Laser marking machine PCB assembly

      Laser marking machine is to use laser beam to make permanent marks on the surface of various materials. The effect of marking is to expose the deep material through the evaporation of the surface material, so as to carve exquisite patterns, trademarks and characters. Laser marking machines are mainly divided into CO2 laser marking machines, semiconductor laser marking machines, and fiber laser marking machines. And YAG laser marking machine, laser marking machine is mainly used in some occasions that require finer and higher precision. Used in electronic components, integrated circuits (IC), electrical appliances, mobile communications, hardware products, tool accessories, precision instruments, glasses clocks, jewelry, auto parts, plastic buttons, building materials, PVC pipes.

Fundamental

      Laser marking is the use of laser beams to permanently mark the surface of various materials. The effect of marking is to expose the deep material through the evaporation of the surface material, or to "carve" traces through the chemical and physical changes of the surface material through light energy, or to burn part of the material through light energy, showing the required etching. pattern, text.

Composition

laser power

       The laser power supply of the fiber laser marking machine is a device that provides power for the fiber laser, and its input voltage is AC220V. Installed in the marking machine control box.

Fiber-optic laser

       The fiber laser marking machine adopts imported pulsed fiber laser, the output laser mode is good and the service life is long, and it is designed to be installed in the marking machine casing.

Galvo scanning system

       The galvanometer scanning system is composed of two parts: optical scanner and servo control. The whole system is designed and manufactured with new technologies, new materials, new processes and new working principles.

       The optical scanner adopts a moving magnet deflection servo motor. It has the advantages of large scanning angle, large peak torque, large load inertia, small electromechanical time constant, fast working speed, stable and reliable, etc. The precision bearing anti-backlash mechanism provides super-bottom axial and radial runout errors; "electronic torsion bars" replace traditional elastic material torsion bars, greatly improving the service life and reliability of long-term work; the working principle of zero power at any position reduces the The power consumption is reduced, the heating effect of the device is reduced, and the constant temperature device is omitted; the advanced high-stability precision position detection sensing technology provides high linearity, high resolution, high repeatability, and low drift performance.

       The optical scanner is divided into an X-direction scanning system and a Y-direction scanning system, and a laser reflector is fixed on each servo motor shaft. Each servo motor is controlled by digital signals from the computer to scan its trajectory.

Focus system

       The function of the focusing system is to focus the parallel laser beams on one point. Mainly adopts f-theta lens, different f-theta lenses have different focal lengths, and the marking effect and range are also different. The fiber laser marking machine adopts imported high-performance focusing system, and its standard lens focal length is f=160mm, which can effectively scan Range Φ110mm. Users can choose the type of lens according to their needs.

Optional F-θ lenses are:

f=100mm, effective focus range Φ65mm.

f=160mm, effective focus range Φ110mm.

Computer control system

      The computer control system is the control and command center of the entire laser marking machine, and it is also the carrier of software installation. The workpiece marking process is completed through the coordinated control of the acousto-optic modulation system and the galvanometer scanning system.

      The computer control system of fiber laser marking machine mainly includes chassis, motherboard, CPU, hard disk, memory stick, D/A card, floppy drive, monitor, keyboard, mouse, etc.

Features

There are two generally accepted principles:

     "Thermal processing" has a laser beam with high energy density (it is a concentrated energy flow), irradiated on the surface of the material to be processed, the surface of the material absorbs the laser energy, and generates a thermal excitation process in the irradiated area, so that the surface of the material (or Coating) temperature rises, resulting in metamorphosis, melting, ablation, evaporation and other phenomena.

     "Cold processing" (ultraviolet) photons with very high load energy can break the chemical bonds in the material (especially organic material) or the surrounding medium, so that the material can be destroyed by non-thermal process. This kind of cold processing has special significance in laser marking processing, because it is not thermal ablation, but cold peeling that does not produce "thermal damage" side effects and breaks chemical bonds, so it is not harmful to the inner layer and nearby areas of the processed surface. Produce heating or thermal deformation and other effects. For example, excimer lasers are used in the electronics industry to deposit thin films of chemicals on substrate materials and to create narrow grooves in semiconductor substrates.

Comparison of Different Labeling Methods

      Compared with the inkjet marking method, the advantage of laser marking engraving lies in: a wide range of applications, a variety of materials (metal, glass, ceramics, plastics, leather, etc.) can be marked with permanent high-quality marks. There is no force on the surface of the workpiece, no mechanical deformation, and no corrosion on the surface of the material.

Applications

      Can engrave a variety of non-metallic materials. Used in clothing accessories, pharmaceutical packaging, wine packaging, architectural ceramics, beverage packaging, fabric cutting, rubber products, shell nameplates, craft gifts, electronic components, leather and other industries.

1. It can engrave metal and various non-metal materials. It is more suitable for the processing of some products that require fine and high precision.

2. Applied to electronic components, integrated circuits (IC), electrical appliances, mobile communications, hardware products, tool accessories, precision instruments, glasses clocks, jewelry, auto parts, plastic buttons, building materials, PVC pipes, medical equipment and other industries. 

3. Applicable materials include: ordinary metals and alloys (all metals such as iron, copper, aluminum, magnesium, zinc, etc.), rare metals and alloys (gold, silver, titanium), metal oxides (all kinds of metal oxides are acceptable), Special surface treatment (phosphating, aluminum anodization, electroplating surface), ABS material (electric appliance shell, daily necessities), ink (light-transmitting keys, printed products), epoxy resin (electronic component packaging, insulating layer).

Common type

     The most common laser marking machines on the market are mainly CO2 laser marking machines and YAG laser marking machines. Later, YAG laser marking machines were gradually replaced by semiconductor laser marking machines, becoming the largest market share of laser marking machines. A type of model, and there are also high-end end-pumped laser marking machines, fiber laser marking machines, ultraviolet laser marking machines, etc.

     With the development of science and technology, fiber laser marking machines in the electronics industry are more and more accepted by more and more people. Its characteristics are very obvious: integrated design, small size, low power consumption, long life, high efficiency, maintenance-free, high High-quality laser beam with fine spot and no consumables.

Product category

Press laser

     According to different lasers, laser marking machines can be divided into: CO2 laser marking machines, semiconductor laser marking machines, YAG laser marking machines, fiber laser marking machines. According to the laser visibility, it is divided into: ultraviolet laser marking machine (invisible), green laser marking machine (visible laser), infrared laser marking machine (invisible laser).

by wavelength

     According to different laser wavelengths, it can be divided into: deep ultraviolet laser marking machine (266 nm), green laser marking machine (532nm), lamp pump YAG laser marking machine (1064nm), semiconductor side pump YAG laser marking machine, semiconductor End pump YAG laser marking machine (1064nm), fiber laser marking machine (1064nm), CO2 laser marking machine (10.64um).

Distinguish

Laser wavelength is different

1. Deep ultraviolet laser marking machine: 266 nm;

2. Green laser marking machine: 532nm;

3. Lamp pump YAG laser marking machine: 1064nm;

4. Semiconductor side pump YAG laser marking machine, semiconductor end pump YAG laser marking machine: 1064nm;

5. Fiber laser marking machine: 1064nm;

6. CO2 laser marking machine: 10.64um.

Works differently

1. Lamp-pumped YAG laser marking machine: Krypton lamp is used as the energy source (excitation source), and ND: YAG is used as the medium for generating laser. The emission of specific wavelengths can promote the production of working materials and release the laser through the energy level transition, amplifying the laser energy. Finally, the laser beam for material processing is formed.

2. CO2 laser marking machine: CO2 gas is used to fill the discharge tube as the medium for generating laser, and a high voltage is applied to the electrode to generate glow discharge in the discharge tube, causing the gas molecules to release laser light, and the laser energy is amplified Forms the laser beam for material processing.

3. Semiconductor side-pumped YAG laser marking machine: Use a semiconductor laser diode with a wavelength of 808nm to pump the Nd: YAG medium, so that the medium produces a large number of inversion particles, and under the action of the Q switch, it forms a giant pulse laser output with a wavelength of 1064nm, electro-optical conversion efficient.

4. Semiconductor end-pumped YAG laser marking machine: pump the semiconductor pump light (808nm) directly from the end face of the laser crystal, and output it through the optical mirror group to generate laser light. The light conversion efficiency is greatly improved.

5. Optical fiber laser marking machine: output laser directly from optical fiber.

6. Green laser marking machine: Green laser marking machine is developed by using the most advanced laser pumping technology (side pumping or end pumping) with a wavelength of 532nm in the world.

Mark range

1. CO2 laser marking machine: mainly used for non-metal (wood, acrylic, paper, leather, etc.), cheap price.

2. Green laser marking machine, UV laser marking machine: mainly used for high-end ultra-fine IC and other products. The price is high, and the product customization is the main one.

3. Lamp pump YAG laser marking machine: mainly used for low-demand products such as metal and plastic, and the price of laser marking machine is moderate.

4. Semiconductor side-pump laser marking machine: It is the same as the lamp pump YAG laser marking machine, but it is more stable and the price is moderate.

5. Semiconductor end-pump laser marking machine: It is the same as the lamp pump YAG laser marking machine, stable and power-saving, but it is used for high-end production and the price is higher.

6. Fiber laser marking machine: fine marking, power saving, maintenance-free, used for high-end products such as mobile phones and buttons. The price is high.

Semiconductor type

    Its light source uses a semiconductor array, so the light conversion efficiency is very high, reaching more than 40%; the heat loss is low, and there is no need for a separate cooling system; the power consumption is less, about 1800W/H. The performance of the whole machine is very stable, and it is a maintenance-free product. The maintenance-free time of the whole machine can reach 150,000 hours, which is equivalent to 10 years of maintenance-free. There is no replacement of krypton lamps and no consumables.

Basic configuration and technical specifications:

Model Item CCC-DP50

Laser CCC-DP50 (Coherent Laser Module)

Scanning mirror YAG-16mm lens

Focusing lens 1064-110

Q Switch UK Gooch & Housego

Control software Professional laser marking software for Windows98/2000/XP

cooling system water cooling

Working method Static marking font More than 50 standard fonts, and specially designed handwriting font input function

Input power 220V AC 50Hz

Laser output power 0-50W

Marking frequency 0.5－50KHZ

Machine power 1500W

Marking line width 0.02mm

Marking depth ≤3 mm (adjustable depending on the material) Marking speed ≤7000㎜/s

Minimum character 0.2mm

Marking range Standard: 110mm×110mm Remarks Precision three-dimensional lifting operation table

CO2 type

Features:

1. Using CO2 gas laser tube, beam expander focusing optical system and high-speed galvanometer scanner, stable performance, long life, maintenance-free

2. Can be widely used in electronic components, electrical parts, medicine, food, handicrafts, leather products, plastic products and other industries

3. The machine can be used alone or installed on the assembly line for joint use

4. The printing effect and marking speed can meet the requirements of high efficiency, high speed and high reliability of modern mass production

(1) The professional marking control software of this machine is a software system based on vector graphics marking, which supports background software such as Autocad and photoshop. The system is powerful and easy to master

(2) Marking trademarks and models on transistors, chip components, ICs, ceramic capacitors, thermistors, etc., the characters are clear and beautiful, and will not wear out;

Application range of CO2 laser marking machine:

The machine is widely used and can engrave most non-metallic materials: paper, leather, wood, plastic, plexiglass, cloth, acrylic, wood bamboo, rubber, crystal, jade, ceramics, glass and artificial stone, etc.

Technical parameter:

Laser wavelength: 10.64μm

Laser repetition rate: 5-20kHz

Standard engraving range: 110mm×110mm

Engraving depth: ≤5mm

Engraving line speed: ≤7000mm/s

Minimum line width: 0.1mm Minimum character: 0.4mm

Repeatability: ±0.001mm

Machine power: 250W

Laser power: 10W, 30W, 50W, 100W

YAG galvanometer type

Features

    Image scanning can be completed in a short time by using high-speed scanning lenses, and exquisite marks can be completed; reasonable design, fine workmanship, and high-grade appearance; CNC rotary head, automatic fixture, and loading and unloading production line can be configured according to user requirements; automatic completion of date and serial number , can mark bar code; can carry out data communication and networking.

Application range

    Applicable to various metals, metal oxides, glass, plastics, etc., used in bearings, chips, mobile phone buttons, clocks, stainless steel tableware, drill bits, electrical panels, electric dials, U disks, computer keyboards, batteries, electronics, communications, electrical appliances , instruments, tools, precision instruments, accessories, clocks and glasses, hardware plumbing, building materials, auto parts, etc.

Fiber type

Fiber laser marking machine features

      Fiber lasers are divided into two categories: continuous fiber lasers and pulsed fiber lasers. According to the size of the power: continuous 5W, 10W, 20W to 400W, above 1000W; pulse 10W, 15W, 20W, 25W, 30W to 50W. Fiber laser marking machine is the most advanced laser marking equipment in the world today. It has the characteristics of good beam quality, small size, fast speed, long working life, flexible and convenient installation and maintenance-free. Widely used in integrated circuit chips, computer accessories, industrial bearings, clocks, electronics and communication products, aerospace devices, various auto parts, home appliances, hardware tools, molds, wires and cables, food packaging, jewelry, tobacco and military affairs, etc. Marking of graphics and text in the field, as well as mass production line operations. Fiber laser, the latest international model, the most reliable structure, small size (about 410*200*270mm), low power consumption, no high voltage and no need for a huge water cooling system (only about 300W), high beam quality, close to the ideal beam, USB interface output control, optical scanning galvanometer, high laser repetition rate, high speed without distortion.

Precautions

1. Two major precautions for fiber laser marking machines

Prevent fiber breakage

The pump source of the laser system and the laser head are connected by optical fiber. Users should ensure that the bending diameter of the optical fiber is greater than 300mm during use or transportation. Severe bending will cause the fiber to break and the laser system not to work properly.

prevent dust pollution

     When the optical fiber inlet of the power supply and laser head is not connected to the optical fiber, the protective cover provided with the system must be installed to prevent external dust from polluting the internal optical components.

When the optical fiber is not connected to the power supply and the laser head, the protective cover provided with the system must be installed to prevent the fiber end face from being polluted. Seriously, wipe clean with a dust-free paper moistened with a mixture of alcohol and ether). Failure to install the protective cover will contaminate the internal optical components and fiber end faces, will cause the entire laser system not to work properly, and void the warranty.

2. About avoiding condensation

    Prevent condensation on laser crystal and LD cavity surface

    It is forbidden for the laser system to work in a high humidity environment, and the customer should ensure that the ambient humidity is less than 60%. When the temperature difference between the laser crystal temperature and the ambient temperature is too large (greater than 10 degrees), it may cause the laser crystal to condense, and the condensation will cause the power of the laser system to drop or be damaged. Therefore, when the ambient temperature is much higher than the set temperature of the water tank (greater than 10 degrees), it is strictly forbidden for the laser system to be in a state where the water cooler is only turned on and the laser head is not working. In this state, the following steps are recommended:

When starting up, turn on the water chiller first, and when the temperature of the chiller is lower than 30°C, turn on the power and slowly adjust the current to about 10A; Adjust to the working current (about 35A).

    When shutting down, first reduce the current slowly to about 10A and stop the power output, turn off the power, and then turn off the water cooler as soon as possible. If you are not working at the maximum current, you can properly increase the cooling temperature of the refrigerator (but not higher than 25°C). Be sure to use the laser system equipment in the specified environment (air conditioning should be installed in the southern operating environment).

Lamp pumped

     YAG laser is a solid-state laser with a wavelength of 1.064um in the infrared frequency band. It uses a krypton lamp as an energy source (excitation source). ND: YAG (Nd: YAG laser. Nd (neodymium) is a rare earth element, and YAG stands for yttrium aluminum pomegranate Stone, whose crystal structure is similar to ruby) as the medium for generating laser light, the excitation source emits incident light of a specific wavelength, which promotes the population inversion of the working substance, releases the laser light through the energy level transition, and amplifies the laser energy and shapes and focuses it to form a laser. Laser beam used.

     Although the lamp-pumped laser marking machine is a very stable device. However, when customers use it, due to reasons such as not paying attention to details, it may cause some minor faults, so let's take a look at the two most common types:

Fault 1. The laser intensity drops, and the marking is not clear enough

Fault 2. The krypton lamp cannot be triggered

Troubleshooting method for fault 1:

1. Whether the laser resonator changes; fine-tune the resonator lens. Make the output spot the best;

2. The acousto-optic crystal is offset or the output energy of the acousto-optic power supply is low; adjust the position of the acousto-optic crystal or increase the working current of the acousto-optic power supply;

3. The laser entering the galvanometer deviates from the center: adjust the laser;

4. If the current is adjusted to about 20A, the photosensitive intensity is still not enough: the krypton lamp is aging, replace it with a new lamp.

Troubleshooting method for fault 2:

1. Check all power cables;

2. The high-voltage krypton lamp is aging, so replace the krypton lamp of the laser marking machine.

YAG laser marking machine

    The diode-pumped laser marking machine uses a semiconductor laser diode (side or end) with a wavelength of 0.808um to pump the Nd:YAG medium, so that the medium produces a large number of inversion particles and forms a giant pulse laser with a wavelength of 1.064um under the action of the Q switch. output, high electro-optical conversion efficiency. Compared with the lamp-pumped YAG laser marking machine, the semiconductor-pumped laser marking machine has better stability, power saving, no need to change the lamp, etc., and the price is relatively high.

Fiber laser marking machine

    It is mainly composed of three parts: laser, oscillating lens, and marking card. The laser marking machine produced by fiber laser has good beam quality, its output center is 1064nm, and the life of the whole machine is about 100,000 hours. Compared with other types of laser marking The life of the device is longer, and the electro-optic conversion efficiency is more than 28%. Compared with other types of laser marking machines with a conversion efficiency of 2%-10%, it has a great advantage, and it has outstanding performance in terms of energy saving and environmental protection.

CO2 laser marking machine

   The CO2 laser is a gas laser with a wavelength of 10.64um in the far-infrared frequency band. CO2 gas is used to fill the discharge tube as the medium for generating laser light. When a high voltage is applied to the electrode, a glow discharge is generated in the discharge tube to release gas molecules. The laser is emitted, and the laser energy is amplified to form a laser beam for material processing.

UV laser marking machine

   Ultraviolet laser marking machine is equipped with deep ultraviolet laser, imported high-speed scanning galvanometer system, etc.; because the focal spot of ultraviolet laser marking machine is extremely small, and the processing heat-affected zone is very small, ultraviolet laser marking machine can perform ultra-fine marking, special Material marking, UV laser marking machine is the first choice for customers who have higher requirements on marking effect. Ultraviolet laser marking machine has the characteristics of high electro-optical conversion rate, long service life of nonlinear crystal, stable operation of the whole machine, high positioning accuracy, high operating efficiency, and modular design for easy installation and maintenance. In addition, it can be equipped with a two-dimensional automatic workbench to realize multi-station continuous marking or large-format marking.

Green laser marking machine

     The green laser marking machine is developed by adopting the most advanced laser pumping technology (side pumping or end pumping) with a wavelength of 532nm in the world. Customers can freely choose the pumping type according to the characteristics of their own products. The electro-optical conversion rate is high, which can reach more than 30% or 45%, and the power consumption of the whole machine is low, and the protection is very good. It has a wide range of uses: marking a variety of metals (such as stainless steel, copper alloys, etc.) Lens, etc.) logo or scale marking, but also suitable for ceramic drilling, direct molding of high-temperature PCB boards, etc. Compared with similar products, it has a very high cost performance, and is more suitable for some occasions that require finer and higher precision. Compared with similar products, it has a very high cost performance. His price is even higher.

Yttrium aluminum garnet type

    The activation medium is solid, and the laser emits 1060nm light waves close to the infrared region. There are two types: continuous type and light pen type. By changing the output energy, laser beams with different intensities can be obtained. The marking process includes coking method (dark color marking), foaming method (light color marking) and ablation method (engraving marking), and the marking quality is excellent.

Excimer type

    It can emit light waves in the ultraviolet range (100-400nm), and the activation medium is composed of a mixture of helium, argon, krypton, neon gas and chlorine, fluorine, bromine, iodine and other halogens.

The difference

     Diode-pumped lasers produce less waste heat and require a small cooling system. Generally, only one chiller is sufficient. Lamp-pumped lasers generally require more than two chillers, and a larger water pump is required to provide greater cooling. cooling water flow. Therefore, the running noise of its running lamp-pumped laser marking machine is relatively large, and at the same time, the huge chiller will generate more heat, especially in the southern summer, when the ambient temperature is high, these excess heat will make the working environment of workers worse, or More air-conditioning systems are required to regulate the temperature of the working environment, increasing production costs.

Marking effect is better

     Since the semiconductor diode almost only emits light of one wavelength, the monochromaticity of the laser pumped by it is better, and the laser mode is better. A good laser mode will make the focused laser spot smaller and more energy efficient. Concentrate to achieve better marking effect;

     Both semiconductor and lamp-pumped lasers use ND:YAG (neodymium-doped yttrium aluminum garnet) crystal as the material for laser generation, which can convert 808nm visible light into 1064nm invisible laser, but another more critical part of the output laser is The most important factor is the pumping source that makes the crystal rod output laser. Semiconductor pumping uses semiconductor diodes to emit 808nm light waves; while lamp pumping uses the light emitted by krypton lamps to pump, but the light emitted by krypton lamps has a wider spectrum. , but there is a slightly larger peak at 808nm, and the light of other wavelengths finally becomes useless heat and dissipates.

Small size

    The semiconductor laser module itself is small in size and its laser mode is good, so the volume of the semiconductor pump laser of the CNC machine tool is nearly one-third smaller than that of the lamp pump laser.

Maintenance-free, no need to change krypton lamps

    The semiconductor diode has a long life, and its rated working time is more than 10,000 hours, while the life of the krypton lamp is only a few hundred hours (generally about 400-600 hours), so the lamp-pumped laser needs to be replaced after working for a period of time. , especially for metal marking, the energy required is large, and the life of the krypton lamp will be more affected. Therefore, semiconductor pump lasers for CNC machine tools are also called maintenance-free lasers, which means that they work without consumables and do not require maintenance for a long time.

Power saving

    Due to the high conversion efficiency and good mode of the semiconductor pump, it is easier to focus high-energy and smaller-area light spots, and when marking the same object, it requires less external energy. At the same time, the waste heat generated by it is much smaller than that of a lamp-pumped laser, which determines that it does not require a huge cooling system like a lamp-pumped laser. So diode-pumped laser systems consume much less power than lamp-pumped systems.

Solution

    Marking machine solutions: ①Whether the laser resonant cavity changes; fine-tune the resonant cavity lens. Make the output spot the best; ②The acousto-optic crystal is offset or the output energy of the acousto-optic power supply is low; adjust the position of the acousto-optic crystal or increase the working current of the acousto-optic power supply; ③The laser entering the vibrating mirror is off-center: adjust the laser; ④If the current adjustment The photosensitive intensity is still not enough to about 20A: the krypton lamp is aging, replace it with a new lamp.

    Solutions for the marking machine: ① Check all the power cables; ② The high-voltage krypton lamp is aging, replace the krypton lamp. Precautions for operating the laser marking machine ①It is strictly forbidden to start the laser power supply and Q-switching power supply when there is no water or the water cycle is abnormal; ②The Q power supply is not allowed to work without load (that is, the output terminal of the Q-switching power supply is suspended); Check the galvanometer switch and key switch again; ④ It is not allowed to start other components before the krypton lamp is ignited to prevent high voltage from entering and damaging the components; Breakdown; ⑥Keep the inner circulating water clean. Clean the water tank regularly and replace it with clean deionized water or pure water.

Specific Notes

    First, the laser marking machine should be used as far as possible in a dust-free, 10°C-35°C environment to keep the optical components dry and dust-free. It is usually necessary to ensure a separate closed workshop, to ensure a constant temperature in the room, to have floor paint or ceramic tiles on the floor, and to install air conditioners;

    Second, the customer must provide the main power supply to support at least 2500W AC single-phase power supply, and the main power cord of the equipment provided by our company must be installed on an air switch for protection, and the use of triangular plugs is strictly prohibited;

    Third, the main power supply provided by the customer must have a ground wire, and virtual connections are strictly prohibited!

Fourth, it is best to use deionized water for the cooling water in the circulating water tank. If there is no deionized water, distilled water can be used instead; the circulating cooling water should be replaced in time after a period of use (it is recommended to change the water at least once every two weeks), so as not to affect the laser efficiency. 

Krypton lamp use

    Turn off the water cooler and laser power. Open the upper three chamber covers, take out the lamps or crystals to be replaced, put them in after replacement, and install the chamber covers. Turn on the water cooler, laser power supply, and adjust the current of the laser power supply to about (15~20) A. Place a small piece of wood or black paper between the front diaphragm and the beam expander, and you should see the spot formed by laser ablation. If not, slightly adjust the three knobs of the front film holder until the light spot appears. Turn off the laser power.

Special attention: the time to replace the krypton lamp For example: when the new krypton lamp is marking, the current value is 20A. After using it for a period of time, if the current value is increased to 25A and the marking still cannot be done normally, the krypton lamp should be replaced.

Laser application

     Laser technology is one of the four major scientific and technological inventions in the 20th century, which are as famous as atomic energy, semiconductors and computers. Laser has good monochromaticity, coherence, and directivity, and can accumulate high energy density in a small area, which is especially suitable for material processing. At the end of the 1970s and the beginning of the 1980s, a brand-new laser application technology-laser marking technology quietly emerged in the world, and was rapidly industrialized, becoming one of the largest application fields of laser processing. Laser marking technology uses computer-controlled laser as the processing method. The basic principle is: the computer-controlled high-energy-density focused laser beam acts on the surface of the workpiece that needs to be marked, such as mechanical parts, electronic components, and instruments, according to a predetermined trajectory. , so that the surface material can be instantly vaporized or chemically changed to change the color, and the characters and patterns with a certain depth or color can be etched, so as to leave a permanent mark on the surface of the workpiece.

     As a modern precision processing method, laser marking technology has unparalleled advantages compared with traditional processing methods such as corrosion, EDM, mechanical scribing, and printing:

1. Using laser as the processing means, there is no processing force between the workpiece and the advantages of no contact, no cutting force, and small thermal influence, which ensures the original precision of the workpiece. At the same time, it has wide adaptability to materials, and can make very fine marks on the surface of various materials with very good durability;

2. The space control and time control of the laser are very good, and the freedom of the material, shape, size and processing environment of the processing object is very large, and it is especially suitable for automatic processing and special surface processing. And the processing method is flexible, which can not only meet the needs of laboratory-style single-item design, but also meet the requirements of industrial mass production;

3. The laser engraving is fine, and the lines can reach the order of millimeters to microns. It is very difficult to imitate and change the marks made by laser marking technology, which is extremely important for product anti-counterfeiting;

4. The combination of laser processing system and computer numerical control technology can form an efficient automatic processing equipment, which can print various characters, symbols and patterns, and it is easy to use software to design marking patterns, change the marking content, and adapt to the requirements of modern production with high efficiency and fast pace;

5. Laser processing has no pollution source and is a clean and pollution-free high-environmental protection processing technology;

Laser marking technology has been widely used in all walks of life, and has opened up broad prospects for high-quality, high-efficiency, pollution-free and low-cost modern processing and production. With the continuous expansion of modern laser marking application fields, the requirements for miniaturization, high efficiency and integration of laser manufacturing equipment systems are also higher.

Common problem

     Occasionally, there will be problems with the laser marking machine. If the problem cannot be solved in time, it may affect the delivery time of the product. In fact, although the maintenance of the laser marking machine is more troublesome, the principle is very simple, and there are some problems that we can solve by ourselves. :

Fault 1: The laser intensity drops, and the marking is not clear enough

Solution:

1. Whether the laser resonator changes; fine-tune the resonator lens. Make the output spot the best;

2. The acousto-optic crystal is offset or the output energy of the acousto-optic power supply is low; adjust the position of the acousto-optic crystal or increase the working current of the acousto-optic power supply;

3. The laser entering the galvanometer is off-center: adjust the laser;

4. If the current is adjusted to about 20A, the photosensitive intensity is still not enough: the krypton lamp is aging, replace it with a new lamp.

Fault 2: The krypton lamp cannot be triggered (refer to the NTP power supply manual)

Solution:

1. Check all power cables;

2. The high-voltage krypton lamp is aging, replace the krypton lamp.

Fault 3: One long and three short alarms when online

There are several reasons and elimination methods as follows

1. The software does not work, the main board is loose, please turn on the computer and reinsert it.

2. When the Q drive alarm light is on, check whether the 37-pin and 15-pin are loose, and whether the Q switch has normal water flow.

3. When the laser power alarm light is on, check whether the chiller is turned on and whether the lamp is damaged (if damaged, the lamp needs to be replaced).

Fault 4: The reason why there is no light

There are several reasons and solutions

1. The optical path screw of the whole machine is loose, and the screw needs to be tightened.

2. Whether there is too much dust in the gun body to prevent the gun endoscope from being damaged. If found, the gun endoscope must be replaced.

3. If the chiller is turned on for a long time without turning on the laser power supply, it will cause freezing and no light. It is necessary to turn off the power system of the whole machine for 1 hour and then turn it on again.

4. The lamp tube is aging or the laser power drops, so the lamp tube must be replaced.

5. After working for a long time, the laser power drops, and the bottom cover of the gun body needs to be adjusted on the inner mirror of the gun.

Fault 5: Computer Common Problems

There are several problems

1. It must be checked whether the graphics during processing are complex.

2. Do not connect the internet cable to the online computer, it controls the laser system independently.

3. It runs slowly, please don't be too impatient at this time, so as not to crash.

4. Please pay attention to prevent viruses to prevent system errors.

Fault 6: The XY axis of the workbench is not on time

1. Is the screw of the table slide rail loose?

2. The glass on the workbench is determined by the customer's requirements. It can be replaced with an iron plate or a plexiglass plate, and the balance function can be adjusted under the glass.

3. The right side and upper and lower corners of the workbench can be equipped with an electronic ruler, and the electronic ruler can be installed to facilitate the needs of customers.

4. The screw holes on the workbench are convenient for customers to locate, which is negated by the product.

Fault 7: Jumping during operation, and the position is roughly fixed

The following reasons and elimination methods:

1. The timing belt is stretched and deformed for a long time ----- replace it with a new one.

2. There is dirt in the pinion groove of the large and small gear reduction wheel device -----clean the dirt in the pinion gear groove.

3. There is dirt on the pinion gear of the transmission shaft -----clean up the dirt on the gear groove of the transmission shaft.

Fault 8: The starting point and end point of the closed line are not closed

There are several reasons:

1. The timing belt is too loose ----- tighten the timing belt.

2. The connection between the gear and the shaft is loose ----- retighten.

3. The X-axis guide rail and the Y-axis guide rail are not vertical ----- adjust the verticality of the X and Y-axis guide rails.

4. There is a large gap between the slider and the guide rail -----replace the slider.

Fault 9: If you encounter impenetrable situations

There are several reasons and elimination methods:

1. The vertical light is not correct --- adjust the vertical light, and readjust the light path if necessary.

2. Improper focus adjustment ---- re-adjust the focus.

3. The voltage is unstable, the voltage is low, the laser current is too small, replace with a larger voltage regulator, and increase the laser current output.

4. The light outlet of the gas nozzle is blocked by sputtering - clean the gas nozzle.

5. The protective air is blocked---clean the air pump, air filter, and check the air circulation path.

6. The reflector and focusing lens are polluted - clean the reflector and focus lens with cleaning solution.

7. The power of the laser tube has dropped - replace the laser tube.

8. The light control module on the motherboard is faulty---replace the motherboard.

9. There is a potentiometer device, the potentiometer setting is too small or its own fault - adjust the potentiometer setting or replace the potentiometer.

10. The energy setting in the software is too small----enhance the energy.

11. Material problem - please choose the appropriate material

12. The focusing lens is cracked or the focusing effect is poor - replace the focusing lens.

13. There is too much dirt in the laser tube and the heat dissipation effect is poor - use pure water.

Operational matters

1. It is strictly forbidden to start the laser power supply and Q-switching power supply when there is no water or the water cycle is abnormal;

2. The Q power supply is not allowed to work without load (that is, the output terminal of the Q-modulated power supply is suspended);

3. If there is an abnormal phenomenon, first turn off the vibrating mirror switch and the key switch, and then check;

4. It is not allowed to start other components before the krypton lamp is ignited to prevent high voltage from entering and damaging the components;

5. Note that the output terminal (anode) of the laser power supply is suspended in the air to prevent ignition and breakdown with other electrical appliances;

⑥Keep the internal circulating water clean. Clean the water tank regularly and replace it with clean deionized water or pure water.

Use and Replacement of Krypton Lamps

Turn off the water cooler and laser power.

Open the upper three chamber covers, take out the lamps or crystals to be replaced, put them in after replacement, and install the chamber covers. Turn on the water cooler, laser power supply, and adjust the current of the laser power supply to about (15~20) A. Place a small piece of wood or black paper between the front diaphragm and the beam expander, and you should see the spot formed by laser ablation. If not, slightly adjust the three knobs of the front film holder until the light spot appears.

After the laser is debugged, the three knobs of the front diaphragm holder should be adjusted repeatedly to make the light spot the strongest. If the laser is too strong and the brightness is too high to be observed, the power current can be reduced.

Turn off the laser power.

Special attention: the time to replace the krypton lamp.

    The krypton lamp in the laser factory indicates that the service life of the krypton lamp is 300 hours, but due to different user conditions, the above time cannot be used as the only basis for replacing the krypton lamp. As the use time increases, the luminous efficiency of the krypton lamp decreases, and the laser output also weakens accordingly. In order to obtain sufficient laser output, many users increase the current of the laser power supply to increase the luminescence of the krypton lamp, which accelerates the aging of the krypton lamp. , forming a vicious circle, sometimes leading to the phenomenon of fried lamps. In order to prevent this phenomenon from happening, we recommend that users decide whether to replace the krypton lamp according to the following method.

    When replacing a new krypton lamp, the value of the ammeter of the laser power supply during normal marking must be recorded as the standard current value.

    When the krypton lamp is gradually aging, increase the current output of the laser power supply, but the value of the ammeter should not exceed 1.25 times the standard current value.

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