Product category:
Rotary Position, Tilt and Angular Sensors
News Release from: Renishaw | Subject: Encoder catalogue
Edited by the Engineeringtalk Editorial
Team on 18 January 2006
Catalogue covers encoders
Renishaw's latest catalogue includes compact optical and magnetic encoder systems for industrial automation.
Renishaw's latest catalogue includes compact optical and magnetic encoder systems for industrial automation The catalogue covers linear, angle, magnetic and laser encoders
Additions include the Relm high accuracy linear scale, high-performance high-vacuum encoders, high resolution laser interferometer encoders, and details of improvements in speed, resolution and reliability to standard optical encoder lines of RG2 and RG4 linear encoders.
The firm's micron, nanometer and picometer position feedback systems are for laboratory and medical instrument applications, semiconductor manufacturing equipment, machine tools, metrology systems and aerospace assembly machines.
Metal scales avoid the fragility of glass encoders, while non-contact readheads and filtering optics avoid the bulkiness, hysteresis and wear of traditional industrial encoders.
A Signum family of rotary and linear encoders applies that same formula of ruggedness and precision to deliver performance similar to fine-pitch systems.
The Signum encoders have high accuracy, resolution and repeatability with high speed, high operating temperatures, low cyclic error and In-Trac optical reference mark, which remains phased over the entire speed and temperature specification.
The system provides intelligent signal processing and a cyclic error typically less than +/-40nm.
The Signum software enables optimum set-up and real-time system diagnostics via a PC's USB port.
The Signum Relm high accuracy linear encoder comprises the SR readhead, Si interface and 20um Relm scale, which is offered in defined lengths.
Initially available in Invar, which provides a thermal expansion of 1.4um/m/C, the Relm scale comes with a choice of In-Trac reference mark positions and dual optical limits.
Together with the robust yet precise 20um spars, this enables the Relm to offer accuracy to +/-1um and resolution to 20nm.
The Signum RESM angular encoder is a one-piece stainless steel ring with 20um scale marked directly on the periphery.
It has the In-Trac optical reference mark, which repeats, regardless of direction, at operational speeds of over 4500rev/min (52mm diameter) and up to 85C.
The magnetic encoders are available in component, modular and packaged shaft-style models, including the RM family of magnetic encoders which offers up to 4096-count positioning resolution, accuracy to 0.3deg and operating speeds to over 30,000rev/min.
Non-contact magnetic design eliminates seals, bearings and moving parts.
Standard models provide shock and vibration resistance, while optional sealed models allow applications in harsh environments and even immersion.
The RLE fibre optic laser interferometer encoders deliver interferometer-based nanometer positioning accuracy from a remote laser source - even to two axes.
Detector head choices (six in all) allow matching to various applications, including capability for picometer-level resolutions.
Fibre-optic beam delivery reduces optical path complexity, saves space on miniature machines, and keeps laser heat from affecting measurement axes.
Bolt down and dial in laser alignment enables ease of installation comparable with traditional tape- or glass-based encoders.
Applications include x-y stages, fibre-optic alignment machines, glass grinding machines, photomask machines and other precision motion systems.
An optional real-time compensation system enables positional accuracy of 1ppm (1um/m) in various environmental conditions. Request a free brochure from Renishaw ...
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