Renishaw: SiGNUM ENCODER SYSTEM READHEAD A-9570-2005

Renishaw’s SR readhead and Si interface are part of the SiGNUM range of optical encoders.

They have been designed for use with Renishaw’s range of high-accuracy RESM and REXM angle encoders and RSLM and RELM linear encoders which incorporate the IN-TRAC ™ bi-directional reference mark.

Like all Renishaw encoders, the SiGNUM range offers high-speed, reliable operation and open, non-contact performance with excellent immunity to dirt and electrical noise.

The interface incorporates dynamic signal control which, combined with the patented filtering optics, ensure excellent signal integrity and exceptionally low cyclic error.

The Si interface can be mounted remotely and a small connector on the readhead cable allows it to be fed easily through machines where access is restricted.

Interface unit (Si)

Si-NN-0004 – 5 µm

Si-NN-0020 – 1 µm

Si-NN-0040 – 0.5 µm

Si-NN-0100 – 0.2 µm

Si-NN-0200 – 0.1 µm

Si-NN-0400 – 50 nm

Si-NN-1000 – 20 nm

Si-HN-2000 – 10 nm

Si-HN-4000 – 5 nm

Si-NN-0000 – Analog

Si-NN-0001 – Low noise analog

System features

IN‑TRAC optical reference mark

• Integrated within the graduation for compact dimensions and simplified alignment

• Electronically phased, requiring no physical adjustment

• Sub-micron repeatability in both directions of travel over full operating temperature and speed range

• Mid-point (RELM and RSLM), end-point (RELE and RSLE), customer-selectable (RSLC) or distancecoded* (RSLD) location on linear scale system

Dynamic signal control

• Real-time signal conditioning for optimized performance across a range of operating conditions

• Includes Auto Gain Control (AGC), Auto Offset Control (AOC) and Auto Balance Control (ABC)

• Ultra-low cyclic error, typically

Calibration at the touch of a button

• Click of a mouse via SiGNUM software or CAL button on Si interface

• Optimization for all output signals

Integrated LED diagnostics

• Simplifies initial alignment and set-up

• Reference mark and limit status