Machining tool comprising a frame in which a drive shaft for a tool is mounted so as to pivot about a rotation axis and to move axially along the rotation axis. The shaft is connected to two rotary motors, namely a first motor connected to a member for meshing with a fluted portion of the shaft in order to drive the shaft in rotation and a second motor connected to a nut engaged with a threaded portion of the shaft in order to move the shaft axially. The motors are connected to at least one control unit designed to control the motors independently of one another, and the first motor and the second motor are coaxial with one another.

A machine tool accessory including a monolithic flexure travel guide, a motor, and a position feedback sensor is provided. The machine tool accessory also includes an accessory tool spindle configured to rotate a tool, the accessory tool spindle being disposed within the monolithic flexure travel guide. The motor is configured to move the monolithic flexure travel guide, and the position feedback sensor is configured to measure position of the monolithic flexure travel guide. In some embodiments, the machine tool accessory further includes a controller configured to (i) communicatively couple to the motor, (ii) communicatively couple to one or more external devices, and (iii) cause the motor to move the accessory tool spindle in response to signals received from the one or more external devices.

Provided is a machine tool with which the accuracy of a stop position of a drive subject can be improved in a case where semi-closed loop control is performed. The machine tool includes a guide mechanism for guiding at least one drive subject among the tool and the workpiece, a servo motor that moves the drive subject guided by the guide mechanism, and a control unit that performs semi-closed loop control on the servo motor so as to move the drive subject from an initial position to a target position. The control unit performs the semi-closed loop control so as to apply to movement of the drive subject a vibration component with which, from a midway position between the initial position and the target position to the target position, an advancing motion toward the target position and a retreating motion opposite to the advancing motion are performed repeatedly.

Provided is a machine tool with which the accuracy of a stop position of a drive subject can be improved in a case where semi-closed loop control is performed. The machine tool includes a guide mechanism for guiding at least one drive subject among the tool and the workpiece, a servo motor that moves the drive subject guided by the guide mechanism, and a control unit that performs semi-closed loop control on the servo motor so as to move the drive subject from an initial position to a target position. The control unit performs the semi-closed loop control so as to apply to movement of the drive subject a vibration component with which, from a midway position between the initial position and the target position to the target position, an advancing motion toward the target position and a retreating motion opposite to the advancing motion are performed repeatedly.

A workpiece machining method that machines a workpiece surface by moving a rotating tool, which has a cutting blade for interrupted cutting of the workpiece surface, relative to the workpiece comprises: a first process of determining the pattern of arrangement of multiple cavities on the surface of the workpiece formed after cutting by the cutting blade; and a second process of determining the tool path of the rotating tool so that the multiple cavities are disposed on the surface of the workpiece according to the pattern of arrangement determined in the first process.

A workpiece machining method that machines a workpiece surface by moving a rotating tool, which has a cutting blade for interrupted cutting of the workpiece surface, relative to the workpiece comprises: a first process of determining the pattern of arrangement of multiple cavities on the surface of the workpiece formed after cutting by the cutting blade; and a second process of determining the tool path of the rotating tool so that the multiple cavities are disposed on the surface of the workpiece according to the pattern of arrangement determined in the first process.

Methods of fly-cutting a workpiece are disclosed, and in methods in which the position of a fly-cutting head or its associated cutting element is known as a function of time. Also disclosed are methods of forming features, such as grooves or groove segments, in a workpiece such as a cylindrical roll. The features may be provided according to one or more disclosed patterns. Articles made using tools machined in the manner described are also provided, such as polymeric film or sheeting that exhibit certain beneficial properties.

Methods of fly-cutting a workpiece are disclosed, and in methods in which the position of a fly-cutting head or its associated cutting element is known as a function of time. Also disclosed are methods of forming features, such as grooves or groove segments, in a workpiece such as a cylindrical roll. The features may be provided according to one or more disclosed patterns. Articles made using tools machined in the manner described are also provided, such as polymeric film or sheeting that exhibit certain beneficial properties.

A control device according to the present disclosure includes: an analysis unit that analyzes instructions by a control program; a corner detection unit that detects, on the basis of the analysis result by the analysis unit, a corner portion at which the direction of a moving route becomes discontinuous; a reference curve creation unit that performs acceleration/deceleration processing on movements before and after the corner portion on the moving route and that creates, as a reference curve, a curve obtained by overlapping the movements by an amount corresponding to a predetermined overlap period; a corner curving unit that creates a moving route curved by inserting, in the corner portion, a curve passing through at least one predetermined reference position on the reference curve; and a curve velocity planning unit that creates a velocity plan relating to movement on the curved moving route. The curve velocity planning unit determines the velocity at the reference position during the movement on the moving route, on the basis of the moving velocity at the reference position on the reference curve.

Provided is a control device for a machine tool that can suitably shred chips in a state without good conformability. A control device for a machine tool which oscillates a tool and a workpiece relative to each other while machining comprises: a comparison unit that compares the oscillation amplitude calculated value calculated by an oscillation amplitude calculation unit and the oscillation amplitude minimum value set by a minimum value setting unit; an oscillation command generation unit that generates an oscillation command on the basis of the oscillation condition and the value of the oscillation amplitude obtained from the comparison results of the comparison unit; and a position/speed control unit that oscillates the workpiece and the tool relative to each other on the basis of a superimposition command obtained by superimposing the oscillation command over a position command.