| 摘要 |
PURPOSE: To prevent the trouble of a position detector, and prevent the change of a rotating speed of a motor, and the noise, by installing a sensor on a driving shaft of the motor which displaces a piston of a chamber in which a flavor material is housed, and controlling the input power of the motor on the basis of the signal of the sensor, by a controller. CONSTITUTION: A detector 30 is engaged with a driving shaft 121 of a motor 120, for detecting a number of revolution of the driving shaft 121, and generating an indication signal. A processer receives the signal, counts the indication signals from the detector 30, and calculates the displacement amount in the axial direction, of the piston 10, on the basis of the fixed relationship of the angular displacement of the motor driving shaft, and the displacement in the axial direction, of the piston 10. The detector 30 is not connected to a component of a coffee maker to be cleaned, so that it becomes unnecessary that the detector is removed for the cleaning, and the processer can get information on the real position of the piston 10. |
