The global site of the UK's leading magazine for automation, motion engineering and power transmission
20 April, 2018

Product and Supplier Search

Facebook

Magnetic encoders could replace potentiometers

01 March, 2004

Magnetic encoders could replace potentiometers

Renishaw has developed a low-cost, high-speed rotary encoder with a novel, non-contact design that eliminates the need for seals or bearings, while reaching speeds of more than 30,000 rpm. The wear-free, frictionless design uses Hall effect sensors in a custom chip to sense the rotation of a magnetic actuator attached to the shaft.

The resulting encoder costs upwards of £50 - not much more than a precision potentiometer. It provides resolutions from nine-bit (512 count) to 12-bit (4,096 count), with measurement accuracies of 0.4 degrees.

As well as absolute versions, with parallel or serial data outputs, the encoders are available with incremental (1,024 pulse/rev), analogue, and linear current or voltage outputs. The linear options can be used in applications such as panel controls where, traditionally, potentiometers have been used.

The encoders are said to be shock- and vibration-proof. They have no internal moving parts, no seals to leak, and no glass optics to break. They are available with sealing to IP68.




Magazine
  • To view a digital copy of the latest issue of Drives & Controls, click here.

    To visit the digital library of past issues, click here

    To subscribe to the magazine, click here

    To see the latest Products & Services Directory, click here

     

Exhibition

Birmingham 2018The next Drives & Controls Exhibition and Conference will take place in Birmingham, UK, from 10-12 April, 2018. For more information on the event, visit the Show Web site

Poll

"Do you think that robots create or destroy jobs?"

Newsletter
Newsletter

Events

Most Read Articles