
Geaccepteerd antwoordI suggest you investigate the following items:
1. Check the protective lens, focusing lens, collimating lens, and QBH fiber head for any foreign objects
2. Whether the welding focusing lens and cleaning focusing lens are installed correctly
3. Check if the temperature of the graduated tube is abnormal.
4. Is the galvanometer mirror lens normal










Upon inspection, the issue was found to be related to the installation of the focusing lens, which has now been resolved. Thank you for your response.