Common Faults and Methods of Servo Motor Maintenance in Jiangyou City

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Common Faults and Methods of Servo Motor Maintenance in Jiangyou City

author:xiaoE date:2020-01-05 12: 46

　　1.Mechanical oscillation(During acceleration/deceleration)

　　 The common causes of such problems are:

　　 ① The pulse encoder is faulty.At this time, check whether the voltage on the feedback line terminal of the speed detection unit has dropped at a certain point. If there is a drop, it indicates that the pulse encoder is defective, and replace the encoder;

　　 ②The pulse encoder cross coupling may be damaged, causing the shaft speed to be out of sync with the detected speed, replace the coupling;

　　 ③The tachogenerator is faulty.Repair and replace the tachometer.In the maintenance practice, the tachometer motor brush is worn out and has many problems with jamming. At this moment, remove the tachometer brush, polish it with sandpaper a few times, and clean the commutator dust together, and then reinstall the servo motor.

　　 2. The mechanical movement is abnormally fast (speeding)

　　 For such problems, you should check the azimuth control unit and the speed control unit together. You should also check: ①Whether the pulse encoder wiring is faulty; ②Whether the pulse encoder coupling is damaged; ③Check whether the tachogenerator terminal servo motor is connected reversely Whether it is connected with the excitation signal wire wrongly.

　　 3. The spindle can't move directionally or the directional movement is not in place

　　 For such problems, you should check the setting adjustment of the directional control circuit, check the directional board and the spindle control printed circuit board, and check whether the output waveform of the azimuth detector (encoder) is normal to judge whether the encoder is good or bad ( It should be noted that the normal output waveform of the encoder should be measured when the equipment is normal, so that it can be checked in case of failure).

　　 4. Vibration when the coordinate axis feeds

　　The connection between the motor coil, mechanical feed screw and the motor, servo system, pulse encoder, coupling, and tachometer should be checked.

　　