Light Painting Robot

To answer questions on the subject of light painting and the tools I use I have created a beginners guide to light painting here…
https://www.instructables.com/id/Light-Painting-a-Beginners-Guide/
Ever wanted to create cool light painting images like this one above (a collaberation between me and Stephen elliott)??? me too however i can never seem to get my orbs to be even and round! (I am of course assuming you know what light painting is if not here’s a quick wiki on the subject. https://en.wikipedia.org/wiki/Light_painting and here’s a quick google image search on the subject).
So I decided to apply some of my technical skill to create a Robot to draw the orbs for me. this is intended to be used along side other light painting tools and my example images are created with the robot as it stands now.
My goal was to make the design as simple and as cheap as possible. The parts chosen for the project are easily obtainable via ebay and amazon.”

Link