Why are the letters printed by laser marking machine yellowish?

in FAQs about Laser Marking, , , , ,

When marking stainless steel products with a laser marking machine, sometimes there is a problem that the marking letters are yellow.

Why is the word printed by laser marking machine yellow?

The power is too large.

How to adjust?

We can slightly adjust the marking parameters of the laser marking machine in the software Ezcad. For example, if the speed of the laser marking machine is slightly faster, it can be adjusted to 500~800, and the frequency is generally selected to be 20. Just use the default frequency.

How to mark black font on stainless steel?

There are several ways to achieve marking black fonts.

1. Set the power to 80, the speed to 100, the Hatch Line Distance to 0.05, the frequency to 20, and then shift the focal length of the marking machine upwards by 1~3 mm. The advantage of this adjustment is that the effect is better but the speed is slightly slower.

stainless steel marking letters

2. Adjust the power to 80, the speed to 350, the Hatch Line Distance to 0.1, the frequency to 50, and then shift the focal length of the marking machine up by 1 mm. This method is much faster than the previous method.

Adjust the power to 80

After the above analysis, it can be seen that the yellowish characters printed by laser marking machine is caused by too high power or too slow speed.

If we want to mark the font in white, we can directly change the speed to 1000~3000.

Conclusion

To sum up, Marking black and white are mainly controlled by the focal length, power and speed of the laser marking machine. Skilled application, controlling these three parameters can make the color we need very well. In addition, there is a mopa laser marking machine, in addition to easily marking black on the stainless steel surface, it can also mark colored text and patterns.

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