Adjusting The Needle Bar Height; Adjusting The Needle Bar Lift Amount And The Driver Needle Guard - Brother BAS-311H Instruction Manual

10. STANDARD ADJUSTMENTS

10-4. Adjusting the needle bar height

2552Q
Turn the pulley in the direction of the arrow to move the needle bar to the lowest position. Then remove the rubber plug (2),
loosen the screw (3) and then move the needle bar up or down to adjust so that the second reference line from the bottom
of the needle bar (reference line A) is aligned with the lower edge of the needle bar bush (1).
* If using a DP X 5 needle, use the highest reference line (reference line a).

10-5. Adjusting the needle bar lift amount and the driver needle guard

2544Q
0135Q
1. Turn the pulley in the direction of the arrow to raise the needle bar from the lowest position until the lowest reference line
on the needle bar (reference line B) is aligned with the lower edge of the needle bar bush (1).
* If using a DP x 5 needle, align with reference line b which is the second reference line from the top.
2. Loosen the bolt (2).
3. Move the driver (3) back and forth to adjust so that it is touching the needle when the tip of the rotary hook is aligned with
the center of the needle, and then tighten the bolt (2).
NOTE:
If the driver (3) crosses the needle more than necessary, it will place a load on the needle, or it may cause poor thread
tension. Furthermore, if it does not cross the needle at all, the tip of the rotary hook will interfere with the needle and
skipped stitches may occur.
57
Center of the needle
Tip
BAS-311H
3124B
3125B
2927B