Patching Physical Objects
summary
A system mounts an existing print in a modified MakerBot fitted with a mill, suction, rotating stage and depth camera, then computes a patch by comparing old and new models and computing print‑head collision volumes via the Minkowski sum. The mill removes outdated geometry and an extruder prints new geometry in place, saving between 82–96% of material and cutting waste up to 93% on demo objects. Works on stiff fused‑filament prints, struggles with flexible or multimaterial parts and with submillimeter scanner error, but printed patches bond by melt extrusion.
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chapters (9)
- 0:00Introduction to patching
- 1:08Why patching physical objects
- 3:35Sustainability concerns in 3D printing
- 4:38Current workflow flaws demonstrated
- 6:02Custom hardware for patching
- 8:55Algorithm behind patching system
- 11:43Future sustainability challenges
- 13:50Closing and acknowledgments
- 14:13Q&A session
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