“Can metal be engraved with a CO2 laser, too?”
When using CO2 lasers, you need to apply a special paste or spray to the workpiece prior to any laser processing. It then needs to be left to dry before the material can be effectively marked by the laser. The marking is then burned into the metal with the laser beam. After the laser process, the residue of the paste or spray needs to be washed off.
This operation requires a lot of laser energy, and the beam needs to be moved at a very low speed. Some metals can have a high-contrast finish by using this method, but it should be noted that not all metals are suitable for paste/spray marking – always do your research before committing to a material! The pastes and sprays are also very expensive, and the entire process is very time consuming.
However, metals can be marked directly with a Fiber laser, and a clear distinction is made between engraving, annealing marking and coating ablation. The machines in the Speedy flexx series are all equipped with a CO2 laser as well as a Fiber laser, so you can use both sources in a single job without having to manually change the settings (laser source, lenses, focus). JobControl® laser software makes this easy: just assign the preferred laser source to each colour of the graphic and you’re ready to go.