CVT Robot Arm #2 (Patreon)

CVT Arm #2 - PREVIEW VERSION

Last time, I started a project to build a robot arm which only has one main drive motor, and uses a series of clutches to drive three separate axees. I’d built something like this before which controlled a differential-drive robot on two wheels. In that project I built two continuously-variable transmissions using a ball which rotates and binds on two wheels. One wheel is driven by the motor, and the other is the output wheel which touches the ground. As the ball rotates a different length circumference of the ball runs on each wheel which gives us either a reduction or enlargement in velocity. If the ball is rotated in the other direction, we can go into reverse, and there’s a hole in the ball on its very end - so there’s a dead-spot which means we can stop the output. This did however mean that the output wheel could free-wheel in this position. This time I’m driving worm gears with the output of the secondary wheel so that the axees can be locked in place when they aren’t being driven. I now have three outputs to drive three axees of the robot arm. One of these drives the main waist rotation which is made from a Lazy Susan bearing – and this makes the whole thing rotate in place including the motor. At the end of the last video, we left the other two worm gears driving nothing, so today we’re going to build most of the rest of the arm mechanics driven by these two outputs. You can support me on Patreon or buy my Merchandise: *************************** Patreon: https://www.patreon.com/xrobots Merchandise: https://teespring.com/stores/james-bruton *************************** 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 *************************** 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: Filament from: https://www.3dfuel.com/ Lulzbot 3D Printers: http://bit.ly/2Sj6nil Bearings from: https://simplybearings.co.uk/ 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.