21
Troubleshooting
7.Improper buttonhole sewing
[Example of phenomenon] [Check item before adjustment]
Is genuine buttonhole foot used?
Is the stitch length dial set at "0.25 to 1.0"? (2D, 3D only)
Is the stitch width lever set at "3 to 5"? (3D only)
Is the presser foot pressure appropriate?
Is the feed dog lifted?
Can it be adjusted by using the buttonhole stich adjuster?
Step Item Diagnosing Method Standard
Reference
Page
1. State of
buttonhole
Difference
between
right and left
stitches
<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>
When about 50 stitches have been
stitched each at right and left sides of
buttonhole, measure the difference of
stitches at right and left.
Left:
35 stitches,
standard
Right:
30 to 41 stitches
Feeding
amounts are
nearly the same
at right and left.
[Adjustment]
page.39
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>
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.
Width must be
the same at
right and left.
[Adjustment]
page.39
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