The D-Track is a versatile, printable robot designed for both teleoperation and autonomous behaviour. Its unique design, inspired by the 4-Track by Jon Goitia , preserves all the advantages of wheel and track-based motion while overcoming some of its disadvantages: the articulated tracks allow the robot to handle difficult surfaces and overcome obstacles that would limit the motion of simpler wheeled vehicles.
You can find a demonstration video here: http://www.youtube.com/watch?v=GeIoDcqjSoo
Thanks to LeemonBaird for the involute gear library: http://www.thingiverse.com/thing:5505
Please refer to the attachment bom.txt for piece quantities and aditional assembly materials. Detailed, step-by-step assembly instructions, electronics schemes and code are coming soon.