An In-Depth Look at Laser Marking Parameters for ABS and PC

The article explains the differences between ABS and PC in terms of laser marking parameters, including power, speed, and frequency. Based on practical experience, it offers practical suggestions for optimizing the laser marking effect.Whether you are a beginner or an old hand, you can quickly master the techniques of marking both materials and avoid common problems.

Why are the parameters for marking ABS and PC different?

Laser marking may look easy, but if you don't set the parameters just right, you can get wildly different results depending on the material you're working with.ABS and PC are both commonly used in electronics and automobile parts, but they have very different molecular structures and heat resistance.ABS is tough, but can't handle high temperatures. PC is very hard, but is easily scorched.Therefore, when marking, if the same set of parameters is used, either the marking will be unclear, or the material will be distorted.

Laser marking parameters for ABS material.

ABS is sensitive to temperature. If the power is too high, the surface will melt. It is recommended that you start with a low power setting and adjust from there.

Recommended parameter range.

- Power output: 20 % ~ 40 % (in the case of a 30W laser, the output is about 6 ~ 12W).

Speed: 400-600 mm / s (too slow and the laser will burn a depression).

Frequency: 20-30 kHz (high frequency is suitable for fine text, low frequency for thick lines).

Some tips for operation.

If the edge of the marking turns yellow, that could mean that the power is too high or that the focus is off.You can first adjust the power down, then check the cleanliness of the lens.If the ABS surface has been coated with ink, it is suggested that one begin with a low power setting to avoid carbonizing the coating.

PC material laser marking parameters adjustment.

PC has good light transmission, but in high temperatures it is prone to turn white or crack, so it requires more precise control.

Recommended range.

Power: 15-30 % (a 30 W laser would be about 4.5-9 W).

Speed: 500-800 mm / s (high speed reduces heat buildup).

- Frequency: 50-80 kHz (higher frequencies create a more uniform, lighter mark).

A guide to pitfalls.

The most common problem is "foggy white patches," which usually occur when the material is locally overheated.In this situation, the priority should be to speed up the marking process or add a cooling air pump.If it is transparent PC, try sticking black tape to the back to increase absorption of the laser.

General points to consider when labeling ABS and PC.

No matter whether you are using ABS or PC, there are two things to remember:

The thickness of the material affects the parameters.

The parameters for a 1-millimeter-thick plate and a 5-millimeter-thick plate must differ by at least 10 to 15 %.Thicker materials need a slightly higher power, but must be accompanied by a faster scanning speed, otherwise it's easy to burn through.

Don't forget about humidity.

In a humid environment, the material's surface is prone to condensation, which causes uneven markings.The humidity in the workshop should be controlled between 40 % and 60 %, and the surface of the material should be lightly blown with a hot air gun if necessary.

Finally, it should be remembered that different models have different specifications, so the figures given are only for reference.Before starting, it's best to practice on scrap material three to five times, and make minor adjustments until you're satisfied with the result. This saves a lot of time in reworking.