OHHH… @Cletus …are you out there…some old fashioned Mach3 question for you here…
I think you should try wiping Mach3 and reinstalling it. Can’t fathom why it’s doing this.
That said, I do not use conFusion360, I use AutoCAD 2007 and I post process in SheetCam. It may also very well be something daffy in Fusion360’s post processing.
Meanwhile I will sleep on it a bit.
My Mach3 General Logic Config is exactly as yours is, except that “G04 Dwell in ms” is selected… still looking, things like this keep me awake at night 
EDIT
Actually two differences:
Sorry I guess new members only get 15 posts a day. So I couldn’t get back on last night
I removed and reinstalled no change.
I added the G91.1 bak to the line in the configuration. No change.
Then changed Ij to Inc and it all works now…
I was cutting stuff last night but couldn’t let you guys know!!!
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That’s great news!!! Thanks for hangin’ in there with us… Sometimes, it’s just the littlest things!! 
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GREAT NEWS! 
