What is the primary reason to maintain a specific thickness in FDM prints?

Maintaining a specific thickness in Fused Deposition Modelling (FDM) prints is crucial primarily to preserve structural integrity and prevent defects. When a component is designed with the appropriate thickness, it helps ensure that the part can withstand the intended loads and stresses without deforming or breaking. A uniform thickness allows for proper adhesion between layers, reducing the risk of delamination, which is a common failure mode in 3D printed parts.

In addition, the thickness influences the flow of the filament during the printing process. If the material is too thick or too thin, it can cause issues such as under-extrusion or over-extrusion, both of which can result in defects in the final product. Therefore, a well-considered thickness contributes significantly to the performance and reliability of the printed object.