The encoder output signal

1, the signal sequence

General encoder output signal in addition to A, B two phase (A, B two channel signal sequence phase difference of 90 degrees), each turn A zero output pulse Z..

When the main shaft to rotate clockwise, output pulse, referring to the following figure before A channel signal in the B channel; When the main shaft rotate counterclockwise, A channel signal is located at the B channel. And so the spindle is forward or reverse.

Sinusoidal output encoder output differential signal as shown in the figure below:

2, zero signal

Each rotary encoder sends a pulse, a week is called zero pulse or pulse, zero pulse is used to determine the zero position or location. To accurately measure the zero pulse, regardless of direction of rotation, zero pulse were as two channel combinations of high output. As a result of the existence of phase difference between channels, zero pulse is only half the length of the pulse.

3, early warning signal

Some encoder and alarm signal output, and is able to power failure, leds fault alarm, so that users replace the encoder in time.