Yeung, H.
, Lane, B.
, Donmez, M.
and Moylan, S.
(2020),
In-situ calibration of laser/galvo scanning system using dimensional reference artefacts, CIRP Annals-ManufacturingTechnology, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=929916
(Accessed October 13, 2025)
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In-situ calibration of laser/galvo scanning system using dimensional reference artefacts
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Abstract
Laser powder bed fusion systems use a high-power laser, steered by two galvanometer (galvo) mirrors to scan a pattern on metal powder layers. Part geometric tolerances depend on the positioning accuracy of the laser/galvo system. This paper describes an in-situ calibration technique utilizing a camera coaxially aligned with the laser imaging a dimensional reference artefact. The laser positions are determined from the images captured by the camera while scanning the artefact. The measurement uncertainty is estimated using simulations. The in-situ calibration results are compared with the results obtained from the typical 'burn and measure' galvo calibration method.Citation
CIRP Annals-ManufacturingTechnology
Pub Type
Journals
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Keywords
Selective laser melting (SLM), Positioning, Galvo Calibration
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Created May 16, 2020, Updated October 7, 2020