Stepping motor drive control device and stepping motor drive control method

摘要

A drive control apparatus includes a stepping motor, a position detection unit configured to detect a rotational position of a rotor of the stepping motor, a feedback drive unit configured to drive the stepping motor by a feedback control based on an output from the position detection unit, an open loop drive unit configured to drive the stepping motor by an open loop control, and a switching unit configured to switch the driving of the stepping motor between the driving of the stepping motor by the feedback control and the driving of the stepping motor by the open loop control, wherein the feedback drive unit and the open loop drive unit are both configured to drive the stepping motor by microstep driving.