Three Key Points to Setting the Power for Laser Marking Glass

Glass is easily shattered by high temperatures, so it is crucial to set the power level correctly.By focusing on three key points--material property analysis, parameter gradient testing, and real-time monitoring and adjustment--we will teach you how to avoid material damage while achieving the desired marking effect and maintaining operational safety.

Feel the temper of the material.

Glass is not a monolithic material. The thickness and composition of the glass make a big difference in how well it resists laser light.He suggested that they test the material first using scraps, measuring the thickness with a vernier caliper and then using a thermal imager to observe the heated area.If you find fine cracks on the surface of the glass, it is probably due to the power being too high.

Thickness determines the basic value.

For ultra-thin glass under 0.5 mm, the power should be kept under 15 watts. For normal 3-5 mm window glass, 25-35 watts is fine. For thicker glass over 8 mm, don't go straight to 50 watts. First try 40 watts for two passes.

The parameters must be carefully adjusted.

Have you ever seen an old timer adjusting a radio?It is recommended that you start with the lowest power level, then increase the power level by 5 watts each time, marking the power level each time you do. Then you can use a magnifying glass to compare the clarity of the lines and the color of the edges.Remember, the power isn't necessarily better the higher it is; the most important thing is finding that critical point where you can leave a clear trace.

The speed and frequency must be coordinated.

Adjusting the power is not enough, just as pressing the gas pedal to the floor without changing gears is not enough.The speed parameter is suggested to start at 800mm / s, and the frequency is first set at 20 kHz.If the signal is fuzzy, try increasing the frequency by 5 kHz before adjusting the power knob.

You have to watch them all the time.

But don't think that once you've set the parameters you can just sit back and relax. You still have to sit by the machine and keep an eye on it.You should look at two things: whether there is any smoke coming from the laser head, and whether there are any rainbow patterns on the back of the disc.If you smell smoke, you can stop and check out what's going on. This is much more effective than watching a video recording.

Cooling down is an art.

Prepare a spray bottle with a fogging function and use it to cool the glass down during the intervals between stages.But never spray water directly onto the laser point! The correct way is to spray a light mist 5 centimeters away from the work area and then wait ten seconds before continuing.If conditions permit, the use of a circulating air conditioner is more stable.