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12.Error E306
12-1)Needle thread clamp pulse
1-A) There is a certain obstacle in
Check the mechanical block to see if there is any
Needle thread clamp position error
motor fails to properly work.
the mechanical block.
position with a heavy load or any section caught
by something.
1-B) The driver circuit is out of order.
Replace the MAIN board.
1-C) Motor defective
Measure the resistance of the motor winding by means
of a circuit tester.
12-2)The sensor is not turned ON.
2-A) Sensor defective
Check the sensor with the check program I_03.
2-B) Disconnection of connector
Check CN66 of INT board.
2-C) Sensor mounting inadequate
Check the operation with the check program I_08.
13. Error E730
13-1)Main shaft motor: No signal
1-A) The motor is out of order.
Confirm whether each signal is delivered to CN14 of
Main shaft motor encoder error
entry in Phase A and Phase B.
the SDC board.
LED3 on SDC board: Flashing
CN14_6: Phase A
3 times
CN14_7: Phase B
CN14_2: GND
Replace the motor if there is no signal change as a
result of manual turning.
1-B) The signal input circuit is out
Replace the SDC board.
of order.
14. Error E731
14-1)Main shaft motor: No signal
1-A) The motor is out of order.
Confirm whether each signal is delivered to CN14 of
Main shaft motor encoder error
entry in Phase U, Phase V,
the SDC board.
LED3 on SDC board: Flashing
and Phase W.
CN14_3: Phase U
4 times
CN14_4: Phase V
CN14_5: Phase W
CN14_2: GND
Replace the motor if there is no signal change as a
result of manual turning.
1-B) The signal input circuit is out
Replace the SDC board.
of order.
15. Error E733
15-1)The main shaft motor is
1-A) Motor revolutions are unstable.
Check whether coupling for connection of main shaft
Main shaft motor reverse turn
reversing.
and motor is loose.
error
LED3 on SDC board: Flashing
7 times
Replace the motor.
16. Error E811
16-1)Power source voltage is
1-A) There are variations or unusual
Check the AC input power line.
Overvoltage error
beyond 280 V AC.
rise in the AC input power line.
LED3 on SDC board: Flashing
8 times
Trouble
Cause (1)
Cause (2)
Check and corrective measures