This is a desktop-size, open-source milling machine in kitform, built from lasercut parts.
We know several people have tried to put a Dremel inside a Makerbot, but we don't think this makes much sense. You'll have a high center of gravity and a light frame. We love our Makerbots, but we think if we put a Dremel toolhead in them, they'll just vibrate apart :)
We designed something from the ground up to be stable, rugged and still light-weight enough to be carried around. (actually, the one I'm showing in Paris this weekend now features a suitcase handle on the steel frame)
The machine has an open floor, allowing it to do a milling operation on a large object.
The machine was specifically developed to have a low center of gravity and be a portable, yet stable platform.
The machine uses a microATX 12V power supply and Makerbot electronics
The current version has a 175x175 mm cutting area.
The machine can easily be enlarged along the X-axis, as the machine is built from a number of modular parts.
There's a short video of the working machine on http://www.repairablemachines.com/updates.html
You'll also find some stuff we made with it there.
The plans are uploaded here and on www.repairablemachines.com.
We also make kits for this machine, we can provide you with all the parts you need to assemble this into a fully working milling machine
UPDATE SEPTEMBER 2011: we published version 1.08 of this machine
It now has:
-improved accuracy, better than 0.2mm
-version numbering engraved on all parts
-a more rigid Z-axis