Amt102 incremental encoder how it works

Incremental encoder




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Perpetual calendar


Kübler incremental encoder


Incremental encoders are also used as rotary encoders, pulse encoders, encoders, angle encoders and the like. named. Basically, it is a sensor that generates a series of pulses during a movement. When evaluating these impulses, various variables such as speed, feed length, angle setting or acceleration can be determined. An incremental encoder can be used both as a measuring (length measurement) or monitoring instrument (speed monitoring) and as a control device (manual settings, positioning).

Incremental encoder Baumer


Depending on the type, an incremental encoder can generate one or more signals. For example, a movement can be detected with just one signal, but not the direction. The direction of rotation can also be determined with two signals, A and B. Signals A and B can also be monitored with inverted signals / A and / B. Many encoders also provide a third signal as a reference signal. In the case of special and precision encoders, there are additional signals. The number of pulses per revolution is the most important variable of a pulse generator: the resolution.

Coded rotary switch (rotary encoder) with a push button switch


In the case of incremental encoders with two tracks, A and B, the respective pulses are generated offset from one another by 90 °. This results in the possibility of not only counting the pulses but also determining the direction of rotation. Track A can be viewed as a clock signal and track B as a directional signal. If the shaft of the rotary encoder moves clockwise (clockwise rotation), signal A is generated before signal B. If the rotary encoder moves counter-clockwise (left-hand rotation), signal B is generated before signal A. The pulses must then be evaluated by an evaluation device (e.g. a microcontroller).

A / B signal shift

Incremental encoder Omron (absolute encoder)


Incremental encoder


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