Movement Protection Triggered on Ray5 10W and Ray5 5W

The Ray5 10W and Ray5 5W include flame and motion sensors to help protect the engraving process. In some cases, these sensors may trigger an alarm because of environmental conditions, sensitivity settings, or hardware contact.

This guide explains the common causes of flame sensor and motion sensor alarms and shows how to check and adjust the related settings.

Flame Sensor Alarm

The flame sensor can be easily triggered. When it is activated, the LightBurn console will display Alarm 3. This can happen for several reasons, including ignition during use, strong light exposure, incorrect settings, short circuits, or even sensor damage.

To avoid unnecessary alarms, it is important to maintain a proper working environment. Avoid open flames during engraving. If an open flame occurs, reduce the laser power immediately to prevent triggering the sensor.

Environmental lighting also plays a role. The engraving machine should be placed in a normal indoor environment and kept away from strong light sources such as flashlights or direct sunlight, as these can interfere with the sensor.

If the flame sensor is still triggering, you can adjust its sensitivity. Open LightBurn or LaserGrbl, connect your machine via USB, and enter the following command in the control panel:

This command lowers the flame sensor trigger threshold. If the issue continues, you can further reduce the value until the sensor behaves normally.

In some cases, the issue may be caused by a hardware contact. If the flame sensor is triggered at the beginning of engraving, check whether the sensor’s metal pins are touching the metal casing. The flame sensor is a black cylindrical probe located at the back of the RAY5 control box. Carefully adjust its position to prevent contact.

If necessary, you can temporarily disable the flame sensor by entering:

To enable it again, use:

Motion Sensor Alarm

The motion sensor is designed to detect unexpected movement during operation. However, it may also trigger due to machine instability, incorrect settings, or sensor issues.

Make sure your engraving machine is placed on a stable and level surface. Any vibration or movement during operation can cause the motion sensor to activate.

If the sensor is too sensitive, you can adjust its trigger threshold through software. Open LightBurn or LaserGrbl, connect your machine via USB, and enter the following commands:

These commands reduce the sensitivity of the motion sensor and help prevent false alarms.

If the motion sensor continues to trigger at the start of engraving, it may indicate a hardware issue. In this case, you can disable the motion sensor by entering:

To turn it back on, simply send: