The pulse power circuit generates the corresponding pulse width and interval through a multivibrator, which is then amplified by transistor Vl. Upon the control unit issuing a pulse power signal, relay K2 engages, allowing the pulse waveform signal to be transmitted to the power amplifier circuit via emitter follower V2. After amplification, it supplies the machine tool for discharge machining. SL is the adjustment switch; when the controller lacks an open pulse signal, pressing SL can force the output of the pulse power. When the wire feeding motor reverses direction, the relay engages, allowing transistor V3 to conduct and shut off the pulse power signal. (1—Current output is too high. The machine tool is generally due to the breakdown of power amplifier tube V5. The normal short-circuit current of the machine tool's pulse power is 0.6-0.8A per power amplifier tube. If it is broken down, it exceeds 3A. The cause of V5 breakdown is often the failure of V6. (2) After turning on the pulse power switch on the controller and pressing the cutting button, the pulse power has no output. This is usually caused by the collector of V. not being connected to the base of V2.
