pic: Traction test

[XXShadowXX]

Originally Posted by Rosiebotboss

The robot on the right won every time. Why?

Static vs dynamic friction
Static inline 0.06
Dynamic inline 0.05

4 motors allows the wheel to reach top speed faster, then the two. The Cof, increases until it peaks at static, then approaches 0( or some value, that is less then static friction), as the wheel speed increases. Since the 4 motors reach top speed faster the can't exert their larger force, the 2 two can since they accelerate slower due to the lower torque.

Also, the force of fiction is Cof*P (pressure* Fiction) by having two wheels per side driven you decrease the pressure P (P=F/A, force/area), the force is the weight of robot, a large area will decrease your ability to move, by increasing the force of fiction. This also hurts the 4 motor design.

Thats two answers to your questions, heres the solution:
TCS, Traction Control System.