#emc-devel | Logs for 2009-01-18

[04:59:25] <jmkasunich> what are the chances that the 5i23 driver is actually "faulty" (as Donnie Timmons thinks)
[04:59:52] <SWPLinux> did he respond to Seb?
[05:00:08] <SWPLinux> (about the stepgen that was taking up some of his I/Os)
[05:00:24] <jmkasunich> I don't think so
[05:00:35] <SWPLinux> ok. that sounds like a good explanation to me :)
[05:04:45] <SWPLinux> oh. I just saw Donnie's latest email
[05:04:52] <jmkasunich> I just replied
[05:04:59] <SWPLinux> ok
[07:30:05] <CIA-40> EMC: 03cmorley 07TRUNK * 10emc2/src/hal/classicladder/spy_vars_gtk.c: Add float text to interger variable window
[10:31:44] <The_Ball> jmkasunich, hope he is wrong, cause I just bought one ;)
[13:22:03] <christel> [Global Notice] Hi all, As some of you may have noticed, we lost our ipv6 servers for a extended period of time in the last day. I am terribly sorry about this, it would appear that we've unmasked yet another peculiar hyperion bug. They're back up now and we shouldn't experience any further problems. Thank you for using freenode and have a great day.
[14:43:46] <alex_joni> pretty quiet today
[14:44:16] <alex_joni> BigJohnT: there were a couple minor nitpicks around the manual pdf's
[14:44:47] <alex_joni> maybe you can check if I missed any too large images (you need to set them to 80 page% size, then they turn up right in the pdf's)
[14:45:37] <alex_joni> * alex_joni packs
[14:45:59] <skunkworks> traveling again?
[14:46:36] <alex_joni> skunkworks: yeah, one week
[14:47:01] <skunkworks> fun or work?
[14:47:04] <alex_joni> skunkworks: I rely on internets though, so it should be ok
[14:47:05] <skunkworks> both?
[14:47:12] <alex_joni> work.. hopefully fun work :D
[14:47:17] <skunkworks> heh :)
[14:47:30] <alex_joni> basicly training and some tweaking
[14:53:21] <BigJohnT> OK alex_joni
[14:54:12] <BigJohnT> I try and set them to 70-80% unless they are real small
[14:54:30] <alex_joni> I mean the oversized ones
[14:54:35] <alex_joni> smaller ones can stay smaller
[14:55:08] <alex_joni> also, talk to jeff to put a link to the Getting started pdf here: http://linuxcnc.org/docview/devel/
[14:55:29] <alex_joni> and here: http://www.linuxcnc.org/docview/2.2/
[14:56:06] <BigJohnT> Is that something I can do?
[14:57:26] <alex_joni> I doubt it
[14:57:32] <BigJohnT> ok
[15:02:27] <alex_joni> seems I can
[15:02:46] <alex_joni> n/m, I fixed it..
[15:03:18] <BigJohnT> ok, did you see my e-mail on the synaptic package manager?
[15:03:25] <alex_joni> yup
[15:03:34] <alex_joni> gotta run to the trainstation though ;)
[15:03:48] <BigJohnT> ok have a safe trip
[15:04:37] <alex_joni> thanks, bye
[15:51:54] <alex_mobile> Hi all
[15:59:38] <BigJohnT> alex on the road
[16:02:58] <alex_mobile> On the train :)
[16:05:20] <BigJohnT> you must live near the train station...
[16:06:04] <BigJohnT> * BigJohnT wanders off to stir the fire
[16:10:11] <alex_mobile> About 2 minutes with the car. Maybe 15 by foot.
[16:18:10] <BigJohnT> that's too close :)
[16:19:31] <BigJohnT> dang I'm tired today :(
[16:21:46] <BigJohnT> oh boy it compiled and ran :)
[16:22:04] <alex_mobile> I used to live about 50m from the tracks.
[16:24:50] <BigJohnT> that is way to close
[16:25:47] <alex_mobile> It's ok, you don't hear trains after a while.
[16:26:45] <BigJohnT> I know I used to sleep between 16 cylinder engines that were 25' long and 12' high running 900 rpm :)
[16:27:00] <BigJohnT> 945 cubic inch per cylinder!
[16:27:15] <BigJohnT> turbo charged
[16:31:16] <skunkworks_> we have 2 tracks 1 block away from the house. :)
[16:31:27] <skunkworks_> you don't notice it after a week or so.
[16:33:30] <alex_mobile> The only thing that took longer to get used to, was that there was a signal nearby. And the trains used to blow their horn
[16:38:19] <jmkasunich> BigJohnT: marine engines?
[16:44:29] <BigJohnT> yep jmkasunich
[16:44:38] <jmkasunich> civilian or Navy?
[16:44:44] <BigJohnT> oil field
[16:44:48] <jmkasunich> ah
[16:44:54] <BigJohnT> EMC generators
[16:44:56] <BigJohnT> EMD
[16:45:04] <jmkasunich> EMD?
[16:45:05] <BigJohnT> got EMC on the brain :)
[16:46:18] <jmkasunich> what is EMD?
[16:46:19] <BigJohnT> most rigs I worked on had 3 16 cyl and 1 8 cyl standby
[16:46:37] <BigJohnT> Electro Motive Division... Train motors
[16:46:44] <jmkasunich> I see
[16:47:07] <BigJohnT> the first oil rigs used submarine motors for power
[16:47:09] <jmkasunich> you say "rigs", but earlier you said yep when I asked about marine
[16:47:26] <jmkasunich> these are on land, on an offshore platform, or on a ship?
[16:47:49] <BigJohnT> offshore jackup rigs mostly
[16:47:53] <jmkasunich> oh, ok
[16:48:08] <jmkasunich> to me, marine means there is a prop on the end of the shaft ;-)
[16:48:18] <jmkasunich> directly or indirectly (subs)
[16:48:20] <BigJohnT> we had to be pulled
[16:51:37] <BigJohnT> http://www.tugboatenthusiastsociety.org/Images/Photos-Machinery/EMD-ENGINE-645-CUTAWAY-500PIX.jpg
[16:52:08] <BigJohnT> the man holes in the oil pan are large enough to crawl through if your thin
[16:52:38] <jmkasunich> heh
[16:53:04] <jmkasunich> I've seen pics of some huge direct drive (slow) marine engines under construction in japan
[16:53:16] <jmkasunich> 3' diameter crankshaft journals, etc
[16:53:42] <BigJohnT> that's some big iron
[16:54:52] <BigJohnT> http://www.deepwater.com/_filelib/ImageGallery/RTF/AdriaticIX/AdriaticIX_1.JPG
[16:55:01] <BigJohnT> this is close to what I worked on
[16:55:49] <jmkasunich> gulf of mexico?
[16:56:18] <archivist> Ive seen some big iron engine pics, I would love to see some up close
[16:56:23] <BigJohnT> some and 3 years on the west coast of Africa up and down near the middle
[16:57:07] <BigJohnT> zaire, angola... some lovely places
[16:57:15] <jmkasunich> lovely
[16:57:28] <jmkasunich> only place nicer these days is the east coast
[16:57:55] <BigJohnT> never been there... don't want to go back either
[16:58:04] <jmkasunich> heh
[16:58:14] <jmkasunich> my stepson is in the Navy, on a destroyer
[16:58:34] <jmkasunich> deployed right now, they don't say where, but I think they might be chasing pirates in that area
[16:59:06] <jmkasunich> found it: http://people.bath.ac.uk/ccsshb/12cyl/
[17:00:16] <jmkasunich> I love the built in ladders in the crankcase
[17:01:01] <archivist> yup seen that page, wonderful
[17:01:21] <BigJohnT> now that is huge!
[17:01:40] <archivist> BIG boys toy
[17:01:56] <jmkasunich> I wanna see the lathe that turned that crankshaft
[17:02:30] <archivist> I have stood on a vertical steam engine of that scale
[17:04:06] <BigJohnT> I worked in a shipyard for a while building destroyers and the device they used to cut the mounts for the guns and rocket launchers looked like a rube goldberg device
[17:04:28] <archivist> http://www.kemptonsteam.org/kempton-index.html similar scale
[17:04:41] <BigJohnT> they had to cut about 16' diameter rings after the compartment was welded out on 3 decks
[17:05:06] <jmkasunich> kind of hard to put the ship on a mill table
[17:05:11] <archivist> they used the building for the goldfinger film iirc
[17:06:36] <BigJohnT> yea, it was made up of beams and bearings then welded to the compartment. It had a star wheel on the end that would hit a welding rod that would move the cutter bit a little on the beam
[17:06:58] <BigJohnT> It more or less had to be built in place
[17:07:18] <jmkasunich> archivist: if I ever come to England, I'm not gonna bother with the changing of the guard and all the other tourist stuff - I'll be visiting old engine museums
[17:07:32] <archivist> we have a few
[17:07:37] <jmkasunich> I think the UK has preserved more of that era than the rest of the world combined
[17:07:48] <archivist> probably yes
[17:09:08] <BigJohnT> we have a fall festival near here where they bring out a steam tractor and a threashing and bailing machine among other things
[17:09:57] <archivist> the event gets called a "steam rally" here
[17:11:23] <BigJohnT> this is a harvest festival so it has all kinds of things besides the steam stuff
[17:11:35] <BigJohnT> ./me goes to stir the fire
[17:12:07] <archivist> * archivist stirs fleabay
[17:12:34] <jmkasunich> wow - the engines at that museum weigh 800 tons each
[17:12:56] <jmkasunich> the turbines that came along 10 years later and pump the same amount of water weigh 25 tons
[17:13:41] <archivist> it is an impressive site, standing on one at the top looking at the other
[17:14:12] <archivist> I have not been down since they got it working again
[17:24:55] <jmkasunich> time to clear snow I think
[17:27:25] <jtr> We have a thresher's reunion every year around July 4th. They have several permanent exhibits. I see they got the old cotton press together.
[17:27:37] <jtr> http://www.threshers.com/farmpark/images/seotr_cottonpress.jpg
[17:28:43] <jtr> They were building a lineshaft machine shop when I last went - don't know how far along they are.
[17:53:00] <BigJohnT> that is huge jtr
[18:15:57] <BigJohnT> why does this not increment? *(haldata->delay_count)++;
[18:22:53] <jepler_> BigJohnT: because the order of operations in C++ means that the ++ operation is applied to the pointer, not the pointed-at data
[18:23:13] <jepler_> it's like asing why 10/3-1 doesn't divide by 2
[18:24:45] <jepler_> one way to fix it is to write (*(haldata->delay_count))++;, another would be to write *haldata->delay_count += 1
[18:24:58] <jepler_> the first is like writing 10/(3-1) to get the desired order
[18:25:02] <BigJohnT> thanks jepler_
[18:25:58] <BigJohnT> I knew I had to be missing something simple :)
[18:26:46] <jepler_> jepler_ is now known as jepler
[18:26:51] <jepler> oops how'd I get that _
[18:26:55] <jepler> nasty little character
[18:40:00] <jtr> BigJohnT: they've got a one-cylinder diesel running a veneer lathe. You know when you're getting close because the ground shakes. Thud, wait, thud...
[19:18:14] <jepler> cradek: I finally made it work with a ternary operator!
[19:18:15] <jepler> typedef int (F::*fp)();
[19:18:15] <jepler> return (this->*(x?(fp)&F::f:(fp)&F::g))();
[19:18:22] <jepler> now isn't that better
[19:28:31] <alex_mobile> Lol
[19:33:32] <cradek> jepler: I used that construct elsewhere, where f and g aren't in the class. I'll eventually have to add them to use ERF/ERS, so it'll break then
[22:04:39] <jmkasunich> I hope i never have to read that code
[22:31:02] <jepler> jmkasunich: you mean the C++ I pasted above? I agree.