I was playing arround with G41 and G42 in a simulation and I think I might have found a bug with the Naive CAM Detection. The shape I was simulating was a semi circle with the start/end point on the flat side and a single G2 arc move connecting the end points. The simulation behaves strangely. With a tool radius of .125" and .25" and staight G64 the tool path precisely followed the path (white and red lines over lapped). With G64P0.001, the same. The expected behavior is cutting a straight line parallel to the programed line offset the tool radius, cut an arc around that end point to connect to the offset path of the commanded arc cut. all good right. With G64P0.001Q0.2 there is odd behavior. It moves in a straight line from the beginning of the compensated straight line cut to the begining of the compensated arc cut completely ignoring the compensated end point of the straight cut. I know having such a large Q setting is a little odd. I also see simular behavior with G64P0.2 (no Q specified, same as Q0.2) only with more rounded corners. I seem to see the odd behavior when ever Q is about 2/3 or more than the tool diameter.
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