What is the working principles of encoder?
Encoders come in all levels of complexity.
The most simple just sends a pulse whenever a shaft passes a
fixed point as it turns.
More complex encoders send a pulse whenever the shaft passes one
of several points.
Even more complexity allows the encoder to send a pulse across
three circuits, allowing the encoder to indicate position AND
direction of rotation.
And up the complexity scale, there are encoders that read the
shaft position, translate it into degrees, radians or some other
unit of measure, then output a parallel data stream.
All are considered encoders.