James Bruton gave this title to his newest video as a good-natured jab at Alan Pan’s undertaking to “deliver the legs again to snakes”. In Pan’s video, he constructed robotic exoskeleton to permit snakes to stroll on motorized legs. However as Bruton famous in his video intro, these legs didn’t look very snakelike. So Bruton created his personal robotic that walked on extra snake-like limbs.
Every of this robotic’s six limbs has three levels of freedom (DoF), all of that are pushed by a motor. However not like most robotic limb designs, they use “tilted swivel joint mechanisms.” This mouthful of a time period implies that every joint rotates in a airplane offset at an angle to the earlier joint. Though this association is just not appropriate for a lot of functions, the kinematics are fascinating and the ensuing movement does resemble the twisting of a snake’s physique because it slithers.
Highly effective servo motors rotate the joints and an Arduino Mega 2560 board controls them. The servo doesn’t enable steady rotation, however this isn’t essential for this robotic’s gait. Energy comes from a pastime LiPo battery, and Bruton pilots the robotic utilizing the customized common distant that seems in most of his movies. All of the leg segments have been 3D printed and connected to a body created from a number of items of aluminum extrusion.
Though it’s straightforward for the Arduino to manage the place of every servo motor, Bruton needed to do quite a lot of work to determine methods to coordinate their motion. He discovered the fundamentals by trial and error, however complicated management would require trigonometry and the applying of inverse kinematics. Bruton determined to not hassle with them since he had already achieved his objective of constructing robotic legs that seemed like they belonged to a snake.