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Poor detection of
upper thread
Bad jump
Bad stitch quality
① Failure of thread detecting
roller
② Poor connection and bad
quality of tension adjusting
plate
① Bad solenoid and solenoid
wiring
② Bad connection
③ Switch failure on tension
adjusting board and bad
circuit board
① Bad tape data
② Inadequate tension on X-Y
belt
③ Foreign substances in X-Y
rail
④ Failure of X/Y drivers
⑤ Heavy load on the frame
■ Disassemble the roller and
clean the roller and bush
bearing.
■ Check the plate connection
and change the circuit board
■ Check wiring and change
solenoid
■ Check connector
■ Change switch and circuit
board
■ Correct tape data
■ Adjust tension
■ Clean
■ Change X/Y drivers
■ Reduce speed of main shaft
rotation
Inspection & Repair CauseError Type Reference
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