The cooling fan inside the laser module plays an important role in maintaining stable engraving and cutting performance. During long-term use, smoke and dust from laser processing may build up inside the fan and reduce airflow. In some cases, the fan may become noisy or stop working.

For LONGER B1 series laser engravers, cleaning or replacing the cooling fan can help restore proper airflow and maintain reliable operation. This guide explains when fan maintenance is needed and how to replace the fan correctly.

Compatible Models

This fan recovery and replacement guide applies to the following LONGER B1 laser engravers:

If your machine frequently performs engraving or cutting tasks, especially with materials that produce smoke or dust, regular fan inspection can help maintain stable performance.

Why Clean or Replace the LONGER B1 Fan?

The cooling fan helps remove heat generated during laser operation and supports stable performance of the laser module. Over time, users may notice these issues:

  • Reduced airflow: Dust and smoke residue may affect fan performance.
  • Increased fan noise: Buildup or wear may cause unusual sounds.
  • Fan stops spinning: A damaged fan may need replacement.
  • Laser module becomes hot: Poor cooling may affect normal operation.

Cleaning the fan or replacing it when necessary helps restore proper airflow and maintain the cooling function of the laser module.

Required Replacement Fan Specifications

If the original fan is damaged and needs replacement, use a fan with the correct specifications:

  • Fan size: 60 mm × 60 mm
  • Voltage: 24V
  • Current: 0.40A

Using a suitable replacement fan helps maintain the expected cooling performance of the LONGER B1 laser module.

How to Clean or Replace the LONGER B1 Fan

Before starting maintenance, disconnect the laser module and handle internal components carefully.

Step 1: Disconnect the Laser Module

  1. Disconnect the power cable from the laser module.
  2. Remove the air assist connection.
  3. Remove the laser module from the machine.

This provides access to the internal fan.

Step 2: Remove the Laser Module Cover

  1. Remove the four screws on the laser module cover.
  2. Carefully remove the cover.

The internal cooling fan will now be visible.

Step 3: Disconnect the Fan

  1. Gently lift the fan.
  2. Disconnect the fan connector from the laser module.

Be careful when handling the connector and internal parts.

Step 4: Clean or Replace the Fan

Cleaning the Fan

If the fan is still working:

  • Remove dust and smoke residue from the fan.
  • Check that the fan blades can rotate normally.

Replacing the Fan

If the fan is damaged or no longer spins: Use a replacement fan with:

  • 60 mm × 60 mm size
  • 24V voltage
  • 0.40A current

A correct replacement restores normal airflow inside the laser module.

Step 5: Reassemble the Laser Module

After cleaning or replacing the fan:

  1. Reconnect the fan connector.
  2. Place the fan back into position.
  3. Install the metal cover.
  4. Reinstall the laser module.
  5. Reconnect all cables.

Make sure all connections are secure before testing.

Step 6: Test the Laser Module

After completing the maintenance:

  1. Perform an ignition test.
  2. Run an engraving test.
  3. Check whether the laser module works normally.

If the fan operates correctly and the laser module remains stable, the replacement process is complete.

Common Questions or Issues

Question/Issue Explanation Recommendation
Fan becomes noisy Dust accumulation may affect operation Clean fan thoroughly
Cooling seems weak Smoke and debris may restrict airflow Inspect laser module
Fan stopped spinning Prolonged use may lead to failure Replace fan immediately
Laser module becomes hot Cooling performance may be reduced Check fan condition
Unsure which fan to buy Replacement specifications are defined Use 60 mm × 60 mm, 24V, 0.40A

FAQ

1. Is this compatible with all Longer laser machines?

No. The source procedure specifically applies to:

2. Does cleaning the fan improve engraving quality?

Cleaning restores cooling effectiveness, which helps maintain stable laser operation.

3. Do I need additional accessories?

The original procedure only mentions disconnecting and reconnecting existing components.

Follow official product specifications.

4. How often should I replace the fan?

The source does not specify a replacement interval. Replacement is necessary if the fan becomes damaged or stops functioning.

5. Can beginners perform this maintenance?

Users can follow the documented procedure carefully. Handle internal components gently during disassembly.

6. What fan specifications should be used?

Replacement fan specification:

  • 60 mm × 60 mm
  • 24 Volt
  • 0.40 Ampere

Conclusion

Keeping the cooling fan in good condition is an important part of maintaining your LONGER B1 laser engraver. Dust and smoke buildup can reduce airflow over time, while a failed fan may affect cooling performance.

By checking the fan regularly, cleaning it when needed, and using the correct replacement specifications, you can help maintain stable operation for LONGER B1 20W, 30W, and 40W laser engravers.

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