Redesigned from scratch after lessons learned from printing the first version. This makes use of the Involute Spur Gear Script from Greg Frost ( http://www.thingiverse.com/thing:3575 ) and the Spur Gear Fitter Script by cbiffle ( http://www.thingiverse.com/thing:6894 ) rather than my own terrible terrible gears.

Special thanks to Dna for designing his Rubber Band Ratchet Engine ( http://www.thingiverse.com/thing:6939 ) to power this mechanism and for creating a video rendering of the mechanism in action:

http://www.youtube.com/watch?v=IDTNTEjXaco

I've included an STL of the entire thing assembled, that's just so you can see how it's put together.

An ideal assembly would make use of two full clockwork spider mechanisms with a rubber band engine in the middle to turn both center gears.

I would highly recommend printing this using a MK6 or other stepper extruder. If you use a DC based extruder the clean up will be a pain.

1. Print all plates one time (each is only about 15 minutes or so)
2. Fit parts together
3. Rotate center gear to walk