Fault diagnosis principle first external and then internal, with the continuous improvement of the control system of EDM machine tool, the probability of failure in the control part is getting smaller and smaller. Most of the failures are not caused by the single-board machine or other core parts of the control and trigger circuit, but due to the damage of external circuits or devices. Therefore, maintenance personnel should start from the outside and gradually investigate the inside. Do not disassemble randomly. characteristics of cnc wire cutting machine Common fault diagnosis and troubleshooting methods characteristics of cnc wire cutting machine Fault diagnosis principle first external and then internal; With the continuous improvement of the control system of the EDM machine tool, the probability of failure of the control part is getting smaller and smaller, and the majority of the failure is not caused by the single board machine or other core parts of the control and trigger circuit, but due to the damage of the external circuit or device. Therefore, maintenance personnel should start from the outside and gradually investigate the inside. Do not arbitrarily remove the trigger circuit board, change the system parameter Settings, arbitrarily adjust the operating mode, etc., which may lead to new faults.

First mechanical after electrical, EDM machine tools are prone to mechanical failures, and these failures are often not easy to be found, and the failure caused by wearing parts is a typical example. Therefore, maintenance personnel should focus on the local scope of failure, first start from the mechanical part, carefully observe, and carefully investigate the fault, such as whether there are cracks, loosening, breakage, fragmentation, etc. Instead of immediately checking whether the circuit is open, short circuit, whether the components are damaged and other electrical faults.

After theory and practice, the control circuit of the EDM machine tool is relatively not too complex, which makes some maintenance personnel do not look at the schematic provided by the manufacturer, do not analyze the root cause of the fault, and blindly carry out live maintenance operations, which will lead to further expansion of the fault. On the basis of understanding the fault situation, the maintenance personnel should carefully analyze the cause of the fault, theoretically clarify the method to solve the fault, and then put it into practice.

First simple and then complex, some failures are caused by a variety of factors. At this time, you should follow the first simple and then complex procedures, solve the small fault first, properly handle these hidden dangers, and then solve the difficult fault. When solving a difficult fault, it should also be broken into pieces, first solve its simple part, and then deal with the complex part. Often after the simple problem is solved, the difficult problem may also be solved.

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