Incremental encoders

Renishaw has introduced 1 nm and 2 nm resolution versions of its TONiC incremental encoder range.

Available in linear encoder and rotary encoder formats, the higher resolution options comprise a standard TONiC readhead and new Ti20KD (1 nm) or Ti10KD (2 nm) interfaces that apply high interpolation rates to achieve very fine resolution. Furthermore, TONiC's low-noise optical scheme, with superior photometry, has been combined with advanced filtering inside the Ti20KD / Ti10KD interfaces to reduce jitter (noise on reported position) to 0.51 nm RMS. The reduced jitter and increased resolution result in an encoder that provides significantly enhanced positional stability and low-speed velocity control. This improvement is additional to the benefits of the dynamic signal conditioning included as standard on all TONiC readheads. As a result, 1 nm and 2 nm TONiC incremental encoders offer all the benefits of a 20 micron pitch encoder, such as easy set-up, greater ruggedness and superior dirt immunity, yet they also rival the resolution and noise levels of much finer pitch encoders.