The determination of angular position and signal generation is realised by an intelligent CMOS Hall sensor. A diametrical polarised magnet induces its magnetic fi eld into the sensor. It rotates and provides a conditioned signal to the integrated electronic.
There are 3 signals for incremental output : A,B and Z. Signals A and B are quadrature signals, shifted by 90° and signal Z is a reference mark. One revolution generates N pulses of signal A or B. The reference mark signal is produced once per revolution. The width of the Z pulse is 1/4 of quadrature signal period and is matched with A high and B high. Generally, the magnetic incremental encoders are directly comparable with
the conventional optical incremental encoders.They provide additional features and can much easier be adjusted to customer requirements. Neverthless optical and magnetic incremental encoders do not provide an absolute signal.