20
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. SET THE PATTERN SELECTOR DIAL AT ( ) AND THE STITCH WIDTH CONTROL
AT ( 5 ).
(THE STITCH LENGTH CONTROL AT ANY POSITION.)
2. REMOVE THE FRONT COVER (SEE PAGE 6).
3. PUT THE CAM FOLLOWER TO THE ZIGZAG CAM (STRAIGHT CAM), AND PUT THE
CAM FOLLOWER RELEASING ARM TO THE PATTERN SELECT CAM.
4. LOOSEN THE SCREW.
5. PUSH THE ADJUSTING PLATE IN THE DIRECTION OF ARROW UNTIL IT TOUCHES
THE RELEASING ARM AND TIGHTEN SET SCREW.
NOTE: AFTER THIS ADJUSTMENT, CHECK THAT THE CLEARANCE BETWEEN THE
ZIGZAG CAM AND THE CAM FOLLOWER IS ABOUT 0.3MM WHEN SETTING
THE CAM FOLLOWER RELEASING ARM ONTO POSITION (A) OF PATTERN
SELECT CAM.
6. MOUNT THE FRONT COVER.
NOTE: CHECK THE NEEDLE MOVEMENT FOR STRAIGHT STITCH.
CAM FOLLOWER
RELEASING ARM
CAM FOLLOWER
ZIGZAG CAM
PATTERN SELECT CAM
POSITION (A)
ADJUSTING
PLATE
SCREW
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