Renishaw RCU10, Installation And User Manual, Page: 13 / 202

1-2 System overview
1.1 Introduction
This manual covers the installation, configuration and operation of the Renishaw RCU10
real-time quadrature compensator system.
1.2 System overview
The RCU10 real-time quadrature compensation system overcomes environmental error
sources in linear motion systems to improve process accuracy and repeatability. The
RCU10 monitors a machine’s ambient environment, via a network of sensors, and uses
advanced digital signal processing to perform real-time compensation on the position
feedback signals.
The RCU10 can provide:

Refractive index compensation, for laser encoders, using air pressure and
temperature sensors.

Scale thermal expansion compensation, for incremental linear encoders, using
material temperature sensors.

Thermal expansion compensation of machine structure and workpieces, using
material temperature sensors.

Format conversion – digital (A quad B) to analogue (Sin/Cos)

Scale factor conversion – laser wavelength to engineering units
Figure 1.1 – RCU10-P with sensors