Symptoms: The protective lens is damaged within a short period of time, showing burn marks; the light-emitting surface of the lens exhibits small, dot-like damage, appearing as black spots or white spots with black centers.
Cause Analysis:
Damage is caused by slag splatter resulting from factors such as non-genuine lenses, improper processes, techniques, or settings; in extremely rare cases, it may be due to abnormal laser beam output.
Solutions
1. Appropriately increase the gas pressure. Under normal circumstances (as indicated by the flow meter), the flow rate should not be less than 15, and the pressure should not be lower than 4. It is recommended to use an oxygen pressure gauge set to no less than 2 kg.
2. During welding, maintain a 45-degree angle between the welding torch and the workpiece; do not weld vertically.
3. Set parameters to allow for gradual ramp-up and ramp-down, such as a gas on/off delay of 200–500 ms, a laser power on/off ramp of 20%, and a laser power ramp-up/ramp-down time of 200–300 ms (do not set to 0).
4. When welding aluminum or galvanized sheet metal, these materials are more likely to damage the lens than other materials; therefore, weld at the lowest possible power.
5. The quality of the protective lens also determines its durability; when addressing such issues, be sure to use original manufacturer lenses.
6. At high power levels, lens wear increases compared to low power levels; this is beyond our control. For dual-wire welding, it is recommended to reduce the scanning speed to around 160.
7. If the above measures fail to resolve the issue, replace the F200 focusing lens and install an extended, wide-scale tube to reduce spatter (requires additional purchase).
