#linuxcnc | Logs for 2012-02-13

[00:07:01] <psha[work]> skunkworks_: if you'll catch me in the evening i'll give you an anwser :)
[00:07:07] <psha[work]> but now i've nothing around to test with
[00:08:38] <skunkworks_> that is ok - I was trying to answer a question from automata (before you logged on.
[06:10:37] <Loetmichel_> re @ home ... eute mal heimarbeit :-)
[06:11:42] <mazafaka> I am also thinking about sauerkraut and steamed potato, Loetmichel_ :)
[06:11:57] <Loetmichel_> oh, sorry
[06:12:04] <mazafaka> If I've understood you correctly
[06:12:28] <Loetmichel_> should be "re @ home, working the second half of the day from home"
[06:12:31] <mazafaka> My German isn't really good.
[06:12:43] <mazafaka> Oh
[06:13:01] <mazafaka> Almost near the right meaning.
[06:14:03] <Loetmichel_> ... i have to build a Computer case prototype... and my Company has no CNC. but i have ;-)
[06:14:41] <mazafaka> how will you provide the rigidity of the computer case?
[06:15:06] <Loetmichel_> not the complete case, just some supplements
[06:15:33] <Loetmichel_> http://www.cyrom.org/palbum/main.php?g2_itemId=10883 <- this
[06:15:43] <Loetmichel_> http://www.cyrom.org/palbum/main.php?g2_itemId=10880
[06:15:50] <Loetmichel_> http://www.cyrom.org/palbum/main.php?g2_itemId=10886
[06:16:25] <mazafaka> yeah, that rotating USB port
[06:16:51] <Loetmichel_> and this with more Port holes: http://www.cyrom.org/palbum/main.php?g2_itemId=12575
[06:18:44] <Loetmichel_> and maybe the Powerswitch/lock holder from this: http://www.cyrom.org/palbum/main.php?g2_itemId=12469&g2_imageViewsIndex=1
[06:19:01] <mazafaka> how will you create those sinks for the bolts' caps? Will you use some large drill bit or just use CNC with some small drill bit?
[06:20:51] <Loetmichel_> which bolts?
[06:21:51] <Loetmichel_> ah, in the back plate?
[06:22:05] <Loetmichel_> small mill bit and CNC it
[06:23:05] <Loetmichel_> the PITA part on the backplate is that the surface of the aluminium is already grinded. so every scratch/fingerprint is VERY visible
[06:23:26] <Loetmichel_> i think i will mill it and then sand it again with a belt sander
[06:23:40] <Loetmichel_> you really see the tiniest scratch on this
[06:23:42] <Loetmichel_> :-(
[06:28:55] <awallin> diy computer case with completely passive cooling would be a nice project... I wonder if there are plans/ideas online?
[06:30:05] <Loetmichel_> awallin: i dont think so
[06:31:24] <Loetmichel_> 'cause even with a passive CPU/GPU cooler and a passive PSU You HAVE to have a fan in the case to provide the various SPS and rams and components with adequate moving air
[06:49:57] <archivist> not if you use an aluminium contact heatsink to all parts needing cooling, need some fancy cnc work to make it
[06:50:28] <archivist> and a gallon of heatsink goo
[06:56:58] <Loetmichel_> hihi
[06:58:18] <archivist> or just use pure distilled water
[06:58:50] <archivist> iirc there are some using oil cooling
[06:59:11] <Loetmichel_> submerge the whole Mainboard in Perfluorcarbon and use an external passive heatsink. Problem solved ;-)
[07:14:50] <Valen> I have seen a passive watercooled design
[07:14:52] <Valen> no pumps
[07:15:01] <Valen> just a 4ft cooling tower
[08:42:19] <mazafaka> interesting
[08:50:16] <FinboySlick> A2Sheds: Been looking into that EOMA-68 mini-wonder... When do I get it and a mini-engineering board?
[09:18:09] <A2Sheds> FinboySlick: the first boards should still be done by the end of the month
[09:22:13] <A2Sheds> FinboySlick: you should be able to get as many you want in March
[09:57:45] <Loetmichel_> soooo, plastics done, now the aluminium parts... -> http://www.cyrom.org/palbum/main.php?g2_itemId=12843
[10:05:06] <jdhNC_> what is it?
[10:10:16] <FinboySlick> jdhNC_: My thoughts exactly ;)
[10:10:46] <FinboySlick> Though I'm pretty sure the thing at the top is a digital caliper.
[10:16:36] <sirhoax> Loetmichel_, is that acrylic or polycarbonate?
[10:16:56] <sirhoax> had a lot of difficulty with plexiglass/acrylic.
[10:17:05] <sirhoax> with no cooling/lubricant.
[10:17:33] <sirhoax> guess i have to get the speed up on this machine.
[10:17:52] <sirhoax> might help a bit.
[10:21:50] <sirhoax> Loetmichel_, you do very nice work.
[10:25:13] <JT-Shop> sirhoax: with plasitcs you have to cut a big enough chip to pull the heat out or it melts...
[10:25:50] <sirhoax> yea i was continually getting that blob of plastic on the bit.
[10:26:08] <sirhoax> would create its own custom fillet chamfer.
[10:26:11] <sirhoax> :-)
[10:26:25] <sirhoax> frustrating, then i tried spraying with lithium grease.
[10:26:25] <archivist> and sharp tool so it cuts not rubs
[10:26:30] <sirhoax> helped a bit.
[10:28:31] <Jymmm> sirhoax: Problem solved... http://www.plasticrouting.com/
[10:29:20] <sirhoax> Jymmm, nicey nice.
[10:29:41] <Jymmm> and they work very well too!
[10:29:43] <sirhoax> right now, basically using those overpriced homedepot bits.
[10:29:53] <Jymmm> just ask JT-Shop
[10:30:34] <Jymmm> and his finger
[10:45:57] <sirhoax> why what happened to your finger?
[10:47:13] <JT-Shop> I got close to the edge of an Onsrud end mill for plastic and started to bleed
[10:47:20] <JT-Shop> their that sharp
[10:48:49] <Jymmm> sirhoax: JT-Shop just got *CLOSE* to it, not actually made contact and he started to bleed!!!
[10:49:28] <sirhoax> what is the life on them?
[10:49:40] <sirhoax> heh. sounds sharp. ;-)
[10:49:42] * Jymmm would hate to see what would happen if JT-Shop had given it a dirty look!!!
[10:50:14] <Jymmm> sirhoax: life doesn't matter, they are the only thing that works for plastic, period.
[10:50:32] <Jymmm> Though, they are carbon fwiw.
[10:51:09] <sirhoax> k. might have to bite. and get a few.
[10:51:16] <archivist> carbon steel can have a sharper edge
[10:52:25] <Jymmm> sirhoax: what are you going to be doing with them?
[10:54:01] <sirhoax> some scrap, i got my hands on 1/2" plexiglass.
[10:55:46] <Jymmm> 65-012
[10:55:54] <Jymmm> 37-52
[10:56:22] <Jymmm> 37-62
[10:56:30] <Jymmm> 37-03
[10:57:05] <Jymmm> sirhoax: take a look at those and the 1/4" version of 65-012
[11:05:00] <Loetmichel_> polycarbonate
[11:05:56] <Loetmichel_> FinboySlick/ jdhNC_ : that: http://www.cyrom.org/palbum/main.php?g2_itemId=10880
[11:06:13] <sirhoax> yea polycarbonate just mills better.
[11:06:43] <sirhoax> nice clean chips come off the material.
[11:06:44] <Loetmichel_> JT-Shop was meant
[11:07:33] <Loetmichel_> JT-Shop: no, acrylics mill even better... if you have some soap water in your flood cooling ;-)
[11:08:22] <Loetmichel_> its a USB-stick holder fpr a Tempest-proof PC.
[11:09:13] <Loetmichel_> so the stick is in a "5,25" drive slot" and dissappears, so the fron can be closed
[11:11:00] <Loetmichel_> ... for a computer like this one: http://www.cordsen.com/images/CE_Media/_img_pdf/ATS-5000T%20Series_eng.pdf
[11:11:31] <sirhoax> does that usb turn in ?
[11:11:36] <Loetmichel_> yes
[11:11:38] <sirhoax> nice.
[11:11:55] <Loetmichel_> http://www.cyrom.org/palbum/main.php?g2_itemId=10883
[11:12:07] <Loetmichel_> http://www.cyrom.org/palbum/main.php?g2_itemId=10886
[11:12:48] <sirhoax> Loetmichel_, what bits are you currently using for milling acrylic?
[11:13:12] <Loetmichel_> we have a "drawer-type" usb slot ... but in the small Case there is no room for it. so i thought up the turning one
[11:13:45] <Loetmichel_> sirhoax: a one-lip TC cutter
[11:14:07] <skunkworks_> wow - I don't know how I did it but when I started using chatzilla I managed to get it loading emc and emc-devel automatically. Now I cannot get them to stop loading. They are not marked as 'open this channel at startup'
[11:15:02] <Loetmichel_> http://mmetoolshop.homepage.t-online.de/shop/show_product.php?cPath=59_63&products_id=90
[11:15:09] <Loetmichel_> like this one
[11:15:17] <sirhoax> k. thanks.
[11:19:51] <Loetmichel_> *BAAAAHH*.... the aluminium sheets are _the_ swiss cheeese.
[11:20:00] <Loetmichel_> first one nearly done...
[11:35:07] <pcw_home> skunkworks is it here? preferences/global settings/startup
[12:16:37] <IchGuckLive> hi all around the world
[12:22:42] <FinboySlick> Loetmichel_: That'S pretty cool.
[12:25:20] <DJ9DJ> hi ham! :D
[12:28:20] <Loetmichel_> FinboySlick: its also really heavy. The small case aloen without innards weights about 10kg ;-)
[12:28:36] <Loetmichel_> its 3mm aluminium welded szut
[12:28:44] <Loetmichel_> shut along all seams
[12:28:51] <FinboySlick> Loetmichel_: What's inside? An SBC?
[12:30:04] <Loetmichel_> sbc, a mini-itx, a µatx or a normal ATX board
[12:31:41] <Loetmichel_> the actual demo machine i am building has a fullsize atx board with 8GB ram, a GF GT250 and a I7-2600k
[12:32:13] <Loetmichel_> so i had to make some compromize. the case it crammed full, there is a mini ATX PSU to fit inside.
[12:32:27] <Loetmichel_> "only" 400W, but should be sufficient.
[12:33:01] <Loetmichel_> bit the thermal stress test is pending, so maybe i have to make some more openings and insert fans ;-)
[12:33:07] <FinboySlick> You have active cooling?
[12:33:15] <FinboySlick> Oh hehe, you preempted me.
[12:33:57] <Loetmichel_> atm only the PSU fan is pushing air outside
[12:34:15] <Loetmichel_> and the front bezels are drilled to let air in
[12:34:33] <FinboySlick> Well, if there's a spot for air to come in on the opposite side, it could well be enough.
[12:34:42] <FinboySlick> Damn, preempted me again.
[12:34:46] <Loetmichel_> look at the PDF
[12:35:02] <Loetmichel_> [18:02] <Loetmichel_> ... for a computer like this one: http://www.cordsen.com/images/CE_Media/_img_pdf/ATS-5000T%20Series_eng.pdf
[12:35:55] <Loetmichel_> You can see the front being drilled in masses and the two 60mm "fan openings" in the back
[12:46:30] <IchGuckLive> Loetmichel_: at reichelt 90Euros
[12:46:51] <IchGuckLive> Artikel-Nr.: NOAH CRS3988B80
[12:47:04] <Loetmichel_> what?
[12:47:12] <IchGuckLive> case
[12:47:29] <Loetmichel_> ???
[12:47:48] <IchGuckLive> the case from the pdf
[12:48:04] <Loetmichel_> you noticed that i work for a company which makes Computers for the military?
[12:48:18] <DJ9DJ> :D
[12:48:44] <Loetmichel_> no, the case is done by a sheet metal manufacturer, construction is from our company
[12:48:46] <IchGuckLive> army.mil.com B)
[12:49:44] <Loetmichel_> its constructed to be VERY quiet in the Electromagnetic radiation
[12:50:14] <Loetmichel_> ... about 60 dB BELOW the limits for CE EMV
[12:50:23] <IchGuckLive> 0,5mm solit cold steael
[12:50:42] <Loetmichel_> 3mm Aluminium welded shut along ALL seams ;)
[12:51:08] <IchGuckLive> i readet this thats shilded O.O
[12:53:08] <IchGuckLive> rain on -5deg cold street i think i need a chain on the wheels tomorrow
[12:53:22] <DJ9DJ> hmm. +1.8 here :D
[12:56:02] <IchGuckLive> compare as I left LA on Saturday 21 DEG C 70F
[12:57:34] <Loetmichel_> and the gaskets you see at the front are made of silver/nickel sputtered nylon fabric, so they are conductive, too ;-)
[12:57:49] <Loetmichel_> (and on every other lid of the case also ;-)
[12:58:39] <IchGuckLive> igot this sheeds here 2 "Neusilber zum ätzen der Frontpanels "
[12:58:50] <Loetmichel_> FYI: such a computer costs about 8kEur++ (depends on the parts in it). PLUS 3kEur for the 19"monitor
[12:59:17] <Loetmichel_> i dont know what my boss charges for the new 24" model, but it wont be cheaper ;-)
[12:59:21] <IchGuckLive> mil thinks are alwayt 10times over paid
[12:59:37] <IchGuckLive> but as garbich nice to get
[12:59:38] <Loetmichel_> no, its more or less handcrafted
[12:59:53] <Loetmichel_> on this prototype i sit 2 weeks already
[12:59:59] <Loetmichel_> and thats not the end of it
[13:00:40] <IchGuckLive> beaware of galxy desine shapes copy patents O.o
[13:00:43] <Loetmichel_> the case alone costs us about 300 eur. PLUS 120 eur fir the front flap
[13:01:13] <Loetmichel_> IchGuckLive: could you rephrase that?
[13:02:03] <IchGuckLive> with mil no factor
[13:02:46] <Loetmichel_> still dont understand
[13:04:15] <IchGuckLive> There are Varius Case Patents for MINI ATX in place as you may have hread about the Galxy 1Mio Dollar frar on there copy of the backbone case from apple
[13:04:49] <IchGuckLive> at your messurments no factor
[13:04:54] <Loetmichel_> does not apply here 'cause the case ISNT atx form factor
[13:05:14] <Loetmichel_> if you have noticed: the back has no opening for the atx bezel
[13:05:38] <Loetmichel_> there are filters in between the Board and the back plate
[13:05:44] <IchGuckLive> you dont need to car anyway at mil production
[13:05:47] <Loetmichel_> and adapters to Dsub9
[13:05:51] <Loetmichel_> from USB for example
[13:05:57] <FinboySlick> It'd be a cute case in the US. The military can infringe on the 4th amendment but not on a patent ;)
[13:06:33] <Loetmichel_> we are not mil exclusively, any company which want not to be eavesdropped can buy the systems
[13:06:57] <FinboySlick> Loetmichel_: I know. I was just musing the irony.
[13:07:29] <Loetmichel_> it would
[13:08:13] <Loetmichel_> but on the other side: it wouldnt: desings cant be patentet, and even if they are: older use strikes ;-)
[13:09:05] <IchGuckLive> agree
[13:09:37] <Loetmichel_> we have evidence for every part we build wehen we designed it, so if one wants to sue us he has to proof that he designed it earlier
[13:11:13] <Loetmichel_> ... as a matter of fact, we just have it the other way round: we were notices by the BSI that one cometitor sent in a Computer which looks like our old model. To the last screw, even the same color scheme...
[13:11:26] <Loetmichel_> noticed
[13:11:44] <IchGuckLive> thats the way it is
[13:12:03] <Loetmichel_> fortunally the Clerc at BSI who certifies our computers has got hold of it...
[13:12:16] <IchGuckLive> Bye til tomorrow
[16:07:05] <DJ9DJ> gn8
[17:09:46] <Tom_L> new resolver interface chip: http://www2.electronicproducts.com/32_bit_MCU_features_resolver_interface-article-ICDJH01_Apr2012-html.aspx
[17:10:36] <andypugh> $60 per channel though...
[17:10:56] <Tom_itx> i was just reading my email..
[17:19:25] <andypugh> Tom_itx: And? Or are you Tom_L too?
[17:28:47] <Tom_itx> yup
[18:05:36] <rob_h> using a 7i48 unless there is no output on the Aouts unless you enable pwmgen.00.enable , is this correct?
[18:07:10] <rob_h> as u can leave any of the othere pwmgens enabled or disabled , but pwmgen 0 must be enabled for anything to work it seems
[20:28:44] <Jymmm> cnc edm turning auction http://sfbay.craigslist.org/sby/tls/2850320774.html
[20:39:21] <sirhoax> http://youtu.be/TYf8TusQS4A
[22:39:07] <FinboySlick> A2Sheds: Hmmm... Just read that the Cortex A8 has VFP-Lite... Is this true for the Allwinner A10 too?
[22:55:31] <Gensor2> Is clytle374 or A2Sheds available?
[22:57:20] <Gensor2> Looking for power supply assistance, will pay cash
[23:25:46] <mrsun_> ough time to go do my first day as a electrician "aprentice" or whatever i should call it (unpayed work :P ) ...
[23:25:59] <mrsun_> just an hour of driving there ...