HappyJapan HCR3-1502, Руководство по обслуживанию

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189
E9-2 Thread break
Trouble Factor Cause of trouble and measure Page
Thread break
Mechanical
1. Is needle drop unstable by vibration? 2-1
1-1 Reconsider where to install the machine.
1-2 Move the machine to floor fully reinforced.
2. No burr or scratch in thread guide hole? 2-8
2-1 Remove burr and scratch.
2-2 Replace of thread guide.
3. No problem in thread adjusting spring? 2-8
3-1 Replace spring if it doesn't spring.
3-2 If weak or broken, replace it.
4. Does detecting roller make smooth turn?
4-1 Clean inside hole of bearing.
4-2 Correct so as for slit disc not to touch sensor. E2-4
4-3 Correct so as for cable not to touch slit disc.
4-4 Check cable of TC 12 Board is unconnected
5. No problem in thread guide unit and thread tension ass’y? 2-8
5-1 Remove burr and scratch if appeared.
5-2 Remove lints and clean.
6. Does disc on thread tension ass’y. turn smoothly? 2-8
6-1 Remove lints and clean.
6-2 Replace
7. Is backlash between take-up lever and take-up crank roller not bigger? 4-2-11
7-1 Replace of take-up lever.
8. No problem in needle holder?
8-1 Remove burr and scratch.
8-2 Make proper fixing. (direction) 3-1
8-3 Replace if thread guide is bent. 2-8
9. No burr and scratch on needle plate? 2-8
9-1 Remove burr and scratch in needle hole.
9-2 Remove burr and scratch around needle hole on back of needle plate.
9-3 Replace it if not furbished.
9-4 If furbishing made needle hole wider, replace it.
10. No problem in pressure foot?
10-1 Remove burr and scratch. 2-8
10-2 Correct bent. 2-8
10-3 Adjust height. 4-1-4
10-4 Replace of pressure foot. 4-1-5
10-5 Replace of pressure foot drive cam.
( ) ----- Reference instruction book