Incremental encoders transform the angular movement to a pulse train that we use to measure the position or rotational speed.
Likewise many sensors, this type of encoders don’t inform about the position in every moment but about the angular movement performed. This occurs because the generation of a pulse produced every time that we move the optical or magnetic disk inside.
The number of pulses each round indicates the resolution, for example an encoder of 360 pulses per round generates a pulse per degree. Its resolution is 1º.
To perform the detection of direction of rotation, and therefore to know the movement we do in every direction, we have two exits (two pulse trains) staggered 90 degrees. We will know the direction after detecting the channel that generates the first pulse.
With the principle of pulse generation, we can distinguish optical encoders (a transparent disc with screen-print of each emission zone through which passes an optical sensor) or magnetic encoders that detect the rotation of a magnet by a Hall effect sensor that generates a sinusoidal signal.
Sensotec Instruments has incremental encoders TWK with high performance capable for the most demanding applications:
-Up to 273408 positions per round.
-Protection IP 69, submersible.
-With external axis or without bearings by a magnet contact.
-Robust construction in aluminium or stainless steel.