Plasma arc's look faceted when cut, not sure why?

[Web Goblin]

Unless you have some mechanical issues with your machine then I would say that this letter was drawn as a polyline.
Most post processors really don't like polylines. What they do is break them down in to short arcs or lines and then create the code for them leaving you with either a crap contour, a very long program or both. When drawing in cad for cutting the best things to use are lines, arcs and circles. Your post processor will easily understand them and create the correct code. I have seen straight lines drawn as polylines broken down into hundreds of lines of code and industrial controllers struggling to run them correctly. You could try saving the dxf as a v12 dxf and then try it again to see if that helps.

[marbles]

Unless you have some mechanical issues with your machine then I would say that this letter was drawn as a polyline.

Thanks for thoughts. I suppose what i should do is run a file which is exported as dxf 12 to confirm or eliminate that. On that letter 'a' it appears to do some of the curves fine but is cutting corner on some of the tighter radius. This could be a mechanical issue, as the x axis is extended quite some way and something is causing a harmonic micro wobble, for want of a better description. I'd certainly be interested to hear back about my Mach3 settings as they might be an issue.