Patent ID: 8181565

Claim:
A method for measuring a quantity of coffee M Ni or M Ti that a grinding burr of a coffee mill driven in rotation by a motor dispenses in a predetermined number of revolutions N i of the grinding burr or in a predetermined time interval T i , said method comprising: applying a supply voltage to the motor in order to drive the motor and the burr in rotation; providing a sensor for counting the number of revolutions of the motor for producing a signal indicating the speed of the motor; determining, on the basis of the signal from the sensor, the average speed V i of the grinding burr over a number of revolutions N i or respectively over the time interval T i ; and determining the quantity or mass M Ni of coffee dispensed during the number of revolutions N i or respectively the mass M Ti of coffee dispensed during the time interval T i as a function of the speed V i from an experimentally obtained stored correspondence table (V i , M Ni ) or (V i , M Ti ).