Patent ID: 8513910

Claim:
A method of returning a pointer driven by a motor to an origin point disposed between a starting point and an endpoint of a movement range of the pointer, the method comprising the steps of: moving the pointer from an arbitrary point in the movement range to a reference point, wherein the reference point is away from the starting point by not less than a distance between the starting point and the origin point; thereafter moving the pointer from the reference point toward the starting point; detecting while the pointer is moving from the reference point toward the starting point, the pointer by a sensor at a detection point whose relative position with respect to the origin point is known; and stopping, when the pointer at the detection point is detected while the pointer is moving from the reference point toward the starting point, the pointer moving from the reference point toward the starting point by adjusting a driving force of the motor at a predetermined point of time based on timing of the detection of the pointer at the detection point.