@anssi said:
I haven't noticed any difference. In 2D exports arcs and curves are exported as straight polyline segments.
Anssi
Actually, Sketchup Arc is recognized as Arc in AutoCAD and Curves as Polylines. But it must be something... on the way the coordinates are stored, or something about the vertices, because as I said, some of the Arc elements get mirrored about origin of the drawing when I import the DXF into that CNC software.
So...that software (NC-HOPS) is expecting something from the DXF and AutoCAD dxfs offer, but Sketchup exported DXF does not, or offer differently.