Since you posted your Lightburn Use-xxx macros - I thought I’d repost a reference to this thread
I recently had to add a change to $30 in my Use-Laser macro because something (and I suspect it was a recent version of CM) set it to 24000. Details are in that thread…but I would recommend putting your Lightburn S-Max in $30 in the UseLaser macro — and then set it back to the correct value (based on your spindle) in your UseCNC macro.
- Gary