What is one of the primary roles of support structures in 3D printing?

Support structures play a crucial role in 3D printing, particularly in processes like Fused Deposition Modelling (FDM), where certain geometries require additional material to ensure successful fabrication. The primary function of these support structures is to provide structural integrity during the printing process. They are essential for stabilizing overhangs, bridges, and complex features that cannot be printed in mid-air. Without adequate support, these components might sag or collapse, leading to printing failures and the need for reprints.

Support structures are typically made from the same material as the main part or, in some cases, from a different material that is easier to remove after printing. Their careful design allows for the main object to be printed correctly, maintaining the desired shape and precision. While aesthetics, visibility, and filament usage are also important considerations in 3D printing, they do not address the fundamental need for support during the actual printing process itself.