Patent ID: 7660211
Filing Date: 2010-02-09
Classification: G11B,H04N

Abstract:
1. A servo control apparatus comprising: a drive section that applies a thrust to a driven object to move the driven object in a predetermined direction; a storage section that stores a control circuit output initial value that the drive section first applies; an approaching control section that controls the drive section to move the driven object toward a target position; an error signal detection section that detects an error signal varying according to a difference between the position of the driven object and the target position; a start position calculation section that calculates, based on a velocity of the driven object moving toward the target position and the control circuit output initial value, a start position of a servo control process that brings the driven object to the target position, the velocity of the driven object being calculated based on the error signal; an arrival detection section that detects, based on the error signal, whether the driven object reaches the start position; a control circuit initial value calculation section that calculates, using a velocity of the driven object that has reached the start position and the start position, a control circuit initial value of a control system related to the driven object and supplies the control circuit initial value to a control circuit of the control system; and a servo control starting section that starts the servo control process when detecting that the driven object has reached the start position.