[EricH]

Originally Posted by Lowfategg

I think both of you miss understood me but its my fault since I am not quite down with this 2WD, 6WD... etc... lingo.

The best setup I think of for a FRC bot is a 6 wheel tank style bot using omni wheels as casters on the outside wheels and traction wheels in the center. I would also make it so all wheels would be touching the ground.

Also I understand what omnidirectional is and the different types of it but I was asking what seems to work best in different situations.

Here's a quick interpretation with the setup you described:

2WD--Center wheels are the only powered ones.
4WD--Center and one end are powered.
6WD--All wheels are powered.

Now, I want to warn you, that setup can be easy to turn. There are ways to fight that, however.

A similar setup is the "rocker" setup. If you see the Kitbot frame, one hole right in the middle is lower than the rest. The "rocker" or "drop center" lowers the middle wheel slightly to give the same maneuverability as a coplanar with omnis on the corners, but it's harder to turn because all six wheels are traction wheels.

What works best in different situations depends on the game. Some teams are able to make mecanum or swerve work year after year. Others stick with skid steer (the standard 2WD, 4WD, 6WD, tank tread). Others switch between the two depending on the game challenge. I really can't answer that question before January.