A Review on Process Parameters of Additive Manufacturing

Abstract

– The importance of dimensional accuracy in produced models has been highlighted by the use of FDM technology for prototyping in industries such as aerospace and medical. Several process factors, such as layer thickness, raster width, infill pattern, etc., can impact the dimensional accuracy of FDM-printed objects. The goal of this research is to conduct a systematic literature review of studies that examined the impact of process parameters on the dimensional accuracy of FDM printed parts. This will allow us to better understand the effect of each parameter individually and to find the optimal levels of each parameter based on the material types. The effects of layer thickness, extrusion temperature, and component orientation on common materials like ABS and PLA were outlined, along with a review of 29 related papers. Tables summarized the key findings from each study, revealing the optimum value for each process parameter and describing the articles' respective methods. Layer thickness levels between 0.1 and 0.2 millimetres are recommended for ABS and PLA parts, whereas higher layer thickness values are typically associated with greater precision for ASA and Nylon parts. The extrusion temperature is determined to be optimally low, and this parameter is also less sensitive to variations in the material being used. With regards to part orientation, it has been determined that 0 degrees is best for ABS printed parts while 90Ois best for PLA printed parts. Furthermore, additional factors like the geometry of the part, the type of resin, and the varying dimensions of the part are likely to affect the ideal level of each process parameter. It is important to account for the impact of confounding variables when trying to understand the effect of each process parameter on the dimensional accuracy of FDM printed items.