http://www.newsweek.com/now-you-can-3-d-print-your-guns-metal-223860
One of the fondest dreams of modern-day backyard tinkerers is on the verge of coming true. Engineers at Michigan Technological University (MTU) have announced publication of their open-source plans for an affordable, homemade 3-D printer designed to fabricate solid-steel products from common welding wire. The prototype, about a foot tall and weighing a little less than 10 pounds, was assembled from less than $1,500 worth of parts and materials – and the engineers who made it are now working on a more advanced version of the machine to extract all manner of useful new hardware from recycled cans.
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