GRBL Error and Alarm Codes
Below is a list of possible Errors and Alarms which you may encounter while running your GRBL based CNC machine, whether it's one of our Nighthawk family of controllers, or a 3rd-party GRBL controller on something like a laser engraver, pen plotter, or router. In our Commander software you will see the status indicator flash red with ALARM or ERROR when any of the following occur, and you can click on the box for an explanation.
Arming yourself with the knowledge of what the Error or Alarm is you are encountering can help you determine the reason behind it, and the best course of action to resolve it.
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