In the inquiry and investigation of Dalian automatic machining, when receiving the information of troubleshooting on the machine tool site, the operator should first ask the operator to keep the on-site fault state as far as possible without any treatment, which is conducive to the rapid and accurate analysis of the cause of the fault. To verify the accuracy of the preliminary judgment. Due to the level of the operator, there are many examples of unclear or even completely inaccurate description of fault conditions.

Therefore, after arriving at the site, do not rush to deal with it, and carefully investigate various situations again, so as not to damage the site and increase the difficulty of troubleshooting. Some faults are often complex and require a series of preparations, such as preparation of tools and instruments, local disassembly, repair of parts and components, procurement of components and even formulation of troubleshooting plan steps, etc. Measure relevant DC and pulse signals to find possible faults.

For example, check the power supply with a multimeter, measure the relevant signal status measurement points set on some circuit boards, observe the amplitude, phase and even presence of relevant pulsating signals with an oscilloscope, and find out the fault position and cause in the PLC program with a PLC programmer. The faults in PLC program and processing program are usually equipped with alarm display. According to the displayed alarm number, the possible fault causes and troubleshooting methods can be known by comparing with the corresponding diagnosis instruction manual.

Any parameter change (especially analog parameter) or even loss is not allowed; The changes of mechanical or electrical properties caused by the long-term operation of the random bed will break the initial matching state and optimization state. The exchange of command board or servo board of two coordinates determines the fault board or fault position.

This cross transposition method should pay special attention not only to the correct exchange of hardware wiring, but also to exchange a series of corresponding parameters. Otherwise, it will not achieve the purpose, but will produce new faults and cause confusion of thinking. We must consider carefully in advance, design the software and hardware exchange scheme, and check the exchange again after it is accurate.