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To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...

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Updated: May 16, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

Development of a spatial accuracy compensation method based on multi-beam laser interferometer.

Lihua Lei^1,2, Changjian Sun³, Zhangning Xie^1,2

¹Shanghai Institute of Measurement and Testing Technology, Shanghai, 201203, China.

Scientific Reports

|May 14, 2025

Summary

This summary is machine-generated.

A new multi-beam laser interferometer system simultaneously measures six-degree-of-freedom errors in CNC machine tools. This spatial error compensation significantly enhances machine tool accuracy and positioning precision.

Keywords:

Accuracy Error compensation Laser interferometer Spatial positioning

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Last Updated: May 16, 2025

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Published on: August 12, 2013

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

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Published on: April 26, 2014

Area of Science:

Metrology
Mechanical Engineering
Optical Instrumentation

Background:

Machine tools exhibit errors in multiple degrees of freedom, impacting precision.
Accurate measurement and compensation of these errors are crucial for advanced manufacturing.

Purpose of the Study:

To develop a mathematical model for spatial errors in machine tools.
To propose a multi-beam laser interferometer for simultaneous six-degree-of-freedom error measurement.
To create a spatial error measurement and accuracy compensation system for CNC machines.

Main Methods:

Established a mathematical model for motion axis errors, incorporating a 12-line method correction.
Designed a multi-beam laser interferometer using four lasers for versatile parameter measurement.
Implemented a software algorithm for spatial accuracy compensation based on interferometer data.
Verified angular error correction by measuring axes at different spatial coordinates.

Main Results:

Achieved simultaneous measurement of errors for six degrees of freedom.
Demonstrated significant improvements in linear positioning accuracy (96%), horizontal straightness (89%), and vertical straightness (55%).
Reduced average and maximum positioning deviations by 88% and 91%, respectively.

Conclusions:

The proposed multi-beam laser interferometer and spatial error compensation system effectively enhance CNC machine tool accuracy.
The system provides a viable solution for achieving high-precision manufacturing through advanced metrology.
Experimental validation confirms substantial improvements in various accuracy metrics.