12
MC 9500
Adjusting Clearance between Needle and Hook
The clearance between needle and rotary hook should be -0.10 to + 0.05 mm.
1 Remove the needle plate, bobbin holder, base cover
and bed cover (See page 3 - 4), and attach the Test
pin .
2 Turn the power switch “ON” and select the pattern
No. 6, then set the zigzag width at “ 7.0 ” by pressing
“ADJUST” key.
3 Loosen Screws (A) , (B) , (C) and tighten
Screw (C) temporarily.
4 Turn the handwheel toward you and adjust the
clearance between the Test pin and the Tip of
rotary hook to - 0.10 to + 0.05 mm by moving
the Rotary hook set plate up or down.
5 Tighten the screws (A) ,(B) , (C) firmly.
6 Check the rotary hook driver gear and the lower shaft
gear backlash.
If gears mesh or engage tightly or loosely, check
“Adjusting Backlash between Hook Drive and Lower
Shaft Gear”. (See page 13 )
7 Reattach the bed cover, base cover, base lid, needle
plate, bobbin holder and needle.
Test pin
Screw (A)
Screw (B)
Screw (C)
Rotary hook set plate
- 0.10 to +0.05 mm
Tip of rotary hook
4
2
5
3
6
1
7
2
4
1
3
4
2
1
3
4
6
5
7
2
1
3
4
6
5
7
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