Hello, 

Recently purchased Xtool S1 and love it.  Machine works great in XCS but I'm very familiar with Lightburn and would like to use it as well.  I added machine and imported prefs downloaded from Xtool as per your user guide.  Latest version of LB, firmware updated on S1.

When I try to engrave circles or circular objects the laser slows down by about 50% or so during the last few lines of the engraving.  This causes a deeper burn at the top of the engraving.  This only happens in LB, XCS engraves perfectly.  Squares work fine, material test cards work fine as well in LB.  Constant power mode is disabled.  

Any thoughts?