[Lil' Lavery]

116 found in 2005 that contact was incredibly important with our holonomic drive (I'd assume it would be the same with a mecanum). Even the very small elevation change of the plywood triangles in front of the loading stations caused problems, as one wheel would lose contact with the ground. (If we drove "North" corner first. Once the North corner was raised happened, either the "East" or "West" wheel would lose contact, as the robot had a slight tip to one side to rebalance itself, which was problematic, as the East and West motors are needed for movement on the North/South axis). We had a system where we could adjust the wheels relative to the frame, but it wasn't active, and it couldn't be done on-field. So, even the slightest imperfections can cause problems if you don't have some sort of suspension system.