3 wheel vs 4 wheel vs 6 wheel

[NoodleKnight]

Originally Posted by 663.keith

treads can be very fast and easy to turn if done correctly. We have a robot that is by far the fastest we have built and he uses treads. conversely, one of our 4wd robots was terrible at speed, and could barely turn (it used a wonderful "Bounce turn"). I believe that treads work better than 4 wheels in many cases.

That depends on how you build it, if you drop the center portion of the tread (much like most 6wd designs with their center wheels), then turning on a tread drivetrain can be better than a 4wd platform. But if your treads are just 100% level, then there's a whole lot more side-friction to overcome compared to a 4-wheel drivetrain.
As for speed, that depends on your motors, gearing, and drivetrain efficiency.

We also had that problem with our 2003 robot, where would hop side to side when it would turn. It had too much traction and only weighed like 90 lbs.

Personally, I like 4wd, its a good balence between drive systems. Plus the kitbot is set up to do so.

EDIT: When I read 3wd, I actually thought you meant an actual 3WD robot with only 3 wheels, kinda like a kiwi drive platform. But if you're talking about a 2wd caster bot, I've always had bad experiences with them, but with some modifications, it can be good.