Troubleshooting - SunStar SPS/E-BH3100 User Manual

7

Troubleshooting

Pleas examine the following items before applying repair and after service.
If you cannot solve the problem using these resources, please inquire your SUNSTAR distributor after shutting the electric power off.
Please turn off the electric switch and unplug the electric outlet before working.
If you work the pedal, it will give a cause to harm on your body by operating the machine.
Description
No.
The belt tension has got loosened too much or the belt
Abnormalities on the
is ruptured.
machine starting and
1
operation
Fuse shortage for the electric power or the circuit
Bad stopping
The main drive belt has got loosened.
2
position
Damaged needle (The needle has got twisted in or the
needle hole, groove or end has got worn or deformed.)
Needle break
3
A wrong mounting of the needle
Contacting the needle with the hook.
A wrong threading.
A wrong mounting of needle(Needle height, direction, etc.)
Damaged needle(The needle has got twisted in or the
needle hole, groove or end has got worn or deformed.)
Thread cutting
4 Strong tensions of the upper thread and the lower thread.
Adjust the tension and the stroke of the thread take-up
spring
A wrong wire connection of the thread sensor plate.
Twisted needle is used.
Improper size of the needle compared with the used
thread
Bad mounting of the needle.
Stitch skipping
Improper timing of the needle and the hook.
5
A broad interval between the needle groove and the
shuttle point.
An excessive tension and movement of the thread
take-up spring.
The tension of upper thread is weak.
Bad thread tightening
The tension of lower thread is weak.
6
Improper timing of the needle and the hook.
The crossing tension between the moving mes and
the fixing mes has got loosened.
Error in trimming
7
The knife edges of the moving mes and the fixing mes
have got worn.
Danger
Check and Cause
20
Solution
Adjust the belt tension or exchange it.
Confirm the fuse shortage of the main shaft motor
drive in the control box and then exchange it.
Adjust the belt tension.
Exchange the needle.
Mount the needle correctly.
Adjust the interval between the needle and the hook.
Thread it correctly.
Mount the needle again.
Exchange the needle.
Adjust the tensions.
Adjust the tension of the thread take-up spring and the
movements.
Connect the wire with the thread sensor plate again.
Exchange the needle.
Exchange the needle.
Mount the needle again.
Adjust the timing of the needle and the hook again.
Adjust the needle drop point again.
Adjust the tension of the thread take-up spring and the
movements.
Adjust the upper thread tension.
Adjust the lower thread tension.
Adjust the timing of the needle and the hook again.
Adjust the fixing mes tension.
Exchange the moving mes and the fixing mes.