I’m going to move this topic to Beyond the Manual.
@tapoutms3, you can try the settings below for Engraving on glass:
Power 100%
Speed 850
LPI 340
You cannot cut all the way through glass with a laser though. Make sure you use a film of liquid dish soap, masking tape or a damp paper towel secured over the glass to keep it from cracking when you are engraving it.