Renishaw is introducing new 1nm and 2nm resolution versions of its successful TONiC incremental encoder range. Available in linear and rotary formats, the new higher resolution options comprise a standard TONiC readhead and new Ti20KD (1nm) or Ti10KD (2nm) interfaces that apply high interpolation rates to achieve very fine resolutions. Furthermore, TONiC's low-noise optical scheme with superior photometry has been combined with advanced filtering inside the Ti20KD and Ti10KD interfaces to reduce the jitter (noise on reported position) to an impressively low level of just 0.51nm 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 in additio to the benefits of the dynamic signal conditioning included as standard on all TONiC readheads.
As a result, 1nm and 2nm TONiC incremental encoders offer all the benefits of a 20-micron pitch encoder, such as easy set-up, greater ruggedness and superior immunity to dirt, yet they also rival the resolution and noise levels of much finer-pitched encoders.
The linear encoder version of the TONiC is available with a comprehensive range of scale options. RGSZ is the latest evolution of Renishaw's gold tape scale, now with integral IN-TRAC optical reference marks. RELM Invar spars offer 'zero' thermal expansion and +/-1um accuracy on lengths up to 1130mm, while for high performance on long axes and significantly more robustness than glass scales, RSLM stainless steel spars have a total accuracy of +/-4um over 5m, with lengths up to 10m available. Additionally, for very fast and easy installation, the new FASTRACK linear encoder scale system comes with a low-profile RTLC tape scale, offering +/-5um/m accuracy.
Rotary (angle) encoders options are also well served, with RESM rings in a range of standard diameters from 52mm to 550mm, with even larger sizes available on request. For higher performance, ultra-high-accuracy REXM ring encoders have a total installed accuracy better than +/-1 arc-second on ring diameters greater than 100mm when used with dual readheads.
The interfaces have been named after their interpolation factors: Ti20KD refers to 20k digital interpolation (post-quadrature), which equates to 1nm resolution.
As with all Renishaw encoders, TONiC incremental encoders are backed by a responsive global sales and support network. Furthermore the product satisfies the highest environmental standards, being compliant with both WEEE and RoHS regulations.