1. Faults with alarm display. The fault of CNC machine tool of CNC system is the fault with indicator light display. The indicator light display alarm refers to the alarm displayed by the status indicator light (generally composed of ledv light tube or small indicator light) on each unit of the control system.
2. Failure without alarm display. When this kind of fault occurs, the machine tool and the system have no alarm display, and its analysis and diagnosis are usually difficult, which can only be confirmed through careful and careful analysis and judgment. Especially for the CNC system, because the diagnosis function of the system itself is not strong, or there is no PLC alarm information text, there are more faults without alarm display. For the non alarm display fault, it is usually necessary to analyze the specific situation and make analysis and judgment according to the changes before and after the fault. The principle analysis method and PLC program analysis method are the main methods to solve the non alarm display fault.
