#emc | Logs for 2005-04-18

[00:21:38] <deedra> {global notice} Hi all! I really really apologize for that. that is completely my fault. I was fixing the firewall on one of our hubs and messed things up. things are back to normal now. Again I'm really sorry. thank you for your patience, and thank you for using freenode!
[00:22:43] <jmkasunich> obviously not a MS employee ;-)
[00:24:44] <fenn> jmkasunich are you really there or is that a script replying to a script?
[00:24:58] <jmkasunich> I'm here
[00:25:15] <fenn> hey i found a van norman 12 in the scrapyard for $200
[00:25:20] <jmkasunich> cool
[00:25:27] <jmkasunich> in decent shape?
[00:25:48] <fenn> X feedscrew is bent at handle and knee handle is broken off
[00:25:57] <fenn> lying on its side in the dirt
[00:26:04] <fenn> i think it's a deal :)
[00:26:38] <Phydbleep> fenn: Baltimore?
[00:26:39] <fenn> gotta get it home though.. been a week and my friend with the trailer still hasn't called back (sigh)
[00:26:46] <fenn> bloomington IN
[00:26:59] <Phydbleep> Ah, I guessed wrong. :)
[00:27:09] <jmkasunich> how bad is the leadscrew bent?
[00:27:15] <jmkasunich> and which end, right or left?
[00:27:24] <fenn> 5-10 degrees, left end i think
[00:27:33] <jmkasunich> bummer
[00:27:46] <jmkasunich> the right end isn't very important
[00:27:47] <fenn> will fix it, no prob :{
[00:27:49] <fenn> erf
[00:28:05] <jmkasunich> the bearings that take the axial load are on the left (a pair of angular contact ones)
[00:28:13] <Phydbleep> Bent at the handle.. Check for cracks, massage with mallet, repeat as needed. :)
[00:28:24] <fenn> its not the leadscrew thats bent its the part that sticks out to mount the handle on
[00:28:34] <Phydbleep> Then replace the bearings.
[00:28:37] <fenn> same part, different part of part
[00:28:40] <fenn> ugh
[00:28:53] <jmkasunich> right, the bearings might have gotten tweaked
[00:29:02] <jmkasunich> I replaced mine, $36 for both
[00:29:06] <fenn> does it use bronze bushings?
[00:29:26] <Phydbleep> Massage with mallet method will tweak them again. :)
[00:29:28] <fenn> i've seen bronze angular contact bushings before wasn't sure what you meant
[00:29:31] <jmkasunich> (some yahoo had put them both in facing the same way, then took a heavy cut and they popped apart
[00:29:43] <jmkasunich> angular contact ball bearings
[00:30:04] <jmkasunich> designed to support radial loads, and heavy axial load in one direction
[00:30:09] <Phydbleep> Tapered roller variant with balls?
[00:30:18] <jmkasunich> used in pairs facing opposite dirctions to take load both ways
[00:30:22] <jmkasunich> kinda
[00:30:37] <jmkasunich> more like regular ball bearings with one side of the race higher than the other
[00:31:14] <jmkasunich> they will hold themselves together (unlike tapered rollers) but can handle limited thrust one way, lots the other way
[00:31:32] <fenn> damn I had lots of questions but cant think of any now
[00:31:47] <Phydbleep> I usually replace those with a sealed bearing and a thrust bearing.
[00:32:32] <jmkasunich> the van norman was a well designed machine, and the proper bearings are still available, I wouldn't fsck around with it. just use the proper replacements
[00:32:53] <jmkasunich> fenn: do you know about the yahoo van norman group?
[00:33:21] <Phydbleep> if you can get them, go for it. Otherwise it's junk without surgery.
[00:33:59] <jmkasunich> I had no problem getting them for my 1941 Van Norman, only a couple years ago
[00:35:57] <fenn> I'm thinking of replacing the motor with a single-phase or DC motor, is that a huge project or relatively straightforward?
[00:36:20] <jmkasunich> not to bad, the motor just sits up there with drive belts
[00:36:41] <jmkasunich> I'm using my original motor tho, with a small VFD
[00:37:02] <jmkasunich> it is a 1200RPM motor tho (nominal, actual 1175 or something)
[00:37:19] <jmkasunich> as opposed to the usuall 1780 or so
[00:37:22] <Phydbleep> I just got rid of the 1-1/2 HP 220V reversible motor on my lathe and i'm replacing it with a 1 HP PMDC with a PWM drive.
[00:38:34] <Phydbleep> fenn: How big is the motor?
[00:38:41] <fenn> are permanent magnet motors better or worse than all-coil motors?
[00:38:48] <jmkasunich> different
[00:38:50] <fenn> dunno about the motor, haven't started looking yet
[00:38:55] <Phydbleep> 1/2 the power draw.
[00:39:05] <jmkasunich> the existing motor is probably 1-1/2 HP
[00:39:25] <fenn> lighter weight for coil motors?
[00:40:25] <Phydbleep> With a field motor @ 36V 2000Watts is approx 1 HP, Replace the field coils with magnets and it goes to 2HP
[00:41:08] <fenn> I always wondered what "field coils" meant
[00:41:34] <Phydbleep> fenn: Not really lighter.. The magnets are about the same weight as the steel cores the coils are wound on.
[00:42:18] <Phydbleep> Actually the PMDC are lighter per HP.
[00:44:23] <Phydbleep> PM motors won't decouple and coast though, The magnets create drag because they're always on.
[00:44:57] <fenn> shrug.. how much eddy current do you get in a copper wire anyway
[00:45:18] <Phydbleep> Lots in the steel core it's wound on.
[00:45:23] <fenn> usually I'd want the motor to stop sooner than later
[00:46:08] <fenn> what's an application you'd want the motor to coast after it's turned off?
[00:46:19] <Phydbleep> I'm adding a resistive braking circuit to mine just because of the amount of mass in motion on this old beast.
[00:47:36] <Phydbleep> fenn: Some axial fans, gyro units, any number of things.
[00:47:48] <fenn> yeah then you get a neato "spindle is on" lighted sign with the lightbulb for the resistor
[00:48:12] <Phydbleep> I had not thought of that...
[00:48:41] <fenn> cheaper to buy a 100W lightbulb than a 100W resistor
[00:48:51] <Phydbleep> I was going to have a "Do not stick remaining fingers into spindle" sign.
[00:49:03] <fenn> snicker
[00:50:19] <Phydbleep> Hehehe.. a friend of mine has a sign "WARNING CLASS III LASER DEVICE! Do not look into beam with remaining eye!"
[00:51:40] <Phydbleep> There has not been an laser/eye accident in that lab since. (The wasn't a first time, He just liked the sign.)
[00:52:51] <fenn> i'm going to put the following text on my hexapod if it ever gets done
[00:53:19] <fenn> ACHTUNG!
[00:53:19] <fenn> --------
[00:53:19] <fenn> Das machine is nicht fur gerfingerpoken und mittengrabben.
[00:53:19] <fenn> Ist easy schnappen der Sprinngwerk, blowenfusen und
[00:53:19] <fenn> poppencorken mit spitzensparken.
[00:53:21] <fenn> Ist nicht fur gewerken by das Dummkopfen. Das rubbernecken
[00:53:23] <fenn> sightseeren keepen hands in das Pockets.
[00:53:25] <fenn> Relaxen und watch das blinkenlights...
[00:58:59] <Phydbleep> * Phydbleep wants a hexapod big enough to put a little roof on so he can tell the neighbors it's a garden gazebo.
[00:59:55] <Phydbleep> I'll just have billet aluminum over for tea. :)
[01:02:22] <fenn> was thinking about using my geodesic dome as a space frame for the hexapod
[01:02:50] <fenn> need to make it a geodesic sphere to be worth doing
[01:03:39] <fenn> heh robotic greenhouse tender
[01:14:34] <fenn> man am I stupid or is there no way to do batch maniuplation in GIMP?
[01:16:24] <fenn> n/m you do it on the command line
[01:21:44] <Phydbleep> fenn: You forgot to RTFM?
[01:22:02] <fenn> ]$ man gimp
[01:22:02] <fenn> No manual entry for gimp
[01:22:06] <fenn> :P
[01:22:25] <fenn> help browser crashed when I opened it
[01:22:28] <fenn> I hate help browsers
[01:22:47] <Phydbleep> gimp docs are html.. /usr/shre/doc/gimp-? I think.
[01:23:07] <fenn> yeah but typing man is so much easier, why don't people include man pages anymore?
[01:23:15] <Phydbleep> /usr/share/docs/gimp-?
[01:23:51] <Phydbleep> Because 99% of them now tell you to RTFM @ such&such location.
[01:24:00] <fenn> lazy bastards
[01:24:16] <Phydbleep> Was that the answer you wanted?
[01:25:06] <Phydbleep> It's too much data for a man page.. try 'gimp --help'
[01:25:46] <fenn> no i wanted the answer that said "type gimp -b ~/gimp/scripts/scale_image" but there appears to be no scale image script
[01:26:14] <fenn> a man page should have all the entries on the gimp --help page with a little bit more explanation for each entry
[01:26:29] <fenn> and maybe a list of commands
[01:26:39] <Phydbleep> gimp --help runs to 50-60 pages.
[01:26:56] <fenn> eh?
[01:27:15] <fenn> its one console page on mine
[01:28:20] <Phydbleep> There's another one for gimp that dumps a bunch of data to the console.
[01:29:52] <fenn> blarg i hate learning new programming languages
[01:31:53] <Phydbleep> You think that's bad.. I ended up learning quaternion math for one without realising i was doing it... :)
[01:32:51] <fenn> hmm quaternion is like a n-dimensional matrix? or is that a tensor
[01:34:10] <Phydbleep> X/Y/Z/Blue?
[01:34:26] <Phydbleep> X/Y/Z/Scalar actually.
[01:35:46] <fenn> so 4 element vector math
[01:36:10] <fenn> sounds like computer graphics to me
[01:36:31] <Phydbleep> Don't ask me.. i never bother to take calculus..
[01:36:50] <Phydbleep> Yeah, It's VR stuff.
[01:38:11] <fenn> calculus is easy.. math is just taught badly in schools
[01:38:28] <Phydbleep> Don't I know it..
[01:39:07] <fenn> I guess anything is easy once you get the hang of it
[01:39:46] <Phydbleep> * Phydbleep is one of those people that can 'see/feel' the solution to complex field interactions.
[01:40:10] <fenn> it's the way your brain was designed that allows you to do that
[01:40:19] <fenn> human nature :)
[01:41:00] <fenn> what specifically are you talking about?
[01:41:41] <Phydbleep> I've got a friend in the math dept at UNM who had to take 4 years of math to be able to put what i visualise into equations where the rest of the dept can scratch their heads.. :)
[01:44:26] <fenn> sometimes it takes even longer than that for them to catch up.. yogis have been visualizing the inner structure of atomic nuclei since 1000's of years ago, physics still hasn't caught up
[01:45:29] <fenn> still nobody understands most of tesla's inventions
[01:46:34] <Phydbleep> I just think it's really hilarious that my name is going to end up on research papers for nano-scale integration and fluid dynamics and I've never actually set foot in the dept.. :)
[01:47:31] <fenn> thus begins your illustrious career in science
[01:47:51] <fenn> just wondering what does Phydbleep mean?
[01:48:24] <fenn> looks like phylogeny database leep to me
[01:48:43] <Phydbleep> Phydeaux@Bleep
[01:49:11] <fenn> heh
[01:51:06] <Phydbleep> Hmm.. Time to de-rust some steel and assemble a safety cage for the drivetrain on the lathe.
[01:51:15] <Phydbleep> bbiab.
[07:33:40] <alex_joni> hello an0n
[07:33:49] <alex_joni> figured that spamassassin stuff out?
[07:33:55] <alex_joni> * alex_joni wants to do the same thing
[07:34:45] <anonimasu> yeah kind of..
[07:34:52] <anonimasu> although I havent written the scripts to do it yet
[07:34:58] <alex_joni> heh..need scripts?
[07:35:01] <anonimasu> yeah
[07:35:05] <alex_joni> what for?
[07:35:06] <anonimasu> you need to fortward the orginal message as a attachment..
[07:35:10] <alex_joni> right
[07:35:17] <alex_joni> that's easy
[07:35:24] <anonimasu> otherwise it'll take your "FW:" into account and classify your messages as attachments..
[07:35:28] <anonimasu> err
[07:35:30] <anonimasu> as spam
[07:36:05] <anonimasu> for splitting the attachment out of the forwarded message to feed back into spamassassin
[07:36:06] <anonimasu> :)
[07:36:39] <alex_joni> I see :(
[07:37:27] <anonimasu> if you arent in a great hurry I'll make one but it'll take some time
[07:37:43] <alex_joni> hmm.. but if it's bayesian learning
[07:37:52] <alex_joni> it should learn keywords.. not addresses
[07:37:53] <alex_joni> right?
[07:38:14] <anonimasu> hm, fuzzy filtering..
[07:38:27] <anonimasu> like FW in subjects gets accounted for..
[07:38:58] <anonimasu> I think it learn addresses aswell
[07:41:07] <anonimasu> http://email.about.com/cs/bayesianfilters/a/bayesian_filter.htm
[07:42:07] <anonimasu> :)
[07:42:24] <alex_joni> The characteristics a Bayesian spam filter can look at can be
[07:42:24] <alex_joni> * the words in the body of the message, of course, and
[07:42:24] <alex_joni> * its headers (senders and message paths, for example!), but also
[07:42:24] <alex_joni> * other aspects such as HTML code (like colors), or even
[07:42:24] <alex_joni> * word pairs, phrases and
[07:42:25] <alex_joni> * meta information (where a particular phrase appears, for example
[07:43:14] <anonimasu> yep everything almost
[07:44:35] <anonimasu> brb lunch
[07:46:14] <alex_joni> bye
[08:47:43] <anonimasu> iab
[08:51:08] <alex_joni> wb
[08:51:18] <anonimasu> thanks
[10:46:52] <Phydbleep> les: You awake yet?
[10:47:23] <alex_joni> morning fido
[10:47:24] <alex_joni> ;)
[10:47:32] <Phydbleep> alex_joni: :)
[10:47:42] <Phydbleep> * Phydbleep is very happy.
[10:47:46] <alex_joni> why is that?
[10:51:07] <Phydbleep> 5 channel, 100V 10A servo/stepper drive with 4096 ppr encoders for <$100 in parts. :)
[10:51:41] <alex_joni> cool.. any built yet?
[10:52:55] <Phydbleep> The most expensive thing is the 20 IRF-520's for the 5 h-bridges, I'm going to add all the pads for 10 as 5 pairs to drive steppers.
[10:55:08] <Phydbleep> Hehehe.. Pads for 40 to-220 devices on 5 boards with 8 each to make troubleshooting/repair easy.
[10:56:51] <Phydbleep> 200V/20A per channel adds $20 per channel to the parts.
[11:00:27] <Phydbleep> alex_joni: Working on the circuit layout and waiting till later today so I can get to a hi0res printer.
[11:04:36] <jepler_> Phydbleep: are you going to put the design online somewhere?
[11:11:05] <alex_joni> hey Jeff... long time no see ;)
[11:11:15] <jepler_> alex_joni: I've been here the whole time.
[11:11:23] <jepler_> alex_joni: but yeah, I haven't been paying attention much
[11:11:39] <jepler_> alex_joni: what's new?
[11:11:40] <alex_joni> yeah.. it was pretty quiet lately
[11:11:46] <alex_joni> jepler_: not much
[11:11:55] <alex_joni> lots of work, no urge to do it ;)
[11:12:29] <jepler_> I know the feeling
[11:12:51] <alex_joni> yeah... I just noticed you like to photograph stuff
[11:13:06] <jepler_> I have an amazing number of mediocre photos online, it's true.
[11:13:09] <alex_joni> don't wanna say "take pictures" .. as that would be insulting ;)
[11:13:15] <alex_joni> pretty nice ones too
[11:13:31] <alex_joni> that's one thing I would love to have more time for
[11:13:36] <alex_joni> and gears too ;)
[11:14:02] <alex_joni> what cameras do you have?
[11:14:32] <jepler_> My current camera is a Digital Rebel. Before that I owned Nikon 5700, Olympus 2100, and an entry-level 1-megapixel Olympus.
[11:14:51] <alex_joni> I have an older photosmart 850
[11:14:55] <alex_joni> and some SLR's
[11:15:22] <alex_joni> the one I like best is an old Review Flex (1:1,4 50mm)
[11:15:39] <jepler_> I've never used a film slr
[11:15:44] <jepler_> oops, my ride is here. time to go to work.
[11:15:47] <alex_joni> bye
[11:38:35] <A-L-P-H-A> morning.
[11:41:26] <alex_joni> hey alpha
[11:41:44] <A-L-P-H-A> hey aj
[11:41:59] <alex_joni> what's up?
[11:42:18] <A-L-P-H-A> thinking...
[11:42:20] <A-L-P-H-A> that's all.
[11:42:35] <alex_joni> * alex_joni is thinking on buying a D2X
[11:42:36] <alex_joni> ;)
[11:42:41] <A-L-P-H-A> gonna try and make that spindle I've been thinking of for a while.
[11:43:00] <alex_joni> yeah?
[11:43:01] <A-L-P-H-A> I'm thinking of bouying a ER-16 collet extension, and turning it into a high speed spindle.
[11:43:23] <A-L-P-H-A> jmk, and les, were telling me over the weekend on how to do it.
[11:43:30] <alex_joni> nice
[11:43:38] <alex_joni> have you seen a D2x ?
[11:43:44] <A-L-P-H-A> no. what's that?
[11:43:45] <alex_joni> Nikon D2x
[11:43:50] <alex_joni> http://www.nikonusa.com/template.php?cat=1&grp=2&productNr=25215
[11:43:58] <A-L-P-H-A> camera?
[11:44:06] <alex_joni> yeah.. but what a camera ;)
[11:44:24] <A-L-P-H-A> There's gonna be a D70s soon.
[11:44:27] <alex_joni> 2.4 lbs
[11:44:46] <A-L-P-H-A> I don't take pictures that often.
[11:44:52] <alex_joni> heh
[11:44:54] <alex_joni> me neither
[11:45:04] <alex_joni> but it's one of the Rolls between the cameras
[12:22:16] <alex_joni> g'morning paul_c
[12:24:02] <paul_c> afternoon alex_joni
[12:35:56] <jepler_> D2x would be a bit too much camera for me, I'm afraid.
[12:36:09] <alex_joni> jepler_: ditto
[12:36:14] <alex_joni> but it's nice :D
[12:37:43] <jepler_> anyway, I'd have to buy the Canon EOS 1Ds Mark II instead (http://consumer.usa.canon.com/ir/controller?act=ModelDetailAct&fcategoryid=139&modelid=10598) since I have canon lenses
[12:38:01] <jepler_> full frame, mmm
[12:39:32] <alex_joni> 1Ds is pretty great too
[12:40:21] <jepler_> yeah, but it's my entire hobby budget for 2 years
[12:42:08] <jepler_> "We’ve all heard the expression, “Make every pixel count.” If you want to have more pixels to count, the Canon EOS-1Ds is ideal." -- ebay auction text
[13:16:53] <A-L-P-H-A> before I go out and buy a 1/8" ream and 1/8" dowel pin... anything I should know?
[13:33:23] <les> hmm
[13:34:25] <les> dowel pins are larger than the reamed hole
[13:35:28] <les> but a bit of sandpaper on a chucked up pin will fix that
[13:36:37] <les> let me check...have the msc catalog open anyway ordering stuff
[13:38:00] <A-L-P-H-A> thanks les
[13:38:26] <les> yeah...
[13:38:35] <A-L-P-H-A> yeah?
[13:38:45] <A-L-P-H-A> I can buy a ream for .1255"
[13:38:45] <les> reamers are +.0002 -0
[13:39:10] <les> pins are +.0002
[13:39:27] <les> .1255 would be too much slop I think
[13:39:29] <A-L-P-H-A> a ream for .120" is $5.00USD. a ream for .1255" is $25USD
[13:39:38] <les> heh
[13:39:58] <les> I would just get the .1250
[13:39:58] <A-L-P-H-A> oops
[13:40:02] <A-L-P-H-A> a ream for .1250" is $5.00USD. a ream for .1255" is $25USD
[13:40:39] <A-L-P-H-A> I'm just wondering now, because of the temp differences.
[13:40:41] <les> what material are you cutting?
[13:40:49] <A-L-P-H-A> mild cold rolled steel.
[13:40:55] <les> ok
[13:41:20] <A-L-P-H-A> I could get a 3' of 3/4" O1 drill rod.
[13:41:24] <A-L-P-H-A> but that's expensive.
[13:41:54] <les> I was just wondering if you needed carbide for the reamer
[13:42:04] <les> they are awfully fragile
[13:42:33] <les> and did you say that you did not have a good micrometer?
[13:42:46] <A-L-P-H-A> no good micrometer. :/
[13:42:53] <A-L-P-H-A> that's something I should _really_ buy.
[13:42:59] <A-L-P-H-A> I have access to one.
[13:43:12] <les> ok you ought to pick up one of those $10 swiss style ones then
[13:43:23] <les> or borrow...
[13:43:26] <A-L-P-H-A> $12.34CDN+15% tax
[13:43:40] <A-L-P-H-A> neightbour has one I can borrow.
[13:45:52] <les> k
[13:45:59] <alex_joni> * alex_joni goes home
[13:46:01] <alex_joni> bye guys
[13:46:31] <les> well just be prepared to sand down the dowel .0001 or .0002...no problem though...easy
[13:46:36] <les> bye alex
[13:47:47] <les> if the dowel happens to slide in the hole first time...that means the hole is bad (tapered)
[13:48:08] <A-L-P-H-A> I see.
[13:48:09] <les> do some practice ones
[13:48:17] <A-L-P-H-A> 'ight.
[13:49:17] <A-L-P-H-A> can I use HSS? or Carbide?
[13:49:23] <A-L-P-H-A> or shoudl I use carbide?
[13:49:29] <les> HSS will be fine
[13:51:06] <A-L-P-H-A> http://www.usshoptools.com/current_year/products_sitemap/Files%20For%20Al%20APR%2020/PDFS_CURRENT_YEAR_422_474/Pages_454_459.pdf I wouldn't mind one of these... BS-599-125
[13:52:41] <les> yeah 1 micron display
[13:53:04] <les> have to really watch the temp to measure in that range
[13:53:37] <A-L-P-H-A> I already have ot watch the temp for 0.0001"
[13:54:54] <A-L-P-H-A> les, oh, spiral flute? or straight? [straight should be good enough right?]
[13:55:42] <les> straight is fine
[13:56:37] <A-L-P-H-A> 'ight, time to go figure buy some toys, soon. and get business cards printed.
[13:56:46] <les> with either one it is common for the first 1/8 or more to be bell-mouthed
[13:57:10] <les> if you can leave extra on aand cut it off later it helps
[13:57:27] <les> ok have fun
[13:58:35] <A-L-P-H-A> oh. so go deeper.
[13:58:40] <A-L-P-H-A> and just part the tip off.
[14:03:09] <A-L-P-H-A> pilot dimple, drill #31 (.1200"), oil^2 + ream
[16:26:30] <an0n> an0n is now known as anonimasu
[16:26:33] <anonimasu> hello
[16:26:50] <Imperator_> hi
[16:31:15] <anonimasu> what's up?=
[17:09:45] <alex_joni> g'evening
[17:10:07] <anonimasu> evening alex
[17:10:11] <anonimasu> what's up?
[17:10:13] <alex_joni> hey anders
[17:10:19] <alex_joni> nuttin.. chillin'
[17:10:22] <alex_joni> relaxing
[17:10:26] <alex_joni> *G*
[17:10:36] <anonimasu> nice
[17:10:38] <anonimasu> :)
[17:10:39] <alex_joni> just finished my massage
[17:10:46] <alex_joni> yeah
[17:11:14] <anonimasu> I had one last thursday
[17:11:18] <anonimasu> err friday
[17:11:48] <alex_joni> mmmm.. nice :D
[17:14:17] <anonimasu> yeah
[17:14:18] <anonimasu> :)
[17:14:35] <anonimasu> I am looking for some info about some electronics how to easily change a 0-5v signal to 5-0V
[17:14:48] <alex_joni> how about an inverter?
[17:14:54] <alex_joni> is it analog?
[17:14:57] <anonimasu> yes
[17:15:03] <alex_joni> opamp
[17:15:11] <anonimasu> I have no idea how to do anything like that
[17:15:19] <anonimasu> since I dont know anything about OPAMPS
[17:15:29] <anonimasu> :/
[17:16:19] <alex_joni> http://sound.westhost.com/project107.htm
[17:16:47] <alex_joni> look at the first picture
[17:17:03] <alex_joni> take only half of it (the upper half U1A)
[17:17:07] <alex_joni> and you're set
[17:17:35] <anonimasu> hm, ok
[17:17:36] <alex_joni> only thing is you need +/-15V
[17:17:36] <anonimasu> :)
[17:17:44] <anonimasu> oh, that's not possible
[17:17:47] <alex_joni> or +/-5V in your case
[17:17:50] <anonimasu> yeah
[17:18:10] <anonimasu> well, if that's the case, I'll order a opamp tomorrow togther with a book.
[17:18:14] <anonimasu> on how to use opamps. ;)
[17:18:26] <anonimasu> I hate not knowing enough about electronics
[17:18:31] <alex_joni> but this will produce 0/5V -> -(0/5)V
[17:18:43] <alex_joni> so 5V become -5V
[17:18:52] <anonimasu> hm, that's not right :/
[17:19:41] <alex_joni> what do you command with it?
[17:19:47] <anonimasu> it's for the car ;)
[17:20:02] <alex_joni> take the -5V and use it as Gnd (or tie it to Gnd)
[17:20:06] <anonimasu> I have a sensor that gives a 5-0v reading that I am going to replace..
[17:20:10] <alex_joni> then it's 0-5
[17:20:33] <anonimasu> it's a IC pressure sensor that's going there instead,
[17:20:42] <alex_joni> but you need separation between the first Gnd, and the second (which is infact -5v)
[17:20:44] <anonimasu> so switching gnd would fry it..
[17:21:27] <anonimasu> when the sensor is un-excited you have 5V out of it
[17:24:39] <anonimasu> :/
[17:30:14] <alex_joni> an0n: I think you should be ok with 2 opamps
[17:30:33] <alex_joni> the first set up as an inverter (producing -5/0V)
[17:30:49] <alex_joni> the second as an adder (adding 5V to the signal)
[17:31:11] <anonimasu> hm, ok
[17:31:21] <alex_joni> http://fourier.eng.hmc.edu/e84/lectures/ch5/node1.html
[17:31:27] <alex_joni> should give you some basics
[17:31:38] <anonimasu> ah thanks!
[17:32:29] <alex_joni> http://www.electronics-lab.com/projects/power/023/
[17:32:39] <anonimasu> I think that would be a good way to do it..
[17:32:39] <alex_joni> to generate the -5V you'd need
[17:32:41] <anonimasu> it sounds sane..
[17:33:03] <alex_joni> put some limiting zenners on the signals and it should be safe too
[17:33:03] <pemmet> hio
[17:33:10] <alex_joni> hello pemmet
[17:34:43] <alex_joni> an0n: on -5V I'd use an LM7905 (-5V regulator)
[17:35:20] <alex_joni> pemmet: how's the sauce this time a year?
[17:35:40] <pemmet> fan-freakin'tastic
[17:35:46] <alex_joni> heh
[17:35:55] <pemmet> i'm still wrestling with my ish
[17:36:02] <alex_joni> ish?
[17:36:12] <pemmet> i need to be able to use the spare pin in the paraport for my steppers
[17:36:15] <pemmet> ya..
[17:36:23] <pemmet> that stuff... ish.. junk.. mabob..
[17:36:33] <alex_joni> right.. ish
[17:36:41] <alex_joni> sounds like fish to me
[17:36:44] <pemmet> AKA my senior project i need to have done by the 28th, to graduate
[17:36:44] <pemmet> :D
[17:37:00] <alex_joni> so what's holding you back?
[17:37:11] <pemmet> well... i have a shutdown input for my drive
[17:37:12] <pemmet> s
[17:37:20] <pemmet> and i need to make sure that they are on low constantly...
[17:37:26] <alex_joni> right
[17:37:28] <pemmet> (i dont care about saftey at this point)
[17:37:29] <pemmet> so
[17:37:32] <alex_joni> using emc1?
[17:37:34] <pemmet> i was gonna shove them into the spare one
[17:37:39] <pemmet> emc...
[17:37:42] <pemmet> emc1?
[17:37:55] <alex_joni> yeah.. there's emc (on the BDI's)
[17:37:57] <pemmet> paul was sayin' maybe i shyould use bridgporto
[17:37:59] <alex_joni> and there's emc2
[17:37:59] <pemmet> ya
[17:38:04] <pemmet> i'm just usin' 1
[17:38:06] <pemmet> the firs one
[17:38:12] <alex_joni> latest BDI?
[17:38:14] <pemmet> BDI v.4.08 or some such thing
[17:38:17] <pemmet> 4.12 maybe
[17:38:19] <alex_joni> 4.20?
[17:38:23] <pemmet> ya
[17:38:26] <alex_joni> right
[17:38:38] <alex_joni> hmmm.. here's a thought...
[17:38:44] <alex_joni> what if you tie them to ground?
[17:38:52] <pemmet> well...
[17:38:55] <pemmet> that IS a thought
[17:38:59] <pemmet> and i really got nothi'n to loose
[17:39:01] <pemmet> ...
[17:39:05] <pemmet> i could just do that...
[17:39:12] <pemmet> cram them back into the protoboard...
[17:39:21] <pemmet> on my ground line
[17:39:21] <alex_joni> right.. _IF_ you don't care about safety
[17:39:21] <pemmet> haha
[17:39:27] <pemmet> well they're tiny little steppers on a small littl ebed
[17:39:36] <pemmet> far less dangerous than the other equipment i'm surrounded by
[17:39:41] <alex_joni> well then.. screw them to the ground
[17:39:43] <pemmet> i'm not worried about it going amok
[17:39:44] <anonimasu> hm
[17:40:00] <alex_joni> * alex_joni feels that an0n might disagree
[17:40:04] <anonimasu> alex_joni: why a regulator
[17:40:12] <pemmet> (in fact, they have yet to move!! >:o)
[17:40:25] <alex_joni> you need good power voltages
[17:40:28] <anonimasu> disagree with what?
[17:40:45] <anonimasu> I have a 5v reference, voltage i can tap
[17:40:50] <pemmet> ya.. i think i got the power sorted out.. .but i also think that to date, the compy might ahve been giving a logic-high to the shutdown switch on the drives
[17:41:02] <pemmet> i am usin' the 5v line out of the ocmputer
[17:41:06] <pemmet> and the relative ground for that
[17:41:06] <alex_joni> an0n: +5V yes.. but you need -5V for the opamps
[17:41:18] <pemmet> ...
[17:41:21] <anonimasu> hm ok
[17:41:38] <pemmet> * pemmet goes to ground some ish
[17:41:38] <alex_joni> pemmet: so you're saying the parport is outputting 5V during shutdown?
[17:41:47] <pemmet> yep..
[17:41:52] <pemmet> it is with my modification
[17:41:55] <anonimasu> hm, you should hardwire your stop logic..
[17:41:55] <alex_joni> even when unplugged?
[17:42:10] <pemmet> well when i ran the io-view thing
[17:42:10] <alex_joni> I would love to see that PC
[17:42:25] <pemmet> i tossed together a protobaord with some buffer chips...
[17:42:31] <pemmet> put a five volt line in
[17:42:36] <pemmet> up the current to 20ma
[17:43:03] <pemmet> got paul-the-man's help on that one..
[17:43:15] <pemmet> wouldn't even have a project w/out 'em
[17:43:20] <alex_joni> lol
[17:44:28] <alex_joni> well... I'm kinda tired...
[17:44:33] <alex_joni> I think I'll go to bed
[17:44:48] <anonimasu> :)
[17:44:51] <anonimasu> thanks for the help alex
[17:44:55] <anonimasu> I'll look into it..
[17:44:57] <alex_joni> np
[17:45:02] <anonimasu> I might use a avr with a analog in and a analog out
[17:45:08] <anonimasu> to invert it..
[17:45:14] <anonimasu> might be a easier way..
[17:45:16] <alex_joni> lol
[17:45:22] <alex_joni> now that's absurd ;)
[17:45:30] <anonimasu> wouldnt it?
[17:45:33] <alex_joni> an opamp is about .002$
[17:45:44] <anonimasu> I have avr's laying around..
[17:45:51] <anonimasu> and even if it were to cost $50 ;)
[17:46:18] <anonimasu> attiny15l
[17:46:29] <alex_joni> hmm.. there was an linux command to send messages to users on another tty
[17:46:35] <anonimasu> write
[17:46:37] <anonimasu> or wall
[17:46:37] <anonimasu> ;)
[17:46:37] <alex_joni> but I can't remember what it was
[17:46:41] <alex_joni> thanks
[17:46:50] <anonimasu> or "echo whee > /dev/tty??
[17:46:55] <anonimasu> "
[17:47:15] <anonimasu> alex_joni: http://www.avrfreaks.net/index.php?module=FreaksDevices&func=displayDev&objectid=44
[17:47:17] <anonimasu> a avr like that
[17:47:41] <anonimasu> 5.5v input voltage, which means 5.5v mav analog input..
[17:47:59] <anonimasu> and up to that for the output aswell..
[17:49:03] <anonimasu> or I might just provide my own reference for the sensor..
[17:49:15] <anonimasu> within my range and use the refout as input for a optocoupler..
[17:50:02] <anonimasu> ^_^
[18:02:35] <alex_joni> echo "You will be assimilated" > /dev/tty1
[18:02:49] <anonimasu> ^_^
[18:03:05] <anonimasu> cat /dev/urandom > /dev/tty1
[18:03:18] <alex_joni> lol
[18:03:32] <anonimasu> that's a good way to tell your admin he sucks ;)
[18:04:19] <anonimasu> if he has "mesg y" set ;)
[18:04:44] <anonimasu> alex_joni: ever used ytalk/talk?
[18:05:06] <alex_joni> yeah
[18:05:18] <alex_joni> but here it's not installed
[18:05:18] <anonimasu> * anonimasu likes it
[18:05:18] <alex_joni> ntalk even
[18:06:27] <anonimasu> hm, now it's just a question if I get the avr to work as I want it ;)
[18:07:43] <anonimasu> but that's a pleasant thing
[18:08:39] <alex_joni_> we greet you earthlings
[18:09:16] <anonimasu> alex_joni: wb
[18:10:19] <anonimasu> I'll be back in a bit gonig to go to the kiosk and buy some candy ;)
[18:11:00] <alex_joni_> wha candy?
[18:11:07] <alex_joni_> what even
[18:13:00] <alex_joni_> * alex_joni_ goes to bed
[18:13:03] <alex_joni_> night guys
[18:13:16] <alex_joni_> I'll leave alex_joni to keep you company
[18:46:37] <anonimasu> hm, I wonder where swp is..
[19:26:06] <Jymmm> anonimasu ping
[19:26:31] <anonimasu> ?
[19:26:37] <anonimasu> * anonimasu goes pong
[19:26:41] <Jymmm> anonimasu busy?
[19:26:55] <anonimasu> not really
[20:51:18] <Phydbleep> les: You awake yet?
[20:51:53] <Phydbleep> * Phydbleep pokes les with a stick..
[20:52:57] <Phydbleep> * Phydbleep pulls the stick back and looks for tooth marks..
[20:55:54] <Phydbleep> Nope.. He's asleep. :\
[21:09:41] <Jymmm> or ignoring you or busy or found RL =)
[21:33:24] <Phydbleep> RL?? How dare he.. Doesn't he know that leads to things like a wife and kids???
[21:33:45] <Phydbleep> * Phydbleep should know, Phydbleep has made that mistake in the past.. :)
[21:34:00] <Phydbleep> Hehehe.. :)
[21:35:50] <A-L-P-H-A> that was fun.
[21:36:22] <A-L-P-H-A> Supplier wanted to charge me $18 for a reamer... while it was on sale for $12something. messed up computer system.
[21:36:31] <Phydbleep> A-L-P-H-A: Flogging a lawyer for overcharging???
[21:36:38] <A-L-P-H-A> Yup.
[21:36:46] <Phydbleep> * Phydbleep was 1/2 right.
[21:36:51] <A-L-P-H-A> I complained... as I called in, and asked the price.... and that wasn't the price I was given.
[21:37:08] <A-L-P-H-A> so they checked the system, and the guy was like, sorry yup you're right.
[21:37:19] <A-L-P-H-A> dormer reamer. :)
[21:37:21] <A-L-P-H-A> I'm happy.
[21:37:56] <Phydbleep> * Phydbleep has started printing a copy of the web ad... Make them look really bad when you walk into the state atty gnl's office.
[21:38:13] <A-L-P-H-A> what web ad?
[21:38:18] <A-L-P-H-A> what are you bitching about? :D
[21:39:08] <Phydbleep> When I check a price/availability online and go to buy something.. Print the web ad, it works just like a print ad in a newspaper. :)
[21:39:29] <A-L-P-H-A> yeah... most stores do that.
[21:39:39] <A-L-P-H-A> bigger stores allow that to price compete...
[21:39:48] <A-L-P-H-A> like Staples.
[21:42:29] <Phydbleep> * Phydbleep has a nasty idea involving the 5% price beater deals..
[21:43:46] <Phydbleep> Find 2 stores that advertise the 5% price beater. Go to either one and pick something (have a copy of both ads with you).
[21:45:24] <Phydbleep> Ask to speak to the manager and point out that both ads promise to beat any ad price by 5%, Both store have set themselves into a bidding spiral toward 0. :)
[21:45:59] <Phydbleep> Then, Offer to take $50 to shut up and go away. :)
[21:46:27] <Phydbleep> Lest a passing lawyer hear you and smell money. :)
[21:46:36] <A-L-P-H-A> they won't...
[21:46:54] <Phydbleep> Hehehe.. Yeah, But it sounds so good on paper. :)
[21:48:00] <Phydbleep> And will they really take the risk with the way the states are looking for any excuse to nail some of the bigger companies?
[22:31:04] <A-L-P-H-A> hey dmess. Olympia's computers are messed!
[22:31:25] <A-L-P-H-A> tried to over charge me on a part that was on sale.
[22:31:37] <A-L-P-H-A> crap... all of a sudden I feel tired.
[22:33:13] <dmess> oh well go for a nap..
[23:06:54] <Jymmm> A-L-P-H-A : Pregnant?
[23:43:15] <A-L-P-H-A> luckily, no.
[23:44:07] <Phydbleep> Jymmm: Didn'y you know? He's Canadian.... He's probably low on beer. :)
[23:44:50] <A-L-P-H-A> :)
[23:44:52] <A-L-P-H-A> so true.
[23:45:08] <Phydbleep> Or it's 70 outside and he's starting to melt. :)
[23:45:10] <A-L-P-H-A> well... time to act as the chueffuer (sp)
[23:45:25] <A-L-P-H-A> What's 70 in C?
[23:46:35] <Phydbleep> I don't know.. I know -40 is where the scales meet.
[23:47:29] <Phydbleep> 74F is 23C
[23:48:15] <Phydbleep> Or at least that is what the MythWeather is telling me.
[23:52:45] <Phydbleep> It's phred! :)
[23:52:59] <pfred1> Phydbleep it's Phydbleep
[23:53:23] <pfred1> Phydbleep want to see my new statue?
[23:54:04] <Phydbleep> * Phydbleep is scared...
[23:54:16] <pfred1> Phydbleep she's sexy!
[23:54:52] <Phydbleep> Oh... Had me worried.. Thought it was a statue of you.. :)
[23:55:19] <pfred1> Phydbleep well that'd be sexy too but alas no
[23:55:48] <pfred1> Phydbleep nah this one i picked up at the town dumps
[23:55:54] <Phydbleep> * Phydbleep had horrid visions of Rush Limbaugh in a G-String as well..
[23:56:17] <pfred1> Phydbleep oh please I'm not Rush Limbaugh
[23:56:19] <Phydbleep> You never know what some people will call art. :)
[23:59:40] <Phydbleep> WOAH! Bio-Hazard.... Either the kid just did rude things to a diaper or she's been taking farting lessons from a sailor.. bbiab.. :)