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HOWTO Make a 3D printer out of Legos
Boing Boing — ... and as opposed to a Cartesian printer whose principal axes are X(left/right), Y(up/down). In other words, it moves just like a polar coordinate system. So why did I make a polar 3D printer instead of a good ol' Cartesian 3D printer? 1. I didn't have enough Legos to build a Cartesian printer. 2. I hope to eventually add a 3D laser scanner to it so I can scan in objects and send them to another printer somewhere else in world. Making sort of a 'teleporter'. Build a Polar 3-D Printer from Legos (via Beyond the Beyond) ...

LEGO 3D printer
MAKE Magazine: hacks — ... Gene Hacker created a 3D printer out of LEGO. It's like a lo-rez reprap that operates in polar coordinates instead of the more familiar cartesian system. This is still very alpha and his demos show some promising 3D blobs of frosting. With that in mind, however, most of the basic functionality of a rapid fabrication system is here. Hacker posted the necessaries to Instructables, so you should be able to replicate his design and put your mind to making it even better. Build a Polar 3-D Printer from Legos [via BoingBoing]

Spinning LEGOs Produce 3-D Blobs
GEARFUSE — ... on Instructables: a 3-D printer made out of LEGO bricks. It’s still in its infancy of development but is more than capable of rendering 3-D blobs of frosting. Unlike regular Cartesian system printers, the one Gene built operates in polar coordinates, in other words, a circular motion of printing. When asked why he didn’t build a Cartesian system printer (similar to the LEGO scanner ), he replied,“I didn’t have enough LEGOs to build a Cartesian printer.” Now, that’s funny. Link [ via ]