Microcomputer controlled spark CNC wire cutting machine is an integrated electromechanical instrument. The electrical system is mainly divided into control system and machine tool electrical. The former consists of power supply, interface, single-board microcomputer and some peripheral equipment, and then consists of the wire-cutting system motors and corresponding control appliances. A brief introduction to common faults in use is given here: the stepper drive section. Phenomenon: The stepper motor does not travel, it only shakes, and some of the three-phase indicator lights are not bright or flashing. Reason: lack of phase drive. Inspection method: First, check whether the fuse of the phase drive power supply is blown, and the overcurrent protection sampling resistor is open circuit.
If all the above parts are normal, further check the potentials at both ends of the indication (which is the light-emitting diode, and the positive pole is connected to the output signal of the single-board microcomputer step interface) by: starting the single board machine working procedure, if the indicator light is not positive The output signal is the interface line fault. Further, it is possible to detect a faulty person among the components such as the drive tube 3DK4 and the diaphragm GO102B. If the three-phase indicator of the whole x or the three-phase indicator of the whole y is not lit or blinking, it may be that the 4 NAND gate T095 in the interface circuit fails in the single board machine step. If all the indicators of x and y are not lit, and the stepping motor does not work, it may be the work of the stepping drive power supply; if the source of the B is faulty, generally check the filter capacitor 5CI or other rectifying components to eliminate the fault.
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