TriWheel OmniWheel ...
by SolidWorksMagi, published
This is so you can 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 is another of many entries to the makezine.com/go/makerbot contest ...
I'm starting to get dizzy from all the dreaming 'n scheming 'n sketching my brains out for this contest.
MakerBot a pair and put them and give them a try ... let us know how it works ... if it works.
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.