Adjusting The Installation Height Of The Upper Thread Scissors - Brother HE-800B Service Manual

7-12-6. Adjusting the installation height of the upper thread scissors

1779B
4332Q
1. Turn off the power (with the feed mechanism at the home position), and then slowly move the trimmer driving arm (1)
forward until the driving arm roller (3) is at its highest position on the cam A of the upper thread trimmer lever (2).
2. Loosen the screw (4), and then move the upper thread scissors (5) up or down to adjust the clearance between the upper
thread scissors (5) and the work clamp (6) to approximately 1 mm.
Note:
The work clamp (6) will tilt when sewing joints, so adjust so that the upper thread scissors (5) do not touch it. If the upper
thread scissors touch the work clamp, a work clamp lifter pulse motor error may occur.
* If the tilting of the work clamp (6) causes skipped stitches to occur when sewing material joints, use the accessory
auxiliary sheet (7) as shown in the illustration.
HE-800B
7. ADJUSTMENT
1782B
4333Q
100