openDog V2 Part 3 - Mechanical Assembly

It's time to build the ultimate robot dog using the R&D from my previous builds. This dog will use Quasi-Direct Drive from large diameter low KV brushless motors so that we can make the joints dynamically compliant using the same method as my previous back-drivable test dogs which worked well. I'll then add the some of the dynamics I tested in the miniDog series. In the previous parts of the series I built a test leg to see how much load I could put on top of it. This time I'm discussing the design optimisations and building the majority of the mechanical construction for the robot. I'm using carbon fibre tubes as well as 3D printing. You can support me on Patreon or buy my Merchandise: *************************** Patreon: https://www.patreon.com/xrobots *************************** Affiliate links - I will get some money of you use them to sign up or buy something: *************************** Matterhackers 3D printing supplies: http://www.matterhackers.com?aff=7500 Music for your YouTube videos: http://share.epidemicsound.com/xrobots Amazon US: https://www.amazon.com/?tag=xrobotsuk-20 Amazon UK: https://www.amazon.co.uk/?tag=xrobotsuk-21 Amazon FR France: https://www.amazon.fr/?tag=xrobotsuk0c-21 Amazon DE Germany: https://www.amazon.de/?tag=xrobotsuk02-21 Amazon ES Spain: https://www.amazon.es/?tag=xrobotsuk07-21 Amazon IT Italy: https://www.amazon.it/?tag=xrobotsuk08-21 *************************** Other socials: *************************** Instagram: https://www.instagram.com/xrobotsuk Facebook: https://www.facebook.com/xrobotsuk/ Twitter: https://twitter.com/xrobotsuk *************************** CAD and Code for my projects: https://github.com/XRobots Huge thanks to my Patrons, without whom my standard of living would drastically decline. Like, inside out-Farm Foods bag decline. Plus a very special shoutout to Lulzbot, Inc who keep me in LulzBot 3D printers and support me via Patreon. HARDWARE/SOFTWARE Below you can also find a lot of the typical tools, equipment and supplies used in my projects: Lulzbot 3D Printers: http://bit.ly/2Sj6nil Lincoln Electric Welder: https://bit.ly/2Rqhqos CNC Router: https://bit.ly/2QdsNjt Ryobi Tools: http://bit.ly/2RhArcD Axminster Micro Lathe: http://bit.ly/2Sj6eeN 3D Printer Filament: http://bit.ly/2PdcdUu Soldering Iron: http://bit.ly/2DrNWDR Vectric CNC Software: http://bit.ly/2zxpZqv Why not join my community, who are mostly made up of actual geniuses. There’s a Facebook group and everything: https://www.facebook.com/groups/287089964833488/ XROBOTS Former toy designer, current YouTube maker and general robotics, electrical and mechanical engineer, I’m a fan of doing it yourself and innovation by trial and error. My channel is where I share some of my useful and not-so-useful inventions, designs and maker advice. Iron Man is my go-to cosplay, and 3D printing can solve most issues - broken bolts, missing parts, world hunger, you name it. XRobots is the community around my content where you can get in touch, share tips and advice, and more build FAQs, schematics and designs are also available.