| 摘要 |
PURPOSE:To facilitate an operation to indicate a desired tool locus by searching an NC command block in response to the presence or absence of an intersecting point between a prescribed closed loop line and a tool locus which is displayed on a screen of an NC command block read out of a memory means. CONSTITUTION:A tool locus is produced by a tool locus drawing means BG and displayed to a CRT when a series of NC command blocks stored in an NC command program memory means MEM are executed. A prescribed coordinate system at the position of a CRT screen designated by a screen position detecting means GS consisting of a cursor shift control means, a cursor position detecting means, a light pen, a light pen indicating position detecting means, etc., i.e., the coordinate position of a drawing coordinate system is calculated by a coordinate position calculating means ZT. An intersecting point detecting means DET decides the presence or absence of an intersecting point between a closed loop line of a prescribed size including said coordinate position and the tool locus displayed at the CRT screen of an NC command block read out of the means MEM. Then the contents of the NC command block having an intersecting point are displayed on the CRT screen in characters by a searching block display means SC. |
