Motor failure
Failure phenomenon: The motor cannot start, the motor overheats, and there is abnormal vibration or noise when the motor is running. Failure to start may be due to power supply problems, driver failure or motor failure; motor overheating may be due to excessive load, poor heat dissipation or motor winding short circuit; abnormal vibration or noise may be due to improper motor installation, poor shaft concentricity or damage to internal motor components.
Solution: For failure to start, first check whether the power supply is normal, check the alarm information of the driver (if any), and then check whether the power line of the motor is connected correctly. For motor overheating, check whether the load exceeds the rated load of the motor, check the ventilation and heat dissipation of the motor, and if the motor winding is suspected of short circuit, you can use an insulation resistance meter to measure the insulation resistance of the motor winding. For abnormal vibration or noise, recheck the installation of the motor and adjust the concentricity of the shaft. If you suspect that the internal components of the motor are damaged, you may need to disassemble the motor for inspection or replace the components.
Driver failure
Failure phenomenon: Driver alarm (such as overcurrent alarm, overvoltage alarm, undervoltage alarm, etc.), motor operation is unstable or uncontrollable. Overcurrent alarm may be caused by load short circuit, motor stall or driver failure; overvoltage alarm may be caused by too high power supply voltage or brake circuit failure inside the driver; undervoltage alarm may be caused by too low power supply voltage or power circuit failure inside the driver.
Solution: For overcurrent alarm, first check whether the load is short-circuited and whether the motor is stalled. If the alarm still occurs after eliminating these conditions, the power module inside the driver may be damaged and needs to be repaired or replaced. For overvoltage alarm, measure whether the power supply voltage is too high and check whether the brake circuit of the driver is normal. For undervoltage alarm, check whether the power supply voltage is within the normal range required by the driver and check whether the power circuit components inside the driver (such as capacitors, transformers, etc.) are damaged.
Encoder failure
Fault phenomenon: inaccurate motor positioning, unstable speed control or encoder-related alarm information. It may be that the encoder is damaged, the signal line between the encoder and the driver is poorly connected, or the encoder is contaminated.
Solution: Check whether the signal line between the encoder and the driver is firmly connected and whether the signal line is disturbed. If the encoder is suspected to be contaminated, you can clean the encoder. If the problem still exists after the above inspection, the encoder itself may be damaged and the encoder needs to be replaced.
