Which property is crucial for ensuring stability in the printed part during FDM printing?

The crucial property for ensuring stability in the printed part during Fused Deposition Modelling (FDM) printing is print layer thickness. A consistent and appropriate layer thickness contributes significantly to the overall strength and adhesion of the layers as they are built upon one another.

When the layer thickness is too thick, the extruded material may not adequately bond with the previous layer, leading to weak spots and potential delamination, which compromises the stability of the part. Conversely, if the layer thickness is too thin, while it may improve detail, it can extend print time significantly and may not add sufficient structural integrity, especially for larger parts.

Therefore, choosing the right layer thickness is essential as it directly affects how well the material adheres together, the overall structural integrity of the model, and its ability to withstand stress during both the printing process and in its final application.