3d delta printing

3d delta
http://www.thingiverse.com/thing:287103  http://www.electronhacks.com/category/electronics/3dprinting/
 * http://us.misumi-ec.com/vona2/detail/110300465870/?KWSearch=HFS3-1515&catalogType=00000034877 Aluminium extrusion

http://www.think3dprint3d.com/Kossel-Mini-3dPrinter-Kit Kossel

https://www.kickstarter.com/projects/2117384013/flux-all-in-one-3d-printer-unlimited-elegant-simpl FLUX

Magnetic ball joints
http://www.thingiverse.com/thing:408100/#comments