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Renishaw will focus on its latest range of optical incremental encoders, optical absolute encoders and magnetic encoders when it exhibits at MTEC, the sensors, measurement and instrumentation show.

Demonstrations will include a 1nm resolution version of the company’s Tonic incremental encoder, a magnetic chip encoder, plus an absolute optical encoder for rotary and linear applications that is capable of 10 atoms resolution at 220mph.

Renishaw’s Resolute absolute optical encoder system offers a resolution of 1nm at 100m/s for both linear encoder and angle encoder applications, while providing dirt immunity.

Absolute position is acquired 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.

Large set-up tolerances enable easy installation and high reliability, while low jitter and SDE (Sub-Divisional Error) meet the demands of high precision stages.

The Tonic range of incremental optical linear and rotary encoders now offers 1nm and 2nm resolutions, a dual output encoder interface and is also available with Renishaw’s Dual Signal Interface (DSI).

The higher resolution options comprise a standard Tonic readhead and interfaces that apply high interpolation rates to achieve very fine resolution and low jitter levels of 0.51nm RMS.

For applications requiring one or more operations to be synchronised with a motion axis, the dual-output interface simultaneously provides analogue and digital signals.

For high accuracy angle encoding, the Tonic DSI allows two readheads to be used to improve the accuracy and repeatability of a motion system by eliminating eccentricity, bearing wander and all ‘odd’ error harmonics.

Renishaw’s AM4096 magnetic encoder IC offers 12-bit resolution (4,096 steps per turn) and is capable of high-speed operation to 30,000rev/min.

Developed by Renishaw’s associate company RLS, it provides UVW outputs with 16 poles (eight-pole pairs), incremental, absolute, linear (potentiometer), tacho generator and sinusoidal outputs.

Typical applications include commutation and high-speed motor control, position and velocity control, potentiometer replacement and optical encoder replacement.

The Mtec show takes place at the NEC, Birmingham, UK, from 27-28 April 2010.

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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