Welding robots can adapt to various welding processes, including arc welding, resistance welding, and spot welding. Welding robots are mainly used to improve production efficiency, but long-term use of welding robots may cause some malfunctions. Share the following points about the analysis of possible causes of welding robot faults:
1. The battery for data storage on the robot encoder is either dead or damaged. Remove the battery installation box for encoder pulse data storage, and measure the voltage of each battery in the battery box, which is below 1.4V. The battery voltage is significantly low. Replace the battery with a new one, and then reset the fault.
2. The servo amplifier control board in the controller has malfunctioned. Check the two DC link voltage detection screws above the servo amplifier LED to confirm the DC link voltage. If the voltage is higher than 50V, the servo amplifier control board is in an abnormal state. If the voltage is below 50V, it can be preliminarily determined that it is in a normal state. Further observation of the LED color of the servo amplifier control board confirms that the power voltage output is normal, there is no external emergency stop signal input, and communication with the robot motherboard is normal, which can rule out damage to the servo amplifier control board.
3. Check the external cable connections RM1 and RP1 between the robot controller and the robot body due to line damage. RM1 represents the power supply and brake control line of the robot servo motor, RP1 represents the signal of the robot servo motor encoder, as well as the control power supply line, end effector line, and battery line for data storage on the encoder. Unplug and check the battery circuit for data storage on the encoder. Unplug the pulse control plug M1P of the M1 motor, and use the same method to check that all M2-M7 motors are 0, which can determine that the battery circuit for data storage on the encoder is damaged.