#emc | Logs for 2010-11-24

[00:38:16] <ChanServ> [#emc] "This is the #emc channel - talk related to the Enhanced Machine Controller and general machining. Website: http://www.linuxcnc.org/, wiki at http://wiki.linuxcnc.org/"
[00:42:53] <JT-Hardinge> don't you just love the phrase "like Mack 3"
[00:47:42] <Valen> JT-Hardinge: dont forget to dose em up on coke and lollies before the trip back
[00:48:14] <andypugh> especially the red ones.
[00:49:08] <atmega> Hey kids, want to try some Red Bull?
[00:49:22] <Valen> w000000t lol
[00:49:40] <Valen> If i were a kid I wouldnt drink the stuff
[00:49:43] <Valen> tastes like crap
[00:51:10] <andypugh> It's good with Vodka
[00:51:41] <andypugh> OK, better to say it's _effective_ with Vodka.
[00:51:53] <JT-Hardinge> say goodnight Gracie
[01:13:36] <Dave911> The US Government has declared a bunch of high caffeine - high % alcohol drinks dangerous...
[01:31:42] <andypugh> OK, I really should know better than to stay up documenting untested software on a work night.
[02:15:36] <Jymmm> jthornton: It is, but I don't need that much power/noise ans thought I might be able to reduce it by doing the lower voltage thing.
[04:05:41] <Valen> * Valen needs a spindle
[04:05:52] <Valen> ~2.2-3Kw or so
[04:05:56] <Valen> not heaps of speed
[05:35:53] <elmo40> would compiling a real time kernel for every day use be worth it?
[05:37:53] <celeron55> if the alternative is an ubuntu binary real time kernel, probably not
[05:38:15] <celeron55> unless you need something that is not in there
[05:38:35] <elmo40> just wondering.
[05:38:42] <elmo40> is there a down side to a real time kernel?
[05:44:41] <elmo40> I hear multimedia distros run low-latency kernels. jackaudio.org uses one, I believe.
[05:45:25] <elmo40> err... not what I meant ;)
[05:45:31] <celeron55> there are actually a few realtime frameworks for the linux kernel i think
[05:53:31] <elmo40> Jacklab was what I meant to type.
[05:53:43] <elmo40> but it is no longer... :(
[09:04:44] <Bonny1> test
[09:04:44] <the_wench> fail Bonny1
[09:05:31] <Bonny> Fail?
[09:06:13] <Bonny1> Seems working for me :D
[10:04:18] <Bonny1> Hello... Someone know how to easyest solve move like 'G0 X[x-5]'
[10:04:37] <Bonny1> .. without to goes in incremental mode
[10:05:38] <Bonny1> is there some variable storring curent x and y?
[10:06:36] <archivist> I sometimes set up a variable just for the purpose, but often far simpler to change mode move and change back
[10:07:11] <Bonny1> As I know that doesn't work with G92
[10:07:52] <Bonny1> I just seeking how to introduce offset for all when I turnon the camera and want to have correct coordinates.
[10:10:19] <Bonny1> seems that the only way is to store with G28.1 or G30.1
[15:06:43] <skunkworks> TGIF!
[15:57:58] <jthornton> Saturday here and the kids and grandkids are on the way over to grandpa's house
[15:58:20] <skunkworks> Nice!
[16:01:04] <jthornton> yea, I need to go shut down the shop so we can play
[16:09:39] <Dave911> Sounds like fun!
[16:10:15] <elmo40> I can use any of these for an Axis encoder? http://www.industrialencoder.ca/products.php?id=26&PHPSESSID=da0b0c3c8ea1ddce8f7a876e2e96edfa
[16:10:22] <elmo40> they are Absolute encoders
[16:13:17] <skunkworks> not at this time
[16:13:46] <cradek> your best bet would be to send one to SWPadnos and hope for the best. he seems interested in doing that lately.
[16:15:05] <skunkworks> cradek: the video you just posted - Did you just make that>
[16:15:07] <skunkworks> >+
[16:15:10] <skunkworks> ?
[16:15:14] <skunkworks> there
[16:15:16] <cradek> which one?
[16:15:21] <cradek> umm are you ok? :-)
[16:15:55] <skunkworks> heh - the max milling the inside thread
[16:18:07] <cradek> yes just the other day
[16:19:23] <cradek> sunday I think
[16:20:01] <cradek> it actually works pretty well...
[16:21:21] <elmo40> only incremental encoders are supported, eh? I can work with that. They are usually less expensive anyways ;)
[16:22:02] <cradek> I don't know of existing drivers that work with any absolute encoders
[16:22:27] <cradek> people just use homing with switch and index pulse - you are right they're sure cheaper
[16:53:16] <Jymmm> ehats the imperial unit for 'lpm', gph?
[16:53:22] <Jymmm> whats the imperial unit for 'lpm', gph?
[16:53:53] <Bonn1> Hello... Need help! How to move machine for some value but to keep DRO coordinates same. I was playing with G92 but without success.
[16:54:20] <cradek> explain what you are trying to do
[16:55:36] <Bonn1> I had cam fixed in spindle with y+63 offset. When I turn cam I want to all coordinate reffer to camera crosshair instead tool.
[16:56:02] <cradek> use a tool offset of Y+63 ?
[16:56:13] <cpresser_> use tool-offset?
[16:56:43] <Bonn1> With cam I just want to set tool offset for new one.
[16:57:02] <Bonn1> So I think that G92 offset can be better
[16:57:25] <Bonn1> just didn't find solution.
[16:57:43] <cradek> I don't understand what you mean
[16:58:32] <Bonn1> Let's see like example to be clear. (my english isnt so good)
[16:58:50] <Bonn1> The example is nonsense but just to clear.
[16:59:01] <Bonn1> I do g0 x10 y10
[16:59:16] <Bonn1> then g1 z-10
[16:59:25] <Bonn1> g1 z10
[16:59:40] <Bonn1> now I have hole for example at x10 y10
[17:00:22] <Bonn1> Now I turn on the camera and wan't to move machine for (known camera offset) but want to read on DRO stil x10 y10
[17:00:37] <Bonn1> and to se hole just under the cam.
[17:01:08] <Bonn1> Is that understandable?
[17:01:58] <cradek> yes, load a tool offset
[17:02:21] <Bonn1> I think is easy if I get something like g92 x[x+63] to work. But that simply doesn't work
[17:02:35] <cradek> g43 h[camera tool number]
[17:02:38] <cradek> g0 x10 y10
[17:02:41] <cradek> hole is under camera
[17:02:46] <cradek> brb
[17:02:50] <Bonn1> I try with g30.1 to save position but is in machine coordinate so doesn't work too.
[17:12:07] <Bonn1> cradek ok that's work. But what about some shortcut. the g0 x10 y10 is simple but in real the number is longer and don't want to make some typo.
[17:14:24] <cradek> you want to move the feature that's currently under the spindle to under the camera?
[17:14:40] <Bonn1> yes
[17:14:44] <Bonn1> and back too
[17:14:51] <cradek> g91 g0 x63
[17:15:02] <cradek> g91 g0 x-63
[17:15:45] <Bonn1> that change DRO
[17:16:01] <cradek> g43 h[camera] g91 g0 x-63
[17:16:36] <cradek> g43 h[camera] g91 g0 x63
[17:16:40] <cradek> g49 g91 g0 x-63
[17:21:50] <dimas> i'm getting - command (EMC_AXIS_HOME) cannot be executed until the machine is out of E-stop and turned on
[17:22:27] <dimas> when trying to do homing on X axis
[17:22:55] <cradek> is the machine out of estop and turned on?
[17:23:50] <dimas> what is estop? emergency stop switch?
[17:23:53] <elmo40> F2, I believe
[17:24:03] <elmo40> or F1
[17:24:10] <elmo40> :P press both, lol
[17:24:12] <dimas> trying
[17:24:44] <elmo40> there are two red button at the top left. one is power and the other is eStop.
[17:24:52] <dimas> same keys in tkEMC?
[17:25:05] <elmo40> idk
[17:25:15] <cradek> http://www.linuxcnc.org/docs/devel/html/gui_axis.html#r1_2
[17:25:29] <dimas> thanks will read
[17:25:51] <cradek> 'a typical session' is not very detailed but it has the steps you need
[17:27:14] <skunkworks> cradek: have you used your 4th axis on the jr yet?
[17:27:34] <cradek> nope...
[17:27:36] <Jymmm> cradek: have you used your 5th axis on the jr yet?
[17:29:42] <Jymmm> cradek: your video showed 5 axis
[17:31:16] <cradek> Jymmm: jr is my big machine - the 5 axis is a desktop size play machine
[17:32:01] <Bonn1> cradek thanks seems taht works
[17:32:13] <Jymmm> cradek: oh
[17:52:51] <dimas> error gone, it does not seek home yet
[18:06:54] <dimas> seeking..
[18:09:03] <dimas> too slow moving..
[18:17:11] <cpresser_> is there going to be a emc-fest in 2011?
[18:17:36] <cpresser_> I am about to plan my holydays :)
[18:30:18] <IchGuckLive> Good Evening from Germany
[18:44:59] <IchGuckLive> temperature now Below Zero Here
[18:46:48] <Defhammer> hello I just installed ubuntu 10.04 followed with EMC2.4.5 and I have this error message: http://pastebin.com/QqMsUEEC
[18:48:15] <Defhammer> I checked limits.conf and it does contain the line * - memlock 20480
[18:48:44] <elmo40> you installed the 10.04 from linuxcnc.org?
[18:48:52] <Defhammer> no
[18:49:08] <elmo40> so you compiled your own RTAI kernel?
[18:49:27] <Bonny> seems no RTAI at all.
[18:49:45] <Defhammer> i ran the sh script
[18:51:36] <elmo40> didn't want to use the .iso from the website?
[18:51:52] <Defhammer> tried running it but it failed
[18:52:18] <Defhammer> in fact it seems the computer i am using hates ubuntu live cds
[18:52:25] <elmo40> excellent :)
[18:52:50] <IchGuckLive> Defhammer: dont use the Livecd install from running livecd
[18:53:15] <IchGuckLive> install from the first picture not from running livecd distr
[18:53:32] <Defhammer> ok
[18:53:38] <Defhammer> but
[18:53:54] <IchGuckLive> problem is that APOD NOLAPIC NOApic cand be issued to GRUB as they run already
[18:54:32] <Defhammer> i used the ubuntu alternatve install to get the system running through a different computer
[18:54:40] <Defhammer> to switched HD
[18:54:53] <Defhammer> then switched HD
[18:55:27] <IchGuckLive> you shoudt install it on the system it is soposed to work with
[18:55:40] <IchGuckLive> whats the problem low RAM ?
[18:55:47] <Defhammer> no
[18:55:54] <Defhammer> it's got 512MD
[18:56:06] <IchGuckLive> thats enoph
[18:56:30] <Defhammer> it would seem the BIOS is not liking the install process
[18:56:52] <IchGuckLive> so press F& at the start and switch on all OFFS it iss showung You Nolapic Noapic ...
[18:57:52] <IchGuckLive> F6
[18:58:40] <Defhammer> I can try it, but the thing is the livecd will run on the computer it just fails during the install process
[18:58:53] <IchGuckLive> you dont need this fine power issues as you on a RTI
[18:59:51] <Defhammer> ok I will do the no apic option and see if that works
[19:00:38] <Defhammer> I will try to reinstall the OS using iso from linuxcnc.org
[19:01:25] <Defhammer> I will be back in a bit
[19:02:09] <IchGuckLive> B)
[19:06:37] <IchGuckLive> by till tomorrow
[22:04:31] <Jymmm> If you have a 4" hose and need to filter the air, how much surface area do you need to not impend the airflow too significantly?
[22:05:02] <Jymmm> Well, the intake for the filter is 4", the medium is carbon pellets.
[22:29:11] <kb8wmc> good evening all
[23:17:58] <Valen> didn't think carbon would do much with air
[23:18:11] <Valen> would also depend on how much air your pushing through it Jymmm
[23:19:16] <Valen> any advice on spindles?
[23:19:29] <Valen> we need around 16000RPM or so
[23:19:33] <Valen> and around 2-3Kw
[23:20:11] <Valen> but we would also like to be able to do lower speed stuff
[23:21:07] <Valen> I hear those chinese ones aren't much chop for actually cutting metal
[23:48:20] <ries> Valen: I hear that usually it's the ball bearings that are cheap... there rest is just ok.. Electronics are sometimes flacky...
[23:49:08] <Valen> I'm worried if we got one we wouldn't be able to upgrade the bearings to something big enough for metalworking duty
[23:50:30] <ries> Valen: for the money you can always try :) But indeed... might not be good for metal... at least not teh ocne I see for 400USD on ebay
[23:50:49] <Valen> thats what I was looking at
[23:51:17] <Valen> if they didnt say "please dont cut metal for long times" in the ads it'd be a good start lol
[23:51:53] <ries> hehehe... I know people buy them for woodworking with reasonable good success
[23:52:03] <ries> I don't do metal working, so I am not sure what the reviews are
[23:54:05] <Valen> * Valen wants to cut stainless