With the continuous development of laser technology, Laser processing on materials is already very common. When we want to process a certain depth on the work piece, we need to use a 2.5D laser marking machine for processing, so how does it achieve deep engraving processing? Let’s discuss how the 2.5D laser marking machine achieves deep engraving processing, and understand the hardware structure and laser processing method of the 2.5D laser marking machine.
2.5D laser marking machine is a kind of laser marking machine with local depth processing control. The difference from 2D processing is that 2.5D marking machine can not only process on the plane, but also process to a certain depth on the surface of the material. That is because the marking machine can adjust the focal depth of the laser and engrave at different levels, thus presenting a sense of depth similar to 3D engraving, but the engraving process of 2.5D marking machine is still processed on the basis of the plane.
The hardware structure of the 2.5D laser marking machine mainly consists of three parts: laser source, galvanometer scanning system, and control system. Usually, the laser source is mainly based on fiber lasers, and is processed on aluminum and steel materials. Of course, it is easier to process the material by selecting a suitable laser source according to the material being processed. The galvanometer scanning system is just an ordinary 2D galvanometer, and does not require the use of expensive 3D galvanometers, which is more economical. The control system is divided into two parts: 1. The laser control system composed of the EZCAD3 board. 2. The electric Z-axis, which is controlled by the intelligent control board to rise and fall the electric Z-axis. The automatic focus function of the laser marking machine is controlled by this system.
How to achieve deep engraving? Take aluminum material as an example to achieve deep engraving. Load the nine-point correction on the EZCAD3 software and enable the Z-axis function. If your Z-axis is autofocus, just click on the autofocus and the galvanometer will move to the focus. Then, import the 3D model that needs to be marked, and the supported format is (.stl file). After importing, we can adjust the direction and angle of the model on the software, and place the zero plane on the top of the model. We have adjusted the model, and then we need to slice the model, which means dividing the entire model into hundreds of layers, and the thickness of each layer is the same. When you need a deeper processing effect, you can do it by increasing the number of slices. The last step is to adjust the marking parameters. Usually, you need to test the marking parameters before starting processing. For example, draw a rectangle, and the marking parameters, filling, and the size of the rectangle are consistent with the model. By observing the marking effect of the rectangle, changing the marking parameters, until there is no break and the work piece surface can be cleaned as before using low-power cleaning, it means that the parameters are good, then we can directly process the model. After clicking on the mark, the laser will first process the first layer of the model, and then the second layer. Each time a layer is processed, the axis will automatically move down one layer. The distance the axis moves one layer comes from the thickness of one layer when the model is layered. This ensures that the sample has a certain depth effect after processing. At the same time, using a 2.5D laser marking machine can also achieve the effect of protruding samples. It is just that after completing the model slicing, add a rectangular outer contour to the model, then the material will change when processing. The laser will first clear the surroundings of the model and retain the model itself, so as to achieve the effect of protruding the model. This processing method is relief.
The above is the processing application of 2.5D laser marking machine. Because it can change the laser focus through the Z axis without using a 3D galvanometer to complete the 3D processing of the work piece, based on this feature, the 2.5D laser marking machine will play a more important role in future industrial manufacturing.
