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Support Structures and Organic

In FDM printing, each new layer must be deposited onto the solid foundation of the layer below.

Theoretical Background and Overhang Physics

In FDM printing, each new layer must be deposited onto the solid foundation of the layer below. When a feature projects outward, the mechanical stability of the extruded bead depends on the contact area and the thermal state of the polymer interface.

1.1 The Rule and Overhang Mechanics

The classic rule dictates that any surface inclined at an angle (relative to the horizontal plane) requires support. This is governed by the percentage of lateral overlap between successive perimeters:

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Engineer, author of The Big Book of 3D Printing and additive manufacturing expert