Machine tool, machining method using a machine tool, and machining program for machine tool

A machining method for a machine tool, comprising:

• mounting a workpiece to a workpiece spindle that is rotatable about a rotation axis of the workpiece;
• installing in a tool holding device, a turning tool to cut the workpiece by turning, the tool holding device being mounted on a movement mechanism configured to move the tool holding device relatively to the workpiece toward a target cutting direction perpendicular to the rotation axis of the workpiece;
• receiving an input value specifying the target cutting direction from an input by an operator through an input interface;
• executing a machining program, to perform turning, which includes an additional code which designates the target cutting direction;
• and
• controlling the movement mechanism to move the turning tool in the target cutting direction with respect to the workpiece while the additional code is executed.

A non-transitory computer-readable storage medium storing a machining program for causing a processor to perform a control method for a machine tool, the control method comprising:

• controlling a movement mechanism of the machine tool to move a turning tool of the machine tool with respect to a workpiece in a cutting direction in a three-dimensional coordinate system defined in the machining program, the cutting direction being identical to a basic cutting direction;
• receiving an input value specifying a target cutting direction from an input by an operator through an input interface;
• and
• changing the cutting direction from the basic cutting direction to the target cutting direction based on a target angle made by the basic cutting direction and the target cutting direction, the target angle being specified in an additional code in the machining program.