METHOD FOR SETTING BOTTOM-TOUCHING-DETERMINATION STANDARD

Provided is a method for setting a bottom-touching-determination standard that makes it possible to highly reliably set a parameter-based bottom-touching-determination standard. This method for setting a bottom-touching-determination standard includes a screwing step for screwing a measurement screw (11) into a measurement screw hole (13a), a parameter acquisition step for acquiring a parameter from the screwing step, a bottom touching determination step for determining whether the measurement screw has touched the bottom on the basis of the axial force of the measurement screw, and a determination standard setting step for setting a bottom-touching-determination standard by comparing the parameter and the result of the determination in the bottom touching determination step. 本发明提供一种触底判定基准设定方法，能够可靠性高地设定基于参数的触底判定基准。触底判定基准设定方法包括：螺合步骤，使测定用螺丝(11)与测定用螺丝孔(13a)螺合；参数获取步骤，获取螺合步骤中的参数；触底判定步骤，基于测定用螺丝的轴力，判定触底的有无；以及判定基准设定步骤，将触底判定步骤中的判定结果与参数进行对照来设定触底判定基准。