Please read this manual before making any adjustments.
SINGLE NEEDLE DIRECT DRIVE STRAIGHT LOCK STITCHER
WITH THREAD TRIMMER
Page 2
This service manual is intended for S-7200C; be sure to read the S-7200C instruction manual before
this manual.
Carefully read the “SAFETY INSTRUCTIONS” and the whole of this manual to understand this product
before you start maintenance.
As a result of research and improvements regarding this product, some details of this manual may not
be the same as those for the product you purchased.
If you have any questions regarding this product, please contact a Brother dealer.
S-7200C
Page 3
SAFETY INSTRUCTIONS
[1] Safety indications and their meanings
This service manual and the indications and symbols that are used on the machine itself are provided in order to ensure safe
operation of this machine and to prevent accidents and injury to yourself or other people.
The meanings of these indications and symbols are given below.
Indications
DANGER
CAUTION
Symbols
· · · · ·
· · · · ·
· · · · ·
The instructions which follow this term indicate situations where failure to follow the
instructions will result in death or serious injury.
The instructions which follow this term indicate situations where failure to follow the
instructions could cause injury when using the machine or physical damage to
equipment and surroundings.
This symbol ( ) indicates something that you should be careful of. The picture inside the triangle
indicates the nature of the caution that must be taken.
(For example, the symbol at left means “beware of injury”.)
This symbol ( ) indicates something that you must not do.
This symbol ( ) indicates something that you must do. The picture inside the circle indicates the
nature of the thing that must be done.
(For example, the symbol at left means “you must make the ground connection”.)
S-7200C
i
Page 4
[2] Notes on safety
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the cover of the control box. Touching areas where high voltages are present can result in severe
injury.
DANGER
CAUTION
Environmental requirements
Use the sewing machine in an area which is free
from sources of strong electrical noise such as
electrical line noise or static electric noise.
Sources of strong electrical noise may cause
problems with correct operation.
Any fluctuations in the power supply voltage
should be within ±10% of the rated voltage for the
machine.
Voltage fluctuations which are greater than this
may cause problems with correct operation.
The power supply capacity should be greater than
the requirements for the sewing machine's power
consumption.
Insufficient power supply capacity may cause
problems with correct operation.
Machine installation should only be carried out by
a qualified technician.
Contact your Brother dealer or a qualified
electrician for any electrical work that may need to
be done.
The sewing machine weighs more than 45 kg. The
installation should be carried out by two or more
people.
Do not connect the power cord until installation is
complete. The machine may operate if the treadle
is depressed by mistake, which could result in
injury.
Turn off the power switch before inserting or
removing the plug, otherwise damage to the
control box could result.
Be sure to connect the ground. If the ground
connection is not secure, you run a high risk of
receiving a serious electric shock, and problems
with correct operation may also occur.
When securing the cords, do not bend the cords
excessively or fasten them too hard with staples,
otherwise there is the danger that fire or electric
shocks could occur.
The ambient temperature should be within the
range of 5°C to 35°C during use.
Temperatures which are lower or higher than this
may cause problems with correct operation.
The relative humidity should be within the range of
45% to 85% during use, and no dew formation
should occur in any devices.
Excessively dry or humid environments and dew
formation may cause problems with correct
operation.
In the event of an electrical storm, turn off the power
and disconnect the power cord from the wall outlet.
Lightning may cause problems with correct
operation.
Installation
If using a work table which has casters, the casters
should be secured in such a way so that they
cannot move.
Secure the table so that it will not move when tilting
back the machine head. If the table moves, it may
crush your feet or cause other injuries.
Use both hands to hold the machine head when
tilting it back or returning it to its original position. If
only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
Be sure to wear protective goggles and gloves
when handling the lubricating oil and grease, so that
they do not get into your eyes or onto your skin,
otherwise inflammation can result.
Furthermore, do not drink the oil or eat the grease
under any circumstances, as they can cause
vomiting and diarrhea.
Keep the oil out of the reach of children.
ii
S-7200C
Page 5
CAUTION
Sewing
This sewing machine should only be used by
operators who have received the necessary training
in safe use beforehand.
The sewing machine should not be used for any
applications other than sewing.
Be sure to wear protective goggles when using the
machine.
If goggles are not worn, there is the danger that if a
needle breaks, parts of the broken needle may
enter your eyes and injury may result.
Turn off the power switch at the following times.
The machine may operate if the treadle is
depressed by mistake, which could result in injury.
・ When threading the needle
・ When replacing the bobbin and needle
・ When not using the machine and when leaving
the machine unattended
If using a work table which has casters, the casters
should be secured in such a way so that they
cannot move.
Turn off the power switch before carrying out
cleaning. The machine may operate if the treadle is
depressed by mistake, which could result in injury.
Secure the table so that it will not move when tilting
back the machine head. If the table moves, it may
crush your feet or cause other injuries.
Use both hands to hold the machine head when
tilting it back or returning it to its original position. If
only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
Attach all safety devices before using the sewing
machine. If the machine is used without these
devices attached, injury may result.
Do not touch any of the moving parts or press any
objects against the machine while sewing, as this
may result in personal injury or damage to the
machine.
Secure the table so that it will not move when tilting
back the machine head. If the table moves, it may
crush your feet or cause other injuries.
Use both hands to hold the machine head when
tilting it back or returning it to its original position. If
only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
If an error occurs in machine operation, or if
abnormal noises or smells are noticed, immediately
turn off the power switch. Then contact your nearest
Brother dealer or a qualified technician.
If the machine develops a problem, contact your
nearest Brother dealer or a qualified technician.
Cleaning
Be sure to wear protective goggles and gloves
when handling the lubricating oil and grease, so that
they do not get into your eyes or onto your skin,
otherwise inflammation can result.
Furthermore, do not drink the oil or eat the grease
under any circumstances, as they can cause
vomiting and diarrhea.
Keep the oil out of the reach of children.
Use only the proper replacement parts as specified
by Brother.
Maintenance and inspection
Disassembly, assembly, maintenance and
inspection of the sewing machine should only be
carried out by a qualified technician.
Ask your Brother dealer or a qualified electrician to
carry out any maintenance and inspection of the
electrical system.
Turn off the power switch and disconnect the power
cord from the wall outlet at the following times,
otherwise the machine may operate if the treadle is
depressed by mistake, which could result in injury.
・ When carrying out inspection, adjustment and
maintenance
・ When replacing consumable parts such as the
rotary hook
If the power switch needs to be left on when
carrying out some adjustment, be extremely careful
to observe all safety precautions.
Turn off the power switch before inserting or
removing the plug, otherwise damage to the control
box could result.
S-7200C
Secure the table so that it will not move when tilting
back the machine head. If the table moves, it may
crush your feet or cause other injuries.
Use both hands to hold the machine head when
tilting it back or returning it to its original position.
If only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
Use only the proper replacement parts as specified
by Brother.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
Any problems in machine operation which result
from unauthorized modifications to the machine will
not be covered by the warranty.
iii
Page 6
[3] Warning labels
The following warning labels appear on the sewing machine.
Please follow the instructions on the labels at all times when using the machine. If the labels have been removed or are
difficult to read, please contact your nearest Brother dealer.
1
2
3
Touching areas where high voltages are present can
result in severe injury. Turn off the power before
opening the cover.
4
5
Be careful not to get your hands
caught when returning the
machine head to its original
position after it has been tilted.
Be careful to avoid injury from
the moving thread take-up.
* Safety devices: (A) Finger guard
Oil pan
(B) Thread take-up cover
Control box
6
Transformer box
(100 V/400 V system only)
Be sure to connect the ground. If
the ground connection is not
secure, you run a high risk of
receiving a serious electric
shock, and problems with correct
operation may also occur.
7
Direction of operation
4123M
iv
S-7200C
Page 7
S-7200C
Page 8
CONTENTS
1. MACHINE SPECIFICATIONS.............. 1
2. NOTES ON HANDLING........................
2
3. COMPARISON OF FUNCTIONS
(G50 AND G10 OPERATION PANELS)...
3
4. FUNCTION SETTINGS
(G50 OPERATION PANEL)..................
4-1.
List of advanced functions ................................... 4
4-2.
List of special functions when power is turned on.. 5
4-3. Maximum sewing speed and start backtack sewing speed
setting methods
If the LOCK key icon (1) is on, release the lock before carrying out the following
operations.
1
Maximum sewing speed setting
Maximum sewing speed
Start backtack sewing speed
2
Example:
4,500 sti/min
The main display (2) will change from an orange display to a
green display.
・ The maximum sewing speed can be set to a speed from
220 sti/min to the maximum sewing speed that has been
set for the head detector unit.
・ If all numbers in the sewing speed control display (3) are
illuminated, sewing will be carried out at the maximum
speed that is set here when the treadle is fully depressed.
2001B
2002B
2003B 2004B
Start backtack sewing speed setting
3
4
NOTE:
If the main display (2) appears in green, normal key operations cannot be carried out. If this happens, press the MAX key
once more to clear the sewing speed display and return to the orange display. Normal key operations can then be carried
out.
Example:
1,600 sti/min
・ The start backtack sewing speed can be set to a speed
from 220 sti/min to 3,000 sti/min.
(The factory default setting is 1,800 sti/min.)
The sewing speed display disappears and the main display (2)
returns to the orange display.
2005B
2159M
S-7200C
6
Page 16
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
4-4. Using the LOCK key
2006B
Control box
4221M
When the power switch is turned on, the LOCK key (1) turns on. (The icon (2) is illuminated.)
This causes all key operations which have been set using the protect settings feature to become disabled, and you can use this
feature to prevent setting values from being changed by accident.
* For details on the protect settings feature, refer to “4-11. Protecting settings”.
<Releasing the lock>
Press down the LOCK key (1) for 2 seconds or more. The icon (2) will switch off and the lock will be released.
NOTE:
* If DIP switch 1 is set to ON, the lock cannot be released.
* The lock cannot be released if the protection level has been set to “2” or “3” using the protect settings feature.
* At the time of shipment from the factory, the protection level is set to “1”.
<Setting the lock>
When the icon (2) is switched off, press down the LOCK key (1) for 2 seconds or more.
The icon (2) will illuminate and operations for keys which have been set using protect setting mode will be disabled.
* About the icon (2)
If the protection level has been set to “0” using the protect settings feature, the status of the icon (2) will be stored when the
lock settings have been changed.
7
S-7200C
Page 17
*
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
4-5. Memory switch setting method (Standard)
NOTE:
・ This cannot be set if DIP switch 1 has been set to ON, so set it to OFF.
・ If the LOCK key icon (1) is on, release the lock before carrying out the following
operations.
・
If the MAX key icon (2) is on, press the MAX key to return the main display to stitch
2007B
Change to memory switch mode
1
number display (orange).
The memory switch number (A) and the setting
details (B) for that number will be displayed in
green in the main display (3).
NOTE:
If the current setting value is different from
the initial value, it will be displayed in
yellow.
Select a memory switch number (A)
2
Change the setting details (B).
3
* If you press the or key (4) at this time, only the memory switch
numbers with a current value that is different from the initial value will
be displayed in yellow.
* If you would like to return the setting which is currently being displayed
to the default value, press the
If the setting details for the memory switch are different from the
original setting details, the setting details (B) will flash.
* If the setting details for the memory switch are different from the initial
values, they will be displayed in yellow.
key.
2009B 2093B 2138M 2139M
2008B
4
Repeat steps 2 to 4 above to change other memory switch settings.
5
The setting for the memory switch will be stored and (B) will stop
flashing and illuminate steadily.
NOTE:
The changed settings will be enabled after memory switch mode
has been exited.
2011B 4173M
4192M
6
Normal sewing machine operation will then be possible.
S-7200C
4193M
8
Page 18
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
Presser foot lifter operation and pedal operation settings (001-)
No.
001 ON/OFF OFF -
002 ON/OFF OFF -
003 ON/OFF ON -
004 ON/OFF ON -
010 ON/OFF OFF -
011 0-2 0 1
012
013 ON/OFF ON -
014 ON/OFF ON -
015 ON/OFF ON -
Setting
range
0-500
(ms)
Initial
value
80
(ms)
Setting
units
10
(ms)
Setting details
Presser foot status when treadle is returned to neutral after thread trimming
ON: Presser foot does not drop
OFF: Presser foot drops (Presser foot will not drop if No. 851 is set to OFF.)
Presser foot status after treadle stops at neutral
ON: Presser foot lifts
OFF: Presser foot does not lift
Presser foot lifting when treadle is depressed backward to 1st step after
returning to neutral
* If No. 004 is “OFF”, this function will operate as if the setting is “OFF”.
ON: Possible
OFF: Not possible
Operation when treadle is depressed backward
ON: Thread trimming and end backtack sewing operations are enabled
(If thread trimming operation has been disabled, needle up operations
will be carried out without thread trimming.)
OFF: Thread trimming and end backtack sewing operations are disabled
(Presser foot is raised when treadle is depressed backward.)
Alternate standing operation pedal and treadle operation
ON: Standing operation pedal and the treadle can operate alternately
(If the standing operation pedal and the treadle are operated at the same
time, the standing operation pedal will have priority.)
OFF: Treadle operation can also be used after standing operation pedal is used
Operation when standing operation variable speed pedal is on
0: Sewing speed corresponds to treadle depression amount
1: Sewing speed corresponds to sewing speed control key setting
(constant speed)
2: Sewing speed corresponds to end backtack speed
Delay time from standing pedal turning on until motor starts operating
Pause function during standing operation when presser foot lifter pedal is
operated (when AUTO key is set to ON)
ON: Operation pauses during sewing when presser foot lifter pedal is ON
OFF: No operation
Pause function during standing operation when high-speed pedal is operated
(when AUTO key is set to ON)
ON: Operation pauses during sewing when high-speed pedal turns ON once
more. Sewing is resumed when high-speed pedal next turns OFF.
OFF: No operation
Presser foot lifting operation from thread trimming pedal after thread is
trimmed during standing operation
ON: Presser foot can be lifted and lowered
(If No. 051 is “OFF”, the thread trimming pedal operation is disabled after
the presser foot lifter pedal has been operated during standing
operation.)
OFF: No operation (Only possible by using presser foot lifter pedal.)
9
S-7200C
Page 19
Sewing machine motor settings (100-)
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
No.
100
101 OFF/1-3 OFF 1
102 1-5 1 1
Setting
range
1-99
(needles)
Initial
value
2
(needles)
Setting
units
1 Number of slow start stitches
Operation panel settings (300-)
No.
300 1-3 1 1
301
302 0-2 1 1
303
Setting
range
0-100
(needles)
0-1000
(needles)
Initial
value
10
(needles)
100
(needles)
Setting
units
1
10
Setting details
Pedal response switching settings immediately after sewing has started
OFF: No switching
1: Slow start only when sewing starts after thread trimming
2: Slow start only when sewing starts after sewing has been paused
3: Slow start always when sewing starts
Pedal response immediately after sewing has started
* The larger the value, the slower the speed when sewing starts.
* If No. 101 is set to “OFF”, this setting is disabled.
Setting details
Lower thread counter display operations
1: Lower thread counter (Counting units are set by No. 301.)
2: Thread trimming counter (incremented by 1 each time of a thread trimming
operation occurs)
* The counter is incremented even if thread trimming is set to disabled.
3: Needle replacement counter (Counting units are set by No. 303.)
Lower thread counter counting units
0: No counting operation
1-100: Display counts down by the set number of stitches
Operation for counter warning (when < ! > warning icon is displayed)
0: Starting using the treadle is always enabled
1: After thread trimming stops, starting using the treadle is disabled
(enabled until depressed backward)
2: Operation using treadle fully disabled after treadle is returned to neutral
position and sewing stops
Needle replacement counter counting units
0: No counting operation
10-1000: Display counts down by the set number of stitches
S-7200C
10
Page 20
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
Sewing program settings (400-)
No.
400 2-6 2 1
401 2-6 2 1
402 1-2 1 1
403 ON/OFF OFF -
404 ON/OFF OFF -
405 1-2 1 1
Setting
range
Initial
value
Setting
units
Setting details
Start backtack sewing pattern
* If A=0, there is no A operation, and if B=0, there is no B operation.
2: A-B
3: B-A-B
4: A-B-A-B
5: B-A-B-A-B
6: A-B-A-B-A-B
End backtack sewing pattern
* If C=0, there is no C operation, and if D=0, there is no D operation.
2: C-D
3: C-D-C
4: C-D-C-D
5: C-D-C-D-C
6: C-D-C-D-C-D
Continuous backtack sewing pattern
1: A-B-C-D
* If A=0, there is no A operation, and if B=0, there is no B operation.
If C=0, there is no C operation, and if D=0, there is no D operation.
2: A-B × D times
* If A=0, there is no A operation, and if B=0, there is no B operation.
If A≠0, B≠0 and D=4, operation is in the order A-B-A-B.
Stopping while start backtacking is in progress, and speed during start
backtacking
ON: When the treadle is returned to the neutral position, start backtacking can be
stopped before it is finished, and the speed during start backtacking
becomes the speed corresponding to the treadle depression amount.
(low speed-start backtacking speed)
OFF: When the treadle is returned to the neutral position, start backtacking ends,
sewing stops and the sewing speed becomes the start backtacking speed.
Feed direction when sewing is stopped immediately after start
backtacking is complete
ON: Quick reverse solenoid turns OFF after sewing stops
* If No. 403 is “OFF”, operation occurs when the treadle is
depressed slightly.
OFF: Quick reverse solenoid turns OFF and feed returns to
normal direction, then stops
* If No. 452 is “ON”, the operation set by this setting is
disabled.
Operation when pleat presser sewing key is ON (fixed stitch sewing load
function)
1: Reverse stitching operation when actuator switch is ON
2: Fixed stitch sewing operation when actuator switch is ON
11
S-7200C
Page 21
Standard device settings (500-)
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
No.
500 OFF/1-3 1 1
501 OFF/1-2 1 1
502 OFF/1 1 1
(*1) When the pleat presser sewing key is ON, the pleat presser sewing switch function is enabled.
(*2) When the pleat presser sewing key is set to ON, the correction sewing switch function is disabled.
(*3) To make it function as a thread trimming switch while sewing is in progress, No. 501 must be set to “2”.
(*4) To make it function as a quick reverse switch while sewing is in progress, No. 501 must be set to “1”.
Setting
range
However, when set to “2”, the thread trimming switch function takes priority.
Initial
value
Setting
units
Setting details
Actuator switch function when sewing is stopped (*1)
OFF: No operation
1: Correction sewing switch (*2)
2: Thread trimming switch (*3)
3: Cloth feed quick reverse switch (*4)
Actuator switch function during sewing (*1)
OFF: No operation
1: Manual backtack switch (*2)
2: Thread trimming switch (*2)
Presser foot lifter switch function
OFF: No operation
1: Presser foot lifter switch
S-7200C
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Page 22
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
*
*
4-6. Memory switch setting method (Advanced)
Change to memory switch mode
1
(While holding down the MAX key and the FUNC (function) key,
press the power ON switch.)
Select a memory switch number (A)
2
If you press the or key (2) at this time, only the memory switch
numbers with a current value that is different from the initial value will
be displayed in yellow.
The memory switch number (A) and the
setting details (B) for that number will be
displayed in green in the main display (1).
2012B
Change the setting details (B)
3
* If you would like to return the setting which is currently being displayed
to the default value, press the
If the setting details for the memory switch are different from the
original setting details, the setting details (B) will flash.
* If the setting details for the memory switch are different from the initial
values, they will be displayed in yellow.
4
Repeat steps 2 to 4 above to change other memory switch settings.
5
The setting for the memory switch will be stored and (B) will stop
flashing and illuminate steadily.
NOTE:
The changed settings will be enabled after memory switch mode
has been exited.
2009B 2013B 2138M 2139M
key.
2011B 4173M
4192M
6
Normal sewing machine operation will then be possible.
13
S-7200C
4193M
Page 23
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
Presser foot lifter and presser foot lifter pedal settings (050-)
No.
050 ON/OFF ON -
051 ON/OFF (*1) -
055 ON/OFF OFF -
057 ON/OFF (*1) -
(*1) The initial value varies depending on the destination. For Europe and the Americas, the initial setting is “ON”, and for all
Setting
range
other destinations, it is “OFF”.
Initial
value
Setting
units
Setting details
Forward treadle operation interlock during thread trimming
ON: Depressing treadle forward during thread trimming is disabled
(After the treadle is returned to the neutral position, depressing it
forward is enabled.)
OFF: Depressing treadle forward during thread trimming is enabled
Operation after knee switch is used to raise and lower presser foot
ON: Presser foot can be raised and lowered by depressing the treadle
backward
OFF: Above operation is not possible
Backward treadle operation when presser foot is lifted, or operation after
knee switch is operated
* This setting is only enabled when No. 851 is “ON” and No. 001 is “ON”.
ON: Presser foot does not lift when treadle is returned to neutral position
OFF: Presser foot lifts when treadle is returned to neutral position
Presser foot dropping when treadle is depressed forward to 1st step
* This is disabled when No. 852 is set to “OFF”.
ON: Presser foot is lowered
OFF: Presser foot is not lowered
S-7200C
14
Page 24
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
No.
Setting
range
080 -7-7 0 1 Treadle backward on (thread trimming) point (S7)
081 -5-5 0 1 Treadle backward 1st step on (presser foot lifting) point (S6)
082 -5-5 0 1 Treadle forward 1st step on (presser foot dropping) point (S1)
083 -5-5 0 1 Treadle forward on (starting) point (S2)
084 -5-7 0 1 Treadle variable speed range starting point (S3)
085 -7-7 0 1 Treadle high speed range reaching point (S4)
086 -2-2 0 1
087 -2-2 0 1 High speed range reaching point for standing operation variable speed pedal (S4)
088 0-3 (*2) 1
(*2) The initial value varies depending on the destination. For Japan, the initial value is “1”, and for all other destinations, it is “0”.
Initial
value
Setting
units
Setting details
Variable speed range starting point for standing operation variable speed
pedal (S3)
172 -3-6 0 1 Gain during high-speed motor operation
173 -3-6 0 1 Gain during low-speed motor operation
174 -3-6 0 1 Weak gain during thread trimming
175 OFF/1 OFF 1
176
177
Setting
range
10-500
(ms)
-20-20
(degrees) 0 (degrees)
5-12
(A)
5-12
(A)
OFF/
1-120
(seconds)
30-89
(degrees)
Initial
value
150
(ms)
11
(A)
10
(A)
OFF 1
45
(degrees)
Setting
units
10
(ms)
1
1
1
1
Setting details
Slow stop control when treadle is returned to neutral
ON: Slow stop control without step operation
(Low speed operating time before sewing stops is almost constant)
OFF: Above control is not used
(Low speed operating time before sewing stops is not constant)
Effective hammer operation if needle does not pierce
ON: Effective hammer operation
OFF: No effective hammer operation
Highest needle position stop operation
ON: Used
OFF: Not used
Delay time until reverse operation starts during highest needle position stop
operation
* This is only enabled when No. 152 is set to “ON”.
Quick reverse needle up stop position setting
* This is only enabled when No. 152 is set to “ON”.
Thread wiping operation and presser foot lifting operation during highest
needle position stop operation
* This is only enabled when No. 152 is set to “ON”.
0: The needle is raised, then thread wiping is carried out, and then the
presser foot is lifted
Current limit value during acceleration
* The larger the value, the faster the sewing machine motor acceleration;
the smaller the value, the slower the acceleration. (Setting a small value
may be effective in preventing fluorescent light flickering.)
Current limit value during deceleration
* The larger the value, the faster the sewing machine motor deceleration;
the smaller the value, the slower the deceleration.
Servo lock operation
OFF: None
1: Servo lock operation occurs when sewing is stopped
Servo lock timer setting
* This is disabled when No. 175 is set to “OFF”.
OFF: No timer operation
1-120: Timer operates (1-120 seconds)
Servo lock release rotation angle [Do not change this setting.]
* This is disabled when No. 175 is set to “OFF”.
Becomes lower
Becomes higher
[Do not change this setting.]
[Do not change this setting.]
[Do not change this setting.]
2248M
S-7200C
16
Page 26
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
No.
180
181
182
183
184
186
188
189
(*1) The actual upper limit for the operating speed will be the speed set by No. 181.
(*2) The actual lower limit for the operating speed will be the speed set by No. 181.
(*3) The upper limit set will vary depending on the machine head specifications. In addition, the initial value will vary
Setting
range
150-300
(sti/min)
150-300
(sti/min)
500-2500
(sti/min)
150-1000
(sti/min)
150-3000
(sti/min)
150-3000
(sti/min)
150-HIL
(sti/min)
150-
(*3)
(sti/min)
depending on the destination.
No. Machine head specifications Destination Initial valueSet upper limit
Dry specifications: -[]5[]
188
Lightweight difficult-to-sew
material specifications: -[][]S
Medium-weight material
specifications: -[]03, -[]33
Heavy-weight material
Specifications: -[]05, -[]35
Dry specifications: -[]5[]
189
Lightweight difficult-to-sew
material specifications: -[][]S
Medium-weight material
specifications: -[]03, -[]33
Heavy-weight material
specifications: -[]05, -[]35
Initial
value
220
(sti/min)
220
(sti/min)
1400
(sti/min)
700
(sti/min)
3,000
(sti/min)
1800
(sti/min)
HIL
(sti/min)
(*3)
(sti/min)
Setting
units
10 Thread trimming speed (TRIM) (*1)
10 Inching speed (INCH)
100 Stop improvement speed (POS) [Do not change this setting.]
10 Slow speed (SLOW) (*2)
100 Upper limit for start backtack speed setting (SBL) (*2)
100 End backtacking speed (EBT) (*2)
100 Automatic speed (AUTO) (*2), (*3)
100 Maximum sewing speed limit speed (HIL) (*3)
All 4000 sti/min4000 sti/min
Japan 4000 sti/min
China 4300 sti/min
Europe, Americas 4700 sti/min
General export 4000 sti/min
Japan 4000 sti/min
China 4300 sti/min
Europe, Americas 4500 sti/min
General export 4000 sti/min
All 4000 sti/min4000 sti/min
Japan 4300 sti/min
China 4300 sti/min
Europe, Americas 4700 sti/min
General export 4000 sti/min
Japan 4300 sti/min
China 4300 sti/min
Europe, Americas 4500 sti/min
General export 4000 sti/min
Setting details
-[]03:5000 sti/min
-[]33:5000 sti/min
-[]05:4500 sti/min
-[]35:4500 sti/min
-[]03:5000 sti/min
-[]33:5000 sti/min
-[]05:4500 sti/min
-[]35:4500 sti/min
17
S-7200C
Page 27
Panel operation settings (350-)
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
No.
350 ON/OFF ON -
351
352 ON/OFF ON -
353 ON/OFF ON -
354 0-2 1 1
Setting
range
0-10
(seconds) 0 (seconds)
Initial
value
Setting
units
1
Setting details
Buzzer (electronic sound) during panel operation
ON: Used
OFF: Not used
* The buzzer will always be ON when a warning or error is displayed.
Additional display time for model name in head detector PCB when power
switch is turned on
0: Not displayed
1-10: Machine head model name is displayed for the set time in the main
display using 8 characters
Limit for maximum speed setting in start and end backtacking speed settings
ON: Limited by MAX key and speed bar key settings
OFF: Not limited by MAX key and speed bar key settings
End backtack sewing speed
ON: Separate setting from start backtack sewing speed is possible
OFF: Setting for start backtack sewing is used
* Refer to “4-3. Maximum sewing speed and start backtack sewing speed
setting methods”.
Correction sewing function
* This is only enabled when No. 500 is set to “1”.
* When the <correction sewing> icon at the left side is turned off, the
operation will be what is illuminated at the right side.
0: Half stitch correction sewing / Single stitch correction sewing
1: No correction sewing / Single stitch correction sewing
2: Reverse stitch (reverse feed) correction sewing / Single stitch correction
sewing
S-7200C
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Page 28
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
Sewing program settings (450-)
No.
Setting
range
Initial
value
Setting
units
Setting details
Correction sewing using actuator switch after thread trimming
450 ON/OFF OFF -
* This is only enabled when No. 500 is set to “1”.
ON: Enabled
OFF: Disabled (switch operation disabled)
Speed for moving to end backtack
(Set to “ON” if you want cycle time to be shorter.)
451 ON/OFF (*1) -
OFF: Decelerates to low speed, then end backtacking starts
ON: Decelerates to end backtacking speed, then end backtacking starts
* If No. 452 has been set to “ON”, the operation when No. 451 is set to “ON”
will be disabled.
Seam matching function during automatic backtacking
(Set to “ON” if you want to match seams accurately during automatic
backtacking.)
452 ON/OFF OFF -
ON: Momentarily stops when material feed direction is changed
OFF: No stopping when material feed direction is changed
* The stopping position for No. 453 can be changed by changing the time
before restarting using No. 454.
Momentary stopping position when material feed direction is changed
(The stopping position is the angle from when the needle up signal turns ON.)
* This is only enabled when No. 452 is set to “ON”.
453
0-350
(degrees)
180
(degrees)
10
Momentary stopping time when material feed direction is changed
454
10-500
(ms)
100
(ms)
10
(ms)
(The quick reverse mechanism switches at the stopping position, and then
after the stopping time has elapsed, sewing automatically restarts.)
* This is only enabled when No. 452 is set to “ON”.
Synchronization function when quick reverse mechanism has been operated
using the actuator switch
455
OFF/
1-2
(*2) 1
OFF: Disabled (Quick reverse mechanism is synchronized with switch)
1: Quick reverse mechanism synchronization without motor deceleration
2: Quick reverse mechanism synchronization when motor decelerates
automatically to the speed set by No. 456
300-4000
456
457
458
(sti/min)
0-355
(degrees) 0 (degrees)
0-355
(degrees)
471 ON/OFF
4000
(sti/min)
150
(degrees)
OFF
(*3)
100
1
1
- Spare
Automatic deceleration speed when quick reverse mechanism has been
operated using the actuator switch
* This is only enabled when No. 455 is set to “1” or “2”.
Quick reverse mechanism operation angle at low speed (less than 1000
sti/min)
* This is only enabled when No. 455 is set to “1” or “2”.
Quick reverse mechanism operation angle at high speed (1000 sti/min or
more)
* This is only enabled when No. 455 is set to “1” or “2”.
(*1) The initial value varies depending on the destination. For Japan, the initial value is “ON”, and for all other destinations, it is “OFF”.
(*2) The initial value varies depending on the destination. For Japan, the initial value is “OFF”, and for all other destinations, it is “2”.
(*3) This is not initialized during initialization mode.
19
S-7200C
Page 29
Standard device settings (550-)
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
No.
Setting
range
Initial
value
Setting
units
Automatic presser foot lifter type
0: Solenoid type
1
(Duty during chopping can be changed using No. 565.)
1: Pneumatic type
550 0-1
0
(*1)
(Duty during chopping can be changed using No. 566.)
551
555
556
557
558
0-500
(ms)
-345-345
(degrees) 0 (degrees)
-345-345
(degrees) 0 (degrees)
-345-345
(degrees) 0 (degrees)
-345-345
(degrees) 0 (degrees)
150
(ms)
10
(ms)
Sewing machine motor start delay time when presser foot is raised
Quick reverse solenoid on timing during start backtacking/continuous
1
backtacking
Quick reverse solenoid off timing during start backtacking/continuous
1
backtacking
1 Quick reverse solenoid off timing during end backtacking
Quick reverse solenoid on timing during end backtacking
1
* This is only enabled when No. 451 is set to “ON”.
Thread wiping and presser foot lift operation timing after thread trimming
560
561
562
563
564
565
566
10-200
(ms)
10-200
(ms)
10-200
(ms)
10-990
(ms)
0-240
(seconds)
10-60
(%)
10-60
(%)
20
(ms)
50
(ms)
50
(ms)
300 (ms)
180
(seconds)
25
(%)
50
(%)
(ms)
(ms)
(ms)
(ms)
10
10
10
10
Presser foot lifting
Presser foot lifter solenoid fully ON time
Presser foot lift time
0: No timer function (does not drop)
1
1-240: Presser foot drops after set time
On duty when solenoid-type presser lifter solenoid is chopping
1
* This is only enabled when No. 550 is set to “0”.
On duty when pneumatic-type presser lifter solenoid is chopping
1
* This is only enabled when No. 550 is set to “1”.
Presser foot soft down mode
567 0-1 0 1
0: Automatic mode (This can be adjusted using No. 569.)
1: Manual mode (This must be adjusted using No. 568.)
Delay time for presser foot lifter solenoid to turn on after presser foot drop
5
command
* This is only enabled when No. 567 is set to “1”.
568
20-120
(ms)
40
(ms)
(ms)
Voltage detection constant for presser foot lifter solenoid to turn on after
569 10-12 12 1
presser foot drop command
* This is only enabled when No. 567 is set to “0”. If it is set to “10”, the
response time will be fastest and the operating sound will be loudest.
573
574
40-100
(ms)
10-60
(%)
85
(ms)
40
(%)
5
(ms)
Fully on time for quick reverse solenoid
1 On duty when quick reverse solenoid is chopping
(*1) This is not initialized during initialization mode.
Setting details
Motor
Thread wiping
Needle up stop
2016B
S-7200C
20
Page 30
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
Error processing settings (650-)
No.
650
651
652
Setting
range
OFF/
5-30
(seconds)
OFF/
1-30
(minutes)
ON/OFF ON -
Initial
value
OFF 1
3
(minutes)
Setting
units
1
Setting details
Time until buzzer stops (seconds)
OFF: Buzzer does not stop
5-30: Buzzer stops after the specified time
Overtime error display
* If the thread wiper key is OFF, error displays do not appear.
OFF: None
1-30: After continuous operation for the set length of time, operation stops and
[E190] is displayed.
Needle up stop error display
OFF: None
ON: If the needle does not stop at the up position after thread trimming, [E111]
is displayed.
Specifications and destination settings (850-)
No.
851 ON/OFF
852 ON/OFF (*1) -
(*1) This is not initialized during initialization mode.
Setting
range
The initial value varies depending on the destination. For Europe and the Americas, the initial setting is “ON”, and for all
other destinations are “OFF”.
Initial
value
(*1)
Setting
units
Setting details
Treadle operation specifications
ON: Specifications for Europe and the Americas
・ If No. 001 is “OFF”
(When the treadle is returned to the neutral position after thread
trimming, the presser foot is lowered.)
* If the treadle is returned to the neutral position during thread trimming,
the presser foot does not rise.
・ If No. 001 is “ON”
After thread trimming, the presser foot rises.
The presser foot does not drop even when the treadle is returned to the
neutral position.
-
・ If No. 001 or No. 002 is “ON”
(Even after the treadle has been depressed to the 1st step and the
presser foot has dropped, the presser foot rises when the treadle is
returned to the neutral position.)
* If No. 852 and No. 057 are not both “ON” at the same time, the
presser foot lowering function at the treadle’s 1st step will be disabled.
OFF: Other specifications
・ The presser foot does not drop even when the treadle is returned to the
neutral position after thread trimming.
・ When the treadle is depressed backward or the knee switch changes
from ON to OFF, the presser foot drops.
(The presser foot does not rise at the treadle neutral position
regardless of the settings for No. 001 and No. 002.)
Presser foot lowering at the forward 1st step
ON: Enabled
OFF: Disabled
21
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4. FUNCTION SETTINGS (G50 OPERATION PANEL)
4-7. Data initialization function
NOTE:
When DIP switch 1 is set to ON, set it to OFF and then carry out the following operations.
Change to initialization mode
1
(While pressing the RESET key, press the power ON switch.)
Select the item to be initialized
2
Item No. Main display Details to be initialized
1 [INIT ALL]
2 [INIT MEM] Memory switches
3 [INIT SPD]
4 [INIT SEW]
Clears all settings
(Items 2, 3 and 4 will be initialized.)
“init ALL” will appear in orange
in the main display (1).
4195M
3
(Press for 2 seconds or more)
4
2094B
Once initialization is complete, the main display (1) will return to
green.
NOTE:
If the initialization items are changed after initialization, the
color will return to orange
Initialization mode will be exited and normal sewing machine
operation will then be possible.
.
4192M
4193M
S-7200C
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Page 32
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
*
4-8. Error history checking method
The past error history can be checked by the following procedure.
Change to error history display mode
1
(While pressing the MAX key, press the power ON switch.)
Changing the history number (A)
2
The history number (A) and the error code (B) will
appear in the main display (1) in orange.
NOTE:
The following error codes do not remain in
the history, and so they will not be displayed.
[E065, E066, E095, E440, E441, E901]
Up to 99 histories (01-99) are stored in order starting from the
newest. No. 01 represents the newest error.
(If there is no error code for a history number, [E---] will be
displayed as the error code.)
While the key (2) is being pressed, the main display (1) will
change to displaying the time that the error occurred.
(The last 7 digits of [T*******] are the time. [Units: hours])
When the key (2) is released, the display returns to the
original error code display.
2018B 2040B 2138M
2017B
3
Turn off the power switch to exit error history checking mode.
23
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Page 33
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
4-9. Input checking method
This is used at the following times.
・ When there is a problem with an operation panel key, PCB or sensor
・ When you would like to check for broken cords
・ When you would like to adjust a sensor position
This lets you check if the CPU is reading signals from the keys and the sensors correctly.
Change to input check mode
1
2019B 2138M
(While pressing the key, press the power ON switch.)
Select the item number (A)
2
Check the responses from the keys and switches, etc. while referring to the <Input check list> (following page).
3
[To return to the normal sewing machine starting condition]
4
Press the power OFF switch to turn off the power, and then turn the power back on.
* If 2 seconds pass without no operations having been carried out,
the four characters on the left side of the main display will
alternately display the item number and the item name.
The item number (A) and the input status (B)
will appear in the main display (1) in orange.
(Item number)
(Item name)
2036B 2095B
S-7200C
24
Page 34
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
<Input check list >
The four characters on the left side of the main display on the operation panel show the item number/item name, and the four
characters on the right side show the input status.
Item No. Item name Input status Check item and checking method
[ 1] [ PDL] [0.000]-[5.000] [V]
[ 2] [ ENC] [ 0]-[ 359] [degrees]
[ 3] [NLUP] [ ON]-[ OFF]
[ 4] [NLDN] [ ON]-[ OFF]
[ 5] [UPOG] [ ON]/[ OFF]
[ 6] [REZL] [ ALL]/[TES1]-[TES7]
[ 7] [VOLT] [ ***]
[ 8] [HEAD] [ ON]-[ OFF]
[ 9] [ BT] [ ON]-[ OFF]
[ 10] [ PRE] [ ON]-[ OFF]
[ 11] [OPDL] [0.000]-[5.000] [V]
[ 12] [HIGH] [ ON]-[ OFF]
[ 13] [TRIM] [ ON]-[ OFF]
[ 14] [INCH] [ ON]-[ OFF]
[ 15] [ PNL] [****]/[ OFF]
Treadle pedal voltage
Depress the treadle forward/backward.
Motor position signal (needle up side reference signal = 0 degrees)
Turn the machine pulley by hand.
* The input will be unstable until the reference signal from the
resolver is detected.
Needle up signal
Turn the machine pulley by hand.
* The input will be unstable until the reference signal from the
resolver is detected.
Needle drop signal
Turn the machine pulley by hand.
* The input will be unstable until the reference signal from the
resolver is detected.
Needle up sensor signal
Turn the machine pulley by hand.
Resolver signal test
* Refer to <Resolver signal test> (P.27).
Power supply voltage
100 V systems : Display value ÷ 2 is the actual voltage.
200 V systems : The display value is the actual voltage.
400 V systems : Display value × 2 is the actual voltage.
* There may be an error of about ±5% in the display value.
Safety switch input
Becomes “OFF” when the machine head is tilted back.
Actuator switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Knee switch or standing pedal presser foot lifter switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Standing pedal speed input
Depress the variable speed pedal of the standing pedal.
Standing pedal high speed switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Standing pedal thread trimming switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Standing pedal low speed switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Operation panel key input
Press any key on the panel other than B or B .
The name of the key pressed will be displayed as the right four
characters.
If no key is pressed, “OFF” will be displayed.
* Refer to <Operation panel key input> (P.28).
Item No. Item name Input status Check item and checking method
[ 17] [ IN1] [ ON]-[ OFF]
[ 18] [ IN2] [ ON]-[ OFF]
[ 19] [ IN3] [ ON]-[ OFF]
[ 20] [DIP1] [ ON]-[ OFF]
[ 21] [DIP2] [ ON]-[ OFF]
[ 22] [DIP4] [ ON]-[ OFF]
[ 23] [EDGK] [ ON]-[ OFF] Spare
[ 24] [EDGS] [ ON]-[ OFF] Spare
Option input 1
“ON” when the input signal is LOW, and “OFF” when it is HIGH.
Option input 2
“ON” when the input signal is LOW, and “OFF” when it is HIGH.
Option input 3
“ON” when the input signal is LOW, and “OFF” when it is HIGH.
DIP switch 1
“ON” when the switch is at ON, and “OFF” when the switch is at OFF.
DIP switch 2
“ON” when the switch is at ON, and “OFF” when the switch is at OFF.
DIP switch 4
“ON” when the switch is at ON, and “OFF” when the switch is at OFF.
S-7200C
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Page 36
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
A
r
t
<Resolver signal test>
Select the test number
1
Test number
Test number Test name
[ ALL] All tests (Test 1-Test 7)
[TES1] Test 1 (Individual)
[TES2] Test 2 (Individual)
[TES3] Test 3 (Individual)
[TES4] Test 4 (Individual)
[TES5] Test 5 (Individual)
[TES6] Test 6 (Individual)
[TES7] Test 7 (Individual)
Start the test
A. For all tests ([ ALL])
2
B. For individual tests (example: [TES1])
Test number
Test number
Test result
(OK / NG)
Test result
(OK / NG)
ll tests from Test 1 to Test 7 are carried out.
・ If all tests are completed and the results are
all OK, [7 OK] will be displayed as the right
four characters in the main display.
・ If an NG result occurs during the test, [* NG]
will be displayed as the right four characters
in the main display. (* indicates the numbe
of the test which produced the NG result.)
The test specified by the number will be
carried out.
・ If the test is completed and the result is
OK, [* OK] will be displayed as the righ
four characters in the main display. If the
result is NG, [* NG] will be displayed.
NOTE:
Once testing has started, no items other than a resolver signal test can be checked. To check a different item,
carry out step 4 given below, and then change back to input check mode.
[If carrying out another resolver signal test]
3
1)
2) Repeat steps 1 and 2 above.
[To return to the normal sewing machine starting condition]
4
1) Press the power OFF switch to turn off the power.
2) Check that the power indicator (green) on the operation panel has turned off, and then turn the power back on.
NOTE:
If you turn the power back on while the power indicator (green) is still illuminated, [E131] may be displayed.
2020B
2021B 2022B
2023B
27
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Page 37
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
<Operation panel key input>
Sewing speed control keys Lower thread counter keys
・ When there is a problem with the operation panel PCB
・ When there is a problem with the drive mechanism
・ When you would like to check for broken codes.
You can check whether the signals being output by the CPU are driving the mechanisms correctly.
Change to output check mode
1
The item number (A) and the output
status (B) will appear in the main
(While pressing the key, press the power ON switch.)
Select the item number (A)
2
* If 2 seconds pass without no operations having been carried out,
the four characters on the left side of the main display will
alternately display the item number and the item name.
display (1) in orange.
2031B 2139M
(Item number)
(Item name)
3
[To check another item]
4
Return the treadle to the neutral position, and then repeat the operations in steps 2 and 3 above
[To return to the normal sewing machine starting condition]
5
Press the power OFF switch to turn off the power, and then turn the power back on.
The operation corresponding to the item number being checked will be carried out.
2036B 2097B
2159M
.
29
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Page 39
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
<Output check list >
The four characters on the left side of the main display on the operation panel show the item number/item name, and the
four characters on the right side show the output status.
Item No. Item name Output status Check item and checking method
Thread trimming solenoid
[ 1] [ TRM] OFF
[ 2] [ WIP] OFF
[ 3] [ REV] OFF
[ 4] [ PRE] OFF
[ 5] [ OPT] OFF
[ 6] [INCH]
[ 7] [TRIM]
[ 8] [SLOW]
[ 9] [ SBT]
[ 10] [ EBT]
[ 11] [HIGH]
[ 12] [AUTO]
[ 13] [ POS]
[****] [sti/min]
Shows the actual
sewing machine
speed
When the treadle is depressed, the solenoid operates for 2 seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Thread wiper solenoid
When the treadle is depressed, the solenoid operates for 2 seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Quick reverse solenoid
When the treadle is depressed, the solenoid operates for 2 seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Presser foot lifter solenoid
When the treadle is depressed, the solenoid operates for 2 seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Option solenoid signal
When the treadle is depressed, the solenoid signal turns on for 2
seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Inching speed operation
When the treadle is depressed, the upper shaft rotates at the inching
speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
Thread trimming speed operation
When the treadle is depressed, the upper shaft rotates at the thread
trimming speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
Slow speed operation
When the treadle is depressed, the upper shaft rotates at slow
speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
Start backtack sewing speed operation
When the treadle is depressed, the upper shaft rotates at the start
backtack sewing speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
End backtack sewing speed operation
When the treadle is depressed, the upper shaft rotates at the end
backtack sewing speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
High speed operation
When the treadle is depressed, the upper shaft rotates at a speed
corresponding to the treadle depression amount (inching speed to
maximum speed).
When the treadle is returned to the neutral position, the upper shaft
stops.
Automatic speed operation
When the treadle is depressed, the upper shaft rotates at the
automatic speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
Stop improvement speed operation
When the treadle is depressed, the upper shaft rotates at the stop
improvement speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
(Continued on next page.)
S-7200C
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Page 40
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
Item No. Item name Output status Check item and checking method
[ 14] [BUZZ] OFF
[ 15] [ PNL] [****]
[ 16] [MOVE] OFF
[ 17] [OUT1] OFF
[ 18] [OUT2] OFF
Buzzer
When the treadle is depressed, the buzzer sounds for 1 second.
Panel display
When the treadle is depressed, checking of the operation panel
indicators, main display, speed display and lower thread counter
display starts.
When the treadle is returned to the neutral position, all indicators will
illuminate, and then the display will return to how it was before the
treadle was depressed.
Operation synchronization signal
When the treadle is depressed, the operation synchronization signal
turns on.
When the treadle is returned to the neutral position, the signal turns
off.
Option output signal 1
When the treadle is depressed, the option output signal turns on.
When the treadle is returned to the neutral position, the signal turns
off.
Option output signal 2
When the treadle is depressed, the option output signal turns on.
When the treadle is returned to the neutral position, the signal turns
off.
31
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Page 41
4-11. Protection settings
Set the power switch to OFF, and then set DIP switch 1 to OFF.
1
Change to protect setting mode
2
(While pressing the key and the start backtack key,
press the power
Set the protection level (0 to 3)
3
ON switch.)
NOTE:
* If the protection level is different from the original value, the
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
(Protection level)
[PLV] and the protection level will appear in the main
display (1) in orange. (At the time of shipment from the
factory, the protection level is set to “1”.)
2032B 2138M
The range for disabling operation varies depending on the
setting for DIP switch 1.
For details, refer to <Protection setting list> (P.34).
protection level will flash in the display.
[If set to level 0 – 2]
Confirm the protection level (example: set to level 2)
4
5
2033B
The protection level will return to illuminating
steadily.
Protect setting mode will be exited and normal operation will be possible
2034B
4193M
.
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4. FUNCTION SETTINGS (G50 OPERATION PANEL)
[If set to level 3]
To make individual settings, select level 3.
Confirm the protection level
4
Individual setting number
* When the
Select an individual setting number (1 – 6)
5
Make the individual protection (ON/OFF) setting
6
Protection setting value (ON/OFF)
key is pressed, the display will return to the
protection level setting display [PLV 3].
NOTE:
The range for disabling operation varies depending on the
setting for DIP switch 1.
For details, refer to <Protection setting list> (P.34).
Individual
setting number
1 MAX key
2 Memory switches (for administrator)
3 Correction key
4 Mainly keys with indicators
5 Stitch number settings (ABCD, EF)
6 Initialization
Use the key to turn the setting on, and use the key to
turn the setting off.
* If the individual protection setting value is different from the
original value, the protection setting value will flash.
Details of main operation disabled
2035B 4161M
2036B
Confirm the protection setting value
7
8
The protection setting value will return to illuminating steadily.
2033B 2138M 2139M
Protect setting mode will be exited and normal operation will be possible.
4192M
4193M
33
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Page 43
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
<Protection setting list>
○: Enabled
□: Immediately after the power is turned on, the LOCK key icon will show the previous status. After this, the LOCK key can
be used to change the enabled/disabled status.
△: Immediately after the power is turned on, the function is disabled (the LOCK icon illuminates). After this, the LOCK key
can be used to change the enabled/disabled status.
×: Disabled
Level
Setting function
Sewing speed ([MAX] setting)
Memory
Switch
Setting
[Half stitch] key
[Needle up/down] setting
[Correction] setting
[Slow start] setting
[Thread trimming disabled] setting
[Thread wiping] setting
[LOCK] setting
[Start backtack] setting
[End backtack] setting
[Continuous backtack] setting
[Fixed stitch] setting
[Name label] setting
[Pleat presser sewing] setting
[AUTO] setting
[Automatic thread trimming] setting
A-D stitch number setting
E / F stitch number setting
Speed level setting
Lower thread counter initial value
setting
Initialization
Protection setting
* Values inside ( ) are when DIP switch 1 is set to ON.
* Individual settings are disabled if even one of 1 to 6 is ×. If all columns are blank, the setting is enabled.
After startup
For operator
When power is on
For mechanic
3 (Individual setting)
0 1 2
□
(×) △(×) × (×) □ (×) × (×) (×) (×) (×) (×) (×)
□
(×) △(×) × (×) □ (×) (×) (×) (×) (×) (×) (×)
○
(○) ○ (○) × (×) ○ (○) ( ) × (×) ( ) ( ) ( ) ( )
○
(○) ○ (○) ○ (○) ○ (○) ( ) ( ) ( ) ( ) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) × (×) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(×) ○(×) ×(×) ○ (×) (×) (×) (×) × (×) (×) (×)
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) ( ) × (×) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) ( ) × (×) ( )
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) ( ) × (×) ( )
○
(×) ○(×) ○(×) ○ (×) ( ) ( ) ( ) ( ) × (×) ( )
○
(×) ○(×) ○(×) ○ (×) (×) (×) (×) (×) (×) × (×)
○
(×) ○(×) ○(×) ○ (×) (×) (×) (×) (×) (×) (×)
All
OFF
①
=ON ② =ON ③ =ON ④ =ON ⑤ =ON ⑥ =ON
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4. FUNCTION SETTINGS (G50 OPERATION PANEL)
4-12.
Software version checking method
Change to version display mode
1
(While pressing the speed key (+), press the power ON switch.)
Select the software type (A)
2
The software type (A) and the software version (B)
will be displayed in the main display (1) in orange.
Software type (A) Software Version (B)
[1. MN] Main CPU [1.0|00]
[2. PL] Panel CPU [1.000]
[3.IPL] Main IPL [1.000]
* Initially the main CPU version will be displayed.
2037B
3
Version display mode will be exited and normal operation will be possible.
2038B
4193M
35
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r
4. FUNCTION SETTINGS (G50 OPERATION PANEL)
4-13. Viewing maintenance information
This allows you to check the information which is stored in the head detector unit.
Change to maintenance display mode
1
(While pressing the keys, press the power ON switch.)
Select the item name
2
The item name (A) and the details fo
that item (B) will be displayed in the
main display (1) in orange.
No. Item name
1 Grease up counter *1 [GUCT] [ 0-102](%)
2 Grease-up time [GULI] [4000] (hours)
Cumulative power on time
3
(7 characters)
Cumulative operating time
4
(7 characters)
Item name (A)
2039B 2138M 2139M
display
[PONT] [****] (hours) *2
[MONT] [****] (hours) *2
Details (B)
3
*1 : If the RESET key is pressed for 2 seconds or more while the grease up
counter details are being displayed, the counter will be cleared.
*2 : Normally the last 4 digits of the counter are displayed, but if you press the
key (2), the first three digits ([T***]) will be displayed.
2036B 2040B 2138M
Maintenance display mode will be exited and normal operation will be possible.
4193M
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4. FUNCTION SETTINGS (G50 OPERATION PANEL)
4-14. Adjusting the sewing machine reference position
Change to sewing machine reference position adjustment mode
1
The adjustment item name (A) and the
adjustment value for that item (B) will be
(While pressing the key, press the power ON switch.)
displayed in the main display (1) in orange.
Select the adjustment item
2
2041B 2138M
2042B
Adjustment item
Sewing machine reference
1
position (Adjustment when
motor is replaced)
Needle up stop position (during
2
individual adjustment)
Needle down stop position
3
(during individual adjustment)
Adjustment
item name (A)
Main display
[MORG] -20-20 degrees
[UPOS] -5-10 degrees
[DPOS] -5-10 degrees
* “1 Sewing machine reference position” is adjusted at the time of shipment from the factory.
* If you would like to change only the stop positions, make adjustments at “2 Needle up stop position” or “3
Needle down stop position”.
NOTE:
When an adjustment value is changed, the needle up and needle down signal positions will change.
Other settings such as solenoid operation timing and needle up/down stop positions will change in line
with this.
Set the adjustment value (B)
3
* If you would like to clear the value which is being displayed, press
the
* If the adjustment value is different from the original value, the
adjustment value will flash.
key.
Adjustment
value (B)
4
5
37
2043B 4173M
Save the adjustment value. The adjustment value (B) will change
from flashing to illuminated steadily.
NOTE:
Any changed settings will take effect after sewing machine
reference position adjustment mode has been exited.
Sewing machine reference position adjustment mode will be exited and
normal operation will be possible.
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4193M
Page 47
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
5-1. List of special functions when power is turned on
This section contains a list of functions for the G10 operation panel and the key operations which are used to call the setting
mode for the functions.
1991B
Memory switch setting mode (Standard)
1
(This setting is not possible with the G10
operation panel.)
Memory switch setting mode (Advanced)
2
(This setting is not possible with the G10
operation panel.)
Data initialization function
3
2045B
Protect setting mode
7
[DIP switch 1 = OFF]
(C)
Software version display function
8
Refer to “5-7. Protection settings”.
Refer to “5-8. Software version checking method”.
Treadle position adjustment mode
9
[DIP switch 4 = ON]
Refer to “5-3. Data initialization function”.
Error log display function
4
Refer to “5-4. Error history checking method”.
Input checking function
5
(A)
Output checking function
6
(A)
Refer to “5-6. Output checking method”.
Refer to “5-5. Input checking method”.
2046B, 2047B, 1999B, 1996B
(C)
Refer to “13. SETTING METHOD FOR STANDARD
DEPRESSION STROKES”.
Sewing machine reference position adjustment mode
10
(B)
Refer to “5-10. Adjusting the sewing machine reference
position”.
Maintenance information viewing mode
11
(D)
(D)
Function setting mode
12
Refer to “5-9. Viewing maintenance information”.
Refer to “5-2. Function setting method”.
1997B, 2048B, 1999B, 2000B, 2049B
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
y
5-2. Function setting method
Change to function setting mode
1
(While pressing the end backtack key, press the power ON switch.)
Select the setting item (Refer to <Setting item list> (P.40))
2
(Setting item)
(Setting item)
4203M
Change to the setting value display
3
Change the setting value.
4
Confirm the setting value.
5
(Setting value)
* If the setting value is different from the original details, the
setting value will flash.
NOTE:
If the start backtack key (1) is pressed once more, the
start backtack indicator will switch off and the displa
will return to the setting item.
(Setting item)
2050B
2051B
2052B
To set other items, repeat the operations in steps 2 to 5 and change the settings.
6
7
Function setting mode will be exited and normal operation will be possible.
39
S-7200C
2053B
4206M
Page 49
<Setting item list>
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
Display
Setting item
Needle up/down stop [UPDN]
Correction sewing [CORR]
Slow start [SLOW]
Thread trimming disable [TRDI]
Start backtack speed [SBSP] [****]
Automatic operation
during continuous
backtack sewing
Pedal response switching
settings immediately after
sewing has started
Pedal response
immediately after sewing
has started
Start backtack sewing
pattern
End backtack sewing
pattern
sewing pattern
function
function
(*1) The inching speed setting value is the value in the machine head memory.
Setting item
display
[CBAT]
[SLMD]
[SLPN] [ *]
[SBTP]
[EBTP]
[RBTP]
[ RUP]
[BTAD]
Setting value
display
[ UP] Needle up stop
[ DN] Needle down stop
[ ON] Correction sewing
[ OFF] No correction sewing
[ ON] Slow start
[ OFF] No slow start
[ ON] Thread trimming disabled
[ OFF] Thread trimming enabled
[ ON] Automatic operation
[ OFF] No automatic operation
[ OFF] No switching
[ 1]
[ 2]
[ 3] Slow start always when sewing starts
[ 2] A-B
[ 3] B-A-B
[ 4] A-B-A-B
[ 5] B-A-B-A-B
[ 6] A-B-A-B-A-B
[ 2] C-D
[ 3] C-D-C
[ 4] C-D-C-D
[ 5] C-D-C-D-C
[ 6] C-D-C-D-C-D
[ 1] A, B, C, D Continuous backtack
[ 2] A, B × D
[ ON] Function available Quick reverse needle up
[ OFF] Function not available
[ ON] Function available Backtack matching
[ OFF] Function not available
Setting value or operation when setting
Inching speed (*1)-3000
(Initial value depends on machine head
specifications)
Slow start only when sewing starts after
thread trimming
Slow start only when sewing starts after
sewing has been paused
* Setting range: 1-5
・ The larger the value, the slower is the
speed when sewing starts.
・ If [SLMD] is set to “OFF”, this setting is
disabled.
Default
value
[ DN]
[ OFF]
[ OFF]
[ OFF]
[1200]
[1800]
[ OFF]
[ OFF]
[ 1]
[ 2]
[ 2]
[ 1]
[ OFF]
[ OFF]
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
5-3. Data initialization function
NOTE:
When DIP switch 1 is set to ON, set it to OFF and then carry out the following operations.
Change to initialization mode
1
[in.AL] will appear in the display (1).
(While pressing the continuous backtack key, press the power ON switch.)
Display
1 [in.AL]
* The only initialization item is clear all.
Clear all
(Sewing programs (panel display), memory switch settings, speed settings and
function settings [Refer to <Setting item list> (P.40)] will be initialized.)
Initialization item
2
Function setting mode will be exited and normal operation will be possible.
(If you would like to cancel initialization, set the power switch to OFF.)
4222M
(Press for 2 seconds or more.)
4206M
41
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r
f
5-4. Error history checking method
The past error history can be checked by the following procedure.
Change to error history display mode
1
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
(Error history number)
(While pressing the MAX key, press the power ON switch.)
Change the error history number
2
Check the history details
3
[If checking the details for another error history number]
4
1)
(Error code)
(Error history number)
Up to 99 histories (01-99) are stored in order starting from
the newest. (No. 01 represents the newest error.)
If there is no error code, [E---] will be displayed.
* While the key (1) or the key (2) is being pressed,
the display will change to displaying the time the erro
occurred.
・While the key is being pressed, the last 4 digits are
displayed. [Units: 1 hour]
・While the key is being pressed, the first 3 digits
([T***]) are displayed. [Units: 10,000 hours] However, i
the total is less than 10,000 hours, the first 3 digits will
not be displayed.
・When the key is released, the display returns to the
original error code.
NOTE:
The following error cods do not remain in the history,
and so they will not be displayed.
[E065, E066, E095, E440, E441, E901]
2056B 2139M 2138M
2054B
2055B
2) Repeat steps 2 and 3 above.
[To exit error history display mode]
5
Set the power switch to OFF.
2057B
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
5-5. Input checking method
This is used at the following times.
・ When there is a problem with an operation panel key, PCB or sensor
・ When you would like to check for broken cords
・ When you would like to adjust a sensor position
This lets you check if the CPU is reading signals from the keys and the sensors correctly.
Change to input check mode
1
(While pressing the key, press the
power ON switch.)
Select the item number (A)
2
(Item number)
* If 2 seconds pass without no operations having been carried
out, the display will alternately show the item number and the
item name.
(Item number)
(Item number)
2058B 2138M
(Item name)
Change to input status display
3
Check the responses from the keys and switches, etc. while referring to the <Input check list> (P.44).
4
[To check another item number]
5
1)
2) Repeat steps 2 to 4 above.
(Input status)
(Setting item)
2059B 2060B
2061B
2073B
Set the power switch to OFF and then turn the power back on again.
6
43
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
<Input check list >
The display on the operation panel shows the item number/item name, or the input status.
Item No. Item name Input status Checking item and checking method
Motor position signal (needle up side reference signal = 0 degrees)
Turn the machine pulley by hand.
* The input will be unstable until the reference signal from the
resolver is detected.
Needle up signal
Turn the machine pulley by hand.
* The input will be unstable until the reference signal from the
resolver is detected.
Needle drop signal
Turn the machine pulley by hand.
* The input will be unstable until the reference signal from the
resolver is detected.
Needle up sensor signal
Turn the machine pulley by hand.
Resolver signal test
* Refer to <Resolver signal test> (P.46).
Power supply voltage
100 V systems : Display value ÷ 2 is the actual voltage.
200 V systems : The display value is the actual voltage.
400 V systems : Display value × 2 is the actual voltage.
* There may be an error of about ±5% in the display value.
Safety switch input
Becomes “OFF” when the machine head is tilted back.
Actuator switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Knee switch or standing pedal presser foot lifter switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Standing pedal speed input
Depress the variable speed pedal of the standing pedal.
Standing pedal high speed switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Standing pedal thread trimming switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Standing pedal low speed switch input
“ON” when the switch is ON, and “OFF” when the switch is OFF.
Operation panel key input
Press any key on the panel other than B or B .
The name of the key pressed will be displayed as the right four
characters.
If no key is pressed, “OFF” will be displayed.
* Refer to <Operation panel key input> (P.47).
(Continued on next page.)
2138M 2139M
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
Item No. Item name Input status Checking item and checking method
[ 17] [ IN1]
[ 18] [ IN2]
[ 19] [ IN3]
[ 20] [DIP1]
[ 21] [DIP2]
[ 22] [DIP4]
[ ON]~[ OFF]
[ ON]~[ OFF]
[ ON]~[ OFF]
[ ON]~[ OFF]
[ ON]~[ OFF]
[ ON]~[ OFF]
Option input 1
“ON” when the input signal is LOW, and “OFF” when it is HIGH.
Option input 2
“ON” when the input signal is LOW, and “OFF” when it is HIGH.
Option input 3
“ON” when the input signal is LOW, and “OFF” when it is HIGH.
DIP switch No. 1
“ON” when the switch is at ON, and “OFF” when the switch is at OFF.
DIP switch No. 2
“ON” when the switch is at ON, and “OFF” when the switch is at OFF.
DIP switch No. 4
“ON” when the switch is at ON, and “OFF” when the switch is at OFF.
45
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A
<Resolver signal test>
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
Change to test number display
1
(Item number)
Select the test number
2
Start the test
3
When the thread wiper key is pressed, the test starts.
A. For all tests [ ALL]
Test number
Test result
(OK / NG)
B. For individual tests [TES*]
Test number
NOTE:
Once testing has started, no items other than a resolver signal test can be checked.
To check a different item, carry out step 5 given below, and then change back to input check mode.
[If carrying out another resolver signal test]
Test result
(OK / NG)
4
(Test number)
Number Test number Test name
1 [ ALL] All tests (Test 1-Test 7)
2 [TES1] Test 1 (Individual)
3 [TES2] Test 2 (Individual)
4 [TES3] Test 3 (Individual)
5 [TES4] Test 4 (Individual)
6 [TES5] Test 5 (Individual)
7 [TES6] Test 6 (Individual)
8 [TES7] Test 7 (Individual)
ll tests from Test 1 to Test 7 are carried out.
・ If all tests are completed and the results are all OK, [7 OK]
will be displayed.
・ If an NG result occurs during the test, [* NG] will be
displayed as the right four characters in the display.
(* indicates the number of the test which produced the NG
result.)
Number of the test specified will be carried out.
・ If the test is completed and the result is OK, [* OK] will be
displayed as the right four characters in the display.
・ If the result is NG, [* NG] will be displayed.
2063B
2064B
2065B 2066B
Returns to test number display.
[To return to the normal sewing machine starting condition]
5
(Check)
2067B
NOTE:
If you turn the power back on while the power indicator (green) is still illuminated, [E131] may be
displayed.
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2068B
46
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
<Operation panel key input>
Key name Display Key name Display
2045B
(A)
(A)
(B)
(B)
(C)
(C)
[A-UP]
[A-DN]
[B-UP]
[B-DN]
[C-UP]
[C-DN]
2024B-2025B
(D)
(D)
2024B, 2025B, 4174M, 4161M-4163M, 2096B
[D-UP]
[D-DN]
[ WIP]
[ EBT]
[ RBT]
[SPED]
47
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
5-6. Output checking method
This is used at the following times.
・ When there is a problem with the operation panel PCB
・ When there is a problem with the drive mechanism
・ When you would like to check for broken cords
You can check whether the signals being output by the CPU are driving the mechanisms correctly.
Change to output check mode
1
(Item number)
(While pressing the key, press the power ON switch.)
Select the item number
2
(Item number)
Change to output status display
3
4
[To check another item]
5
1) Return the treadle to the neutral position
2)
The operation corresponding to the item number being checked will be carried out.
(Item number)
* If 2 seconds pass without no operations having been carried out,
the display will alternately show the item number and the item
name.
(Item number)
(Item name)
(Output status)
2070B 2139M
2059B 2071B
2072B
2159M
3) repeat the operations in steps 2 to 4 above.
Press the power OFF switch to turn off the power, and then turn the power back on.
6
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2073B
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
<Output check list >
The display on the operation panel shows the item number/item name, or the output status.
Item No. Item name Output status Checking item and checking method
Thread trimming solenoid
[ 1] [ TRM] OFF
[ 2] [ WIP] OFF
[ 3] [ REV] OFF
[ 4] [ PRE] OFF
[ 5] [ OPT] OFF
[ 6] [INCH]
[ 7] [TRIM]
[ 8] [SLOW]
[ 9] [ SBT]
[ 10] [ EBT]
[ 11] [HIGH]
[ 12] [AUTO]
[ 13] [ POS]
[****] [sti/min]
Shows the actual
sewing machine
speed
When the treadle is depressed, the solenoid operates for 2 seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Thread wiper solenoid
When the treadle is depressed, the solenoid operates for 2 seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Quick reverse solenoid
When the treadle is depressed, the solenoid operates for 2 seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Presser foot lifter solenoid
When the treadle is depressed, the solenoid operates for 2 seconds.
When the treadle is returned to the neutral position, the solenoid
turns off.
Option solenoid signal
When the treadle is depressed, the solenoid signal turns on for 2
seconds.
When the treadle is returned to the neutral position, the solenoid
signal turns off.
Inching speed operation
When the treadle is depressed, the upper shaft rotates at the inching
speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
Thread trimming speed operation
When the treadle is depressed, the upper shaft rotates at the thread
trimming speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
Slow speed operation
When the treadle is depressed, the upper shaft rotates at slow
speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
Start backtack sewing speed operation
When the treadle is depressed, the upper shaft rotates at the start
backtack sewing speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
End backtack sewing speed operation
When the treadle is depressed, the upper shaft rotates at the end
backtack sewing speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
High speed operation
When the treadle is depressed, the upper shaft rotates at a speed
corresponding to the treadle depression amount (inching speed to
maximum speed).
When the treadle is returned to the neutral position, the upper shaft
stops.
Automatic speed operation
When the treadle is depressed, the upper shaft rotates at the
automatic speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
Stop improvement speed operation
When the treadle is depressed, the upper shaft rotates at the stop
improvement speed.
When the treadle is returned to the neutral position, the upper shaft
stops.
49
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5. FUNCTION SETTINGS (G10 OPERATION PANEL)
Item No. Item name Output status Checking item and checking method
[ 14] [BUZZ] OFF
[ 15] [ PNL] [****]
[ 16] [MOVE] OFF
[ 17] [OUT1] OFF
[ 18] [OUT2] OFF
Buzzer
When the treadle is depressed, the buzzer sounds for 1 second.
Panel display
When the treadle is depressed, checking of the operation panel
indicators and display will start.
When the treadle is returned to the neutral position, all indicators will
illuminate, and then the display will return to how it was before the
treadle was depressed.
Operation synchronization signal
When the treadle is depressed, the operation synchronization signal
turns on.
When the treadle is returned to the neutral position, the signal turns
off.
Option output signal 1
When the treadle is depressed, the option output signal turns on.
When the treadle is returned to the neutral position, the signal turns
off.
Option output signal 2
When the treadle is depressed, the option output signal turns on.
When the treadle is returned to the neutral position, the signal turns
off.
S-7200C
50
Page 60
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
5-7. Protection settings
Set the power switch to OFF, and then set DIP switch 1 to OFF.
1
Change to protect setting mode
2
(While pressing the key and the start backtack key,
press the power
Set the protection level (0 to 3)
3
[If set to level 0 – 2]
Confirm the protection level (example: set to level 2)
ON switch.)
NOTE:
The range for disabling operation varies depending on the setting
for DIP switch 1.
For details, refer to <Protection setting list”> (P.53).
* If the protection level is different from the original value, the
4
2074B 2138M
(Protection level)
[PLV] and the protection level will be displayed in the
display. (* is the protection level. At the time of shipment
from the factory, the protection level is set to “1”.)
protection level will flash in the display.
2033B
5
(Flashing)
Protect setting mode will be exited and normal operation will be possible
(Illuminated)
2075B
.
4206M
51
S-7200C
Page 61
[If set to level 3]
To make individual settings, select level 3.
Confirm the protection level
4
NOTE:
* When the
protection level setting display [PLV 3].
Select an individual setting number (1-6)
5
key is pressed, the display will return to the
Make the individual protection (ON/OFF) setting
6
Confirm the protection setting value
7
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
Individual setting
number
Individual protection setting value ([-]:OFF、[□]:ON)
NOTE:
The range for disabling operation varies depending on the
setting for DIP switch 1.
For details, refer to <Protection setting list> (P.53).
Individual
setting number
1 MAX key
2 Function setting
3 None (setting disabled)
4 Mainly keys with indicators
5 Stitch number settings (ABCD)
6 Initialization
Details of main operation disabled
Use the key to turn the setting on, and use the key to turn
the setting off.
* If the individual protection setting value is different from the
original value, the protection setting value will flash.
2100B 2138M 2139M
The protection setting value will return to illuminating steadily.
2076B 4161M
2077B
8
2078B
Protect setting mode will be exited and normal operation will be possible.
S-7200C
4206M
52
Page 62
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
<Protection setting list>
Enabled
○:
×:
Disabled
Level
Setting function
Sewing speed ([MAX] setting)
Function setting
[Thread wiping] setting
[Start backtack] setting
[End backtack] setting
[Continuous backtack] setting
A-D stitch number setting
Initialization
Protection setting
* Values inside ( ) are when DIP switch 1 is set to ON.
* Individual settings are disabled if even one of 1 to 6 is ×. If all columns are blank, the setting is enabled.
* The setting details for level 0 and level 1 are the same.
3 (Individual setting)
0 1 2
○
(×) ○(×) × (×) ○ (×) × (×)
○
(○) ○ (○) × (×) ○ (○) ( ) × (×) ( ) ( ) ( ) ( )
○
(○) ○ (○) × (×) ○ (○)
○
(○) ○ (○) × (×) ○ (○)
○
(○) ○ (○) × (×) ○ (○) ( ) ( ) ( ) × (×) ( ) ( )
○
(○) ○ (○) × (×) ○ (○)
○
(○) ○ (○) × (×) ○ (○)
○
(×) ○(×) ○(×) ○ (×)
○
(×) ○(×) ○(×) ○ (×)
All
OFF
1
=ON
( ) ( ) ( )
( ) ( ) ( )
( ) ( ) ( )
( ) ( ) ( ) ( )
(×) (×) (×) (×) (×)
(×) (×) (×) (×) (×) (×)
2
=ON
(×) (×) (×) (×) (×)
3
=ON
4
=ON
(×)
(×)
(×)
×
×
×
5
=ON
=ON
( ) ( )
( ) ( )
( ) ( )
×
(×)
( )
(×)
6
×
53
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Page 63
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
5-8.
1
Software version checking method
Change to version display mode
(While pressing the start backtack key, press the power ON switch.)
Check the versions of each software
2
If you press the buttons as shown in the table, you can check the various software versions.
Indicator Software Version display
Main CPU [1.0.00]
(Version display)
2079B
3
Panel CPU [1.000]
Main IPL [1.000]
2080B 2081B 2082B
Version setting mode will be exited and normal operation will be possible.
4206M
S-7200C
54
Page 64
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
r
*
5-9. Viewing maintenance information
This allows you to check the information which is stored in the head detector unit.
Change to maintenance display mode
1
(While pressing the and keys, press the power ON switch.)
Select the maintenance item
2
Change to detail display
3
(Item name)
(Details)
No. Item name
1 Grease up counter [GUCT]
2 Grease up time [GULI]
3 Cumulative power on time [PONT]
4 Cumulative operating time [MONT]
No.Item name Detail (Display)
1 Grease up counter *1 [ ***] 0-102(%)
2 Grease up time [4000] (Units: 1 hour)
Cumulative power on time
3
(7 characters)
Cumulative operating time
4
(7 characters)
(Item name)
2083B 2138M 2139M
Item name
display
2084B
[****] (Units: 1 hour) *2
[****] (Units: 1 hour) *2
[To check another item]
4
1)
2) Repeat steps 2 to 3 above.
5
*1: If the continuous backtack key is pressed for 2 seconds o
more while the grease up counter details are being
displayed, the counter will be cleared.
2: Normally the last 4 digits of the counter are displayed, but
if you press the key (1), the first three digits will be
displayed.
2085B 2086B 2138M
(Item name)
Maintenance mode will be exited and normal operation will be possible.
2087B
55
S-7200C
4206M
Page 65
5. FUNCTION SETTINGS (G10 OPERATION PANEL)
5-10. Adjusting the sewing machine reference position
Change to sewing machine reference position adjustment mode
1
(Adjustment item name)
2088B 2138M
(While pressing the key, press the power ON switch.)
Select the adjustment item
2
(Adjustment item name)
* “1 Sewing machine reference position” is adjusted at the time of shipment from the factory.
* If you would like to change only the stop positions, make adjustments at “2 Needle up stop position” or “3 Needle
down stop position”.
NOTE:
When an adjustment value is changed, the needle up and needle down signal positions will change.
Other settings such as solenoid operation timing and needle up/down stop positions will change in line
with this.
Change to the adjustment value display
3
(Adjustment value)
Adjustment item
Sewing machine reference
position (Adjustment when
1
motor is replaced)
Needle up stop position
2
(during individual adjustment)
Needle down stop position
3
(during individual adjustment)
* If you press the
to the adjustment value display.
Display
key once more, the display will return
Adjustment
item name
[MORG]
[UPOS]
[DPOS]
2089B
Adjustment
value
-20-20
degrees
-5-10
degrees
-5-10
degrees
Change the adjustment value
4
Confirm the adjustment value
5
6
If the adjustment value is different from the original value, the adjustment
value will flash.
(Adjustment item name)
Sewing machine reference position adjustment mode will be exited and
normal operation will be possible.
The display will return to the setting item name display.
NOTE:
S-7200C
Any changed settings will take effect after sewing
machine reference position adjustment mode has
been exited.
2090B 4161M
2091B
2092B
4206M
56
Page 66
6. SETTING THE DIP SWITCHES (G50 AND G10 OPERATION PANELS)
6. SETTING THE DIP SWITCHES
(G50 AND G10 OPERATION PANELS)
DANGER
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the face plate of the control box. Touching areas where high voltages are present can result in
severe injury.
1 Key protect settings ON/OFF Disables operation panel key operations. (*1)
2 Should always be set to OFF.
3 Should always be set to OFF.
4 Should always be set to OFF. (*2)
(*1) The disabled operations will vary depending on the ON/OFF settings. For details, refer to “4-11. Protection settings”
(P.32) or “5-7. Protection settings” (P.51).
(*2) If set to ON, operations using the treadle will be disabled, and so always be sure to set to OFF. If you set it to ON and
turn on the power, error code [E901] will be displayed on the operation panel.
57
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7. MECHANICAL DESCRIPTIONS
7. MECHANICAL DESCRIPTIONS
The mechanisms operate in the order of the numbers given in the illustrations.
* <number> and [number] indicates the flow of each operations given.
* (number) indicates part names only. (They do not represent the flow of operations.)
7-1. Upper shaft and needle bar mechanism
4338M
1. Pulley
2. Motor shaft
3. Upper shaft
4. Thread take-up crank
5. Needle bar crank
6. Needle bar crank rod assembly
7. Needle bar clamp
8. Needle bar
(1) Needle bar bush U
(2) Needle bar bush D
The needle bar is guided by needle bar bush U
(1) and needle bar bush D (2).
S-7200C
58
Page 68
7. MECHANICAL DESCRIPTIONS
7-2. Lower shaft and rotary hook mechanism
4339M
1. Pulley
2. Motor shaft
3. Joint assembly
4. Timing pulley U
5. Timing belt
6. Timing pulley D
7. Lower shaft
8. Lower shaft gear
9. Rotary hook shaft gear
10. Rotary hook shaft
11. Rotary hook assembly
59
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7-3. Feed mechanism
Feed dog up/down movement
7. MECHANICAL DESCRIPTIONS
4340M
Feed dog forward/back movement
1. Pulley
2. Upper shaft
3. Lower shaft
(Feed dog up/down movement) (Feed dog forward/back movement)
<4> Feed lifting eccentric wheel assembly 4. Level feed eccentric wheel assembly
<5> Feed lifting feed shaft assembly 5. Level feed connecting rod
<6> Feed bar 6. Feed regulator assembly
7. Feed rock shaft
8. Feed rock bracket arm
9. Feed bar shaft assembly
10. Feed bar
11. Feed dog
*The feed locus for -[][]S specifications
is different from -[][]3 and -[][]5
specifications.
4341M
S-7200C
60
Page 70
7. MECHANICAL DESCRIPTIONS
7-4. Quick reverse mechanism (quick back mechanism)
7-5. Lubrication mechanism (thread take-up and rotary hook)
This sewing machine’s lubrication mechanism is a dry head type using tank lubrication.
The oil level can be checked in the oil gauge window without needing to tilt back the machine head or operate the sewing
machine.
Thread take-up minimum lubrication
To upper shaft, thread take-up and needle bar, etc. (-[]0[] specifications)
1. Oil feeding pocket
2. Oil tank
3. To upper shaft, thread take-up
and needle bar, etc.
4. Sub tank
(1) Oil gauge window
(2) Upper reference line
(3) Oil gauge
(4) Lower reference line
To rotary hook and rotary hook shaft (-[]0[], -[]3[] specifications)
1. Oil feeding pocket
2. Oil tank
3. To rotary hook and rotary hook shaft
4. Remaining return oil
5. Sub tank
(1) Oil gauge window
(2) Upper reference line
(3) Oil gauge
(4) Lower reference line
(5) Plunger pump
4343M
* Fine adjustments can be made to the lubrication amount for the rotary hook using the adjustment screw.
(Refer to “10-19. Adjusting the rotary hook lubrication amount (-[]0[], []3[] specifications)”.)
The illustration below shows the mechanism with the high-speed rotary hook removed.
1) When thread rimming signal is input
1. Solenoid plunger
2. Solenoid lever
3. Thread trimmer cam lever shaft
4. Roller (Moves to above (1))
(1) Thread trimmer cam
2) Rocking of movable knife holder
1. Thread trimmer cam
2. Roller
3. Slide block
4. Forked shaft
5. Thread trimmer lever
6. Thread trimmer connecting rod
7. Movable knife holder
8. Movable knife
4345M
63
S-7200C
4346M
Page 73
3) Thread trimming complete and operation stopped
7. MECHANICAL DESCRIPTIONS
1. Extension spring <1> Thread trimmer lever [1] Thread trimmer lever
2. Thread trimmer cam lever <2> Thread trimmer connecting rod [2] Forked shaft
3. Solenoid lever <3> Thread trimmer holder [3] Slide block
4.
Solenoid plunger <4> Movable knife [4] Roller
4) Thread trimming safety device
If the movable knife does not return to its original position, the operation shown in the illustration below ensures that the
movable knife will return to a position where it will not touch the needle.
1. Thread trimmer cam
2. Return roller
3. Slide block
4. Forked shaft
5. Thread trimmer lever
6. Thread trimmer connecting rod
7. Thread trimmer holder
8.
Movable knife
4347M
S-7200C
4348M
64
Page 74
7. MECHANICAL DESCRIPTIONS
7-6-2.
Upper and lower thread trimming sequence
Movable
knife
1. The needle rises 1.8 mm from its lowest position and the
rotary hook tip catches the loop made by the needle.
(For heavy-weight materials, it rises 2.2 mm.)
2. The thread trimming signal turns on and the thread
trimming cam moves the movable knife. The upper
thread is held by the rotary hook, and it passes
underneath the inner rotary hook.
1644M 1643M
Movable
knife
Lower
thread
Fixed
knife
Upper thread
Movable
knife
Lower
thread finger
1645M 1646M
3. The tip of the movable knife pierces the middle of the triangular loop formed underneath the needle plate by the tip of the
rotary hook as shown in the illustration, and the upper and lower threads are separated. At this time, the thread take-up is
slightly higher than its lowest position. (approximately 330° of angular rotation of the upper shaft)
* If the timing for this is too fast, it will affect the separation of the threads by the movable knife, and thread trimming
errors may occur.
Fixed
knife
Lower
thread
Upper thread
1647M
4. The upper and lower threads being held by the movable knife in step 3 are spread out gradually by the spread knives
and the lower thread finger and are cut by the tip of the fixed knife. At this time the thread take-up reaches to about its
highest position.
When the knives are spreading the threads, the tension release is activated at the same time so that the upper thread is
fed out smoothly and excessive force is not applied to the upper thread. The amount of thread which is held by the
movable knife is the trailing length of upper thread from the needle after thread trimming and the length of lower thread
trailing out from the bobbin case, and these amounts affect the formation of the seam at the next sewing start.
(The illustration shows the fixed knife removed.)
Movable
knife
Lower
thread
finger
1648M
65
S-7200C
Page 75
7-7. Tension release mechanism
7. MECHANICAL DESCRIPTIONS
4349M
When the thread trimming signal turns off,
parts such as the solenoid lever [2] and the
tension release wire [3] return to their original
positions.
When the presser foot is lowered, the
presser bar lifter lever spring (2)
causes the tension release plate 9 to
return.
(Presser foot is raised using the
knee lifter plate (1))
1. Knee lifter <1> Presser bar lifter lever [1] Thread trimmer solenoid
2. Knee lifter connecting rod [2] Solenoid lever
3. Knee lifter R [3] Tension release wire
4. Knee lifter complying bar
5. Knee lifter bar
6. Knee lifter lever
7. Knee lifter connecting rod
8. Presser bar lifter lever
9. Tension release plate
10. Tension release stud
11. Tension release pin
12. Tension disc presser
13. Tension disc (Lifts up)
(1) Knee lifter plate
(2) Presser bar lifter lever spring
(Presser foot is raised using the lifting lever)
(Thread trimming signal is input)
S-7200C
66
Page 76
7. MECHANICAL DESCRIPTIONS
7-8. Thread wiper mechanism (option device)
(Thread wiper signal is input)
1. Thread wiper solenoid
2. Thread wiper rod
3. Thread wiper crank assembly
4. Thread wiper
(Thread wiper signal is turned off)
<1> Thread wiper spring
<2> Thread wiper solenoid (Returns)
4350M
67
S-7200C
Page 77
8. DISASSEMBLY
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the cover of the control box. Touching areas where high voltages are present can result in severe
injury.
8. DISASSEMBLY
DANGER
CAUTION
Disassembly should only be carried out by a
qualified technician.
Turn off the power switch before carrying out
disassembly. If the treadle is depressed by mistake,
the sewing machine might start operating and injury
could result.
Use both hands to hold the machine head when
tilting it back or returning it to its original position.
If only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
Be sure to wear protective goggles and gloves when
handling the lubricating oil and grease, so that they
do not get into your eyes or onto your skin,
otherwise inflammation can result.
Furthermore, do not drink the oil or eat the grease
under any circumstances, as they can cause
vomiting and diarrhea.
Keep the oil out of the reach of children.
Any problems in machine operation which result
from unauthorized modifications to the machine will
not be covered by the warranty.
Dissemble the parts in the order shown in the illustration.
* (number) indicates part names only. (It does not indicate the disassembly order.)
8-1. Knee lifter assembly
1. Bolt (Loosen)
2. Knee lifter bracket
4373M
S-7200C
68
Page 78
8. DISASSEMBLY
8-2. Cable tie
1. Cable tie (Cut)
2. Cable tie (Cut)
3. Cable tie (Cut)
4. Cable tie (Cut)
4374M
8-3. Connector
1. Head detector unit connector
2. Operation panel connector
3. Resolver connector
4. Connector
5. Motor connector
6. Pins
(1) Connector
4375M
When pulling out the pin from the connector, use
a pin puller manufactured by Molex (model no.
570316000).
69
S-7200C
Page 79
8-4. Operation panel and head detector unit
8. DISASSEMBLY
1. Screw [2 pcs]
2. Operation panel
3. Screw [6 pcs]
4. Side plate
5. Screw [3 pcs] (Loosen)
6. Screw [2 pcs]
7. Head detector unit
8. Cord [2 pcs]
4376M
S-7200C
70
Page 80
8. DISASSEMBLY
8-5. Covers and bobbin winder unit
1. Screw [3 pcs]
2. Face plate assembly
3. Screw [5 pcs]
4. Motor cover
5. Screw
6. Cord holder
7. Bobbin winder fixed screw [3 pcs]
8. Bobbin winder unit
71
4377M
S-7200C
Page 81
8-6. Tension release wire and thread trimmer solenoid
8. DISASSEMBLY
1. Screw
2. Tension release wire
3. Screw
4. Wire holder D
5. Screw
6. Cord holder plate
7. Screw [3 pcs]
8. Thread trimmer solenoid
9. Tension release wire (Remove from tension release plate)
10. Screw
11. Wire holder U
12. Tension release wire (Pull out)
S-7200C
4378M
72
Page 82
8. DISASSEMBLY
8-7. Wick holder and oil tube (-[]0[] specifications)
1. Wick (Unite the knot)
2. Screw
3. Wick holder
4. Screw
5. Cord holder
6. Vinyl tube (Remove from wire code holder)
7. Vinyl tube (Pull out)
4379M
73
S-7200C
Page 83
8-8. Oil tank, bed bottom cover and sub tank
-[]0[]、[]3[]
specifications
only
-[]0[], []3[] specifications only
1. Screw
2. Screw
3. Sub tank assembly (Pull out)
4. Vinyl tube (Pull out)
5. Vinyl tube (Pull out)
6. Screw [2 pcs]
7. Oil tank
8. Screw [9 pcs]
9. Bed bottom cover
(1) Lubricating oil
1) Hold a dish under the lubricating oil drain hole, and then
remove the screw to drain out the lubricating oil (1).
2) Install the screw to the lubricating oil drain hole.
8. DISASSEMBLY
4380M
S-7200C
74
Page 84
8. DISASSEMBLY
8-9. Stand
1. Stand L [2 pcs]
2. Stand R [2 pcs]
4381M
8-10. Safety switch and quick reverse solenoid
1. Screw
2. Tube holder
3. Vinyl tube (Pull out)
4. Screw
5. Washer
6. Safety switch
7. Screw [2 pcs]
8. Quick reverse solenoid
4382M
75
S-7200C
Page 85
8-11. Needle, presser foot and R-actuator
Integrated finger guard type
8. DISASSEMBLY
1. Set screw
2. Needle
3. Screw
4. Finger guard
5. Presser foot
6. Screw [2 pcs]
7. R-actuator
8-12. Thread tension mechanism
4383M
1. Pre-tension assembly
2. Thread guide
3. Screw
4. Arm thread guide R
5. Set screw
6. Thread tension bracket assembly
7. Tension release pin
8. Tension release stud
9. Screw
10. Needle bar thread guide
11. Thread guide D
12. Set screw
13. Bobbin winder tension assembly
S-7200C
4384M
76
Page 86
8. DISASSEMBLY
8-13. Needle plate, feed dog, etc.
1. Flat screw [2 pcs]
2. Needle plate
3. Slide plate
4. Screw [2 pcs]
5. Feed dog
6. Screw
7. Ruler plate
4385M
77
S-7200C
Page 87
8. DISASSEMBLY
8-14. Bobbin case, rotary hook and thread trimmer mechanism
1. Screw
2. Hook stopper
3. Bobbin case
4. Set screw [3 pcs]
5. Rotary hook
6. Flat screw [3 pcs]
7. Knife holder presser plate
8. Thread trimmer lever spring (Remove from hole)
9. Screw (Loosen)
10. Thread trimmer lever assembly
11. Thread trimmer lever spring (Remove)
12. Set screw (Loosen)
13. Retaining ring E
14. Thread trimmer cam lever shaft (Pull out)
15. Cushion
16. Washer
17. Thread trimmer lever assembly
18. Extension spring
19. Collar
20. Rubber cushion
21. Forked shaft (Pull out)
S-7200C
4386M
78
Page 88
8. DISASSEMBLY
8-15. Feed bar mechanism
1. Set screw (Loosen)
2. Feed lifting rock bar shaft
3. Screw [2 pcs] (Loosen)
4. Feed bar assembly (Open)
5. Set screw [2 pcs] (Loosen)
6. Feed lifting eccentric wheel assembly
4387M
8-16. Feed rock shaft
1. Rubber cap
2. Screw (Loosen)
3. Feed rock arm (Open)
4. Set screw [2 pcs] (Loosen)
5. Feed rock shaft (Pull out)
6. Washer
4388M
79
S-7200C
Page 89
8-17. Presser foot mechanism
8. DISASSEMBLY
1. Presser adjusting screw
2. Spring guide
3. Presser bar spring
4. Washer
5. Screw
6. Thread guide presser bar bracket
7. Screw
8. Presser bar guide bracket
9. Presser bar (Pull upward)
10. Retaining ring E
11. Presser bar lifter lever spring
12. Set screw
13. Presser bar lifter lever shaft (Slide to the right)
14. Retaining ring E
15. Presser bar lifter lever shaft (Pull out)
16. Washer
17. Tension release plate
4389M
S-7200C
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Page 90
8. DISASSEMBLY
8-18. Knee lifter lever mechanism
1. Shoulder screw
2. Knee lifter bar (Pull out)
3. Shoulder screw
4. Presser bar lifter lever assembly (Remove in the direction of the allow)
5. Shoulder screw
6. Knee lifter lever
4390M
8-19. Tension pulley
1. Bolt [2 pcs]
2. Tension pulley unit
4391M
81
S-7200C
Page 91
8-20. Needle bar and thread take-up mechanism
8. DISASSEMBLY
1. Rubber cap
2. Rubber cap [2 pcs]
3. Rubber cap
4. Rubber cap [2 pcs]
5. Rubber cap
6. Screw (Loosen)
7. Needle bar
8. Needle bar clamp
9. Needle bar guide slide block
10. Set screw (Loosen)
11. Needle bar bush U
12. Set screw [3 pcs] (Loosen)
13. Needle bar crank
14. Set screw [2 pcs] (Loosen)
15. Thread take-up lever assembly
16. Washer
4392M
S-7200C
82
Page 92
8. DISASSEMBLY
8-21. Pulley and motor
1. Screw [3 pcs]
2. Pulley washer [3 pcs]
3. Pulley
4. Screw [3 pcs]
5. Screw
6. Ground wire
7. Set screw [Two at motor side] (Loosen)
8. Motor (Pull out)
(1) Screw
(2) Motor
(a) Screw hole
If the motor will not pull out …
1) Insert the two screws (1) which were removed from the end
of the motor into the screw holes (a) and tighten them.
The motor (2) will lift up and be easier to remove.
NOTE:
Tighten the left and right screws little by little and evenly.
2) Once the motor (2) can be removed, remove the screws (1).
4393M
83
S-7200C
Page 93
8-22. Timing belt
1. Timing belt (Remove from timing pulley D)
2. Screw [3 pcs]
3. Fan
4. Flange
5. Timing belt (Remove from arm)
8. DISASSEMBLY
4394M
8-23. Feed mechanism (1)
1. Spring assembly
2. Retaining ring C
3. Washer
4. Pin
5. Quick reverse solenoid plunger
4403M
S-7200C
84
Page 94
8. DISASSEMBLY
8-24. Feed mechanism (2)
1. Set screw (Loosen)
2. Eccentric pin
3. Set screw (Loosen)
4. Set screw (Loosen)
5. Solenoid lever assembly
6. Dial lock lever (Raise)
7. Stitch length dial (Turn to the left and remove)
8. Positioning pin
9. Notch spring
10. Set screw [2 pcs] (Loosen)
11. Feed regulator shaft
12. Washer
13. Feed regulator assembly
85
S-7200C
4395M
Page 95
8-25. Feed mechanism (3)
8. DISASSEMBLY
1. Set screw [2 pcs] (Loosen)
2. Set screw [2 pcs] (Loosen)
3. Feed regulator shaft (Pull out)
4. Spring hook arm assembly
5. Rubber cap
6. Rubber cap
7. Set screw [3 pcs] (Loosen)
8. Feed regulator support shaft
9. Feed regulator shaft L
10. Feed regulator assembly (Only the top can be removed)
S-7200C
4396M
86
Page 96
8. DISASSEMBLY
8-26. Lower shaft, lower shaft gear and feed regulator unit
Wait at least 5 minutes after turning off the power switch and disconnecting the power cord from the wall outlet
before opening the cover of the control box. Touching areas where high voltages are present can result in severe
injury.
CAUTION
Assembly should only be carried out by a qualified
technician.
Turn off the power switch before carrying out
assembly. If the treadle is depressed by mistake,
the sewing machine might start operating and injury
could result.
If the power switch needs to be left on when carrying
out some adjustment, be extremely careful to
observe all safety precautions.
Use both hands to hold the machine head when
tilting it back or returning it to its original position.
If only one hand is used, the weight of the machine
head may cause your hand to slip, and your hand
may get caught.
Be sure to wear protective goggles and gloves when
handling the lubricating oil and grease, so that they
do not get into your eyes or onto your skin,
otherwise inflammation can result.
Furthermore, do not drink the oil or eat the grease
under any circumstances, as they can cause
vomiting and diarrhea.
Keep the oil out of the reach of children.
Use only the proper replacement parts as specified
by Brother.
If any safety devices have been removed, be
absolutely sure to re-install them to their original
positions and check that they operate correctly
before using the machine.
Any problems in machine operation which result
from unauthorized modifications to the machine will
not be covered by the warranty.
89
S-7200C
Page 99
9. ASSEMBLY
w
Assemble each part in the order shown in the illustration.
Apply grease to the places marked with white arrows in the illustrations.
■
Use the “Grease kit (SA8837-001)” specified by Brother for the grease.
Using the tube
9-1. Stitch length dial and feed regulator mechanism
4087M
With the positioning pin (a) set into the
groove of the dial lock lever (b), scre
in the stitch length dial (7).
1. Feed regulator assembly
2. Washer
3. Feed regulator shaft
4. Set screw [2 pcs] (Tighten)
5. Notch spring
6. Positioning pin
7. Stitch length dial (Screw in)
4405M
S-7200C
90
Page 100
9. ASSEMBLY
9-2. Reverse lever
1. Handle shaft support
2. Reverse lever assembly
3. Screw [2 pcs]
4. Socket bolt (Tighten)
5. Spring (Attach to pin (a))
4406M
91
S-7200C
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