This can be used as an accurate reference point. Once every rotation, this Z signal is rising for typically 90°, on the exact same position. By turning the encoder clockwise, the “A” pulse is rising 90° ahead of the “B” pulse, by turning the shaft counterclockwise, the “B” pulse is rising ahead of the “A” pulse.Īdditionally some incremental encoders output a “Z” signal. These 2 signals are set up with a 90° offset, which is required for the detection of the encoder’s rotation. One sensor must be connected to one controller.Īn incremental encoder has at least 1 output signal “A” or typically 2 output signals, called “A” and “B”. Incremental rotary encoders provide a serial output signal on a single transmission line.
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