Left Reverse Stitch Of Buttonhole Stitch Length - Brother XM3700 Service Manual

Adjustment
Need to adjust "4-30 Feed distance" before this adjustment.
[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 standard is as follows.
• The number of left reverse stitch/right forward stitch should be 35 to 50 stitches per 20 mm.
• The stitch difference should be within ±10 stitches.
[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. Set the slot of the BH adjusting dial in the vertical direction.
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Left reverse stitch of buttonhole stitch length

Stitch length dial
Pulley
Pattern
selection dial
4 - 35
Vertical direction
BH adjusting dial