Heck, I need to do this for one of my teenagers. I’ll provide a phone and service, you can have the smartphone when you buy it. LOL. I know, by some standards, I’m a terrible parent.
I am using Rhino 5 on windows, I had been using export .DXF as lines and arcs but it kept doing weird things like leaving out lines and changing the size of arcs so I exported as just lines and then imported to inkscape to save as a svg.
I don’t have a Glowforge yet, so I can’t try them. I have exported a few SVGs. One thing that seems screwy (to me) is that the resolution/DPI setting seems to effect the quality of the vector paths. I set it to 1000 and that has made the files look good in Illustrator.
If you tweak the settings the exported DXFs will open fine in Inkscape.
… spoke too soon. With more testing I see that even with tweaked settings the DXFs only open mostly fine in Inkscape. On the plus side they seem to be completely fine when opened in Rhino, Fusion 360, and SolidWorks.