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Fault principle and analysis method of EDM wire cut

The principle analysis method of EDM wire cut fault is to analyze the cause
of the fault according to the working principle of WEDM, so as to quickly
analyze the solution to the problem. The common principle analysis methods are
as follows.

(1)Divide and conquer

The schematic diagram of EDM wire cut is divided into main circuit and
control circuit according to different functions. The main circuit mainly
includes wire conveying motor and water pump motor circuit. The control circuit
mainly includes trigger circuit, adjustment circuit, driving circuit, single
board computer control circuit, etc. When a fault occurs, the part of the
problem can be analyzed according to the fault phenomenon, which can gradually
narrow the fault scope and shorten the time to solve the fault.

(2) Reverse analysis

When the fault is determined to be in a small range, the reverse analysis
method can be adopted. Assuming what happens when a certain fault occurs (such
as a circuit failure or a circuit short circuit), simulate the fault in theory,
so as to judge the cause of the fault.

(3) Circuit simulation

When the electronic circuit of EDM wire cut breaks down greatly, it is our
common practice to use oscilloscope to check the important link. We can judge
whether the component has been damaged by voltage and waveform. After simple
measurement, it is impossible to judge whether the signal is correct. At this
time, edible electronic circuit simulation software is the best choice, which
can quickly determine whether the circuit components are damaged.

(4) Replacement of spare parts

For some reasons, it is often difficult for maintenance personnel to obtain a
complete electronic circuit diagram. When a major fault occurs, only the general
cause of the fault can be analyzed. Therefore, the maintenance personnel can use
the spare printed circuit board to replace the vulnerable electronic components,
so that the equipment can be put into operation as soon as possible.

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