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

4-14-6. Adjusting the installation height of the upper thread scissors

4325Q
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 (5) touch the work clamp (6), the work clamp lifter pulse motor may get out of
step.
* 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-800A
4. ADJUSTMENT
4331Q
4333Q
93