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 encoders transform the movement in an analogic or digital that indicates the real actual position. With the measuring principle, we can distinguish the optical encoders (a transparent disc with screen-print that generates a binary information) or magnetic encoders that detect the rotation of the magnet by a Hall effect sensor. Sensotec Instruments has incremental encoders TWK with high performance capable for the most demanding applications: -Up to 65536 positions per round and 4096 rounds. -Protection IP 69, submersible. - With external axis or without bearings by a magnet contact. -Robust construction in aluminium or stainless steel. -Analogic output (0 [...]
Currently replaced by magnetic encoders, represent a robust measurement system like magnetic encoders but its performance is inferior. The basic principle of measurement is the movement of a magnet through the bobbin, changing the current circulating through it. We have available the traditional TWK models.
They indicate the angular position of an axis from the position of a cursor on a variable resistor. The old carbon has been replaced by conductive plastic less sensible to working conditions and more robust. Mechanically, they are they are the weakest but also the most economical system.