Bistable Compliant Mechanism

Index
0:16 Multiple Material Prints
0:34 Design Prototype Test Improvements
1:00 Bistable Compliant Mechanism
1:32 Failures at interfaces
2:30 Flexible single piece
3:50 STEP file export
4:10 Thangs Upload (Assembly)
4:52 Thangs Exploded Viewer
5:50 Final Part
6:08 satisfying SNAP!
This Part at Thangs: thangs.com/yepher
Other Designs:
° www.thingivers...
° github.com/yep...
° How the Broom-Holder was Designed • FrictionHanger
Check out the great content by Matthew over at Design, Prototype, Test
• Designing & Printing a...
The Paper I referenced in the video:
Chen, T., Mueller, J. & Shea, K. Integrated Design and Simulation of Tunable, Multi-State Structures Fabricated Monolithically with Multi-Material 3D Printing. Sci Rep 7, 45671 (2017). doi.org/10.103...
Learn More about Compliant Mechanisms
Veritasium - Why Machines That Bend Are Better
• Why Machines That Bend...
Compliant Mechanisms Research Group at Brigham Young University.
www.compliantm...
More BYU CMR Designs: www.thingivers...
BYU Professor Larry Howell literally wrote the book on Compliant Mechanisms: amzn.to/3cMxqxz
Von Mises Truss

[@WayneJohnsonZastil]

Superb work gotta love open source and thangs!

[@ConstantijnC]

very snapisfying mechanism

[@Gotblade]

Since the outer arms flex slightly could the pivot points be a simple rotational pivot instead of a flexible material for longevity?

[@yephwerks3889]

I think you are correct. I've had a few more iterations of this and have yet to have a very reliable mechanism with this configuration. I'm not quite ready to give up yet.

[@Gotblade]

@@yephwerks3889 plenty of potential in this though ☺

[@alexandredaros8682]

Nice design, could you show us how to make versions in thang (like the tool hanger file @4:43 )?

[@yephwerks3889]

Thank you. Do you mean how to upload a design to Thangs so it is an assembly?

[@alexandredaros8682]

@@yephwerks3889 , uploading assembly went fine... what i dont know how to do is make versions of a part/asm. For example, my assembly has some parts (v0.1) that I uploaded but latter I changed something in part1 (v0.2) and want to update thang project whitout uploading all the files again, something like a git commit. Isn't it what the "Version From 12521" in your Tool Hanger file mean?

[@yephwerks3889]

@@alexandredaros8682 Oh,. ok, now I see what you are asking. That is not a versioned file. According to the Thangs team, their next big release (~ 2 months out) will be an MVP for a public/private geometric revision control system. But... Here is a sneak peek: drive.google.com/file/d/1SdvWT_vyT-gSC5_pzx5FUioMLEKDiKZb/view If they actually get that working the way it looks like it will work I believe it will be a huge step forward for the opensource design. I am very eager to see it live.

[@alexandredaros8682]

@@yephwerks3889 wow, that is awesome... looking forward to that. Thanks !

[@kennykd97]

i came from desighn proto test channel

[@yephwerks3889]

I'm glad your here

[@kennykd97]

@@yephwerks3889 Thank you.

[@DaSmokeDaddy]

yepher, mind sharing your opinion pros/cons regarding Shapr3D? I have a CAD and modeling background but not with this particular software. Also, what Ipad are you using and/or what would you suggest (Apple 12.9"iPad Pro Wi‑Fi, 1TB)? I'm not an Apple user, so I'm clueless. I've read there is a Windows version but more than likely still buggy.

[@TheYephers]

I am probably due for an upgrade but currently I'm using a 9.7" iPad pro. I am not sure the best iPad for you but what you say could be a great choice. I tried a lot of different drawing apps and Shapr3D if for sure my favorite. For me the interaction with the app on the iPad is very natural. But the thing that I really love best is I am not stuck behind my computer and I can draw almost anywhere. The only complaint I've seen for Shapr3D is the price is a turn off for some.

[@DaSmokeDaddy]

@@TheYephers thanks for responding. I like the concept of being able to draw almost anywhere too. The price doesn't bother me but I don't want to be a beta tester Windows wise and am not a big fan of Apple.

[@yephwerks3889]

I've not tried the Windows version of Shapr3d and used the Mac version very little so not sure how good it is. But I can say the iPad version is quite good and I don't think you will feel like a beta tester for that app.

[@3dpyromaniac560]

Glad design prototype test gave you a shout-out, otherwise I never would've found you

[@yephwerks3889]

Welcome aboard!

[@tcratius1748]

Exciting and somewhat annoying from the perspective of a single nozzle user.

[@yephwerks3889]

Yes, I understand. My previous printers were single nozzle and finally pulled the trigger for multiple nozzles.

[@iceypino1086]

i keep getting recommended these videos, never really understood why but i dont care anymore ill just watch them

[@buddy1155]

KZbin algorithm 1.0 recommends videos a user might like. KZbin algorithm 2.0 keeps recommending videos until a user start liking them.

[@jackcoats4146]

There is a feature in cura that shold allow 'melding materials' to help make the hold together. I haven't used it but saw it on the release notes. That is the latest one I loaded.

[@TheYephers]

Wow, good to know

[@ZOMBIEHEADSHOTKILLER]

from my experience, PLA wont bond to TPU. PETG seams to bond to TPU pretty good. and PLA Bonds to HIPS pretty good. i havent found any other usefull combos yet.

[@yephwerks3889]

Thanks for the tip. I will try PETG/TPU combo

[@737Garrus]

0:26 Me as a Swede having seen this broom/mop holder for walls in Sweden hundreds of millions of times: Nothing new here. People in the U.S. figuring out 3D printing the same holder: Whoooaaaaa this is soo cooool!!!!

[@sizaint]

Cool of you to share files in this way.

[@yephwerks3889]

I am glad you like it. Just getting started so stay tuned

[@aytunch]

Great video. Keep more coming soon

[@yephwerks3889]

Thank you. In case you did not see it I just posted one for adding a cup holder to my Piper Archer II (PA8-181)

[@inquisica]

Thanks for sharing this. Curious how you're actually doing the multi-material print? Are you using pause commands in the GCode and swapping out filament mid-print? Or do you have a multi-material printer? (if so -- which one?)

[@yephwerks3889]

My printer has multiple extruders so I have the rigid material in one and the TPU in the other. I use an Ultimaker S5

[@GrueblersCount]

What is lacking with Mechanical Engineers today, is the knowledge of how to design mechanisms correctly. Did know that there's a mathematical formula that can be used for all mechanism designs? It's called Gruebler's Count. I found a way to make it practical for all 3D mechanisms. Here's the link if you are interested. kzbin.info/www/bejne/gXelaZqDn913hs0

[@igoaaronlu8142]

excuse me.im very interestin in which ipad app you use to design 3d model

[@yephwerks3889]

I am using Shar3D on the iPad www.shapr3d.com/