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A five degrees-of-freedom errors measurement system for rotary axis with reference laser for reference axis

Li Liu1, Zhi-Feng Lou1, Yu-Bin Huang1

  • 1Key Laboratory for Precision and Non-Traditional Machining Technology, Ministry of Education, Dalian University of Technology, Dalian 116024, China.

The Review of Scientific Instruments
|August 6, 2020
PubMed
Summary
This summary is machine-generated.

This study introduces a five degrees-of-freedom system for measuring rotary axis geometric errors using a diode laser. The system accurately separates position-independent and dependent errors, achieving high precision for radial, tilt, and angular measurements.

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Area of Science:

  • Metrology
  • Mechanical Engineering
  • Optical Measurement Systems

Background:

  • Rotary axes are critical components in precision machinery.
  • Accurate measurement of geometric errors is essential for performance.
  • Existing methods may lack comprehensive error separation capabilities.

Purpose of the Study:

  • To develop a novel five degrees-of-freedom (5-DOF) measurement system.
  • To accurately measure geometric errors of a rotary axis.
  • To establish a model for separating position-independent and position-dependent errors.

Main Methods:

  • Utilized a diode laser for precise alignment of the rotary axis.
  • Developed a 5-DOF measurement system.
  • Established and experimentally verified a mathematical model for error separation.

Main Results:

  • The measurement system demonstrated high accuracy.
  • Measurement uncertainty for radial motion was < ±1.6 µm.
  • Measurement uncertainty for tilt and angle position was < ±1.7 arc sec and < ±1.3 arc sec, respectively.

Conclusions:

  • The proposed 5-DOF system effectively measures rotary axis geometric errors.
  • The developed model successfully separates position-dependent and independent errors.
  • The system offers high precision and reliability for metrology applications.