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3D printers can create some amazingly complicated objects, but most printers build volume is limited by the size of the machine itself. Freeform 3D printers are currently being developed and now researchers in Barcelona have combined mobile robots with 3D printing to construct objects far larger than the printer/robot itself.

3D printers can create some amazingly complicated objects, but most printers build volume is limited by the size of the machine itself. Freeform 3D printers are currently being developed and now researchers in Barcelona have combined mobile robots with 3D printing to construct objects far larger than the printer/robot itself.

How 3D printers work

AT FIRST, printing was known as stereolithography, a process invented in 1986 by Chuck Hull of Systems. Variations of this process are still used. It begins,...