incor- → Check that the DIP switch settings
rect. 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.
3. The machine stops while sewing. Voltage drop → 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.)
Occurrence of various errors → Refer to “13.1 Error display and de-
tails”.
4. The machine does not stop in the Turn off the power switch, disconnect → Replace the synchronizer.
needle down or needle up position the synchronizer cord, and then turn
after the treadle is returned to the the power switch back on. If the sew-
neutral position. ing machine stops when the treadle is
at the neutral position, there is a prob-
lem with the synchronizer.
If the sewing machine does not stop, → Replace the control box.
there is a problem with the control
box.
Needle up position
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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.
8A fuse for solenoid blown Open the cover, and check the 8A fuse on the circuit
FU Transformer error board.
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13.2 Control box troubleshooting guide
Power PCB
PROBLEM CHECK PROBABLE CAUSE REMEDY
When power SW is ON, LED Fuse F101, F102 blown? Short circuit of the load on the Do not switch ON unless
(Red) does not illuminate. power circuit. Something wrong short circuit is solved.
with BD101? IPM? ZR? C101–C103,
C111–C113?
Power transformer?
Fuse F101, F102 OK? Has the R101 broken down? Replace the R101
Has the pattern blown? Replace power PCB
While running the motor OV CNR (40W/100ohm 40W/100ohm broken down? Replace 40W/100ohm
or OL error sign appears. broken down?) iGBT broken down? Replace fuse, iGBT
F201 (2A fuse) blown?
OL error? Pressed the pedal so hard? Educate how to press the
pedal
Motor does not run Malfunction by noise Is earth surely taken for the power Take earth
smoothly and an error sign coming from outside. supply?
PT appears, sometimes. Malfunction by static Is earth taken for the sewing head Take earth
electricity and box? Is earth good for motor
and box?
While running, PT appears. Operation of IPM Something wrong with IPM, PHU- Replace the power PCB
PHW
Motor does not run Wirewould resistance of Measure wirewould resistance. Replace motor
smoothly. motor. 2.6ohm between each phases?
Operation of PHU-PHZ
Operation of IPM Check IPM operation. Replace power PCB
Motor start up is not good Is power relay ON? Is the contact point of power relay Replace relay (RY).
and motor does not rise in open? When the power switch is The lead wire of relay is
its rotation. Or, the power Heating of the R101 ON, the contact point is closed. Is broken.
relay becomes OFF. resistor? R101 resistor broken? Replace R101
Treadle unit
Motor does not start when Is VC voltage right at Is there about 1.5V? Adjust by VR1
pressing the pedal pedal neutral position?
VC voltage when pedal is Is there about 4.5V? Adjust by VR2
pressed fully forward
VC voltage does not Something wrong with #1? Replace #1, HO.
change? HO?
Synchronizer
While running an error sign Remove synchronizer No encoder signal, needle-up Replace synchronizer
Lo appears. cord and check opera- signal, needle-down signal.
tion. Machine and motor
run
Remove synchronizer Motor is locked. Motor
cord and check opera-
tion. No running of Sewing head is locked. Adjust sewing head
machine and motor
Others Control PCB?
Motor does not run Remove synchronizer Something is wrong with the Replace synchronizer
smoothly. Motor rotate by cord and check encoder signals.
doing inching. It rotate smoothly
It does not rotate Motor is broken down or resis- Motor
smoothly. tance value abnormal
Others Control PCB
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Control PCB
When power is ON, an error 8A fuse blown? Check transistor for solenoid Replace fuse
sign FU appears.
8A fuse OK? Check power transformer
Something is wrong with Replace control PCB
the operation of sewing
head and motor.
Power transformer
When power SW is ON, LED Fuse F101, F102 blown? Check resistance value at the Replace transformer
(Red) does not illuminate. primary side of transformer.
Is there about 15ohm?
Check BD101. 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.
GND
∞Ω released
GND
7.4 Ω
Reverse solenoid
5.0 Ω 6.7 Ω
0Ω pressed
Presser foot
Thread wiper Thread trimming lift switch ∞Ω released
solenoid solenoid
(B737)
GND
8.0 Ω 6.7 Ω
GREEN/YELLOW
RED 2.6 Ω
2.6 Ω
BLACK 2.6 Ω
WHITE
W V
MOTOR
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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.
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Stroke – VC (analog voltage) 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.
(Note) Only this function can be used with the F-20 panel.
[ ] + Power switch ON
Initialization mode [i n ]
When [ ] is pressed, the display will change to the initialization mode menu.
[ A L ] will display first.
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.
Entire memory initialization
[A L]
[ ] of B Initialize by pressing [ ].
[ ] of B
Initialize by pressing [ ].
Initialize to parameters, etc., of head
Initialization of parameters and data set in head setting mode.
memory switches
[M P]
[ ] of B Initialize by pressing [ ].
Initialize to speed of head data set in
head setting mode.
Initialization of speed data
[S P]
[ ] of B
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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 recom-
mended.
A. Setting method
A-1. When SW1-5 is set to OFF (single needle)
[ ] + Power switch ON
[ ] of D [ ] of D [ ] of D
[7 3 7 3] [7 3 7 5] [7 3 7 1]
[ ] of B
[ ] of D [ ] of D
[7 9 1 3] [7 9 1 5]
[ ] of B
[ ] of D [ ] of D
[7 7 4 3] [7 7 4 5]
[ ] of B [ ]
[ ] of D [ ] of D
[ ] [ ]
[ ] of B
Stitching mode
[ ] + 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
the SW1-6, 7, 8 setting.
(Note 2) The settings will be registered when the [ ] 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.
(Note 1) These settings cannot be made with F (X)-20. Use F (X)-40 or F (X)-100.
Power switch ON
(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.
Stitching mode
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.>
[ ] [ ] of A
[ ] of B End code [E n]
[ ] [ ] of B
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(Continued from previous page)
Stitching mode
[ ]+[ ]
Setting mode menu 1
[ ]+[ ] 〈〈Stitching speed setting mode〉〉
Thread trimming
[t r] [ 2 1 5]
[ ] of B speed
Change with [ ] and
[ ] keys
[ ] of B [ ]
Stop improve- [P o] [1 5 0 0]
ment speed
Change with [ ] and
[ ] of B [ ] keys
End code [E n]
[ ] of B
End the setting mode menu 2 when the [ ] key is pressed, and
return to the setting mode menu 1.
END code
[E n]
[ ] of B
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15.4 Stitching speed setting mode
Each speed can be changed as described below by using the stitching speed setting mode.
(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 φ 105 pulley, single needle are designated), the speed can be set to
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 ] )
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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 smooth-
ing 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, opera-
tion in the manner of a clutch motor will take place. As performance as a servomotor is not attained, this is not recom-
mended unless the synchronizer is faulty.
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17. Memory switch list
* The shaded fields indicate the default values.
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Display No. SW Item & Contents
26 OFF
Slow down to low speed on starting of end tacking
After end tacking goes into acceleration
ON Continuous tacking A, B [stitches] × D [Number of time]
27 OFF Continuous tacking A, B, C, D
ON No. of continuous tacking stitches + 10 stitches
28 OFF Normally
Enable to stop during start tacking, speed is variable with treadle. (start tacking speed at
ON
31 OFF
maximum treadle repression)
Not enable to stop during start tacking, speed is keep speed by treadle. (start tacking speed)
F-20, 40 No. of tacking stitches change enabled
ON
* Tacking stitches are ABCD set No.
32 OFF
F-20, 40 No. of tacking stitches change disabled.
* No. of stitches is fixed with 4, when switch F-20 [ ], F-40 [ ] ON.
* No. of AB tacking stitches are sewn when switch F-40 of [ ] [ ] ON.
ON Call fixed stitches when pleats sewing will be used.
33 OFF No call fixed stitches when pleats sewing will be used.
ON No LED call when continuous tacking [ ] is canceled
LED call when continuous tacking [ ] is canceled.
34 OFF Set [
When [
], [ ], [ ], [
] switch is OFF.
], [ ] is call back.
37 OFF
37
OFF
38
OFF
ON
2.5ms 2.5ms
OFF Transistor controlling
Upper and lower transistor
ON OFF 1ms 1ms ON/OFF at a same time
ON
OFF ON 1ms 5ms Upper transistor keep ON,
38 OFF
ON ON 1ms 1ms lower transistor ON/OFF.
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Display No. SW Item & Contents
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Display No. SW Item & Contents
64 OFF
* When memory switch [61] is ON
When needle is raised and stop with [ ] key and actuator switch, needle stops at needle
UP position
ON (Not used)
65 OFF * Normally OFF
When reverse needle UP operation is enabled, presser turns ON before needle UP.
ON
66 OFF
* When memory switch [62] is set to OFF, presser turns ON after thread wiping
When reverse needle UP operation is enabled, presser turns ON after needle UP
ON (Not used)
67 OFF * Normally OFF
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
ON tacking will be same.
68 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
OFF
changed over
ON Output during running (needle cooler, etc.)
71 OFF * Normally OFF
ON Thread release output (3 position)
72 OFF * Normally OFF
ON Air (ON while the No. of stitches (parameter [C1]) & after fabric edge sensor turns ON.)
73 OFF Normally OFF
ON Condense output (ON while stitching [A] when B = 0, ON while stitching [D] when C = 0 )
74 OFF * Normally OFF
ON Program output 1 (ON after thread trimming, after T0 (parameter [C2]), during T1(parameter [C3]))
75 OFF Normally OFF
ON Program output 2 (ON during presser synchronization, after T2 (parameter [C4]) during T3 (parameter [C5]))
76 OFF * Normally OFF
ON (Not used)
77 OFF * Normally OFF
ON (Not used)
78 OFF * Normally OFF
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.
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Display No. SW Item & Contents
ON (Not used)
81 OFF Normally OFF
ON (Not used)
82 OFF Normally OFF
Presser foot rise by treadle is always active.
ON
* Only when SW1-1 is set to OFF
83 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
ON * Inching speed can be set to slower than thread trimming speed to facilitate 1 stitch
84 OFF
sewing.
Inching speed ≥ Thread trimming speed
Speed of end tacking = Speed of start tacklng
ON
85 OFF
* Setting speed of end tacking to same as start tacking
Speed of end tacking = Speed of end tacking
ON Servo lock timer OFF operation disabled
86 OFF Servo lock timer OFF operation enabled
Brake force increases with presser UP/DOWN signal
ON
* When memory switch [88] is set to ON
87 OFF
Brake force does not increase with presser UP/DOWN signal
* When memory switch [88] is set to ON
ON Servo lock enabled
88 OFF Servo lock disabled
ON (Not used)
91 OFF Normally OFF
ON (Not used)
92 OFF Normally OFF
Treadle operation valid after standing work (during simultaneous operation, standing work
ON
93 OFF
has priority)
Treadle operation invalid after standing work
ON (Not used)
94 OFF Normally OFF
ON (Not used)
95 OFF Normally OFF
ON (Not used)
96 OFF Normally OFF
ON (Not used)
97 OFF Normally OFF
ON (Not used)
98 OFF Normally OFF
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18. Parameter list
(Note) The default data is the value set in B737 with the machine head setting.
Data setting
Display No. Initial data Detailes
range
02 00 to 90 (×10)
t0 (20ms) (0 to 990ms)
Thread wiper ON delay time
05 00 to 90 (×10)
t1 (50ms) (0 to 990ms)
Thread wiper ON time
05 00 to 90 (×10)
t2 (50ms) (0 to 990ms)
Wiper OFF to presser lifting ON delay time
30 00 to 90 (×10)
F0 (300ms) (0 to 990ms)
Presser lifter full-ON time
F5 00 00 to 99 (not used)
F6 00 00 to 99 (not used)
F8 07 01 to 99 (not used)
F9 07 01 to 99 (not used)
FA 10 01 to 99 (not used)
b0 24
(pulse)
00 to 47
(pulse)
(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
24 00 to 47
b1 (pulse) (pulse)
(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
24 00 to 47
b2 (pulse) (pulse)
(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
b3 24
(pulse)
00 to 47
(pulse)
(The larger the value is, the larger the timing delays.)
(The smaller the value is, the faster the timing becomes.)
* When memory switch [22], [26] is set to ON
b4 10
(100ms)
05 to 50 (×10)
(50 to 500ms)
Stop time during reverse change timing
* When memory switch [68] is set to ON
Temporary stop position during reverse change timing
11 00 to 23
b5 (pulse) (pulse)
(Number of pulses from needle UP signal)
* When memory switch [68] is set to ON
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Data setting
Display No. Initial data Detailes
range
C8 00 00 to 99 (not used)
C9 00 00 to 99 (not used)
CA 00 01 to 99 (not used)
Cb 00 00 to 99 (not used)
CC 00 00 to 99 (not used)
Cd 00 00 to 99 (not used)
CE 00 00 to 99 (not used)
CF 10 00 to 99 (not used)
d2 00 00 to 24 (not used)
d3 00 00 to 99 (not used)
H0 66 40 to 70 (not used)
H2 00 00 to 99 (not used)
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Data setting
Display No. Initial data Detailes
range
P2 DOM. None
EXP. 1.9V
00 to 04 (When the numerical value is large, the stroke to presser foot
lowering is long)
Treadle stroke, inching start point
02 (When the numerical value is small, the stroke to the motor start
P3 DOM. 2.0V
EXP. 1.9V
00 to 04 is short)
(When the numerical value is large, the stroke to the motor start
is large)
Treadle stroke, variable speed range start point
02 (When the numerical value is small, the variable speed area will
P4 DOM. 2.6V
EXP. 3.0V
00 to 04 increase)
(When the numerical value is large, the inching speed area will
increase)
Treadle stroke, high speed reach point
(When the numerical value is small, the stroke to the high speed
02
P5 (4.2V)
00 to 04 area is short)
(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
S0 02 00 to 04
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
S1 02 00 to 04 area is short)
(When the numerical value is large, the variable speed area will
increase)
M0 07 04 to 50 (don’t change)
M1 15 05 to 30 (don’t change)
M2 10 05 to 30 (don’t change)
M3 10 00 to 70 (don’t change)
M4 10 01 to 23 (don’t change)
M5 10 00 to 70 (don’t change)
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Data setting
Display No. Initial data Detailes
range
10 07 to 50 (×10) Starting time (When the numerical value is small, the motor will
M6 (100ms) (70 to 500ms) start up faster)
10 07 to 50 (×10) Stopping time (When the numerical value is small, the motor will
M7 (100ms) (70 to 500ms) stop faster)
M8 15 01 to 40 (don’t change)
M9 20 01 to 20 (don’t change)
MA 07 01 to 20 (don’t change)
Mb 15 01 to 20 (don’t change)
MC 07 01 to 20 (don’t change)
Md 28 04 to 70 (don’t change)
ME 14 04 to 70 (don’t change)
MF 20 04 to 70 (don’t change)
MG 10 01 to 20 (don’t change)
MH 24 04 to 70 (don’t change)
Mi 50 10 to 99 (don’t change)
MJ 40 05 to 70 (don’t change)
ML 15 00 to 50 (don’t change)
MM 05 00 to 70 (don’t change)
Mn 05 01 to 30 (don’t change)
Mo 15 01 to 30 (don’t change)
MP 20 01 to 99 (don’t change)
MQ 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.
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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.
e r
u. In the same manner, loosen the screws on the opposite i. Slide the control box to the right.
side by about half. (Two places)
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54
J03766001
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MD-602, 612
NAME CONTROL PCB ASSY, MD602
CODE J80900001
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MD-602, 612
NAME CONTROL PCB circuit (1/3)
NOTE MD602/612
55
56
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MD-602, 612
NAME CONTROL PCB circuit (2/3)
NOTE MD602/612
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MD-602, 612
NAME CONTROL PCB circuit (3/3)
NOTE MD602/612
57
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MD-602, 612
NAME TREADLE PCB assy (B47A127)
CODE J80875001
69
BROTHER INDUSTRIES, LTD. NAGOYA, JAPAN
Printed in Japan J90113-001
2001. 06.
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