What could be an effect of high extrusion temperatures in FDM printing?

High extrusion temperatures in Fused Deposition Modelling (FDM) printing can lead to poor layer adhesion due to overheating of the filament. While higher temperatures can sometimes improve flow, they can also cause the filament to become too fluid, which may result in insufficient bonding between layers. When the material is extruded at an excessively high temperature, the layers might not fuse together effectively because the heated material can lose its structural integrity, leading to gaps or weak spots between layers.

In contrast, higher temperatures do not inherently increase printing accuracy, as the excessive fluidity can lead to inconsistencies in the printed part's dimensions. While some may assume that printing at higher temperatures might reduce print time, it can also potentially introduce problems such as warping or oozing, which could negate any time savings. Similarly, less stringing, which refers to the formation of unwanted threads of filament during printing, typically occurs at lower extrusion temperatures where the material is less likely to flow from the nozzle when not actively printing. Therefore, maintaining appropriate extrusion temperatures is critical for optimal layer adhesion and print quality.