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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 axis positional accuracy to within ±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

Measurement accuracy of ±1 arc second. All Renishaw systems are factory calibrated and delivered with traceable certification.

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

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

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

  * When used with suitable mounting bracket

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

Data collection software

  • RotaryXL enables quicker and more consistent test set up to give faster test results with increased confidence
  • Rotary software kit includes RotaryXL software, XCal-View data analysis software and system manual

Servo controlled drive

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

Kit contents

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


  • Bluetooth enabled (internally or with USB Bluetooth adaptor - Microsoft stack only).

Product information