Potentiometers provide low cost, analogue position feedback with simple integration. However, they are subject to degradation of performance, or even failure, due to wear and contamination. A dirty or worn potentiometer can provide noisy, unreliable operation, requiring periodic replacement.
A new generation of non-contact solid-state devices provides a rising voltage output from a simple three-wire system to provide a viable alternative to traditional potentiometers but with virtually unlimited life, no wear and insensitivity to contamination. These devices provide all the ease of use of a conventional potentiometer but with none of the limitations.
Developed in association with its associate company RLS d.o.o., Renishaw’s range of magnetic encoder modules can provide a linear output voltage, proportional to the rotation angle, like a potentiometer, but without any physical contact. These devices can be IP68 sealed for outdoor or submerged operation, and are 100% solid state devices so they are insensitive to shock and vibration.
They have no wipers, seals, bearings or other moving parts to wear out or become contaminated, offering 100% non-contact operation for the ultimate reliability. A small package size, and low cost, make the Renishaw digital pot encoder an ideal choice when looking for a higher reliability alternative to traditional potentiometer feedback.