DocScrutinizer05 changed the topic of #qi-hardware to: Copyleft hardware - http://qi-hardware.com | hardware hackers join here to discuss Ben NanoNote, atben / atusb 802.15.4 wireless, and other community driven hw projects | public logging at http://en.qi-hardware.com/irclogs and http://irclog.whitequark.org/qi-hardware
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<whitequark> wpwrak: btw, remember my order of extra-thick acrylic? it arrived finally
<whitequark> although I suddenly realize I don't have anything to cut 1" acrylic horizontally with
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<whitequark> whoa
<whitequark> this book about PCBs I bought is very interesting. I see it has a chapter on Laser Direct Imaging
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<whitequark> wtf
<whitequark> so I'm trying to lubricate the linear bearings with this PTFE-based lubricant, nonviscous and inert
<whitequark> in principle, the best one for this task
<whitequark> and they start to work significantly *worse*
<whitequark> hm, odd
<whitequark> after assembling it back, it works pretty smooth
<DocScrutinizer05> odds are the bearings are already made of PTFE, then you just ruined them by basically dissolving the b earing with the lubricant
<whitequark> DocScrutinizer05: huh?
<whitequark> they are absolutely not, and if they were, that would not be the case
<whitequark> a PTFE lubricant is an emulsion of PTFE in some kind of oil
<DocScrutinizer05> while I dunno for sure if this is true for PTFE, it is definitely true for using mineral oil based lubricants on usual oil based plastics
<whitequark> it's not corrosive nor a solvent
<whitequark> yes. for mineral oil plastics, this is true.
<whitequark> but not for PTFE. I do have a lubricated PTFE part there, and it came from a factory lubricated with PTFE, and I used it for half a year
<whitequark> still it is pretty much intact
<whitequark> the bearings are LM22UU
<DocScrutinizer05> then nevermind what I said
<whitequark> steel balls inside some kind of regular shitty plastic case
<DocScrutinizer05> :nod:
* DocScrutinizer05 wonders if can copy the URL via VNC to local browser
<whitequark> don't bother
<whitequark> the page is very uninformative
<DocScrutinizer05> anyway IT WORKS \o/
<DocScrutinizer05> hal VNC
<DocScrutinizer05> hail
<DocScrutinizer05> that's really awesome and amazing
<whitequark> so, yeah, I first soaked them with dimethoxymethane aerosol to clean grit that was definitely inside
<whitequark> I know because when the liquid dried, there was shit all over my floor
<whitequark> it made them roll somewhat better
<DocScrutinizer05> almost lets me forget the tooth I just broke. 2nd in 3 weeks
<whitequark> then I put a LOT of liquid PTFE-based lubricant inside
<whitequark> when I tried to manually move the rod, it still didn't move smoothly at all
<whitequark> but when I actually assembled it all on the machine frame, it seems to run quite well
<whitequark> much better than before, at least
<whitequark> I don't know if it's shitty bearing design or merely shitty broken bearings that I now have
<DocScrutinizer05> weird
<whitequark> since the balls basically ground several depressions in the hardened chrome-plated rods
<whitequark> there could be literally anything wrong with the bearings
<whitequark> they aren't *supposed* to do that
<DocScrutinizer05> considered acrylic dust getting dissolved in your solvent?
<whitequark> hm?
<whitequark> no, the bearings are closed, and there was no workpiece material inside
<DocScrutinizer05> ok
<whitequark> also, dimethoxymethane is sold as PCB cleaner, specifically because it doesn't dissolve plastics
<whitequark> you don't want a connector to mangle while you clean it
<whitequark> however it is really good at removing various kinds of organic residue
* DocScrutinizer05 heads out again, too get some USB extension so can put the N900 on the balcony and *maybe* get more than 6KB/s from 3G
<whitequark> so that's what I thought, the pressurised stream of dimethoxymethane should dissolve any sticking stuff and get the grit out of bearings
<DocScrutinizer05> fsck dentists, they got no clue really
<DocScrutinizer05> I mean, when you mill out everything but a 0.5mm thick wall from a cylindricaloid object made of calcium and fill that cavity with epoxy, what do you expect the calcium wall being able to take on mechanical force before it breaks
<whitequark> hmmm
<whitequark> should've got an implant, no?
<DocScrutinizer05> sort of
<DocScrutinizer05> 3 weeks ago right lower 7 broke, now left lower 7 same
<whitequark> that sucks :/
<DocScrutinizer05> indeed
<DocScrutinizer05> particularly since detinst "fixed" both less than a year ago, and already fixed the very same problem on left lower a 2 weeks after original work. And that shit cost me 1500
<whitequark> wow
<DocScrutinizer05> that dentist is not worth her money
<DocScrutinizer05> I wonder if there shouldn't be warranty on craftmanship for dentist work as well
<whitequark> I think there is?
<DocScrutinizer05> on the bright side: it could be worse. both teeth are dead - complete radix nerve removal - iirc
<DocScrutinizer05> so at least no pain, except from sharp edges cutting my tongue
<DocScrutinizer05> in holiday
<DocScrutinizer05> probably you and me both would be the better dentists than this lady. We understand our materials and glue and stuff, right? ;-D
<wpwrak> you may want to go to a local dentist to get a temporary filling. that'll be good for some weeks.
<wpwrak> that way you won't cut yourself on sharp edges
<DocScrutinizer05> it's only 10% of the active surface that's missing now, and I'm afraid some more provisional messing with this tooth will ruin the radix treatment which so far acts fine
<whitequark> oooh yes, sharp edges cutting the tongue. I understand you so well
* DocScrutinizer05 gets a decent glass of Terry Centenario to forget that shit
<larsc> whitequark: always swallow your razors whole
<wpwrak> also, do not run your chainsaws at excessive speed while juggling them
<DocScrutinizer05> I guess what broke away isn't tooth calcium but already some epoxy or acrylate she used last time she tried to fix exactly same issue: http://maemo.cloud-7.de/share-service/20140808_012.jpg
<DocScrutinizer05> so trying to get this simply replaced by another blob of acrylic putty might not be the worst idea indeed
<whitequark> huh
<whitequark> I would use single-component epoxy though, it seems sturdier to me
<DocScrutinizer51> I dunno what they use in dentistery nowadays
<whitequark> could ask pubmed?
<DocScrutinizer51> prolly mostly cyanoacrylate with UV curing
<DocScrutinizer51> some harvard shit
<DocScrutinizer51> some of the stuff is mildly biozid so can't get used every case
<whitequark> mmm, cyanoacrylate
<whitequark> UV curing? I thought cyanoacrylate curing is catalyzed by water vapour
<wpwrak> prolly some plastic-ceramic mix. and yes, everything with uv curing.
<wpwrak> that is, unless it's somewhere inaccessible. then they switch to some concrete
<whitequark> interesting
<wpwrak> yes ! ubuntu updates chromium to a version without the http://-stripping bug. FINALLY !
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<eintopf> :/
* eintopf reminds me of the firefox stealing focus bug
<eintopf> about years, firefox switching virtual desktop if you opened a url
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<fmeerkoetter> I didn't fully grok http://en.qi-hardware.com/wiki/Ben_WPAN - is it currently possible to buy ATUSB devices?
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<wpwrak> how to get rid of telemarketers: https://plus.google.com/+ChrisBlasko/posts/GzCuzTyUXNq
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