Inspection and
Adjustment
Inspection and
Adjustment
4 - 37
Adjustment BH stitch bar tack feed distance
[Standard]
At pattern selection dial [1] (buttonhole stitch bar tack) and stitch length dial [F], Set the BH
presser, when the bar tack sewing is executed to the double broadcloth with a schappe spun
thread #60, the stitch bar tack feed distance should be 1 mm or less when sewing at 10 pitches.
[Adjustment]
1. Turn off the power, and then remove the foot controller.
2. Remove the face plate and the pattern selection dial, and remove the front cover and
the rear cover.
3. Attach the size 90/14 needle.
4. Attach the pattern selection dial.
5. Turn the pattern selection dial until the [1] is the topmost
position.
6. Turn the
stitch length dial
until the [F] is the topmost position.
7. Pull down the BH lever to the downmost, and then switch the
position to the rear side by pushing the BH lever from the front
to the rear.
8. Set the BH foot.
9. Attach the foot controller, and turn on the power.
10. Execute the bar tack sewing to the double broadcloth with a
schappe spun thread #60, and check the stitch bar tack feed
distance (the upper side and the lower side).
*Key point
• Sew the bar tack of the buttonhole till the last. (Fig. 1 “1”)
When this sewing is stopped halfway, the next bar tack of the buttonhole is not sewn correctly.
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Need to adjust “4-35 Left reverse stitch of buttonhole stitch length” before this adjustment.
Pattern
selection dial
Stitch length dial
Pulley
Check
Check
1
Fig. 1
Schappe spun thread #60
BH lever
BH foot
Broadcloth (double)
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