Renishaw to Present Position Feedback Encoders

Renishaw will exhibit the latest additions to its range of position feedback encoders at the Sensors and Systems exhibition, which is due to be held in Farnborough in the UK on 14-15 September 2011. Visitors to Stand B17 will see a new component level magnetic encoder, an absolute optical encoder with a range of serial communications options and new additions to the company's Tonic range of incremental encoders. Renishaw claims that its Tonic incremental optical encoders provide the accuracy of fragile fine-pitch encoders but in a rugged, simple-to-install package.

New enhancements to the range of linear and rotary encoders include 1nm and 2nm resolutions, a dual-output encoder interface, UHV-compatible formats and compatibility with Renishaw's dual-signal interface (DSi) for accurate angle encoding. Suitable for embedded motion control applications, Rolin is a component level non-contact magnetic encoder designed for use as a position control loop feedback element. The system consists of a read head and a magnetic scale or ring, with electronics inside the read head allowing high interpolation rates of up to 13 bits and fault monitoring.

A wide range of resolutions is available, from 0.244um to 125um, with speeds of up to 40m/sec dependent on the chosen resolution. Radial or axial reading of the ring is possible, and applications are expected to be for high-volume, miniature axes in a wide range of industry sectors. Visitors to Sensors and Systems will also be able to see the Resolute true absolute optical encoder, which is capable of 27-bit resolution at 36,000rev/min. The fine-pitch system offers excellent dirt immunity, while delivering a resolution of just 1nm at up to 100m/sec, for both linear and angle encoding applications. It is available with a range of high-speed serial protocols including the BiSS-C (unidirectional) open protocol and Fanuc serial communications in linear encoder format.

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