A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals.
An encoder disk is a key part of an encoder or sensing device used to enable control systems to identify motion, position, speed, direction, or count. Encoder disks essentially convert motion into electrical signals. They may be integrated with printed circuit boards, optical components, or magnetic devices; therefore, each disk must be precisely engineered, which is achieved with photo chemical etching.
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