Özet:

Abstract Fused Filament Fabrication (FFF) is categorized as an additive manufacturing process, recognized as the simplest way to accomplish 3D printing. Previous studies have proven that FFF can be trusted to create custom parts with high complexity. However, some performance issues still exist with this method that must be resolved to improve conventional manufacturing techniques. One of them is its repeatability performance that is debatable when it comes to producing repetitive runs of similar parts. Printing parameter is one of the factors that play a significant role on the repeatability performance of parts produced. In this study, the effect of layer thickness on the repeatability of 3D printed PLA, produced using an Openware 3D printer (Espresso F220), was investigated. Two product geometries (Part A and Part B) were produced. Layer thickness was chosen as a variable parameter (0.1 mm, 0.2 mm, and 0.3 mm) for each geometry. Data to measure repeatability of the printed PLA parts were determined based on the measurements of length, width, thickness and surface roughness for each geometry. Then, repeatability performance was analyzed through One-way ANOVA analysis. From the results, the layer thickness parameter did influence dimensional quality and repeatability of samples produced. Part length and thickness offered better repeatability performance, to both product geometries being compared, in width and surface roughness. The study reveals that variations in sample properties depends on not only one, but also every printing parameter involved. Repeatability performance can be improved by identifying the ideal combination of printing parameters to produce good part quality.

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