MECHANICAL ADJUSTMENT
(FOR MODELS JF1018S, JF1014 AND JF1012)
DISENGAGEMENT OF CAM FOLLOWER (2)
CORRECT SETTING
TOO NARROW CLEARANCE BETWEEN THE CAM FOLLOWER AND THE TOP CONVEX OF
ZIGZAG CAM MAY OFTEN CAUSE DIFFICULTLY IN TURNING THE PATTERN SELECTOR DIAL.
CAN NOT SELECT CORECT PATTERN OR ZIGZAGING IN STRAIGHT STITCH SETTING.
TO ADJUST
1.
REMOVE THE FRONT COVER. (SEE PAGE 5.)
2.
MOUNT THE PATTERN SELECTOR DIAL, AND SET IT AT PATTERN “B”. (5TH CAM AS
VIEWED DROM C.)
3.
TURN THE BALANCE WHEEL TO PUT THE CAM FOLLOWER ONTO THE TOP CONVEX OF
THE ZIGZAG CAM.
4.
LOOSEN THE SET SCREW.
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 SET SCREW.
NOTE:
AFTER THIS ADJUSTMENT, CHECK THAT THE CLEARANCE BETWEEN THE ZIGZAG CAM
AND THE CAM FOLLOWER IS 0.3 mm WHEN THE CAN FOLLOWER RELEASING ARM HAS
REMOVE TO POSITION (B) BY TURNING THE PATTERN SELECTOR DIAL
COUNTERCLOCKWISE, AND ALSO THE CLEARANCE BETWEEN THE CAM FOLLOWER
AND THE ZIGZAG CAM SHOULD BE 0.3 mm.
6.
REMOVE THE PATTERN SELECTOR DIAL, AND MOUNT THE FRONT COVER.
CAM FOLLOWER
CAM FOLLOWER
RELEASIG ARM
SET SCREW
CONVEX PART
PATTERN SEECT CAM
ZIGZAG CAM
POSITION A
POSITION B
0.3 mm
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