jagadeeshr
Member
Hardware
PLC: Mitsubishi Q06UDV
Servo Module: Mitsubishi QD77MS2
Servo Amplifier: Mitsubishi MR-JE Series Amplifier
Customer has restarted their production after 1.5 months of lock-down.
Yesterday, I got a call that a servo is not returning to its home position. This servo uses 'Data Set' method as home position return method. The servo is moved to the home position (indicated by a proximity sensor) and a 'Set as Home Pos.' button is pressed on the HMI screen. The current position of the servo is set as 0.
Yesterday, during an auto cycle, the servo had completed its positioning, but had stopped 20 mm below the home position. When the servo was moved to the home position, the position was -21.60 mm. After teaching the home position, we ran a 5 cycles, there were no issues.
Today, when the machine was switched ON, the home position had shifted from 0 to -81.3 mm.
In addition, the servo has a bunch of hardware problems: heating, noise, jerk, and motor current is 40% during idle and > 100% during operation.
I'm not sure what the exact issue is?
Edit: Talked to the programmer who had commissioned this machine. He mentioned that there was some issue with the encoder cable, which was causing the motor to heat up.
PLC: Mitsubishi Q06UDV
Servo Module: Mitsubishi QD77MS2
Servo Amplifier: Mitsubishi MR-JE Series Amplifier
Customer has restarted their production after 1.5 months of lock-down.
Yesterday, I got a call that a servo is not returning to its home position. This servo uses 'Data Set' method as home position return method. The servo is moved to the home position (indicated by a proximity sensor) and a 'Set as Home Pos.' button is pressed on the HMI screen. The current position of the servo is set as 0.
Yesterday, during an auto cycle, the servo had completed its positioning, but had stopped 20 mm below the home position. When the servo was moved to the home position, the position was -21.60 mm. After teaching the home position, we ran a 5 cycles, there were no issues.
Today, when the machine was switched ON, the home position had shifted from 0 to -81.3 mm.
In addition, the servo has a bunch of hardware problems: heating, noise, jerk, and motor current is 40% during idle and > 100% during operation.
I'm not sure what the exact issue is?
Edit: Talked to the programmer who had commissioned this machine. He mentioned that there was some issue with the encoder cable, which was causing the motor to heat up.
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