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Renishaw’s Resolute absolute encoder is now available with Fanuc serial communications in linear encoder formats for high-precision machine tools, grinding machines and diamond-turning machines.

Offering sub-micron accuracy and resolutions to 1nm, Resolute is a true absolute encoder, meaning it determines absolute position immediately upon switch-on, eliminating the need for battery back-up or reference returns.

It uses a detection method that is analogous to an ultra-high-speed digital camera reading from a non-repeating, fine-pitch barcode scale.

Even at speeds of up to 100m/sec, images are captured, analysed and interpolated to resolutions as fine as 1nm.

This technique features immunity to contamination, owing to a cross-checking and dirt-rejection capability, and also attains wide setup and running tolerances.

Safety is assured through Resolute’s built-in separate checking algorithm, which constantly monitors position and ensures any problems are flagged up before they reach the controller.

The combination of a high-performance readhead and scale technology also provides users with higher-fidelity encoder feedback.

Dynamic response is significantly improved owing to sub-divisional error (SDE) being controlled to within +/-40nm, jitter (noise) of less than 10nm RMS and a non-contact format that eliminates the mechanical uncertainty of fragile wheeled carriages found inside traditional enclosed linear encoders for machine tools.

Overall accuracy to better than +/-1um is offered as standard on RELA Invar scales, while RSLA stainless steel scales offer very high accuracy at lengths of up to 5m.

Also available are RTLA and RTLA-S rugged steel tape scales, which allow +/-5um/m accuracy, lengths of up to 10m and quicker and easier installation.

The range of absolute encoders is also available in angle encoder format and with a variety of protocols to interface with a range of industry-standard servo drives and controllers.

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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