OK, let's get started. I'm Dan Maloney, I'll be the moderator today. I want to welcome everyone to the Hack Chat today, especially our host, @Will Cogley, who does some really cool stuff with animatronics.
Will, can you tell us a little about your background and how you got into this?
Sure! I’m Will, and I make 3D printable animatronics designs and publish them open-source. I’ve had a lifelong fascination with robots, but also the human body and biology. My main long-running project is a biomimetic hand that I hope will have the same movement and functionality as a real human hand. I’d love to answer any questions!
Here's the hand Will is referring to:
Behold the wondrous complexity of the human hand. Twenty-seven bones working in concert with muscles, tendons, and ligaments extending up the forearm to produce a range of motions that gave us everything from stone tools to symphonies.
Read this on Hackaday
When do you decide between stepper driven and servo-driven solutions?
When do you think you will work on the hand again?
wow, very impressive re. the hand!
Most of my projects are done on a tight budget so I almost always use hobby servos. With my bionic hand I'm currently starting from scratch and trying to optimise each element, stepper motors are definitely something I'm considering atm!
I'm actually working on the hand right now (relatively speaking), I'm going to release a video about it hopefully next week
What is the biggest design challenge you face atm?
It's been a while since I watched the hand videos - remind me what technique was used to make the plastic pieces? They don't look 3D-printed.
I'm trying to make my projects as accessible as possible so I'm using an FDM printer to make all the mechanisms and parts. Most of the parts in my new bionic hand design are so small they're kind of pushing the limits of what I can print reasonably so I'd say thats the biggest challenge I'm having right now.
Can you see the hand being completed and if so what would be the next step after you have a fully functioning hand.
...and your preferred filament type? PLA? PETG? ABS?
Yeah on that hand I used acetone-smoothing to get the ABS looking nice and shiny, it was actually kind of a nightmare since all the parts started to sag because of their thinness so I had to switch to hand polishing so they didn't totally collapse!
Wow, they came out great! Almost look injection molded. Gotta say, the hand looks bad-ass!
or rather bad-palm
Yeah I think I'm going to have a good working prototype relatively soon, there will always be room for improvement I imagine, but I'd really like to work on some different control methods next. Originally I used a control glove, and now I'm considering motion detection. The main goal would be mind-control though haha!
Gotta hand it to him. they look great
I'm sure other body parts will follow ;-)
only if you walk backwards /ducks
Have you ever looked at the vr hand thingy to controll it? I meant more like after a goo hand prototype would you consider mocing upwards and maybe develop an arm?
I've used mostly PLA up until now, mostly because of my printer's limitations, but I've recently been using ABS and its proving to be much better for sliding surfaces
Well, I mean that brings up a good point. Doesn't some of what animatronics attempts to do bleed over into prosthetic...
Read more »