As part of a project for the local library, I selected the MeArm robotic arm, primarily because it appeared affordable and could be created via laser cut plywood.
I’m not so sure about the affordable part, as the parts will be about US$75 when purchased in quantity but it’s the lowest price robotic project I found that I felt could be handled by teens for the library summer camp.
5mm/sec (300mm/min) at 100% 4W laser resulted in a few cuts not getting all the way through, but easily sliced clear with a razor knife/box cutter. Four hours and three seconds elapsed time. My first real project and it came out as good as I had hoped.
The slight variation is caused by shadows from the garage lights, as the photo was taken without a flash. The plywood was purchased inexpensively from Joanne Fabrics retail store and is uniform surface both sides.