Fiber laser marking machine is a marking equipment that uses fiber laser to hit the laser beam on the surface of various materials, and makes the surface material undergo physical or chemical changes through light energy, thereby engraving permanent marks such as patterns, trademarks and text. .
The components of fiber laser marking machine include: fiber laser, laser vibrating mirror, field mirror, industrial computer, display, cabinet, control switch, power supply, scale and lifting shaft, etc.
1. Fiber laser: It is a laser that uses rare earth element-doped glass fiber as the gain medium. The principle is that the pumped light enters the gain fiber and is absorbed, thereby inverting the number of energy level particles in the gain medium. When the resonant cavity When the internal gain is higher than the loss, laser oscillation will be formed between the two mirrors to generate laser signal output.
2. Laser galvanometer: It is composed of X-Y optical scanning head, electronic drive amplifier and optical reflector. The signal provided by the computer controller drives the optical scanning head through the driving amplifier circuit, so as to control the deflection of the laser beam on the X-Y plane.
3. Field lens: A lens that works near the focal plane of the objective lens and can effectively reduce the size of the detector is called a field lens; it can improve the ability of the edge beam to enter the detector.
4. Industrial control computer: used to monitor and control the machinery and equipment, production process, data parameters, etc. used in the production process.
5. Scale and lifting shaft: control the distance between the marking machine and the workpiece.
The parameters of the fiber laser marking machine need to be adjusted according to the actual marking of the workpiece. The parameter adjustment skills are as follows:
1. Generally speaking, if the marking depth is not enough, you can adjust the field lens, power and marking speed and other three types of parameters. If there is a problem with the color depth, you need to adjust the frequency and its speed.
2. In the process of not confirming the parameters, first adjust a parameter according to the experience, and then judge whether to increase or decrease the power, increase or decrease the marking speed and other parameters according to the printing effect.
3. Marking power, in the parameter setting, the power is adjusted by percentage, the output power from 0 to 100% can be adjusted. Generally, the default parameter is 50% of the output power. The larger the output power is adjusted, the greater the laser output energy and the easier it is to drill deep. But how much output power should be adjusted should be selected according to your actual needs, because if the output energy is too large, the impact on the material will be greater. If you can achieve the effect you want, you don’t need to use more power, otherwise the load will be high for a long time If it works, it will have an impact on the service life of the laser.
4. Marking speed refers to the moving speed of the laser, which can be adjusted in the parameters. The marking speed of the workpiece is not only adjusted by the speed parameters, but also affected by factors such as marking depth and marking area. The function of the marking speed parameter is that the faster the speed is, the faster the marking speed is when other conditions are constant.
5. Filling is mainly used in closed graphics that are not related to each other. The filling types are: one-way filling, two-way filling, circular filling and optimized two-way filling, and the filling angle, line spacing and line margin can be adjusted.
