In-situ calibration of laser/galvo scanning system using dimensional reference artefacts
Ho Yeung, Brandon M. Lane, M A. Donmez, Shawn P. Moylan
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.
, Lane, B.
, Donmez, M.
and Moylan, S.
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 July 7, 2022)