Happy HCS-1201-30, Maintenance Manual

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Trouble shooting(Off-registration of pattern)
7-2-4
Trouble Factor Cause of trouble and measure Page
Off-registration
Mechanical
1. Does frame move smoothly?
of pattern 1-1 Avoid curling of thread and cloth.
1-2 Reinstall of outer cover in case of touch with outer cover. 2-1
1-3 Adjust with no clearance between Arm and Connecting plate B.
2. Is bound of frame base too big? (6-1)
2-1 Fix frame base between bearing and base without gap.
3. Is carriage belt tension proper? 3-7-1
3-1 Adjust all belts as specified. 3-7-3
4. No loosening of screws on carriage drive?
4-1 Check screw. If loosened, tighten firmly.
5. No lints or dust around idler pulley on carriage?
5-1 Clean
6. No damage in carriage belt? 3-7-2
6-1 If damaged, replace. 3-7-4
7. No backlash of back and forth in moving head?
7-1 Adjust positioning roller shaft to remove backlash back and forth. 3-3-1
8. Is height of pressure foot proper?
8-1 Adjust as specified. 3-2-9
9. No problem in motion of pulse motor?
9-1 Check wiring. If screw got loosened, tighten more.
9-2 After 9-1, still problem, then replace.
10. No problem in motion of PMD board?
10-1 Check wiring. If screw got loosened, tighten more.
10-2 After 10-1, still problem, then replace.
11. Does't other frame than Happy's genuine one used?
11-1 If frame is too heavy, don't use it.
11-2 If setting is not proper, set it so as not to move.
12. No problem in CPU board?
12-1 Try to initialize. 5-2-1
12-2 Replace of CPU board.
13. Is number of revolution proper? (11-1)
13-1 Make automatic speed setting. 5-3-1
14. Not affected by noise?
14-1 Don't use the machine near where noise is generated.
Operator 1. Is setting of frame correct? (6-3) (7-6)
1-1 Frame should be put in positioning hole on tubular frame.
1-2 Set so as for screw not to loosen.
( ) ----- Reference instruction book