TankRap

https://www.youtube.com/watch?v=TBOkLRoWxTE&feature=youtu.be

NOTE: The company that sold the lead screw drives for this design (Trinity Labs) has gone out of business. I have not yet found a replacement. That does not mean they are not out there somewhere. Just make sure you have them in hand before dedicating a tremendous amount of plastic to the construction of this machine. I do plan to revise the design to also use common off-the-shelf hardware, in which case it will be truly scalable on any axis.

BE SURE TO DOWNLOAD THE LATEST BUILD PDF!
TankRap #1 has been commissioned and is working properly. Notes are in the construction PDF. Yoda tested at 70% reduced size, with .5mm hot end (white ABS, yellow PLA, see photo).
The TankRap is an easy-to-assemble 3D printer, built like a tank, with accuracy in mind.

TankRap #1 survived international transit as checked luggage, and nothing broke. Testament to its ruggedness :)

This is a complete file set to build a TankRap 3d pri