If this is the voltage to your steppers, it's more than likely not enough to move them. Sounds like a supply issue or your stepper drivers are damaged.
Maybe you mean your vRef on your drivers. Did you go through and tune them?
Taken from the build guide:
X/Extruder - Single Motor -Tune to 0.7-0.9v
Y/Z - Dual Motors on one driver - Tune to 0.9-1.3v