Provided is a waveform display device that can easily designate an analysis target range just by selecting a location to be analyzed with regard to a tool trajectory. This waveform display device comprises: a positional information acquisition unit that acquires, from a control device that controls a machine tool, motor positional information for a drive shaft of the machine tool during workpiece machining; a shaft information setting unit that sets shaft information indicating the shaft configuration of the drive shaft of the machine tool; a tool trajectory display unit that calculates the trajectory of a tool tip point during workpiece machining by a tool mounted on the machine tool on the basis of the motor positional information and the shaft information and displays the trajectory as a waveform; an analysis target setting unit that sets an analysis target position relating to the trajectory of the tool tip point; an analysis target range generation unit that generates and displays an analysis target range containing a solid body including the set analysis target position; and a measurement point sorting unit that sorts out and displays a measurement point included in the analysis target range generated by the analysis target range generation unit from within the trajectory of the tool tip point.

A numerical controller includes a machining program creation unit for receiving an input of a machining program including a cycle command, a tool path creation unit for creating a plurality of tool paths based on the machining program, a display unit for displaying the machining program and the plurality of tool paths, and a correspondence relation management unit for recording a relation between an argument of the cycle command and the plurality of tool paths in an information table, wherein the correspondence relation management unit receives a selection of a selected tool path corresponding to one of the plurality of tool paths, and specifies an argument of the cycle command corresponding to the selected tool path with reference to the information table, and the display unit displays the specified argument in a different form from a form of another argument in the machining program.

A tool track display device includes a position information acquisition unit which acquires position information of at least one drive axle from a numerical control device and a position sensor provided on the at least one drive axle, a tool coordinate calculation unit which calculates coordinate values of the tool based on the position information of the at least one drive axle and information regarding the mechanical structure of a machine tool, a display attribute modification unit which modifies the display attribute of the tool track in accordance with the motion direction of the tool, and a display unit which displays the tool track based on the coordinate values of the tool calculated by the tool coordinate calculation unit and the display attribute modified by the display attribute modification unit.

Provided is a display device that can automatically identify and display a vibration site and a vibration axis using empty processing. The present invention is a display device 1 that comprises: a trajectory error calculation unit 13 that, on the basis of a movement trajectory of a tool based on actual positions and a movement trajectory of the tool based on command positions, calculates time-sequence data of trajectory errors of the tool; an amplitude calculation unit 14 that calculates the amplitudes of frequency components by frequency analysis of the time-series data of the trajectory errors of the tool; a vibration detection unit 15 that detects a frequency component for which the amplitude of the frequency component exceeds a prescribed threshold value and detects a position corresponding to the detected frequency component as a vibration site; a vibration axis determination unit 16 that, by frequency analysis of time-sequence data of position deviations or torque commands of axes within a time range corresponding to the detected frequency component, determines an axis for which the amplitude of the frequency component identical to the detected frequency component is greatest to be a vibration axis; and a display unit 17 that displays the detected vibration site on the movement trajectory and displays the axis determined to be the vibration axis.

A numerical controller includes a machining program creation unit for receiving an input of a machining program including a cycle command, a tool path creation unit for creating a plurality of tool paths based on the machining program, a display unit for displaying the machining program and the plurality of tool paths, and a correspondence relation management unit for recording a relation between an argument of the cycle command and the plurality of tool paths in an information table, wherein the correspondence relation management unit receives a selection of a selected tool path corresponding to one of the plurality of tool paths, and specifies an argument of the cycle command corresponding to the selected tool path with reference to the information table, and the display unit displays the specified argument in a different form from a form of another argument in the machining program.

Provided is a waveform display device that can easily designate an analysis target range just by selecting a location to be analyzed with regard to a tool trajectory. This waveform display device comprises: a positional information acquisition unit that acquires, from a control device that controls a machine tool, motor positional information for a drive shaft of the machine tool during workpiece machining; a shaft information setting unit that sets shaft information indicating the shaft configuration of the drive shaft of the machine tool; a tool trajectory display unit that calculates the trajectory of a tool tip point during workpiece machining by a tool mounted on the machine tool on the basis of the motor positional information and the shaft information and displays the trajectory as a waveform; an analysis target setting unit that sets an analysis target position relating to the trajectory of the tool tip point; an analysis target range generation unit that generates and displays an analysis target range containing a solid body including the set analysis target position; and a measurement point sorting unit that sorts out and displays a measurement point included in the analysis target range generated by the analysis target range generation unit from within the trajectory of the tool tip point.