To flash a newer version of GRBL to your laser, you'll need to download Arduino IDE. Not doing so will cause flashing errors later in this process. Copy those to a text editor like Notepad or TextEdit and save for safekeeping.Īt this point, please close LightBurn. This gives you a further verification step to make sure the laser's behavior is as intended after flashing. Using the Console, you can enter '$$' to get the GRBL values of the machine to supplement those from the Machine Settings window. This allows you to save a backup of the laser's configuration that's know to work before we flash firmware and reset all of those settings.

In this window, you'll want to click 'Save to file'. In LightBurn, use the macro created in the Limit Switch Guide to apply the needed limit switch firmware changes, and afterwards use the Edit -> Machine Settings dialog. Plug in your laser's power and USB, connect it to your computer, and open LightBurn. Read the whole guide, start to finish, before trying to flash your machine. Flashing your firmware incorrectly can damage your machine. To successfully flash your laser, high attention to detail is needed.

Lightburn mach3