A method of controlling semi-frozen liquid beverage in a dispensing machine having
a bowl to contain the beverage, a motor to turn a helical auger blade within the
bowl to scrape the semi-frozen beverage, and a compressor to cool the beverage.
The method includes the steps of actuating the compressor to the bowl until the
temperature of the beverage is cool to reach an initial set point. The compressor
is deactivated after temperature of the beverage is cooled at or below a set point.
Torque on the motor caused by resistance to the auger blade is sensed after a defined
time period following switching off of the compressor. The compressor is activated
if the torque on the motor is below a certain level and the temperature set point
is lowered from the initial set point to a lower set point in order to cool the product.
