Common Fault Diagnosis Methods for CNC Machining Centers

CNC machining centers are widely used equipment in the parts processing industry. During the operation of high-precision machining centers, abnormal faults are inevitable due to long-term machine wear, harsh operating environments and other factors. When a high-precision machining center breaks down, how should users deal with it? Below, a professional machining center manufacturer gives a detailed introduction to common fault diagnosis methods.

1. Measurement and Comparison Method for Common Faults of CNC Machining Centers

There are many test terminals on the circuit board of the CNC system of a CNC machining center, which are reserved for maintenance personnel. Once a fault occurs, measure the voltage or waveform of the relevant terminals and compare them with those under normal conditions to determine the fault. Generally speaking, the maintenance data provided by CNC machining center manufacturers contains standard voltage and waveform parameters. Comparison can also be made with another identical machine tool if available. In addition, maintenance personnel should accumulate relevant experience and data in daily work.

2. PLC Interrupt State Analysis Method for Common Faults of CNC Machining Centers

PLC serves as the intermediate link for signal transmission between the NC system and the CNC machining center. If the PLC fails, the CNC machine tool cannot operate normally. When a PLC fault occurs, the interrupt cause is recorded in the interrupt stack. With a PLC programmer, the interrupt stack can be called up when the system is stopped, and the fault location can be determined according to the indicated cause.

3. Spare Parts Replacement Method for Common Faults of CNC Machining Centers

When a fault occurs in the CNC system of a machining center and a suspicious component cannot be confirmed defective, replace it with an identical part for testing. This method can determine whether the replaced component is faulty. It is worth noting that the settings on the replacement board must be consistent with the original one; otherwise, serious consequences may be caused. It is also necessary to analyze the impact of surrounding circuits on the replacement board to avoid damage. Spare parts can be sourced from inventory or functionally identical components on the same machine tool.