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Steinwerks
in reply to: Anonymous

Actually R values can create an arc error if the start point is off even a couple of tenths. The bigger the arc, the worse interpolation will be. This has been documented in 2D Contour with roughing passes in all three packages. You're better off using IJK amd post updates reflect this suggestion if you look at the notes on the post library (see the Haas post as the easiest example).
Neal Stein

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