| 摘要 |
PURPOSE:To shorten a processing time by processing an area between an outside closed curve and an inside closed curve along an outside contour. CONSTITUTION:With a keyboard 3, etc., from a picture 8 on a CRT display 4, an outside contour and an inside contour are inputted. Then, a CPU1, first, obtains an outside nominal contour and an inside nominal contour in accordance with a new control program on a memory 2. Next, at the process where the outside nominal contour is successively off-set to the inside, the crossing of the off-set contour and the outside nominal contour is one place, and then, the OR contour of both is generated. Next, the DIFF shape of both is generated. Thereafter the contour to the DIFF contour to the inside only by the off-setting quantity is generated. Thus, the overlapped path is eliminated, an efficient tool path is generated and a processing time can be shortened.
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