3D Printed Wire Race Curved Guide and Bearing with Recirculating Balls - the build
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- Опубликовано: 20 май 2021
- This is a continuation of my experiments on what can be built using steel wire races and bearing balls to achieve a truly custom solution to a truly unique problem.
What it is: a curved guide with a matching sliding block. A bearing segment. An AT-AT ankle articulation. All these. But the real application/idea is a shoulder articulation for a 3d printed exoskeleton project by Andrea Piccino (follow him on nozzle_torino for a look at his awesome project)
The articulation must be able to withstand pretty big loads while retaining mobility so using any plastic bearing elements there guarantees early failure, hence my take on using a hybrid, plastic and metal approach.
The video recaps the early problem solving steps (building custom supports for highly precise and minute surfaces, making sure the wires snap firmly in place, getting nice smooth round wires) and presents new challenges (designing a balls loading block, achieving preload on multiple axes in a single action)
Enjoy!
Soundtrack: freemusicarchive.org/music/Ja... 
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Really liked how to managed to print the overhangs without typical supports. Nice.
Thank you, bud!!
That’s a fine build. You just gave me some ideas of cycling the ball bearings with printed housing🤩. Thanks for sharing ❤
exquisite! I especially love the loading tool you made to ;ut kit all together.
fascinating build, thanks for sharing
Brilliant! exactly what i was looking for.
Thank you!
That is totally ingenious! You could adapt that to a linear slide on a 3D printer or CNC .
Thanks! Absolutely, but you would be limited to the length achievable on your 3d printer and your straightness would also be quite limited
good work!
Very Cool .. Thank You for sharing .. Cheers :)
Very creative, need more ball bearings to reduce noise, and could have left out the 2 outside races. Good stuff
Nice engineering 👍
Thank you! :)
This is genius.
This is amazing and exactly what we are looking for. I am an senior me student and i am taking a course about mechatronics. We need to build a robot that makes turn around a fixed point. Which is exactly you have made. Do you mind sharing the sources files etc?
Nice design. Is that a custom support? Are two rear races necessary, could it be done with one? How tight is the bearing? Does it take much force to come off the rails because it is only be held on three sides? I also like the tool to aid assembly.
Thank you, Paul! Yes, that's a custom support for the only lip that needed it. Designed to leave a pristine surface. In my opinion one top race would be enough, but this design was a collaboration with Andrea and he kindly asked for two. The bearing, even as loose as you can see it in the end, is very rigid - so there's definitely room but no need for tightening further. I couldn't take it off the rails period. Stiff as frigg! The tool to aid assembly is a first iteration and I already have several ideas for improving it.
Just awesome!
I've designed and printed linear bearings and they worked but had to be fitted together due to the variation in tollerances every print has. And there even hundrets of a millimeter count a lot.
How much play does this bearing has?
I really admire your skills! Well done!
Thank you! For the linear bearings did you mean the bearings alone or the guide rails as well? If you meant the bearing blocks alone, then you might take into account adding a means of adjusting preload. Mine are by definition preloaded, so the play/slop-vs-smoothness ratio is always up for variation via preload. Less slop equals less efficiency too (more friction).
Very interesting. Can you like to a printables account etc. where we can keep an eye out for developments and release? Look forward to playing with this one day :)
👍👍👍
Unless it needs to hold a lot of weight, you should use was less balls and include a cage. It will be much smoother.
Hi Eros, I want to take your idea and make a steering rack for a mini 3d printed rc car im building. Im curious if there are any rules of thumb you can offer in designing a raceway similar to this. Also are you giving out a model of this, Looking at the sketches would help me get a similar quality to your design! Very impressive by the way, very practical and useful way to get motion with 3d printed parts
Hey, Michael, thank you so much! This is a rather bulky design, simply because of the size of the balls and wires - a smaller size could be used, but it would be more finicky to assemble. The most useful advice I could give out would be: prototype incrementally with a small segment and try various tolerances until you get the snappy fit you like. Only then start printing the real thing. Buzz me if you want me to get into more detail.
Hello! Thanks for awesome design. Can you share this stl? Thx
Hey, thanks! What application do you have in mind for this?
I am curious, what is the application for it?
It's in the video description: instagram.com/p/COsyNDPj-yv/
Guy is building his own Iron Man suit
yo make this into an open ended box wrench design
How do you mean?
Will you be sharing your design files?
I thought this is such an edge case that no one would be interested in re-building it. What application do you have in mind for it?
@@ErosNicolau Well for me I can see uses for Cosplay armors and the like. But also potential use in robotic systems for makers. Parts are harder to purchase bearings especially are either out of stock or really expensive. Something like this could really help those individuals. I also see it as a way to teach students new design techniques and options. I have FIRST Robotics team that I work with where I could see this type of setup being use in a turret for a shooter system or potentially a wrist for an arm they build. Lots of options really and I personally just find it fascinating to see and want to know more.
@@jdlake8129 Thanks for the detailed reply! I'll do my best to revisit the design files, to make sure everything's OK, and I'll buzz you. The thing about this is it's VERY parametric and a work in progress, so simply publishing the STEP file doesn't help much...
Hi! First of all, nice project and design!
My questions: the same design, in a straight line, could be a linear rail right? So, do you have it? And will you share the files?
Why share question: i searching for a printed linear rail for a low, low cost printer (totally diy, kids friendly). But my skills for design such "close tolerances" pieces it's not the there yet.
So, again, very nice design! And I will wait for your reply.
Hey, bud, thanks a lot!
Very nice observation and suggestion, I might try a linear version! So thanks for the project idea! And you can bet that once I've completed it I'm posting it!
About your potential use: this might work but the smoothness / rigidity will depend on the rail you're using. Going with round ones leaves the question "why not use regular LMUUs". Going with profiled guides already takes you to expensive places. What are you thinking about this?
P.S. So sorry for the late reply, your message got lost somehow...
@@ErosNicolau thanks for the answer! The use o printed linear rails is for 3d printers of really low budget costs, like a proof of concept, where the most of it could be really printed.
Nice video, the bass tone in the background music is *very* annoying though...
I see it stops at 00:45 so probably something in your videos...
ЭЭЭ.
Это даже не модель монорельсовой дороги на электромагнитах?
🤦🏻♂️