Negative kerf moves to positive if shapes are within a border

[bLouChip (Lou Cipriano)]

I believe LB is working as designed in the case you describe as the original problem. See this post for an explanation and how you can cut as you desire with correct-side kerf offset with just one file or run.

Optimization, cut Offset, cut Lead-in, Layers subtilty

Often times when building a design for plasma cutting I have a need to create a separate layer simply to change the tool path lead-in length from the optimal 5-4mm to something less such as 3-2, in order to fit the lead-in inside a skinny shape while continuing to use a 90deg lead-in angle. 90deg is best for plasma lead-ins since it minimizes a blowout when the shape cut finishes by ensuring there is maximum metal remaining at the cut termination corner formed by the lead-in; the arc is always l…

Cheers,
Lou