Progress Update on 3d Printed Prosthetic Hand
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- Опубліковано 29 вер 2024
- Here's a little bit of an update on my 3d printed prosthetic hand project, with parts supplied by JLCPCB.
The biggest takeaway is 3D Printing is not the same as Machining. the tolerances and fit just aren't the same. If you look at 3d printed parts dimensionally, the same as you would a rough cast, you'll be ok. but if you're thinking that the dimensions are going to be spot on, eh you'll be doing some sizing and rework.
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Times are tough for everyone out there, But if you have the means, I'd appreciate your support and put it to good use. Please support me on Patreon at: / iandavis
I also have an Amazon link, and here it is! It helps me out a little if you click on this link and then checkout with whatever is in your cart.
Amazon link for all the stuff I used for this project.
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Alumilite plat 25 silicone.
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Perfect Cast Alginate.
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Perfect Cast Plaster.
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Temptations cat treats.
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Instagram at:
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Love seeing the progress on this. Truly a revolutionary piece of prosthesis that could be beneficial for people in similar situations. Amazing engineering Mr. Davis
I've always felt this hand looks so... unnatural, but I think that's because my focus is zeroed in on the hand due to my interest in its engineering. This is the first time I watched and caught myself realizing how natural it looks as you gesture. I have a new appreciation for how amazing it is. The handoff @1:10 is so fluid, and it looks as though your proprioception has completely integrated with the hand.
The sound is also great! I love the clicking emphasis given to words
This last iteration on the development of your prosthetic hand is really really promising. I am glad to be in the list of your "patreons", congratulations!
Thank you for supporting me on this project! I can honestly say it would be a tougher go if I didn't have the support of my patreons. UA-cam doesn't pay as well as it used to. I make way more money running the machine shop. But, I do way more for humanity with the videos. It's a tough balance.
@@missingpartsclub your achievements are truly remarkable. I guess support and appreciation won't pay the bills, but they are sincere.
For printers, the mono M5 has a resolution of 19μm, though resin shrinking is a thing if you want to get the best tolerances, you'll have to print a part with good enough tolerance, and then measure it and scale by the ratio, depending on the resin that's 1-7%.
Or do as you did and print it with 0 tolerances, and post process it.
Another option is to do undersize and shim or use a washer - spring washer - washer assembly, if you're doing a kit that's probably the best way to do it as there's no messing with filing.
You can get 1-8 thou (0.025-0.2mm) shims for pennies, and if you want to do a production line, you can get rolls of shim metal for very cheap, which you can then cut to shape with a
Glad you're doing well.
ive got no clue how people could dislike your content
Awesome progress
Commenting for the algorithm!
This type of thing will save so many people. It needs endless funding.
Philadelphia
This kinda reminds me of call of duty warfare
Advanced?
I LOVE how inventive you handle your own prosthetic creation!
I think you do great work! With the ongoing war in Ukraine I can´t help but wonder if/how/when your work will help the people crippeled by war.
Have you ever considered working with prosthetics and/or insurance companies regarding R&D?
It will absolutely help. Ukrainians are a crafty bunch.
Ian has previously touched on the subject of working with prosthetics companies etc, and while he would be willing to, the companies are not really interested in pursuing this sort of stuff.
Production values seem to be going up. ☹️
I remember when this man had less than 1000 subscribers and was trying to figure this stuff out… You have truly come a long way, Ian. We are proud of You and Your inventions. I personally always believed in You and was sure that something great would be accomplished on this channel, and You did not disappoint. Throughout the years I was just silently watching and rooting for You. Way to go, man. Godspeed to You and Your project!
I think i preferred it before the new room imo
Same, he has just a few hundred when I subbed. I just love the engineering as I at this point in time still have all my parts in my hands. Love this mans work
There’s so many of us that have been watching Ian for years, not a lot of channels get that kind of retention.
I really feel like you're pushing the boundary of analog prosthetics, it's incredible to watch. Also CAT TAX!
This is amazing
this guy should have a mechanical hand thumbs up emoji
Awesome progress! I've had great success with 3D printing if I loosen up all the fits. Having the fingers a little loose and rattling may not work as well but will let you use parts right off the printer. (Also improves dirt tolerance)
Also don't underestimate how quickly a sharp set of files can remove material. Notched some tubes for a project recently and the files were only a little slower than a mill and made it easier to dial in the fit.
Love the new background dude. This channel rules.
The radiused edges of the printed steel parts is a nice feature, definitely a more polished design. And likely, you need to be bit. 🤪
fantastic update. Not a surprise on the tolerances, would definitely need to address that in the design files for a reliable printed assembly. Would be much looser than machined, but for one-offs it might be good enough considering the cost
You haven't tried laser laser cut parts, have you? Maybe you'd find the accuracy you need there while keeping cost low
i have, early on, i made fingers by laminating acrylic parts that i cut on my 100watt co2. they worked, but they weren't super durable
#509-✅👍
Moving from prototype to production is a huge leap. It's super cool that you've dived into it fully and are open to taking new routes when certain options aren't working. That's the road to success! :D
It is great getting to watch your progress with all these different design iterations. These hands you design are fantastic no-electronics engineering design and they look awesome.
Such a cool hand. Wishing you luck on your progress
Hecking awesome, Mr. Davis! Keep it up!
Cool to see your work becoming a buyable product! Amazing and inspiring...
Do I understand anything he’s saying? No. But am I still gonna watch all of his videos because it’s honestly super incredible what he’s doing? Yes 🥰
They look amazing.
A kit would be excellent especially for developing countries.
To think your developments will be incorporated in future prosthesis and how you are creating progress is simply amazing for the viewer and for future users.
Looks great. I think ideally youd want to eliminate post processing for the end consumer, even if it means settling for a sloppier fit. I think many/most people would be discouraged or not have the skill and experience to do it well (and thus ending up with a sloppy tolerance anyway). My first few filing jobs weren't fantastic thats for sure, and i have the dexterity of two full hands which a prospective consumer wont.
Maybe switch process? Jlc and the likes offer cnc milling, injection molding, sheetmetal work and the like as well. It might even be cheaper than metal printing, i hear its quite expensive. Not as much freedom of form and design, but it might be a compromise worth making.
3D-printing is a technology of the 80ies but the older generations were either too ignorant or too lazy to use it at that time.
Today younger generations recycle plastic waste with 3D-printers. That makes me very proud.
Human species will survive.
Could you make a rewind of the progress and improvements of your protheses. That would be nice :D
So, if all this turns out great after testing. Will it be possible to order a set of parts and assemble it yourself? Because I don't have the necessary tools to make it myself. And can I ask you to really test in all conditions because I am engaged in agriculture and forestry (driving and repairing a tractor and working with a chainsaw). I'm missing 4 fingers just like you, only on my right hand. I am 23 years old and although I do everything without any problems as before I got used to it, I still have some obstacles
I love how natural your gestures are with your prosthetic. Amazing work!
have you ever considered making upgrades to your fingers that a fleshy finger couldn't have? i was thinking something like a 1 inch scale marking on the index finger to measure things quickly or even a 1/4 inch hex sock with a magnet in one of the finger tips (along with bits stored inside the palm) to be an Inspector Gadget style light duty driver set. you would also have a swiss army knife or even a leatherman built into one of the fingers (one of the smaller keychain leathermans).
Thanks for the update. Hopefully as the 3d printer tech improves the kits can be shipped with little to no post processing. That is obviously a longer term thing though.
It's good to reiterate that the "near net" 3d printer processes are exactly that. Near the shape you wanted but due to having to compensate for uneven shrinkage and other things always a tiny bit off.
I don't know a lot about engineering but the way you show how everything works from start to finish in your videos makes them really enjoyable to me. I've subscribed to you for a while now since when you only had about a thousand followers and seeing how your hand has developed over time is neat and exciting. It's so cool now how you are making your creations more accessible to people who might need it. also can you make a video with more of your cat next time please he's really cute.
(Please excuse my grammar if it's bad! I have autism)
be careful m8. don't let them change your vision
neat
The real trick is in designing the parts to be error tolerant, maybe designing them to be 30 thou oversize (if the variations you're seeing hold true) and then using shim washers to pack them out as needed. An alternative would be to supply accurately machined bushings that press into the parts, if the parts are supplied with slightly undersize holes, then reamed to a tight fit on the bushings. just throwing ideas out there!
What really warms my heart is how Ian makes it a point to figure out what needs to happen if OTHER people wanna have their own mechanical hands. What an awesome guy.
Wish I had something fun to say but just commenting to help out lol always exciting to see the progress being made with this and all your other prosthetics
you’re the best dude! love seeing updates on everything you’re working on, and can’t wait to see what you will accomplish with more time and resources. all the best
goddamn the amount of progress since day 1 is so GOOD
Nice! looking forward to seeing more!
As always, I love seeing what you're doing in getting better prosthetics available for less than an arm and a leg (ha). Looking forward to seeing what more is in store, whether it be this project or the next :)
Nice new background!
you've really been on the helium today
Your studio is looking great
Awesome
He’s gonna become iron man
Adorable cat
Cool stuff
Gooby doo lol
Were those parts FDM or SLA?
Mfj for the pa-12 nylon, and slm for the 316l stainless.
22 thou is more than half a millimeter, right? That's a helluva long way off, and 12 thou is better than a quarter of a millimeter of variance on a single (small) part. That's pretty shocking, I'd say, I had no idea the process was that sloppy. What were the tolerances you specified, and is it even possible to get better tolerances than you got with 3d printing? I'd be interested to see the difference in price between getting a 3d printed part and then getting it fixed, and its equivalent thrown through a CNC machining on demand service.
Its all good stuff, though. Keep at it!
Yes, .022" is a little over .5 mm. All I can say is printing is not machining, with these printing services you don't get to specify a tolerance it''s "as printed" it you think of it as a rough cast that is going to need post processing on mating surfaces you'll be fine. But if you're thinking that it's per print, and perfect, you'll be disappointed. I'm plenty happy with the service and parts. But for someone else to put together this as a kit, they need to know that they might/probably will, need to involve a local machine shop to put this thing together successfully.
@@missingpartsclub Yeah, I understand that you're gonna get shrinkage, it's a sintering process after all, and that for any given part it's probably not entirely possible to predict the shrinkage and distortions that will occur. However, getting fairly significantly different results on two of what I am assuming are identical pieces is pretty worrying. Even handing stuff off to an engineering shop for cleanup is going to be expensive, as each piece will effectively be unique.
Im so excited for anything related prosthetics. Been fascinated by them my whole life. Your work is truly inspiring.
This partnership is soooo awesome, just the right fit for the project. :))
My cat also taste tests me.
Of all the members of the siamese mafia, he the scariest. Every so often He'll forget that he likes being pet. So when you're petting him it goes from aggressive head rubs and heavy breathing to all of a sudden bite!
This continues to be such a cool project, keep up the good work!
Neat man
I have two hands and still love watching this channel 😆
That hand looks natural, love the progress.