Quote:
Originally Posted by rwkling1
make sure the bearings flanges inside of your gearbox is in the right orientation, so they're not grinding together, slowing one side down.
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[emphasis added by me] THIS. Our robot could hardy even move when we first drove it (a few days ago :P ). We implemented a crude feedback loop to correct for it using the gyro (which worked fairly well), but we later disassembled the gearboxes to find out the problem. We checked our individual wheel speed and two of them were severely off. It turns out that two of our four gearboxes had the bearings improperly installed, causing them not to function properly. From what I heard, it was really difficult to spot, and was only found out when attempting to disassemble and reassemble the entire thing (meaning it wasn't blatantly obvious, regardless of whether or not the gearbox was assembled).