24
Setscrew C
Setscrew B
Setscrew A
Hook base plate
1. Remove the bed cover (see page 3).
2. Loosen the setscrews A, B and C. Tighten the setscrew C
lightly.
3. Turn the handwheel toward you. Adjust the clearance
between the needle and the tip of the rotary hook, by
moving the hook base plate up or down, to adjust the
clearance between the needle and the tip of the hook.
4. Tighten the setscrews A, B and C.
5. Check the backlash between the lower shaft gear and the
hook drive gear. If the backlash is too great or the
engagement of the gears is too tight, adjust the backlash
(see page 25).
Mechanical Adjustment
Clearance between needle and tip of the rotary hook (method 2)
The clearance between the needle and the point of hook should be -0.1 to +0.05 mm.
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