The right turn at Turck

Turck expands its sensor portfolio with encoders in different styles and types

Turck launches a new comprehensive range of encoders, to offer its customers the ideal complete sensor solution.  Turck now offers magnetic and optical encoders in all categories, from incremental over absolute single turn, absolute multiturn right up to analogue. Turck offers the new encoders in many different sizes. In addition to the standard model with 58mm, there are miniature models of 24mm up to 37mm, as well as models for large hollow shafts with up to 100mm. Thanks to the robust mechanical construction and the compact die cast housing, the Turck encoders are insensitive to change in temperature, jolts and vibrations. The IP rated devices - special models for offshore use are IP69K rated and cover a temperature range of -40 to +105 degrees C

Encoders are used to measure distances, angles, positions or revolutions of machines, numerous sensor solutions are offered to the user - encoders are divided into two groups.

Incremental and absolute, with the most cost effective solution being incremental this provides signal periods whose numbers measure the revolutions, the length or the position. Incremental encoders are usually used for monitoring revolution and speed.

Whereas absolute encoders are used to monitor positions or angles.  A pattern is assigned to each position. The user can choose between a single turn encoder, also called an angle sensor, that measures the position over one rotation, or  a multi-turn encoder that can process several rotations. The clear assignment of a code for each position means  absolute encoders have exact information about the position, compared to incremental encoders that calculate the position.  Disturbances in the communication that lead to miscounts are possible especially with long cable lengths. To prevent this, the encoders must be calibrated to a datum or zero position this can be difficult  and also after a power failure the plant has to be set again with a reference run. Absolute encoders are different as they show the current position immediately so the information is available directly after a new activation of the plant.

Turck Scanning technologies

There are two established scanning technologies for industrial encoders: optical and magnetic scanning.  Optical provides high resolution with great accuracy, as well as a high resistance against electromagnetic interferences. Magnetic technology is especially shock resistant and may have  a higher protection rating of IP69K.  Often magnetic encoders are less expensive, have less resolution and are less precise. Turck offers both technologies available from Electroquip