[EricH]

Originally Posted by Alex357

i'd like to see a picture of what you've done. Have you driven with it or anything yet? no bearings? how are you're rollers attached to the hub? is that even more parts? did you mold any parts inside the rollers? are these mecanum wheels or omni/grenade wheels?

Sorry I took so long to respond, but here are the answers.

Have you driven with it? I only drove the EDUbot prototype. Others have driven the real thing.

No bearings? Two bushings pressed together (one was smaller than the other) formed the bearing on each side of the wheel. Nylon is slippery enough that the rollers didn't need bearings.

How are your rollers attached to the hub? The hub looks something like two thin Skyways with a connecting bar between the hubs. The rims have holes in them to hold steel axles, which are kept from falling out by a piece of lexan screwed to the outside.

Is that even more parts? No. The roller axles were labeled as shafts in the parts list.

Did you mold any parts inside the rollers? Nothing in the wheel was molded. It was all formed using SLS (a laser drawing patterns in powder). There are no parts inside the rollers.

Are these mecanum wheels or omni/grenade wheels? Mecanum, something like what some airlines use to unload containers from airplanes.

The only picture I have is of the side of the hub, nothing else was attached.