Laser marking is to use a laser beam to make permanent marks on the surface of various substances, to make the evaporation of the surface substances expose the deep substances, or to cause the chemical and physical changes of the surface substances to carve traces, or to burn off some substances through the light energy to show the required etched graphics and characters.

Classification of laser marking machines

There are various colors of light, and the same is true of the laser beam. Different lasers produce different laser beams and process different materials. At present, the most common lasers can be divided into the following categories.

1. Fiber laser, the laser is mixed with rare earth elements as the laser gain, which can add about 30% of the original light energy conversion. The marking efficiency of optical fiber laser marking machine is more than 6 times of that of semiconductor laser marking machine. At the same time, the comprehensive performance is better than the traditional laser marking machine. Optical fiber laser marking machine is mainly used in metal marking processing, and it can also process some non-metal.

2. CO2 laser belongs to gas laser, and it is also the earlier type of machine in laser marking machine. Due to its low cost and good performance, it is widely used now. The main application field is non-metallic processing.

3. UV laser, the unique feature of UV is that the reaction of light to substance is different from other lasers. UV laser marking machine can break the structure of substance without generating heat when marking. The beam of UV laser marking machine is very fine, the power is very low, and there is almost no thermal effect on the workpiece. It is mainly used in marking processing with high requirements.

4. YAG laser marking machine is one of the solid-state lasers, and also a laser with superior performance. It fitted with high-speed scanning lens, image scanning can be completed in a very short time, and exquisite marks can be completed; the design is reasonable, the workmanship is fine, and the appearance is high-grade; according to the user's requirements, CNC rotating head, automatic fixture, loading and unloading production line can be configured; automatic completion date, serial number, and bar code can be marked; data communication and networking can be carried out. However, due to the high price and not easy for maintenance, most of them are replaced by fiber laser marking machine.

5. Semiconductor laser marking machine uses semiconductor materials as working materials. Its application field is basically the same as fiber laser and YAG laser, but its comprehensive performance and span-life are not as good as fiber laser marking machine, so a large part of it is also replaced by fiber laser marking machine.

The marking efficiency of the laser marking machine is determined by the absorption of the laser beam to the material. Different light has different reaction to the material, so different laser marking machines are applied in different industries.

Laser marking machine is usually classified as the above types. Except for some different optical accessories and different organization principles, most other configurations can be divided into the following categories.

The laser marking machine consists of the following supporting systems:

1. Focusing system

The function of the focusing system is to focus a parallel laser beam at a point. F-θ lens is mainly used. The focal length of different f-θ lens is different, and the marking effect and range are also different. The fiber laser marking machine adopts imported high-performance focusing system. The focal length of the standard lens is f=160mm, and the effective scanning range is Φ110mm. Users can choose the type of lens according to their needs.

2. Metal plate

The model architecture of the whole equipment.

3. Computer control system

The computer control system is the center of control and command of the whole laser marking machine, and also the carrier of software installation. Through the coordinated control of the acoustooptic modulation system and galvanometer scanning system, the marking process of the workpiece is completed.

Successful application of Jawest 10.4 inch industrial tablet PC in laser marking machine industry.

Jawest intelligent 10.4 inch fanless industrial tablet PC uses Intel J1900 on-board 2G memory, 32g solid-state disk, 2*RS232, 4*USB. It has been successfully applied to laser marking machine, with built-in customer Bluetooth transmission module, or through serial port and laser marking machinet communication. Friendly touch screen operation interface makes marking easier. High stability and integration of Jawest intelligent tablet PC ensure the reliable performance of laser marking machine.

4. Laser power supply

The laser power supply of laser marking machine is a device which provides power for laser. Its input voltage is AC220V AC. It is installed in the control box of the marking machine.

5. Laser

This is the core part of laser marking machine. According to different models, it usually has many series of lasers: fiber, UV, CO2, YAG, semiconductor,. etc. The output laser mode has a long service life and is designed and installed in the marking machine shell.

6. Galvo & field lens scanning system

Galvo scanning system is composed of optical scanner and servo control. Vibration lens consists of stator, rotor and detection sensor. The whole system is designed and manufactured with new technology, new material, new process and new working principle.

The optical scanner adopts a servo motor with a moving magnetic deflection working mode. The optical scanner is divided into X-direction scanning system and Y-direction scanning system. Each servo motor is controlled by its computer to send digital signals to control its scanning trajectory.

7. Marking control software

The software of laser marking machine is used to control the marking parameters, control the application interface of debugging, and operate all the actions of marking.