In the field of additive manufacturing (AM) processes, there is a significant lack of scientific data on the performance of open-source 3D printers in relation to process parameter values. The purpose of this paper is to assess the impact of the main process parameters on the accuracy of a set of typical geometric features, as obtained with an open-source 3D printer, the RepRap Prusa-Mendel I2. For this purpose, a benchmarking part was set up, composed of elementary shapes, representing a series of different geometric features. By means of a DoE approach, it was possible to assess the effects of two process parameters—layer thickness (Lt) and flow rate (Fr)—on five geometric features: cube, sphere, cylinder, cone, and angled surface. A high resolution Laser Scanner was used to evaluate the variation between the acquired geometric feature and the corresponding 3D computer-aided design (CAD) nominal model. On the basis of experimental results, it was possible to analyze and discuss the main effects of the above-mentioned process parameters on each geometric feature. These results can help RepRap users in the correct selection of process parameters with the aim of improving the quality of prototypes.
On the Geometric Accuracy of RepRap Open-Source Three-Dimensional Printer
Contributed by the Design for Manufacturing Committee of ASME for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received March 15, 2015; final manuscript received July 28, 2015; published online September 2, 2015. Assoc. Editor: Christopher Williams.
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Lanzotti, A., Del Giudice, D. M., Lepore, A., Staiano, G., and Martorelli, M. (September 2, 2015). "On the Geometric Accuracy of RepRap Open-Source Three-Dimensional Printer." ASME. J. Mech. Des. October 2015; 137(10): 101703. https://doi.org/10.1115/1.4031298
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