Machine tool

摘要

In a lathe 1, an angular position beta x for respectively positioning a single tool in the plural numbers of directions of the tool edge is computed according to designated shape information IFa, and the tool 25 held by the tool holding body 22 can be positioned in the plural number of directions of the tool edge in order by indexingly positioning the tool holding body 22 in the B-axis direction on the basis of the computed angular position beta x at the time of machining. A plurality of machining modes can be machined with a single tool.