I wanted to share my first experimental project, that I just completed last night. It’s a celtic knot etched onto a leather iphone case (the one apple sells). I thought I’d share it and my settings so that if anyone else is interested they can try it for themselves.
Here’s what it ended up looking like:
How I did it:
I searched around for a celtic knot design I liked, and ultimately found one on this page: http://www.ancient-symbols.com/celtic-knots.html (it’s the sailor’s knot)
The original source I tried was from wikimedia commons (https://commons.wikimedia.org/wiki/File:Celtic-knot-insquare-39crossings.svg) but that file had some weird pathing that didn’t work well on the glowforge. So, I converted it to a png and filled in the green with white.
I then uploaded the image to my glowforge and put my case inside. The initial job was set at 500 spd/10pwr, .38 focus height, and estimated at 52 minutes, which was too long for me to wait. So, I erased/cropped out some of the image to get this:
And changed settings to 600spd/30pwr. That estimated the time at 25 minutes, and I hit go.
When it was done, I had to wipe the soot out of the etched area (and it still smells like burning). Ultimately I’m very happy with the outcome.
One interesting thing I discovered: the image source I ended up using was black, white, and transparent, which the glowforge interpreted into two levels of etching - which is why you can see dots inside of the knotted area. I like that effect, it gives it a little more appeal, but if you want to try something similar I might suggest using a black & transparent png as your source.
Also, it might be interesting to use gif as the source format since you could control exactly the colors that are in the image.