TROUBLE SHOOTING |
Troubles |
Reasons |
1.Top thread break |
1.Poor quality thread
2.Thread in chaos
3.Thread is scratched.
4.Thread is pulled too tight.
5.The space between the shuttle and shuttle knife is not large enough.
6.The position of shuttle is too close to the front side.
7.Before the thread is completely finished the shuttle enters the thread-hole of needle.(Wrong Time setting)
8.The material feeding time is not right. (Check the worm-screw is tight or not).
9.The needle position is too high or wrong set. |
2.Bottom thread break |
1.The winding of the bottom thread is irregular.
2.Poor quality thread
3.Thread is pulled too tight.
4.Wrong thread guiding in shuttle.
5.Shuttle with cracks
6.The stroke of thread-feeding is too large. |
3.Thread jumping |
1.The position of shuttle is too forward.
2.The position of shuttle is too backward.
3.The needle-hole is not complete, and the shuttle enters the thread-hole.
4.The space between the shuttle and shuttle knife is too large.
5.The position of the needle is too high.
6.Wrong side needle setting |
4.Needle-cut |
1.Needles are lack of strength.
2.Motion of the needle and material feeding are not synchronous.
3.Wrong needle ¨Cposition
4.Wrong guide-board position |
5.Irregular patterns (vertical materials feeding) |
1.Wrong rotation (ratchet wheel)
2.The Clip force of roller is not enough.
3.Anti-reverse wheel doesn¡¯t work well.
4.The motion of ratchet wheel and needle are inordinate. |
6.Irregular patterns (horizontal materials feeding)
|
1.The space is too big between worm wheel and worm.
2.The space is too big between gears.
3.The space is too big between cam and cam-roller.
4.Wrong cam-position setting
5.The clip-force between the rollers is not strong enough.
6.The pressures of the cloth and cotton-feeding are wrong.
7.The cloth and cotton that lie in the materials feeding-shaft are distorted.
8.The thread-pressure is too strong.
9.The motions of cam and needle aren¡¯t coordinate. |
7.Unproper pressure |
1.Winding of bottom thread is not regular.
2.The springs in the shuttle have trouble.
3.Thread-tight rings have trouble.
4.Shaking of the machine
5.Poor quality thread |
