Display device displaying surface roughness of workpiece

A non-transitory computer-readable storage medium storing a program that is executed by a computer that comprises a processor of a display device, the program being executable to cause the computer to perform operations comprising:

• generating tool path information regarding a tool path, for turning in which a relative cutting feed speed between a workpiece and a tool changes;
• calculating data regarding surface roughness of the workpiece, based on a feed speed along a relative cutting feed direction for the workpiece and the tool and a shape of the tool;
• and
• controlling and causing a display unit to display data regarding the surface roughness at an arbitrary designated position on the workpiece, based on the calculated data regarding the surface roughness and a preset display setting,
• wherein calculating data regarding surface roughness of the workpiece includes calculating data regarding surface roughness of the workpiece based on the tool path information,
• wherein controlling and causing the display unit to display data regarding the surface roughness includes displaying data regarding surface roughness of the workpiece at designated arbitrary phase,
• wherein designating the arbitrary phase includes designating a length direction of the workpiece together with a phase of the workpiece and/or designating a distance over which the surface roughness is measured as a range to be used for the calculation of the surface roughness.