Calculate the focal difference: Material for the fiber laser source as starting point
It's critical to know which material will be focused first to calculate the final z-offset. As we said earlier, we recommend starting with the material that will need the fiber laser source. In this situation, the metal clip will use the fiber laser, so we will start with it.
Between the two materials' surfaces is a focal difference of 3 mm. To level the focal difference and take into account the z-offset, we use this formula:
3 mm (tolerance/height difference between materials) - 2 mm (determined z-offset) = 1 mm
Note: Because the work table must be raised to account for the height difference, we set a 'minus'. The final calculated settings are:
- Metal clip (fiber engraving): P: 80%, v: 50%, 20 kHz, z-offset: 0mm
- Wooden casing (CO2 engraving): P: 50%, v: 60%, 1000dpi, z-offset: -1mm