Analysis of the Accuracy and the Surface Roughness of FDM/FFF Technology and Optimisation of Process Parameters

Abstract

The work deals with the influence of process parameters on the quality and accuracy of parts produced by FDM (Fused Deposition Modelling)/FFF (Fused filament fabrication) technologies. The experiments were carried out on the 3D Ultimaker printer, PLA (Polylactid Acid) thermoplastics were used as the test materials. The practical part is divided into 3 experiments. First, the optimum temperature was set. In the next part, the parameters of retraction rate, retraction length and crossing speed were determined. In the last part, the impact of 13 parameters on the printing time, material consumption, surface quality and accuracy were determined. In this part of the experiment, the effect of the factors on the quality indicators was determined using the DoE Taguchi methodology. Subsequently, the influential parameters were determined by Paret's rule. The results showed how layer height and print speed are the most important factor for the print time. The parameters-percent filling, number of walls, and the height of the layer were marked as essential parameters affecting the material's consumption. The surface roughness and dimensional accuracy are most influenced by the height of the layer.

Toward data-driven research: preliminary study to predict surface roughness in material extrusion using previously published data with machine learning

“…In general, the experimental studies confirm that layer height is critical for surface roughness (Pérez et al , 2018), but the effect of other printing parameters on surface roughness is not well known yet. For instance, Mendricky and Fris (2020) identified the influence of printing speed on surface roughness, whereas Yang et al (2020) found that this factor did not influence this output. Consequently, there is still a research gap that requires more testing to validate published findings.…”

Design of experiments to compare the reprocessing effect with Fused Deposition Modeling printing parameters on mechanical properties of Polylactic Acid specimens towards circular economy

“…It plays an important role as higher retraction speeds can result in stringing issues, whereas lower speeds can lead to the generation of blobs within the print. 65 A retraction speed of 25 mm/s has been adopted for this work. Lastly, Printing speed depicts the motion of the axes motors as well as the extruder motors.…”

Analysis of the Effect of the Surface Inclination Angle on the Roughness of Polymeric Parts Obtained with Fused Filament Fabrication Technology

“…Galietto et al [ 5 ] and Mendicky et al [ 6 ] considered processing parameters such as deposition speed, layer height and infill density. Surface roughness was significantly influenced by these factors, according to the external geometry of the parts.…”