About Laser Marking Machine
Oct 23, 2026
FAQs
About Laser Marking Machines
Can Laser Marking Create QR Codes?
Yes. Laser marking is widely used to create permanent QR codes on metals, plastics, and other materials. QR codes marked by fiber lasers on stainless steel and aluminum are durable and scannable, making them suitable for traceability in industrial and automotive applications.
Can Laser Marking Create Barcodes?
Yes. Both 1D barcodes and 2D Data Matrix codes can be laser marked. Fiber lasers produce high-contrast codes on metals that remain readable even after post-treatments like coating or heat treatment. The precision of laser marking ensures the bar width and spacing meet scanning standards.
Can Laser Marking Create Serial Numbers?
Yes. Serial numbers are one of the most common applications of laser marking. Fiber lasers mark alphanumeric serial numbers on metals with high precision and durability, supporting traceability throughout a product's lifecycle. Automated serialization-where each part receives a unique number-is a standard laser marking function.
Can Laser Marking Create Black Marks on Stainless Steel?
Yes. Fiber lasers can produce black marks on stainless steel through an annealing process. The laser heat creates a thin oxide layer on the surface without removing material, resulting in a dark, high-contrast mark that remains smooth to the touch. This is distinct from engraving, which cuts into the surface.
Can Laser Marking Create Color Marks?
Yes, on certain metals. Color marking is achieved by controlling laser parameters to grow a precise oxide film on the surface. The film thickness determines the perceived color through light interference. Stainless steel, titanium, and chromed steels can produce colors including blue, gold, violet, and black by varying laser power, frequency, and scan speed. This is primarily a surface oxidation effect, not a pigment application.
How Fast Is Laser Marking?
Laser marking is fast. Speed depends on mark complexity, material, and laser power. For reference, a 100 W fiber laser can mark a 16×16 Data Matrix code on aluminum in 1.40 seconds, and adding 16 alphanumeric characters adds only about 0.38 seconds. Simple logos or text can be marked in well under a second. Galvo-based systems are faster than gantry systems for small marks.
How Deep Can a Laser Mark?
Depth depends on the laser type, power, and number of passes. Surface marking (annealing, oxidation) is essentially zero-depth-it alters the surface without removing material. Engraving can reach depths from a few micrometers up to several millimeters. Fiber lasers can achieve deep engraving on stainless steel through multiple passes, removing layers progressively. For most identification marks, depths of 10–50 µm are sufficient.
Can Laser Marking Be Used on a Production Line?
Yes. Laser marking is well-suited for inline production because it is non-contact, consumable-free, and highly automated. Fiber lasers can mark parts on moving conveyors, and systems can be integrated with vision systems to locate and mark parts even when positioning is imperfect. Typical production-line applications include marking aluminum extrusions on the fly and serializing castings immediately after formation.
Can a Laser Marker Be Customized?
Yes. Laser marking systems can be customized in several ways: enclosure size and safety configuration, integration with conveyors or robotic arms, vision-assisted positioning for irregular parts, custom software for serialization or database connectivity, and specialized fixtures for unique part geometries. Laserax, for example, builds custom enclosures sized for specific products like aluminum billets.
Can a Laser Marking Machine Mark Curved Surfaces?
Yes. Marking curved or uneven surfaces is possible with several approaches. 3D laser marking technology adjusts the focal point dynamically to follow surface contours, maintaining consistent mark quality on curved, tilted, or multi-level surfaces. Rotary axes can rotate cylindrical parts during marking. For less demanding applications, a larger focal depth can accommodate moderate surface height variations.
