Laser engraving for large surfaces: De-focusing recommended
For laser engraving large surface areas with laser, intentionally de-focusing usually works better than processing the material “in focus”. Set the z offset to between 2 and 7 mm, depending on the power of your laser machine and the graphic, in order to achieve a more even result. By de-focusing, grooves are avoided and the end result has a smoother surface. The chosen lens also plays a role here: for large surfaces, it’s best to use lenses with larger focal lengths. For very fine details (e.g., a 4 point font), we recommend not using any z offset.