TriWheel OmniWheel ...

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Yes, even this design can be downloaded for free once I am fully funded for my RoboGuts S.T.E.A.M. Education Program Kits; IF each viewer donates just $5 I'll be funded almost overnight and then all my designs become free downloads! The fastest way to get all my STL files for free is to donate $5 to help fund school materials... once I have $3,500 I'll convert all these files to free downloads. https://www.gofundme.com/roboguts-kits-lessons This design allows you to make a larger wheel that can navigate small stairs/steps, maybe with your robot. Ideally, each individual OmniWheel would have a motor, but this is the affordable solution using one motor driven center gear. You can snag a 50mm diameter OmniWheel with a 3mm hub diameter out of this for your robot too... not even use the outer mounting plates. All these parts are MakerBotable... Here's a Demo animation; This design is another entry to the makezine.com/go/makerbot contest... blog.makezine.com/archive/2010/04/makerbot_giveaway.html I'm getting dizzy from all the dreaming, scheming and sketching my brains out for this contest. Instructions: MakerBot a pair and put them together to give it a try... let us know how it works if it does work. If you successfully make this with a 3D printer please send me the build-file and machine type so it can be uploaded here for others to use.