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Support-free volume printing by multi-axis motion

Abstract : This paper presents a new method to fabricate 3D models on a robotic printing system equipped with multi-axis motion. Materials are accumulated inside the volume along curved tool-paths so that the need of supporting structures can be tremendously reduced - if not completely abandoned - on all models. Our strategy to tackle the challenge of tool-path planning for multi-axis 3D printing is to perform two successive decompositions, first volume-to-surfaces and then surfaces-to-curves. The volume-to-surfaces decomposition is achieved by optimizing a scalar field within the volume that represents the fabrication sequence. The field is constrained such that its iso-values represent curved layers that are supported from below, and present a convex surface affording for collision-free navigation of the printer head. After extracting all curved layers, the surfaces-to-curves decomposition covers them with tool-paths while taking into account constraints from the robotic printing system. Our method successfully generates tool-paths for 3D printing models with large overhangs and high-genus topology. We fabricated several challenging cases on our robotic platform to verify and demonstrate its capabilities.
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https://hal.inria.fr/hal-01887571
Contributor : Sylvain Lefebvre <>
Submitted on : Thursday, October 4, 2018 - 11:08:35 AM
Last modification on : Tuesday, June 1, 2021 - 2:34:10 PM

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Chengkai Dai, Charlie Wang, Chenming Wu, Sylvain Lefebvre, Guoxin Fang, et al.. Support-free volume printing by multi-axis motion. ACM Transactions on Graphics, Association for Computing Machinery, 2018, 37 (4), pp.1 - 14. ⟨10.1145/3197517.3201342⟩. ⟨hal-01887571⟩

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