#linuxcnc | Logs for 2012-02-21

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[00:22:56] <Connor> anyone have a R8 Collet Rack? Can you tell me the hole diameter and distance between centers on it ?
[00:27:15] <jdhnc> not me... are you making one?
[00:27:23] <Connor> yea
[00:27:33] <jdhnc> I did get some more yet to be used tooling last week :)
[00:27:35] <Connor> http://colletizer.com/r8.html
[00:28:06] <jdhnc> for $20, I'd just buy that one.
[00:28:26] <Connor> The top tier is going to have more spacing..
[00:28:37] <Connor> for other stuff like the boring head and drill chuck.
[00:29:30] <andypugh> For $20 I would buy 2 and waste some holes :-)
[00:29:46] <Connor> Trying to figure out how they connected the tiers together..
[00:29:48] <andypugh> Though I am really not a fan of R8
[00:29:51] <Connor> looks like PVC brick molding.
[00:30:18] <jdhnc> looks like just Z-bent steel?
[00:30:29] <Connor> no, They say it's PVC
[00:31:04] <jdhnc> why don't you like R8?
[00:31:11] <andypugh> It's too long
[00:31:54] <Connor> Back in a bit.
[00:31:58] <jdhnc> true, but it's what came with the mill.
[00:32:19] <andypugh> And because it is parallel, you need to lower the bed by the full 4.5" to get it out. CAT30/BT30 is about the same size, but drops out in a fraction of the headroom.
[00:40:32] <jdhnc> wonder how much space you lose with an R8->whatever adapter
[00:40:59] <jdhnc> ER32/40 are 32/40mm?
[00:42:47] <andypugh> It's an approx diameter of the outside of the collet, I think
[00:43:27] <andypugh> http://www.arceurotrade.co.uk/Catalogue/Collets/ER-Collets-Collet-Chucks
[00:44:23] <jdhnc> I'm stuck working graveyard shift for a few days... I thought I'd never have to do that.
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[00:48:15] <andypugh> Haven't seen these before, right-angle heads driven by the coolant flow... http://www.eltool.com/Products/AngleHeads.aspx (which leaves the spindle free to position them). Rather clever.
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[00:54:17] <kb8wmc> andypugh: are you familiar with the necessary electronics for reprap machines and if so, do you have any recommendations?
[00:54:43] <andypugh> No, sorry. I know nothing about them.
[00:54:54] <kb8wmc> ok...thanks
[00:55:50] <kb8wmc> anyone in the group that you know of familiar with repraps?
[00:57:30] <andypugh> There are a few names here: http://objects.reprap.org/wiki/Builders/EMCRepStrap
[00:57:57] <kb8wmc> ok...thanks andy....
[00:59:11] <andypugh> And time to sleep. Night all.
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[07:05:57] <Jymmm> cradek: jepler SWPadnos alex_joni Paste this into google: sqrt(cos(x))*cos(300x)+sqrt(abs(x))-0.7)*(4-x*x)^0.01, sqrt(6-x^2), -sqrt(6-x^2) from -4.5 to 4.5
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[07:47:10] <DJ9DJ> moin
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[08:36:32] <Jymmm> The world really is binary... http://27.media.tumblr.com/tumblr_luaffcycHP1qfansjo1_500.jpg
[08:41:47] <pjm> good morning
[08:42:08] <jdhnc> I don't know that I would say 'good' exactly.
[08:42:19] <pjm> lol me neither ;-)
[08:42:27] <pjm> almost the weekend anyway! yay
[08:42:35] <jdhnc> really?
[08:42:37] <pjm> + pancake day today
[08:42:42] <jdhnc> I must have missed a day or three.
[08:42:53] <pjm> lol, be positive
[08:43:01] <pjm> monday is 'almost' the weekend!
[08:43:12] <jdhnc> I'm positive I would rather be at home asleep than 'working'
[08:43:29] <pjm> hhh good idea yes
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[09:02:59] <cncbasher> mhabeler> online ?
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[09:17:03] <mhaberler> yes
[09:17:14] <cncbasher> hi
[09:17:17] <mhaberler> hi!
[09:17:30] <cncbasher> just reply'd to your query
[09:17:41] <cncbasher> change ini display entry to gscreen
[09:17:45] <mhaberler> AHA
[09:18:03] <cncbasher> instead of axis etc
[09:19:20] <cncbasher> once open the preferences page gives you exit command , and also you can change out of full screen mode
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[11:51:16] <Tectu> anyone here printed with EMC?
[11:54:31] <archivist> I think there is something on the wiki, what kind of printing
[11:56:33] <archivist> silk screen http://www.youtube.com/watch?v=0RH_H7jgQQY
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[12:22:52] <Tectu> archivist, 3D printing, reprap etc
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[13:16:14] <awallin_> Tectu: http://reprap.org/wiki/EMCRepRap 2 or 3 things to consider for 3d printing if you have a xyz-router: temp-control of extruder and/or bed. Extruder control (A-axis works for linuxcnc).
[13:17:35] <Tectu> awallin_, i allread read that, I am just not sure about how to set up the extruder to EMC
[13:18:06] <awallin_> depends on your extruder. what motor/drive does it have?
[13:18:58] <Tectu> at the moment none. I just have an XYZ mill, with NEMA 17 motors, controller by L297 and wired up to the parallel port and controlled with EMC
[13:19:12] <Tectu> I know that i need an extruder and an extruder controller
[13:19:19] <Tectu> and then?
[13:19:37] <awallin_> change the emc config to include an A-axis
[13:19:51] <Tectu> okay
[13:19:57] <awallin_> figure out where on the parallel port you want the a-axis step/dir. wire them to extruder controller.
[13:20:21] <Tectu> how does EMC know how to work with A axis? when to go step forward, when backward etc
[13:20:53] <awallin_> the g-code for printing should include A-axis commands whenever you want plastic
[13:21:15] <awallin_> last I tried it was not that hard to get this kind of g-code from repstrapper(?) or skeinforge
[13:21:32] <Tectu> which one do/did you use?
[13:21:34] <awallin_> I think those programs usually output an "E" axis, but that can be changed to "A"
[13:22:07] <awallin_> I don't really use any actively. It seems slic3r is quite popular now (?)
[13:22:39] <awallin_> you can also do active temp-control with LinuxCNC if you want (and if you have parallel port pins to spare)
[13:23:51] <Tectu> btw, is skeinforce better than the repstrap software?
[13:24:45] <awallin_> my impression is that skeinforge has grown to be a very large and complicated thing. lots of settings. I think slic3r tries to be friendlier to use.
[13:25:35] <Tectu> ok, thank you
[13:30:42] <Tectu> awallin_, are the results from a real reprap generally better than from an EMCRepStrap?
[13:31:55] <awallin_> I don't know. I would think with the right g-code and settings the EMC/LinuxCNC control would be as good or better than the arduino based controllers used on makerbot etc
[13:32:51] <awallin_> some of the arduino hacks are quite naive (i.e. trajectory without acceleration ramps etc)
[13:34:28] <Tectu> ok
[13:34:35] <DJ9DJ> hi Tectu!
[13:34:40] <Tectu> hello DJ9DJ
[13:34:47] <Tectu> _DJ_? ;-)
[13:35:01] <DJ9DJ> indeed :D
[13:35:08] <Tectu> good to see you, sir ;)
[13:35:16] <DJ9DJ> hrhr
[13:35:50] <Tectu> btw, i installed the EMC liveCD on my harddrive a few weeks ago. I decided to make the updates today. When I start EMC now, i get errors about the realtime delay things. Did i break something with the updates? There were no linux kernel related updates
[13:36:30] <DJ9DJ> hmm, i am also doing every update... no problems yet
[13:37:08] <Tectu> I guess i can also install things like CAD programms, skeinforce etc. on the EMC image, without breaking something, right?h
[13:38:17] <DJ9DJ> i would think so :)
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[14:03:24] <mazafaka> On lathe, g1 x-something z90 will make a move of a support happening while axis Z rotates at the same time?
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[14:05:27] <awallin_> mazafaka: g1 should produce moves that start and end at the same time.
[14:05:44] <mazafaka> ok
[14:07:11] <mazafaka> I milled on lathe and realised it makes such a move.
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[14:08:36] <mazafaka> 'CNC programming handbook' generally repeats the basic stuff you need to understand to create the detail and also introduces the G-code, or does it have something else? Did you read this book?
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[14:08:54] <awallin_> by peter smid?
[14:08:58] <mazafaka> yes
[14:09:17] <awallin_> it has the basics. workpiece offset, tool offset, etc.
[14:09:28] <awallin_> nothing 3D or CAM
[14:09:39] <mazafaka> I look into set of some CNC-related books in my computer and want to omit many of them.
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[14:10:07] <mazafaka> Yeah, I can ask my coworker about it.
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[14:10:55] <mazafaka> Is it true inserts have information on chip load and cutting speeds on their pack?
[14:13:33] <awallin_> I would try the phone-book size catalog instead (or pdf online)
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[15:00:01] <archivist> never seen much more than part numbers on a pack, note part number encodes some detail in some cases
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[16:37:07] <mrsun> must be next to impossible to "tram" a router cnc machine ...
[16:37:23] <mrsun> such huge tables, made of steel or alu .. bends and twists everywhere
[16:39:31] <awallin_> 4 or 5 digits of precision is a challenge on any size machine I would think...
[16:40:17] <bill20r3> Doesanyone know if 4th-axis is in the roadmap for pycam?
[16:40:50] <mrsun> awallin_, hell even 1 digit precision should be a challenge on one of those machines =)
[16:41:02] <awallin_> just saying "4-axis" doesn't specify a toolpath-strategy very well
[16:41:31] <awallin_> mrsun: +/-1 mm might be fine on a wood-router with 2x3m table..
[16:41:48] <mrsun> ye i guess =)
[16:42:38] <awallin_> bill20r3: you need to post links to pictures/videos of the kind of toolpath you envision. Some 4-axis things are trivial additions to opencamlib, others not so trivial. I can't speak for pycam.
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[16:47:12] <bill20r3> I'm thinking of things like cutting a gear, with the rotary axis's centerline parallel to "X"
[16:53:28] <archivist> bill20r3, trivial to hand code
[16:54:12] <archivist> not so trivial to write cam software as fas as I can see
[16:54:20] <archivist> fas/far
[16:54:48] <bill20r3> would you do it by cam'ing a flat version of a single tooth, then adjusting for the curve, and changing X - > A ?
[16:54:54] <bill20r3> (I hope that makes any sense)
[16:55:16] <archivist> the big problems for gear cutting are touch off and cutter centring on the a axis
[16:55:41] <bill20r3> yy.
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[16:56:14] <archivist> did you ever see my escape wheel vid?
[16:57:52] <archivist> bill20r3, also hand coded http://www.youtube.com/watch?v=adT8Dr5JZ4c
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[17:01:48] <archivist> I originally wrote a cam script for straight cut gears but dropped it for hand coded gcode because it made more sense
[17:03:11] <bill20r3> nope.
[17:03:12] <bill20r3> linky?
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[17:03:29] <archivist> see above
[17:04:25] <archivist> wow the helical vid has 500k views!
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[17:11:43] <archivist> bill20r3, I also wrote a gear generating gcode which needs rackform cutter, also not sure if camable
[17:12:15] <bill20r3> <--- not an actual machinist, googling 'rackform cutter'
[17:13:08] <archivist> bill20r3, its the hobbing process
[17:13:13] <bill20r3> ahh.
[17:13:18] <archivist> ish
[17:14:18] <archivist> but that can be done another way as andypugh did it with gears axes
[17:14:28] <archivist> gears/geared
[17:16:45] <bill20r3> it seems as if "Step1" is always "buy more tooling" :-|
[17:17:28] <archivist> not always, with one offs I make tooling
[17:18:09] <archivist> or as in that verge escape wheel, cheat use a standard tool and re purpose in code
[17:21:02] <archivist> even that slitting saw arbor is home made in a few minutes from materials lying around
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[17:35:18] <archivist> bill20r3, I needed to thread mill, tooling is expensive http://www.archivist.info/cnc/stage6/p1010245.jpg do it yourself cheap
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[17:40:13] * bill20r3 looks.
[17:43:30] <bill20r3> clever. I could probably manage something like that.
[17:44:24] <archivist> that is a lathe insert that I used
[17:46:46] <Loetmichel> yaaaawn... thats endless again. first of the housings milled in one hour.(drillings still pending)... 2 to go. and i have set the mill to F1200 (6mm TC 2 flute bit, 0,2mm depth full cut in AlMg3)...
[17:46:59] <Loetmichel> Waiting...
[17:48:12] <Loetmichel> 18kRPM...
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[18:03:34] <IchGuckLive> hi all around the Globe
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[18:27:44] <Loetmichel> *gnaaaahh* will taht EVER end? http://www.cyrom.org/palbum/main.php?g2_itemId=12882 <- started 16:30, now its 19:30... ant one outside and one complete hoising to go...
[18:28:38] <Loetmichel> ... maybe i should had made only ONE part like my company needed, not 3 for which i had a fitting scrap aluminium .... :(
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[18:56:01] <Jymmm> JT-Shop: http://msnbcmedia.msn.com/i/MSNBC/Components/Photo/_new/120207-snow-white-tattoo-5a.jpg
[18:56:21] <bill20r3> creepy
[18:57:28] <Jymmm> JT-Shop: I'm not exactly sure what Bambi and Thumper are doing in Snow White though =)
[18:57:42] <bill20r3> watching.. waiting...
[18:57:47] <bill20r3> TO ATTACK!
[18:58:59] <IchGuckLive> hi is there a low cost driver for a dc brush motor with quatra Encoder to drive with step dir on ebay ?
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[19:03:02] <IchGuckLive> there are lots of this motors out but i cant find any driver
[19:04:36] <IchGuckLive> based on the voltage amp i see l6203 for a driver chip and pic note AN696 for control
[19:04:59] <IchGuckLive> but there is no ready made thing available to plag and play with
[19:06:32] <IchGuckLive> or for basic info -> are the Servo Motors of a Axis controled in a other way
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[21:36:08] <FinboySlick> Loetmichel: Are you cutting this dry?
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[21:49:32] <Loetmichel> FinboySlick: more or less
[21:50:15] <FinboySlick> Loetmichel: Bit of a spray from time to time then?
[21:50:30] <Loetmichel> a bit water/detergent/oil mix pumpsprayed on from time to time
[21:50:55] <FinboySlick> OK
[21:51:01] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=12882
[21:51:12] <Loetmichel> looked like this a few hours ago
[21:51:25] <Loetmichel> now i am done... WAY to late...
[21:51:58] <Loetmichel> my boss cant begin to imagine how much hours i do here after work
[21:52:40] <FinboySlick> Loetmichel: Hehe, that's how you guys can afford to bail out Grece!
[21:52:54] <Loetmichel> maybe
[21:53:29] <FinboySlick> You glued the part to it?
[21:53:33] <Loetmichel> more like how my boss can afford to hold the company with to few customers
[21:53:36] <Loetmichel> right
[21:54:01] <Loetmichel> cyan acrylate
[21:54:11] <FinboySlick> Cool :)
[21:54:24] <Loetmichel> you only have to worry about temperature
[21:54:44] <Loetmichel> if the workpiece exceeds 120°c the glue will melt ;-)
[21:55:43] <FinboySlick> Might come in handy when it's time to snap the finished part off though.
[21:56:18] <Loetmichel> yes
[21:56:18] <JT-Shop> whew long day at the rubber factory
[21:58:10] <Loetmichel> ... or do it the other way round: cool it with ice spry, then give it a sideways whack with a wooden hammer ;-)
[21:58:14] <Loetmichel> works also
[21:59:07] <Loetmichel> <-bedtime, wife is already callin
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[22:10:36] <craynerd> Hello, has anyone wired a 6 wire stepper motor. Could you give me some advice?
[22:11:25] <craynerd> I believe I have to terminate two wires, but not sure which two
[22:14:48] <andypugh> There are two sets of three wires.
[22:15:15] <frysteev> craynerd: i believe in a 6 wire there is 2 wires you dont use, if you are using a 4 wire driver,
[22:15:35] <andypugh> The wires are the two ends and the middle of each of the two separate windings.
[22:15:43] <frysteev> if you were using an 8 wire there is 2 pairs you tie together
[22:15:52] <andypugh> Are you using a bipolar or unipolar driver?
[22:16:05] <andypugh> And do you have a multimeter?
[22:16:26] <andypugh> (You can figure it out without a multimeter)
[22:17:22] <andypugh> If your driver only has A+ A- B+ B- terminals then it is a bipolar one.
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[22:20:22] <MattyMatt_> hi all, can I copy a stepconf file from a 8.04 cd install to a 10.04?
[22:21:22] <andypugh> You can, but I don't know that it will work :-)
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[22:22:10] <andypugh> The actual config will almost certainly work, and I think that the stepconf format is at least reasonably backwards-compatible.
[22:22:26] <andypugh> craynerd: Are you still there?
[22:22:44] <MattyMatt_> I'll "edit an existing config" that seems like a good compromise :)
[22:23:40] <andypugh> I don't like to go back to stepconf once it is working anyway, I prefer to tweak by hand.
[22:23:58] <andypugh> (I just wish gedit did tab-completion)
[22:24:48] <MattyMatt_> it's just getting the pins in for these 4-axis boards I need
[22:25:53] <MattyMatt_> I've got a dead board to revive, so I want the working config off my mill machine, without 17 return trips between rooms :)
[22:26:15] <MattyMatt_> or I could use pen and paper I guess. hi tech ftw
[22:27:32] <MattyMatt_> even better plan, print the 4-axis manual
[22:28:20] <DJ9DJ> gn8
[22:28:38] <MattyMatt_> would setting up a share affect the latency badly, with a grotty nic?
[22:28:59] <andypugh> I have all my machines sharing with each other
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[22:29:21] <andypugh> pen and paper is work, take photos of the screen with your phone.
[22:29:22] <MattyMatt_> when I was copying the .iso over my network I was getting 100% cpu with 4MB/s
[22:30:11] <MattyMatt_> my cam is more work than it needs to be :p sometimes it turns on fully when you open the cover
[22:30:39] <MattyMatt_> I opened it up once and it's got a very small sparc chip :)
[22:31:22] <MattyMatt_> but I didn't fancy digging deep enough to clean the lens cover switch
[22:31:59] <MattyMatt_> to many flexi pcbs and shiz
[22:33:37] <andypugh> I took my iPhone apart a bit ago, to fit a new back. It wasn't that bad.
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[22:51:52] <skunkworks_> yay - emc and emc-devel don't open in chatzilla anymore
[22:52:11] * skunkworks_ finally figured what he did
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[23:08:02] <MattyMatt_> my camera is an olympus. an even stronger stench of boardroom evil coming off the pcb >:)
[23:09:14] <MattyMatt_> I got an error when I tried to jog in the axis test, is that normal for a raw 10.04 cd install with no updates?
[23:13:39] <andypugh> Which error?
[23:13:57] <andypugh> (And did it actually jog?)
[23:14:36] <MattyMatt_> board is still dead afaik, so I wouldn't know that. I'm afraid I didn't note the error
[23:15:02] <MattyMatt_> I'll write it down if it happens again after updates
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[23:19:47] <MattyMatt_> will there be a log file somewhere with emc2 errors?
[23:21:16] <andypugh> 'appen
[23:21:32] <andypugh> But possibly not that one.
[23:21:36] <MattyMatt_> on another subject I should make a little debugging board with switches and leds for all the pins
[23:22:03] <MattyMatt_> does stepconf do the axis test itself or does it call emc2?
[23:22:48] <MattyMatt_> the traceback went something like on_jog_button_pressed to something hal_ prefixed
[23:23:33] <MattyMatt_> I'll try and be more specific if it fails again after the updates :)
[23:25:14] <MattyMatt_> I changed the ccfl tube in this laptop, but I haven't got it positioned quite right so I can only use this lappy at nighttime until I have another go
[23:25:55] <MattyMatt_> the old tube had rubber grommets to centre it in its space and I forgot to transfer those
[23:26:33] <MattyMatt_> I'm still quite chuffed with myself that I got it half working tho
[23:26:44] <andypugh> A "Laptop of the Night" ?
[23:27:03] <MattyMatt_> what sweet music it would make, if the ALSA install hadn't failed
[23:27:29] <MattyMatt_> actually I only read that in the log, it made the bootup noise
[23:27:55] <andypugh> I think boot noises are a lot more low-level
[23:28:14] <MattyMatt_> 12GB hdd, no led zep mp3 discography
[23:29:06] <andypugh> MIDI might fit :-)
[23:29:43] <MattyMatt_> kingspec make pcmcia sdd, but they don't put them on ebay
[23:29:59] <MattyMatt_> ssd
[23:30:38] <MattyMatt_> a couple of them at bargain prices would be nice
[23:31:43] <MattyMatt_> old thinkpads are so cheap with their tiny hdd. for the cost of one ssd I can get 3 or 4 mostly working thinkpads
[23:31:58] <andypugh> Beowulf Cluster
[23:32:21] <MattyMatt_> that's the long term plan, put all the ones with no screens into a microserver rack
[23:32:40] <andypugh> I keep seeing them in the skip at work.
[23:33:13] <MattyMatt_> you're not allowed to drag them out?
[23:33:22] <andypugh> Not really.
[23:33:46] <MattyMatt_> they are low rent machines if you don't care about the screens or keyboards
[23:33:54] <MattyMatt_> nice and quiet
[23:34:00] <andypugh> I risk it for really nice stuff, but getting them out through the door might be difficult and hard to explain
[23:34:49] <MattyMatt_> I assume the hdd get hammered before they even go in the skip
[23:35:48] <andypugh> Not that I have noticed.
[23:36:41] <andypugh> There is an industtial rackmount PC in there at the moment with two 16-channel analogue-input cards in it. But it got buried under a load of scrap wiring looms.
[23:37:29] <andypugh> Anyway, sleep.
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