Feed Dog Forward/Reverse And Left/Right Adjustment - Brother BC800 Service Manual

Adjustment
1. Hold down the backstitching button and the selecting button (right), and turn the power on (the buzzer must sound
four times).
2. Select pattern number [07].
3. Remove needle plate A.
4. Press the [REV] key twice to set the feed length to 0 mm. (Check that the mark on the feed adjusting gear is
aligned with that on the F pulse motor gear.)
5. Loosen the screw (bind 3 x 8), temporarily install needle plate A, and adjust the forward/reverse and left/right
positions of the feed dog.
*Key point
• Adjust the gap between the forward edge of the feed dog middle tooth and feed plate A front to back to 3.2 -
3.8 mm.
• Adjust the left and right gaps between the feed dog and needle plate A to be approximately the same.
• Make sure that the feed dog and needle plate A are not at an angle to each other.
6. Tighten screw (bind 3X8).
7. Tighten screw M4 (two).

Feed dog forward/reverse and left/right adjustment

Parallel
Screw
(bind, M3x8)
3.2-3.81mm
Screw
(bind, M3x8)
4 - 19