What outcome results from poor dimensional accuracy in FDM printing?

Poor dimensional accuracy in Fused Deposition Modelling (FDM) printing can lead to functional failure. This occurs because components may not fit together correctly or may not meet the required specifications for their intended use. Dimensional inaccuracies can cause parts that are meant to interlock to be too tight or too loose, resulting in a failure to assemble as designed. Additionally, if the dimensions of a printed part are too far from the intended measurements, the part may not perform its function properly, which is critical in applications such as mechanical assemblies, hinge designs, or any fitting components.

The alternative outcomes listed, such as improved print speed, increased strength, or enhanced aesthetics, are not typically associated with poor dimensional accuracy. In fact, poor accuracy may lead to increased printing time due to rework or redesign, diminished strength due to inadequate fitting and bonding of layers, and a more unfavorable appearance if the dimensions don't align well with design intent. Thus, functional failure aligns most directly with the consequences of inaccuracies in dimension.