Renishaw will focus on its latest optical incremental encoders, optical absolute encoders and magnetic encoders when it exhibits at MTEC, the sensors, measurement and instrumentation show, which takes place at the NEC, Birmingham, UK, from 27-28 April 2010. Demonstrations will include a new 1nm resolution version of the TONiC incremental encoder, a magnetic chip encoder and the RESOLUTE absolute optical encoder for rotary and linear applications that is capable of 10 atoms resolution at 220mph.
Renishaw's RESOLUTE absolute optical encoder system gives an astonishing resolution of just 1nm at 100m/s for both linear encoder and angle encoder applications, yet it still offers excellent immunity to dirt. Absolute position is acquired immediately at system switch-on, so the exact orientation of the axis and motor commutation angle are known without the need for a reference (datum) return. Large set-up tolerances also enable easy installation and high reliability while low jitter and SDE (sub-divisional error) meet the demands of high-precision stages.
TONiC incremental optical linear and rotary encoders now offer 1nm and 2nm resolutions, a dual-output encoder interface, and units are also available with Renishaw's Dual Signal Interface (DSi). The new higher-resolution options comprise a standard TONiC readhead and new interfaces that apply high interpolation rates to achieve very fine resolution and low jitter levels of just 0.51nm RMS. For applications requiring one or more operations to be synchronised with a motion axis, the new dual-output interface simultaneously provides analogue and digital signals. For high-accuracy angle encoding, the new TONiC DSi enables 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 (4096 steps per turn) and is capable of high-speed operation to 30,000rpm. 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.
Follow the link for more information about Renishaw's range of position feedback encoders.