Failure analysis of encoder shaft locking and red powder appearance

Encoder shaft lock up and red powder failure analysis I. Encoder failure phenomenon Encoder shaft lock up, red powder powder. Second, the encoder manufacturer test results 1, and then inside and outside the encoder are found brownish-red powder. Absolute encoder is the displacement is converted into a periodic electrical signal, and then this electrical signal into counting pulses, with the number of pulses to indicate the size of the displacement. 2. The following samples and traces were collected from inside the bearing. a. The internal and external bearings of the encoder have obvious traces of wear and the bearing grease is dry and knotted. b. The other two bearings also show signs of wear. The bearings are worn inside and outside, and the other two have degradation of grease. Encoder installation is installed after the reduction gear, such as the shaft end of the winch wire rope reel or the last section of the reduction gear shaft end, this method has no gear back and forth clearance, the measurement is more direct, higher precision, this method a...