Hi all! I have just built a laser module on my Ender 3 printer by using the fan port. Now everything seems to work, manual put on and off the laser by command M106 works perfect. But when executing a generated G-code, the laser will not get switched on. I think the problem is that the wrong command is given by the Lightburn software but I can not find the setting… Also the homing button does not work, it will give a message Unknown command $H. Setup is: Laser : GRBL-M3 (1.1e or earlyer) Hope you can help me out!
Try various baud rates and toggling “Enable DTR signal” to see if you can get it to connect. Make sure you’re on the right Port in Laser window.
In Edit->Device Settings there’s an option for “Pointer offset”. Configure there.