The correct resolution can drastically affect your engraving result. The material you use, the image itself and the engraving time all play an important part.
Workpieces absorb energy when laser engraved. Because of the high temperatures, the dots grow larger and may overlap (="dot bleed"). It is especially important to take this property into account when doing a photo engraving. The correct resolution is essential to avoid dot bleed.
|Used material||Preferred resolutions|
|wood, glass, textile, stone||lower resolutions: |
125, 250 and 333 dpi
|acrylic, TroLase materials, paper, cardboard||moderate resolutions: |
from 500 to 600 dpi
|stamps, metal, processing with fiber laser||higher resolutions: |
from 600 to 1000 dpi
Depending on how detailed your image is, we recommend that you increase the resolution to 600 dpi in spite of the aforementioned "dot bleed". This lets even the smallest of details be perfectly engraved.
The higher the resolution you choose, the more time it will take to laser engrave.
You can save time if you pick a different resolution. For example, if you are doing a large-scale engraving, you could pick a lower resolution and then use a higher Z-offset value to accomodate the resultant line spacing.
Consistent engraving result - 1/4 of the original processing time
View our sample to see how the same image can be engraved at 500dpi with the same result as 125 dpi in only a quarter of the time:
|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 for laser engraving rubber stamps:
With stamps, a higher resolution will raise the energy density during engraving. If you engrave the stamp at 500 dpi, then you need to reduce the engraving speed so that you can get the recommended engraving depth of 1.1mm. To contrast, engraving can actually be quicker at 1000 dpi, saving time in spite of the larger resolution.
Do you need extra tips on how to pick the correct resolution or have any more questions on laser processing? Our team of experts would be happy to assist.