Of course all of this work is pointless until I can get those little quadcopter motors. I'll start printing this out in the mean time, and once those motors come I'll be launching stickers across my basement. Fun times.
Oh, I put these models in Cura. It looks like ~= 40 hours to print everything.
I've had a few people ask me how this thing will work. First, a picture:
Yeah, holy crap, OpenSCAD does colors.
So, in this image, the yellow parts are 3D printed. The light blue is a 9g servo, the purple parts are brushless outrunners designed for quadcopters, and the dark blue parts are grippy feeder things that are printed out of ninjaflex and attached to the outrunners.
The servo, and it's accompanying grippy feeder are set slightly forward of the outrunners. This servo will grab a sticker from the magazine and feed it, with the help of a semi-circular ramp, to the outrunners. From there, the motors - spinning at a very high RPM - will launch the sticker out of the barrel.
So it's pretty much a baseball pitching machine that you'd find in a batting cage.
I'm noticing a severe lack of coolness when I hand out hackaday stickers at events. I need a gun. A gun that shoots stickers at people.
The basic idea is something like one of those Nerf gun disk shooters that use a small DC motor to shoot foam discs. It's somewhat loud - thus cool - and they can shoot pretty far. I'll go with something like that.
Ammo will be 1" round stickers from stickermule. They need to be round for obvious reasons, and we're already using stickermule for hackaday stickers. Here's what they'll look like:
That'll only be 1" in diameter. Small. very small, but that's what you get when you need a ton of cheap ammo.
Files in the github, although right now that's just a test jig for the magazine. Three lines of openscad.
Oh, I'll be using a 2300KV brushless motor to shoot the stickers out and a 2 cell LiPo to power it. That's 17,000 RPM. Holy crap.