Adjustment Of Timing Between Needle And Rotary Hook - Brother BES-1216AC Instruction Manual

Chapter 8 Adjustment

2. Adjustment of Timing Between Needle and Rotary Hook

y
1. Select needle bar No. 1.
The above figure shows model BES-916AC. For model BES-1216AC, needle bar No. 12 corresponds to y .
2. Remove two flat countersunk head screws w, and remove needle plate e.
3. Make an adjustment so that the needle is brought to rotary hook r when it rises 2 mm from
the needle bar bottom point (180°) (in the position where the mark " " of the pulley is aligned
with the stop mark " ").
4. Loosen screws t of the rotary hook. Adjust the clearance between the needle and the rotary
hook to 0.2 to 0.4 mm. Tighten the two screws temporarily. The needle bar height will be
about 2 mm (Figure A).
5. Select the second needle bar (bar No. 12 for BES-1216AC) y. Check that a clearance of 0.2
to 0.4 mm is left between the needle and the rotary hook. Tighten the three screws of the
rotary hook.
Note) If the clearance between the needle and the rotary hook is not within 0.2 to 0.4 mm, repeat step 3 and
adjust both clearances at needle bar No. 1 and No. 9 (No. 12 for BES-1216AC) to the range of 0.2 to 0.4 mm
respectively.
134
q
w
e
BES-916AC • BES-1216AC
r
2mm
2mm
0.2-0.4mm
t