CNC cutting machine common fault analysis and solution - Database & Sql Blog Articles

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At present, the application of CNC cutting machine is more and more extensive, and its processing flexibility, high precision, high production efficiency, and many advantages. However, due to the increasingly advanced and complex technology, the quality of maintenance personnel is very high. They are required to have deep professional knowledge and rich maintenance experience. In the event of a failure of the CNC cutting machine, it can be eliminated in time. Wuhan Aote Pioneer CNC Technology Co., Ltd. has gained certain experience through the analysis and processing of faults. The following is a systematic analysis of the failure of the CNC cutting machine with reference to some typical examples for reference.
First, the NC system failure
1. Hardware failure Sometimes the machine is shut down due to hardware damage in the NC system. For the diagnosis of such faults, it is first necessary to understand the working principle of the numerical control system and the functions of each circuit board, and then analyze according to the fault phenomenon, and use the exchange method to accurately locate the fault point under certain conditions.
2. Soft faults Some faults of CNC cutting machines are caused by NC system parameters. Sometimes, due to improper settings, sometimes the parameters are changed or confused due to accidents. Such faults will disappear naturally as long as the parameters are adjusted. There are also some faults that cause the NC system to be in an infinite loop due to accidental reasons. Sometimes such faults must be forced to start to restore the system.
Second, the failure of the servo system Because the control core of the CNC system is to digitally control the feeding part of the cutting machine, and the feed is controlled by the servo unit to drive the servo motor and drive the ball screw. The position feedback is performed by the rotary encoder. The component forms a semi-closed position control system. Therefore, the role of the servo system on CNC machine tools is very important. The failure of the servo system is generally caused by problems such as the servo control unit, the servo motor, the speed measuring motor, and the encoder.
Third, external faults Due to the increasing reliability of modern CNC systems, the failure rate is getting lower and lower, and few failures occur. Most faults are non-system faults and are caused by external causes.
Wuhan Aote Pioneer CNC Technology Co., Ltd. reminds customers that finding problems is the first step in solving problems and is the most important step. Especially for the external fault of the CNC cutting machine, sometimes the diagnosis process is more complicated. Once the problem is found, it is easier to solve. For the diagnosis of external faults, we have summarized two experiences. First, we should be proficient in the working principle and sequence of the CNC cutting machine. Secondly, it is necessary to skillfully use the plc ladder diagram provided by the factory, use the status display function of the NC system or use the off-machine programmer to monitor the operating status of the PLC. According to the chain lock relationship of the ladder diagram, determine the fault point, as long as the above two points are achieved, The external fault of the general CNC cutting machine will be eliminated in time.