Common Problems and Solutions for Laser Marking

The parameter settings of a fiber laser marking machine directly affect the marking results and the stability of the equipment.To avoid common problems such as inappropriate power settings, mismatched speeds and frequencies, and lens misalignment, you should adjust the power range based on the characteristics of the materials you are processing (such as 20-30 % for metals and 10-15 % for plastics), optimize the speed and frequency combination (500-800 mm / s and 20-50 kHz are recommended), and regularly clean the lenses and calibrate the focal length.For long-term use, we recommend building a parameter database to adjust for the environment temperature, to ensure marking efficiency and precision.

Why are the parameters so important for the marking effect?

The parameters of the laser marking machine are like an "operation manual" that directly determine the clarity of the marking, the speed of the marking, and the adaptability of the material.If the parameters are not adjusted properly, the characters may be unclear, or the depth of the characters may be uneven, or the material may even be damaged.Different materials, such as metals, plastics and ceramics, have very different requirements for power, frequency and speed, so the parameters need to be set accordingly.

The three main causes of unstable laser marking and how to solve them.

Power output is too high or too low.

Too much power can burn the surface of the material, while too little can result in a blurred mark.I suggest that you first refer to the recommended parameter ranges given in the material manufacturer's documentation, and then do a small-scale test.For example, stainless steel usually requires 20-30 % power, but plastic may require even less (10-15 %) to avoid melting and distortion.

The speed of the labeling and the frequency of the bottles are out of sync.

If the speed is too fast, it will "break the line." If it is too slow, then it is inefficient.A frequency that's too high might result in too much overlap, which could cause the image to become blurry.For example, when engraving metal, the speed is usually controlled at 500-800 millimeters per second, and the frequency is 20-50 kilohertz.If the edges are rough, try reducing the speed or adjusting the frequency.

The focus has shifted, or the lens is dirty.

If the focal length is off, the laser won't be able to focus, and the mark will be blurred.Regular cleaning of the lenses and adjustment of the focus are basic skills.If there is any blurring of the image, first check to see if there is any oil or scratches on the lens. Then readjust the focus height (usually about 10 to 15 cm above the surface of the material).

How can the parameters be kept in the best state for a long period of time?

Develop the habit of recording parameters every time materials are changed, and build your own "parameters library.For example, he uses Excel spreadsheets to organize and save the parameters corresponding to different materials and thicknesses.In addition, when the ambient temperature changes greatly (for example, between summer and winter), the laser's heat dissipation efficiency is affected. Appropriately lowering power or increasing cooling time can extend the lifespan of the equipment.