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DISENGAGEMENT OF CAM FOLLOWER
To check:
Too narrow clearance between the cam follower and the top convex of zigzag cam may often
cause difficulty in turning of the pattern selector dial, this can also cause unintended patterns to
become selected or make zigzag stitch in straight stitch setting.
Adjustment procedure:
1.
Remove the front cover (See page 6).
2.
Mount the pattern selector dial, and set it at pattern "
3.
Turn the handwheel to put the cam follower onto the top convex of the zigzag cam.
4.
Loosen the setscrew.
5.
Push the convex part of the cam follower releasing arm in the direction of arrow until the
cam follower releasing arm touches to position (A) of the pattern select cam, and then,
tighten the setscrew.
NOTE: After this adjustment, check that the clearance between the zigzag cam and the
cam follower is 0.3mm when the cam follower releasing arm has removed to position
(B) by turning the pattern selector dial counterclockwise, and also the clearance
between the cam follower and the zigzag cam should be 0.3mm.
6.
Remove the pattern selector dial, and mount the front cover.
Zigzag cam
Pattern select cam
Position (B)
MECHANICAL ADJUSTMENT
Cam follower
(C)
Position (A)
". (5th cam as viewed from (C))
0.3 mm
Cam follower releasing arm
Setscrew
Convex part
21
MODEL BL9
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