I’m sure I’ve missed this explanation somewhere in the forum, but I seem to be having an issue with exporting higher DPI PNG’s versus uploading SVG’s created in Inkscape. I’m hoping there’s a post somewhere that explains my issue better than I’m about to right now… :joy: So I’ve been doing engravin…

I only know that 600 DPI would be great if the dot size were that small, but putting an array of 250 dpi dots, at 600 dpi would mean that all the dots would be overlapping each other and then some, making not more detail, but less. The Laser could have as close to zero radius as you could figure but…

I might not be the best person to ask. The only time I feel it’s necessary to use a really high DPI on an image when engraving is when I’m engraving “Glowforge” on a grain of rice. (No kidding.) :smile: High DPI is important for getting realistic resolution in printed photographs, but I believe i…

[image] Jules: when I’m engraving “Glowforge” on a grain of rice. (No kidding.) :smile: I would really like to see images of those! Heck, @Dan would love to have a photo of a batch of rice with Glowgorge engraved on each one!

[image] rbtdanforth: I would really like to see images of those! [image] Drop the mic sunglasses Made on a Glowforge Challenge accepted, and…Boom. sunglasses [image] Yes folks…that’s a grain of rice. smile [image] [image] The rice grains do not change color whe…

DPI = LPI * 2 Or. LPI = DPI / 2

If you used wild rice or red rice (from Oriental markets) the shell would make the cuts stand out nicely :smile:

I can’t speak to Inkscape (so, basically, I’m not helping answer the question at all), but in Illustrator when I rasterize something embedded in an SVG for engraving purposes I always rasterize at 600 DPI. It doesn’t hurt anything, as far as I can tell. The Glowforge software is welcome to use only …

If you’re using a LPI that exceeds half of your DPI, you’re asking the system to interpolate data, aren’t you? Same as scaling an image. I’m in the camp of I don’t believe a high-res image really impacts the ability to process the file because it’s going to spit back out the data needed to do the j…

Regardless of the DPI you use in your source image the GF will have to resample and interpolate because the actual LPI numbers are not integers and cannot be expressed exactly in decimal fractions. They are numbers like 1354.6666666… And yes the output file size is not affected by the input file DP…

[image] jbmanning5: I’m in the camp of I don’t believe a high-res image really impacts the ability to process the file because it’s going to spit back out the data needed to do the job. I can’t speak intelligently about how the GUI processes things, but in my experience this is true. I save …

Export PNG versus SVG Upload

Community Support

Jules February 20, 2018, 5:46pm 5

(I actually sent a few of those to Dan, Tony and Mark for the museum.