More conditions of geometric elements should be complete and accurate in the programming, the programmer must fully grasping the geometric elements of composition parts contour parameters and the relationship between geometric elements.
Because at the time of automatic programming to outline all of the metal parts geometry elements are defined, the manual programming to calculate the coordinates of each node, no matter what is not clear or uncertain, programming can be performed.
But due to component design personnel in the design process to be thoughtless or ignored, often appear parameter is not complete or not clear, such as arc and straight line, arc and arc tangent intersection or phase is near.
So when the review and analysis of drawings, must carefully, found the problem timely contact designers dimensioning shall accord with the characteristics of nc machining in CNC programming, all the size and position of point, line and plane is programming the origin as a benchmark.
So best directly coordinates are given in detail drawing size, or as far as possible to the same benchmark note size.
Reliable positioning base in nc machining, the machining operations tend to be concentrated, with the same reference positioning is very important.
So often you need to set up some auxiliary datum, or add some process convex platform on the blank.
Unified geometric type or size parts of shape, inner chamber had better use unified geometric type or size, so that we can reduce the changeover times, may also use of control program or special program to shrink given yuan is a shenzhen machinery parts
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