1. Motor encoder alarm
1. The cause of the failure
(1) Wrong wiring;
(2) electromagnetic disturbance;
(3) Encoder hardware damage caused by mechanical vibration;
(4) Pollution caused by the on-site environment.
2. Troubleshooting
(1) Check the wiring and troubleshoot errors;
(2) Check whether the shielding is in place, check whether the wiring is reasonable and handled, and add filters to improve if necessary;
(3) Check the mechanical structure and improve it;
(4) Check whether the encoder is polluted or corroded (dust, oil, etc.) to strengthen protection.
3. Device and wiring standards
(1) Use the original cable as much as possible;
(2) Separate the cable to keep it away from the polluted wiring as much as possible, especially the highly polluted wiring;
(3) Always use the internal power supply as much as possible. If the switching power supply is used, a filter should be used to ensure that the power supply reaches the clean level;
(4) Ground the common end all the time;
(5) Insulate the encoder shell from the machine structure and connect it to the cable shielding layer;
(6) If it is not possible to insulate the encoder, the cable shield can be connected to the ground (or special terminals) on the encoder housing and driver frame.
Second, the motor shaft is broken
1. The cause of the failure
(1) Unreasonable mechanical design leads to excessive radial load force;
(2) The load end is stuck or serious instantaneous overload;
(3) The motor and reducer are not centered when assembling.
2. Troubleshooting
(1) Check the maximum radial load force that can be borne in the motor sample and improve the mechanical design;
(2) Check the operation status of the load end, recognize the actual process requirements and improve them;
(3) Check whether the load operation is stable, whether there is vibration, and improve the accuracy of mechanical assembly.
3. The no-load current of the motor is unbalanced, and the three-phase difference is large
1. The cause of the failure
(1) The end of the winding is wrongly connected;
(2) The power supply voltage is unbalanced;
(3) There are problems such as inter-turn short circuit and reverse coil connection in the winding.
2. Troubleshooting
(1) Review and correct;
(2) Measure the power supply voltage and try to eliminate the imbalance;
(3) Eliminate winding problems.
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