Encoder failure and some suggestions for handling

Common encoder faults and maintenance:

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

(2) Encoder +5V power supply drop: refers to the +5V power supply is too low, usually not lower than 4.75V, the reason for the too low is the power supply failure or the power transmission cable resistance is too large and the loss is caused, then it needs to be repaired Power supply or replace cable.

(3) 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.

(4) Absolute encoder battery voltage drop: This type 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 reference point return operation must be performed.

(5) Encoder connecting cable failure: This type of failure has the highest probability of occurrence. It is often encountered during maintenance and should be the 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.

(6) 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.

(7) Grating pollution This will reduce the signal output amplitude, so the grease must be gently wiped off with absorbent cotton dipped in absolute alcohol.