Adjusting The Needle And Looper Clearance; Adjusting The Needle Guide; Adjusting The Thread Handler - Brother BM-917B Instruction Manual

12. STANDARD ADJUSTMENTS

12-3. Adjusting the needle and looper clearance

0.03-0.08mm

12-4. Adjusting the needle guide

12-5. Adjusting the thread handler

Needle
Reference Lines
19
0.1-0.2mm
0.5-0.7mm
Adjust so that the clearance between the needle and the tip of
the looper (1) is 0.03-0.08 mm when the needle bar rises from
its lowest position until the tip of the looper (1) is aligned with
the center of the needle.
1. Loosen the set screw (2), and then move the looper (1) to
adjust the clearance.
2. Tighten the set screw (2).
2007M
Adjust the clearance between the needle and the needle
guard (1) to 0.1-0.2 mm.
1. Remove the feed plate and the needle plate.
2. Loosen the screw (2), and then move the needle guard (1)
to adjust the clearance.
3. Tighten the screw (2).
4. Install the feed plate and the needle plate.
2008M
2009M <Longitudinal direction>
1. Turn the machine pulley to set the needle bar to its lowest
position.
2. Loosen the two set screws (1).
3. Turn the grooved cam (2) to move the thread handler (3) to
the maximum forward position.
4. Move the grooved cam (2) forward or back to adjust so that
the clearance between the needle and the thread handler
(3) is 0.5-0.7 mm at this time.
5. Turn the grooved cam (2) to align the reference line with
the reference line of the looper setting shaft (4).
6. Tighten the set screws (1).
<Transverse direction>
1. Loosen the two set screws (5).
2. Turn the triangular cam (6) to align the reference line with
the reference line of the looper setting shaft (4).
3. Tighten the set screws (5).
2010M
BM-917B, 917C