17
Mechanical adjustment
Setscrews A
Bobbin holder Hook
Tip of hook
Hook timing
The amount of ascending travel of the needle bar from its lowest position to the position (Needle drop position 0.0)
where the tip of the rotary hook exactly meets the right side of the needle should be 3.70 to 4.00 mm.
To adjust:
1. Remove the bed cover and base cover (see page 3).
2. Attach the needle #14.
3. Turn the power switch ON. Select straight stitch.
Set the needle drop position at "0.0".
* Do not turn the switch OFF.
4. Remove the presser foot, the needle plate and the
bobbin
holder. (see page 4)
5. Turn the handwheel toward you to lower the needle at
its lowest position.
6. Loosen the setscrews A (use an Allen wrench of 2
mm width across ats).
7. Turn the handwheel toward you to raise the needle
bar by 3.85 mm from its lowest position.
8. Turn the lower shaft gear until the tip of rotary hook
meets with the right side of the needle.
Tighten the setscrews A.
* Check the needle bar height after this adjustment.
9. Attach the bed cover and base cover.
3.70 to 4.00 mm
Lowest needle position
Needle #14
Hook
Tip of hook meets the
right side of the needle
(Needle drop position 0.0)
Lower shaft gear
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