The Compliant Mechanisms Research Group is a highly successful and innovative group at Brigham Young University in Provo, Utah. The group is known for their prolific publications on traditional compliant mechanisms, Lamina Emergent Mechanisms (LEMS), Microelectromechanical Systems (MEMS), and more recently origami. Not only are they on the forefront of these areas of research, they also hold numerous patents for products developed within the group, many of which have evolved into business ventures. The group is led by Dr. Larry Howell and Dr. Spencer Magleby. Partners include NASA's Jet Propulsion Laboratory (JPL), NASA's Marshall Space Flight Center, the National Science Foundation, and others.
TACPM is the worst acronym i have ever seen, but thank you for posting this video, i might use the design for a project i might work on at some point in the future
Two of these, one under another with a small space, look like would be great idea for "frictionless" spring for a mechanical keyboard switch. No need for guide housing, with little wiggle. Mechanical keyboard enthusiasts are always in pursue of the best key switch. i would love to see this as a metal spring!
Id be interested in making a machine to test the longevity of these switches for real application use. After 100, 1000, 10000 on / offs, lets see how it holds up? If you send me one, Ill build a rig for it and test it!
Depends entirely on the material printed, with my brown atomic pla @ 190c, only lasted around 20 switches. The linkages were not flexible enough and ended up snapping
I printed a couple of them in Onyx (Nylon + Carbon composite) using a Markforge Mark 2 printer. And I had my test prints fail at around 250 clicks I'm wondering if other people had better luck with durability using PLA
Currently there is an issue in joysticks for gaming controllers where the mechanism’s friction releases particles that jams the sensors (drift) and the lost material makes the joystick loose over time (needing a dead zone configuration). If this mechanism was small enough, instead of motors there were sensors and instead of the truster there would be the thumb pad the sensors might not be jammed by particles, the joystick might not get loose over time and it might reduce the number of parts drastically as there wouldn’t be a need for a spring to return the joystick to center and about six other parts. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-vQesgAtr2e4.html
Would something like this be useful in a vehicle? People don't really think about ratchets wearing down often, but I fell like if you were to connect a ratchet to a motor, it may need more frequent replacing that one might think.
Any idea which material would work well to compress air for a low pressure air pump, that needs to last years, for something along the lines of a furnace bellows (but not exposed to high temperature)?
was searching for 3d printed centrifugal brake and your design is awesome... will share some credits in video on my main channel if i build what i am planning to using this design ;) thanks
Hey, thats very nice. I wanted to know is it the variation of thickness along the extrusion curvature that can yield for any material's compliant mechanism tendency. And if so, how do you determine the optimal thickness and it's location ? is the location through the springs in your PRBMs(pseudo rigid body models)? Do you also think polar moment of inertia can help predict curvatures thickness ? Can you also tell me which filament you used to obtain this specific design ?
You can get kind of the same effect from a 3 x 5 card. Bring the two ends together, with one hand and then hold the rounded middle between your middle finger and thumb and then use your index finger to push and the middle a little bit. Then you can open and close by just squeezing with your middle finger and thumb. A very similar geometry. Thank you for submitting your 3D Compliant Mechanisms to Thingiverse.
Very interesting design...there's one tube on the lower end which is not straight through...it's cut and the middle part is shifted down...is this a mistake or intention ?
Developable Mechanisms, incredible. All the times id' felt that developments were an anachronism in design, , now they've found new life into that obscure discipline.
Take a lot of bendable plastic tubes in a pattern, put motors on suppose x and y axes and an engine on z axis. Boom you can rotate the engine in any direction.
What software is being used to model the kinematics of the origami mechanisms? Is it a standard CAD package or a program specifically made for these applications?
The software they are using to show and manipulate the 3D model is Solidworks. It's one of the most heavily used 3D CAD softwares in mechanical engineering. Solidworks does not currently have any special tools for designing compliant mechanicms in particular. In this video they are using an assembly of multiple parts to model how the equivalent single part would function
