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Here's next week's video, early for Patrons.

I'm planning a V2 with linear actuators at some point.

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Previews only

Building a better Doc Ock Tentacle - PREVIEW VERSION

We’ve all seen Doctor Otto Octavius or Doc Ock, in the spiderman comics and movies. Dock Ock has four tentacles and four of his own limbs, so that makes nine in total, and that’s the same as an octopus. Lots of cosplayers have made Dock Ock cosplays, including Adam Savage, although mostly those tentacles are in fixed positions or supported with strings. So this time I’m going to try a different approach, using six actuators in each segment of the tentacle. You can support me on Patreon, join my Discord, or buy my Merchandise: *************************** Discord: https://discord.com/invite/fc6MedG7eW Patreon: https://www.patreon.com/xrobots Merchandise: https://teespring.com/stores/james-bruton *************************** Other socials: *************************** Instagram: https://www.instagram.com/xrobotsuk Twitter: https://twitter.com/xrobotsuk Facebook: https://www.facebook.com/xrobotsuk/ *************************** Affiliate links - I will get some money of you use them to sign up or buy something: *************************** 10% off at https://www.3dfuel.com/ - use code XROBOTS at the cart screen. Music for your YouTube videos: http://share.epidemicsound.com/xrobots *************************** 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

Comments

Neil Devonshire

Cool, I've wanted to make a set of these since I saw them, nice.

Dean Edis

Awesome build! Definitely looking forward to v2!

Pete Mertz

Ditto, very, very, very cool. Perfect for containing fusion in a magnetic field!

Kit

Weirdly enough after watching this, YT rec'd a video by Harrison Low (who is working on a juggling robot and is in need of some high performing linear actuators). Searching "Designing High-Performance Linear Actuators" should bring up the video. Uses a string/fishing-line style of drive to get speed up and weight down. I wonder if, in a full 6 seg tentacle, all drive motors could be moved off of the tentacle and kept at the non-moving base.

XRobots

A few people have sent that to me. I think it might work for some of the stages but the lower stages will have quite a lot of load on them, so maybe it starts with ball screws, then lead screws, then string actuators etc...

Kit

Very true - esp with bowden tubes buckling under high load. Not sure how I'd handle that short of just beefing things up. And tapering the stage sizes towards the end moves away from the Doc Ock look. Definitely looking forward to a future build!

Anonymous

This has got me thinking - until recently I raced performance sailing dinghies at the weekends. The control lines to shape sails and, literally, bend masts to shape have ludicrously high loads on them. There may be some learnings from that space for future applications. Time allowing I may look into that.