-- A computer program product, a control unit, a machine tool and method for operating a machine tool includes providing a control command set for a tool, providing an actual contour of the workpiece, determining a first material entrance point of the tool into the workpiece and generating a first positioning command for an approach to the first material entrance point, wherein the first positioning command specifies a track path which differs from a track path specified by the control command set, where as an alternative, or additionally, a rapid movement of the tool and or clamping of the workpiece is specified by the first positioning command. --

This machining system comprises: a CAM device for generating, on the basis of three-dimensional shape data, a machining program including an operation code; and a numerical control device for controlling an electric motor of a machine tool. The machining system is provided with a monitoring device for detecting an abnormality of the machine tool on the basis of a drive state of the electric motor. The machining system is provided with a revision device for generating a revision command for revising a parameter for when the CAM device generates the machining program. The revision device transmits the revision command to the CAM device so as to revise the curvature of a tool path and/or the feed rate of a tool for when the abnormality occurred.

A numerical controller capable of automatically calculating a tool path based on a command of a cutting path in skiving machining includes a command analysis unit that determines whether a block read from a machining program corresponds to a skiving machining command, a skiving machining command data calculation unit that calculates a path and a feed speed of a tool based on a path of a cutting point and a feed speed of the cutting point commanded by the skiving machining command when the command analysis unit determines that the block corresponds to the skiving machining command, and an interpolation unit that calculates interpolation data according to a progress rate of the block during actual machining based on the path of the tool calculated by the skiving machining command data calculation unit and a coordinate value during actual machining.

The present invention discloses a method and system for machining a work piece by a machining tool, and a robot system using the same. The method comprises: defining a customized contact point on the machining tool by setting a contact point height of the machining tool; moving the machining tool against the work piece to apply predefined machining feeds. Compared with the existing prior arts, the proposed method and system improves machining efficiency and accuracy. With the method and system according to the present disclosure, high machining efficiency could be achieved as well as collisions could be avoided.

A numerical controller capable of automatically calculating a tool path based on a command of a cutting path in skiving machining includes a command analysis unit that determines whether a block read from a machining program corresponds to a skiving machining command, a skiving machining command data calculation unit that calculates a path and a feed speed of a tool based on a path of a cutting point and a feed speed of the cutting point commanded by the skiving machining command when the command analysis unit determines that the block corresponds to the skiving machining command, and an interpolation unit that calculates interpolation data according to a progress rate of the block during actual machining based on the path of the tool calculated by the skiving machining command data calculation unit and a coordinate value during actual machining.

A computer program product, a control unit, a machine tool and method for operating a machine tool includes providing a control command set for a tool, providing an actual contour of the workpiece, determining a first material entrance point of the tool into the workpiece and generating a first positioning command for an approach to the first material entrance point, wherein the first positioning command specifies a track path which differs from a track path specified by the control command set, where as an alternative, or additionally, a rapid movement of the tool and or clamping of the workpiece is specified by the first positioning command.