21
0.3mm
Setscrew (A)
Pattern selector cam
ZZ cam
Adjusting
plate
Release arm
Release arm
MECHANICAL ADJUSTMENT
BARTACK FEED OF BUTTONHOLE
TO CHECK:
Too narrow clearance between the cam follower and the top convex of zigzag cam may often cause difculty in
turning of the pattern selector dial, or can not correct pattern.
ADJUSTMENT PROCEDURE:
1. Set the pattern selector dial " ".
2. Remove the front cover (See page 6).
3. Put the cam follower to the zigzag cam (straight cam), and also put the cam follower releasing arm to the
pattern select cam.
4. Loosen the setscrew.
5. Move adjusting plate in the direction of arrow until to touch to the releasing arm and tighten setscrew.
NOTE: After this adjustment, check that the clearance between the zigzag cam and the cam
follower releasing arm onto position (A) of pattern select cam.
6. Attach the front cover.
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