Is there a difference between encoder accuracy and encoder resolution?！

Resolution refers to the number of bits or words contained in the complete code. For incremental encoders, resolution is defined as cycles per revolution.
For absolute single turn encoders, it is called counts per turn.
Accuracy is the difference between the actual position and the theoretical "perfect" position of each bit edge. The base accuracy of an encoder is traceable to the encoding disc and the mounting technique of that disc on its spindle. Accuracy is different from and is not directly related to resolution. It is possible to have a high-resolution encoder that is very inaccurate. Shaft and bearings are also responsible for the accurate rotation of the disc. Poor quality discs, shafts, bearings or the method of building the encoder can all contribute to an inaccurate encoder, regardless of its resolution.

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