↑ Click to snap
I built an algorithm that generates bistable structures — they click satisfyingly between two stable positions, like a snap bracelet or a clicky button. No springs. No moving parts. Just TPU.
It works on TPU 90A. Now I need testers with different printers and filaments to push it further.
Free · Open algorithm · No signup required to download the test model
Reddit upvotes
Comments & DMs
Printers to test
"I got this first version to work with TPU 90A, but it was hard to get find the right settings. So I am curious to see if it also works with other TPUs / printers. Is anyone willing to test the first model and possibly follow-ups?"
EDIT: Wow!!! You're amazing! I got lots of DMs and will also contact the ones who commented 🎉
Two stable positions. A satisfying snap between them. No electronics, no springs.
The structure rests naturally in two positions — flat or popped. It stays put in each state without any force.
Push past the threshold and it snaps to the other state with a satisfying click. Like a snap bracelet or a light switch — but 3D printed.
Based on a SIGGRAPH paper, the geometry is mathematically computed. The goal: a website where anyone can generate their own shapes.
Based on peer-reviewed research
Computational design of bistable morphing structures — doi.org/10.1145/3450626.3459940 (SIGGRAPH 2021)
No experience required. Just a printer, some TPU, and curiosity.
Test model already available
The alpha test model (bistable bowl structure, TPU) is on MakerWorld — free to download right now.
Tell me your printer and filament — I'll send you the latest models to test and keep you updated as the algorithm improves.
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The end goal: a web app where anyone can generate their own bistable structure.
Algorithm working on TPU 90A
First bistable bowl structure printed successfully
Community testing across printer/filament combos
This is where you come in — helping map which settings work
Algorithm parameter testing
Sharing different parameter sets to test shape variations
Public generator website
Enter your parameters, download your custom bistable structure