Project i abondoned couple months ago, but decided to share sources if someone feels inspired :)
M3 and M8 norm parts
nema 17 motor mounts
standard 608 bearings
the arm part works pretty good, the base with rotation was never finished
Designed in SketchUp, I used http://simonbeard.github.io/sketchup-svg-outline-plugin/ to generate the lasercut files. Since I mostly ever updated them and lasered them piece by piece the provided pdfs maybe incomplete or old versions.
only used with a ramps electronics board to test it out (like a 3D printer)
if there are any questions I will answer in comments