Abstract: A library apparatus includes a storing unit configured to store a plurality of recording media and a transporting unit configured to shift in a first direction and in a second direction that intersect each other and to transport the recording media. The transporting unit includes an accommodating unit configured to be able to accommodate a plurality of the recording media and a transferring unit configured to transfer the recording media one by one between the storing unit and the accommodating unit.

Abstract: When a processor sets a current instruction value and a rotating direction of a motor, two analog instruction signals of a positive polarity and a negative polarity are obtained after completion of a D/A conversion, the analog instruction signal of the negative polarity is selected by an instruction in the CW direction, and the analog instruction signal of the positive polarity is selected by the instruction in the CCW direction. The analog instruction signal of the polarity selected is added to a motor current detection signal which was negatively fed back by an adding circuit, so that an analog deviation signal is derived. A pulse width modulating circuit section outputs a PWM pulse in the CW direction for the negative polarity of the analog deviation signal and outputs a PWM pulse in the CCW direction for the positive polarity.