A 5-axis processing machine includes a mounting table on which a tool and a work piece are placed; and a control unit; wherein the mounting table is moved relatively by three linear axes and two rotation axes based on NC data, the two rotation axes include a first axis and a second axis, when the control unit calculates a rotation angle of the two rotation axes, the control unit acquires an axis vector Na that specifies an actual first axis direction and an axis vector Nc that specifies an actual second axis direction, the control unit calculates a posture vector K that specifies a posture at a time of processing the work piece with respect to the tool from the NC data, the control unit calculates, as a solution of a following equation (4), an actual rotation angle θ around the first axis of the tool.

A 5-axis processing machine includes a mounting table on which a tool and a work piece are placed; and a control unit including a calculation unit, a determination unit, and a correction unit; wherein the mounting table is moved relatively by three linear axes and two rotation axes based on NC data, the two rotation axes include a first axis and a second axis, the calculation unit calculates an orientation of the work piece with respect to the tool at a time of processing from NC data and a directions of rotation centers of an actual first axis and an actual second axis, the determination unit determines whether or not the calculated orientation of the work piece is included in an inoperable range, the inoperable range being the inoperable angle range, and the correction unit corrects the orientation of the work piece with respect to the tool.

A 5-axis processing machine includes a mounting table on which a tool and a work piece are placed; and a control unit; wherein the mounting table is moved relatively by three linear axes and two rotation axes based on NC data, the two rotation axes include a first axis and a second axis, when the control unit calculates a rotation angle of the two rotation axes, the control unit acquires an axis vector Na that specifies an actual first axis direction and an axis vector Nc that specifies an actual second axis direction, the control unit calculates a posture vector K that specifies a posture at a time of processing the work piece with respect to the tool from the NC data, the control unit calculates, as a solution of a following equation (4), an actual rotation angle θ around the first axis of the tool.

A 5-axis processing machine includes a mounting table on which a tool and a work piece are placed; and a control unit including a calculation unit, a determination unit, and a correction unit; wherein the mounting table is moved relatively by three linear axes and two rotation axes based on NC data, the two rotation axes include a first axis and a second axis, the calculation unit calculates an orientation of the work piece with respect to the tool at a time of processing from NC data and a directions of rotation centers of an actual first axis and an actual second axis, the determination unit determines whether or not the calculated orientation of the work piece is included in an inoperable range, the inoperable range being the inoperable angle range, and the correction unit corrects the orientation of the work piece with respect to the tool.