7. ASSEMBLY
BAS-311H
57
1) Align the index mark D on the thread trimmer cam (17)
and the index mark E on the joint assembly (12), and then
provisionally tighten the set screw (18) at the index mark
side.
2) After tightening the set screw (19) at the screw stop side,
fully tighten the set screw (18) at the index mark side.
3) Carry out the adjustments in “8-10.
Adjusting the thread
trimmer cam position”.
Apply the specified grease unit (SB1275-101) to the grooves.
Tighten the set screw so that the screw stop A on the motor
shaft is in the same phase as the screw stop B on the
thread trimmer cam.
Tighten the set screw so that the screw stop C on the upper
shaft is at a phase of approximately 180 degrees from the
screw stop A on the motor shaft.
4644Q
Install the motor assembly (14) so that the
harness is facing downward.
14. Motor assembly
15. Bolts [4 pcs.]
16. Set screws [2 pcs.]
17. Thread trimmer cam
18. Set screw
19. Set screw
20. Set screws [2 pcs.]
21. Set screws [2 pcs.] (Temporarily tighten)
22. Pulley assembly
Adjust while referring to “7-3. Intermittent
presser foot lifter mechanism”.
3284B
3283B
