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Most Comprehensive Fiber Laser Cutting Parameters

With the rapid rise of the laser cutting market, understanding fiber laser cutting parameters can allow us to better choose the right equipment.

The power of the laser cutting machine has also evolved from the original 500w 1000w 1500w 2000w, and the low power has gradually moved towards the development of higher power 4000w 6000w 8000w 12kw 15kw 20kw 30kw. If the fiber laser cutting parameters are set incorrectly, great losses will occur. The following is Let’s take a look at the parameters of different powers.

precision laser cutting
precision laser cutting

Important parameters for setting the fiber laser cutting machine:

Laser cutting requires the setting of various parameters. Different parameters will affect the quality and efficiency of cutting. The parameters that affect laser cutting are: power, cutting speed, power, gas, air pressure, type and size of the laser head nozzle.

Laser power:

The laser is an important energy output system, which represents the thickness of the cutting material that can be melted per unit time. The higher the power, the thicker the plate will be cut. The laser power is the average output power. Different materials require different power levels.

3kW can cut stainless steel to 12mm, and 1kW can cut stainless steel to 5mm. You need to check other parameter settings, focus, air pressure, and cutting speed to ensure the best cutting effect.

Cutting speed:

The linear length of word material that can be cut per unit time. The faster the speed, the shorter the cutting time and the higher the efficiency. It is not good to cut too fast or too slow. The cutting speed must be properly balanced with parameters such as power and air pressure.

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lasers that cut through metal
lasers that cut through metal


The energy output by the laser is eventually concentrated on the focal point. The focal spot diameter is proportional to the focal depth of the focusing lens. Correctly setting the focus position ensures cutting quality.

Nozzle distance, location, size:

The distance between the nozzle and the cutting material is related to the air pressure and flow rate. Generally, the appropriate distance is between 0.8-1mm. If it is too far, the air pressure will be lost and splashing will occur.

The size of the nozzle selected for different cutting materials is different. The thicker the metal, the larger the nozzle.

Nozzle type: single layer and double layer.

The single-layer nozzle uses nitrogen as the auxiliary gas and is usually used for cutting stainless steel, aluminum alloy, brass, etc.;

the double-layer nozzle generally uses oxygen as the auxiliary gas and is usually used for cutting carbon steel.

Before use, consult the laser cutting machine supplier to find out what kind of nozzle is required for cutting.

Before cutting anything, you need to center the nozzle, if it is not centered, it will affect the cutting effect.

fiber laser cutter
laser cutter9

Auxiliary gas and pressure:

The auxiliary gas treatment function is to burn the textile material, cool it, and blow out the slag. Common auxiliary gases include oxygen, nitrogen, inert gas and air, and the required gas purity is 95.5% or higher.
Most metals use oxygen, and some special metal and non-metal cutting uses inert gas or compressed air.

The pressure of the gas can help increase the cutting speed. If the material thickness increases or the cutting speed is slow, the gas pressure should be appropriately reduced. Cut with lower air pressure to prevent frost formation.

Material material, thickness:

When determining how to set cutting parameters, material type, thickness, reflectivity and thermal conductivity also need to be considered. Thicker sheets will reduce cutting quality. Metals with high reflectivity (also known as non-ferrous metals) require more power to cut than other metals, and the materials themselves have coatings and spray paint that can also affect cutting.

Some special materials take a long time to melt and cut, and need to be preheated in advance.

cnc metal laser cutting machine
cnc metal laser cutting machine

Focusing lens condition:

The lens must be good and free of contamination. Damaged or dirty lenses will affect cutting quality or reduce cutting performance.

Cutting path:

Complex paths will reduce the cutting speed, and the laser control is also higher, with the slowest speed at sharp corners.

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