--- Log opened Sun Oct 11 00:00:43 2020
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10:58 < archels> can I abuse a PCB solder stencil service to produce a custom optical encoder disc?
11:00 < fenn> i will allow it
11:00 < fenn> is there a permission slip i have to sign?
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11:01 < fenn> check out moire masks
11:02 < fenn> or, well, use your imagination
11:05 < fenn> print out this on transparency sheet and stack them on a pushpin http://fennetic.net/irc/encoder-vernier.pdf http://fennetic.net/irc/encoder-vernier.ps
11:06 < fenn> or a more traditional quadrature + index http://fennetic.net/irc/encoder.pdf
11:11 < archels> hmm, what's the highest resolution you worked those things at?
11:14 < archels> not sure what to look for in the IR LED/photodetector gate. hopefully at least it comes as a single moulded unit
11:15 < fenn> encoder.pdf was the most i could squeeze out of my laser printer
11:15 < fenn> you can probably go to 4x the resolution with a high quality laser printer
11:19 < archels> if that's 260 black bars on a disc, that means you can get a resolution of 2*260 or about 0.7 degrees out of it, right?
11:23 < lsneff> .yt https://www.youtube.com/watch?v=MBRqu0YOH14
11:27 < fenn> quadrature has 4 state transitions so the practical resolution is more like 0.34deg
11:27 < fenn> note that accuracy and resolution are not necessarily the same
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19:28 < lsneff> Well, I talked to someone who does dna nanotech research today and I think I'm going to shelve atomcad
19:28 < lsneff> It's really only possible for it to be software for pretty visualizations
19:31 < kanzure> lsneff: why was he able to convince you but we weren't
19:32 < kanzure> if you want projects let us know
19:37 < lsneff> I think for two reasons: 1. I'm a human and actually talking to someone face to face is more convincing for me and 2. someone who I know has a lot of publicized experience in thr field is more convincing as well
19:38 < lsneff> I think there's a path to me doing research in the DNA nanotech field with the person I talked, but I'm not sure yet.
20:13 < lsneff> I guess I gotta figure out what I'm going to do instead for my senior thesis.
21:15 < lsneff> Maybe I'll do something with 3d printers, dunno
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--- Log closed Mon Oct 12 00:00:44 2020