PlotBot - more details

So, the original inspiration for doing the plotterbot came from a blog post a while ago on (I think) embedded.com. Since then, I've been looking at plotterbot.com, and thinking about how we could base a plotterbot on the Raspberry Pi.

Just in case it's not clear, I'll expand on Elliot's description with a picture:

So we have two stepper motors which pull strings that are attached to a "gondola". The gondola holds the pen against the drawing surface. Because the drawing surface is vertical, the strings connecting the gondola are kept tight by means of a counterweight.

All very simple in theory. We'll see how it works in practice.