CNC machine tool troubleshooting method - Solutions - Huaqiang Electronic Network

Filter 18.432M

Due to the frequent participation in maintenance tasks, some maintenance experience, combined with the relevant theoretical aspects, listed below, I hope to throw a brick.
(1) Initial reset method: Under normal circumstances, due to system alarm caused by transient fault, hardware reset or switch system power supply can be used to clear the fault in turn. If the system working storage area is powered down, plugging or unplugging the circuit board or battery undervoltage If it is confusing, the system must be initialized and cleared. Before cleaning, pay attention to making a copy of the data. If the fault cannot be eliminated after initialization, perform hardware diagnosis.
(2) Parameter change, program correction method: System parameter is the basis for determining system function. If the parameter setting is wrong, it may cause system failure or invalid function. Sometimes due to user program errors can also cause downtime, you can use the system's block search function to check and correct all errors to ensure their normal operation.
(3) Adjustment, optimization adjustment method: adjustment is one of the easiest and most convenient methods. Correct system failure by adjusting the potentiometer. If a factory is in maintenance, its system display screen is chaotic and normal after adjustment. For example, in a factory, the main shaft has belt slippage during starting and braking, because the main shaft load torque is large, and the ramp-up time of the driving device is set too small, and it is normal after adjustment.
The optimization adjustment is a comprehensive adjustment method that systematically achieves the best match between the servo drive system and the driven mechanical system. The method is very simple, using a multi-line recorder or a dual-track oscilloscope with storage function, respectively Observe the response relationship between the command and speed feedback or current feedback. By adjusting the speed factor and integration time of the speed regulator, the servo system can reach the optimal working state with high dynamic response characteristics without oscillation. In the absence of an oscilloscope or recorder on site, according to experience, the adjustment causes the motor to start to oscillate, and then slowly adjusts in the reverse direction until the oscillation is eliminated.
(4) Replacement of spare parts: replace the bad circuit board with a good spare part, and make the corresponding initial start, so that the machine tool can be put into normal operation quickly, and then the bad board is repaired or repaired. This is the most commonly used troubleshooting method. .
(5) Improvement of power quality method: At present, a regulated power supply is generally used to improve power supply fluctuations. Capacitance filtering can be used for high frequency interference, and these preventive measures are taken to reduce the failure of the power board.
(6) Maintenance information tracking method: Some large manufacturing companies continually modify and improve system software or hardware according to accidental failures caused by design defects in actual work. These modifications are continuously provided to maintenance personnel in the form of maintenance information. As a basis for troubleshooting, this can be completely and completely eliminated.