Rotary Encoders

Rotary encoder is a kind of sensor, which generates electrical signals according to rotation movement. This signal is used to determine or control the speed or position of a mechanical device. Rotary encoders are installed on cylindrical shafts and are usually combined with mechanical conversion devices (such as linear sliders, racks and pinions) to measure linear motion. Rotary encoders are used in various precision equipment, including medical equipment, robots, assembly machines, and test equipment, which require close control of position or speed. There are two main types of rotary encoders that generate electrical signals based on rotary motion: incremental encoders generate a series of pulses or counts as they rotate. Its output is measured in units of pulses per revolution. These pulses are used to measure speed or track position. The absolute encoder produces a digital output signal, each bit corresponds to a known position, so the absolute encoder can be directly used to indicate the actual position.