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How to choose laser marking machine in SMT production line

The most important choice of laser marking machine is its laser.So today I’m gonna to tell  you something about four most common lasers.

 

S-UV-300 laser marking machine for PCB
laser marking machine for PCB

1. CO2 laser /(CO2 laser marking machine)

1)Principle

CO2 laser marking machine principle: CO2 laser marking machine, or carbon dioxide laser marking machine (CO2 is carbon dioxide). It is a laser galvanometer marking machine using CO2 gas as working medium. CO2 laser marking machine is a CO2 laser with CO2 gas as the medium, CO2 and other auxiliary gases are charged into the discharge tube on the electrode to add high voltage, the discharge tube produces glow discharge, so that the gas emits a wavelength of 10.64um laser, laser energy amplified, after the galvanometer scanning and F-Theta mirror focusing, under the control of computer and laser marking control card. The marking of images, words, numbers and lines can be carried out on the workpiece according to the requirements of users.

2)Constitution

CO2 laser marking machine consists of CO2 laser, 10.64 field mirror, 10.64 beam expander, CO2 laser power supply, scanning galvanometer, control computer, laser control card, laser control software, laser frame, laser circulating water system, circuit control system and other parts.

3)Advantages and application areas

The main features of CO2 laser marking machine are: using carbon dioxide laser, belonging to the general model, post-focusing mode, small size, high integration.

This machine is suitable for marking most non-metallic materials, such as paper packaging, plastic products, label paper, leather cloth, glass and ceramics, resin and plastic, bamboo and wood products, PCB board, etc. CO2 laser is a gas laser with a wavelength of 10.64 um in the far infrared optical band. CO2 gas filled discharge tube is used as the medium to produce laser. When high voltage is applied to the electrode, glow discharge is produced in the discharge tube. The gas molecule can release the laser, and the laser beam is formed after amplifying the laser energy.

Auto-Laser marking machine
Auto-Laser marking machine

2.Green laser /(Green laser marking machine)

1)Principle

Green laser marking machine uses high-power multi-mode laser diode pumped to produce green laser beam after laser frequency doubling, and then through computer control of high-speed scanning galvanometer deflection marking or cutting. Two laser beams are projected from different angles into transparent objects (such as glass, crystal, etc.), accurately intersecting at a point. Because two laser beams interfere and cancel at the intersection point, their energy is converted from light energy to internal energy, releasing a lot of heat, melting the point into a tiny hole. The machine accurately controls the intersection of two laser beams at different locations, creating a large number of tiny holes that eventually form the desired pattern.

 

2)Advantages and application areas

The green laser with 532 nm wavelength has obvious advantages: smaller spot diameter, more concentrated energy, high electro-optic conversion efficiency, good beam quality, marking accuracy below 10 micron level, neat marking frame, no explosion point, no thermal deformation. Mainly used in glass, crystal products, surface and internal marking, ceramics, metals, electronics, plastics and other products. It belongs to the category of cold light. It is also suitable for some products with high heat reaction and high precision.

3.Ultraviolet laser/(Ultraviolet laser marking machine)

1)Principle

Through photochemical ablation, that is, by laser energy to break the bonding between atoms or molecules, making it into small molecules gasification, evaporation. The focus spot is very small and the heat affected zone is very small, so it can be used for superfine marking and special material marking.

2)Constitution

The main components of UV laser marking machine are: focusing system, trigger type, computer control system, laser power supply, laser, galvanometer field mirror scanning system, marking control software.

3)Advantages and application areas

Ultraviolet laser marking machine with its unique low-power laser beam, especially suitable for ultra-fine processing of the high-end market.iPhone, cosmetics, pharmaceuticals, food and other polymer packaging bottle surface marking; flexible PCB board; silicon wafer micro-hole, blind hole processing; LCD liquid crystal glass, glassware surface, metal surface coating, plastic buttons, electronic components, Communications Equipment,  and other fields.

Laser marking machine
Laser marking machine

4.Optical fiber laser/(Optical fiber laser marking machine)

1)Principle

Optical fiber laser marking machine principle: Optical fiber laser marking machine is the use of laser beams in a variety of different substances on the surface of permanent marking. Marking effect is through the evaporation of the surface material to expose the deep material, or through the light energy causes the chemical and physical changes of the surface material to “engrave” out the trace, or through the light energy burns off part of the material, showing the desired etched patterns, text, bar code and other graphics. The so-called fiber laser marking machine refers to the use of fiber laser marking machine, fiber laser with small size (no water-cooled device, using air-cooled), light is good quality (base mode), maintenance-free and so on.

2)Constitution

Fiber laser marking machine is mainly composed of fiber laser, high-speed scanning mirror, marking software, industrial computer and cabinet. Fiber laser is the core part.

3)Advantages and application areas

Mainly used in: plastics, electronics, metals, ceramics, tobacco and other materials marked out the required text, pattern, bar code and other graphics. Optical fiber laser marking machine easy to operate, fast marking, clear and other advantages, making the production efficiency of enterprises more efficient. Our commonly used pulsed lasers are 10W, 20W, 30W and 50W.

laser marking machine sample1
laser marking machine sample 1

Summary

We design and manufacture automatic machine for the PCB/SMT and Thru-hole industries in Shenzhen China. We help companies looking to low cost equipment with smart, ROI-driven assembly equipment solutions.Contact us today to learn how we can help you。

S-UV-300 laser marking machine for PCB

Product overview and industry application of laser marking machine

Abstract: The laser marking machine is means it use of  laser.  laser has the advantages of small volume (without water cooling, air cooling), good beam quality (fundamental mode), free maintenance etc, is mainly composed of laser, vibration lens, marking card three parts.

Guide: all you want to know about  laser machine knowledge is here!

S-UV-300 laser marking machine for PCB
S-UV-300 laser marking machine for PCB

In recent years, laser marking has become a hot topic in the study of laser physics. It is considered to be a new generation of products that may replace manual marking in an all-round way. The laser marking machine is a permanent mark on the surface of a variety of materials using a laser beam. The principle of marking is to expose deep matter through the evaporation of surface matter, or to engrave traces through the physical change of surface material caused by light energy, or to burn out some substances by optical energy to etch all kinds of graphics、patterns、characters、barcodes etc,.

The laser marking machine is means it use of laser. It has the advantages of small volume (without water cooling, air cooling), good beam quality (fundamental mode), free maintenance etc, is mainly composed of laser, vibration lens, marking card three parts.
Laser marking machine and its laser beam quality was good and with 1064 nm output center,it’s whole life is about 100 thousand hours,Laser compared with other types of markers for longer life. The efficiency of electro-optic conversion is above 28%, and the conversion efficiency of 2%-10% have a great advantage for other type of marking machine. It has excellent performance in energy saving and environmental protection.

Equipment features
1. A variety of metal and nonmetal materials can be processed. Especially for high hardness, high melting point and brittle material, it is more advantageous to mark the brittle material.
2. It belongs to non – contact processing, no damage to products, no tool wear and good marking quality.
3, the laser beam is fine, the processing material consumption is very small, and the processing heat affected zone is small.
4. The processing efficiency is high, the computer is controlled, and the automation is easy to be realized.

Application fields
Markers are widely used in many fields of graphics and text of integrated circuit chip, computer accessories, industrial bearings, watches, electronic and telecommunication products, aerospace devices, auto parts, household appliances, hardware tools, moulds, food packaging, jewelry, tobacco and military things, and mass production line.

Main features
Laser is divided into three kinds of types: CO2 laser/Green laser/UV laser. The following is a detailed introduction.
1, CO2 laser:10~20W, (laser wave is about 1064nm)
2, Green laser:7~10W(laser wave is about 532nm)
3,UV laser:3~5W(laser wave is about 355nm)
Laser marking machine is the most advanced marking equipment in the world. It has many advantages, such as good beam quality, small volume, fast speed, long service life, flexible and convenient installation, and low maintenance.Laser is the latest international, the most reliable structure, small volume, low power consumption.close to the ideal beam, the USB interface output control, optical scanner, laser with high repetition rate, high speed without distortion.

Future advantage
(1) low cost of manufacturing, mature technology and the availability.
(2) the light source has a very small volume area ratio, fast heat dissipation and low loss, so the up conversion efficiency is high and the laser threshold is low.
(3) the output of laser wavelengths is more.
(4)tunability: because of the wide fluorescence spectrum.
(5) the laser easy to apply to various multi-dimensional and arbitrary space processing applications, making the design of the mechanical system very simple.
(6) no thermoelectric refrigeration and water cooling are needed, only a simple air cooling is needed.
(7) high electro-optic efficiency: the integrated electro-optical efficiency is as high as 20%, saving the power consumption of the work and saving the operation cost.

S-UV-30A laser marking machine
S-UV-30A laser marking machine