Issue description

• When operating your S1, you might encounter a flame alarm with an error message "Flame detected - xTool S1" (refer to the image below), despite no actual fire or visible flame inside the machine.
• Specifically, the laser device's indicator light flashes red with the buzzer sounding and the laser module dashes back to its home position.
• If this issue occurs, please refer to this troubleshooting guide for advice.

Possible causes

• Overheating of the laser module;
• Dirt on the flame detection sensor of the laser module;

#1 Clean the flame detection sensor

• The flame detection sensor is located inside the laser module (refer to the image below). Dirt or taint on this sensor will result in a flame detection exception, thus leading to false flame alarms.

• Please uninstall the laser module with a 2.5 mm hex screwdriver by following the video tutorial below to check if the sensor is tainted or dirty.
• Use a dry cotton cloth or cotton swab to clean the flame detection sensor.
• It is recommended to clean the sensor on a regular basis after heavy use to avoid dust build-up, which might compromise the sensor sensitivity, leading to false flame alarms.
• After cleaning, reboot both S1 and xTool Creative Space (XCS) to inspect if the error message persists.
• If the issue remains unsolved, proceed to the next step.

#2 Check the laser module fan and temperature

• Observe the laser module fan's operation (refer to the image below):
  • If the laser module fan makes a strange noise or stutters, this indicates the fan may be dirty. Please clean the laser module fan by following the video tutorial below.
  • If the fan has stopped working entirely, this hints at a broken fan. Please replace the laser module fan to resolve this error message by following the video tutorial below. For a replacement, please contact xTool Customer Service.

• Check the Laser Module Temperature:
  • Gently touch the surface of the laser module to check for overheating.
  • If the laser module is overheated, open the lid to allow better cooling and let it rest for approximately 5 minutes.
  • After cooling, reboot the machine and run xTool Creative Space (XCS) to check if the issue persists.
  • The laser module fan is designed to dissipate heat during normal operation. Overheating can mistakenly trigger the flame sensor.
  • If the issue remains unsolved, proceed to the next step.

#3 Export logs & GCode files

1. If the issue persists after following the above solution, please forward your laser device's logs and GCode files from its SD Card to xTool Customer Service at support@xtool.com. For more details, refer to this tutorial: Export the Gcode File and Working Log from the SD Card.
2. After the flame alarm occurs, turn off the machine immediately and extract the log.
3. For users who wish to continue their laser processing, proceed to the ad hoc solution.

⚠️ Important: Avoid restarting the machine before exporting the log, as this will overwrite the previous log files.