39
Adjustment of respective parts
12.Buttonhole sewing
Difference of stitches at right and left
[Condition]
Presser foot: Buttonhole foot
Buttonhole stitch adjuster: Center
<SD>
Pattern selection dial: "1" to "4"
<2D>
Pattern selection dial: "11" to "14"
<3D>
Pattern selection dial: "8"
[Diagnosis]
1. When about 50 stitches have been stitched
each at right and left sides of buttonhole,
measure the difference of stitches at right and
left.(Fig. 1)
[Standard]
Left: 35 stitches, standard
Right: 30 to 41 stitches
Feeding amounts are nearly the same at right
and left (Fig. 1)
* Make adjustment if the diagnosis result fails to
meet the standard.
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Turn the adjustment screw, eliminate the
difference of stitch numbers at right and left.
(SD: Fig. 2, 2D/3D: Fig. 3)
When the stitches at left is coarser than the
right, turn the screw to right.
When the stitches at right is coarser than the
left, turn the screw to left.
* Repeat the adjustment till the standard is met.
Differential width at right and left
(SD, 2D only)
[Condition]
Presser foot: Buttonhole foot
Buttonhole stitch adjuster: Center
<SD>
Pattern selection dial: "1" to "4"
<2D>
Pattern selection dial: "11" to "14"
[Diagnosis]
1. When about 50 stitches have been stitched
each at right and left sides of buttonhole,
measure the difference of stitch width at right
and left.(Fig. 4)
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