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A5 guidance book
1. PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 1
A5-N Training course material
2. PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 2
一、Product introduction
二、Control box operational
manual
三、 Control box trouble removal
四、Mechanical adjustment
五、Special parts
目录
六、Common trouble analysis
and solution
3. A3 A4
A4S
Followed by A6, etc
A5
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 3
1.1.Jack A series
一、Product
introduction
4. CONFIDENTIAL
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1.2. Product introduction
As an iterative product of
the A4S series, the A5 series
high-speed computerized
sewing machine inherits the
mechanical advantages of A4S
and adopts functions such as
short thread tail, double-shear,
electronic loose wire and
automatic winding and cutting.
Special note: The factory speed
is set to 4000 rpm, the
maximum speed can reach 5000
rpm, but the actual best use
speed is 3500-4000 rpm
without bird-nest Good-looking
New process New scaleplate design
5. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 5
1.3. Product naming rules
5
5 6
2 Sewing table
3 Hook type
5 Modle of
hook
6 head
11
Stitch length
1 3 8
2 4
1 model
7
8
Electronic control
manufacturer
H 7
11
4
Sewing
application
Less
bird-nest
N Less bird-
nest
7
E
Q
9
10
9
W Semi-dry
/ With oil
A5
P electrnic suction
device
/ 5mm
-7 7mm
E pneumatic suction dev
10
F L W
F Stainless steel
sewing table
/ Ordinary sewing
table
C domestic
hook
/ imported
hook
L Large hook
/ Ordinary
hook
C N
- Baumax
Q Qixing
Z Zobow
A Light material
H heavy material
P
A2 Computerized lockstitch
with auto-trimmer
A2S Computerized lockstitch
with 3 automatic functions
A3 High speed computerized
lockstitch
A4 Speaking Computerized
lockstitch
A4S Semi-dry computerized
lockstitch machine
A4S-N Semi-dry computerized
lockstitch with bird-nest
prevention device
A5 Semi-dry computerized
lockstitch with short
remaining thread
6. 1.4. Suitable sewing products
It is suitable for the sewing of shirts, suits, trousers,
T-shirts, skirts, down coat that are sensitive to oil
stains, and high-end garments.
shirt
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suits Suit pants Down coat
7. 1.5. A5 Basic technical specifications
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The basic specification of A5 series
Maximum sewing speed 5000rpm
needle gauge 5mm(max)
presser foot height 9mm（standard）12mm（max）
needle type DBx1 #14
operation space 262x128mm
8. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 8
1.6.New function
New functions compared to A4S
Serial
number
Technical
characteristics
Feature description
1 Double knives
trimmer
Few condense stitch at the end, with double
knives movement, can keep remaining
thread within 3mm, and prevent thread
loosing.
2 short thread
tail
3 Electronic
thread
tension
release
Electronic thread tension release, replacing
the wire –pulling structure
4 Automatic
thread
winder and
Reduce manual winding and improve the
efficiency
9. 1.7. Double knife trimmer
Normal round knife double knives 面线 4.5-5.5 2.7-2.8 mm
3.5-3.7 mm
mm底线 7-9 mm
Ordinary
round
knife
double knives +
2.6mm Needle
plate
double
knives +2mm
Needle plate
Double knife trimmer,dont need to rework
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10. 1.8 The use of each electromagnet
Wire trimming
electromagnet
Encryption seam
electromagnet
Reverse stitch
electromagnet
Oil quantity
detector
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11. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 12
1.9. New automatic thread winder
Braking device
Clip and cut
thread
effect
automatic thread winder 、
efficient
Auto winder
12. 1.10. Add Electronic thread tension release
Stable over the line
thread tension release
electromagnet
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Top plate of thread tension
release
13. 1.11.Add less bird-nest function
with
bird-
nest
装 置
Less bird-nest,beautiful stitch、easy to operate
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Without
bird-nest
14. 1.12.Special knife presser
Special knife presser
with small bird's nest assembly
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＋
15. 1.13.Semi-dry head
Semi-dry head, clean
and environmental
protection
Needle bar surface with DLC
treatment, high hardness and
good wear-resistance
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16. 1.14. Sealing oil pan
Semi-dry design, avoid dust into the machine,
extend machine useful life, reduce fabric
contamination.
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17. 1.15.Oil reminder
Oil reminder :avoid machine stuck
caused by no oil or oil overflow
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18. CONFIDENTIAL
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2.1. Factory Reset
Operation steps
on the condition of
power on，press the
Screen shows
，
button 5 seconds，
restore the factory default. When the
then panel will display boot screen
automatically, which means resets successfully.
Reset with
one button
二、Control box operational manual
P165-0000 change to P165-2121 Reset
19. 2.2. before and after backstitch
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 19
operating steps：
In standby mode, press 、 key，Set the number of before and
after backstitch
number of after backstitch
number of before
backstitch
20. 2.3. less bird-nest device
In standby mode, press button，the icon lights up, means the less bird-nest
function is turned on.
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 20
21. 2.4. Upper and lower needle position
On the condition of power on,press the button，the icon
Display on the LED screen,means lower needle ppsition.
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 21
22. 2.5. Free sewing and thread trimming setting
LED screen area
Free sewing and
thread trimming
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Free sewing: Press the button and the icon
display, means it’s free sewing mode at present.
Trimming switch: Press the button
Press the button longer again, the icon
not display, means the thread trimming is off.
longer, the icon
display up, means the thread trimming is on.
23. 2.6. W sewing settings
turns on,means it`s w swing mood.Press the
button，to the corresponding number flicking, then we can use
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W sewing /several
segment sewing
button
C refers to sewing times
A/B refers to the stitch numbers of
initial and final sewing
W sewing:press the
button
,and the icon
to adjust. The maximum adjustable stitches of initial and final sewing is 15. The
maximum adjustable sewing times is 15.
24. 2.7.Multi-segment sewing setting
Several segment sewing
button
(Press longer)
The total segment number. And the maximum
adjustable segment is 24.
Segment number setting, the first segment, the second ... Display
the total number of segments of the set, change the section
number when you adjust.
The stitch number setting the first segment of the stitch number is
16, and the range of the stitch is from 1 to 99.
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LED screen area
Multi-segment sewing setting: Press the button longer
and icon display on the LED screen,
means that it＇s multi-segment sewing mode. And press
to move, the number is flicking, then you can use to set.
25. 2.8. Switch of presser foot lifter sensor
Switch of presser foot
lifter sensor
display on the LED screen,means the
inductive presser foot lifter turns on.
off, means the inductive presser foot
lifter turns off.
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Press the button longer and the icon
Press the button again and the icon
26. 2.9 Automatic presser foot lifter settings
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Switch of press foot
lifter
The switch of press foot lifter after trimming：
Press , the icon display, means that the
press foot lifter after trimming is on.
Press again, the icon not display, means
that the press foot lifter after trimming is off.
The midway press foot lifter settings：
Press the button , the icon display ,
means that the midway press foot lifter is on.
Press the button again, the icon not
display, means the midway press foot lifter is
off.
27. 2.10 Speed adjustment
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LED screen area
to increase the speed
to reduce the speed
Speed adjustment：
On the standby condition, press
On the standby condition, press
28. 2.11 Cursor movement
In the parameter setting mode, use this button
to decrease the number , in the standby
condition, use this button to choose the right
parameter.
In the parameter setting mode, use this button
to increase
the number , in the standby condition, use this
button to
choose the left parameter.
LED screen
area
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29. CONFIDENTIAL
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2.12.Triad switch
Adding stitch
button
Back stitch
button
LED
switch
30. 2.13 Motor initial angle test method
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Press the button and hold on, then press the button to enter the monitor mode, and
press and at the same time to the parameter . Tread the pedal onward,
and the system will test motor initial angle automatically. After the test, it’s necessary to
change the parameter to , press the button to save and press the
button again to exit.
在监控模式下023项。
Initial angle value check method:
Press the button and hold on, then press the button to enter the monitor mode, the
parameter display. Press until the third number is flicking, press again
to , angle initial display. Value 120 is normal, and the error is about 8 degrees.
(Note: This parameter can only be viewed, not be adjusted)
31. 2.14.needle position adjustment
The point on the haandwheel
to the scale on the case
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Press the button and hold on, then press the button to
enter the monitor mode, the parameter interface displaying
turn the handwheel to align the point on the handwheel
with the scale on the case (the point on the handwheel a
little lower) then press and hold on,press again to
calibrate upper needle position. Press the button longer to save.
32. 2.15 Pedal settings
Pedal simulation theory
136 The initial position
137 Low speed start position
138 Accelerated position
139 Maximum speed position
136 The initial position
135 Presser foot lift position
134 Automatic cutting line
position
pedal
33. 2.16 method of use the counter
hold the key P and open the power ，cut the P153 adjust to the
need to line the number of times, such as set to 3 is cut the line 3
times, compute a number.P154 maximum cycle count (if set to 100,
count to 100 and starting from 1, generally set to maximum 9999)
P155 trimming switch is set to 1 that the counting function is
turned on, and then set in the monitoring mode can be seen the
count value（P + 011 presser foot key）
Method of adjust the counter of under line：
Hold P button, then choose to 151 set the parameter 151 value, is
settg to the total number of circle, then 152 values of the
parameters set to 5 which count function beginning, after count
will remind when shear line, the pedal without reaction, need to
press the P button to reset.
34. Electronic Parameter
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1、 In the standby state, press key “P” to enter the parameter mode；
2、 Press key and key to adjust the corresponding parameter；
3、 When the parameter have changed, parameter interface will flash. Short press
key “P” to keep the modified parameters. Long press key “P” to exit parameter
interface, return to standby state.
Parameter
Adjustable
range
System
default
Parameter description
P 0 1 200~5000 3500 the maximum speed of free sewing (the maximum speed)
P 0 3 0/1 1 Needle position selection (0:up; 1: down)
P 0 4 200~3000 1800 Start back tacking speed
P 0 5 200~3000 1800 End back tacking speed
P 0 6 200~3000 1800 Continuous back sewing speed (W sewing)
P 0 9 0/1 0 Soft start switch (0: off; 1: on)
P 1 5 0/1/2 0 Mode of adding stitch 0: continuous；1:adding half stitch；
2: adding one stitch
P 1 6 0~9999 30 the time of presser foot sensor detecting cloth
35. Electronic Parameter
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P 1 7 0~99 65 Automatic presser foot sensor sensitivity setting (between the maximum
and minimum value of the 02C parameter
display)
P 1 8 1~120 35 Stitch balance for start back tacking No.1 (Pull in compensation)
P 1 9 1~120 20 Stitch balance for start back tacking No.2 (Release of compensation)
P 2 2 0~50 8 the interval of on and off gear when adding one stitch
P 2 4 0~1024 80 Trimming point of pedal
P 2 5 1~120 35 Stitch balance for end back tacking No.1
P 2 6 1~120 20 Stitch balance for end back tacking No.2
P 2 7 0~2 1 Mode of presser foot sensor （0-2）0：off，1：effective after trimming,
2：effective before and after trimming
P 3 0 0~31 0 Feed forward torque of motor: 0: normal functions
1-31: feed forward torque level
P 3 1 10~199 50 Trimming afterburner coefficient (motor
afterburner)
P 3 2 1~500 400 trimmer electromagnet full output time ms
36. PROJECT NAME | date 项目名称 | 日期 CONFIDENTIA
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P 3 3 1~100 0 Clip line electromagnet per cycle closing time (ms)
P 3 7 1~100 0 Clip line electromagnet per cycle opening time (ms) the force of Clip line
P 4 5 1~100 1 Back stitch electromagnet per cycle opening time (ms)
P 4 6 1~100 2 Back stitch electromagnet per cycle closing time (ms)
P 4 7 200~360 360 After trimming anti pull (It realizes trimming is pulled back function)
P 4 9 100~500 250 Trimming speed
P 5 0 100~500 150 Presser foot lifting electromagnet full output time ms
P 5 1 1~100 3 Presser foot lifting electromagnet per cycle opening time (ms)
P 5 2 0~800 100 Running delay time (ms) : when presser footer comes down to the
beginning of sewing. A little more longer will be better.
P 5 3 0/1 1 Presser foot lifting function selection 0: off 1: on
P 5 4 1~100 5 Presser foot lifting electromagnet per cycle closing time (ms)
P 5 6 0/1 1 Run to up needle position after Power on： 0: no action 1: action
P 5 7 0~600 100 Presser foot lifting electromagnet protection time 0.1s; 0 means no
protection. The longest time can be keep one minute. During the setting,
midway press foot lifter and press foot lifter after trimming are effective
P 6 0 200~5000 3000 The maximum speed of constant sewing (Automatic test speed)
Electronic Parameter
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P 6 2 0/1/2/3 0 Special mode:
0: Normal mode
1: Simply sewing mode
2: Motor initial angle measurement
3: Automatically setting the pulley ratio by the CPU. 4: Automatic test modle (It
has needle stop position of automatic test, running 5s and stopping 3s)
P 6 6 0/2 2 2: safety switch function is on
0: off
P 6 8 0~5000 4000 The upper limit of the maximum speed
P 7 1 0~50 2 Slow release lifter level adjustment, the smaller values and the faster quickly
P 7 6 1~500 60 Back sewing electromagnet full output time ms
P 7 8 10~359 120 Clamp wire start angle
P 7 9 0~359 320 Clamp wire end angle
P 9
8
0~4 4 Voice volume(0~4), 4 is maximum (Restoring the factory will not change)
P 9
9
0/1/2 1 Voice selection 0: Voice Closing, 1: Chinese 2: English Default 1 Chinese
P A
0
1~9999 5000 When the sensor is on and instant shade the sensor, delay time of presser footer
coming down (unit ms)
P A
1
0~600 50 When the sensor is on and shade the sensor, delay time of presser footer coming
down (unit 0.1s)
38. PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 38
Oil
quantity
detectio
n
20F 0 0/1 Oil quantity detection
function selection
0：turn on 1：turn off
P+ Power
button
229 200 0～2500Waiting time of downtime
detection （0.25S/1）
（表五）
short
thread
tail
0A 800 0～
9999
Encryption seam speed Long press
the button
P after
booting
0B 1 0～10 Encrypted seam number setting
，
0 means Close by default
13F 800 0～
9999
Encryption seam speed P+Power
button
20B 1 0～10 Encrypted seam number setting，
0 means Close by default
39. CONFIDENTIAL
date 项目名称 | 日期 41
Less
bird-
nest
07 310 5～720 Clipping electromagnet starting angle LS（
Relative to the lower needle position angle）
Long press
the button
P after
booting
08 27 0～360 Compensation parameters of electric thread
tension device in less bird-nest mode (non-
reinforcing slow speed compensation value)
108 150 100～
800
Slowly initial sweing speed
P+Power
button
）
15B 1000 0～
9999
Turn on the less bird-nest mode
167 0 0/1/2 Lockstitch machine with edge cutter、A4、A4S
upper and lower needle position switching
207 1 0～999 The start angle of initial sweing thread
realse (the angle of thread tension release
electromagnet)
208 35 0～
9999
The end angle of initial sweing thread realse
(the angle of thread tension release
electromagnet)
20E 360 10～
720
The end angle of thread clipping
electromagnet LE（Relative to the lower needle
angle，need to bigger than LS）
215 1 0／1 Sweep thread function selection 0:turn off
1:turn on
40. Less
bird-
nest
216 1 1～999 delay time of thread wipping／thread clipping
(ms)（the speed of the upper knife on the
interlock machine）
P+Power
button
）
217 30 1～
9999
continuous time of Thread wipping／thread
clipping (ms)（the continuous acting time of
the upper knife on the interlock machine）
218 20 1～999 Recovery time of Thread wipping／thread
clipping (ms)
264 2 0～30 0：Prohibit output
2：thread wipping electromagnet
41. PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 41
Electronic
thread
tension
release
210 0
0／1／2Timing selection of the thread tension release
electromagnet：
P+开机键
0：[LS] After setting the angle, release the
thread until the upper needle position is
delayed by the time set by [T2].
1：[LS] After setting the angle, release the
thread until [LE] sets the angle.
2：[LS] After setting the angle, release the
thread ,delays the time set by [T2]
3:下针位信号后延迟[T1]设定时间进行松线动作,延迟
[T2]所设定时间为止。After the lower needle
position signal is delayed, [T1] sets the time
to release the thread and delays the time set by
[T2].
／3／4
／5／6 4:上针位信号后延迟[T1]设定时间进行松线动作,延迟
[T2]所设 定时间为止。 5:下针位信號後即開始进行松
线动作至上停针止。然后延遲[T1] 設定時間後再作
[T2]所設定的松线時間。
6:[LS] After setting the angle, release the
thread untile the upper neddle position ,至上停
针止。然后延遲[T1]設定時間後再作[T2]所設定的松线
時間。
42. 211 35 5-359 The start angle of thread tension release
electromagnet LS（Relative to the lower needle
position angle）
212 300 10-359 The end angle of thread tension release
electromagnet LE（Relative to the lower needle
position angle，need to bigger than LS）
213 1 1-999 Start delay time of the thread tension release
electromagnet T1（ms）
214 10 1～999 Delay time of the upper needle position thread
tension release electromagnet T2 上针位后延迟时间
T2（ms）
265 5 0～30 0：Prohibit output
5：thread tension release electromagnet
43. Monitoring parameter （P+ button “presser foot lifter “ to enter）
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Parameter No. Parameter
Description
Parameter No. Parameter Description
0 1 0 stitch counter 0 2 6 The ratio between motor and
machine
0 1 1 Counter for sewing pieces 0 2 7 time(hours) of motor
0 1 2 real speed of the
head
0 2 8 The sampling voltage of
interaction
0 1 3 State of encoder 0 2 9 DSP Software version
0 2 0 DC voltage 0 2 A Simulate inputing sampled
value 1
0 2 1 Machine speed 0 2 B Simulate inputing sampled
value 2
0 2 2 The phase current 0 2 C Error Counter
0 2 3 Initial electrical
angle
0 2 D QP Superstate
0 2 4 Machine angle 0 3 0 -0 37 The history record of error codes
0 2 5 The sampling voltage
of pedal
P+free sewing Control box panel version
44. PROJECT NAME | date 项 CONFIDENTIAL 44
三、Control box trouble removal
Error Code Description Solution
Err-01 Hardware
overcurrent 1、Power off, restart 2、Under normal condition, check voltage, low
voltage is 176 v, high voltage is 264 v 3、Turn the handwheel to see
whether mechanical parts is stuck 4、Check the motor plug 5、Factory
reset、test the motor angle 6、Replace the electronic control box
Err-02 Software
overcurrent
Err-03 system under
voltage
Err-04 Over-voltage
when the
machine is off
Err-05 Over-voltage in
operation
Err-06 Magnet circuit
fault
1、Check whether the plug, pin is fall off2、Unplug the electromagnet
plug to see if is still in an error 3、Replace the electromagnet4、
Replace the electric control
Err-07 Power
measuring
detection
circuit fault
1、factory reset2、Replace the electric control
Err-08 Sewing motor
blocked
1、Turn the handwheel to see whether mechanical parts is stuck 2、
Check the motor plug
3、Factory reset、test the motor angle 4、Replace the motor 5、
Replace the encoder6、Replace the electric control
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Err-09 Brake circuit
failure
1、Check whether the cement resistor plug in the electric cabinet is fall
off2、Check whether the cement resistance burst 3、Replace cement
resistance 4、Replace the electric control
Err-10 Communication
failure
1、Check the connection between control panel and controller 2、
factory reset3、Replace the panel 4、Replace the electric cabinet
Err-11 Machine head
needle
positioning
failure
1、Check whether the plug is loose 2、Replace the encoder 3、
Replace the electric cabinet
Err-12
Initial motor
electrical
angle failure
Hardly appear.
Err-13 Motor HALL failure
1、factory reset 2、Replace the motor encoder3、Replace the electric
cabinet
46. Err-14 DSP Read/Write
EEPROM failure
1、factory reset
2、test the motor angle
3、Replace the electric cabinet
Err-15 Motor over-
speed
protection
Err-16 Motor
reversion
Err-17 HMI Read/Write
EEPROM failure
Err-18 Motor
overload
Err-23 Sewing motor
blocked
encoder
failure
According to E08 to investigate, solution is the same as E08.
Switch alarm Straighten the machine head to ensure the switch is restored.
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47. 4.1. lower shaft oil supply
Oil Inlet pipe
Oil return pipe
srew of adjusting to
the oil of hook
( When the screw is
loose, the oil quantity
of the hook is small, on
the contrary, the oil
quantity of the hook is
big）
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 47
四、Mechanical adjustment
48. 4.2. Panel lubrication
thread take-up lever is
lubricated with solid grease
,don’t need to use the oil
lines for oli supply
Needle bar slider and needle
bar sleeve are slao lubricated
with solid grease
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 48
50. 4.4. height of the needle bar
Adjustment of the needle bar`s height: When the needle in
the lowest, hook within half a pinhole.
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51. 4.5.Adjustment of the hook
Turn the handwheel to make the hook tip to the center needle, and then
continue to turn the handwheel to make the needle from down to up in 2.2
2.5 mm, then to keep hook tip to above the pinhole between 1-1.2 mm,
and also the horizontal distance between needle and the hook tip is 0-0.1
mm.
1-1.2mm
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 51
0-0.1mm
52. 4.6.Adjustment of Positioning hook
Adjustment of Positioning hook：
1. The left to right of the positioning hook is generally about 0.5-1.0 mm. The gap is too
large, the sound is loud, the gap is too small, crossed the line.
2. Move the positioning hook so ,let the needle basically in the middle of the hook hole.
Positioning hook
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 52
②
53. 4.7.Adjustment of Feeding Dog Angle
feed dog high and
low screws
feed dog before
and after the screw
Feed dog tilt screw
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL
1、When the needle pitch reaches the maximum, by adjusting the feed dog before
and after the screw, make before and after the feed dog do not touch the needle
plate
2、By adjusting the feed dog of the high and low screws, so that the feed dog at
the highest,exposed needle plate plane 1-1.2mm
54. 4.8. Feed synchronization adjustment
The synchronization adjustment of needle and feeding : (The needle plate, the
tip of the tooth, and the lower hole of the pinhole are flush.) When the feeding
tooth is too slow, the needle is easily broken, especially at the codition of
backstitch.When the feed dog is too fast, the stitches are not tight, especially
when use the thick thread.
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 54
55. 4.9. stitch coincidence of backstitch
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 55
Eccentric shaft
setscrews
● Loosen the two setscrews and adjust the backstitch eccentric shaft to make the
back and forth stitches coincide.
● Adjustment requires patience and repeated adjustment until it reaches about
10 stitches.
56. 4.10. the role and installation of thread take-up lever
role：from top to bottom, release the thread for the hook to hook, When the
hook rolls to 180 degrees with thread, the thread take-up lever begins to retract
the excess thread to form a stitch.
installation ：Turn the handwheel forward ,let thread take-up lever plane is
aligned with the first screw.。
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 56
The first
screw in the
running
direction is
aligned with
the plane
during
installation
57. 4.11. needle pitch adjustment
Press the locking device on the needle pitch gauge, Rotate to
the left, the needle pitch becomes larger,rotate to the right
the needle pitch becomes smaller.
CONFIDENTIAL
57
大
小
58. 4.12.Introduction of less bird-nest device components
Less
bird-nest
device
Less bird-nest
cilp
Less bird-
nest thread
hook
Special
knife
presser
When using the bird-nest function, must open
the electric thread tension device and the thread
clamped in the thread tension device , otherwise
the seam will be off-line and broken.
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 58
windpipe Vacuuming
device
59. 4.13. Left and right adjustment of the thread hook
By loosening the Left and right adjustment screws of the
thread hook, adjust the thread hook, the left and right limit
positions are as shown below.
Wire hook left and
right adjustment
screw
The leftmost limit
position of the thread
hook The needle tip is
aligned with the inside
of the thread hook
The rightmost limit
position of the thread
hook The hook point is
aligned with the pleat
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 59
60. 4.14. Up and down adjustment of the thread hook
By loosening the up and down adjustment screws of the thread
hook, adjust the thread hook, make the distance from needle about
1-1.5mm, too high may easily break the needle, too low can not
hook the thread.
up and down
adjustment
screws
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 60
1-1.5mm
61. 4.15. adjustment of the thread tension
adjustment of the thread tension: When the thread cannot be
caught after trimming, it can be clippped by adjusting the
tension adjustment screw, as shown in the right figure below.
Clip force adjustment screw
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 61
Successfully clip the
thread
62. 4.16. Encryption seam electromagnet adjustment
the stitch length is
0.5mm
encryption seam
electromagnet is sucked.
the connecting rod and
the screw are flush
When the stitch length is 0.5mm, the connecting rod and the screw are flush
when the encryption seam electromagnet is sucked. If it is not flush, adjust the
encryption seam electromagnet fixing screw until it is flush.
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 62
63. 4.17. the bite time adjustment of movable knife
Adjust the adjusting screw by loosening the fixing screw,to make the
movable knife bite directly under the needle tip (as shown below)
Fixing screw Adjusting screw
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 63
bite directly under the needle tip
64. 4.18. Panel disassembly
A
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 64
B
C
Operation steps:
1. First take out two rubber stoppers A 、B
2. Loosen and remove the two hexagon socket screws A、B with
the 2.5MM hex socket.
3. Remove the panel and pull out the snap plug C to the right.
65. 4.19. Encoder installation.
downward
A
B C
D
E
If there is this screw，
must be removed first.
PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 65
Operation steps:
1. After removing the handwheel, use 4mm hex to loosen 4 electric control
fastening screws A、B、C、D.
2. 2. After removing the electric control, use the 4mm hex to loosen and
remove the motor fastening screw E in the lower left corner.
3. Loosen the 6 motor encoder tightening screws with a Phillips screwdriver,
then remove the upper half of the cover and then remove the motor
encoder.
66. CONFIDENTIAL
L
PROJECT NAME || date 项
项目
目名
名称
称||日期 70
4.20. Grating piece installation
1. The first screw of the motor grating piece (machine running
direction) is fixed to the plane.
2. After replacing the grating piece , be sure to confirm the left and
right position of the grating piece . Do not touch the encoder.
1
2
67. PROJECT NAME | date 项目名称 | 日期 CONFIDENTIAL 67
五、A5 Special parts
No Structure Part Number Description Amount
1
Short thread
tail
14112002 A5-0928 bracket of the short thread tail
electromagnet
1
2
3
14127001 A5-0930 Reset torsion spring 1
141S2001 A5-0927 Reverse feed link shaft screw 1
4 14105001 A5-0926 short thread tail connecting rod 1
5 14105002 A5-0937Auxiliary connecting rod 1
6 141S20003 A5-0938 Axle screw SM11/64"x40 1
7 141S20004 A5-0914Axle screw SM11/64"x40 1
8 14104005 A5-0916 Automatic reverse feed crank 1
9 14126001 A5-0929 top selling of short thread tail
electromagne
1
10 1413003300 A5-0933 assembly of short thread tail
electromagne
1
72. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 72
No. Breaking thread
picture
Breaking thread phenomenon solution
1
Breaking thread
1、The needle is bent. （1）change the needle.
2 2、Needle mounting （2）Reinstall the needle into the correct
position.
3、The quality of the sewing thread is not
good.
（3）Change the better sewing thread.
3
4 4、The needle plate hole has burrs and the
needle plate hole is small.
（4）Polish the burrs of the needle plate
hole with a fine sand cloth and replace a
large hole needle plate.
5 5、The height of the needle bar is not
correct.
（5）Adjust the height of the needle bar to
the correct position.
6、The hook has burrs and the hook tip is
worn.
（6）Remove the hook burr and replace the
hook.
6
7 7、Feeding teeth are not feeding properly. （7）Adjust the synchronous feeding cam
to the correct position.
8 8、The needle bar stroke is not correct. （8）Adjust the stroke.of the needle bar .
9 9、The positioning hook has a burr. （9）Correct or replace the positioning
hook.
10 10、The thread tension is too tight. （10）Adjust the thread`s tension
11 11、The hook and the needle are not
properly matched.
（11）Adjust the fit of the hook and the
needle.
六、Common trouble analysis and
solution
73. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 73
N
o.
Skipping
thread picture
Skipping thread
phenomenon
solution
1
needle
skip/thread
skip when
sweing
1、Needle is bend. （1）change the needle。
2、Needle mounting。 （2）Reinstall the needle to the correct
position
2
3、Sewing thread quality is not
good.
（3）change the better aweing thread.
3
4、The needle is not at the center
of the needle plate hole.
（4）Replace or adjust to the needle
at the center of the needle plate
hole.
4
5、The height of the needle bar is
not right.
（5）Adjust the height of the needle
bar to the correct position.
5
6、The hook tip is worn. （6）Grind the angle of the
hook tip.
6
7、The needle handle is not
attached to the top of the
needle bar hole.
（7）Reinstall the needle to the top of
the needle bar hole.。
7
8、The hook position is incorrect. （8）Adjust the left and right position
of the hook and the hook line time
to the correct position.
8
9、The thread take-up spring is
not in the correct position.
（9）Adjust the thread take-up spring
to the correct position.
9
10 10、The presser foot is not lowered. （10）Turn the needle to the bottom
and adjust the presser foot screw.
74. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 74
No Floating thread
picture
Floating thread phenomenon solution
1 1、Sewing thread quality is
not good.
(1) change the better aweing thread
2 2、The bottom thread is too
tight or too loose
(2) Adjust the shuttle pressure of the
sling.
3 3、The upper thread is too
tight or too loose
(3) Adjust the tension of the thread
tension device
4 4、The needle bar is too low. (4) At the time of thin material,
the needle thread can't be picked
up.
5 5、The feeding time of the
feed dog is incorrect.
(5) Adjust the timing of the
synchronous feed cam to the
correct position.
6 6、The needle plate hole is too
small.
(6) Replace the needle plate with a
large hole
7 7、The position of the hook
positioning hook is incorrect.
(7) Adjust the gap between the
positioning hook and the hook.。
8 8、Thick line float, the line
slot is too small.
(8) Fix and increase of the outlet slot.
9 9、The presser foot is not
lowered.
(9) Turn the needle to the bottom
and adjust the presser foot screw
。
10 10、The presser foot pressure
is too loose or too tight.
(10) Adjust the pressure of the
presser foot.
Line throwing on
the fabric
The bottom
thread is not
tight enough
The upper
thread is not
tight enough
75. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 75
NO.- Needle broke
picture
Needle broke
phenomenon
solution
1
Needle break
1、The needle handle is
not attached to the top
of the pinhole.
（1）Reinstall the needle to the top
of the needle bar hole.
2 2、The needle is bent. （2）Replace the needle.
3 3、The needle is not at
the center of the needle
plate hole.
（3）Replace or adjust to the needle at
the center of the needle plate hole.
4 4、The height of the
needle bar is not right.
（4）Adjust the height of the needle
bar to the correct position.
5 5、The feeding time of
the feed dog is incorrect.
（5） Adjust the timing of the
synchronous feed cam to the correct
position.
6 6、The hook position is
incorrect.
（6）Adjust the left and right position
of the hook and the hook line time
to the correct position.。
7 7、Broken needle when
sewing thick material
（7） Replace the large needle。
8 8、The needle model is
wrong.
（8）Replace the needle of the
corresponding model。
76. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 76
9
Needle break
9、Presser foot and
needle position are
wrong。
（9）Adjust the presser foot so that
the needle is at the center of the
presser foot.
10 10、The sewing thread
tension is too large.
（10）Adjust the tension of the thread
clamp and check the threader。
11 11. The pressureof the
presser foot is too
small
（11） Increase the pressure on the
presser foot。
77. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 77
No. The thread does
not come up
when initial
sweing
phenomenon solution
1
skip stitch/take line
at when initial
sweing
1、The bottom line is too
tight, and the thread is
short after trimming.
（1）Adjust the shuttle pressure
to reduce the tension of the
bottom thread.
2
2、The bottom line is too
loose, the machine
stops after trimming,
（2）Adjust the pressure of the
shuttle to increase the
tension of the bottom thread.
3 3、the speed of initial
sweing is too fast.
（3）Reduce the speed of initial
sweing iand adjust the
parameters.
4
4、The bobbin is
deformed.
（4）Replace the bobbin
5
5、The bobbin and the
bobbin case are poorly
matched.
（5）Replace the bobbin or the
shuttle.
78. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 78
No. bad trimming
picture
bad trimming
phenomenon
solution
1
Can't cut the thread
1、The trimming cam is not in
the correct position。
（1）Adjust the trimming cam to the correct
position。
2 2、The movable knife and the
fixed knife are not in good
contact.
（2）Adjust the movable knife and the fixed
knife to the proper position
3 3、The blade of the moving
knife is bad.
（3）Replace the moving blade.
4 4、The blade of the fixed knife
is bad.
（4）Grind or replace the fixed blade.
5 5、the machine stops after
trimming
（5） Adjust the trimming cam position
No. Bad parking picture Bad parking
phenomenon
solution
Parking location is
incorrect
1、After parking,the
parking position are not
good. Not in the
specified location.
（1） Adjust the handwheel magnet
and adjust to park to the correct
position. The rod is 1.5mm away from
the highest point.
79. CONFIDENTIAL
PROJECT NAME | date 项目名称 | 日期 79
No. Fabric uneven picture Fabric uneven
phenomenon
solution
1 Fabric uneven 1、Whether the
pressure of presser
foot is too small.
（1）Adjust the proper
pressure of presser foot
2 2、Whether the
height, flatness of
feeding teeth is
suitable.
（2）Adjust the height and
flatness of feeding teeth.
3 3、Whether the
tightness of
external and
bottom thread is
appropriate.
（3）Adjust the tightness of
external and bottom thread.
