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Processing method for failure of servo machining center of CNC machining center
Jan 14, 2019

The faults of the CNC machining center servo system include alarms such as abnormal alarm indicators on the speed unit in the CNC, blown fuses, and jump switches for various protections. The CNC machining center servo system is a system that provides power to the machine tool. Without the servo system CNC machining center, the workpiece cannot be processed. Therefore, the servo system is very important in the CNC machining center. When the servo system fails, the entire machining production must stop. The following is a common solution to the fault of the CNC machining center servo system.


The meaning of the alarm indicator varies with the design of the speed control unit. Generally, there are the following types:


1. The protection switch activates the alarm. The protection switch is a device for protecting the machine tool. For example, a large voltage will burn some components and some emergency measures that cannot be controlled by the machine tool. When these conditions are encountered, the protection switch will be activated to avoid unnecessary Component damage, similar to a safe stop.


2, the voltage is too low, causing the machine to alarm, the probability of such a machining center is very rare, this may be the input voltage is less than 85 percent of the rated value, or the power connection is not good.


3, the detection speed of the feedback route is broken, causing the alarm. This situation is a false alarm, because the airport has no problem, and the detection feedback system has a problem. Most of the alarms occur are the speed feedback line of the CNC servo motor of the machining center. Broken or caused by poor contact in the detection feedback line.


4, overload alarm, the cause of the overload alarm is that the machining center CNC mechanical load is not normal, or the upper limit of the motor current on the speed control unit is set too low. The permanent magnet on the permanent magnet motor will also cause an overload alarm. If the motor of the machining center without the brake is idling, it will be difficult to turn it by hand or rotate the shaft, which means that the permanent magnet is completely detached.


5. The fuse on the CNC speed control unit of the machining center is blown or the circuit breaker is tripped.


6, the current is large, causing machine tool alarm, high current alarm occurs under normal circumstances, there are two possibilities, that is, the high-current alarm caused by the damage and short circuit of the power drive component on the CNC speed control unit of the machining center.


7, high voltage will also cause machine tool alarms, there are generally three possibilities for high voltage alarms, which may be that the CNC input voltage of the machining center exceeds 10% of the rated value, or the insulation performance of the servo motor is degraded, or The high voltage caused by the line of the machining center operating speed control unit.


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