A little over a year ago, I made this little gem based on the software downloaded at the site below.
It took about 2 days to build and the software took about 5 hours to figure out where goes where.
It takes about a hour to wire it up the first time.
I used a laser pointer instead of an air gun... Now add in this instead...
Someone could lose an eye that way without proper eye protection.
Yes it works. Surprisingly well.
Caveat, you need good quality servos not the junk ones. Something used on model airplanes.
You also need a very good camera with minimum distortion. First attempt using a cheap webcam resulted in target being painted only accurately in the center of the screen and the farther from the center it became less accurate.
CAD files to follow. You can laser this from plywood at a sign shop.
If a better image recognition software was used, it would work even better.
All total cost, bout 2-300 dollars plus a laptop.
Now you see why you should learn Arduino and CNC.
The same $30 board that powers the above also powers this below