Encoder fault solution2021

Encoder is a commonly used electronic component, long-term use may cause some malfunctions, and some encoder malfunctions can be solved with our own hands. Do you want to learn it~

1. The rotary shaft of the encoder will be deformed. This situation is generally due to the over-tightening of the locking nut of the fixing nut or locking potentiometer during installation. The suggestion given here is that after the nut is locked, the shaft should be about 1mm higher than the surface of the nut.

2. The encoder rotation is not flexible. It is usually caused by dust or lubricating oil entering the shaft. In this case, a small amount of gasoline can be dripped on the shaft. It is recommended to rotate the shaft while dripping gasoline.

3. Poor contact of encoder. There are two cases of poor contact. The first is when the reed has insufficient elasticity, and the second is the poor contact between the lead-out leg and the carbon film. Both cases can be repaired. In the first case, the reed contact and the root of the yellow sheet are properly pressed down, and in the second case, the lead-out feet are clamped with pliers.

4. Encoder failure usually has a clear alarm. When this happens, the battery needs to be replaced. If the memory of the reference point position is lost, the operation of returning to the reference point must be performed.

5. Encoder failure: it refers to the failure of the encoder's own components, causing it to fail to generate and output the correct waveform. In this case, you need to replace the encoder or repair its internal components.

6. Encoder connection cable failure: This type of failure has the highest probability of occurrence, and it is often encountered during maintenance and should be a priority factor. Usually the encoder cable is open, short-circuited or poorly contacted. At this time, the cable or connector needs to be replaced. Special attention should also be paid to whether the cable is not tightly fixed, causing loosening and causing open welding or disconnection. At this time, the cable needs to be clamped.

7. Encoder +5V power supply drop: It means that the +5V power supply is too low, usually not lower than 4.75V. The reason for the too low is that the power supply fails or the power transmission cable resistance is too large to cause loss. At this time, the power supply needs to be repaired. Or replace the cable.

8. Absolute encoder battery voltage drop: This kind of fault usually has a clear alarm. At this time, the battery needs to be replaced. If the memory of the reference point position is lost, the operation of returning to the reference point must be performed.

9. The shielding wire of the encoder cable is not connected or falling off: This will introduce interference signals, make the waveform unstable, and affect the accuracy of communication. It is necessary to ensure the reliable welding and grounding of the shielding wire.

10. Loose encoder installation: This kind of failure will affect the accuracy of position control, resulting in excessive position deviation during stop and movement, and even the servo system overload alarm will be generated as soon as the machine is turned on. Please pay special attention.

Eleven, grating pollution: This will reduce the signal output amplitude, you must use absorbent cotton dipped in absolute alcohol to gently wipe off the oil.