I have fitted a laser to my cnc router, I am using an Xpro V4 with grbl 1.1h. I have changed $32= 1 $ 30=255 and $31=0. I've downloaded lightburn and openbuilds controller but I'm having the same issue with what ever I use. When I power the laser up to cut a file it moves around exactly as it should but it wont switch in and out. I have connected to the spindel output and anolog earth. The spindle led flashes away when the file is running but has no affect on the laser. If I reverse the connections between pin 11 and earth the laser switches with every flash of the led. Only thing is it switches on for the travel and off for the image!! I've been pulling my hair out I just cant seem to crack it.. Any help with this issue will be gratefully received. Many thanks in advance.