UPDATE: 11-13-2012... the Printrbot jr. The Printrbot Kickstarter completely consumed my life for the last year. Transitioning to a viable business and juggling competing priorities has also been a challenge. I have been completely absent from updates and such. My absence from this wiki, the forums, irc, etc, does not reflect on my passion for RepRap. I have recently finished my Printrbot jr. design in laser cut wood. It is quite small, but grew a bit to make it sturdy, practical and include a folding hinge to collapse it down enough to fit in a backpack and carry on a plane -which I do every time I fly. I have even used my printer on the plane at 36000 feet! Since the Jr has been well received, I am excited about considering the design final and converting this design to an absolute minimal plastic version that is even smaller. Both designs, the laser cut AND the RepRap jr. will be completely open source. The idea is to make the jr reprap version the smallest and cheapest to build. Minimalism and simplicity will be key. While I won't be able to scale this design to 12" x 12",
I have broken the $200 cost barrier. barely. The Ubis hotend and Printrboard combo we designed is still the most efficient setup out there to my knowledge at 2.5-3.5 amps (peak) at 12 volts amounts to 30-42 Watts. Admittedly, that leaves very little room for a heated build platform.
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