MECHANICAL ADJUSTMENT
(FOR MODEL JF1004)
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 “E ”. (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.
0.3 mm
POSITION B
POSITION A
CAM FOLLOWER
RELEASING ARM
CAM FOLLOWER
CONVEX PART
C
PATTERN SELECT CAM
ZIGZAG CAM
23
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