JUKI LK-1900AN, Руководство инженера

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Trouble Cause (1) Cause (2) Check and corrective measures
8. Error E306
Needle thread clamp sensor error
8-1) Irregular motor rota-
tions
1-A) There are irregularities in the
mechanism, such as over-
loading, etc.
Check the mechanism and look for the sec-
tion that is particularly overloaded or whether
screws are loose.
1-B) Motor leads are broken.
The motor is out of order.
Disconnect CN45 (yellow) of the MAIN board
and check the motor resistance. [See the
Pulse Motor/Solenoid Circuit Diagram.] Re-
place the motor.
8-2) No sensor signal entry
Use of Test Mode
CP-1 or CP-2
2-A) The sensor is out of order or
broken.
Check whether the sensor lamp is turned ON/
OFF when a metallic plate is moved closer
to or separated from the sensor plane. In the
case of no lamp ON/OFF, the sensor is bro-
ken or the connector block is disconnected.
2-B) The INT board connector is
disconnected.
Check the connection of CN65 (yellow) of the
INT board.
2-C) Sensor mounting position is
inadequate.
Check and correct the sensor mounting posi-
tion.
9. Error E730
Main shaft motor encoder error A
LED3 on SDC board: Flashing 3 times
9-1) Phase A and Phase
B signals (main shaft
motor) do not enter.
1-A) The encoder cord is broken
or out of order.
Confirm whether each signal is delivered
to CN14 of the SDC board. In the case of
encoder error, replace the motor as a whole.
[See the Servo Motor Circuit Diagram.]
1-B) There is internal disconnec-
tion in the SDC board.
Replace the SDC board.
10. Error E731
Main shaft motor encoder error B
LED3 on SDC board: Flashing 4 times
10-1) Position signals U, V,
W (main shaft motor)
do not enter.
1-A) The encoder cord is broken
or out of order.
Confirm whether each signal is delivered
to CN14 of the SDC board. In the case of
encoder error, replace the motor as a whole.
[See the Servo Motor Circuit Diagram.]
1-B) There is internal disconnec-
tion the SDC board.
Replace the SDC board.