| 摘要 |
A timepiece according to a first aspect of the invention has a fan-shaped display unit including a display wheel that can rotate, a stepping motor that rotationally drives the display wheel in both forward and reverse directions, a reverse stop that limits reverse rotation of the display wheel, and an indication means that is attached to the display wheel; and a control unit that applies pulses to the stepping motor. The position of the reverse stop is set so that the orientation of one polar axis of the rotor of the stepping motor when the display wheel is stopped by the reverse stop at the reverse stop is within ±360°/(number of magnetic poles of rotor*2) from the static stable position of the polar axis. After stopping at the reverse stop, the polarity of the first pulse applied to the stepping motor by the control unit is constant. |
