Troubleshoot "Lens protector temperature exceptions" for xTool MetalFab Laser Welder
Updated Jun 12,2025
Updated Jun 12,2025

Issue description

The touchscreen displays “Lens protector temperature exceptions” and the machine cannot be used.

 

Possible causes

The lens protector may be severely contaminated by splatters or smoke generated during laser processing. The contamination causes laser beams to scatter and diffuse, leading to a rapid temperature increase around the lens protector.

 

Troubleshooting procedure

1. Turn off the machine and move it to a relatively dust-free environment.

2. Wear lint-free gloves. Then, remove the cover and take out the lens protector closest to the nozzle.

3. Check the lens protector.
■ If the lens protector is slightly dirty, use a cotton swab dipped with alcohol to clean it. Then, install it back to the welding head.


■ If the lens protector is burned or heavily dirty and uncleanable, replace it with a new one.

 

Still experiencing issues?

Should the issue persist after completing the preceding steps, submit a ticket via the "Submit a Ticket" button in the "Help Ticket" section below. The standard response time for xTool Customer Service is one business day.

For a prompt resolution, please include the following details:

  • Issue Description: A detailed explanation of the observed problem.
  • Video Evidence: Attach a video demonstrating the issue, where applicable.
  • Troubleshooting Performed: Any troubleshooting steps you have already attempted, along with their results.

This information is crucial for xTool technical support engineers to provide timely assistance.

 


 

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