Full 3D printed hexapod robots with energy efficient joints

• Brodoline Ilya
• Viollet Stéphane
• Serres Julien

• Biomimetics
• Biorobotics
• Irreversible joints
• Cost-effective platforme
• Force sensing

Nowadays, servomotors are classically used as actuators for actuating small legged robots. Their advantages are numerous: simple to control, miniature size, and a large choice of various dynamic models, which permits to choose the best speed and torque tradeoff for robot joints. However, the main drawback of servomotors is their permanent energy consumption, due to the permanent effort required to keep joint angle constant, for example when the robot stays on the spot. In addition, the dramatic heating of the servo case and gears can break the robot. The goal of our project is to design a new energy efficient robot’s leg for full 3D printed hexapod robots, called Pohod15 and Pohod15J (Fig. 1). The principle of our new leg structure is based on an irreversible mechanism inside each joint (an actuated lead screw), which will drastically reduce the robot’s power consumption by half, compared to our previous one version, called AntBot. The design of this new leg is directly inspired by insect leg structure. As a fair return, it will provide an efficient robotic tool for biologists to test both ant-based pattern of locomotion and insect-based navigation across long range without servomotors limitations, therefore saving energy resource.