Rotary encoder
A rotary encoder is a device that can keep track of how much something has turned. This is called its angular position. That information is useful to know how far a motor has turned, for example.
Rotary encoders are often used in manufacturing and robotics. This is because they need things to be measured and controlled very accurately.
Basic types
[change | change source]Absolute
[change | change source]An absolute encoder always keeps track of what value its on, even if it isn't powered.
Incremental
[change | change source]An incremental encoder only keeps track of changes. It gives off signals if it is turned one way or another.
