Needle And Looper Timing Adjustment - Brother DA-9280 Manual

10. STANDARD ADJUSTMENTS

10-2. Needle and looper timing adjustment

1513B
1514B
<Looper forward travel>
19
1515B
<Looper backward travel>
1516B
DA-9280
Adjust so that the height of the needle is 0.2 - 0.8 mm lower
when the looper (1) tip is aligned with the needle (2) center while
the looper is moving backward than when the looper (1) tip is
aligned with the needle (2) center while the looper is moving
forward.
1. Remove the presser foot, needle plate and feed dogs. (Refer
to "10-1. Needle bar height adjustment".)
2. Remove the two screws (3), and then open the belt cover
plate (4).
3. Turn the machine pulley (5) toward yourself until loopers (1)
reach the end of their backward travel.
4. Loosen the screw (6) and move the looper holder (7) in the
arrow direction until the distance between the needle (2)
center and the looper (1) tip is 2.7 - 2.9 mm, and retighten
the screw (6) securely.
5. Turn the machine pulley (5) toward you by hand until the
looper (1) tip is aligned with the needle (2) center while the
looper is moving forward.
6. Loosen cap screw (8), and then loosen two set screws (10)
on lower belt wheel (9).
7. While holding the looper (1) so that the tip of the looper (1)
does not move from the center of the needle (2), turn the
machine pulley (5) toward you by hand to move the needle
(2) up or down until the distance between the tip of the
looper (1) to the top of the needle hole (A) is approximately
2.9 mm.
8. Tighten the two set screws (10) securely, and then tighten
the cap screw (8).
9. Check that the needle height is 0.2 - 0.8 mm lower when the
looper (1) tip is aligned with the needle (2) center when the
looper (2) starts moving backward and moves to the right, in
comparison to the when the looper (1) tip is aligned with the
needle (2) center when the looper (2) starts moving forward
and moves to the left.
* If the adjustment is not correct, repeat the adjustment
procedure from step 4, or check the needle height.
(Refer to "10-1. Needle bar height adjustment".)
10. Close the belt cover plate (4), and then tighten the two
screws (3).
11. Install the presser foot, needle plate and feed dogs.