Brother HE-800A - Manual (Page 82)

HE-800A
10. STANDARD ADJUSTMENTS
74
ውዌ-ዐ. Adjusting the inner rotary hook and rotary hook holder overlap
Loosen the two screws (3) to adjust so that the tip of
the rotary hook holder (1) does not protrude past the
edge A of the inner rotary hook (2).
ውዌ-ዑ. Adjusting the work clamp pressure
The standard distance A is 30 mm (approximately 30
N).
Loosen the nut (1) and turn the adjusting screw (2) to
adjust the work clamp pressure.
ውዌ-ዒ. Adjusting the cutter installation
1. Install the cutter with the screw (1) so that the tip A
of the cutter blade is aligned with the top of the
needle plate when the cutter is pressed down by
hand to its lowest position.
* If using the flat cutter (2), install with the screw (1)
so that there is a clearance of 1.5 - 2.0 mm
between the cutter and the top of the needle
plate.
Note:
࡮When the cutter is driven by the solenoid, the
movement will be approximately 2 mm greater
than that shown in the illustration.
࡮If the cutter does not cut properly, the cutter may
get stuck in the material and not return. If this
happens, replace or sharpen the cutter.
A special needle plate which helps to prevent
the cutter from getting stuck and which helps
maintain the cutting edge is available as an
option. (Refer to “3. OPTIONAL PARTS”.)
2. Loosen the two screws (4), and move the cutter
holder (5) to adjust so that the clearance between
the cutter and the needle bar (3) is 0.3 mm.
* Check that the needle bar (3) does not touch the
cutter when it moves sideways.
3977Q
3978Q
3979Q
Lowest
position
Top of needle plate
Lowest
position
Top of needle plate
1.5 – 2.0 mm
0.3 mm
3980Q