Couple of questions about some settings.
I am cutting 3/16 mild steel.
Pierce is .190
Cutting speed is 55 ipm.
Cutting height is variable. The THC is setting it at about .120 even though the gcode is set at .025
#1. I am getting a beveled kerf.
#2 I am getting elliptical circles.

The torch is square so that isn't where the bevel is coming from. I suspect its coming from the torch height. I called Ezouter and received some advice about changing a setting in the post file. The setting was "switch offset". Originally the offset was .150. I changed it to .030. I ran the program and when the torch touched the plate and rose up to pierce height I stopped the machine. I measured the height of the torch off the plate and it was .170. The DRO for the z axis read .216 for a difference of .046 I put the value .076 for the switch offset. I'm not sure this was right. I'm not sure if I should have put .046 or .076. I unloaded the g-code from mach3, went back to Sheetcam, ran the post processor and reloaded the g-code. The cutting height was set at .025 in the Sheetcam settings for cutting height. I ran the program and it cut at .125 Not what I expected.
Any thoughts are appreciated.