into the member 46 the valve 47 is turned in the valve house 50 and the passage 43 48 49 will open and the dough will be extruded fig7 shows the automatic control system 55 of the machine the multiple contact switch 52 sends a signal to the pressure selector 51 which adjusts the motorized pressure reducer 23 according to which cylinder is in use under the piston 3 the pressure reducer is connected to the adjustable unit 58 for the output the clock 57 measures the time t between signals from the light receiver 17 and calculates 60 t as the frequency of cakes per minute and illustrates that number digitally for example 41 cakes min the control system 55 compares the measured frequency 41 cakes min to the adjusted frequency 60 cakes min and increases the pressure if the measurement is lower than the adjustment and vice versa the pressure is increased by signals to the pressure reducer 23 the control unit 55 may be a computer the conveyor belt 11 is connected to the control unit 55 and receives signals for intermittent motion or even speed according to signals from it and receives the adjusted change of speed from the unit.