Upper Thread Run Out - Brother HE-800B Service Manual

11-13. Upper thread run out

Items with a "*" in the "Page" column should only be handled by a qualified technician.
Cause
Upper thread trimmer
assembly
Check
Installation position
upper thread trimmer
assembly
Upper thread trimmer
assembly holding force
Opening cam position
of Adjust the installation position of upper thread trimmer
assembly by moving the setting plate assembly.
・ Upper thread
adjustment
・Upper thread trimmer cutting depth adjustment
Adjust so that the thread does not come out when you
cut it with trimmer and hold the end of the thread
between your fingers and gently swing the assembly.
・Bend the trimmer U or replace them so that the
correct force is applied.
・Repair any damage from striking the needle.
Adjust the position so that the trimmer does not touch
the opening cam when the work clamp is lowered.
HE-800B
11. TROUBLESHOOTING
Remedy
trimmer longitudinal
Cotton yarn #60
Holding force approx. 2N
Approx. 0.5 mm
(Continued on next page)
Page
position
98, 99
4005Q
–
4006Q
101
4107M
156