Renishaw: RESOLUTE™ ETR (Extended Temperature Range) Absolute Encoder RA26BTA100B30F

RESOLUTE ETR is a revolutionary true absolute, fine pitch optical angle encoder system, with excellent dirt immunity, wide set-up tolerances, fine resolution and now with guaranteed operation down to −40 °C (−40 °F).

RESOLUTE combines 18, 26, or 32-bit resolution with exceptionally high speeds of up to 18 000 rev/min (50 meters/second) and high accuracy stainless steel ring scales.

RESOLUTE uses a unique single optical absolute track (a world first) of 30 μm pitch, combined with sophisticated optics to ensure wide set-up tolerances and impressive low-noise performance. The detection method also intrinsically provides very low sub-divisional error of ±40 nm and ultra-low noise (jitter) less than 10 nm RMS, resulting in better velocity control performance and rock-solid positional stability. Operation down to −40 °C (−40 °F) in non-condensing environments is guaranteed, making this product suitable for use in applications such as telescopes, scientific research, military and aerospace. The encoder is also tough enough to survive the physical punishment of harsh environments, with high vibration resistance and solid stainless-steel ring scales. Reliability is assured by RESOLUTE’s excellent dirt immunity and built-in separate position-checking algorithm, which actively checks every reading.

Specifications
• True absolute non-contact optical encoder system: no batteries required
• Operates down to −40 °C (−40 °F) and up to +80 °C (+176 °F)
• Wide set-up tolerances for quick and easy installation
• High immunity to dirt, light oils and scratches
• Resolutions of 18, 26 or 32 bit
• 50 m/s maximum speed for all resolutions (to 18 000 rev/min)
• 30 µm nominal scale pitch ensures exceptional motion control performance
• ±40 nm sub-divisional error for smooth velocity control
• Less than 10 nm RMS jitter for improved positional stability
• Built-in separate position checking algorithm provides inherent safety • High shock and vibration resistance
• Solid stainless-steel ring scales
• IP64 sealed readhead for high reliability in harsh environments
• Integral set-up LED enables easy installation and provides diagnostics at a glance
• Readhead and rings are bolt hole compatible with SiGNUM™ encoders
• Integral over-temperature alarm
• BiSS ® pure serial communications for high RFI immunity