Brother International HE-800A Instruction Manual - English - Page 82

Adjusting the inner rotary hook and rotary hook holder overlap, Adjusting the work clamp pressure,

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10. STANDARD ADJUSTMENTS １０-４. 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). 3977Q １０-５. 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. 3978Q １０-６. Adjusting the cutter installation Lowest position Top of needle plate Lowest 1.5 - 2.0 mm position Top of needle plate 3979Q 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. 0.3 mm 3980Q HE-800A 74

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HE-800A
10. STANDARD ADJUSTMENTS
74
１０
-
４
. 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).
１０
-
５
. 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.
１０
-
６
. 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