Certain machinery safety functions, such as Safely Limited Speed (SLS), require the encoder feedback to be functionally safe. Utilising an encoder system that is already rated for use in safety-related applications can make machine certification significantly easier. Adopting these advanced machine safety functions allows machine builders to make safer machines, capable of higher functionality that reduce set-up times and machine downtime.
For safety critical applications, Renishaw offers a range of functionally safe position encoder solutions certified to the following international safety standards:
ISO 13849 Category 3 PLd
IEC 61508 SIL2
IEC 61800-5-2 SIL2
The TONiC FS series offers all the benefits of the established TONiC™ linear and angle encoder systems. For exceptional metrology performance and ultimate reliability, TONiC readheads incorporate Renishaw's market proven third generation filtering optics; these are further enhanced by dynamic signal processing including Auto Gain Control and Auto Offset Control. The result is low Sub-Divisional Error (SDE) and even lower noise (jitter) giving smoother velocity control for improved scanning performance and increased positional stability.
The RESOLUTE FS series offers all the benefits of the established RESOLUTE™ linear and angle encoder systems. The RESOLUTE encoder uses a single optical absolute track with a nominal pitch of 30 μm, combined with sophisticated optics. This ensures wide set-up tolerances, very low Sub-Divisional Error of ±40 nm and ultra-low noise (jitter) of less than 10 nm RMS, resulting in better velocity control performance and excellent positional stability. Reliability is assured by RESOLUTE's high dirt immunity, built in separate position checking algorithm and IP64 sealed readhead with wipe clean recovery.