I have a Shapeoko 3 with a JTech 2.8W Diode – I’ve successfully burned text / graphics but this is my first run in with photographs.
I created a file with some test faces and have been playing with different grayscale burn settings but not having any success getting an acceptable burn on MDF (results are even worse with Birch plywood).
The image is .8661" x .9449", at 145 DPI which is about a 0.007 line interval. The source is exactly the same size and DPI converted to grayscale in Photoshop. Output is also the same size, it is not being resized in Lightburn.
I’m using Grayscale mode now… not opposed to one of the other options, it just seemed that my PNG is made up of gray dots and the laser should be able to reproduce that… maybe I’m wrong on how it works.
Settings have been in the 20% min-100% max around 40-60IPM… so I could be way off there also.
I’ve attached the source picture as well as a photograph of my poor results. Any tips or assistance would be appreciated!