What are the common faults and causes of the CNC system in the work?

CNC system and related automation products are mainly used for supporting CNC machine tools. CNC machine tools are the mechatronic products formed by the infiltration of new technologies represented by numerical control systems into the traditional machinery manufacturing industry: CNC machines equipped with machine tools have greatly improved the accuracy, speed, and efficiency of parts processing.

Common faults and causes:

Position loop: This is the key link for the CNC system to issue control commands and compare it with the feedback value of the position detection system to further complete the control task. It has a high frequency of work and is connected to peripherals, so it is prone to failure.

Common faults are:

One-position control loop alarm: The measurement loop may be open; the measurement system is damaged, and the position control unit is internally damaged.

2 Movement without command, may be excessively high drift, positive feedback, malfunction of the position control unit; damage to the measuring element.

3 Measurement element failure, generally showed no feedback value; the machine tool can not return to the reference point; high-speed leakage pulse may cause alarm because grating or read head is dirty; grating is broken.

Servo drive system: The servo drive system is associated with power grids, mechanical systems, etc., and it has been in frequent start-up and operation states during operation. Therefore, this is also a part with more failures.

Power section: The power supply is the energy support section that maintains the normal operation of the system. The direct result of its failure or failure is to cause the system to shut down or destroy the entire system. Generally speaking, in Europe and the United States, such problems are relatively few. There are not many considerations in designing this aspect. However, in China, due to large power fluctuations and poor quality, such interferences as high-frequency pulses are hidden. The factors (such as sudden power failure, etc.). These reasons can cause power failure monitoring or damage. In addition, part of the numerical control system's operating data, setting data and processing programs are generally stored in the RAM memory. After the system is powered off, it is maintained by the backup battery or lithium battery of the power supply. As a result, the downtime is relatively long, and plugging in and plugging in the power supply or memory may cause data loss and prevent the system from operating.

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