HE-800C
8. CLEANING ........................................... 62
8-1. Cleaning ......................................................... 62
8-2. Draining the oil ................................................ 63
8-3. Cleaning the control box air inlet port ............. 63
8-4. Cleaning the eye guard .................................. 64
8-5. Checking the needle ....................................... 64
8-6. Cleaning the length feed plate ........................ 64
9. STANDARD ADJUSTMENTS .............. 65
9-1. Adjusting the needle bar height ...................... 65
9-2. Adjusting the needle and hook timing ............ 66
9-3. Adjusting the clearance between needle
and hook tip .................................................... 67
9-4. Adjusting the inner rotary hook and
rotary hook holder overlap .............................. 67
9-5. Adjusting the work clamp pressure ................ 67
9-6. Adjusting the cutter installation ....................... 68
9-7. Adjusting the installation height of
the upper thread trimmer ................................ 69
9-8. Adjusting the upper thread trimmer
opening timing ................................................ 70
9-9. Adjusting the lower thread clamp timing......... 71
9-10. Adjusting the bobbin presser ........................ 71
10. TABLE OF ERROR CODES ............... 72
11. TROUBLESHOOTING ........................ 78
11-1. Upper thread breakage................................. 78
11-2. Skipped stitches ........................................... 79
11-3. Uneven seams (1) ……
At the sewing start ..................................... 81
11-4. Uneven seams (2) ……
Lower thread is lifted up at
the sewing start ......................................... 82
11-5. Uneven seams (3) ……
Seam lifts up at the sewing start ............... 82
11-6. Uneven seams (4) ……
Uneven sewing pitch at the sewing start... 83
11-7. Uneven seams (5) ……
Poor rounding of seam ................................. 83
11-8. Uneven seams (6) ……
Around rear tack or front tack .................... 83
11-9. Uneven seams (7) ……
Loose thread end at end backtack ............ 83
11-10. Uneven seams (8) ……
Thread sticking out at end backtack ........ 84
11-11. Uneven seams (9) ……
Sticking in needle plate ............................ 84
11-12. Uneven seams (10) ……
All stitches ................................................ 85
11-13. Upper thread run out ................................... 86
11-14. Unraveling of thread trimmed by upper
thread trimmer assembly ............................ 88
11-15. Upper thread miss-trimming........................ 89
11-16. Needle strikes upper thread trimmer .......... 90
11-17. Needle breakage ......................................... 91
11-18. Imperfect cutter function
(imperfect material cutting) .......................... 92
11-19. Cutter does not return ................................. 92
11-20. Cutter and upper thread trimmer touch ....... 93
11-21. Seam is cut ................................................. 93
11-22. Upper thread miss-winding ......................... 94
11-23. Work clamp is not raised (1) ……
Pulse motor stepping sound cannot
be heard ...................................................... 94
11-24. Work clamp is not raised (2) ……
Pulse motor stepping sound can
be heard ...................................................... 95
11-25. Lower thread is not trimmed
(pulls when material is removed) ................ 96
11-26. Feed mechanism does not operate or
motor is out of step ..................................... 96
11-27. Needle does not zigzag or noise occurs
when needle zigzags .................................. 97
11-28. Sewing machine stops during sewing ......... 97
11-29. Upper shaft does not rotate as far as
the needle up stop position ......................... 97
11-30. Operation panel display freezes and
operation is not possible ............................. 97
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