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Renishaw's new SiGNUM™ family of rotary and linear encoders applies that same formula of ruggedness and precision to deliver levels of performance previously possible only from fine-pitch systems too delicate for many industrial roles.

The advanced SiGNUM™ encoder range offers high accuracy, resolution and repeatability with high speed, high operating temperatures, ultra-low cyclic error and innovative IN TRAC™ optical reference mark, which remains phased over the entire speed and temperature specification. The system offers intelligent signal processing, ensuring excellent reliability and ultra-low cyclic error (typically <±40 nm), whilst comprehensive SiGNUM™ software enables optimum set-up and real-time system diagnostics via a PC's USB port.

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The SiGNUM™ RESM angular encoder is a one-piece stainless steel ring with 20 micron scale marked directly on the periphery. It features the IN-TRAC™ optical reference mark, which repeats, regardless of direction, at operational speeds of over 4,500 rev/min (52 mm diameter) and up to 85° C.

The SiGNUM™ RELM high accuracy linear encoder comprises the SR readhead, Si interface and 20 micron RELM scale, which is offered in defined lengths. Initially available in Invar, which provides a low thermal expansion of 1.4 micron/m/°C, the RELM scale is offered with a choice of IN-TRAC™ reference mark positions and dual optical limits. Together with the robust, yet highly precise 20 micron spars, this enables the RELM to offer accuracy to ±1 micron and resolution to 20 nm, satisfying the most demanding precision motion requirements.

Renishaw offers a complete range of high specification linear encoders, easy set-up XY encoders, high resolution rotary/angular encoders and an extensive selection of interpolators, interfaces and other accessories are available.

The success of Renishaw's encoder systems is based on an innovative open optical scheme. The design provides excellent metrology and high resolution, and can withstand a variety of contaminants such as dust, light oils and scratches without compromising the signal's integrity. This ensures that our customer's machines run reliably without excessive routine servicing.

Renishaw's encoder systems are applied in almost all sectors of industry including metrology, motion systems, electronics, semiconductor handling, medical, scanning/printing, scientific instruments, space research, photography and specialist machine tools. In simple terms; where there's a need for precision motion control, there's a need for precision linear encoders.