19
Setscrew C
Setscrew B
Setscrew A
Hook base plate
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 -0.10 to +0.05 mm.
1. Remove the bed cover (refer to page 3).
2. Loosen the setscrews A, B and C. Tighten the
setscrew C lightly.
3. Turn the handwheel toward you until the tip of the
hook comes behind the test pin. Adjust the clearance
between the needle and the tip of the rotary hook, by
moving the hook base plate up or down, so the test
pin just touch 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 (refer to page 19).
