Optical Rotary Encoder Mounting！

Standard rotary encoders incorporate their own shaft and bearing assembly. In very low-cost or miniature encoders, sometimes adhesive secures bearings to the shaft hub, though vibration can cause failure here. More commonly, the rotary encoder shaft couples to the motor shaft with a belt, gear train, or coupling. For the latter, perfect alignment of rotary encoder and driving shaft centers of rotation is impossible, so flexible couplings are often used. Roundss Manufacturers offer detailed guidelines on proper mounting.

In contrast, hollow-bore (also called hollow-shaft) rotary encoders slide over and clamp onto a precision shaft, attaching directly to the motor frame through a flexible mount. A proper fit between the bore and shaft plus a good flex mount help retain accuracy and extend encoder bearing life.

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