Which factor plays a crucial role in determining the mechanical properties of parts produced via additive manufacturing?

Layer height is a critical factor in determining the mechanical properties of parts produced via additive manufacturing, especially in processes such as Fused Deposition Modeling (FDM) and Stereolithography (SLA). The thickness of each layer directly influences the interlayer bonding and overall finish of the print. Thinner layers typically result in better resolution, improved surface finish, and stronger mechanical properties due to more effective fusion between layers. As the layer height increases, the effect of layer lines becomes more prominent, which can lead to weaker mechanical properties and a rougher surface finish.

Additionally, thinner layers allow for better control of the extrusion process, reducing the likelihood of defects such as voids or incomplete fusion, which can further impact mechanical performance. Therefore, layer height is not just a matter of aesthetic quality but is intrinsically linked to the functionality and strength of the final part.

Although print speed, the type of adhesive used, and the size of the printer can influence various aspects of the additive manufacturing process, they do not have as direct an impact on the fundamental mechanical properties of the produced parts as layer height does.