Polylactic acid (PLA) is a popular and widely used thermoplastic material used in fused filament fabrication (FDM) due to its biodegradability and biocompatibility. This paper aims to study the effects of extrusion parameters on the tensile strength quality of the 3D printing filament. The research began by extruding a 3D850D grade PLA pellet from Ingeo, NatureWorks, USA into a single filament extruder machine with an extrusion temperature range from 165 °C to 185 °C and a screw rate of 2 rpm to 6 rpm. The dog bone design (ASTM D638) with a 90° raster angle of line pattern and 100 % infill density was used for the fabrication of 3D printed specimens. Taguchi method was implemented to design the experiment to achieve the optimized parameters, and lastly, a tensile test was conducted to analyse the strength quality of the extruded filament through the 3D printing process. The result of the current study shows that the optimum extrusion temperature and speed that achieve the highest tensile strength with a good filament size of PLA-3D850 is around 175 °C and 4 rpm respectively.
