Baoyu GT-288E User manual

Safety Instruction
1. Users are required to read the operation manual completely and carefully before installation or
operation.
2. The product should be installed and pre-operated by well-trained persons. All power supplies
must be turned off during the installation work, remember not to operate with power on.
3. All the instruction marked with sign must be observed or executed; otherwise, bodily
injuries might occur.
4. For perfect operation and safety, it is prohibited that using extension cable with multi-outlet
for power connection.
5. When connecting the power cord, it must be determined that the operating voltage conforms
to the rated voltage value specified in the product identification.
6. Don＇t operate in direct sun light，outdoors area and where the room temperature is over 45°C
or below 0°C.
7. Please avoid operating near the heater at dew area or at the humidity below 10% or above
90%.
8. Don＇t operate in area with heavy dust, corrosive substance or volatile gas.
9. Avoid power cord being applied by heavy objects or excessive force, or over bend.
10. The earth wire of power cord must be connected to the system ground of the production plant
by proper size of conductions and terminals. This connection should be fixed permanently.
11. All the moving portions must be prevented to be exposed by the parts provided.
12. Turing on the machine in the first time, operate the sewing machine at low speed and check
the correct rotation direction.
13. Turn off the power before the following operation:
1. Connecting or disconnecting any connectors on the control box or motor.
2. Threading needle.
3. Raising the machine head.
4. Repairing or doing any mechanical adjustment.
5. Machines idling.
14. Repairs and high level maintenance work should only be carried out by electronic technicians
with appropriate training.
15. All the spare parts for repair must be provided or approved by the manufacturer.
16. Don’t use any objects or force to hit or ram the product.
Guarantee Time
Warranty period of this product is 1 year dated from purchasing, or within 2 years from
ex-factory date.
Warranty Detail
Any trouble found within warranty period under normal operation, it will be repaired free of
charge. However, maintenance cost will be charged in the following cases even if within
warranty period:
1. Inappropriate use, including: wrong connecting high voltage, wrong application,
disassemble, repair, modification by incompetent personnel, or operation without the
precaution, or operation out of its specification range, or inserting other objects or liquids
into the product.
2. Damage by fire, Earth quake, lighting, wind, flood, salt corrosive, moisture, abnormal
power voltage and any other damage cause by the natural disaster or by the inappropriate
environments.
3. Dropping after purchasing or damage in transportation by customer himself or by
customer’s shipping agency
* We make our best effort to test and manufacture the product for assuring the quality.
However, it is possible that this product can be damaged due to external magnetic
interference and electronic static or noise or unstable power source more than expected;
therefore the grounding system of operate area must guarantee the good earth and it’s also
recommended to install a failsafe device (Such as residual current breaker).

1 Button Displays and Operating Instructions
1.1 Key Description
Name key Indicate
Function Parameter
Edit
If click, enter or exit the user parameter setting interface.
If long-press, it will switch to the password input interface. Enter the correct password,
press S key to confirm, you can enter the advanced parameter setting interface.
Setting Parameter
Check and Save
For the content of the selected parameters check and save: after select parameter press
this key to check and modify operation, after modified parameter value press this key
to exit and save the parameter.
Parameter Increase
If click, increase the parameter.
If long-press, continuously Increase the parameter.
Parameter
Decrease
If click, decrease the parameter.
If long-press, continuously decrease the parameter.
Reset Long-press can restore factory setting.
Start Back-tacking
Selection / Slow
Launch Setting
If click, switch AB start back-tacking
→
ABAB start back-tacking
→
function off
→
B
start back-tacking successively.
If long-press, set used or cancelled slow launch function.
End Back-tacking
Selection / Needle
Stop Position
Selection
If click, switch CD end back-tacking
→
CDCD end back-tacking
→
function off
→
C end
back-tacking successively.
If long-press, the needle stop position after shift the sewing mode (up position / down
position).
Free Sewing /
Constant Stitch
Sewing
If click, set to free sewing mode.
If long-press, set to constant stitch sewing mode.
Consecutive
Reverse Sewing /
Multi-segment
Sewing
If click, set to consecutive reverse sewing mode.
If long-press, set to multi-segment sewing mode (switch to four-segment sewing,
seven-segment sewing, eight-segment sewing, and fifteen-segment sewing in
sequence).
Presser Foot
Lifting Setting /
Auto Function
If click, switch function off
→
automatic presser foot lifting after trimming
→
automatic
presser foot lifting after pause→full function successively.
If long-press, set used or cancelled auto function.
Trimming Setting /
Clamp Function
Setting
If click, set used or cancelled trimming function.
If long-press, set used or cancelled clamp function.
Pattern Freedom
Sewing Setting
If click, switch to pattern freedom sewing mode selection interface.
If long-press, switch to pattern freedom sewing mode editing interface.
Tight Seam Setting
If click, switch starting tight seam, ending tight seam, full function and function off
successively.
If long-press, switch to tight seam mode editing interface.
Pattern
Backing-tacking
Setting
If click, set used or cancelled pattern backing-tacking function.
If long-press, switch to pattern backing-tacking mode editing interface.
Pattern
Constant-stitch
Sewing Setting
In multi-segment sewing mode, if click, set used or cancelled pattern constant-stitch
sewing function.
In multi-segment sewing mode, if long-press, switch to pattern constant-stitch sewing
mode editing interface.
Stitch Length
Setting
If click, increase or decrease stitch length.
If long-press, continuously increase or decrease stitch length.

1.2 Auxiliary Function
1.2.1 Debugging Mode
On the main interface, long-press S key to enter to the debugging parameter interface. P92 correct the
electrical angle of motor, P72 up needle position adjustment, P129 back-tacking step motor zero-point correction,
P74 tacking stitch length compensation and P75 back-tacking stitch length compensation parameter setting.
1.2.2 Tight Seam Mode Editing
On the main interface, long-press tight seam key to display "F-1" (start back-tacking), and press the 4th
column , to switch between "F-1" (start back-tacking) and "d-2" (end back-tacking), press S to
confirm, switch to the editing interface "01 0 0.5", press the 1st or 2nd column , to adjust the number
of stitches of 00-12, press the 4th column , to adjust 0 ( Normal sewing) -1 (reverse sewing). Press
to adjust the stitch length. After the setting is completed, press S key to confirm. Click P key to exit
to the main interface.
1.2.3 Pattern Freedom Sewing Mode
On the main interface short-press to shift pattern freedom sewing mode selection interface "n1"，
press to adjust n1-n9.
1.2.4 Pattern Freedom Sewing Editing
On the main interface long-press to shift pattern freedom sewing mode editing interface“n-01 01”，
short-press the 4th column , to adjust n01-n09, short-press adjust 01-10 segment number,
adjust to setting pattern number, segment number, short-press S key to confirm, shift to corresponding pattern
number editing interface“01 1 3.0”， short press 1st column or 2nd column , to adjust 00-99 stitches,
short-press 4th column , 1-9 repeat times, short-press to adjust needle distance, after
finished setting short-press S key to confirm. Press P key can exit to interface.
1.2.5 Pattern Backing-tacking Sewing Editing
On the main interface, long press to switch the pattern style editing interface "H-01 01", press the 4th
column , to adjust the H01-H09 pattern number, and short press to adjust the 01-10
segment number, segment number, short press S key to confirm, switch to the corresponding pattern number
editing interface "01 1 3.0", press the 1st or 2nd column , to adjust the number of 00-99 stitches, press
the 4th column , to adjust Repeat 1-9 times, press to adjust the stitch length. After the

setting is completed, press the S key to confirm. Short press P key to exit to the main interface.
1.2.6 Pattern Constant-stitch Sewing Editing
In the multi-segment sewing mode, long-press pattern constant-stitch sewing key on the main interface to
switch to pattern constant-stitch sewing editing interface "d-01 3.0", press the fourth column , to
adjust the d01-d15 segment number, and press to adjust the current segment Stitch length. Short press
P key to exit to the main interface.
2 User Parameter
No.
Items
Range
Default
Description
P01 Maximum sewing speed (rpm) 100-3700
3700
Maximum speed of machine sewing
P02 Set accelerated curve (%) 10-100 80
Set the acceleration slope
The greater the slope value, the steeper the speed; the smaller the
slope value, the slower the speed
P03 Needle UP/ DOWN UP/DN DN UP: Needle stops at up position
DN: Needle stops at down position
P04 Start back-tacking speed (rpm) 200-3200 2200
P05
End back-tacking speed (rpm )
200-3200
2200
P06
Bar-tacking speed (rpm)
200-3200
2200
P07
Soft start speed (rpm )
200-1500
1500
P08
Stitch numbers for soft start
1-15
2
P09
Automatic constant-stitch
sewing speed (rpm)
200-4000 3700 Speed adjustment for automatic constant-stitch sewing
P10
Automatic end back-tacking
sewing after constant-stitch
sewing
ON/OFF ON
ON: After executing the constant-stitch sewing, the back-tacking
sewing will be executed automatically. In any sewing mode,
mending stitch function cannot be used.
OFF: After executing the last constant-stitch sewing, the
back-tacking sewing function will not be automatically executed,
and the front step or full back step must be performed again.
P12 Start back-tacking running
mode selection 0-1 1
0: Controlled by foot pedal, can be stopped and started at will
1: Touch the foot pedal to automatically execute back-tacking
action
P13 Ending mode of start
back-tacking CON/STP CON
CON: Start back-tacking is completed automatically continued for
next action.
STP: After the number of stitches is completed, stop automatically.
P14 Slow start function selection ON/OFF OFF
P15 Manual Switch A 0-6 5
0: OFF
1: half stitch
2: one stitch
3: continuous half stitch
4: continuous one stitch
5: Back-tacking when machine stop or pause
6: Tight seam function
P16 Speed limit of manual
back-tacking
0-3200 0 The function is disabled when the value is less than 100.

No.
Items
Range
Default
Description
P17-N04 Language setting 0-6 1
0: OFF
1: Chinese
2: English
3: Vietnamese
4: Portuguese
5: Turkish
6: Spanish
P17-N05 Voice broadcast selection 0-3 1
0: No key tone, no error voice
1: With key tone and error voice
2: Key tone only
3: Error voice only
P17-N06
Automatic piece counting
function
0-50 1
0: OFF
1-50: Trimming counting times setting
P17-N12 Boot counter interface
selection
0-1 0 0: OFF
1: ON
P17-N13
Automatic piece counting
mode selection
0-1 0
0: Incremental piecework mode
1: Diminishing piecework mode
P18 Start back-tacking
compensation 1 0-200 158
Stitch compensation for start back-tacking A section, 0~200 action
gradually delay; The large value, the longer of the A section last
stitch, and the shorter of the B section first stitch.
P19 Start back-tacking
compensation 2 0-200 158
Stitch compensation for start back-tacking A section, 0~200 action
gradually delay; The large value, the longer of the B section last
stitch.
P21
The position of the pedal for
accelerating
30-1000 520
P22 The position of the pedal for
the stop
30-1000 420
P23
The position of the pedal for
presser foot lifting
30-1000 270
P24 The position of the pedal for
thread trimming 30-500 130
P25 End back-tacking
compensation 3 0-200 158
Stitch compensation for end back-tacking C section, 0~200 action
gradually delay; The large value, the shorter of the C section first
stitch.
P26 End back-tacking
compensation 4 0-200 158
Stitch compensation for end back-tacking D section,0~200 action
gradually delay; the large value, the longer of the C section last
stitch, and the shorter of the D section first stitch.
P29
The strength of thread
trimming stop 1-45 20
P32 Bar-tacking compensation 5 0-200 158
Stitch compensation for bar-tacking A (C) section, 0~200 action
gradually delay; the large value, the longer of the A (C) section last
stitch; the shorter of the B (D) section first stitch.
P33 Bar-tacking compensation 6 0-200 158
Stitch compensation for bar-tacking B (D) section, 0~200 action
gradually delay; the large value, the longer of the B (D) section last
stitch; the shorter of the C section first stitch.
P34 Constant-stitch sewing
running mode selection A/M A
A: Touch the foot pedal to automatically execute constant-stitch
sewing action
M: Controlled by foot pedal, can be stopped and started at will
P35
Thread tension releasing
function setting when presser
foot lifting action
0-2 0
0: OFF
1: Thread tension releasing output function ON when presser foot
lifting, thread tension releasing output function OFF when stopover
2: Full function

No.
Items
Range
Default
Description
P36 Thread tension releasing
function selection 0-1 1 0: OFF
1: ON
P37
Thread wiping function /
Thread clamping function
selection
0-11 8
0 : OFF
1: Thread wiping function.
2-11: Thread clamping Function and the strength of automatic
thread clamping.
P38
Automatic thread trimming
function selection
ON/OFF ON
P39 Automatic presser foot lifting
when pause function selection
UP/DN DN
P40
Automatic presser foot lifting
after trimming function
selection
UP/DN DN
P41 Thread trimming counter
display
0-9999 0 Display the quantity of finished sewing piece.
Long-press “-” key
to clear the count
P42-N01 The control system version
number
P42-N02 The panel version number
P42-N03 Speed
P42-N04 The pedal AD
P42-N05 The mechanical angle(up
position)
P42-N07 Bus bar voltage AD
P42-N15 Step drive version number
P43 Motor rotation direction
setting CCW/CW CCW CW: clockwise
CCW: counter clock wise
P44 Brake strength during stopover 1-45 16
P45 Pattern freedom sewing mode
selection 0-1 0
0: Controlled by foot pedal, can be stopped and started at will
1: Touch the foot pedal to automatically execute a pattern sewing
action
P46
Motor stop with a reverse
angle after trimming function
ON/OFF OFF
P47 Adjust the reverse angle when
motor stop after trimming
10-50 40 Start from the upper needle position and adjust the angle of the
needle lift in reverse operation after trimming.
P48
The minimum speed
(positioning speed) (rpm ) 100-500 210 Adjust the minimum speed
P49 Thread trimming speed (rpm) 100-500 300 Adjust thread trimming speed
P50
Foot lifter operation time to
full output (ms) 10-990 200
P51 Presser foot lifter operation
duty cycle (%)
1-50 38 Presser foot lifter operate in duty cycle to save electricity and
protect the electromagnet from over-heat.
P52
Delay the start of the motor to
protect the lowering time of
presser foot (ms)
10-990 120 Delay the start time, with automatic presser foot down.
P53 Half back pedaling lifting
presser foot function to cancel 0-2 1
0: OFF
1: Back pedaling and half back pedaling with lifting presser foot
2: Half back pedaling without lifting presser foot, back pedaling
with lifting presser foot

No.
Items
Range
Default
Description
P54
Thread trimming action time
(ms)
10-990 200
P55
Thread wiping action time
(ms) 10-990 10
P56 Power on and positioning 0-2 0 0: Always not to find the up needle position
1: Always to find the up needle position
P57
Presser foot solenoid
protection time (s)
1-60 5
Forced shutdown after hold time to prevent the electromagnet from
being hot for a long time
P58 Up needle position adjustment 0-359 90
Up position adjustment, the needle will advance stop when the
value decreased, the needle will delay stop when the value
increased.
P59 Down needle position
adjustment 0-359 270
Down position adjustment, the needle will advance stop when the
value decreased, the needle will delay stop when the value
increased.
P60 Testing speed (rpm ) 100-3700 3500 Setting testing speed.
P61 Testing A ON/OFF OFF Continuous running testing.
P62 Testing B ON/OFF OFF Start and stop testing with all functions.
P63 Testing C ON/OFF OFF Start and stop testing without all function.
P64 Test run time 1-250 30
P65 Test stop time 1-250 10
P66
Machine protection switch
selection
0-1 1
0: Disable
1: Testing zero signal
P69 Pattern freedom sewing speed 100-3000 2000
P70 Type
P71 Correction stitches distance of
manual button A 0-5.0 0
P72 Up needle position adjustment 0-359
Adjust up needle position, the displayed value will change with the
position of the handwheel, press "S" key to save the current
position (value) as up needle position.
P73 Down needle position
adjustment 0-359
Adjust down needle position, the displayed value will change with
the position of the handwheel, press "S" key to save the current
position (value) as down needle position.
P74
Tacking stitch length
compensation -50~50 0
P75
Back-tacking stitch length
compensation
-50~50 0
P77
Opportunity point of
back-tacking for end
back-tacking in high speed in
free sewing mode
0-350 130
P78
The start angle of thread
clamping
5-359 100
P79 The stop angle of thread
clamping
5-359 270

No.
Items
Range
Default
Description
P80 Trimming engage angle 0-359 5
P81 Presser foot release buffer
working time (ms) 0-800 60
P83 Stopping strength after
trimming
10-100 20
P84 Trimming full output
time (ms) 10-990 60
P85 Periodic signal of trimming
output (*10%) 1-10 7
P86 Up and down needle position
distance
15-345 180 Up and down positioning distance angle (1 degree for every 4
values)
P87 Wiping thread return delay
time
10-990 50 Make sure the wiper returns to its original position
P88 Stopover distance 10-100 30
P89 AC overvoltage setting 500-1023 880
P90 Soft start first stitch speed 200-1500 400
P91 Soft start second stitch speed 200-1500 1000
P92 Correct the electrical angle of
motor
160
Reading the initial Angle of encoder, the factory default was set,
please do not change the values (parameter value cannot be
changed manually, random change it will result the control box and
motor abnormal or damaged).
P93 The starting time of the half
back pedaling function (ms)
10-900 100
P95 Periodic signal of the presser
foot first output action (%) 10-100 100
P99 Starting tight seam stitch
length
0-5.0 0.5
P100 Direction of starting tight
seam
0-1 0
P101 The start angle of thread
tension releasing
1-359 30 Thread tension releasing start angle (defined as 0°under
calculation)
P102 The stop angle of thread
tension releasing
1-359 180 Thread tension releasing end angle (defined as 0°under calculation,
must be greater than P101 parameter value)
P103 Thread tension releasing
strength
1-5 3
P105 Pattern freedom sewing mode
selection
0-9 0 0: OFF
1-9: Pattern freedom sewing mode
P107 Starting tight seam speed 100-1200 500
P108 Starting tight seam stitch
number
0-12 1
P109 The delay time before thread
wiping
5-990 5 Interval time before entering thread wiping action after finding the
upper positioning
P110 Trimming back time (ms) 60-990 65 Make sure the thread trimming device returns to its original

No.
Items
Range
Default
Description
position
P111 Clamp function without any
thrum switch
0-1 0
P112
The delay time before hook
thread with clamp function
without any thrum
0-990 100
P113
The hook thread action time
with clamp function without
any thrum
0-990 90
P114
The return back time of hook
thread with clamp function
without any thrum
0-990 30
P115
Duty cycle for hook thread
with clamp function without
any thrum
0-100 80
P116 The suction time for clamp
function without any thrum
0-5000 1000
P117
Duty cycle for pull thread with
clamp function without any
thrum
0-100 80
P118
Function selection of manual
back-tacking button in pattern
mode
0-1 0
P129 Back-tacking step motor
zero-point correction
-500~500 0
P131 Normal stitch length 0-5.0 3.0
P132 Manual close stitches distance 0-5.0 2.0
P138 Foot lifting release buffer duty
cycle (%) 0-100 10
P139 Foot lifting release buffer
delay time (ms) 0-200 35
P143 Tight seam mode selection 0-3 0
0: OFF
1: Starting tight seam
2: Ending tight seam
3: Full function
P144 Tacking stitch length
compensation in high speed -50～50 -20
P145 Back-tacking stitch length
compensation in high speed -50～50 -20
P153 Ending tight seam stitch length 0-5.0 0.5
P154
Ending tight seam speed 100-1200 1000
P159 Direction of ending tight seam 0-1 0 0: Forward
1: Backward
P160 Ending tight seam stitch 0-12 1

No.
Items
Range
Default
Description
number
P165 Stitch counter mode selection 0-4 0
0: Do not count
1. Increase cycle count
2. Decrease cycle count
3. Increase count, alarm after the count is full, need to press the
clear key to start recounting
4. Decrease count, alarm after the count is full, need to press the
clear key to start recounting
P166 Upper limit of stitch counter
(stitch) *10
0-9999 500
P170 Correction stitches distance of
manual button B
0-5.0 0
P171 Correction stitches distance of
manual button C
0-5.0 0
P173 Correction stitches distance of
manual button D
0-5.0 0
P174 Manual Switch B 0-6 3
0: OFF
1: half stitch
2: one stitch
3: continuous half stitch
4: continuous one stitch
5: Back-tacking when machine stop or pause
6: Tight seam function
P175 Manual Switch C 0-6 0
0: OFF
1: half stitch
2: one stitch
3: continuous half stitch
4: continuous one stitch
5: Back-tacking when machine stop or pause
6: Tight seam function
P176 Manual Switch D 0-6 0
0: OFF
1: half stitch
2: one stitch
3: continuous half stitch
4: continuous one stitch
5: Back-tacking when machine stop or pause
6: Tight seam function
P177 1mm forward stitch length
reference value setting 0-2000
P178 1mm backward stitch length
reference value setting 0-2000
P179 2mm forward stitch length
reference value setting 0-2000

No.
Items
Range
Default
Description
P180 2mm backward stitch length
reference value setting 0-2000
P181 3mm forward stitch length
reference value setting 0-2000
P182 3mm backward stitch length
reference value setting 0-2000
P183 4mm forward stitch length
reference value setting 0-2000
P184 4mm backward stitch length
reference value setting 0-2000
P185 5mm forward stitch length
reference value setting 0-2000
P186 5mm backward stitch length
reference value setting 0-2000
P187 6mm forward stitch length
reference value setting 0-2000
P188 6mm backward stitch length
reference value setting 0-2000
P189 7mm forward stitch length
reference value setting 0-2000
P190 7mm backward stitch length
reference value setting 0-2000
Note: the initial value of parameters is for reference only, and the actual value of parameters is subject to the real object.
3 Error Code List
Error Code Problem description Solutions
E01 High voltage
1. Whether the grid voltage is higher than AC260V;
2. If it is self-generated power supply, please reduce the generator power;
3. If it still does not work normally, please replace the control box and notify the
after-sales service.
E02 Low voltage
1. Whether to connect to low voltage;
2. Reset;
3. If it still does not work normally, please replace the control box and notify the
after-sales service.
E03 CPU communication abnormal
1. Turn off the system power and check whether the connection of the display
screen is loose or disconnected, restart the system after returning it to normal.
2. Turn off the system power, remove the control box and only plug in the
power cord to power on, whether alarm E05, if it still alarms E03, replace the
control box and notify the after-sales service.
E05 Pedal signal abnormal
1. Check whether the pedal connector is loose or fall off, and restart the system
after returning it to normal.
2. If it still does not work normally, please replace the control box or speed
controller and notify the after-sales service.
E07 Main shaft motor locked-rotor 1. Turn off the power and check whether the handwheel can be turned

smoothly (turn the handwheel by hand), if it cannot be turned, please check the
machine;
2. Turn off the power, check whether the motor power connector is loose, plug it
in and restart it;
3. Check whether the upper needle stop position is correct, if not, please adjust
the upper positioning position;
4. If it still does not work normally, please replace the control box or spindle
motor and notify the after-sales service.
E10 Electromagnet overcurrent
1. Unplug the solenoid connector, if alarm E10, replace the control box and
notify the after-sales service.
2. If there is no alarm after removing the solenoid connector, please plug it back
in
1) Step on the front pedal to let the sewing machine perform thread clamping
and back-tacking. If alarms, please turn off start back-tacking and end
back-tacking, restart the control box, and then step forward. If alarms, please
turn off the thread clamping function and restart the electronic control, and step
forward again. If there is no alarm, replace the clamper.
2) Step on the front pedal to let the sewing machine perform thread clamping
and back-tacking. If it alarms, please turn off start back-tacking and end
back-tacking, restart the control box, and then step forward. If there is no alarm,
please turn off the thread clamping function and restart the control box, and
open start back-tacking function, step forward again, if it alarms, please replace
the back-tacking solenoid.
3) Step on the front pedal to let the sewing machine perform thread clamping
and back-tacking. If there is no alarm, please step back halfway to raise the
presser foot. If it alarms, please replace the presser foot solenoid.
4) Step on the front pedal to let the sewing machine perform thread clamping,
back-tacking and half anti-side trample. If there is no alarm, please back step
pedal to trim. If it alarms, please replace the thread trimming solenoid.
E09
E11
The positioning signal of main shaft
motor encoder is abnormal
1. Turn off the system power, check whether main shaft motor encoder
connector is loose or fall off, restore it to normal and restart the system.
2. Check whether the motor zero point correction setting is correct; Reset the
motor zero point correction; Whether there is oil on the encoder code plate,
please clean it if there is any;
3. If it still does not work normally, please replace the control box or main shaft
motor and notify the after-sales service.
E14 Main shaft motor encoder signal is
abnormal
1. Turn off the system power, check whether the main shaft motor encoder
connector is loose or fall off, restore it to normal and restart the system.
2. Check whether the grating is installed correctly (whether the grating screws
are tightened and whether the grating is in the center of the encoder).
3. Check whether there is oil on the encoder code plate, if there is, please clean
it up, and restart the system after recovery.
4. If it still does not work normally, please replace the control box or main shaft
motor and notify the after-sales service.
E15 Main shaft motor drive overcurrent
1. Please check whether the motor power cord has bad
contact;
2. Please check whether the motor power cord is crushed;
3. Please replace the control box or main shaft motor and notify the after-sales

service.
E17 Machine overturned
1. Turn off the system power and check if the machine is overturned.
2. Check whether the machine protection switch detection setting is correct.
3. If it still does not work normally, please replace the control box or panel and
notify the after-sales service.
E20 Main shaft motor failed to start
1. Turn off the system power, check whether main shaft motor power cord
connector and encoder connector are loose or fall off, restore them to normal
and restart the system.
2. Check whether the motor zero point correction setting is correct, reset the
motor zero point correction
3. If it still does not work normally, please replace the control box or main shaft
motor and notify the after-sales service.
E80 Abnormal communication between
main chip and drive chip Please replace the control box and notify the after-sales service.
E82 Back-tacking stepper motor
overcurrent
1. Turn off the system power and observe whether back-tacking stepper motor is
stuck. If it is stuck, remove the mechanical failure of the machine first. If it is
normal, check whether connector of back-tacking stepper motor is loose or fall
off, restore it to normal and restart the system.
2. If it still does not work normally, please replace the control box or
back-tacking stepper motor and notify the after-sales service.
E84
The positioning signal of
back-tacking stepper motor encoder
is abnormal
1. Turn off the system power and observe whether back-tacking stepper motor is
stuck. If it is stuck, remove the mechanical failure of the machine first. If it is
normal, check whether the encoder connector of back-tacking stepper motor is
loose or fall off, and restart the system after returning it to normal.
2. Check whether the grating is installed correctly (whether the grating screws
are fastened and whether the grating is in the center of the encoder);
3. Check if there is oil on the grating code plate, if so, please clean it up, and
restart the system after restoration;
4. If it still does not work normally, please replace the control box or
back-tacking stepper motor and notify the after-sales service.
E85 Back-tacking motor encoder signal is
abnormal
1. Turn off the power of the system, check whether the encoder connector of
back-tacking stepper motor is loose or fall off, restore it to normal and restart
the system.
2. Check whether the grating is installed correctly (whether the grating screws
are fastened and whether the grating is in the center of the encoder);
3. Check if there is oil on the grating code plate, if so, please clean it up, and
restart the system after restoration;
4. If it still does not work normally, please replace the control box or
back-tacking stepper motor and notify the after-sales service.
E86 Back-tacking stepper motor failed to
start
1. Turn off the power of the system, check whether the power cord connector of
back-tacking stepper motor and the encoder connector are loose or fall off,
restore them to normal and restart the system.
2. Check whether the grating is installed correctly (whether the grating screws
are fastened and whether the grating is in the center of the encoder);

4 Port Diagram
12P Function Port Description
1. Thread trimming electromagnet: 1, 8 (+32V)
2. Thread wiping/ thread clamping electromagnet: 2, 9 (+32V)
3. Thread tension releasing electromagnet: 3, 10 (+32V)
4. LED Light: 4 (DGND), 11 (+5V)
5. Reverse stitch key: 5 (signal)
6. Mending stitch key: 7 (signal)
2P Function Port Description
1. Presser foot electromagnet: 1, 2 (+32V)
6P Function Port Description
3. Check if there is oil on the grating code plate, if so, please clean it up, and
restart the system after restoration;
4. If it still does not work normally, please replace the control box or
back-tacking stepper motor and notify the after-sales service.
E87 Back-tacking stepper motor
locked-rotor
1. Turn off the system power and observe whether back-tacking stepper motor is
stuck. If it is stuck, remove the mechanical failure of the machine first. If it is
normal, check whether the power cord connector of back-tacking motor and the
encoder connector are loose or fall off, restore them to normal and restart the
system.
2. If it still does not work normally, please replace the control box or
back-tacking stepper motor and notify the after-sales service.

1. Pull thread air valve: 1(+24V), 4
2. Hook thread air valve: 2(+24V), 5
3. Suction air valve: 3(+24V), 6