Green Mamba DIY 3D printer V1.3. Complete design of the printer in OpenScad+STL.
more info: http://www.optolab.ftn.uns.ac.rs/index.php/education/project-base/211-diy-3d-printer
printer on youtube:
https://www.youtube.com/watch?v=jDCqzzHqFrU
All parts are easy to print.