13
8
Trouble shooting(Erroneous thread cut)
7-2-3
Trouble Factor Cause of trouble and measure
Page
Erroneous
Mechanical
thread cut
2. Isn't rubbing of fixed knife and moving knife weak?
(E-190) 2-1 Adjust to be able to rub properly.
3-6-8
(E-193) 3. Does moving knife make smooth move? (23-3)
3-1 Check if rubbing of moving knife and fixed knife is not too strong.
3-6-8
4. Check Displace of moving knife.
4-1 Adjust of moving knife position. 3-6-9
5. Check defacement of moving knife or fixed knife.
5-1 If possible, furnish with file.
5-2 Replace
3-6-6
3-6-7
6. No backlash in up and down direction of knife drive shaft?
3-6-8
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?
3-6-8
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 CONT-J board ass'y, replace.
8-3 If trouble found in thread cut pulse motor, replace.
9. Is number of revolution proper at time of thread cut?
9-1 Make automatic speed setting.
(25-2)
9-2 If trouble in
LCD-CE-U board ass'y, replace. 5-4-1
10. Is there no skipped stitch?
10-1 Adjust needle depth.
3-3-6
10-2 Adjust clearance between needle and rotary hook.
3-5-1
10-3 Is height of pressure foot proper?
3-2-10
10-4 Is rotary hook timing proper?
3-5-1
10-5 Is relation between needle and thread proper?
( ) ---Reference instruction book
Summary of Contents for HCH-701-30
Page 1: ...Maintenance Manual for Embroidery Machine HCH 701 30 Version 2 4 HappyJapan Inc ...
Page 132: ...128 Electrical connection diagram 5 ...
Page 133: ...129 Electrical connection diagrams 5 ...
Page 134: ...130 List of electrical connection diagrams 5 ...
Page 137: ...130c HCD81222 LCD CE MX 基板組 ...
Page 138: ...130d HCD8116 TP switch board ass y 3 82 7 32 7 387487 2487 ...
