March 2020 Guide to the configuration parameters of a GRBL-based laser marker. By arkypita, developer of the LaserGRBL software
![GRBL setting and wiring from my arduino cnc shiled to my CO2 laser power supply - Motors, Mechanics, Power and CNC - Arduino Forum GRBL setting and wiring from my arduino cnc shiled to my CO2 laser power supply - Motors, Mechanics, Power and CNC - Arduino Forum](https://europe1.discourse-cdn.com/arduino/original/4X/f/b/c/fbc3845bcc6741e7af1b62977c0d03978598b974.jpeg)
GRBL setting and wiring from my arduino cnc shiled to my CO2 laser power supply - Motors, Mechanics, Power and CNC - Arduino Forum
![TTL LASER with Arduino UNO and how to add $30=1; $31; $32 to Grbl Laser · Issue #360 · arkypita/LaserGRBL · GitHub TTL LASER with Arduino UNO and how to add $30=1; $31; $32 to Grbl Laser · Issue #360 · arkypita/LaserGRBL · GitHub](https://user-images.githubusercontent.com/16980026/40316485-68ff5e0e-5d16-11e8-9b06-287f2bf5b224.jpg)
TTL LASER with Arduino UNO and how to add $30=1; $31; $32 to Grbl Laser · Issue #360 · arkypita/LaserGRBL · GitHub
![TTL LASER with Arduino UNO and how to add $30=1; $31; $32 to Grbl Laser · Issue #360 · arkypita/LaserGRBL · GitHub TTL LASER with Arduino UNO and how to add $30=1; $31; $32 to Grbl Laser · Issue #360 · arkypita/LaserGRBL · GitHub](https://user-images.githubusercontent.com/16980026/40550923-647ecf66-6033-11e8-9101-3c4eefebac6b.png)