Encoders measure rotation speed, sense, position, angle and length. For this purpose, they convert mechanical motion in electrical signals.
There are incremental and absolute encoders. Signal periods provided by incremental encoders are used as a measure for rotation speed or position. The dual-channel incremental encoder detects positions bidirectionally as well as the rotation sense of shafts.
With absolute encoders instead, each incremental angle is assigned a code pattern. The position is detected at any time, even in the event of power failure without having to perform a reference run. Single-turn encoders set back the coding to the initial value after each full revolution. Absolute encoders detect angles, positions and inclinations precisely. Tasks that are typically found in robotics, positioning and process technology.
Encoders are available as solid and hollow shaft types. Hollow shaft encoders can be mounted without couplings, brackets or other mounting aids. The hollow shaft encoder is shifted on the drive shaft, then clamped and if necessary fi xated with a pin.
TURCK encoders are available in diverse mechanical designs, as versions for incremental or absolute position detection, as hollow or solid shafts and in various sizes with diameters from 24 mm to 102 mm. They fulfill different positioning tasks with a resolution of up to 14 bits (digital devices) and of up to 36,000 pulses per revolution (incremental types).
If simple length measurements have to be performed such as cutting paper or fabrics to length, encoders with a prefixed measuring wheel are the right choice. They are reasonably priced and operate highly accurate.
Encoders with a prefi xed draw-wire mechanism (1 to 40 m long) are the best solution for direct length measurements. Thanks to the excellent repeatability rating of 0.05 mm, they solve position control tasks highly precise in systems in which only complex equipment has been operated successfully until now. Whether applied to control the filling levels, position of pumps in tanks, alignment of elevating platforms or orientation of cranes: Just select an encoder of the right size and with the appropriate output confi guration and combine it with a draw-wire mechanism of the right length.