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Blog with project history: http://deltabot.tumblr.com Videos: http://www.youtube.com/user/jcrocholl/videos?query=rostock More pictures: http://flickr.com/photos/jcrocholl/tags/rostock More details about parts: http://thingiverse.com/tag:rostock OpenSCAD source files: https://github.com/jcrocholl/rostock Documentation: http://reprap.org/wiki/Rostock Ask questions here: http://groups.google.com/group/deltabot Rostock is a delta robot 3D printer prototype with the following design goals: Build volume: 8x8x16 inches or 200x200x400 mm Footprint: 12x14 inches Print surface: 8x8 inches heated glass which never moves Mass of end effector with two hotends: less than 150g Positioning speed: 800 mm/s in all 3 directions Positioning accuracy: at least 30 steps/mm in all 3 directions Simplicity: fewer than 200 parts (not including washers, nuts and SMD-mounted electronics) Hardware cost: less than $500 USD Inspiration: search YouTube for "flexpicker" or "adept quattro". Closest ancestor: http://www.heliumfrog.net63.net/deltarobot/delta.html