Renishaw’s new SiGNUM encoder range offers high speed, reliable, non-contact performance combined with advanced features including the
IN-TRAC auto-phase optical reference mark and dynamic signal processing. The RESM optical angle encoder comprises the RESM ring, the SR readhead and Si interface. The RESM is a one-piece stainless steel ring with 20µm graduations marked axially on the periphery. It features the
IN-TRAC optical reference mark, which is repeatable in both directions at speeds over 4,500rpm (Ø52mm) and up to 85oC.
The RESM angle encoder boasts impressive performance; with accuracy to ±0.5 arc second and resolution and repeatability to 0.02 arc second, it suits the most demanding precision applications. The low profile ring is available in a wide range of sizes (Ø52mm to Ø417mm) and line counts, all of which feature a large internal diameter for flexible integration. Renishaw’s patented taper mount minimises installation errors and simplifies integration, whilst RESM’s low mass, low inertia design guarantees the highest system accuracy and dynamic performance.
The SR readhead offers high speed, high temperature performance, (up to 85oC and over 4,500rpm). Like all Renishaw encoders, it benefits from unique filtering optics, which provide excellent immunity to dirt, dust and scratches. In addition, the RESM encoder uses SiGNUM intelligent signal processing to ensure excellent reliability and ultra-low cyclic error (<±40nm), whilst comprehensive SiGNUM software enables optimum set-up and real-time system diagnostics via a PC’s USB port.
Precision rotary axes require reliable and accurate encoders for angular position feedback. The low profile RESM offers exceptional accuracy in a compact and easy-to-install format. While the large internal diameter simplifies the routing of cables and other supplies through the machine, the Si interfaces can be mounted remotely and a small connector on the readhead cable can easily be fed through the machine where access is restricted. In addition, the non-contact, modular RESM is ‘taper-locked’ to the machine’s shaft, ensuring a compact table design and the elimination of coupling losses, oscillation, shaft torsion and other hysteresis errors that plague sealed encoders.