18
⇒
Mechanical adjustment
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. Attach the needle #14.
2. Turn the power switch ON. Select straight stitch .
Set the needle drop position at "0.0".
Turn the power switch OFF.
3. Remove the presser foot, the needle plate and the
bobbin
holder. (see page 4 to 5)
* Cover the needle plate with the fabric to prevent
damaging the needle plate when removing.
4. Remove the bed cover (see page 4).
5. Turn the handwheel toward you to lower the needle at
its lowest position.
6. Loosen the setscrews of the lower shaft gear.
7. Turn the handwheel toward you to raise the needle bar
further 3.85 mm from its lowest position.
8. Turn the lower shaft gear until the tip of ratary hook
meets with the right side of the needle.
Tighten the setscrews of the lower shaft gear.
• Check the needle bar height after this adjustment (see
page 19).
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)
Adjust key
Adjusting window
Bobbin holder
Hook
Tip of hook
Lower shaft gear
Setscrew
