A numerical controller capable of finely designating a restart condition for look-ahead for a program after suppression of the look-ahead is configured to sequentially read out and analyze commands for blocks of a program, perform look-ahead processing to save the result of the analysis in a buffer, and execute the commands for the blocks looked ahead based on the analysis result saved in the buffer, thereby controlling a machine, and is provided with a function of stopping the look-ahead processing when a block into which a code for stopping look-ahead is inserted is read out from the program. The numerical controller is characterized by being provided with a restart condition determination unit, configured to determine whether or not a look-ahead restart condition commanded by the code for stopping look-ahead is satisfied, and a look-ahead preceding restart unit, configured to restart the look-ahead processing if it is determined by the restart condition determination unit that the restart condition is satisfied, and in that the restart condition is a condition related to the state of the machine.

An assembly includes a CNC machining center for machining a board-shaped workpiece, in particular made of wood or of at least one wood substitute, a workpiece support, and a workpiece and/or clamp to be positioned on the workpiece support at least partially manually for securing the at least one workpiece. An augmented reality display device is formed to superimpose a real image of the workpiece support or of a part thereof with information on a specifiable target position and/or target machining contour of the workpiece and/or on a specifiable target position of the clamping means. The augmented reality display device can be worn on the body by a user, who positions the workpiece and/or clamping means on the workpiece support at least partially manually.

An assembly includes a CNC machining center for machining a board-shaped workpiece, in particular made of wood or of at least one wood substitute, a workpiece support, and a workpiece and/or clamp to be positioned on the workpiece support at least partially manually for securing the at least one workpiece. An augmented reality display device is formed to superimpose a real image of the workpiece support or of a part thereof with information on a specifiable target position and/or target machining contour of the workpiece and/or on a specifiable target position of the clamping means. The augmented reality display device can be worn on the body by a user, who positions the workpiece and/or clamping means on the workpiece support at least partially manually.

A method of correcting a track of a cutting edge is provided. With movement of the cutting edge, a point on the cutting edge in contact with the rotation symmetry plane is moved along the cutting edge from a first end portion of the cutting edge to a second end portion of the cutting edge opposite to the first end portion. The correction method includes measuring, by a measurement unit, a shape of the cut and machined rotation symmetry plane, calculating, by an operation unit, an error of the measured shape of the rotation symmetry plane from a target shape of the rotation symmetry plane in a direction of the axial line of rotation, and correcting, by the operation unit, a component in the direction of the axial line of rotation of a track of a point of cutting based on the error.

A method of correcting a track of a cutting edge is provided. With movement of the cutting edge, a point on the cutting edge in contact with the rotation symmetry plane is moved along the cutting edge from a first end portion of the cutting edge to a second end portion of the cutting edge opposite to the first end portion. The correction method includes measuring, by a measurement unit, a shape of the cut and machined rotation symmetry plane, calculating, by an operation unit, an error of the measured shape of the rotation symmetry plane from a target shape of the rotation symmetry plane in a direction of the axial line of rotation, and correcting, by the operation unit, a component in the direction of the axial line of rotation of a track of a point of cutting based on the error.

A servo tuning device adapted to a multi-axis machine tool at least having two linear axes and a rotation axis used for a moving base and a working platform to move relatively along the two linear axes and the rotation axis. The servo tuning device includes a reflection component, a photoelectric sensor and a processor. The reflection component is configured to be disposed on one of the moving base and the working platform and has a reflection surface. The photoelectric sensor has a light-emitting element and a light-receiving element facing the reflection surface. The photoelectric sensor is configured to be disposed on the other one of the moving base and the working platform. The processor records information of relative movement between the photoelectric sensor and the reflection surface for calculating a loop gain value used for tuning a servo setting of the two linear axes or the rotation axis.

A servo tuning device adapted to a multi-axis machine tool at least having two linear axes and a rotation axis used for a moving base and a working platform to move relatively along the two linear axes and the rotation axis. The servo tuning device includes a reflection component, a photoelectric sensor and a processor. The reflection component is configured to be disposed on one of the moving base and the working platform and has a reflection surface. The photoelectric sensor has a light-emitting element and a light-receiving element facing the reflection surface. The photoelectric sensor is configured to be disposed on the other one of the moving base and the working platform. The processor records information of relative movement between the photoelectric sensor and the reflection surface for calculating a loop gain value used for tuning a servo setting of the two linear axes or the rotation axis.

An apparatus to produce a letterbox using a strip of material includes: a bender to receive and bend the strip of material into a desired shape of a letterbox including flanges and notches, and the bender to bend at least one end of the strip of material slightly to produce a slight bent; a processor to measure a first plurality of hole positions on a first end of the strip of material and a second plurality of hole positions on flanges of the strip of material, wherein the first plurality of hole positions on the first end are measured to match a first plurality of holes on a second end of the strip of material, wherein the second plurality of hole positions on the flanges are measured to match a second plurality of holes on a base plate; and a puncher to punch the first plurality of holes on at least one of the first end and the second end of the strip of material according to the first plurality of hole positions, and the puncher to punch the second plurality of holes on the flanges according to the second plurality of hole positions.

An apparatus to produce a letterbox using a strip of material includes: a bender to receive and bend the strip of material into a desired shape of a letterbox including flanges and notches, and the bender to bend at least one end of the strip of material slightly to produce a slight bent; a processor to measure a first plurality of hole positions on a first end of the strip of material and a second plurality of hole positions on flanges of the strip of material, wherein the first plurality of hole positions on the first end are measured to match a first plurality of holes on a second end of the strip of material, wherein the second plurality of hole positions on the flanges are measured to match a second plurality of holes on a base plate; and a puncher to punch the first plurality of holes on at least one of the first end and the second end of the strip of material according to the first plurality of hole positions, and the puncher to punch the second plurality of holes on the flanges according to the second plurality of hole positions.

The invention relates to a method for operating at least one machining apparatus as well as a machining system with at least one machining apparatus. Such a machining apparatus can be a machining apparatus for machining workpieces, in particular panel-shaped workpieces, which are used, for example, in the furniture and component industry.