19
MECHANICAL ADJUSTMENT
DISENGAGEMENT OF CAM FOLLOWER
TO CHECK:
IF THE CLEARANCE BETWEEN THE CAM FOLLOWER AND THE TOP CONVEX OF THE
ZIGZAG CAM IS NOT ENOUGH, THE PATTERN SELECTOR DIAL IS BLOCKED OR WILL
NOT SELECT THE CORRECT PATTERN.
ADJUSTMENT PROCEDURE:
1.
REMOVE THE FRONT COVER (SEE PAGE 3).
2.
SET THE PATTERN SELECTOR DIAL AT PATTERN " ".
3. PUT THE CAM FOLLOWER TO THE ZIGZAG CAM AND PUT THE CAM FOLLOWER
RELEASING ARM TO THE PATTERN SELECTOR 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
POSITION (A) OF THE PATTERN SELECTOR CAM, AND THEN, TIGHTEN THE
SETSCREW.
NOTE:
AFTER THIS ADJUSTMENT, CHECK THAT THE CLEARANCE BETWEEN THE
ZIGZAG CAM AND THE CAM FOLLOWER IS ABOUT 0.3 MM WHEN SETTING
THE CAM FOLLOWER RELEASING ARM ONTO POSITION (B) OF PATTERN
SELECTOR CAM.
6.
MOUNT THE FRONT COVER.
NOTE: CHECK THE NEEDLE MOVEMENT FOR STRAIGHT STITCH.
0.3 MM
CAM FOLLOWER
CAM FOLLOWER RELEASING ARM
SCREW
CONVEX PART
ZIGZAG CAM
PATTERN SELECTOR CAM
POSITION (A)
POSITION (B)
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