Some factors encoder failure！

1, The rotary encoder bad (no output), the inverter does not work, it becomes very slow speed, and while the drive protection, display "PG off" ... joint action in order to work . For electric signal rises to a higher level, without any interference, and produce a square wave pulse, which must be processed by the electronic circuit. Pg encoder connection wiring and parameter vector inverter and rotary encoder pg between the encoder must correspond to the model pg. Generally, the encoder pg model points differential output, open collector output and push-pull output three, the transfer mode signal must take into account the frequency converter pg card interface, so choosing the right card model or set reasonable pg. the encoder itself fault: refers to the encoder itself components fails, it can not lead to the generation and output the correct waveform. In this case the need to replace or repair the internal encoder device.

2, The rotary encoder connection cable fault: This is the highest probability of failure, maintenance often encountered, should be a prime consideration. Usually encoder cable open circuit, short circuit or poor contact, then the need to replace the cable or connector. Special attention should be whether it is due to the cable is not tight, resulting in open welding caused by loose or break, then the need to clamp the cable.

3, The rotary encoder + 5V power drops: is + 5V power supply too low, usually not less than 4.75V, resulting in low power because of a power failure or power transmission cable resistance is too large and cause losses, then the need to overhaul the power or replace the cable.

4, The rotary absolute encoder battery voltage drops: This failure is usually unambiguous warning, then the need to replace the battery, if the reference point position memory loss, must perform reference point return operation.

5, The rotary encoder cable shield is not connected or off: it will introduce interference signals, the waveform instability, affect the accuracy of communication must ensure reliable welding shield and ground.

6, The rotary encoder is mounted loose: this failure will affect the position control accuracy, resulting in movement and stop position offset tolerance, even just a boot that is generating the servo system overload warning, please pay special attention.

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