8-3
Error Type Cause
Poor connection of take-
up spring and thread
detector plate
Poor connection & quality
of tension adjusting plate
Bad Motor and bad motor
wiring
Bad connection
Switch failure on tension
adjusting board and bad
circuit board
Bad tape
Inadequate tension on X-
Y belt
Foreign substance in X-Y
rail
Failure of X/Y driver board
Heavy load on frame
Inspection & Repair
Clean the spring and the plate,
or adjust the spring tension.
Check the plate connection and
change the circuit board
Check wiring and change motor
Check connection
Change switch and circuit board
Correct tape
Adjust tension
Clean the rail
Change circuit board
Reduce speed of main shaft
Reference
Poor detection
of upper thread
Bad jump
Bad stitch
quality
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