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HE-800A
9.CLEANING AND MAINTENANCE .........69
9-1. Cleaning .........................................................69
9-2. Draining the oil................................................ 70
9-3. Cleaning the control box air inlet port............. 70
9-4. Cleaning the eye guard ..................................70
9-5. Checking the needle....................................... 71
9-6. Cleaning the length feed plate........................ 71
10. STANDARD ADJUSTMENTS ............72
10-1. Adjusting the needle bar height.................... 72
10-2. Adjusting the needle and hook timing ..........73
10-3. Adjusting the clearance between needle
and hook point .............................................. 73
10-4. Adjusting the inner rotary hook and
rotary hook holder overlap............................ 74
10-5. Adjusting the work clamp pressure ..............74
10-6. Adjusting the cutter installation..................... 74
10-7. Adjusting the upper thread trimming ............75
10-7-1. Adjusting the installation height of
the upper thread scissors..................75
10-7-2. Adjusting the upper thread scissors
opening timing................................... 76
10-8. Adjusting the lower thread clamp timing....... 77
10-9. Adjusting the bobbin presser........................77
10-10. Adjusting the needle up stop position......... 77
11. CHANGING FUNCTIONS USING
THE MEMORY SWITCHES ................78
11-1. Memory switch table..................................... 79
12. PROGRAM INITIALIZATION..............80
12-1. Initializing all programs................................. 80
12-2. Initializing a single program..........................80
13. CHANGING FUNCTIONS USING
THE DIP SWITCHES ..........................
81
13-1. Panel DIP switches....................................... 81
13-2. Circuit board DIP switches ........................... 83
14. ERROR CODE TABLE .......................85
15. GAUGE PARTS LIST .........................
89
16. TROUBLESHOOTING........................
92
16-1. Upper thread breakage................................. 92
16-2. Skipped stitches ........................................... 93
16-3. Uneven seams (1) ……
At the sewing start..................................... 94
16-4. Uneven seams (2) ……
Lower thread is lifted up at
the sewing start .........................................95
16-5. Uneven seams (3) ……
Seam lifts up at the sewing start................96
16-6. Uneven seams (4) ……
Uneven sewing pitch at the sewing start
....96
16-7. Uneven seams (5) ……
Poor rounding of seam .................................96
16-8. Uneven seams (6) ……
Around rear tack or front tack....................96
16-9. Uneven seams (7) ……
Loose thread end at end backtack ............97
16-10. Uneven seams (8) ……
Thread sticking out at end backtack........97
16-11. Uneven seams (9) ……
Sticking in needle plate............................97
16-12. Uneven seams (10) ……
All stitches................................................98
16-13. Upper thread run out...................................99
16-14. Unraveling of thread trimmed by upper
thread trimmer assembly...........................101
16-15. Upper thread mis-trimming .......................102
16-16. Needle strikes upper thread trimmer ........102
16-17. Needle breakage.......................................103
16-18. Imperfect cutter function
(imperfect material cutting)........................104
16-19. Cutter does not return...............................105
16-20. Cutter and upper thread scissors touch....105
16-21. Seam is cut ...............................................105
16-22. Upper thread mis-winding.........................106
16-23. Work clamp is not raised (1) Pulse motor
stepping sound cannot be heard...............106
16-24. Work clamp is not raised (2) Pulse motor
stepping sound can be heard....................107
16-25. Lower thread is not trimmed
(pulls when material is removed)...............108
16-26. Feed mechanism does not operate or
motor is out of step....................................108
16-27. Needle does not zigzag or noise occurs
when needle zigzags.................................109
16-28. Sewing machine stops during sewing.......109
16-29. Upper shaft does not rotate as far as
the needle up stop position .......................109