Baratza wrote:Calibrating the Vario with the new calibration screw.

Baratza's first shipment of Vario's (March 2009, serial # 001 to 270) were calibrated at the factory to grind too fine. We then changed the factory setting for the Vario so it could be adjusted fine enough for espresso and coarse enough for Press Pot. Since we made this adjustment at the factory we have had much fewer calibration issues. Beginning with serial #271, Baratza added a secondary calibration screw (2mm Allen head set screw) in a round hole between the discharge chute and the calibration grommet. This calibration screw allows the user to easily adjust the calibration in the finer direction with the grinder running. To make the adjustment, empty all beans from the grinder, lower the Macro and Micro levers all the way to the bottom and run it briefly to expel any partially ground coffee. Press the Manual button and then the Start button. While the grinder is running, raise the Macro arm all the way to the top (Espresso). You should not hear any change in motor speed. Now raise the Micro arm up the midpoint. You should begin to hear the motor slow (or labor a little). If not, use a 2mm Allen wrench to slowly turn the 2mm set screw clockwise (when looking up at the screw) until you begin to hear the motor slow or labor. You are done!