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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... more