Upper Thread Mis-Trimming; Needle Strikes Upper Thread Trimmer - Brother HE-800A User Manual

-

. Upper thread mis-trimming

Cause
Upper thread Installation
trimmer assembly upper
assembly
Upper
assembly holding force
Trimmer driving arm Upper
cutting depth
-

. Needle strikes upper thread trimmer

Cause
Upper thread Installation
trimmer assembly upper
assembly
upper
operating force
Check
position of Adjust the installation position of upper thread
thread trimmer trimmer assembly by moving the setting plate
assembly.
Upper
adjustment
Upper thread trimmer cutting depth adjustment
thread trimmer Adjust so that the thread does not come out when
you cut it with scissors and hold the end of the
thread between your fingers and gently swing the
assembly.
Bend the scissors U or replace them so that the
correct force is applied.
Repair any damage from striking the needle.
thread trimmer Adjust the position of the trimmer driving arm roller.
Check
position of Adjust the installation position of upper thread
thread trimmer trimmer assembly by moving the setting plate
assembly.
Upper
adjustment
Upper thread trimmer cutting depth adjustment
thread trimmer Remove any scratches and burrs, and adjust the
upper thread trimmer M to open when the projection
is pressed with a force of 4N or less.
HE-800A
Remedy
thread trimmer longitudinal
Cotton yarn #60
Holding force approx. 2N
Remedy
thread trimmer longitudinal
16. TROUBLESHOOTING
Page
position
Service
manual
4005Q
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4006Q
Service
manual
Page
position
Service
manual
4005Q
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4010Q
102