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XR20-W rotary axis calibrator

Rotary axes are increasingly common on machine tools and their accuracy is vitally important to overall machine accuracy.

Measurement of rotary axes with an accuracy up to ±1 arc second

Totally wireless operation and modular mounting systems ensure suitability for a wide range of machines. Optional software allows operation 'off-axis', essential for many 5 axis machines.

XR20-W rotary axis calibrator overview

“With the features of the XR20-W (easy and flexible setup due to its size and weight, wireless operation and user-friendly software), we have reduced our test setup time by 40% and test run time by 20%. An added benefit is that wireless testing has allowed safer testing making supervision a non issue. As a result we do not disrupt shop floor activity, a great attraction to our operations and quality procedures.”

Hurco (Taiwan)

Features and benefits

XR20-W rotary axis calibrator provides a high integrity, non-contact reference measurement, remote from the axis under test.

Automated calibration

The XR20-W is motorised and data capture is synchronised to axis movement, i.e. no operator intervention required during data capture.

High accuracy and repeatability

All Renishaw systems are factory calibrated and delivered with traceable certification. The measurement accuracy is:

  • ±1 arc second with XL-80
  • ±1.2 arc second with XM-60

Wireless operation

  • Lithium batteries and Bluetooth® communications give truly wireless operation
  • Provides for easier and quicker set up and avoids issues with trailing cables, eliminating the safety hazard these create
  • Bluetooth enabled (internally or with USB Bluetooth adaptor - Microsoft stack only).

Flexible mounting system

  • The measurement system is now separate from the mounting system
  • This modular approach allows far simpler and quicker set-up and can be configured for a wide variety of rotary tables, lathes and other rotary axes

Compact and light weight

  • Handling and fixing on machine can be achieved single handed
  • Easy cost effective transportation
  • Clearance issues on machine minimised

Integrated target and alignment optics

  • Factory set alignment of retro-reflectors to XR20-W measurement axis minimises alignment and resulting measurement errors
  • A simple optical alignment aid helps minimise measurement errors. Alignment adjustments can even be made via software, providing quicker and safer working for the operator

Extended auto calibration and pre-test cycles

  • Pre-measurement calibration cycle compensates for remaining angular alignment errors
  • Data sampling during test overrun detects and sets axis direction sense and axis feedrate

Servo controlled drive

  • Rotary axis measurement speeds for larger angles (>5°) of up to 10 rpm
  • Uses unique, integrated rotary encoder technology


  • CARTO software supports on axis rotary measurement using XL-80 or XM-60
  • Provides part program generation for rotary axes
  • Includes powerful data analysis

Off axis capability

  • Off axis rotary software* allows use of XR20-W in many machine configurations where it is difficult to mount the system directly on the machines rotary axis pivot point
  • Provides a solution for testing many five axis machines
  • Only compatible with RotaryXL and LaserXL software

  * When used with suitable mounting bracket

Kit contents

  • XR20-W kit contentsXR20-W
  • Mounting ring
  • Adaptor plate
  • Centration aid
  • Chuck adaptor
  • Battery charger
  • Batteries x 3
  • USB cable and mains adaptor

Product information