-57-
26.
FORWARD AND REVERSE STITCH LENGTH
(STRAIGHT LINE STITCH LENGTH)
STANDARD
When the feed dial is to set to 2, there should be no difference between the stitch length for forward and reverse.
ADJUSTMENT
1.
Turn the selection dial and the Zigzag dial to medium straight line sewing.
2.
Set the feed dial to 2.
3.
Lay normal paper under the presser foot, turn the balance wheel, sew in the forward direction, and check
the stitch length then, at another position, while pressing the reverse sewing button, turn the balance wheel,
sew in the reverse direction, and compare the reverse stitch length with the forward stitch length.
4.
Adjust the reverse sewing lever A adjustment screw to match the lengths for forward stitches and reverse
stitches.
Adjustment Point
4.
Turning the adjustment screw to the right increases the length for reverse stitches.
27.
INNER ROTARY HOOK TENSION
STANDARD
The inner rotary hook tension should be 0.1 N - 0.12 N (10-12 gf) when #60 polyester thread is pulled slowly with
the tension gauge.
ADJUSTMENT
1.
Correctly mount a bobbin with polyester thread (#60, green) on the inner rotary hook, then check the tension
by pulling the thread slowly with the tension gauge in the direction shown on the figure.
2.
Turn the spring adjustment screw left and right with the driver to adjust to the inner rotary hook tension.
3.
Check the inner rotary hook tension again with the method in 1.
4.
After the adjustment, paint the adjustment screw with oil-based paint so that the inner rotary hook tension
will not change.
#60 polyester thread
