Waveform display device

A waveform display device comprising a processor configured to perform following operations including:

• acquiring, from a control device that controls a machine tool, motor position information on a drive shaft of the machine tool;
• setting shaft information indicating a shaft configuration of the drive shaft of the machine tool;
• based on the motor position information acquired and the shaft information set, calculating, using coordinates of a plurality of tool tip points along traveling directions of tools attached to the machine tool, distances in a perpendicular direction of the plurality of tool tip points with respect to a reference surface, which is a machining surface of a workpiece, calculating paths of the plurality of tool tip points by a line connecting each of the plurality of tool tip points, and displays the calculated paths as a plurality of waveform lines parallel to each other which represent unevenness information of the machining surface of the workpiece;
• setting an analysis object position related to the paths of plurality of tool tip points displayed as a line segment connecting one or more points or a plurality of points for the plurality of waveform lines parallel to each other;
• generating and displaying a three-dimensional analysis object range including the analysis object position set;
• and
• selecting a measurement point included in the analysis object range generated from the paths of the plurality of tool tip points, and enlarging and displaying the selected measurement point.