Rostock Printer


From the 3dprinter.net:

It's called the Rostock and it's a creation of Johann Rocholl. Rather than the standard x-y-z system, it uses three arms attached on their own independently-driven, vertical axis. Each stepper motor has a belt that loops from top to bottom, moving an arm along two precision rods. And that scheme is what makes it fast as hell. Just watch this demonstration of it going to town.