If I make a reprap with a Single Arduino, will it be able to fill foam? Does it have only one extruder? I read somewhere that a "complete" rep rap - the Darwin - is the PIC model that has 2 heads. What does that mean??? Is one for foam and one for polylactic acid?
I don't want collisions between multiple heads (extruders). So I only want one. What I really want is a high-tech physical snap system so there are tool heads, like a variety of colored pencils that can be fetched and written with or extruded etc., and then put the old tool back and retrieve the new tool.
That way we could fill foam and switch tools to fill polylactic acid.
Or am I totally wrong with my assessment?