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

Available in linear- and rotary-encoder 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 fine resolution.

Tonic’s low-noise optical scheme with superior photometry has been combined with advanced filtering inside the Ti20KD / Ti10KD interfaces to reduce the jitter (noise on reported position) to just 0.51nm RMS.

The reduced jitter and increased resolution result in an encoder that enhances 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, 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 dirt immunity, yet they also rival the resolution and noise levels of much finer pitch encoders.

The linear-encoder version of Tonic is available with a comprehensive range of scale options.

RGSZ is the latest evolution of Renishaw’s ubiquitous 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.

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.

For fast and easy installation, the Fastrack linear-encoder scale system comes with low-profile RTLC tape scale, offering +/-5um/m accuracy.

Rotary (angle) encoder options are also well served, with RESM rings in a range of standard diameters from 52 to 550mm, with even larger sizes available.

For even higher performance, ultra-high accuracy REXM ring encoders have a total installed accuracy of 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.

Tonic incremental encoders are backed by a responsive global sales and support network.

The product satisfies the highest environmental standards, with both WEEE and RoHS compliance.

Renishaw

A world leader in engineering technologies, Renishaw’s core skills in measurement and precision machining serve sectors as diverse as dimensional metrology, spectroscopy, machine calibration, motion control, dentistry and surgical robotics.

A world leader in engineering technologies, Renishaw’s core skills in measurement and precision machining serve sectors as diverse as dimensional metrology, spectroscopy, machine calibration, motion control, dentistry and surgical robotics.

Sensors for co-ordinate measuring machines (CMMs) are an industry standard, from basic touch-trigger probes through to automated stylus and probe changers, motorised indexing probe heads, and revolutionary five-axis measurement systems.

Machine probes for CNC machine tools allow automated tool setting, workpiece set-up, in-cycle gauging and part inspection. Products include laser tool setters, contact tool setters, tool breakage detectors, touch probes and high accuracy inspection probes.

For motion control, Renishaw supplies laser encoders, optical linear encoders, optical angle encoders, optical rotary encoders, magnetic rotary encoders, magnetic chip encoders and magnetic linear encoders.

To analyse the static and dynamic performance of position-critical motion systems, Renishaw’s laser interferometer and environmental compensation system offers a linear measurement accuracy of 0.5 ppm, readings of up to 50 kHz and a linear measurement speed of up to 4 m/s, with a linear resolution of 1nm.

Renishaw’s Raman spectroscopy products exploit the Raman effect to identify and characterise the chemistry and structure of materials. A diverse range of analytical applications include pharmaceutical, forensic science, nanotechnology, biomedical and semiconductors.

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