Choosing the right resolution has a huge impact on the final laser engraving result. Other important factors include the material being processed, the chosen graphic and the processing time.
Materials absorb energy during laser engraving. Due to the strong heating, the dots become larger and can overlap (= “dot bleed”). This is an important property for photo engraving. In order to counter this effect, the right resolution is crucial.
|wood, glass, textile, stone||lower resolutions: |
125, 250 and 333 dpi
|acrylic, TroLase materials, paper, cardboard||moderate resolutions: |
von 500 to 600 dpi
|stamps, metal, processing with fiber laser||higher resolutions: |
von 600 to 1000 dpi
The level of detail in the graphic determines the resolution. It is recommended to increase the resolution to 600 dpi despite the “dot bleed” described above. This allows even very fine details to be optimally engraved.
Higher resolutions increase the time that is needed for laser engraving.
To reduce engraving time a different resolution can be selected. Using large-scale laser engravings as the example, choose a lower resolution and compensate for the resulting line spacing with a higher Z offset value.
Consistent laser engraving result - 1/4 of the original processing time
The following example shows how you can engrave the same graphic at 500dpi with the same result at 125 dpi, produced in 1/4 of the time:
|Laser engraving machine: Speedy 360, 80 Watt, P=65%, v=50%|
|Resolution||125 dpi||250 dpi||333 dpi||500 dpi|
|z-Offset||+12 mm||+12 mm||+9 mm||+6 mm|
Exception: Laser engraving rubber stamps:
For this application a higher resolution will increase the energy density when laser engraving. If the stamp is engraved at 500 dpi, the laser engraving speed must be reduced in order to reach the recommended engraving depth of 1.1 mm. In contrast, engraving can be faster at a resolution of 1,000 dpi and thus saving time despite the higher resolution.
Have more questions about laser engraving or choosing the right resolution? Our laser support team are happy to help.