Flame Sensor Replacement for Ray5 10W / 5W

The flame sensor is an important safety component in the LONGER Ray5 laser engraver. It helps detect unexpected flames during operation and activates the machine’s safety protection system.

If the flame sensor becomes damaged or stops working properly, the laser engraver may lose this safety detection function. This guide explains how to replace the flame sensor on the LONGER Ray5 10W and Ray5 5W models.

The replacement process is also similar for other Ray5 versions. For the Ray5 40W, only the flame sensor needs to be replaced. Before starting, make sure the machine is powered off and prepare the required tools.

Tools Required

M5 hex wrench
M2 hex wrench
M2.5 hex wrench
Replacement flame sensor

Step-by-Step Flame Sensor Replacement

1. Remove the Control Box

Use an M5 hex wrench to loosen the screws securing the control box. Carefully remove the control box from the machine.

2. Open the Control Box

Use an M2 hex wrench to loosen the screws on the back panel.
Remove the panel to access the internal components.

3. Disconnect Internal Wiring

Locate the cables connected to the mainboard. Gently disconnect or unscrew them as needed to access the sensor components.

4. Replace the Flame Sensor

Use an M2.5 hex wrench to loosen the screws securing the flame sensor (and motion sensor if applicable).

Remove the faulty sensor
Install the new flame sensor in the same position
Secure it using the original screws
Reconnect all previously removed cables

Note: For Ray5 40W models, only the flame sensor needs to be replaced.

5. Reassemble the Machine

Close the control box and secure the back panel with the M2 hex wrench
Reinstall the control box onto the machine
Ensure all components are properly secured

Important Notes

Handle internal components carefully to avoid damaging connectors or the mainboard
Ensure all cables are correctly reconnected before powering on
Do not overtighten screws to prevent damage to the sensor housing

Conclusion

Replacing the flame sensor is an important maintenance step for keeping your LONGER Ray5 laser engraver operating safely. A properly working flame sensor helps maintain the machine’s safety protection function during engraving.

By following this replacement guide carefully, users can complete the sensor replacement process and restore normal flame detection performance. Regularly checking safety components can help improve machine reliability and support long-term engraving performance.