Find the problem by what you see, or look up the alarm or message shown on the screen or in the software. Each group opens on its own page.
The laser does not emit a beam, cutting is weaker, or engraved lines and cut edges look wrong.
Autofocus or homing fails, movement is abnormal, limit errors persist, or engraving shapes and rotary output are wrong.
The machine does not respond, a job stops or will not start, or software, app and USB connections fail.
The camera is not recognized, positioning is inaccurate, or LightBurn camera calibration fails.
The laser keeps running with the door open, LEDs stay off, flame alarms repeat, air or fire systems fail, or smoke builds up.
Look up the exact text you see. The alarm numbers appear in AtomStack Studio, LightBurn and other GRBL software.
| Message | Where you see it | What it means | What to do |
|---|---|---|---|
| Disconnected | Software, when engraving stops | The software reports a disconnected machine. | Stops Mid-Job |
| disconnected | Software, when engraving stops | The software reports a disconnected machine. | Stops Mid-Job |
| limit switch triggered | Software, during autofocus troubleshooting | A limit switch has been triggered. | Autofocus Hits Material |
| Alarm 1 | Software | Limit switch triggered | Limit Error Persists |
| Alarm 9 | Software | Homing failed | Homing Fails |
| Alarm 12 | Software | Flame detection triggered | Repeated Flame Alarms |
| Alarm 13 | Software | Door opening detected | Door Open, Laser Runs |
| Alarm | Type | Solution |
|---|---|---|
| Alarm 1 | Limit switch triggered | Check whether the limit switch has been triggered, and verify the size of the engraving file. If an alarm is triggered even when the engraving position is at the center of the working area, the limit switch may be faulty. Refer to the Kraft Manual Limit Switch Trigger Check Video for troubleshooting. |
| Alarm 9 | Homing failed | Troubleshoot according to the Kraft homing failure solution. |
| Alarm 12 | Flame detection triggered | Carefully observe whether the material being engraved or cut has caught fire. If it is a false alarm, follow the solution for "Kraft repeatedly triggers the flame detection alarm." |
| Alarm 13 | Door opening detected | The enclosure door may be open or the limit switch may be malfunctioning. Refer to the solution for "The laser does not stop operating even when the Kraft enclosure door is open." |
Related problems: Limit Error Persists · Homing Fails · Repeated Flame Alarms
If the problem persists, contact customer service with the troubleshooting details requested for that problem.