JimboZA:
HazardsMind:
I am not familiar with the one you have so I have no clue what the problem is. How about this one.
http://www.ebay.com/itm/L298N-Dual-H-Bridge-IC-Stepper-Motor-Driver-Controller-Board-Module-for-Arduino-/300864612676?pt=LH_DefaultDomain_2&hash=item460ceda944With a 298 in there he's going to lose 2-3 volts at the motors straight off the top....
Btw, have you tried to code the acceleration in, as I suggested and as you elaborated in code earlier?
And tried it on a floor with no carpet? As the wheel sinks in the pile, as it moves off it has to flatten the pile in front and that takes energy.
Yes I did it didn't work, the problem is not accelerate or the code. The motor driver kept shutting off from over heating, I guess the motors were drawing more than 2.5 amps, and the motor driver couldn't handle it.