A numerical controller configured for simultaneous control such as to cut a workpiece in order in the direction of a rotary axis by a plurality of tools, in a machine having a plurality of cutter holders fitted individually with the tools and capable of lathe turning, generates movement command data for locating the plurality of tools so as to cut the workpiece with the same depth of cut and controlling respective relative speeds and relative positions of the plurality of tools so that respective cutting points of the tools move back and forth in order; generates interpolation data based on the movement command data; and controls a motor for driving the machine, based on the interpolation data.

A method for machining a longitudinal profile section having an actual length and a first and a second end, wherein the first and the second end are machined using respectively a first and a second tool head and material is continuously abraded by the first and second rotating tool head during a machining period, the machining period is divided into time increments (ti), a torque (M(ti,) M(ti)) of the tool head is measured for each time increment (ti) and an individual energy consumption (E(ti), E(ti)) is determined for each time increment (ti), said individual energy consumption corresponding to an individual quantity of material abraded during the time increment (ti), and a total energy consumption (E(t), E(t)) both of the first and of the second tool head is determined from the individual energy consumptions (E(ti), E(ti)), said total energy consumption corresponding to the total quantity of abraded material.

A numerical controller configured for simultaneous control such as to cut a workpiece in order in the direction of a rotary axis by a plurality of tools, in a machine having a plurality of cutter holders fitted individually with the tools and capable of lathe turning, generates movement command data for locating the plurality of tools so as to cut the workpiece with the same depth of cut and controlling respective relative speeds and relative positions of the plurality of tools so that respective cutting points of the tools move back and forth in order; generates interpolation data based on the movement command data; and controls a motor for driving the machine, based on the interpolation data.

Disclosed is an artificial tooth machining apparatus which protects a workpiece and first and second tools from heat and frictional contact that may occur when the workpiece is machined and enhancing machining precision by supplying water or air to the tools by a supply unit, a first nozzle portion, and a second nozzle portion, which has a lifespan lengthened by preventing chips of the workpiece or water or air from being introduced to a mechanism operation part of a base part by a discharge unit and a blocking unit, and which prevents a collision between the first tool and the second tool during machining of the workpiece by a tool collision preventing controller.

A numeric controller is provided with a three-dimensional model storage which stores a three-dimensional model of at least one of a workpiece and a jig; a three-dimensional measuring unit which integrally measures shapes of the workpiece and the jig fixed to the machine tool; and a shape processor generating an integrally measured model based on the measured data, in which the workpiece and the jig being integrally recognized, measured by the three-dimensional measuring unit, and further generating, regarding at least one of the workpiece and the jig, an individually measured model in which the workpiece or the jig is individually measured based on the generated integrally measured model and the three-dimensional model of the workpiece or the jig.