Three Practical Methods for Eliminating Blurred Laser Markings

Common causes of blurry laser marking include improper equipment parameter settings, dirty lenses, and misalignment.This article provides three practical methods to help you quickly identify the root cause of problems and improve the clarity of your marking.

Method one: Check to see if the settings are correct.

When people see blurry markings, they often get nervous, but actually most of the time the problem is with the parameters.

Power and speed don't get in each other's way.

If the power is too low or the speed too high, the laser energy cannot keep up, and the lines will be broken.For example, if you are engraving stainless steel, we suggest you start with a medium power (60 %) and medium speed (800mm / s), and then fine-tune to find the balance point.

Don't raise the frequency.

Too high a frequency can cause the surface of the material to burn, resulting in a blurry image.For plastics, the frequency should be below 20 kHz. For metals, it can be higher.

Method 2: Give your equipment a thorough cleaning.

If the lens or the objective lens gets dusty, it's like wearing dirty glasses, and the markings will be blurred.

You should rub the three places I just pointed out.

1. Magnifying lens: Use a cotton swab dipped in alcohol to wipe the lens in a circular motion from the center out.

2. Mirror: Clean at least once a week, but never touch directly with the hand.

3. Lens: If you see rainbow patterns when you look at it, clean it immediately.

The air ducts must also be checked for leaks.

Insufficient air pressure will result in dust accumulating during the marking process. Remember to check if there are any leaks in the air hose. It is recommended to maintain a pressure of 0.4-0.6 MPa.

Method 3: Refocus Don't be lazy.

A deviation of one millimeter in focus can make the difference between a good photo and a bad one.

The two steps to finding the right focus.

1. Place a metal sheet at an angle on the work bench and strike it. Observe which part of the sheet has the finest lines.

2. Adjust the height of the stage and repeat the test until you find the clearest height, then tighten the screws.

You have to take into account the thickness of the material.

When marking a curved object, remember to manually adjust the focal distance by 0.2-0.5 mm after using the red laser to locate the object, rather than relying completely on automatic focusing.

Finally, if you have a problem, don't rush to call the repair shop. If you follow these three points, you'll solve 80 % of the problems.If it still doesn't work, it could be that the laser or the galvanometer motor are worn out.