Quote:
Originally Posted by AllenGregoryIV
We used VersaWheels this season and really liked them. Like other teams have said they do ware but when they are new they hard to beat. The idea that they lack lateral traction is a bit more complicated I think than people are making it out. A new set of VersaWheels that still have their corners when pushed sideways (for instance in a t-bone collision) dig into the carpets like cleats. It's pretty hard to move them.
It will be interesting next season when VEXpro releases the tires for their traction wheels.
|
The Lateral Traction of Versa Wheels probably isn't as simple as I described it in my previous post. I also observed the 'cleating' effect that you're describing, especially when being pushed from the side while not in motion or moving all that quickly. That being said, once the robot is in motion and turning, this cleating effect seems to go away almost entirely. I guess a more appropriate way to describe this would be 'scrub' or turning resistance.
Thinking about it more, the effective scrub could have a lot of do with the forces on the robot, in our case, our CoF was lower than most (with the arm down) meaning that while turning the robot stayed relatively flat but while being t-boned, there was a noticeable tipping towards one side (side being pushed would be lifted). I suspect that this tipping is a major player in the lateral characteristics of the wheel, if it stays flat it's going to have more of a tendency to 'slice' through the carpet, but if it tips you'll get a cleating effect.