[Al Skierkiewicz]

So that we don't confuse the casual visitor, the voltage generated when the robot is off and is being pushed is generated voltage. Back EMF (or counter EMF) is the condition where a motor connected to a power source creates an induced voltage that opposes the supply voltage. This induced voltage is opposite in polarity to the supply voltage and tends to reduce current flow in the windings of the motor. Back EMF increase with motor speed.