There are three common types of laser marking systems in the market for your business plans according to its working method, including mask mode marking system, array marking system, and scanning marking system.
Mask Mode laser marking system
Mask mode laser marking is also called projection marking. The mask mode laser marking system is composed of a laser, a mask plate and an imaging lens. Its working principle is that the laser beam expanded by the telescope is evenly projected on the pre-made mask plate, and the light is transmitted from the carved part. The pattern on the mask is imaged onto the workpiece (focal plane) through the lens. Usually each pulse can form a mark. The surface of the material irradiated by the laser is quickly heated to vaporize or produce a chemical reaction, and the color change occurs to form a clearly distinguishable mark. Mask mode marking generally uses CO2 laser and YAG laser. The main advantage of mask mode marking is that a laser pulse can produce a complete mark including several symbols at a time, so the marking speed is fast. For high-volume products, you can mark directly on the production line. The disadvantages are poor marking flexibility and low energy utilization.
Array Laser Marking System
Array laser marking system uses several small lasers to emit pulses at the same time. After passing through the mirror and focusing lens, several laser pulses are ablated (melted) on the surface of the marked material to form small pits of uniform size and depth. Each character, The pattern is composed of these small round black pits, generally 5 points in horizontal strokes and 7 points in vertical strokes, thus forming a 5×7 array. Array marking generally uses low-power RF excited CO2 lasers, and its marking speed can be up to 6000 characters/s, which makes it an ideal choice for high-speed online marking. Its disadvantage is that it can only mark dot characters and can only reach 5×7.
Scanning Laser Marking System
The scanning laser marking system is composed of three parts: computer, laser and XY scanning mechanism. Its working principle is to input the information to be marked into the computer. The computer controls the laser and XY scanning mechanism according to the pre-designed program to make the special optical system transform The high-energy laser spot scans and moves on the processed surface to form a mark.