MODEL 3128
17
BUTTONHOLE FEED BALANCE
TO CHECK:
When sewing buttonhole, the stitches on each side of buttonhole stitch density should be the
same.
The range of 9 - 11 stitches in the right side row
"
backward feeding
"
against 10 stitches in the
left side row
"
forward feeding
"
is considered acceptable.
ADJUSTMENT PROCEDURE:
1. Confirm the stitches by sewing buttonholes, and remove the cap.
2. Turn the adjusting screw in the direction of "C" in case of "A" (right stitches are rough), or
in the direction of "D" in case of "B" (left stitches are rough).
3. Mount the cap.
MECHANICAL ADJUSTMENT
CAP
NOTCH
ADJUSTING SCREW
D
C
FORWARD FEEDING
BACKWARD FEEDING
