Mechatronic Finger Structure with Pressure-Sensitive Conductive Layer

In this paper a unified approach of a mechatronic hand enriched with a pressure sensitive layer is analyzed. New developments of advanced applications regarding the Additive Manufacturing (AM) have been investigated and implemented. The analyze starts with a finger physical implementation, using 3-D printing technology. Digital Light Processing (DLP) is the 3-D printing selected process for finger structure manufacture. Fused Deposition Modeling (FDM) is another additive process used for outer protective layer and for its mold manufacture. A pressure-sensitive layer of Velostat is inserted between the outer protective layer and the finger structure. The paper presents a simple and efficient prototype of a finger, using a cheap and sufficient accurate solution based on new materials. The finger manufacturing process begins with the design of three-dimensional model for the mold without any supplementary equipment and classic technologies. Starting from a finger mechanical structure with its three phalanges, it is developed by adding a pressure sensitive layer of Velostat, towards a future desired artificial skin. Its electrical properties recommend it as a first layer that covers the printed finger structure. Another outer protective layer is also added. This finger structure will be integrated in a designed hand system.