The university that boasts the world’s largest 3D printer developed one even bigger. A printer unveiled Tuesday at the University of Maine is four times larger than the current one and is capable of printing ever mightier objects. That includes scaling up its bio-based 3D-printed home technology to eventually demonstrate how printed neighborhoods can offer affordable housing. The thermoplastic polymer printer was dubbed the “Factory of the Future 1.0.” It can print objects 96 feet long by 32 feet wide by 18 feet high. And it has a voracious appetite, consuming as much as 500 pounds of raw material per hour.