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Absolute encoder achieves ten atoms resolution at 100m/s

01 April 2010

Renishaw will focus on its latest range of optical incremental encoders, optical absolute encoders and magnetic encoders at mtec, part of the Advanced Manufacturing event (NEC, Birmingham, April 27 and 28 2010). Demonstrations will include a new 1nm resolution version of its established TONiC incremental encoder, a new magnetic chip encoder, and a groundbreaking absolute optical encoder for rotary and linear applications that is capable of ten atoms resolution at 100m/s – the new RESOLUTE.

This non-contact device features an advanced optical scheme that reads from a fine-pitch, single-track scale. Not only does this endow the encoder with greater set-up tolerances, but it also delivers excellent immunity to dirt, scratches and light oils. It is suitable for both linear encoder and angle encoder applications, and acquires absolute position immediately at system switch-on, so the exact orientation of axis and motor commutation angle are known without the need for a reference (datum) return.

RESOLUTE is available with BiSS C high-speed serial communications, an open protocol that is available on a range of industry-standard servo drives, controllers, counter cards and encoders. Absolute linear encoder versions of RESOLUTE with the BiSS protocol have resolution options of 1nm, 5nm and 50nm, whilst RESOLUTE absolute angle encoders with BiSS protocol have resolution options of 18 bits (4.94 arc seconds), 26 bits (0.02 arc seconds) and 32 bits (0.0003 arc seconds). In all cases, the maximum speed is 100m/s. The range is also available with other protocols.


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