Process analysis of laser marking machine marking

Laser marking machine is more and more popular in the market of marking product LOGO, production date, production batch, exquisite pattern, anti-counterfeiting code in pharmaceutical packaging, hardware accessories, auto parts, electronic market, handicrafts, food packaging and other industries Favored, thus giving up the traditional silk screen printing, inkjet printing and other consumable and environmentally friendly methods, the laser marking machine also shows its irreplaceable advantages with its long life, fast marking speed and high precision.

However, when using the laser marking machine to process the workpiece, you may sometimes encounter some problems, so have you encountered the problem of uneven marking effect of the laser marking machine? , happened to have encountered it, then congratulations on reading this article, and then I will analyze the reasons and solutions for the uneven marking effect of laser marking machine.

Cause analysis and solution of uneven marking effect of laser marking machine

Cause 1. The laser beam output path is blocked or the field mirror and galvanometer Damage to the inner lens

Each machine will be dimming and corrected before the laser equipment manufacturer leaves the factory, but the laser head, fixture and galvanometer may not have the same path due to transportation and other reasons, resulting in the output path of the laser beam It is blocked, resulting in uneven power acting on the processed product and uneven effect. Second, the lens in the galvanometer or the field lens is damaged. When the laser beam passes through the galvanometer and is focused by the field lens, it cannot be reflected well, which makes the laser energy generated by the intact lens area and the damaged area inconsistent, resulting in marking. The effect is uneven.

Solution: Re-adjust the positional deviation of the laser head, the fixing fixture and the galvanometer, re-adjust, check whether the lens in the galvanometer and the field lens is damaged or not, and replace it in time.

The second reason is that the laser processing range exceeds the field lens range or is critical to the field lens range

Each laser marking machine will be equipped with a limited range The field lens, such as the Z maximum range of 300mm*300mm, but its actual marking range cannot reach this value. If the content of the product you need to process exceeds this range or happens to be within this range, then you will find the marking at the boundary. The target effect will appear uneven.

Solution: choose a field lens that is suitable for the laser processing range of your own products.

Reason 3: The reason for the processing material itself

Due to the problem of the material itself, the marking effect is not uniform. If you have been exposed to such a product, you will know that the same product, the marking effect of the same parameter will have different color shades, which is mainly caused by the different oxidation time of each product, so this requires higher parameters for the oxidation of the material itself. .

Solution: For products requiring physical or chemical treatment, the oxidation time and method must be strictly controlled.

Reason 4. The processed products are not placed on the same plane, are inclined or are not parallel to the optical path

The laser marking machine has a fixed Focus, its light is the strongest only at the focus, so once the products or fixtures placed are not parallel to the ground or the laser light path, there will be a part of the surface of the product that is not centered on the focus, which will lead to the marking effect. uneven situation.

Solution: Check that the machine is fixed in a stable position, and check whether the placed product or fixture is inclined.

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