< img height="1" width="1" style="display:none" src="https://www.facebook.com/tr?id=1029820091747592&ev=PageView&noscript=1" /> Common Queries about CO2 Laser Marking Machines:You Need to Know - Laserscheme


Common Queries about CO2 Laser Marking Machines:You Need to Know

In recent years, CO2 laser marking machines have become important tools in industrial manufacturing. They are widely used in various industries, such as food and beverage, pharmaceuticals, cosmetics, electronics, leather goods, textiles, ceramics, and more. These machines enable the printing of information such as dates, batch numbers, barcodes, QR codes, patterns, and text on products. Whether you are new to CO2 laser marking machines or have doubts about their operation and processing, we hope the following answers can help you.

Difference between CO2 laser marking machine and CO2 flying laser marking machine: CO2 laser marking machines are used to mark stationary objects with laser beams, delivering precise and high-quality marking results suitable for applications that demand high accuracy. On the other hand, CO2 flying laser marking machines are designed to mark moving objects on production lines, enhancing productivity and saving labor costs, making them ideal for large-scale production. The prices of CO2 laser marking machines and CO2 flying laser marking machines may vary, with the latter generally being more expensive due to higher technical requirements and a more complex control system. However, both types of machines have similar lifespans and maintenance requirements, needing regular air replenishment and cleaning. CO2 laser marking machines should be operated within a temperature and humidity range of 0-40°C and 30% ≤ RH ≤ 85%. If these limits are exceeded, an air conditioning system should be installed.

The difference between CO2 flying laser marking machine and CO2 marking machine:

Both CO2 laser marking machines and CO2 flying laser marking machines typically employ industrial-grade RF CO2 lasers. The CO2 flying laser marking machine can mark various non-metallic materials such as plastics, glass, leather, and paper. It finds extensive applications in industries like food and beverage packaging, alcoholic beverages, dairy products, garment accessories, leather goods, electronic components, pharmaceuticals, personal care products, tobacco, and chemical building materials. It is used to mark expiration dates, batch numbers, production shifts, manufacturer names and logos, and other text and graphics. However, it is important to note that CO2 laser marking machines can only mark non-metallic materials and cannot mark metals.

Possible Issues During Laser Marking Process:

  1. Red light adjustment for laser marking machine: The position for adding red light is after the laser emission, specifically before the beam expander. Ensure that the red light can pass through the beam expander. The smaller the spot size after the objective lens reaches the focal plane, the better the result. Adjust the position of the red light to the center of the galvanometer X-galvano lens and fix it. Re-calibrate the laser and beam expander. Perform further adjustments for the red light and Step 3.
  2. Insufficient visibility of the marking: You can try adjusting the marking speed to a lower value. Lower marking speeds result in clearer scans, meaning that the laser’s heating range is larger. By combining the marking speed and power, you can achieve more visible parameters, resolving the issue of insufficiently visible markings.
  3. Inverted text during laser marking: When encountering font misalignment issues with the laser marking machine, consider checking the following:
  • Open the software and select “Mirror X” in the parameter settings. If the problem persists, try the following:
  • Rotate or mirror the content to be marked within the software.
  • Some fonts in the software may not be suitable for typing certain characters, resulting in garbled or inverted symbols such as “口.” In such cases, font replacement is necessary.
  • If the software doesn’t have the aforementioned issues, you can check if there are any debris on the slide rails of the laser marking machine’s worktable. When the power is off, gently shake the cylinder head of the marking head in the X and Y directions to check for any looseness. If there are gaps, inspect the timing belt, timing belt tensioner, timing belt pulley, and motor shaft. Tighten or reconnect them if they are loose.
  • Check if the copper sleeve at the lower end of the laser marking machine’s marking head, which contacts the needle, is excessively worn. If there is significant wear, it needs to be replaced.
  1. The specific patterns of the laser marking machine may not be clear:
  • Check if the thickness of the forming plate is uniform, if the forming pressure is too low, if the temperature is too low, and if the machine accuracy is reduced.
  • Key points of process control: The thickness error of the template should be controlled within 0.01mm, and the hardness should be maintained between 230-280N/mm. Since the hologram is formed by applying pressure to the embossing roller to create interference fringes, insufficient hardness of the embossing plate can cause deformation or damage during the embossing process.

What issues should be noted?

  1. CO2 laser marking machines belong to Class 4 laser products and must avoid direct or indirect exposure of the laser beam to the eyes or skin. It is also important to prevent family members and children from approaching or touching the laser marking machine to avoid unnecessary harm.
  2. The optical components of CO2 laser marking machines are coated with a thin film. During cleaning, they should not come into contact with hard objects to prevent scratching.
  3. Laser marking machines should not be operated without materials present.
  4. When using gas cylinders, they should not be exposed to direct sunlight. When storing gas cylinders, ensure they do not press against electrical wires to prevent leakage. Stand on the side of the valve when opening it. Gas cylinders must be properly handled and protected during transportation.
  5. Laser marking machines operate with voltage. When equipment malfunctions, it should be immediately shut down and repaired by professional personnel or individuals authorized by the equipment supplier. Do not attempt to disassemble it yourself.
  6. Operators should not plug or unplug power plugs and interface cables, as this can easily damage the laser marking machine equipment or computer.
  7. CO2 laser marking machines must have good grounding to prevent static interference and electrical damage.


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