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

[JAZZCNC]

Sorry been busy but like been said Clearly there are no G2/3 arc moves only G1 so it's the code not machine or Mach3.

Doesn't matter if you convert to Arc's in CAD or CAM if the post can't process them. Often if standard Post can't deal with Arcs there'll be separate post which does.