I had new progressive lenses made, but the old ones are still fine and don’t have a scratch. They’re just a bit weak at near distance, but otherwise perfectly serviceable.
So I made new frames for them because I don’t like to throw away things that work.
All assembled, the frames weigh 3.5 grams, and 14 grams with the lenses mounted.
This was printed with a Prusa Mk4 and regular PLA at 0.15 mm layer height. The hinges use simple 10x1 pins - and I worked my magic to print the holes horizontally to the final dimension with interference fit, so no reaming or drilling is necessary. These glasses are straight out of the printer with zero rework.
I think they look pretty good as they are. If anybody notices they’re 3D-printed, I’ll say I’m gunning for that particular style 🙂
The front of the frames prints in 11 minutes and both temples in 12 minutes. I could break and make a new pair every day for the rest of my life and it would still be faster and cheaper than going to Specsavers only once.
These are cool.
I wonder how these would do if you printed in ABS and then used acetone in a makeshift vapor chamber to smooth and somewhat anneal them?
I think, with them being smoother, they’d be somewhat more comfortable
Although PETG would probably last longer overall since it has some flex/give to it but not sure if there’s any process that lets you “smooth” it like you can with ABS.
When you smooth you do give up some dimensional accuracy.
These days, I more or less exclusively print ASA and PETG. I would call the ASA tougher than PETG, but PETG's ability to stick to itself when printing makes me prefer it for thin parts. In my experience, PETG also allows for more elastic (temporary/recoverable) deformation before the part undergoes plastic (permanent) deformation.
What about PCTG? Pretty much for anything that I’d need more strength than regular PETG I could go with PETG-CF or PCTG. The only thing that can force me to use ABS/ASA is the need for (more) temperature resistance.
I've never heard of PCTG before. A quick Google search and I'll probably be ordering a spool.