In corel, you can use DXF TOOLS to export DXF with arcs (not sure but may not always produce tangent continuous arcs)
The question is, how to get from vectors to arcs. Ultimately DXF with (tangent) arcs is the best, and arcs work the same on all machines.
And machines with low acceleration can't follow segments as smooth as they can follow arcs. Some machines, like old moving bed platforms can't handle segmented curves because they cause colossal machine vibration. Some, like Mach3 machines, have constant velocity settings to make segmented curves work ok. Some machines work better with arcs because they run smoother. CAD software uses arcs, vector graphics software does not use arcs, which is why DXF curves come out as either segments or splines. Ideally, for CNC, you want DXF with arcs (not splines or segments), and the arcs should be tangent continuous (smooth). I'm not sure about inkscape, but corel's DXF is either segmented (curves are lots of short line segments) or splines (which only work right in some CAM software sometimes) Inkscape is free and will do both conversions JPEG to DXF is a raster to vector conversion, requires clean source images and extensive vector editing/clean-up (before and) afterwardsĪI/EPS to DXF is a vector to vector conversion, output is (sort of) equivalent to input That's actually a very complicated question, and there is no easy answer.
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