What could be the reason why the material cannot be cut through during laser cutting?

The failure to cut through the material is usually caused by the following reasons:

Insufficient laser power: Check whether the laser power setting matches the material thickness. For example, cutting 8mm stainless steel requires at least 2000W power. If the power is too low, adjust the parameters or check whether the laser is aging (continuous use beyond the rated life will cause power attenuation).

Cutting speed is too fast: Too high speed will cause the laser energy to not fully penetrate the material. The speed test needs to be gradually reduced according to the material type. For example, it is recommended to set the initial speed of stainless steel to 1.5m/min.

Focal offset or lens contamination: Focus lens stains or incorrect installation will cause the light spot to diverge. The lens needs to be cleaned with anhydrous alcohol and the focus needs to be recalibrated. Use a red light focuser to ensure that the focus is 1/3 of the thickness below the material surface.

Auxiliary gas problem: Insufficient gas pressure or wrong gas type (such as high-pressure nitrogen should be used instead of air for cutting stainless steel) will cause the slag to be unable to be blown off. It is necessary to check the gas cylinder pressure (≥15MPa) and whether the pipeline is leaking.

Note: If the above adjustment is invalid, it is necessary to check whether the internal modules of the laser (such as the resonant cavity, pump source) are damaged and contact the manufacturer for inspection.