| 摘要 |
PROBLEM TO BE SOLVED: To accurately detect rotating status, including intermediate stopping.SOLUTION: A rotation detection circuit 105, when it detects whether an induction signal VRs produced by rotation of a stepping motor 105, in a detection section having a plurality of sections, exceeds a predetermined reference threshold voltage, detects whether the induction signal VRs exceeds the reference threshold voltage by reversing the polarity of the induction signal VRs in a predetermined section; and a control means, upon determining the symptom that the stepping motor 105 takes an intermediate rest, based on a detection result of a rotation detection circuit 110, immediately drives and controls the stepping motor 105, based on a correction drive pulse P2. |
