With incomparable advantages such as large cutting format, fast cutting speed and the ability to cut thicker plates, high power laser cutting has gained wide recognition in the market.Nonetheless, as the high power laser cutting technology is still in the initial stage of popularization, some operators are not very skilled in mastering the skills of high power laser cutting.Tianhong laser high-power laser cutting engineers summed up a series of high-power bad laser cutting  solutions through long-term testing and research for all industry colleagues to refer to.

When poor cutting results are found, the following causes should be investigated first:

1. All lenses in the laser head are clean and free of contamination;
2. Water temperature of the water tank is normal and the laser is free of condensation;
3. Excellent cutting gas purity, smooth gas path, no gas leakage.

Problem One：Possible causes of bottom burrs：

1、Nozzle diameter is too small to meet the processing requirements；

2、Negative defocus does not match, should increase the negative defocus and modulate the appropriate position；

3、Low air pressure results in burrs at the bottom, which cannot be cut adequately. 

Solutions：

1、Optional large diameter nozzle can increase the air flow；

2、Increase the negative defocus so that the cutting section reaches the bottom position；

3、Increase air pressure to reduce bottom burrs.

Cutting burrs

Problem Two：Possible causes of cutting with streaks：

1、Nozzle type selection is not correct, the nozzle is too large；

2、The air pressure setting is not correct and air pressure is too large, which result in overburning with streaks；

3、Wrong cutting speed, too slow or too fast cutting speed can also cause sufficient overburning.

Solutions：

1、Replace the nozzle, replace the nozzle with a small diameter. For example, as to 16mm carbon steel bright surface cutting, you can choose high-speed nozzle D1.4; As to 20mm carbon steel bright surface, you can choose high-speed nozzle D 1.6；

2、Reduced cutting air pressure for better quality of end cuts；

3、Adjust the cutting speed and match power and cutting speed in order to achieve the following right effect.

Cutting with streaks

Problem Three ：Problem causes of bottom tumor slags：

1、Too small nozzle type selection result in cutting focus does not match；

2、Air pressure is too small or too large, cutting speed is too fast；

3、Poor plate material, bad plate quality and small nozzle are difficult to remove the tumor slag.

Solutions：

1、Replace the large diameter nozzle and adjust the positive focus point to the right position；

2、Increase or decrease the air pressure until the air flow is appropriate；

3、Choose good sheets and plates.

Cutting with slags