De-Focus when Engraving a Large Surface
When engraving large TroLase workpieces, you can generally achieve better results by de-focusing the laser. To achieve definition in your designs, a z-offset of between 2 and 7 mm is recommended (depending on the laser power and machine resolution). De-focusing the laser beam reduces the formation of grooves, creating a smoother engraving finish.
The specific lens used is also important. It is advised that you use a lens with a greater focal length to engrave larger laminate workpieces. When it comes to very intricate details (e.g., 4 pt font), we do not recommend using a z-offset.