| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Ugh, i must've made some mistakes in unit conversions, and it came out quite wrong. Here's a new version, more carefully measured: spec-housing-2..." | Read more » | about 8 years ago | |||
| stoft | "Looks like a good starting point. For the moment, I'd first suggest incorporating some form of sub-topic list for the 'Body/Content' section which ..." | Read more » | about 8 years ago | |||
| warren | "Ponoko requested that I don't let cut lines overlap, so I adjusted the cut file: spec-housing-2.1-24x12.pdf spec-housing-2.1-24x12.svg " | Read more » | over 8 years ago | |||
| warren | "I like the screw-in-the-base option, but I also wonder if good coverage of strong double-sided tape is a choice we can offer too. Good thoughts; I'..." | Read more » | over 8 years ago | |||
| stoft | "Just checking .... what is the mechanical relationship between the dimensions of the paper module and the inside dimensions of the laser-cut cover?..." | Read more » | over 8 years ago | |||
| warren | "It's going to be $16.20, which is expensive for a cut but cheap for a prototype :-) Transparent acrylic (although I could use matte black at 22.70..." | Read more » | over 8 years ago | |||
| warren | "I'm going to try getting it lasercut at http://www.ponoko.com/ -- in part to test if Ponoko is a service others could use for prototyping lasercut ..." | Read more » | over 8 years ago | |||
| warren | "I like the idea of side holes for different types of spectrometry! The flap is to hold something like a leaf against the window so it's flat, and ..." | Read more » | over 8 years ago | |||
| warren | "Thanks, Guillaume851 - I've seen yours and it does look very rigid, thank you! Part of the design I'm prototyping in my note here is a design we co..." | Read more » | over 8 years ago | |||
| Guillaume851 | "Warren, I know that the spectrometer that I have built is extremely rigid, but it is not made of cardboard, It is made from square black plastic r..." | Read more » | over 8 years ago | |||
| stoft | "I'm not following the flap bit. Why does the spectrometer need to be blocked? Also, from some simple experiements, I found that I needed much much ..." | Read more » | over 8 years ago | |||
| warren | "I'm also interested in how this rigid frame allowed for additional scanning or sampling apparatus, for example for reflectance measurements off of ..." | Read more » | over 8 years ago | |||
| warren | "Good idea -- here's an updated version with small screw or bolt holes: spectrometer-housing-2.svg spectrometer-housing-2.pdf " | Read more » | over 8 years ago | |||
| stoft | "Clever; only 2 part types. Since the internal components are still merely "trapped" by the paper housing, you might consider adding a couple holes ..." | Read more » | over 8 years ago | |||
| stoft | "Jeff, I have a local supplier call Tap Plastics but I assume laser-cut plastics are now available in most metropolitan areas. Ok, that's fine to k..." | Read more » | over 8 years ago | |||
| warren | "Also see some of the suggestions here, which experiment with interior rigidity as well: https://publiclab.org/notes/ygzstc/08-19-2015/some-suggesti..." | Read more » | over 8 years ago | |||
| stoft | "@viechdokter, yes, it was just an experimental baffle for stray light. Keeping reflections low inside the space between slit and grating is necessa..." | Read more » | over 8 years ago | |||
| viechdokter | "The little thing with the hole in front of your DVD - is this for preventing stray light coming in? " | Read more » | over 8 years ago | |||
| warren | "I frequently have laser-cut acrylics made, in lots of several hundred, and the simplest ones are still about $3.50 each -- the process is not cheap..." | Read more » | over 8 years ago | |||
| stoft | "You mean something like this? (from https://publiclab.org/notes/stoft/03-02-2015/plab-3-spectrometer-upgrade-prototype): Yes, mine could be simp..." | Read more » | over 8 years ago | |||
| viechdokter | "So... how about turning the (DVD holding) paper thing around and create a paper housing all around the wooden block with a parallel surface, a rect..." | Read more » | over 8 years ago | |||
| stoft | "I believe the configuration with 45 and 20 deg was extracted from physically experimenting on the first PLab design. ( I think they were having dif..." | Read more » | over 8 years ago | |||
| viechdokter | "PS: I guess if you use acrylic you need a real dull black finish to prevent stray light. PPS: when I thought about a new setup I also came to a "C..." | Read more » | over 8 years ago | |||
| viechdokter | "Hi Chris, do you mean "sit flush" as in "parallel", "pressing tightly against it"? I thought you had a good reason for the 20° angle between DVD a..." | Read more » | over 8 years ago |