Mounting an Omniwheel

[Biolore]

So... We got omniwheels, and want to mount them. Unfortunately, we don't know what we need to mount them. The baring can just fall out. We got spacers to mount sprockets, but they don't keep it in place either. What do we need to mount them?

[Dr Theta]

We need a little more information. What type of omniwheels are you using, what type of drivetrain are you using (live axle or dead axle). My gut says you need a hub but we need more information to know for sure.

[viperred396]

Originally Posted by Dr Theta

We need a little more information. What type of omniwheels are you using, what type of drivetrain are you using (live axle or dead axle). My gut says you need a hub but we need more information to know for sure.

Pics would be good too

[Biolore]

The wheels are independent of the axel. We are using four wheel drive, 2 of them are omniwheels. http://www.andymark.com/ProductDetai...Code=am%2D0431.

[viperred396]

Originally Posted by Biolore

The wheels are independent of the axel. We are using four wheel drive, 2 of them are omniwheels. http://www.andymark.com/ProductDetai...Code=am%2D0431.

Are the omni's powered?

[Biolore]

Yes, the omniwheel are powered

[Dr Theta]

Originally Posted by Biolore

The wheels are independent of the axel. We are using four wheel drive, 2 of them are omniwheels. http://www.andymark.com/ProductDetai...Code=am%2D0431.

So it is a dead axle system, I do not personally have experience with these particular wheels however it appears that the bearings are a press fit to the center, you mount the spacers and sprockets to the wheel with bolts through the mounting holes.

[Biolore]

Yeah, the barings go into the center and they don't just slide, but they can easily be removed, like when test drove the robot before we got the sprockets, and the omniwheels came off.

[Dr Theta]

Did the wheel come off the bearing or did it come off the chain? Are you using spacers on your axle to ensure the wheel can't move laterally during operation?

[viperred396]

Originally Posted by Biolore

Yeah, the barings go into the center and they don't just slide, but they can easily be removed, like when test drove the robot before we got the sprockets, and the omniwheels came off.

If the bearings are falling off then you need longer spacers to hold them in there or you need to fabricate some screws in the wheel to told them in

So it should look like

Frame| Spacer| Bearing | Wheel | Bearing | Spacer | Frame

The spacers should be long enough so that the wheel barely moves side to side

does that answer what you were asking?

[AllenGregoryIV]

viperred396 is correct, spacers will probably be your quickest solution.

You can also use shaft collars to stop the wheels from traveling latterly and prevent the bearings from falling out.

[Biolore]

The wheel fell off of the baring. No, thats how it was when it fell off. At the time, the omniwheels were not powered (we were just testing it, and intended to make it four wheel drive). And it was Frame, spacer, wheel, spacer, frame.

[viperred396]

Originally Posted by Biolore

The wheel fell off of the baring.

It sounds like your bearing is a little bit to small

[Thermal]

Originally Posted by Biolore

The wheel fell off of the baring. No, thats how it was when it fell off. At the time, the omniwheels were not powered (we were just testing it, and intended to make it four wheel drive). And it was Frame, spacer, wheel, spacer, frame.

You are putting two bearings in per wheel right? (One per side)

I've never used the omni's but i'm largely sure they work like all the other AM wheels in which you put 1 bearing in on each side.

[ttakashima]

Are you using the single or dualie(sp?) omni? If the single you need to purchase the bearing hub off andymark. If the dualie you need to use a flagged bearing on either side and still keep those spacers. You may also use the am sprocket spacers ie: pvc-bearing-wheel-spacer-sprocket-spacer-bearing-pvc for the single wheel.