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# Common Grbl setups
If you have a GCode-based system, like a Shapeoko, Eleksmaker, X-Carve, or Acro system, you might need to make some simple changes to get the most from LightBurn.
#### 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](DeviceSettings.md#s-value-max).
- You might need to enable "Laser Mode" if you have GRBL 1.1f or later (\$32=1).
- If your machine uses negative workspace coordinates you'll need to apply a workspace offset (G10 L2 P1 xx yy) and set your machine status reporting to be relative to the workspace origin, not the machine origin (\$10=0).
#### Grbl Flavors
Grbl firmware was originally designed for CNC machines and 3D printers, with laser support added more recently. It is highly configurable, and this is both a blessing and a curse. The "standard" way a CNC machine is configured is somewhat different than the way laser machines often are. Luckily this is easy to change, and easy to switch from one to the other.