The stepper motor of servo control wire cutting machine is mostly three-phase six-beat or five-phase ten-beat system, that is, according to the specific phase sequence, the servo feed is achieved in turn. Missing phase or phase sequence error will cause the stepper motor to lose step or stand in place. The biggest difference between the two is that the lack of phase makes the whole motor without working phase and loses the phase locking force when the phase is drawn, that is, the hand can rotate the motor. And a phase sequence error leads to two forward and one back or three forward and two back, standing still. The machine tool that has been working normally will not make a phase sequence error in the middle, and the usual fault is the lack of phase. Related to the absence phase are:
1, the feed signal sent by the single board machine is correct.
2. 24V power supply provided by the driver.
3, the motor drives the power output of the tube.
4, power consumption resistance of current limiting and bypass peak-eliminating two plate tube protection.
5. The cable and plug transmit the drive power to the motor.
6, motor winding and lead.
Lack of phase will not leave these six reasons. Therefore, it is necessary to observe before starting, and the working state of the power drive triode will be clearly displayed on the light-emitting diode. When the drive transistor is in good condition and the normal display is still in a phase deficiency state, the connector at both ends of the online cable is found in turn, the carrying capacity of the 24V power supply and the power consumption resistance are on and off, and the whole process should not be blindly disassembly and welding. When there are two situations, it needs to be repaired with the sales manufacturer.
1, it is true that the feed signal sent by the board is out of phase,
2, the stepper motor internal break, if the drive transistor failure should also have two situations, one is the light emitting diode is not bright, should suspect that the drive tube has opened, the second is the light emitting diode is not out, should suspect that the drive transistor has short circuit, pay attention to replace the drive tube, so that there should be a large area of stable contact between the shell and the heat fin, the adhesive surface is coated with thermal grease, Prevent the temperature of the tube core can not be effectively dispersed and re-burned.
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