1. Failure of the encoder itself: it refers to the failure of the components of the encoder itself.

It can not produce and output the correct waveform.In this case, the encoder needs to be replaced or its internal components repaired.

2. Encoder connection cable fault: this kind of fault has the highest probability, which is often encountered in maintenance and should be given priority.Usually the encoder cable is broken, short circuit or poor contact, when the cable or connector needs to be replaced.Special attention should also be paid to whether the cable is not fixed tight, loose caused by open welding or open circuit, at this time need to tighten the cable.

3, encoder +5V power supply decline: refers to the +5V power supply is too low, usually can not be lower than 4.75v, the cause of too low is the power supply failure or power transmission cable resistance value is too large and cause loss, at this time need to repair the power supply or cable replacement.

4, absolute encoder battery voltage drop: this kind of fault usually has a clear meaning of the alarm,

At this point, the battery needs to be replaced. If the memory of the reference point location is lost, the operation of returning to the reference point must be performed.

5. The shield wire of the encoder cable is not connected or falls off: this will introduce interference signal and make the waveform unstable, which will affect the accuracy of communication. It is necessary to ensure the reliable welding and grounding of the shield wire.

6. Loose encoder installation: this kind of fault will affect the position control accuracy, resulting in the position deviation in the stop and movement, or even the servo system overload alarm as soon as the machine is started, please pay special attention.

7, grating pollution will make the signal output amplitude decline, must use absorbent cotton stained with alcohol to wipe gently oil