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Inexpensive 3-D printers aimed at consumers are toys, not the factories of the future.
Will we one day find a desktop factory in every American home? That’s what enthusiasts of 3-D printing technology believe.
To find out how plausible such predictions are, I sat in on a 3-D printing class at the San Francisco branch of TechShop, a studio for tinkerers and designers, where I found myself waiting to see a palm-sized toy model of the Star Warscharacter Yoda materialize from a spool of cheap fluorescent green plastic.
