Grip Pattern Selector!

[@ww-pw6di]

I think the coolest thing with your hand is just how expressive it is when you're talking. Very cool

[@LordFrito]

Engineers are something else. This guy is awesome!

[@Vit-Pokorny]

You could say hes *built* different

[@Shmuzznik]

"a couple of hands ago" must be the best quote I've heard in a while XD. Wishing you whole health!!!

[@Matthew-lh3zy]

100% badass. Sounds like a quote from the future, but it's not. I wish you well and all the best hands

[@redonk1740]

This dude gives a whole new meaning to "I've been working on myself a lot lately"

[@ArThur_hara]

ohohohohohhooo :D nice one

[@tHaH4x0r]

Hey Ian, I work a lot with compliant mechanisms. In my experience TPU is pretty poor for these kinds of mechanisms. People tend to go for TPU first because of the low stiffness, but a low stiffness does not necessarily make for a good flexure. If you rank materials by their yieldstrength/youngsmodulus you get a decent idea of how well a material performs. Absolute stiffness is not an issue, as you can always scale this by adjusting the thickness (thickness affects driving stiffness by approximately ^3). If you are looking for 3D printed materials for flexural elements, PA12 Nylon (SLS) is by far the best material (assuming that the part isn't exhibited to a constant load, as PA12 is very much subject to creep). For FDM based materials, I have found ABS to work quite well if you have an enclosed printer. You just have to ensure that the layer lines go in the direction of the flexure. From my calculations PC should work even better than ABS and get closer to PA12, however I have read many people have trouble FDM printing PC (brittle, warping etc), so I have not attempted this yet.

[@egeoeris]

Great suggestion, I've had a simillar journey for making a 3d printed clock, TPU was just soft while Nylon let me consistently spring back pieces rather than breaking/deforming them after few flexures of PLA

[@ANGELM73350]

I haven't checked back on your project in a while, but the progression is crazy The way it went from Steampunk-ish, heavy movements with a lot of inertia/momentum (which was already incredibly interesting to start with) to something that looks so lightweight with fast response and stopping time is impressive I can't wait to see the next steps

[@BenjaminLovelady]

Super cool to incorporate a bistable compliant mechanism for the grip selection. I'm not quite sure what makes it better than your previous mechanism though

[@missingpartsclub]

The previous mechanism was horological marvel for sure, but to make more than 1, and moreover have someone else put it together is asking a lot. This version gives you 3 patterns (rp locked open, rp locked closed, and free) while it isn't the 7 that the original was capable of, I think the addition of 6 or so parts to the build is a more than fair tradeoff for the additional functionality.

[@dr.derekrobinson1920]

I need a grip selector for full auto 😩😩😩

[@Psi_Fan123]

NO HORNEY

[@beenis08]

Bro 😭

[@JBroMCMXCI]

🤨

[@mynameisnotlarry7149]

Your attitude is amazing. You're solving your own problems. Sir , I truly admire you.

[@kalaruch1974]

Man, you are pure genius, simple and straight.

[@therealfreadjoe5153]

Can’t wait for the springs to come in and keep up the good work man it’s coming along great

[@Isaksson9915]

I absolutely love your drive, motivation and dedication to your projects! Thank you for awsome content!

[@bwray5054]

Ian, Watching you with your enthusiasm, brilliance, and joy of problem solving makes my world a much better place. Thank You. I will find time to visit soon.

[@Taabituubi]

All of this makes me very aware what a intricate mechanism our hand really is. I've been looking and fiddling with my hand for solid 10 minutes.

[@brentmlacy]

Wow you sure are amazing with your designs. Very cool man.

[@SIB1963]

I think your project is awesome. As good as anything on TY.

[@procrastinationdomination645]

Been following this dude for awhile now. Crazy how far his designs have come since the start. Awesome video as always!

[@ninthdoctor7918]

Have you thought about making a brush attachment onto the fingers for your cats?

[@southernflatland]

Yes, but my name isn't Ian Davis

[@Wyattinous]

This is so funny, I was JUST telling my father about your badass bionic channel and here you are with a new video. I hope you've been doing well man ❤

[@killmimes]

I'm going to need those TPU reports!

[@mellowyell]

The tripod grip seems really useful and intuitive to have on the grip pattern selector. Super cool.

[@mhdz]

Can we just get a vid of you petting the cat on an infinite loop?

[@noyoudontgettoknow8586]

so are lubricants an option to increase the life span? because organic knuckles have synovial joint fluid in them. its just a thought and maybe you've already tested some?

[@glenturner1668]

Still love it. Have another thumb 👍

[@heatshield]

I’m calling it now. You’re on the cusp of seriously hitting “the algorithm” here. I give it two months.

[@facelessdrone]

He "hit the algorithm" three yrs ago when he got a video with 18 million views, so unfortunately I doubt it'll happen again anytime soon

[@missingpartsclub]

Yup, I peaked with my first cell phone video. It's all down hill from here. I am still yearning for a gold play button though.

[@heatshield]

@@missingpartsclubI think they want you to make that on your own, too.

[@andrewcavallo1877]

Question, does throwing something like a baseball work well with the prosthetic? I ask this because release time is a huge factor in the accuracy of a throw, and I was curious how your prosthetic could handle it, albeit maybe with a modification or two?

[@missingpartsclub]

kzbin.info/www/bejne/fJbJfYSQmZKSoaM Here's beer pong with an older design. It works fine, but there is a bit of practice getting the release angle just right.

[@handlemonium]

Awesome stuff! I sometimes participate in Pacific Spaceflight events & orbital garment testing days and something like your wrist-activated mechanism would really be handy for semi-articulated joints and possibly even passive exoskeletons with wearer-configurable ranges of motion!

[@Toesty5]

So cool, awesome to see your iterations! Thank you for the video!

[@_Alex_F]

I've been following your channel for years and it never gets old! It's always so exciting to see your progress and how you troubleshoot different issues to make the new iterations. Definitely one of my favorite channels on youtube. Stay awesome Ian! 🙌

[@anarchy8968]

would it be possible to put the lever on the other side so that you can use your thumb to toggle it rather than your right hand?

[@missingpartsclub]

The grip pattern selector won't be actuated by the opposing hand, it will change position with the opposite motion of the splay. 0- will lock the ring and pinky, 0+ will splay the fingers.

[@alexanderkonczal3908]

I know your channel and delivery are more focused on demonstrating the hand to people who are in the know, mechanically/engineering-wise, but have you ever considered doing an educational series on mechanical structures, going through some of the terminology like "gafne plate"? You're an excellent presenter, and I bet you could get a lot of views teaching us normies.

[@Masheeable]

100% understand you wanting to control the grip pattern with lateral movement +/- like your old daily, but that lever mechanism that has to be operated by a 2nd hand is SURELY a simpler option for marketing/fabricating out the design!?!?!?! At the very least it's a superior option in terms of simplicity.

[@stephenhudgins6457]

Awesome progress. Love to see it 🎉

[@jvden361]

hey ian when are you gonna make an entire arm prosthestic

[@desolatefix]

this is just amazing

[@SamSam-ih6nt]

Awesome

[@LaptopAccount-y1u]

That's so awesome

[@esk8jaimes]

Love hearing about your projects, you'd make a fantastic engineering teacher!

[@nNicok]

Is it possible to bring the lever in reach of your thumb?

[@HolmesHobbies]

Amazing progress! Do you think this could be adapted with actuators for people without wrists or robotics?

[@magonsar]

haha a couple hands ago. I follow your videos for a while now. I love your content and wish you the best.

[@southernflatland]

May I ask, what is the weight of your current prosthetic, and how does it compare to the weight of your previous versions?

[@missingpartsclub]

They all weight right around 2#

[@BackflipsBen]

Casual cyborg

[@Antheras]

Hi Ian, love your videos! It seems like your side angle camera is a lot higher quality than your front one. If you swap those around the video would look much better! Keep it up! :D

[@jimzen1577]

pistol grip nice work

[@BernardSandler]

I don’t suppose it would be possible to somehow crimp a bit of leather as hinge on those plastic parts you are machining. Weight is negligible and I can imagine the lifespan being pretty good. Although I’m sure that adds to the complexity of the kit build.

[@woodybob01]

I wonder if it's possible to have the grip pattern selected by the thumb on the same hand? Probably impractical, but I imagine it could feel better if the hand could fully control itself without interception required from the other hand. Of course, you're the expert here. I'm just throwing out a random idea just in case it's actually good. Love your videos

[@kimcosmos]

where is the middle finger selector? Essential for driving and dealing with bureaucrats

[@elbee2324]

The hand is cat approved! :-D

[@Fatvod]

What do you actually use the splay for in day to day?

[@angst_]

hopefully people who need it (and can afford it) can by your "Robot Arm Sculpture"!

[@goontheracoon]

Why not print shell moulds of every part and make them out of Forged carbon? 2x print time but at half the weight.

[@KamikazeWombat]

Cool stuff as always! is this project open source or something you're working on as a product to sell/license?

[@missingpartsclub]

It's going to be something that I sell a link to a shopping cart. You order the parts from that company, you get with a machine shop local to you to fit the parts and drill the holes. You send me your address, and I sell you a hardware kit. There's a lot that goes into setting up a device. It's more than what's going to fit into an instructables.

[@KamikazeWombat]

@@missingpartsclub Sounds like a good plan. I think a decade or 2 from now a large percentage of people with similar injuries will have badass hands like yours.

[@kneebreaker2708]

Hey can you please send me a blue print and material's use to built it

[@fast-yi9js]

:O The cat approves!

[@Truckboy383]

💯🔥

[@kamilguzik3870]

comment

[@jtubach]

I would love to see a small sensor that can detect the pressure from your hand and a small servo or actuator would flip the switch automatically! A little FPGA would be perfect at making it instantaneous, and since you've solved all the massive power consumption issues mechanically, you could probably run the whole thing off a small lipo being trickle-charged by a solar cell. Maybe try to do a colab with @JamesBruton @xrobotsuk @XRobotsUK