Adjusting Clearance Between Needle And Hook - Bernina Deco 330 Operation, Service Manual & Parts List

Deco 330

Adjusting Clearance between Needle and Hook

The clearance between needle and rotary hook should be -0.10 to + 0.05 mm.
1
3
5
6
2
4
7
1 Remove the needle plate, bobbin holder, base cover
and bed cover (See page 3 - 4).
Replace the needle with the Test pin 5 .
2 Loosen Screws (A) 1 , (B) 4 , (C) 2 and tighten
Screw (C) 2 temporarily.
3 Turn the handwheel to bring the tip of the rotary
hook behind the test pin.
Adjust the clearance between the Test pin
Tip of rotary hook 7 to - 0.10 to + 0.05 mm 6 by
moving the Rotary hook set plate 3 up or down.
4 Tighten the Screws (A) 1 ,(B) 4 , (C) 2 firmly.
5 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 Gear and
Lower Shaft Gear". (See page 12 )
6 Reattach the bed cover, base cover, base lid, bobbin
holder, needle plate and needle.
1 Screw (A)
2 Screw (C)
3 Rotary hook set plate
Screw (B)
4
5
Test pin
6
- 0.10 to +0.05 mm
7 Tip of rotary hook
11
5 and the