Recently Ive been looking into options for 3D rapid prototyping. There are two main categories, additive and subtractive. Additive involves depositing a liquid material that hardens, subtractive involves cutting out of a preexisting object. A few years ago the only options were tens to hundreds of thousands of dollars, and required specialized software and knowledge to operate. Now thanks to the open hardware movement there are more options available, and for less money. Read on for my initial investigation into what is available.

http://www.makerbot.com/

http://www.probotix.com/

http://lumenlab.com/

http://www.epiloglaser.com/ http://www.ulsinc.com/versalaser/

http://reprap.org/

http://fabathome.org/
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