Patent ID: 6859007

Claim:
A servo motor drive control device for driving and controlling a periodically operated drive object by means of a servo motor, comprising: a position detector for detecting the position of said drive object; means for obtaining the positional deviation between a positional command supplied to the servo motor and the position of said drive object as fed back by said position detector, for each sampling cycle; first converting means for converting said positional deviation into a positional deviation at a prescribed position with respect to a reference position output in synchronization with the drive of said drive object; correction data calculating means for obtaining, from the positional deviation at said prescribed position determined by the first converting means, correction data corresponding to the prescribed position; storing means for storing the correction data obtained by said correction data calculating means, for at least one cycle; and second converting means for converting the correction data for said prescribed position stored in said storing means, to correction data for each of said sampling cycles; wherein the position of said drive object is controlled on the basis of said positional deviation and the correction data obtained by the second converting means.