How should the layers of an FDM print be oriented relative to compressive load?

In Fused Deposition Modeling (FDM) printing, the orientation of layers relative to the expected load is critical for optimizing the strength and durability of the final part. When subjected to compressive loads, the layers should be oriented perpendicular to the direction of the load.

This orientation is crucial because the layered structure of FDM parts creates potential weak points along the layer lines. If the compressive load is applied parallel to the layers, the layers may easily delaminate or fail since they are generally weaker along the layer interfaces. Conversely, if the layers are oriented perpendicularly to the compressive load, it allows the material's strength to be effectively utilized, providing greater resistance to any potential slippage or separation.

This geometrical consideration ensures that the part can absorb and distribute the load evenly, maximizing its structural integrity and performance in applications where compressive forces are prevalent. Thus, aligning the layers perpendicular to the compressive load is the best practice in FDM printing to enhance part strength.