59
Poor Upper
Thread Detection
Defective Jump
Twisted
Embroidery
① Defective roller rotation
② Inappropriate contact of the
thread tension adjusting
plate to the connector and
the inappropriate operation
of the thread tension
adjusting plate
① Faulty SMPS for jump
② Faulty jump motor wiring
terminal and jump motor
③ Bad connector contact
④ Faulty switch on the thread
tension adjusting plate and
defective board
① Bad tape
② Inappropriate X-Y belt
tension
③ Foreign material stuck on
the X-Y rail
④ Bad X-Y driver
⑤ Heavy embroidery frame
■ Disassemble the body of the
thread sensing roller and
clean the thread sensing
roller and the bush bearing
■ Check the contact status of
the connector line on the
tension adjusting plate, and
replace the board
■ Replace the SMPS for jump
within the controller box
■ Check the wiring terminal
and replace the jump motor
■ Check the contact status of
the conductor
■ Replace the switch and the
board
■ Correct the tape
■ Adjust the tension
■ Clean the rail
■ Replace the driver
■ Slow down the speed of the
main shaft rotation
■ Check the rated
voltage of the fuse
1) For 3-phase
= 250V 15A
2) For 1-phase
= 250V 30A
Corrective Action and Check PointCause of TroubleType Remarks
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