| 摘要 |
A numerical controller capable of reducing movement of the line of sight between a video picture and character information. The numerical controller, which controls a machine tool, comprises a video camera set in the machine tool, display image preparing means for forming display image data to be displayed having character information superposed thereon on the video picture, using video image data and internal data of the numerical controller, and a display device for displaying the display image data. Information from the numerical controller is displayed superposed, depending on the then operating conditions, on a picture of a machining state shot with a camera set in the machine tool. The character information is displayed superposed on the video picture, and the display position of the character information is situated close to the position of the video picture. By doing this, movement of the line of sight between the video picture and the character information is reduced. By previously setting camera parameters for the character information, moreover, video pictures of those parts of a workpiece and the machine tool which are associated with the character information are displayed.
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