A method for the high-precision measurement of coordinates of at least one structure on a substrate. According to the present invention, a delay circuit is constructed in order for a refresh operation and a normal operation to have different delay paths such that a minimum tRAS delay time of the refresh operation to which tRFC is applied is longer than a minimum tRAS delay time of a normal operation to which tRC is applied. In addition, the weight of a patients body may be used to counterweight the recoil effect to minimize stapler recoil during ejection of a staple from the stapler into a patient.