For this project I picked this mechanism as an example.
I started doing with a diameter of 5″ in order to get a bigger movement distance. So first prototyping in cardboard. I saw that I needed some guides to keep the movement edges in in order to have the horizontal movement I was looking for.
Resize it at least to half, to much friction and how to guide the moving parts were some of the feedback from class.
Once I had the right measures, I went to mill the part in delrin using the otherMill. Here I recommend to use the bitBreak mode so you can choose where to cut in your piece your files, either outside or inside the stroke.
I had the base built in a thick piece of wood, that i chopped from a table that was tossed it to the street close to school. Here is the final video.