#emc | Logs for 2009-05-09

[00:29:04] <skunkworks405> http://imagebin.ca/img/LYMIjWP.jpg
[00:31:24] <mshaver> 24x48? 20x40?
[00:32:04] <skunkworks405> 26X48
[00:32:22] <skunkworks405> or 48X26
[00:32:25] <skunkworks405> ;)
[00:32:29] <skunkworks405> damn rain
[00:33:11] <skunkworks405> biab
[12:23:45] <archivist> pjm_, re collett holder ...make
[12:24:10] <pjm_> hello
[12:24:20] <pjm_> yeah i'm probably heading towards that to be honest
[12:24:31] <pjm_> i cant find any straight shank holders for them
[12:24:54] <pjm_> only QC40 is it? the big quick change tooling from bridgeport CNC's
[12:26:08] <archivist> dunno all the modern stuff unless I look in the catalogues...then I get upset.... I want.....
[12:26:58] <archivist> I got another dividing head yesterday just contemplating 5th axis
[12:30:08] <archivist> pjm_, ot look at the tormach tooling see if the idea can the adapted
[12:33:00] <pjm_> actually its a good idea to try to find a 'near enough' holder and get it turned out
[12:33:55] <archivist> tool post grinder if its near enough
[12:45:38] <tomp> tomp is now known as tomp3
[13:08:39] <tomp3> someone here was setting up solar power, maybe of interest http://freshmeat.net/projects/solarcalc-22
[13:24:31] <tomp3> hah, a 'blisk' is the impeller like blade disk in a turbine. heres 5 axis demo of it being milled (include stock removal and machine sim )
[13:29:22] <tomp3> http://www.youtube.com/watch?v=7SXyb3S4ky8
[13:31:55] <archivist> was talking to an ex Delcam worker yesterday
[13:35:55] <tomp3> someone scored delcam & ug nx5 in thailand a couple months ago ;)
[13:36:14] <tomp3> 6
[13:37:20] <archivist> Delcam had/has 200 ish programmers... no wonder it costs!
[13:37:51] <tomp3> the way 'step' works with such a blisk is shown here http://www.youtube.com/watch?v=S5DwlsGxwks
[13:38:52] <tomp3> i think im starting to see how the same data is used by other machines.. metal removal, surface treatment & inspection machines.
[13:39:46] <tomp3> of course i came across your worm gear vid too. you make custom disk cutters for that?
[13:42:34] <archivist> that was a standard form that happened to fit the job but I make cutters for jobs
[13:49:06] <archivist> it was interesting in that the way I write gcode, the standard cam progs dont think that way (they expect a solid model) I would have to got to APT etc
[13:50:46] <tomp3> in this 'step-nc' solution for blisks, the hurdle is to find a toolpath and avoid collisions.
[13:50:51] <tomp3>  several machine used the same step data but required wildly different setups to avoid ....
[13:50:57] <tomp3> corner of Z ram colliding with tilted B table clamp etc.
[13:51:02] <tomp3> so an effort to build 'collision prediction' into cad begins, and, modeling machine tool and kins too. cool!
[13:52:02] <tomp3> I like APT a lot, but you generate the surface to drive the tool across, thats pretty much a 'solid model'
[13:52:18] <tomp3> no complaints, APT is very vey cool
[13:53:13] <tomp3> oops laundry room run, bbl
[17:28:52] <tomp> tomp is now known as tomp3
[19:41:48] <BigJohnT_> BigJohnT_ is now known as BigJohnT
[20:27:10] <alex_joni> good night all
[20:29:39] <JymmmEMC> G'Night John Boy
[20:32:26] <SWPadnos> G'night Mary Ellen
[20:33:23] <andypugh> So, what is a reasonable time of night to stop CNC machining? My lathe is facing down a square block of cast iron downstairs. I am monitoring progress aurally, and I assume the neighbours are too.
[20:33:28] <JymmmEMC> SWPadnos: wanna see a cool lil toy?
[20:33:52] <SWPadnos> andypugh, if the police show up, it's too late
[20:34:02] <SWPadnos> JymmmEMC, uh - maybe ... :)
[20:34:52] <andypugh> Incidentally, G95 (cut per rev machining) looks to work in imperial on a metric lathe, or something...
[20:34:53] <anonimasu> andypugh: sounds fun :)
[20:35:18] <SWPadnos> it should work fine
[20:35:26] <SWPadnos> (unless there's a bug)
[20:35:31] <JymmmEMC> SWPadnos: http://dealextreme.com/details.dx/sku.20383
[20:35:37] <andypugh> Should I actually measure it to make sure?
[20:36:21] <SWPadnos> no, if it looks like inches then it's inches. the kind of error you could see (if there were bugs) would be more like getting mm when you expect inches
[20:36:38] <SWPadnos> JymmmEMC, I've seen something like that before
[20:36:48] <SWPadnos> in fact, I think Microsoft even makes one (strangely enough)
[20:37:02] <JymmmEMC> SWPadnos: for $40?
[20:37:17] <SWPadnos> oh, probably not
[20:37:22] <andypugh> Well, G95 F0.25 was advancing 6mm per rev. Of course I am not sure how well the rpms match demand, but then that shouldn't matter.
[20:38:17] <andypugh> Unless it is picking up on the wrong track of the spindle encoder.
[20:38:32] <JymmmEMC> SWPadnos: I figure for a Q&D headache free NAS, not too shabby
[20:40:05] <JymmmEMC> SWPadnos: it says it can do usb cameras too
[20:40:15] <JymmmEMC> *shrug*
[20:40:43] <JymmmEMC> might be cool if it you could use a usb hub with it
[20:41:54] <andypugh> Sorry about that, I managed to hit a duff key combo and close the browser
[20:43:03] <andypugh> What I was saying was... I am trying to use G28.1 to write the current position to #5221, #5222 and #5223. It seems to work on sim-lathe up here, but down on the real machine, it doesn't.
[20:43:58] <andypugh> Or does anyone know a better way to read the current axes?
[20:46:28] <andypugh> Hmm 9:45pm is probably time to stop disturbing the neighbours. Back shortly.
[20:52:38] <andypugh> OK, goodnight chaps
[20:52:49] <archivist> its early
[20:55:01] <tomp3> i needed a teeny vise and was looking at flytying vises... found a guy who used xacto knive handles,
[20:55:02] <tomp3> he used a die to thread the handle 5/16 to make his workholders.
[20:55:15] <tomp3> nice trick
[21:21:52] <WalterN> hey
[21:23:48] <eric_unterhausen> howdy
[21:24:23] <WalterN> sorry, busy scratching around the pox :(
[21:24:43] <WalterN> I hate these things
[21:25:31] <WalterN> anybody know of a commercially avaliable CNC machine that is based on *nix?
[21:25:54] <WalterN> for its imbedded operating system
[21:29:21] <eric_unterhausen> I'm sure there are a few, although DOS is probably more common
[21:30:52] <WalterN> I was at a machine tool trade show here in Portland Oregon last week before I got sick... seemed most of the controllers used windows XP
[21:31:24] <eric_unterhausen> hopefully just the user interface
[21:32:04] <WalterN> *shrug*
[21:32:44] <WalterN> hard to tell without talking to somebody that was involved with its creation
[21:33:01] <eric_unterhausen> there is a fairly strong commercial incentive to using XP
[21:33:38] <eric_unterhausen> there is a real-time variant of windows that works fairly well
[21:33:46] <archivist> I wonder how soon soon opensource creeps in
[21:33:47] <WalterN> I was thinking that if it was linux it might be easier to tweek
[21:34:17] <archivist> support is a nightmare if users tweak
[21:34:39] <WalterN> yeah
[21:35:06] <eric_unterhausen> it probably wouldn't be in the category of "tweak"
[21:53:13] <WalterN> is there any cam software around for linux?
[21:54:59] <archivist> not a lot but there is some
[21:56:10] <archivist> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Cam
[21:56:29] <WalterN> oOo...
[21:56:52] <archivist> coming along is heekscan and heekscnc but its early stages
[21:57:10] <archivist> heekscad
[21:58:13] <archivist> discussion of it is in #cam
[21:58:28] <WalterN> ok
[22:05:11] <WalterN> nice
[23:29:37] <DanielFalck> WalterN: are you around Portland?
[23:38:14] <eric_unterhause1> DanielFalck: I finally bought a torch, might make some frames soon
[23:39:03] <DanielFalck> eric_unterhause1: great