Device Settings: GCode

The GCode tab of Device Settings allows for modification of the GCode output for GCode devices. Please see Device Settings: Custom GCode if you are using a Custom GCode device.

Click an option in the image below to jump directly to the relevant section for that option, or scroll down for a list of options and descriptions.

Start / End Scripts¶

Some devices may need additional commands before or after running a job. GCode entered into these boxes will be added to the start or end of each job LightBurn sends to your device.

Use G0 Moves for Overscan¶

Enable this setting to use G0 moves for overscan instead of G1. Some controllers, such as FabCreator Smoothieware boards, have a non-zero power value for their minimum output, causing them to burn during the overscan portion of an engraving. If you find that your laser doesn't shut off completely for overscan moves, try enabling this setting.

Emit S Value With Every G1 Command¶

Enable this setting to have LightBurn specify the output power of the laser with every move command, rather than only when the power level changes. Enable this setting if your laser does not turn back on after travel moves.

Fetch Settings on Connect¶

Enable this setting to have LightBurn read your laser's firmware settings from the controller each time it connects.

Check For Workpiece Offsets on Connect¶

Enable this setting to have LightBurn check whether there are workpiece offsets present when connecting to the controller.

For devices that don't comply fully with GRBL standards, you may need to disable this settings. It will also disable the G54 offset warning.

Troubleshooting¶

• If you aren't seeing a setting you expected to see, check which tab you're in and make sure it's applicable to your laser.

Related Topics¶

• Settings/Preferences
• Machine Settings
• Devices