An **incremental encoder** is a type of rotary or linear position sensor that generates a series of pulses as its shaft or linear element moves. These pulses provide information about the relative position and speed of the moving part but do not inherently provide absolute position data without referencing a known starting point.

At its core, an incremental encoder consists of:

- **A rotating disk or strip** with evenly spaced grooves or marks.
- **Optical or magnetic sensors** that detect these marks.
- **Electronics** that convert sensor signals into digital pulses.

Incremental encoders are vital components in modern motion control systems, offering a blend of affordability, accuracy, and reliability. While they excel in relative position detection and speed measurement, they often work alongside other systems to provide comprehensive position data. Understanding their operation and limitations enables engineers and technicians to select the right encoder for their specific application, ensuring optimal performance and efficiency.

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