Maintenance of laser marking machine and how to adjust the focus correctly

Author: Correct Pack -Laser Marking Machine Manufacturer

As industrial processing equipment, regular maintenance and maintenance should be carried out. This will not only maintain good performance, but also prolong the working life of the laser marking machine equipment. Although the degree of automation of the laser marking machine is relatively high, the inside is very large. Part of it is the mechanical movement of the slider, and mechanical movement is easy to cause wear and tear, which requires us to oil and maintain the UV laser marked slider. First, turn off the power of the machine and ensure that the machine is in a stopped working state. Secondly, use a professional removal tool to remove the lens on the slider. Be careful when removing the lens and pay attention to protecting the lens. Then, disassemble the guide rail Expose the connecting part between the slider and the guide rail. If the slider is short of oil, you will see that the ball is shiny at this time. When oiling, squeeze out a little lubricating oil in the needle tube, and use a wooden toothpick to add the oil to the gap, and then Roll the slider when refueling, let the lubricating oil stick to each ball as much as possible, after the oil is good, don't rush to reinstall the device, turn on the power of the device, enter the debugging mode, slow down its running speed, and let the movement slide Run the block slowly to see if it is in good condition and whether the lubricating oil is in place. After confirmation, reinstall the disassembled guide rail and lens. It is a new star in the current standard market. It not only has the characteristics of other laser marking machines, such as clear marking, fast marking speed, and no optical pollution. The laser marking machine has a smaller spot and can achieve ultra-fine marking. It has unique advantages in marking glass products and electronic components.

Good equipment requires good maintenance, so as to make the service life longer and bring more economic benefits. The same is true for other laser equipment: laser welding machines and laser cutting machines. First of all, before understanding the correct debugging method, let's popularize and understand the correct definition of focal length:. Focal length, also known as focal length, is a measure of the concentration or divergence of light in an optical system, and refers to the distance from the center of the lens to the focus of light concentration.

In the laser marking equipment, after the laser is shaped by the laser, it will irradiate the focusing field lens with a parallel beam. Most of the conventional laser marking equipment uses a convex lens. The convex lens is optically refracted to focus the parallel light beam to a focal point. The focal length surface is formed, and the vertical distance from the optical center point of the convex lens to the focal length surface is what we call the focal length. We generally use F= to represent its focal length. Most laser equipment will have a marking on the focusing field lens, for example: F= 163, F=254, etc., the focusing field lens is a very important optical accessory in laser marking equipment. As shown in the above figure, the parallel light generated by the laser will only be gathered together after being condensed and organized by the focusing lens, and it will play its decisive role. power. Common laser marking methods on the market include front focus and back focus. The first picture is dynamic front focusing, that is, the focusing step is placed before the deflection of the galvanometer, which can form a larger marking format, so I won’t go into details here, we focus on the latter, that is, rear focusing, the laser generates laser light and Incident to the galvanometer deflection lens, cooperate with the control software to form our preset marking pattern path, the galvanometer lens refracts the laser to the focusing lens, and focuses the energy to the focal length plane to complete laser engraving. From this picture, we can see that the laser The focused beam is like a tapered sharp needle, so if you want to make the energy of the laser sharper, you only need to shake the Z-axis of the laser marking machine up and down, and adjust it to the focal length plane, but we can’t see it from this picture. It is found that when the focused centripetal beam passes through the focal point, due to the characteristics of the laser (good monochromaticity, good coherence, good directionality, and high brightness), the beam will not end or change its phase. They will cross and continue to scatter, so if the laser focal length plane is too high or too low, the correct focal length plane will be missed. Only on the correct focal length plane, the laser spot is the smallest, the energy is the strongest, and the sound and color are the brightest after the laser reaches the object.

After we fully understand the theoretical knowledge related to the focal length of the laser, let's list a few conventional methods for finding the focal length:. The first method: continuous light emission test method. Draw the IC automatic laser marking mechanism on the marking software to make a square or circle of about one centimeter. After the regular filling, adjust the laser energy to a relatively large value in the laser setting parameter bar, and use a low frequency as much as possible, and then check Continuous marking Put a shield such as a metal business card on the laser projection position on the surface of the product, emit light continuously for marking, and shake the Z-axis up and down until the laser acts on the metal business card with the strongest energy, the clearest sound and the brightest color. The upper is the focal length. Test several times up and down to find a suitable focal length. This method is more suitable for 1064nm wavelength fiber laser marking machines, semiconductor laser marking machines, end-pumped laser marking machines, 355nm, 532nm The green light laser marking machine, etc., the carbon dioxide laser marking machine can find a piece of white paper, then draw a box in the marking software, continuously emit light and shake the Z axis, and the focal length surface is when the line on the paper is the thinnest.

The second method is to measure the focal length. After the equipment manufacturer notifies the focal length data of the current equipment, it can be recorded, and then after switching products each time, you can directly lean on the surface of the product with a steel ruler, and the scale value refers to a certain reference surface on the field lens, and shakes up and down to the scale data That’s right, this method is applicable to all laser marking machines, but there is a disadvantage that this method is not practical if the position of the product that needs laser engraving is concave or it is not suitable to be inserted into the steel ruler. Zhuhai Correct Pack is a well-known laser equipment manufacturer in China. It has been focusing on the development and production of laser equipment for 12 years, providing customers with a complete set of laser equipment solutions, and creating cost-effective laser equipment. Main business: UV, co2, fiber laser marking machines, laser radium engraving machines And other cost-effective laser equipment, national service hotline: 400-0098-266https://www.xmslaser.com/.