Numerical Control System Fault Diagnosis General Methods
Numerical control system (NC) is an important part of modern industrial automation. It is one of the key technologies in the automation of factories and workshops. It has been widely used in all kinds of production processes and manual operations, because of its high degree of automation, easy operation and high reliability. In the NC system, fault diagnosis is one of the most important parts.
Fault diagnosis, mainly by finding the fault location in time, to eliminate the negative effects of the fault to the production process, and ensure the production process running normally and steady. Generally, the fault diagnosis is divided into two parts: fault location and fault analysis. Fault location, is mainly through the comparison of the fault symptoms and fault model to judge the fault range, static or dynamic test is used to freeze fault signal, and finally through the range of fault source, to find the exact fault location and content. Fault analysis, is to treat the fault location as the starting point, trying to get the causes of the fault, so that it can be solved by reforming system parameters, and lead to normative operation.
The fault diagnosis of numerical control systems follows a certain procedure. First of all, according to the fault phenomenon and the fault code of the numerical control system, the fault range can be determined. Secondly, the parameters of the numerical control system are measured, sampled and analyzed to judge the specific fault location. Finally, the measured data is compared with the numerical control library, so as to determine the fault of the numerical control system and provide a solution.
The fault diagnosis of numerical control systems mainly focuses on two aspects: hardware fault diagnosis and software fault diagnosis. For hardware fault diagnosis, we should first diagnose the power system, spindle drive system, servo system and other electrical systems, and then observe physical components such as main board, stepper motor, servo motor, ball screws, and then diagnose the fault of numerical control system. If it is software fault, we should first analyze the instruction instructions and parameter settings, then monitor various signal and action signals, and finally deal with the faults in the program and system software.
The efficiency of fault diagnosis is affected by a series of factors, mainly including: fault symptoms, fault meaning, fault range and fault analysis, system design, main board design and technical parameters, signal acquisition and signal analysis, system fault analysis and fault countermeasures.
The above is a brief introduction to the general methods of NC system fault diagnosis. Improving the skills and accuracy of fault diagnosis can effectively reduce the maintenance cost and loss caused by equipment failure. It is of great significance to improve the production quality and maintain the normal operation of the production process.
