Influence of Slicing Strategy on FFF Parts Dimensional Deviations

Abstract:

Dimensional accuracy is critical in industrial applications and can limit the use of Fused Filament Fabrication FFF. The printing steps required in material extrusion: pre-processing, processing, and post-processing influence dimensions. While processing and post-processing steps lead to inaccuracies due to machine limitations, dimensional errors from the pre-processing step are motivated by inadequate representations and mathematical approaches. This work studies if the slicing approach can contribute to dimensional deviations. It is considered a pyramid sample with four different wall angles to check this hypothesis. Next, its CAD model is sliced using three approaches: inclusive, middle, and exclusive. The resulting gcodes were compared against the theoretical pyramid sections to quantify deviations. It is worth mentioning that each slicing approach shows a different deviation curve along the printing direction and the wall angle. These results highlight the slicing strategy as a potential source of dimensional inaccuracies. Finally, three sample cases (one for each slicing strategy) are printed, measured, and compared using a 3D scanner and conventional measurements to support the numerical examples.

• Periodical: Key Engineering Materials (Volume 959)
• Pages: 57-63
• DOI: https://doi.org/10.4028/p-1AxyVc
• Online since: October 2023
• Authors: Laura Robles-Lorite, Rubén Dorado Vicente*, Eloísa Torres-Jiménez, Alberto José García Collado
• Keywords: 3D Printing, Accuracy, Pre-Process, Slicing Software

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