Glossary
DPI
Engraving dot resolution
DPI (dots per inch) is the resolution of the source image feeding a raster engrave. It pairs with LPI: sending a 600 DPI photo to a 254 LPI job wastes pixels; sending 100 DPI to 318 LPI wastes line density.
A sane pipeline: prepare art at roughly the LPI you will run, then let dithering translate grayscale to dots.
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