The Impact of Laser Power and Scanning Speed on Marking Quality

Through actual testing data, it analyzes how laser power and scan speed directly affect the results of laser marking, covering key indicators such as depth, clarity and color changes. This helps users quickly master parameter optimization techniques, improving the efficiency of marking and the quality of the finished product.

Why do laser parameters affect the effect of the marking?

The core principle of laser marking is that high-energy light beams produce a physical or chemical change on the surface of materials.The power of the laser determines the strength of the energy output, and the speed of the scan controls how long the beam lingers in one area.These two parameters are like the combination of "power" and "rhythm." If the power is too great, it may burn through the material, while if the speed is too fast, the markings may be blurred.In actual tests, we discovered that the sensitivity of the parameters to different materials (such as metal, plastic, and glass) was markedly different, and needed to be adjusted accordingly.

Actual test data: Power and speed combinations.

We selected 304 stainless steel and acrylic as test materials, and used a 20W fiber laser engraving machine to record the actual results under different parameter combinations.

Results of stainless steel materials testing.

- Power 50 %, speed 800 mm / s: Light gray mark with slightly ragged edges.

70 % power, 500 mm / s: Dark black, sharp contours.

90 % power, 300 mm / s: Light oxidized pitting appears on the surface.

Acrylic material test results.

- 30 % power, 1000mm / s: A semi-transparent engraving, hard to see with the naked eye.

- 50 % power, 600 mm / s: The fog is even.

- 70 % power, 400 mm / s: carbonization, yellowing.

Practical techniques for parameter optimization.

According to my own experience, here are some methods of adjustment that work:

First the speed is set, then the power.

For beginners, it is recommended to start at the speed recommended by the manufacturer, for example 500-800mm / s for metals and 600-1000mm / s for plastics.Once a constant speed is achieved, the power is gradually increased in 5 % increments, and the results observed.When the material is reflective or uneven, the speed can be reduced 10-15 % to compensate for the loss of energy.

The secret of handling special materials.

In order to avoid the coating from peeling off, it was recommended that the power be set to 80 % of the standard value and the scanning speed raised.For brittle materials such as ceramics, the low-energy, high-frequency mode (high frequency + low power) can reduce the risk of cracking.Before testing, it is imperative to do a small test in the scrap area to prevent a direct crash.

Common Problems and Emergency Solutions

What do you do if the color of the dye is uneven?

First check whether the focusing lens is dirty, and then try reducing the power by 3-5 % and increasing the speed by 50-100 mm / s.If the surface is curved, remember to turn on the dynamic focus function.

How do you deal with deformation caused by the marking process?

This is a common problem with thin-walled plastic parts, and can be solved by using a "pulse mode" to disperse the heat, or with compressed air to assist in cooling.If you really can't get it to work, you may be better off just switching to a UV laser.

Finally, there is no magic formula for parameters. The best way is to experiment and keep a record.When changing materials, it is recommended that you use Excel to make a simple testing table, and mark the results of the tests. Gradually you will build up your own database of experience.