I’ve been engraving photographs on wood with Lightburn using the Longer Ray10 with great success and have developed techniques which seem to be universal with all photos. These differ considerably from the You Tube videos and also the manuals. At some point I intend to write up the techniques I’ve developed but right now I have a question. Say for example I engrave a photo (into wood) and get the various shadings the way I want them at a certain size (say for example 5" x 5"). If I then increase the engraving size to say 8" x 8" the engraving lightens. My engravings use the Newsprint dither pattern and settings of .08 for line interval . To get back to the same shading results I got on the smaller engraving do I modify the image to make it slightly darker? Another solution might me to increase Lines/inch using the line interval by making it a lower value … to say 0.07?
Please do post about your methods. Sorry but I cannot give your advice about the settings.
By increasing the size.you are decreasing the pixel density and essentially create more space between details. Likely you do need to change your LPI to accomodate but I couldnt tell you exactly a number.
I could imagine that you are having speeds set too high then. If you have a smaller image, the laser does not reach the desired speed as fast as desired, which lead to a darker burn (slower movement, same power = darker burn). If you increase the size, the laser has more travel distance to reach desired speeds. Just a theory, usually, I guess 5" should be enough distance to get to speed anyhow. But you could test reducing the speed and power to half and do it again. Then check if the pictures still differ.
If you need a place to put your guide, I would be happy to host it here as well: Specific guides - Diode Laser Wiki (it will last longer than in forums where it drops over time 
)
This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.