Servo motor maintenance and precautions

Servo motors have a wide range of applications in different industries, especially in industry. However, when using servo motors, some faults cannot be avoided. So what kind of maintenance methods should be adopted to deal with these faults? What I want to introduce below is the maintenance and precautions of servo motors. I hope it can help everyone!

Servo motor maintenance is divided into mechanical part maintenance and electrical part maintenance.

1. The repair of the servo mechanical part is the replacement of damaged bearings. Compared with the maintenance of ordinary motors, it is just that the bearings are special. Since servos are synchronous motors with magnetic poles on the rotor, the problem cannot be solved with ordinary materials, so the customization of materials becomes crucial. At the same time, the alignment requirements are higher than those of ordinary motors, but the replacement process is not easy. It is complex and not much different from general motor maintenance.

2. Maintenance of servo electrical parts mainly includes winding, magnetization and encoder maintenance.

① Winding the wire is relatively simple. You only need to wind it back according to the original motor circuit and wire diameter. The premise is to use copper wire made of high-quality materials.

② The technical content required for magnetization is generally divided into external magnetization and disassembly magnetization. The former is suitable for magnetizing some stator magnetic fields; while disassembly magnetization requires skills. In addition to knowing the magnetic strength of the original motor, it is also necessary to know the magnetic strength of the original motor. It is necessary to understand the distribution situation and ensure its shape. It is equally important to select raw materials. Materials that are resistant to high temperatures and high electromagnetic interference should be given priority.

③ The replacement and maintenance of encoders is where the technical content of servo maintenance is tested. After all, of the imported servo has a non-standard communication pattern. The early incremental products can be interchanged with each other, but the new generation products have formed their own different internal specifications. Different manufacturers have different specification modes. In addition, the pulse density is too large, and the encoder alignment has different algorithms, so that each Branded products lack commonality, making maintenance more difficult.

Precautions for servo motor maintenance and shutdown are as follows:

1. During servo motor maintenance and inspection, use a vacuum cleaner with a plastic nozzle to thoroughly clean the surface of the servo cabinet to ensure that there is no excessive dust around the equipment.

2. Check the tightness of all electrical connections, check each circuit for abnormal discharge traces, strange smell, discoloration, cracks, damage, etc.

3. Check whether the connection between the internal cables of the servo is correct and reliable.

4. Check whether all groundings in the servo cabinet are secure and whether the grounding points are rusty.

5. The connecting nuts of the servo internal cables should be tightened again every six months (within).

6. After each maintenance of the servo motor, carefully check whether there are any missing screws and wires, etc. to avoid servo short-circuit accidents caused by small metal objects. Especially after making major changes to the electrical circuit, ensure that the electrical connection wires are connected correctly and reliably to avoid "reverse power transmission" accidents.

7. When the servo motor resumes operation after being shut down for a long time, the insulation of the servo (including the phase-shifting transformer and the main circuit of the bypass cabinet) should be measured, and a 2500V megger should be used. The servo motor can be started only after the insulation test is qualified.