Yes, it is literally the first thing we tell you to check in the ‘Common Grbl setups’ section of the documentation: Common Grbl Setups - LightBurn Software Documentation
Short version
- You might need to adjust your spindle max RPM value (
$30) to match the LightBurn default (1000) or vice versa. The value in LightBurn is called “S-Value Max”, in the Device Settings.
