5-11 No Laser Beam Output / The Laser Won't Fire / No Laser Pulse

There are many potential reasons why the laser may fail to fire, including a decrease in laser tube performance, damage to the Laser Power Supply Unit (Laser PSU), or system failure. Please follow the steps below to troubleshoot the issue.

Possible Causes

Tools

Step 1

Please watch the video and determine if the situation is similar to your machine. If there is no laser output and a loud popping sound occurs during operation, it means the laser tube is no longer usable.

Please confirm your situation and take the next step:

Step 1.1

Please check if your situation matches the descriptions below.

• No laser output at low power of about 10%.
  
   
• Laser output is too strong at low power. (Engraving is too deep or results in cutting, etc.)
  
   

Please confirm your situation and take the next step:

Step 1.2

Confirm if the LED on the Laser Power Supply is constantly lit.

• Please loosen the T8 screws on the side of the machine to open the side cover.

• Please refer to the photo below to check if the Laser Power Supply LED is constantly lit without flickering when the power is on.
  
   

Confirm your result and determine the next action:

Step 2

Confirm if the power and speed settings in the software are correct.

Please confirm your situation and take the next step:

Step 2.1

Double the power setting, send the job, and observe if the laser fires.
(For example, if your power was 15%, increase it to 30% and send the job.)

Please confirm your situation and take the next step:

Step 3

Turn off the machine, open the back cover, and apply a new piece of double-sided tape to the first reflective mirror.
After applying, proceed to Step 3.1.

• Use a screwdriver to loosen the screws on the back of the machine, then open the back cover.
  
  
   
• Apply tape to the first mirror so that it is at a 90-degree angle to the laser beam.
  
  
   
• Close the back cover.
  

Step 3.1

Perform a laser pulse and check for burn marks on the tape. (Please refer to the examples to judge the tape test results.)
For HEXA RF 30W, please perform 5 pulses.
For HEXA RF 60W/80W, please perform 2 pulses to avoid igniting the tape.

A. Turn on the machine and adjust the beam expander on the laser tube to "3".
B. Close the machine lid.
C. Click "Action" and wait for homing to complete. (Ensure the lid icon is closed, otherwise the pulse will not trigger).
D. Click "Laser Pulse" below.
E. Click once > Pulse once, and so on.
F. Check the tape.
⚠︎ Always ensure the lid is closed when firing the laser.

Laser Pulse Test Result Examples

Good Example - Round and clear spot	Bad Example - Weak, hollow, or irregular

Please confirm your situation and take the next step:

Step 3.2

• Apply a new piece of tape to the first mirror as shown in Step 3.

• For safety, set the power to 0% to ensure no laser pulses are generated during testing.

  
  

• The lid magnetic sensor is embedded within the LED light inside the machine.
  (This video was filmed with HEXA, but the structure is the same as Beambox 2.)

• The lid sensor has two indicator lights that should be constantly ON.
  (Filmed with HEXA; same structure as Beambox 2.)
  
  

• Place the magnets close to the two LED lights. When the magnets are detected, the lights should become "brighter." When both LEDs detect magnets simultaneously, a "lid closed" signal is sent to the system, and the icon on the panel will change.
  Note: The LEDs are polarity-sensitive. You may need to flip the magnet or approach the LED from the other side.

   

• After attaching the magnets to the lid sensor, close the lid.
  

• Change the power setting back to 100%, confirm the icon shows as closed,
  then perform a laser pulse. (Refer to the  examples to evaluate the burn marks.)
  For HEXA RF 30W, perform 5 pulses.
  For HEXA RF 60W/80W, perform 2 pulses to avoid ignition.
  

Please confirm your situation and take the following action:

Step 3.3

• Apply a new piece of double-layer tape to the first mirror as shown in Step 3.

• For safety, set the power to 0% to ensure no laser pulses are generated during testing.

  
  

• Open the back cover and locate the back cover sensor.

• The back cover sensor has two red LEDs that are constantly ON.
  
   

• Bring two external magnets close to the two LED lights. When the magnets are detected, the lights should become "brighter." When both LEDs detect magnets simultaneously, a "lid closed" signal is sent to the system, and the icon on the panel will change.
  Note: The LEDs are polarity-sensitive. You may need to flip the magnet or approach the LED from the other side.

   

• After placing the magnets, close the back cover.
  

• Change the power setting back to 100%, confirm the icon shows as closed,
  then perform a laser pulse. (Refer to the  examples to judge the burn marks.)
  For HEXA RF 30W, perform 5 pulses.
  For HEXA RF 60W/80W, perform 2 pulses to avoid ignition.
  

Please confirm your situation and take the following action:

Step 4

Please confirm your situation and take the following action:

Step 5

• Apply a new double-layer tape to the first reflective mirror.
   
• Increase the power ratio to 150% and perform a pulse to see if the burn mark becomes more visible.
  (Refer to the examples to evaluate the result.)
  For HEXA RF 30W, perform 5 pulses.
  For HEXA RF 60W/80W, perform 2 pulses to avoid ignition.
  

Please confirm your situation and take the following action:

Contact Support

Please follow the instructions in the link below to correctly report the issue to your local dealer or the FLUX support team. [Contact Customer Service]

*The information collected in this article, such as photos or videos showing your machine's problem, will need to be shared with the dealer or FLUX support staff.

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