The extra we examine [Josh Pieper]’s quadruped, the mjbots quad A0, the extra blown away we’re by his 12 months of progress on the design. Every a part of the robotic deserves its personal article: from the closely modified brushless motors (with customized planetary gears) to the customized motor driver designed only for this undertaking.
[Josh], realized early on that the off-the-shelf elements like an ODrive simply weren’t going to chop it for his utility. So he designed his personal board, took it by 4 revisions, and even did thermal and cycle testing on it. He ended up with the compact moteus board. It may well pump out 400 Watts of peak energy whereas its 3Mbit management protocol leaves loads of bandwidth for actual time dynamic management.
The motors and gearboxes are additionally spectacular. It took thorough experimenting and taking inspiration from different initiatives earlier than he arrived at a 8108 quad copter motor modified and upgraded so closely its personal mom wouldn’t acknowledge it. That is all packed right into a leg unit with three levels of freedom that places even the fanciest servo based mostly quadruped to disgrace.
Lastly it’s all packed right into a neat four-legged robotic body with batteries and a Pi. You may get a video abstract of the robotic right here or after the break, and we suggest studying his weblog for some extra photographs and particulars.