3D Model Reconstruction for Fused Deposition Modeling Cracking

The patent applies segmentation by dividing long printable lines into multiple shorter segments. Instead of printing a continuous long line in a single pass, the printing path is broken into discrete segments with small gaps between them. This allows each segment to cool and contract independently, preventing the bending and cracking that occurs when entire long lines are printed continuously, thus maintaining structural integrity while still achieving reasonable printing efficiency.

The patent applies self-service by designing the object's own geometry to prevent cracking without requiring external support structures. By segmenting the printable paths and optimizing the printing sequence, the object's structure itself prevents the bending and cracking that would otherwise require support lattices or rafts. This eliminates the need for additional support material that would need to be printed and then removed, significantly reducing material waste while maintaining structural integrity.

The patent applies local quality by selectively applying segmentation and path optimization only to critical areas where cracking is likely to occur, rather than printing the entire object solid. The hollow structure is maintained in non-critical areas to preserve printing speed and reduce material consumption, while localized path segmentation is applied to specific shells or walls that are prone to bending and cracking during printing. This approach maintains structural integrity in critical regions without sacrificing overall printing efficiency.