Check out my new Cartoid latch

check out my new cartoid latch. this mechanism locks the ring and pinky finger in either the extended, retracted, or in the open, unlocked configuration. this mechanism sets up the grip patterns. lmk what you think, thanks for watching!

[@RoguePlank]

Now you can sip tea like a gentleman

[@rooma2444]

Hahahaha God bless 🙂

[@johno9507]

Lol that was my first thought too. 😂

[@sirLJson]

To seem extra posh the pinky needs to extend while sipping

[@Maxim.Teleguz]

As long as he ain’t spiffin like a Brit

[@Soullessinfidel.]

he can finally throw up gang signs

[@Skybaby79]

"That costs extra"

[@isaacgraff8288]

I am impressed with how quick and smooth the swap from one hand to the other was.

[@felixmarriott]

remember, switching to your secondary hand is always faster than reloading

[@JessYoutubeAccount]

thanks lmao​@@felixmarriott

[@egeoeris]

The snappyness of it was jawdropping, as always. Kudos Ian the design's getting more compact every iteration what an engineering marvel to behold!

[@jc6087]

Necessity is the mother of invention. I've never met you but I have maximum respect for you, you're an inspiration.

[@mechanicalmind496]

perfect for a motorcycle, or anything with handlebars. i have a habit of keeping 2-3 fingers on the bars and using 1-2 fingers to actuate the brake or clutch. etc. keep innovating!

[@definitelynotpewdiepie]

I'd love a closeup of the mechanism, so I can appreciate it more fully. But any Ian Davis video is a good video. Glad development is proceeding well.

[@tHaH4x0r]

Looks like a great feature. I use such a 'tripod grip' quite often, although I think almost always with ring and pinky extended. Only possible issue I can think of, is that you might inadvertently engage the mechanism when brushing over a table, as generally the hand has a lot of contact on the edge when sitting at a table.

[@shuckLedurkins]

I tune in like once every three or four months you are a legend man, this mechanical logic is so beautiful and I’m so holy you share this stuff

[@NGabunchanumbers]

I find it funny that you ask us for our opinion of your hand. It looks cool! Thats all I can say. You'd be the judge of how practical it is

[@NetGhoul666]

The way you put it on is pretty badass. Pretty cool new tech too, does it have the lock-under-load feature as well?

[@missingpartsclub]

Yes! These fingers are the same as what's on the device that I am currently wearing.

[@savathunthejudge914]

Prosethesis manufacturers need to offer this guy a contract. His mechanics would add speed to modern bionics

[@crow_man4672]

it still gets better, impressive work!

[@meatman2203]

Amazing! I can’t help but imagine all the help technology like this is going to provide to those in need.

[@KjeldSchmidt]

Absolutely lovely videos. Thanks for sharing with us.

[@firelesswireless9734]

These are so cool. Do you wear them in your everyday life? Or are they just a fun project for you?

[@missingpartsclub]

The one that I was wearing in the beginning of the video is my daily driver. I wear it all day every day.

[@Zaximillian]

You using the term "daily driver" for a hand made me smile. It really is an elegant tool, isn't it? This makes me rethink my own living hands and how complex they are.

[@jamesbartle9617]

Good work. If I ever lost part of my hand I'm definitely going to hire you!!!

[@CynexAuto]

Make the switches and levers operable by moving the hand over a small hook feature attached to a regular trousers belt. That way, you can switch the modes of the prosthetic by a gesture similar to wiping your hand clean of dirt on your pants and your other hand would be free.

[@petersnayde4873]

Dear Ian! This is an amazing project!

[@evanbarnes9984]

Are you going to Open Sauce this year? I would love to see this work of art in person. My product design co-workers and I all love your work!

[@missingpartsclub]

I am! Right now I'm planning on being there with pcbway. We're still working on the details of the trip. But yes.

[@evanbarnes9984]

@@missingpartsclub awesome!

[@alix6xgorg839]

You should truly write a book! about your journey and craft

[@paulstewart4077]

So inspirational... you are a true genius. You should be working for some top secret cybernetic company.

[@davidgutting4317]

Wow, putting that on has come a long way, so many improvements. What’s next? Being able to lock 1,2,& 3 fingers or are you going to offer more splay to the thumb? Preset grip settings for the handles on the mill & lathe? Fore finger curl for flicking on switches? There are so many different options to explore, looking forward to seeing what you come up with next.

[@petevenuti7355]

You're amazing! I _still_ haven't built myself a leg yet and I got two working hands!! ..

[@marcopederzoli4939]

I am still more impressed by this hand than by Boston Dynamics'Atlas (even the last one)

[@fashvr9961]

It’s awesome. I feel like it’s potential wasted not placing this switch in the side of the thumb, so you can switch modes using only one hand.

[@missingpartsclub]

So I know that I didn't explain the drive for the cartoid in this video, but it'll be similar to how I was doing grip patterns with the 158 and 159. From 0, negative splay will engage or disengage the lock, while positive back to zero will splay the fingers.

[@fashvr9961]

@@missingpartsclub lol I don’t understand half of the things you said but I trust you know what you are doing💪🔥

[@martylawson1638]

@@fashvr9961 bend the wrist right to splay the fingers, bend the wrist left to switch grips like a clicky pen. You can see it in his older videos. It's really slick system that makes maximum use of his wrist to operate the hand prosthetic.

[@rustyshackleford1345]

@@missingpartsclub This just answered my biggest question about the new hand! It looked like it was designed to change pattern via splay, but I wasn't 100% sure. Amazing work, by the way! I still show my boss your new designs when they come out. He's actually a little unhappy, because I'm looking into starting a CNC course later in the year.

[@EqualVent]

I came across an account with a woman with full hand amp on both sides and her prosthetic was a shoulder sling with claws, where pushing the arm out opened the claw. I was wondering if it would make any sense to adapt what you have so far, in the future, to a prosthesis like that. No idea how a thumb would be implemented, but pushing the arm to open the hand seems like it could potentially be more functional than claws

[@thumb-ugly7518]

Spectacular. I'd love to see you design landing gear for some unusual biomimicry drone. I bet it'd be amazing.

[@_Blank___Space_]

that's cool as heck. handy feature indeed.

[@alainterieur5628]

My man just reloaded his prosthetic like its the most normal thing to do! 😂

[@bloviatingbeluga8553]

great! I love the short update!

[@Al-Storm]

Dude, you are amazing.

[@danielnieckoski9025]

Awesome4000! YOU my man are really someone to look up to.

[@desolatefix]

this is so cool and very ingenuitive

[@Dlweta57]

Wow... had no idea wot a cartioid latch is... Thought it was some sorta gun mech. Amazing engineering

[@alexanderkonczal3908]

definitely going to be useful. do you have any desire to add the same functionality to the middle finger?

[@0hellow797]

Is there any history of personally machined prosthetics? It would be super interesting to see how others have tackled similar problems over time. Yours is quite a piece haha! ❤

[@bwtrickster]

pretty nice

[@Fyr365]

Very innovative design! Though I always wondered something, it's about the size of the prosthetic, is it on purpose that it's proportions are above the organic hand or is it a design/manufacturing limitation? Looking forward to hear from you!

[@aaronklein3480]

can you also lock it in a middle position in order to for example really grip something heavy? like you did with the lock under load but as a simpler design

[@michaelbernoff5701]

If you adapt the lock and add a spring would you be able to adjust it to lock onto different sized objects like how vice grip pliers have the ability to lock and hold constant tension would you then be able to hold a tripod or a hammer without needing to keep tension on your muscles/wrist?

[@eddievanbasten1751]

Another great idea, well done. What about toggling the latch with a method that involves banging the side of hand against something, eg your leg, a table etc. ? Look forward to your next video. 👍🏻🏴󠁧󠁢󠁷󠁬󠁳󠁿

[@svetlicam]

That is really impressive, can you make it from titanium so that whole mechanism is sort of smaller as hand bones and you could potentially put some fake skin upon it. And even possibly put some tactile sensors in finger tips attached to your skin on the hand as feedback response, it could be useful i guess.

[@missingpartsclub]

Titanium, while cool, wouldn't get you there. The minimum wall thickness for sls printing is 1.5mm (.060") the parts are already sized to that restriction. So you couldn't lose any finger width. Also, the increased cost to have the fingers in titanium over aluminum is significant. $1800 for parts to build 1 set of fingers in titanium, vs $700 for enough parts to build 2 sets of fingers in AlMgSi. Also, post processing, drill, tap, ream, and fitting the fingers would be much more difficult in titanium. Work hardening and heat effected zone on the pin holes and more so the tapped holes would prove problematic at best. The metacarple bases have holes that are threaded 4-40 and 2-56.

[@oliva74]

Amazing absolutely amazing

[@HankW]

Another impressive feature! I feel like on one of your prior iterations you were able to lock just the pinky to support glasses while drinking, did that end up being useful? Would you be able to lock them in the same way here?

[@xDNemo]

beautiful

[@young-salt]

I think its great but wouldnt you rather have it be close enough to engage using the thumb on the same hand instead of using your other hand? Could you do this by adding a sort of trigger bar running under the joints and protruding from the index knuckle where it meets the hand?

[@young-salt]

Maybe angled a midway up between the first and second knuckle or maybe slightly behind the knuckle so its out of the way and hard to accidentally engage

[@jonathanorellana3924]

Really great job

[@aquariumcontrarian4075]

Goddamn real life Tony Stark. Love it

[@outcastcwd]

Amazingly cool!!!!😎👍

[@calebm.r.8367]

bro when you showed that it could be locked in either position i was amazed

[@augustinep6193]

Good. Thanks.

[@abderrahimaourir]

Now that baseball throw will go to Mars before Elon flying banana, congrats Ian

[@pkplith]

That’s so cool great idea

[@purestress2597]

Now we need someone to make another johnny 5 or Chappie style movie to make Ian a quintrillionaire from doing practical effects

[@Catladybug]

Amazing

[@tetros2064]

very good

[@Arkantrol]

I wonder, does the carthoid lock allow for a variable locking position? So that you could lock the pinky and ring finger to conform to the grip of something while still allowing for free movement of the forefinger and middle finger? If so, I feel this opens up an even wider range of specialized applications possible for this particular prosthesis, which is already a very impressive feat of mechanical engineering on it's own! Excellent work as always, your videos are a true inspiration.

[@missingpartsclub]

no this setup is either open or closed. i'm using this feature as a base for other grip patterns. the fingers are set up on wiffle trees. that allows for free motion of each finger. so say you want the "glass grip" you build that from all fingers unlocked and close the fingers with the bottom of the glass at the ring finger. the pinky will automatically completely close and the rest will conform to the glass.

[@Arkantrol]

@@missingpartsclub ah, I see, so all but the pinky finger will be able to conform to objects and the carthoid lock allows them to lock into place confirming to whatever object they're gripping around, while the pinky finger is locked into the fully closed position (which I assume can aid in holding the bottom of a glass or other object to keep it from falling through) If my comprehension is correct, that's actually really clever engineering, and answers the question I had about how well it could conform and lock onto objects without needing to overcomplicate things with a bulkier design for variably adjustable locking mechanisms. Forgive me if I sound ignorant of engineering, alot of this is definitely well past my knowledge, however as someone who's always had an interest and fascination with how things are engineered, it is very cool to see how you've created such versatile and intuitive designs while using purely mechanical constructs, rather than relying on electronics that can be finicky or require recharging to operate. Keep up the great work as always, your work is amazing.

[@Zero-jx2hf]

AMAZING !

[@technic_squirrel]

i am so glad he is getting the attention and praise he deserves, 6 fingers 6 digit subs

[@Avyr]

Yay, pinky promises!

[@silaswiebe7980]

Can the hand wear a glove?

[@jaimdiojtar]

you are the living iron man!

[@rokaq5163]

The design and care put onto this hand never fails to shock me. Great idea, Ian! Wondering if the latch could be engaged without the need of your other hand, maybe using your thumb to flip a switch on the side or the back of the ring finger?

[@missingpartsclub]

Oh it was never planned to be actuated by the off hand, I just haven't figured everything out yet, but wanted to show the feature. It has always been planned to be driven by the motion opposite of splay. Splay is lateral motion from zero, positive. Cart latch would be lateral motion from zero, negative. I'll show it in detail in an upcoming video once I get it dialed in.

[@ArtistNotFound123]

That is gonna add a lot of utility to grabbing stuff

[@chrisphobia]

Could you use it for grip? holding a drumstick for example, (asking for a friend) (-:

[@missingpartsclub]

you could, but all of the motion would come from the elbow, instead of the wrist. you would have to experiment with a non traditional grip, either that or look into a purpose built device for the application.

[@Stranger_Box1]

are you planning on adding something to be able to lock every finger individually?

[@missingpartsclub]

No, if I'm actually going to market the device as a kit, it needs to be simple and reliable. When I had full-fledged grip pattern selection with the 158/159 designs, the part count was way too high, along with being just too complex. The selector would also significantly increase the cost of the kit. The rp lock will set the hand up for most of the standard grips without adding a pile of cost or complexity.

[@AsyncMusic]

blunt smoking feature!!!! happy 4/20

[@mightandbelightnr2290]

Really Cool 😮

[@WindySilver]

That's super cool! 8D

[@thisguy4112]

Groovy!

[@Slim08151]

If anyone ever is able to build a full on Iron Man suit with all the intricate mechanisms it would be this guy - one handed

[@SoorajSVofficial]

Hi bro.. great Engineering..

[@Bob-v8h]

Can you adopt me. I’m an adult fully grown man living in Zambia. But you’ve inspired me like a dad.

[@Alowey1K]

Bro, I keep thinking you should use counterweight on your other arm or you'll fuck up your spine...

[@j.rumbleseed]

Dude!

[@melodywave3]

chicken nugget mode

[@frank8193]

Philadelphia

[@NoOnesIdea]

Cyberpunk 2024

[@zachkorinis3935]

I don't know if it's hard to do but if people can kickstart games and junk why not some funds for R&D for mechanical prosthetics . Just sayin

[@missingpartsclub]

So I looked into kickstarter to raise funds for 2 10 person trials to make sure that the kit was going to be viable. Being that it is 1.) a regulated durable medical device. And 2.) A "trial", the campaign violates their conditions of service.

[@HaloDude557]

Regulation is gonna ruin your fun

[@popolo3243]

I need this sell me

[@Jack_Wolfe]

You need more inhuman features, because dam, added functionality to your hand seems like a good compensation for loosing your fingers.

[@Paronak]

Great feature. You can still find ways to improve your hand, have a good one Ian

[@GPOLICE]

Swag

[@GENERIC-RICE]

Electrical prosthetics look like a joke compared to the sturdiness of this

[@rooma2444]

B i o w e a p o n - Jeremy Bowden. An australian first novel you might be interested in. Grain of salt. Thankyou. Godbless 🙂 . .

[@miltonso1393]

Are you selling your invention? I need one for my son. He lost his right hand due to an accident. Thank you sir. God bless

[@crazyfootballmax]

lan, Hi, I admire you, I want a fantastic hand like yours bro 🙏🦾

[@rooma2444]

Absolute admiration. Well said. Thanks God bless 🙂🙂🙂

[@maximusmerciful6911]

PLEASE FRIEND🙏🙏🙏