4 ms·
Neat. Perhaps one can use it to see PLA creep in real time. (not a joke, I'd actually like to see that)
by alnwlsn 10mo ago
Neat. Perhaps one can use it to see PLA creep in real time.
(not a joke, I'd actually like to see that)
- zokier 10mo agoNot creep, but thermal expansion is definitely noticeable with interferometry: https://www.youtube.com/watch?v=vupIq4epCQA https://www.youtube.com/watch?v=vupIq4epCQA
- LolWolf 10mo agoyeah, even breathing nearby this thing (or putting a soldering iron near the paths) will show a visible change!
- LolWolf 10mo agoOh absolutely! I would not actually use this for uhhh, repeatable measurements over any extended period of time! (If that were the case, I'd recommend re-printing it in a slightly more stable material, or just CNC milling the mounts out of aluminum using some of the ~$1-2K aluminum desktop mills and using some aluminum extrusions as the base.)
- bigiain 10mo agoI suspect they'd be fairly cheap to get made at somewhere like JLCCNC. Or maybe get them to 3D print them in metal for you? I wonder if they have enough different metal choices that you could build a thermal expansion compensated version? https://patents.google.com/patent/US8292537B2/en https://patents.google.com/patent/US8292537B2/en
- LolWolf 10mo agoi’d probably just get it milled only if you had the CNC handy, the complexity isn’t enough to justify 3d printing it in metal (probably a decent bit more expensive too!) but at “get it done in JLCCNC” prices I think a thorlabs mount is probably in your future :)
- bigiain 10mo agoI'd be surprised? If you have spare time, I'd be fascinated to see what their website magic quote tool tells you if you just upload your 3d files. Based on other projects I've seen using them I'd guess under $100...
- LolWolf 10mo agosure ! I’ll give it a try a little later once I’m at a computer ! (you can too, if you’d like, the CAD files are all online as .step files :)