Weighing system for an apparatus able to deliver a predetermined mass, and corresponding method

A weighing system for weighing and discharging a predetermined mass of a food product, the system comprising:

• a chassis,
• an electric stepping motor carried by the chassis and having an output shaft capable of adopting different positions along a displacement axis,
• a receiving member for receiving a food product which is movable along the axis of displacement between a receiving position for receiving the food product and a discharging position for discharging the food product, the receiving member being configured to contain or retain a predetermined mass of the food product in the receiving position and to let this mass fall in the discharging position,
• an electronic control unit for controlling the electric motor, wherein the receiving member is secured in terms of displacement to the output shaft and in that the weighing system is configured so that, in said receiving position, the receiving member and the food product it contains or retains, apply a static torque to the output shaft, and that the electronic control unit is configured so as to apply a resistive torque, for a predetermined mass of the food product, to the output shaft so that, when the static torque is at least equal to the resistive torque, the output shaft changes position.