GEOMETRIC ACCURACY OF FDM PRINTING – FROM CAD MODEL TO REALITY
Published in GÉP 2026/2
https://doi.org/10.70750/GEP.2026.2.3
Garay Richárd
tanszéki mérnök, Debreceni Egyetem Műszaki Kar Gépészmérnöki Tanszék
Nemes Dániel
tanársegéd, Debreceni Egyetem Műszaki Kar Gépészmérnöki Tanszék
ABSTRACT
This research provides a comprehensive statistical model of the geometric accuracy and surface roughness of parts manufactured using FDM (Fused Deposition Modeling) technology. Additive manufacturing today is no longer limited to prototyping, the technology is now used to produce parts in mass production, making an understanding of manufacturing variations essential for establishing reliable tolerance limits. Data was collected using various measurement techniques, including digital calipers, micrometers, structured light 3D scanning, and a roughness tester. The study characterizes deviations from nominal CAD values across different size categories using statistical indicators. The final result provides a framework for the maximum tolerance limits recommended based on ISO 286 IT classes, which is specifically tailored to the parameters of the FDM process under investigation.
