My kids and I are working on an automatic ping-pong ball thrower. We’ve come to the following design, which uses two rollers (paint rolls) being turned by separate motors. The laser-cut frame is supposed to also hold a servo which lifts the ball into the rolls, possibly controlled by sound-driven electronics. We’ll see where it ends up.Â The files for lasercutting your own are here and here. They are licensed under Creative Commons Share Alike.
Laser cut ping pong ball thrower by Lars Kristian Roland is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
I’ve used InkScape to draw them.