Control method for machine tool

A control method for a machine tool including two or more translation axes and at least one rotation axis, in which a command for a distal end position of a tool and an attitude of the tool is provided to correct an error in the distal end position and the attitude with respect to a workpiece due to a geometric error so that a command value for controlling the translation axes is calculated, the method comprising:

• calculating the command value on the basis of:
• a command coordinate value for the distal end position set in advance;
• a converted coordinate value obtained by converting a coordinate value of a rotation center point of the rotation axis in an actual state with the geometric error into a coordinate value without an error in inclination of the actual rotation axis with respect to the rotation axis in an ideal state without the geometric error, using a coordinate value of a correction reference point which is a point designated in advance in a machine coordinate system of the machine tool or a workpiece coordinate system;
• and
• an axial unit vector for the ideal rotation axis.