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PUBLICATIONS

Development of an in-situ laser calibration method for multi-laser powder bed fusion additive manufacturing system

Published

Author(s)

Ho Yeung, David Deisenroth, Sergey Mekhontsev

Abstract

A new in-situ laser calibration method for multi-laser powder bed fusion (L-PBF) systems has been developed to address the prevalent challenges of part quality at the stitched regions due to misalignments of different lasers. In the proposed method, cameras coaxially aligned with the processing lasers are utilized, capturing images of a dimensional reference artifact during scanning and reconstructing the scan path from these images in the artifact's coordinates. This enables an automated and precise calibration of each laser to a unified global coordinate system without the necessity of external measurements. Preliminary tests show that the patterns scanned by two different laser systems are highly superimposed, with errors less than 20 micrometers. This method is expected to enhance the efficiency and quality of multi-laser L-PBF systems by ensuring precise alignment and synchronization of laser beams.
Conference Dates
August 23, 2024
Conference Location
Austin, TX, US
Conference Title
The 35th ANNUAL INTERNATIONAL Solid Freeform Fabrication SYMPOSIUM
Pub Type
Conferences

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Local Download

Keywords

Multi-laser calibration, galvo calibration
Manufacturing

Citation

Yeung, H. , Deisenroth, D. and Mekhontsev, S. (2024), Development of an in-situ laser calibration method for multi-laser powder bed fusion additive manufacturing system, The 35th ANNUAL INTERNATIONAL Solid Freeform Fabrication SYMPOSIUM, Austin, TX, US, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=958575 (Accessed October 1, 2025)

Issues

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Created August 14, 2024, Updated March 3, 2025
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