Unraveling Of Thread Trimmed By Upper Thread Trimmer Assembly - Brother HE-800A User Manual
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Also See for HE-800A:
- Service manual (162 pages) ,
- Manual del instrucción (122 pages) ,
- Instruction manual (118 pages)
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16. TROUBLESHOOTING
-
. Unraveling of thread trimmed by upper thread trimmer assembly
Cause
Upper thread trimmer
Installation
assembly
upper
assembly
Burr on tips of upper
thread trimmer M and
upper thread trimmer U.
Tension
release
Opening
timing
zigzag tension discs and
bar tack tension discs
(particularly
tension discs)
Work clamp
Work clamp lifting speed
101
Check
position
of
Adjust the installation position of upper thread
thread
trimmer
trimmer assembly by moving the setting plate
assembly.
Upper thread trimmer longitudinal position adjust-
ment
Upper thread trimmer cutting depth adjustment
Polish with buff or replace the part.
amount
of
Adjust the zigzag tension discs by moving the
tension stud bracket in and out.
Adjust the bar tack tension discs opening amount
zigzag
to 0.5 - 1.0 mm by removing the top cover and
moving the tension release cam.
Use memory switch No. 02 to retard the work clamp
lifting speed.
HE-800A
Remedy
Check burr on upper
side here
Check burr here
Zigzag tension
Tack tension
0.5 - 1 mm
Page
Service
manual
4005Q
-
4009Q
-
4008Q
79
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