A motor drive device in which the torque vector of the motor is controlled so that the correlation between the number of pulses of a clock signal and the phase of the torque vector of the motor is held in common for multiple excitation methods. The invention comprises the placement of human interpretable indicators in locations corresponding to various operations to be performed by an operator and then activating such indicators in sequence when sensors and a control algorithm confirm that operations preceding the operation in the sequence are completed. The second fluid conduit communicates with both the first chamber and the second chamber. The slicer outputs a decision signal based on an added signal output from the adder. The first time value is subtracted from the sum and the two most significant bits are removed.