3D Printable Gradient Lattice Design for Multi-Stiffness Robotic Fingers

3D Printable Gradient Lattice Design for Multi-Stiffness Robotic Fingers

Abstract— Human fingers achieve exceptional dexterity and adaptability by combining structures with varying stiffness levels, from soft tissues (low) to tendons and cartilage (medium) to bones (high). This paper explores developing a robotic finger with similar multi-stiffness characteristics. Specifically, we propose using a lattice configuration, parameterized by voxel size and unit cell geometry, to optimize and achieve finetuned stiffness properties with high granularity. A significant advantage of this approach is the feasibility of 3D printing the designs in a single process, eliminating the need for manual assembly of elements with differing stiffness. Based on this method, we present a novel, human-like finger, and a soft gripper. We integrate the latter with a rigid manipulator and demonstrate the effectiveness in pick and place tasks.

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Full Research Paper: [2501.03763] 3D Printable Gradient Lattice Design for Multi-Stiffness Robotic Fingers
All Credits Go To: Siebe J. Schouten, Tomas Steenman, Rens File, Merlijn Den Hartog, Aimee Sakes, Cosimo Della Santina, Kirsten Lussenburg, Ebrahim Shahabi

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