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CRE-004 Cryptic Pattern Leg Prosthesis - iDIG (Integrated Digital Design Laboratory), Department of Industrial Design ITS Indonesia

by crewolprint3d Jan 12, 2018
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Hello! Awesome work!

What body / foot size was taken into consideration for the design?

No, I still do not get any information of the requested.

Did you ever get and answer to your questions???

Hi, I want to know 4 things:

1.- Know if this prosthesis has been used and tested by people, since I do not know if it is plastic support the friction and weight of the movement and the part of the ankle.

2.- Know more details of the metal parts, the metal parts where I can buy them.

3.- There are two models, one that has 1 spring and the other that has 2 springs, the latter have the files? which is better?

4.- You have more real photos of the part where the spring and pivot go.

Did you ever find out any more details about the metal parts?

please download the file ... let's develop it together ...

also can you share with me the step files so i can customize to patients sizes.....i will really appreciate....my email....springbionics@gmail.com....

great job on this project....
i intend making this for amputees for free to restore their mobility.....
right here in Africa there are lots of amputees and the price of prostheses is so high they cannot afford it....now seing what you have done is so amazing and its going to bring hope and joy to them......
your permission is required

WOW Jacob5, that is wonderful to hear, that you are intending to help those who are less fortunate in Africa. I do not want to sound ignorant, but how come there are so many amputees there? Either way, if you can help only a small number of those in need, you will be doing a GREAT thing. Hopefully some day, we will all hear of the amazing work that you have done to help the people of Africa.
Thank you for caring!

selamat siang, teman saya perlu tahu apakah soket dapat dimodifikasi sebagai pasien, atau jika Anda dapat membantu kami untuk beberapa modifikasi?

Hi :)

I'm going to print this to test it on my patient . But I need to do some modifications on it depend on his length & size.

Could you please help us with a soldworks, .iges or x_t format ?

Thank you.

Hi can i use your picture for a project at school

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Kalau punya rencana ditambah sensor, motor, prosesor dll saya juga ingin riset di bidang itu.
Sudah saatnya ada protestic yang lebih nyaman

Musanto..salam kenal..terimakasih..silahkan lanjut utk diskusi via WA

Desain bagus..sukses selalu, salam dari Malang

Its a nice job but theres many things wich need to be changed that the prosthesic works well. Also the Descriptions for the BOM "Springs" "Bolts" etc. should be shared. I will do one by myself and share with you guys

Where can I find the one you have completed? I need help on finding the correct metal parts for the leg.

this is such an amazing job. I was wondering if you could share the iges/step files with me, please? My email is sam.nocelotl@gmail.com
Thanks in advance

Hi there!


I'm building this for someone who really need it, but I want to know if you can share with me the step/iges files to do some modifications, I will share the finished job with you too, can you help me with the files please?


Best regards from México.

Hi Hector

It's great to hear what we do can help many people. What application do you use now? In my opinion, almost all 3d modeling applications, can read the OBJ format. Suppose by installing Autodesk Netfabb. Please use the imported STL format command, then do the OBJ export format command. This step is an alternative while waiting for us to send the file in STEP / IGES format.

Best regards from Indonesia

Thank you, please send the step/iges files to my email, celishector117@hotmail.com, I will do modification for the knee, thank you in advance


this would be awesome. I am printing your design for my neighbour and i want to print it in TPU, but it is i little bit too big and i also want to remove the holes. Meshmixer didnt do a really good job there, so i hope you will share it with us :-).

Best wishes,

Luar biasa produk anak Surabaya, Indonesia!

terima kasih..dimanakah kotamu Minonabubu? salam dari Surabaya

I'm having some thoughts about organizing 3D Builders to come together and make as many of these as we can to help the less fortunate. The people who can't afford a "real" prosthetic leg. If anyone has any ideas or contacts that can help me with this I'd be grateful. What country or state would benefit most from this...? Who will take them? These are all questions I want to have answered before moving forward. I'd even like to take it one step further and supply the hardware. Set it up so people just send in the printed parts and the proper hardware can be added on. It's not realistic to ask people to obtain titanium hardware, their doing enough and that's good on them. I feel the 3D printing community can make a difference here. Any thoughts or if you'd like to get involved please add a comment. Thank you, James
P.S. I saw that a prosthetic leg starts at $5,000 and goes up up up from there. We can do some good, stand by for details. thank you

Look at Team Unlimbited (http://www.teamunlimbited.org) and Enabling the Future (http://enablingthefuture.org). These are both global volunteer networks addressing the very issue you are describing.

That's great, thanks very much for the information. If things go according to the plan would you care to participate?

Hello, do you have a protests for cats?.

crewolprint3d first i have to thank you for this really.
my lady is losing here right foot. she has charcot syndrome. if i spilled that right . she had surgery. but it not going good. and she knows it.
me lady seen this and liked it so i would like to give this a go for here.

some things i like to know if you do not mind. can this be edited so i can make this fit for here.
and she is losing right foot. i am guessing i can mirror. or does it matter.
i know this is a open source, but atm me lady is welling to try. she already feels like she's losing everything.
i just wont to give her some hope. even if its walking around the house with help.its a start.

i have a cr10. and i am skilled in maya and 3dmax. for over 15 years. but never measure items/props for real live prints. i only had cr10 for a month.

p.s sorry for my english. i am german and english grammar still working on it lol

I guess you already know this by now, but in germany the insurance will cover the costs of an electronic prothesis.

Die gesetzliche Krankenkasse ist verpflichtet eine Prothese, die dem neuesten Stand der Technik entspricht und dem Bedürfnis des Patienten gerecht wird (nur Aufenthalt innen, auch Aktivitäten im Freien, Sport etc), zu bezahlen. Diese wird auch individuell an den Patienten angepasst. Auch auf eine wasserfeste Prothese zum Schwimmen besteht Anspruch.

Als Aufmunterung also ein super Projekt, Angst davor nicht mehr gehen zu können muss es aber nicht geben, hier wird mit modernsten elektronischen Prothesen geholfen.

seems difficult to me to make this fit for foot amputee ,i have been working with amputees for 35 years ,and made thousands of prosthesis ,your lady will have to go trough a difficult time ,but 99.9 %of the people who loose a leg or foot walks again in a short period of time ,in your case i would go to a orthopedic shop and ask for information there are dozens of solutions for each patient and every amputee is differend in, my opinion i would say dont make it before you are very well informed ,because a bad prosthesis can do more harm than good ,also sorry for my english i am from Belgium ,kind regards to you and your lady , tell her al will be fine in a matter of time...

for anyone who has click likes, download and give suggestions .. this is the design of open source prosthesis .. let together we develop for better results ..

Thank you for the work you put into creating this and for uploading the model. I built one but I'm not clear on how the Dumper (part 11) is to fixed to the foot hinge (parts 8 & 9). Is it to be glued on? Also how were the aluminum hinges and clamps fabricated? Are they available commercially? I printed them in PLA but they seem like they need to be stronger.

This is great!
Could this be adapted to be used on a CR-10 3D printer?

Can Someone help me on how to connect part 12 and 13...? and what is the use of the slots part 12 and 13 have in the bottom for ?

I believe parts 12 and 13 can be connected with a long bolt and nut or with 2 screws. My guess is that the slot in the bottom is for a spring to hold the foot flat. The spring allows for the toe section (part 13) to dorsiflex a bit while walking. I'm not sure this joint is necessary and perhaps 12 and 13 can be modeled and printed as one piece.

great work, huge thanks for doing this thing, from méxico

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This is the single best use for 3D printing. You have made the world a better place ☺️

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hello, i am an Student and i like to know if i can print this to present it in my class?

please, you can use as per your requirement

wow this design looks really slick. Just awsome!

I was curious if you could let us know where you found the non printed items so we could purchase them. I'm remaking this item for DISPLAY purposes only for now. However I want it 100% to your design

all components other than printed parts, are easy to find in the store of tools and building materials around your place. that's what we think about when developing this prototype.

I can find the parts I was just curious how long the pipe needed to be for this particular model. I'm using it for display at my shop (credit to you) so I wanted to have the correct sizes.

I've tried the pipe with a length of 300 mm

Are the solidworks files available so people can adjust the dimensions ?

im sorry, i dont have .sldprt file, but maybe if you want, i can share the iges/step file.

Without the design files, this is nearly worthless for real patients. Is this an advertisement?

please..you can visit my instagram..crewolprint3d

Hello I am actually contemplating surprising a special person with this as a functional prosthetic. I was hoping I could get an email or some information I could use to contact you and bug u with so I could work on make this pretty function for someone and give u some good feedback for others. Please let me know

Very nice ... I like things what helps people or are in any way useful.
Sadly 80% of all stuff on this site (like on other sites too) is trash. But this prosthesis is great!

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This is probably the coolest thing i've seen on this site, and probably will be for the next 6 months. Great work!

Now all that need to be done is for someone to use a 3d scanner on the recipients stump for a perfect fit just a thought

That’s being done! Several of my contacts in the prosthetics world do that and I’m personally working on a scanner-printer hybrid design for making that process easier.

Antes mais nada parabéns pela atitude de colocar a prótese para download e aquisição dos usuários.. eu tenho interesse em ajudar o próximo e gostaria de fazer , doando as próteses e ajudando em acoes sociais e possível .. sem comercializar .. so ajudar mesmo

I am also a prosthetist and have been making prostheses for 30+ years. I love to 3D print items, just be careful of printing this for someone without taking the liability on yourself. I say that because the feet that are commercially printed are tested by the companies through at least 2 million cycles or steps to insure there is no failures of the feet. That may seem like a lot, but it is only about what a person walks in a year. Also the feet we buy from manufactures are rated for specific weight categories and their activities. So if you print this and give it to a person and in a month they fall when climbing steps and their hands are full or crossing a road and it snaps when they are in front of a car, this would be partially your responsibility. I have had components fail on my patients even with all of the testing done and it can be very devastating if they are doing an action that can cause problems if they fall and are not ready for it. The testing and the responsibility of making a foot is one of the reasons the foot itself can be expensive. There are over 200 types of feet now available for amputees in the USA. They range from firm feet to very flexible ones. Costs also range from $500 to over $100,000 for the foot alone depending on the foot. I know it seems like a lot, but think of now what goes into a prosthetic foot and what liabilities there are when you make one.

I think this is a great idea, but just use caution if and when you might make this for someone or for yourself.

Sounds like you’re threatened that people can print this themselves without paying a ridiculous 100k fee. This is a middle finger to the medical profession who demanded compensation before health care is given. It’s a free open source alternative when y’all want to jack up the price when the materials you use cost $2000 max!

I'm not threatened at all, in fact I'd like to see this work. However there are three important parts of a prothesis. The first part is the components themselves, which is what this is. The second part is aligning the foot to the residual limb, if this isn't done properly a $100,000 is worthless because an amputee cannot walk with it, similar to a good and bad alignment on car tires. Third is the fit of the socket on the amputee's limb, again if this hurts, the prosthesis is useless because of the pain ensued from a poor fitting will render it unable to wear and possibly worse cause ulcerations on the amputee's limb. Now if all of these items are successful then the prosthesis should be wearable. If this could be done with these parts then that's great. If these parts fail though when someone is walking on it and you printed these for that person and they hurt themselves, then how much money do you have for a lawsuit. This isn't from me, but the lawyers in the US and if you are outside the US, then you are much luckier. I often give legs away when insurance can't pay so while money is important it isn't what drives me. I do use 3-D scanning, 3-D printing, laser cutting and engraving, specialized fitting systems, silicone, elastomeric gel, computerization in feet, knees, elbows and hands. We are up to date on making sure HIPPA guidelines are followed and that we are a certified prosthetic and orthotic facility. So good luck with printing this for all the amputees Runningfox!

I’ve already gone up against the ATF and congress and won when I helped cofound DEFDIST. I’ve sued Wells Fargo twice and won. Papa John’s, Home Depot, McDonald’s, AOL and won. I’ve helped introduce the world to 3D printing guns. I’ve already downloaded the foot. I cannot be sued due to the fact I’m giving the files away for free. With a link who developed it and produced it. In thus I cannot be sued by a cripple who printed it themselves. Just like people who print the guns I’ve uploaded to the internet in 2008 I cannot be sued by any weapons manufacturer.

In 2008 I also helped cofound 405th.com / 501st.com and other websites. Microsoft couldn’t touch me because halo pepakura armor is cosplay and it’s free in thus I’ve made no money even though I’ve ripped the files off their video games and reconstructed the .OBJ files. Lucas Arts couldn’t touch me due to same reasons.

Any idiot can google the formula for measurements for a limb and scale it up or down and use simple geometry to make it fit. Everything you own will fail and break eventually. R&D your own shit so you don’t have to rely on health care leaches like you who over price a limb that cost $600 to make.

Wow Runningfox, you seem like quite an insecure person who doesn't value anything but their own opinion. Look at all those "things" you've "accomplished" but don't pertain to what is actually being talked about. It s sad that you felt it's acceptable to use the term cripple... You demonstrate a lack of emotional intelligence.

"Cripples" really Runningfox,,,,,

Make one, have an amputee wear it and actually help someone vs being an unknown jerk on the internet. Then let's see what you can really do to help people.

thats a good point, i have a question what if a print the foot and make a mold and then casting in another material a rough one?

It depends on if you are molding the remaining foot or the residual limb (amputated limb). It is very hard to cast or scan either one and make a reverse duplicate of it. It is actually easy to scan the residual limb, but to make a socket that goes on the limb and is comfortable is very hard. There are soft spots on the limb and boney areas, and if the socket (what goes over the limb) is not proper it can cause ulcerations and infections that cause a lot of problems. If it is fitting well though, it can be something that allows them to walk without anyone knowing.

“Very hard to scan” B u l l s h I t ! A NextEngine 3D scanner or cheaper handheld variants can scan 1 million points per sq inch on a person and replicate a exact .stl file or a.obj file. You’re purposely giving misinformation

A scan of the stump at rest isn’t very useful once they start exerting themself. The musculature starts to swell, and depending on the rerouted blood vessels in the stump, there could be situational swelling, inflammation, or irritation caused by sweat or a bad fit. I have it on my mates word that in can be excruciating if badly fit. It can also get a bit smelly. Materials matter

Not at all, scan with a mini iPad and a structure scanner. Now combine it and see what you get, I'm sure it's pretty easy for you.

Wow, this is a great observation. I believe to mitigate the dangers some serious testing needs to be done to see for weak parts and combine that with CNC made metal parts or some other strong material like CF/Kevlar composites or nylon in its critical points. But how would you test its durability? Do you know how they test this 2 million cycles under what conditions (force applied, type of movement)?? It would be great if this could be replicated to test the model. I personally im planning on doing it since im also working with 3D printed prosthetics. Do you know of any international standard to which the design can be subjected to?

I think that testing with overweight and millions of cycles would reveal mechanical weak parts or places where wear resistan materials are needed in combination of stress resistant materials would make this work a great ground breaking base to start with 3D printed and CNC made lower limb prosthetics which are actually useful and affordable.

I have to laugh not very strong? I helped design the 3D printed gun. The hardest part to design was the lower receiver and I , Cody Wilson, and others did it. ABS can withstand the force of firing 1,000 rounds and still go for more! This we have to CNC it is the doctors threatened by this open domain leg. They have open source hands. I don’t see people screaming oh noes about that. I see hundreds of news agencies thanking open source engineers. You need to cut your fear mongering bullshit. If you want to do the research and add it to the open source file then do so but don’t stand in the way of progress.

—-co founder DEFDIST

As you were interested, here's a couple of International standards which would help with validating the robustness of such a (commercial) device. If this is for home-made use, you bear the personal risk.

I have seen the testing machines, but do not know how to make them. The idea would be to put the pylon "pipe" into a clamp and then have it push down on heel and forefoot forces, rolling from heel to toe, the repeat. These are very robust machines and what I've seen have been made by the companies that make the feet. I believe there is also an international standard that has to be met. Most foot manufacturers not only sell their feet here in the US, but also internationally, which have certain standards. I am familiar with the College Park foot, the Truestep. This was started by an inventor who saw the movie Terminator and decided to create a foot for people to use with that design. He had gone through many different designs, using stainless steel, composites and a large varied about of materials. Since 1986 they have been making feet for amputees.

Here is the website for College Park, in fact there is a picture of one of the testing machines on the site.

Another thing is that when a person walks, they put between 2-4 times their body weight in forces through their leg. So if it just is for a 100b person the prosthesis needs to be able to take 400 lbs of normal forces going through it, just to be safe.

this is so very awesome! this is the type of things we wanted to see being made to improve quality of life for people, great job. my only suggestion is maybe to print some parts from semi flexible rubber type filament. it sounds soft but it really is not. it will bend a bit but after a few layers thick that almost stops and this stuff can never break ever! i tried to snap a strand just 1 by hand it is impossible for me. so many together well you get the idea. it will work great for this. hope you see for yourself as it should add some comfort aswell. thanks so much for sharing!!

Thank you for your sharing.

Amazing work! 3D printing just got a lot more exciting :)

How durable is this leg? What's the weight/height limit?

I assume you don't recommend printing with PLA?

Please post the Fusion 360 files of the joint cover and front and rear cover files. This will allow easy modification of the covers to fit individuals prosthesis. Thanks and great work.

hi incredible work !! for scaling what are your suggestions? thanks.

That's an awesome work! Can you recommend me somewhere I can learn more about this? I would like to be able to make one for someone who can't afford it, and I have no clue about how should I print it, as in scaling it or something.
Thank you.


Sign up autodesk academy for free and they have an interesting introduction course.

Thank you very much! I didn't know they had free courses.

Thank you for sharing. How did you print the covers? Best wishes.

Wow, thanks for sharing i'm surre this will be usable for some people!

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What material/materials did you use? PLA? ABS? Very impressive design. I have been printing hands for Enable but leg/feet offer up a whole new way of helping!

thank you,
i use ABS for some of them, and PLA, but its really good if you can print them with HIPS.

IMHO ABS/PETG/HIPS/Nylon shall be used since such plastic is hit resistant. PLA is brittle for this purpose (for expositions only).

LOL you have no clue what you’re talking about do you? Brittle? The lower receiver of the AR-15 was made out of ABS and PLA. It fired 100 rounds without fail. 1000 rounds without fail. 100,000 rounds without fail. So your boast about plastic being fragile is frankly bullshit. BA (Boeing) just 3D printed a entire plane out of plastic. Simenons the German airplane manufacturing company used plastic to make a prototype jet engine out of plastic that can reach Mach 5

I'm sure PLA can be used to make jet engine for exposures. But as I know some details of jet engine do not survive if they are made from anything else than monocrystal of some metal. Probably some parts of the jet engine can be 3D printed with metal , if they have sophisticated structure that does not allow casting from metal.

The biggest models to print are at least 250mm. So no much home printers are able to print that models in their original size. Probably standard printers of 180-200mm z-height can print de-scaled models for childs. But there are printers with 300+mm z-height of the volume, that can be used for printing.

yes, almost home printers cant print this object, except split them into 2 section and then combine them with abs juice, just in case you want to print this.
talk about the socket, i think socket form or size is personal.

Will the socket be strong enough? Even if it's printed solid, it's a very unique set of forces. Would be nice if there was an easy way to measure for the interior.

I remixed the joint cover to fit standard (most common) 30mm diameter prosthetic pylons. This will allow printing the front and rear cover only and attaching to a prosthetic. https://www.thingiverse.com/thing:2763861

Prosthetic Cover Connector
by vtcgeek

yea thank you. should be usefull.
in my place, i just can found alumunium pipe with 31.75mm diameter.
and for the spring, some patient really need the hard one.

Poosthetics cost anywhere from 5-50K and need to replaced every 4-5 year (faster if you are a kid). Thank you for doing this!

really? 5k for a prosthetic leg?

We just hired a guy with a prosthetic leg. When I asked about the cost, he said his was $18,000. Blew me away....

OMG thats too much money (for me at least)

I'm currently undertaking my MSc in Biomedical Engineering, a fellow coursemate works with industry testing prosthetic legs in excess of $43000. They're quite something, they include sensors and processors that move the foot automatically while walking to imitate normal gait (somewhat).

provided you cut cut the aluminum pipe yourself, even getting the other metal parts 3d printed, this wouldn't cost more than 500-600 bucks. Way cheaper than what a normal prosthetic would cost.. good job.

Nice work, I hope you get some donations and support.

Nice Design. I am a Prosthetist and own a company making "traditional prosthetic legs" Other than the socket design which has to be custom molded/printed for each individual patients, this is a pretty nice setup. Worth trying to experiment with.

yes HalDrall, some of patient have unique stump, and so does the socket.
thank you to try this :)

A file with dimensions and tolerances could be useful.

this have been tested in real pacients?? and if you do have what material you used??

I'am a Biomedical engineer and planing to begin a NGO would be a problem if i use this desing obvisly giving you the credit of the desing

yes, this is already tested in real patients, and have some nice suggestions direct from the patient.

Would you consider uploading actual photos of the printed object being used by a patient?

here the photo, i blur the patient's face due the privacy.

Nicely done, this makes me happy!

Nice job!

I would like to ask you something.

My father use a prosthesis to hold his foot straight. This prosthesis is inside the shoe and it cuts the bood flows. I would like to design for him a new one to use outside the shoe. Could you help me?

I think you should do a plaster mold first from the outside of the shoe with the foot.
once you got the cast you could mold a part that you could 3d scan.
you can use a normal digital camera and use wed programs that would give you a 3d image file
them work from there.
hope this helps

very cool I'm also redesigning my Leg Prosthesis but mine is the most difficult because its a full socket down from the knee because its just my foot that's gone but I'm just waiting for my printer so i can start experimenting. i have no printer so saving up for a cheap one anet a8

try a tronxy 802MA its only about £150 and would help you experiment
Kind regards

have the anet for a few months now and after some finetuning and upgrading some small parts is a Great printer
(ist already good now its just better ;)

The anet is a pretty good one. I have it, and it exceeded my expectations! Have fun!