Mini omni wheel prototype

thingiverse

I REDID THIS IN OPENSCAD - UPDATES WILL BE POSTED ON THE NEW OBJECT PAGE. This is my try at remixing Arcwave's O-ring based omni wheel with mbbackus's split-ring one. Arcwave's O-ring concept is great for traction, but the spinners are on plastic axles in a plastic housing, so rolling friction appears poor. Mbbackus uses a split ring to give the axle and it's fantastic, but he uses washers as spinners, which makes me think traction would suffer. Lastly, I don't need them that big like either design, and I had 1.5" split rings on hand so mine are tiny, and use 8mm ID O-rings instead of 1/2" ones. I haven't got the O-rings in yet so they're untested right now. The wheel hub halves and spinners do print and go together but I haven't checked if the spinners will still work well with O-rings, or overall functionality. You can use them, but they may not be good. PRINT the following per wheel: (2x) hub halves* (12x) spinners I've also got an STL for one full hub but I'm not sure how to put a split ring on it when it's whole. GET the following per wheel: (1x) 1.5" split ring (key ring) (12x) 13mm OD / 8mm ID / 3mm thick rubber O-ring (search online, they're sold in hundreds for tattoo places because they're used in piercings). Something to join the two hub halves (screws, glue, etc.) DO this stuff: Put a rubber O-ring around each spinner. Place the 12 spinners onto the split ring like a key. Push two hub halves into the split ring, putting the spinners into the open slots. For any spinners that don't spin freely, take them back off and widen the hole with a round file, drill bit, or even strip it wider with a screw. Stick to robot, drive every direction ever.