> Well, generating an arc as tiny G1 moves seems a poorer solution than > G2 or G3 moves... > There are a number of reasons for doing this: Many CAM packages don't use arcs internally. Breaking arcs into line segments can greatly simplify the maths. When doing 3D work you can quite often get arcs and curves that are not on any standard plane (X-Y, X-Z,Y-Z) They may be cutting curves (i.e not pure arcs)
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