Buttonhole Adjustment (The Length Of The Buttonhole And The Pressure Of The Bh Lever) - Brother BL6200 Service Manual

22. BUTTONHOLE ADJUSTMENT (THE LENGTH OF THE BUTTONHOLE
AND THE PRESSURE OF THE BH LEVER) (1 STEP BH MODEL)
(B338 ⋅ B341 ⋅ B347 ⋅ B348 ⋅ B349 ⋅ B351 ⋅ B352)
STANDARD
The length of buttonhole should be 21 ~ 23 mm, when the button is 20.0 mm in diameter.
The pressure needed to pull the BH Lever forward should be 50 ~ 110 g.
ADJUSTMENT
1. Loosen the screw on BH change arm.
2. Adjust the position of BH lever according to below drawings.
3. Tighten the screw.
4. Loosen the screw for the eccentric nut.
5. Adjust eccentric nut so that the pressure needed to pull the BH Lever forward is 50 ~ 110 g.
(The eccentric nut should not be rotated more than half a turn.)
6. Tighten the screw.
* Adjust the timing of the BH lever using the BH notch screw.
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