Manufacturing Technology 2018, 18(3):372-378 | DOI: 10.21062/ujep/108.2018/a/1213-2489/MT/18/3/372

Optimizing Fabrication Outcome in Low-cost FDM Machines. Part 1 - Metrics

Francesco Buonamici, Monica Carfagni, Rocco Furferi, Lapo Governi, Marco Saccardi, Yary Volpe
Department of Industrial Engineering of Florence, University of Florence - Via di Santa Marta 3, 50139, Firenze, Italy

Several models of FDM machines, characterized by different architecture and hardware components, have flooded the market in the last 5 years. As a result, given the high sensitivity of FDM to the specific machine characteristics, the search for optimal printing parameters is a renown problem. This two-parts paper proposes an easy-to-follow and low-cost procedure for the characterization of any given FDM machine. The method allows the evaluation of the effects of a wide selection of FDM process parameters on the quality of 3D printed parts. The first part focuses on the definition of a series of metrics to be measured on a series of test prints to evaluate the quality of the produced parts. Specifically, several effects are considered: dimensional accuracy, small details, overhang surfaces, ability of printing small holes/thin extrusions and overall quality of the prints. The evaluation of seven quality parameters on a single print is made possible thanks to: i) a specifically designed specimen that is made available to the user and ii) a rigorous and repeatable measurement procedure, which are both discussed in the first part of the paper. The second part presents the characterization procedure, the statistical tools used in the experimentation and provides guidelines to be used for the characterization of any FDM machine. The whole procedure is tested on a desktop FDM machine to demonstrate obtainable results.

Keywords: Additive Manufacturing (AM), Fused Deposition Modeling (FDM), Process Optimization, Design of Experiments (DOE), 3D Printing

Published: June 1, 2018  Show citation

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Buonamici F, Carfagni M, Furferi R, Governi L, Saccardi M, Volpe Y. Optimizing Fabrication Outcome in Low-cost FDM Machines. Part 1 - Metrics. Manufacturing Technology. 2018;18(3):372-378. doi: 10.21062/ujep/108.2018/a/1213-2489/MT/18/3/372.
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