Just got my Ortur LM2 S2 this week, downloaded lightburn and start testing. My problem is that the extractor fan doesn’t work when the laser is cutting. Can someone help me troubleshoot this, pls.
I’m using the already existing commands, M14/M15. I start the fan first and then the cutting, but whenever the laser starts, the fan turns off. 
Make a very simple box, then examine the GCode to find out what is turning it off.