On LightBurn, press the wrench icon on the top toolbar. A dialog box should appear with the title “Device settings for GRBL.”
Wrench icon on LightBurn
Make sure that:
- “S-value max” is set to 255 – Setting your S value max correctly will ensure you have access to 100% of your laser’s power. This value should always match your maximum spindle speed in gSender (more details in gSender Settings)
LightBurn S-value max setting
- “Origin” is set as the bottom left corner – If you change this, it will flip your work surface when exporting your g-code so it is best to stick with this setting
Setting origin of projects on LightBurn
- Under “Z Axis Control,” toggle “Enable Z axis” to ON – This will allow the machine to move down during laser cutting operations.
Enable Z axis on LightBurn
- Press “OK” to save your settings