If the motors are really 2.6A as you wrote, and your drivers have .1 ohm sense resistors, the your correct VRef as calculated would be closer to 3 volts, not .95, so you are massively underdriving. I also keep asking how you are setting VRef, since I keep seeing comments about seeing voltage output, and with motors running, and none of that is correct or relevant when setting VRef . . . VRef on a Pololu is nothing more than measuring from the pot wiper to ground and setting a value . . . and it is derived from logic power, and is static . . . you don't need to have 12v or even a motor connected to make the setting . . . if you are measuring anything directly connected to the motor, you are measuring nonsense . . .
- Tim
- Tim