Examples of wide-based robots using traction and omni wheels

[ttldomination]

http://www.youtube.com/watch?v=Ge8AA...9&feature=plcp

We had a long base 4wd with a set of omnis in the back. Obviously if it worked with long, then it'll turn fine on a wide drive base.

- Sunny G.

Originally Posted by ttldomination

http://www.youtube.com/watch?v=Ge8AA...9&feature=plcp

We had a long base 4wd with a set of omnis in the back. Obviously if it worked with long, then it'll turn fine on a wide drive base.

- Sunny G.

Thanks!

[EricH]

Originally Posted by ttldomination

We had a long base 4wd with a set of omnis in the back. Obviously if it worked with long, then it'll turn fine on a wide drive base.

- Sunny G.

Too well, possibly.

A wide wheel base won't have nearly as much trouble turning as a long base anyway. Just go with 4 tractions/lunacy wheels if you're doing a wide base; adding omnis could result in too much turnability.

Originally Posted by EricH

Too well, possibly.

A wide wheel base won't have nearly as much trouble turning as a long base anyway. Just go with 4 tractions/lunacy wheels if you're doing a wide base; adding omnis could result in too much turnability.

Our problem is we want to extend the wheels out a bit farther, and our wide robot already has a larger wheel base than our long 6 WD.

[PayneTrain]

Exxperiment with omnis and tractions in opposite corners.

O---------T
l----------l
l----------l
T---------O

Originally Posted by PayneTrain

Exxperiment with omnis and tractions in opposite corners.

O---------T
l----------l
l----------l
T---------O

This seems interesting, but I don't see why it's any better than tractions in front and omnis in the back.

[PayneTrain]

The benefit will lie in turning.

Originally Posted by PayneTrain

The benefit will lie in turning.

Your wording makes we want to test that right now. I think we'll possibly stick to using *gulp* Lunacy wheels. They fit our needs, and we'll be able to keep our bot the way it is without changing too much right now.

[ttldomination]

Originally Posted by SuperNerd256

This seems interesting, but I don't see why it's any better than tractions in front and omnis in the back.

One thing that the team felt in 2010 (the video above) was a significant amount of fishtailing. With the wide base, perhaps you'll feel a significant amount of that compounded with increased sensitivity.

With the setup that PayneTrain has suggested, notice that there is no real point about which the robot can fish tail. It forges stability into a potentially unstable design all while distributing the weight over omni wheels and traction wheels.

- Sunny G.