-27-
8.
HEIGHT OF FEED DOG
STANDARD
When the balance wheel is turned to raise the feed dog to its highest position, the standard height of the feed dog
above the needle plate should be 0.9-1.1 mm.
ADJUSTMENT
1.
Turn the balance wheel to raise the feed dog to its highest position.
2.
Loosen the screw securing the vertical feed roller shaft.
3.
Turn the vertical feed roller shaft to adjust the feed dog height to within 0.9-1.1 mm.
4.
Tighten the screw securing the vertical feed roller shaft.
Adjustment Points
1.
If the feed dog is too high, the feed dog may contact the back of the needle plate, a noise may be generated,
an incorrect forward and backward motion of the feed bar may be produced, an incorrect feed may be
produced, or the fabric may not feed.
2.
If the feed dog is too low, an incorrect feed may be produced or the fabric may not feed.
Содержание BL7800
Страница 1: ...4 2001...
Страница 4: ...2 1 MECHANICAL CHART...
Страница 9: ...7 1 DISASSEMBLING AND REASSEMBLING THE OUTER PARTS AND MAIN PARTS 8 2 LEAD WIRE ARRANGEMENT 19...
Страница 15: ...13...
Страница 17: ...15...
Страница 19: ...17...
Страница 21: ...19 2 LEAD WIRE ARRANGEMENT...
Страница 43: ...41 Main PC board...
Страница 44: ...42 Power supply unit Power 120 Power 230...
Страница 45: ...43 Operation board Other PC boards...
Страница 46: ...BL7800 T1010141...