Patent ID: 7605998

Claim:
A settling judgment method for judging the settling of an object at a target position of a positioning control device for performing position control, according to a position error between a target position and a current position, comprising: a step of calculating a judgment value from said position error using a predetermined judgment formula; a judgment value judgment step of judging whether said judgment value is less than a slice value, which is set such that each maximum value of maximum amplitude ratios for each frequency of a cyclic disturbance, which are ratios between a maximum value of said cyclic disturbance and the maximum amplitude value of said judgment value for each frequency of a cyclic disturbance measured when said cyclic disturbance is applied to the judgment formula, is contained within a predetermined positioning accuracy; and a period judgment step of judging whether a number of samples, of which said judgment value is less than said slice value, continue for a number of samples which is set such that the maximum value of said maximum amplitude ratios is contained within a predetermined positioning accuracy.