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Here's next week's video for Patrons. This one goes out publicly on Tuesday 21st.

Pretty happy with how this is going so far, lots of wiring to do next to actually get it powered up.

Files

Previews only

openDog V3 - PREVIEW VERSION

I've previously built several robot dogs which used a variety of servos and brushless motors. The most agile robot dogs are the ones with back-drivable low-ratio reducers which allows the motor to be back-driven so we get some natural spring in the legs - which can be controlled on the fly with software. So it's time for openDog V3 - this version uses my Cycloidal Drives which I've developed over the last few months. I will eventually publish the CAD and code as open source when it works. 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 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.

Comments

Michael Bigby

I enjoy watching your 3D printed structural design. There’s a lot to learn there. You do a lot of using simpler shapes then screwing them together rather than making one complex/hard to print piece. I suspect this is second nature to someone from a conventional manufacturing background, but as a hobby 3D printing guy I find myself saying “why didn’t I think of that?”

Andrew .

So much work - super excited to see it running! Noticed the legs aren’t offset so the feet are right under the abduction axis, like in V2 - what made you decide to forgo that element?

Anonymous

Looks fantastic, can't wait to see him walking! Hoping this one is the one I build ;-P

XRobots

I've not designed much other than for 3d printing, but I always try to split the parts up to make easy flat bottoms.

XRobots

Yes, the axis are much closer this time so that would have meant massive bends I the legs and the feet really close together. I'll just fix it in the kinematics this time like openDog v1

Anonymous

How do you make a rotatable joint in Fusion 360? In the video, the openDog CAD model has adjustable, but I can't figure out how to replicate them. Is that a feature you need a license for?

XRobots

It should be a feature in all versions. Make each part a separate component, then use 'as-built' joint from the assembly menu.

Neil Devonshire

I've been trying to catch up with your projects as I've been away recently and busy with home projects, very impressed by all the progress you are making. Looking forward to this one running around and doing backflips? 🤔

Anonymous

Loving it, can't wait to see it in motion. Maybee the nylon bushings have to cut in half since they rotate in opposite directions.

XRobots

I thought about this, but looking at it closely I'm not sure both discs are in contact with the same bushings at the same time. I'm pretty sure you could still use bushings as a budget option, it just seems to run better with bearings (which didn't cost that much anyway).

Scott Cress

Think you're going to do a new line of merch for the new oDog?

Scott Cress

James, I'm not sure if you've seen it, this video that was just made public has been infested with response bots. Almost every other comment has nearly 6 bot responses.

XRobots

Thanks, I've reported the comments and 'hidden the user' from the channel which should wipe them all out. Looks like the same two accounts.

A. Bleys Ingram

I use Fusion360 create 32mm scale sci-fi minis for TTRPGs. Whenever open source goes live I would like to use your new O-dog as the design seed for a quadrupedal "Riding Beast".

Anonymous

I have a feeling that is close to $1000 just in bearings :D. Nice work James.

XRobots

It depends where you buy them, it was no where near that from Aliexpress.