This is where it’s found in fusion 360.
in sheet cam I believe it’s under rules. Hopefully one of the sheetCAM guys will elaborate where the settings are in that software.
I have seen that inches per minute posted for a half inch on the razor weld before on this site.
If you’re using a cut speed of 12 in per minute.
12 * .60 = 7.2ipm. Round 7ipm
12* .40 = 4.8ipm round 5ipm
So during your feed rate optimization for small radii I would lower the speed down between 5-7 inches per minute.
I’m not sure how long your Pierce delay is but I would also make sure it’s fully pierced before moving forward.