From hackaday, though I assume that a fair chunk of you read that already

[hackaday.com]

Mostly interesting because the platform has a nice built-in absolute positioning system, which various people have been talking about. Probably not so practical for a reprap... I'm anticipating a certain amount of innacuracy and speed problems when drawing short arcs. But for smaller cartesian bots this might be practical, you never know.

Hi Ru,

I am looking at doing something similar but using a swing arm with a normal linear pot providing active positioning information. Check out [forums.reprap.org] if you