What is a Quadrature Output?

Posted by London Rhodes on Apr 19, 2021 11:41:49 AM

Quadrature output refers to the fact that the signals A and B are separated by 90 degrees of phase shift with A leading B or B leading A depending on the direction of rotation. It does not mean that the output will be 4 times the amount of the Pulses Per Revolution of the encoder. The fact that the signals are 90 degrees out of phase enables the controller to determine the direction that the encoder is spinning. You must use both the A and B signal to have a quadrature output and to get X2 or X4 logic. (see What is the difference between Quadrature and x4 Logic?)

Topics: How to Choose An Encoder, Encoder Signals Output