Additive Manufacturing becomes most widely uses in prototyping and production applications since 3D printer becomes as open-source. However, there are not provide standard value of printing process parameters to give best performance of mechanical properties of the printed parts. In additional, printed parts produced can be affected by the various parameters used, this nature of phenomena very complex. The purpose of this research is to evaluate the effects printing process parameters respond to its mechanical properties in tensile strength and flexural strength from Fused Filament Fabrication by using Polylactic Acid (PLA) with printing parameters, namely printing temperature, printing speed and raster angle. The specimens were printed by using Monoprice Maker Select 3D printer. Tensile test and three-point bending test were carried out. Taguchi Method involves in identification of proper control factors to obtain the optimum results of the process. Orthogonal Arrays (OA) are used to conduct a set of experiments. Results of these experiments analyze by using Analysis of Variance (ANOVA) to predict the quality of components produced and find influence of printing temperature, printing speed and raster angle on mechanical properties. The results show that raster angle have most influence on both mechanical properties with 68.72% contribution, printing speed 18.88% and temperature 1.49% contribution in tensile test while for bending test raster angle obtain 94.02% contribution, printing speed give 2.28% and temperature only 1.67% contribution. Optimum value obtain for tensile test in this study shows temperature = 180°C, printing speed = 40 mm/s, and raster angle = 60°. In bending test gives temperature = 185°C, printing speed = 30 mm/s, and raster angle = 60°.
