HappyJapan HCR3-1502, Руководство по обслуживанию

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E9-3 Erroneous thread cut
Trouble Factor Cause of trouble and measure Page
Erroneous
Mechanical
1. Is thread cut timing proper?
thread cut 1-1 Set timing to specified value. 4-5-2
(E-190) 2. Isn't rubbing of fixed knife and moving knife weak?
(E-193) 2-1 Adjust to be able to rub properly. 4-5-6
3. Does moving knife make smooth move?
3-1 Check if rubbing of moving knife and fixed knife is not too strong. 4-5-6
3-2 Check no loosening of screw on moving knife. 4-5-3
3-3 Check no damage or scratch on face of moving knife.
4. Check Displace of moving knife.
4-1 Adjust of moving knife position. 4-5-5
5. Check defacement of moving knife or fixed knife.
5-1 If possible, furnish with file. 4-5-6
5-2 Replace 4-5-3
6. No backlash in up and down direction of knife drive shaft? 4-5-3
6-1 Check no loosening of screw on moving knife.
6-2 Check no loosening of screw on knife drive shaft.
7. No backlash in fixed knife? 4-5-6
7-1 Check no loosening of screw on fixed knife.
8. Does thread cut pulse motor work properly?
8-1 Check cable.
8-2 If trouble found in LCD-CE board or CONT-R2 board, replace. E3-2, E2-1
8-3 If trouble found in thread cut pulse motor, replace.
8-4 Adjust of thread cut sensor position. E2-6
9. Is number of revolution proper at time of thread cut?
9-1 Make automatic speed setting. E4-3
9-2 If trouble in LCD-CE board or CONT-R2 board, replace. E3-2, E2-1
10. Is there no skipped stitch?
10-1 Adjust needle depth. 4-2-6
10-2 Adjust clearance between needle and rotary hook. 4-4-1
10-3 Is height of pressure foot proper? 4-1-4
10-4 Is rotary hook timing proper? 4-4-1
10-5 Is relation between needle and thread proper? 3-3
( ) ----- Reference instruction book