1、 Encoder itself failure: Component damage is one of the common failure problems in encoder use. Once encountering a component failure problem, the first thing to do is to determine whether the equipment still has useful value. If it does not have useful value, it is best to replace it decisively. Although various imported encoder components may have different materials and installation methods, However, necessary inspection and maintenance work is still indispensable. 2、 Encoder connection cable failure has the highest probability of occurrence and is often encountered during maintenance, making it a priority factor to consider. Once there is a connection problem, the first step is to start checking from the external environment. It should be noted that the encoder is a precision instrument, and the internal connection is basically not a problem. In most cases, it is due to a short circuit, short circuit, or poor contact of the encoder cable. In this case, the cable or connector needs to be replaced. Special attention should also be paid to whether it is due to loose cable fixation that causes open welding or circuit, in which case the cable needs to be clamped tightly. 3、 The decrease in encoder+5V power supply refers to the fact that the+5V power supply is too low, usually not lower than 4.75V. The reason for the low voltage is due to a power supply failure or a high resistance of the power transmission cable, which leads to losses. At this time, it is necessary to repair the power supply or replace the cable