8-3
Error Type Cause
Failure of thread detecting
roller
Poor connection & quality
of tension adjusting plate
Short-circuit of fuse for
jump circuit
Bad solenoid and bad
solenoid 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
Disassemble the roller and clean
the roller and bush bearing.
Check the plate connection and
change the circuit board
Change front fuse F3 in joint
board
Check wiring and change
solenoid
Check connection
Change switch and circuit board
Correct tape
Adjust tension
Clean the rail
Change circuit board
Reduce speed of main shaft
Check fuse spec
Reference
Poor detection
of upper thread
Bad jump
Bad stitch
quality
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