Imperfect Cutter Function (Imperfect Material Cutting) - Brother HE-800A Instruction Manual

Cause
Needle plate
Upper thread trimmer
assembly
Cutter
１６-１８. Imperfect cutter function (imperfect material cutting)
Cause
Cutter
Cutter solenoid
Cutter power
Check
Needle plate position
Burr on the screw hole
edge (in event of uneven
material feeding)
Needle strikes upper
thread trimmer
Clearance between
needle bar and cutter
Check
Installation position of
cutter
Cutter blade
Damage to cutter
mechanism parts
Loose screws
Check for a disconnected
cord.
Memory switches
Remedy
Adjust the forward/back position of the needle plate
so that the needle is in the center of the needle hole.
Bisect
Polish with buff.
Check the chamfered side
finishing
(Needle plate cross section)
Refer to "16-16. Needle strikes upper thread
trimmer".
Install the cutter so that the clearance between the
needle bar and the cutter is 0.3 mm.
* The cutter release section of the needle bar should
be at a right angle to the cutter.
0.3 mm
Remedy
Install the cutter so that its edge is aligned with the
top of the needle plate.
If blade is worn or chipped, sharpen it or replace
it.
Replace with the special needle plate (optional).
Replace any parts that are damaged.
Tighten any loose screws.
Connect the cords.
If the material is heavy and difficult to cut, use
memory switch No. 00 to increase the cutting force
of the cutter.
HE-800A
16. TROUBLESHOOTING
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4014Q
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4015Q
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4016Q
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