What is the difference between incremental and absolute Autonics rotary encoders?
The difference between incremental and absolute Autonics rotary encoders lies mainly in how they measure and report position data. An incremental rotary encoder generates a series of electrical pulses as the shaft rotates. Each pulse represents a small movement, and the total number of pulses indicates how far the shaft has turned. The direction of rotation is determined by the phase difference between two output signals, usually called A and B channels. However, when power is turned off, the encoder loses its position information. When powered back on, it must re-establish its reference or “home” position before continuing operation. Incremental encoders are commonly used for speed detection, direction control, and relative position measurement in conveyors, packaging lines, and motor feedback systems.
In contrast, an Absolute Autonics rotary encoder assigns a unique digital code to every shaft position. This means it can identify its exact position instantly after power is restored — without needing to reset or rehome. The data output from an absolute encoder provides absolute position information, making it ideal for applications requiring high precision and accuracy, such as robotics, CNC machinery, and automated production equipment. Autonics offers both single-turn absolute encoders, which measure one full revolution, and multi-turn absolute encoders, which can track multiple rotations.
In short, the incremental encoder is best for continuous motion and speed tracking, while the absolute encoder is better for precise position feedback and repeatability. Both types are essential in automation, and choosing the right one depends on whether you need relative or absolute position control. Autonics provides both encoder types with reliable performance, high resolution, and compatibility for a wide range of industrial applications.