#linuxcnc | Logs for 2013-02-20

[00:02:43] <AR_> which hole edges
[00:20:30] <tjtr33> where a hole chamfer would intersect the block edge chamfer, say a hole that was 1mm from block edge, but block already had a 1mm chamfer.
[00:20:31] <tjtr33> if i try to chamfer the hole, then (on my syste) FreeCad will dissappear ( blowed up real good).
[00:20:53] <AR_> oh
[00:20:54] <AR_> yeah
[00:20:55] <tjtr33> i can make that error repeat , so i dont do that now
[00:21:16] <AR_> lol
[00:21:21] <tjtr33> :)
[00:21:23] <tjtr33> gn8
[02:07:00] <DJ9DJ> moin
[02:37:10] <Loetmichel> mornin'
[02:56:20] <Jymmm> Yep it's 0043
[02:56:51] <Jymmm> Loetmichel: How ya doin for a Friday
[03:13:33] <Loetmichel> friday?
[03:13:45] <Loetmichel> do you hjave a time machine?
[03:13:58] <Loetmichel> its wenedsday over here
[03:14:24] <Jymmm> it's always friday in some parallel universe
[03:16:24] <Jymmm> ... and saturday, and sunday, and...
[03:18:09] <Jymmm> Kimchi NOT http://www.youtube.com/watch?v=lfJETqgWNK4&
[08:09:43] <TwisteR> hi all!
[08:10:08] <TwisteR> any Gentoo users out there?
[08:11:50] <TwisteR> I need some tips on proper combination of kernel version & RTAI CVS revision
[08:13:05] <TwisteR> as porting RTAI to 3.x in process right now and I can't build it at the moment
[08:21:53] <TwisteR> asdfasd, cleaning up your keyboard? :)
[10:02:59] <r00t4rd3d> http://drillbitsunlimited.com/
[10:03:13] <r00t4rd3d> Just use the promo code SAVEME20 in the coupon field at checkout.
[10:03:18] <r00t4rd3d> %20 off
[10:05:13] <r00t4rd3d> http://drillbitsunlimited.com/Carbide-Router-Bits-You-Choose-Size-and-Qty-P3046379.aspx
[10:05:19] <r00t4rd3d> those cut really good
[10:12:09] <ktchk> Linuxcnc control mirrors deflecting laser beam to engrave, any experience?
[10:30:21] <jensor> Axis 2 max velocity seems limited to programmed max velocity on axis 0.
[10:31:49] <tjtr33> ktchk: you'll have to search the archives, but there has been discussion of controlling galvos for lasers
[10:33:30] <ktchk> tjtr33: thanks
[10:35:08] <TwisteR> Some tips on proper combination of kernel version & RTAI CVS revision? I want to install LinuxCNC on my gentoo notebook following that guide on the wiki.
[10:43:10] <archivist> TwisteR, notebooks/laptops are probably a complete waste of your time
[10:44:04] <archivist> they have power management that stop proper realtime, they have poor latency
[10:47:21] <tjtr33> ktchk, a Hungarian man 'hg5bsd' created galvokins.c .
[10:47:28] <tjtr33> This kinematics corrected for some geometric error ( elliptical focus maybe ).
[10:47:31] <tjtr33> You may be able to contact him thru his youtube list.
[10:48:14] <TwisteR> archivist, even with all that power managenent stuff turned off in kernel?
[10:48:58] <TwisteR> my laptop is pretty old and has LPT
[10:49:36] <Jymmm> Even with all that APM turned off in the BIOS too.
[10:49:43] <cradek> TwisteR: before wasting lots of time, boot the linuxcnc live cd and run the latency tests
[10:50:18] <TwisteR> ok, thanks, I will try that
[10:50:19] <archivist> I am not sure I have seen a successful laptop yet in the n years I have lurked in here
[10:50:51] <cradek> I have one laptop that works fine, PIII processor, used it ca 2007 at the various emc fests
[10:51:02] <cradek> well I think I still have it somewhere...
[10:51:31] <archivist> 2007 is about when I started in here maybe
[10:51:46] * TwisteR Celeron M 1.60 GHz
[10:52:31] <archivist> veggy chip has built in power management hasnt it?
[10:53:11] <pcw_home> Speed Step
[10:59:38] <ktchk> tjtr33: I saw hg5bsd thanks
[10:59:51] <pcw_home> Oops Celeron M lacks speed step but has "Deeper Sleep"
[11:00:35] <Jymmm> You're getting sleepy, very sleepy...
[11:01:12] <jensor> Axis 2 max velocity seems limited to programmed max velocity on axis 0. What would cause this?
[11:02:16] <pcw_home> the TP will be limited by the slowest axis in a multi-axis move
[11:02:43] <ktchk> I am using a fujitsu lifebook c1321 laptop for linuxcnc. under ubuntu 10.04 emc2.51
[11:03:03] <pcw_home> (so it keeps to the programmed path)
[11:03:30] <jensor> If I do g0 z 4 it will not go at the max rate. This is a single axis move
[11:04:50] <pcw_home> z is axis 2?
[11:05:11] <jensor> yes
[11:05:23] <pcw_home> trivkins?
[11:05:42] <jensor> Don't know what you are asking
[11:06:48] <pcw_home> are you using some fancy kinematics?
[11:07:06] <jensor> not that i'm aware of
[11:07:28] <pcw_home> OK so no idea, I have not seen such an issue
[11:07:46] <jensor> 1BP.ini http://pastebin.com/1svqwYMp
[12:03:53] <IchGuckLive> hi all B)
[12:05:27] <jensor> Is there anyone here who could help resolve this problem.? Axis 2 max velocity is limited to programmed max velocity on axis 0.
[12:06:16] <IchGuckLive> in the ini the max is ?
[12:06:17] <Jymmm> jensor: pcw_home already told you.
[12:06:41] <Jymmm> jensor: you can't go higher than the lowest axis
[12:07:47] <jensor> axis 0 (x) axis is .9. Axis 1 (y) is .6. Axis 2 (Z) is 1.5
[12:08:05] <jensor> axis z will jog at 1.5
[12:08:32] <jensor> G0 z -4 moves at .9 (54ipm)
[12:09:21] <IchGuckLive> jensor: are you on 2.6 pre
[12:09:45] <jensor> what do you mean 2.6 pre?
[12:09:51] <IchGuckLive> the version
[12:10:03] <jensor> I'm using Axis 2.3.5
[12:10:17] <IchGuckLive> why dont you update
[12:10:39] <IchGuckLive> http://buildbot.linuxcnc.org/
[12:10:59] <jensor> not sure how to do that - It's been a while since I configured the setup
[12:11:23] <IchGuckLive> jensor: your home language is
[12:11:30] <jensor> english
[12:11:40] <IchGuckLive> im german
[12:11:53] <IchGuckLive> are you on 10.04
[12:12:46] <jensor> What do you mean by 10.04?
[12:13:00] <Jymmm> Ubuntu 10.04
[12:13:03] <IchGuckLive> cat /etc/*release
[12:13:14] <IchGuckLive> thype this in a terminal at the mashine pc
[12:13:19] <jensor> I'll check
[12:15:30] <IchGuckLive> @ all is the g-code manual also downloadable somewhere ? i fond nothing at the doco
[12:15:47] <jensor> It returns Ubuntu 6.06.1 LTS dapper
[12:15:48] <IchGuckLive> for a ofline mashie
[12:16:00] <IchGuckLive> jensor: this is so BAD
[12:16:13] <IchGuckLive> you realy need to do somthing
[12:16:36] <IchGuckLive> jensor: is it only a 3 axis
[12:16:46] <IchGuckLive> and only one mashine
[12:17:14] <jensor> yes a bridgeport mill
[12:17:36] <Loetmichel> IchGuckLive: why should he?
[12:17:49] <Loetmichel> never change a running machine
[12:17:50] <IchGuckLive> so save all you ngc needed and kill your PC with the latest Linuxcnc CD
[12:18:16] <IchGuckLive> Loetmichel: the interpreter is not getting this
[12:18:38] <Loetmichel> .. ok, dapper drake is six years old... COULD be goog to update, but first i would chek if the original setup works and the machine has genugh CPU and ram
[12:19:08] <jensor> Was thatba weakness that has since been cured?
[12:19:12] <Loetmichel> <- sots hins fingers
[12:19:20] <IchGuckLive> the 2.5+ will not run under dapper
[12:19:26] <Loetmichel> that is right
[12:19:56] <IchGuckLive> if he wants individuell speed he needs 2.5+
[12:20:14] <jensor> Will my ini and hal files etc still be compatible?
[12:20:22] <IchGuckLive> no
[12:20:43] <IchGuckLive> but you can print them out and get better performance by stepconf
[12:21:32] <IchGuckLive> way above 10m/min =350IPM
[12:21:53] <jensor> I never have been able to get the rti errors to zero
[12:22:07] <IchGuckLive> SMI
[12:22:09] <Tom_itx> JT-Shop-2, you gettin any weather yet?
[12:22:12] <jensor> maybe 1 or 2 every 24 hrs
[12:22:30] <IchGuckLive> it is only to you jensor
[12:22:58] <Jymmm> jensor: Are you using a laptop?
[12:23:05] <jensor> no
[12:23:18] <Jymmm> jensor: onboard video?
[12:23:51] <jensor> By the way if you were going to get another pc for this task to replace what would it be?
[12:24:07] <jensor> separate monitor
[12:24:34] <Jymmm> jensor: Not all mobo are the same, best to run the latency tests for 24+ hours from the LiveCD prior to installing
[12:24:55] <Jymmm> jensor: No are you using the onboard video, or a plugged in video card?
[12:24:56] <IchGuckLive> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Latency-Test
[12:25:07] <IchGuckLive> jensor: here is the list
[12:25:15] <jensor> I am willing to buy another mobo if I knew what to look for
[12:25:20] <jensor> video card
[12:26:49] <jensor> tnx for the list
[12:31:51] <IchGuckLive> NP http://wiki.linuxcnc.org/cgi-bin/wiki.pl?LinuxCNCKnowledgeBase to your help
[12:38:14] <wholepair> I am having a hard time finding a manual for this: http://www.flickr.com/photos/jeffreygarman/tags/msd021a1x/
[12:38:47] <wholepair> AC servo drive - can it be interfaced/used with linuxcnc
[12:39:25] <IchGuckLive> ofcause
[12:39:38] <Jymmm> For you non coffee snobs, this is pretty good http://www.myasianstore.com/products/126-owl-3-in-1-instant-coffee-mix.aspx Each packet makes 5oz of coffee with cream and sugar already mixed in. I've seen it locally for $3.99 for a 30ct bag.
[12:41:12] <Jymmm> I like it FAR BETTER than the Nestle one
[12:41:14] <IchGuckLive> wholepair: you got specific driver infos
[12:43:43] <IchGuckLive> wholepair: ? Mesa 5i25 7i77
[12:44:02] <wholepair> IchGuckLive: just the sticker on the side of the enclosure - panasonic AC Servo Drive - MSD021A1X
[12:44:17] <IchGuckLive> B)
[12:45:00] <wholepair> IchGuckLive: I don't have any Mesa hardware - would it work with that?
[12:45:18] <IchGuckLive> yes
[12:45:28] <IchGuckLive> is it a plasma ?
[12:49:40] <IchGuckLive> Parameters for Position Control , Speed Control Torque Control ...... so you are fine with that
[13:02:41] <mrsun_> anyone got experience with brazing/silver soldering etc? :)
[13:03:12] <IchGuckLive> i fond the docs -> http://linuxcnc.org/docs/devel/html/gcode/
[13:04:31] <IchGuckLive> mrsun_: ask Loetmichel he is the solder master
[13:07:52] <r00t4rd3d> I wonder how a Doodler would do on a cnc router
[13:08:30] <archivist> mrsun_, something you have to watch, not too hard but clean metal and the right flux
[13:08:52] <r00t4rd3d> mrsun_, Ive have silver solder before
[13:09:56] <mrsun_> well silver solder, very expensive .. brass "rod" for brazing quite cheap ... is there difference in how it flows etc? i guess the melting temp is alot lower on silver solder ?
[13:10:15] <mrsun_> and these flux covered rods, are they anything to have ?
[13:10:19] <archivist> spot the silver solder http://www.collection.archivist.info/archive/DJCPD/PD/2005/2005_09_19_M_Cooper_Clock/P9091739.JPG
[13:10:21] <r00t4rd3d> you need to get it hot but not as hot as brass
[13:11:10] <mrsun_> what kind of death machine is that?!
[13:11:36] <archivist> a clock, with modifications
[13:11:39] <mrsun_> i know ive brazed in the forge before and there it seems that brass flows realy well also into cracks etc but i guess the less temp the better :P
[13:12:01] <Jymmm> mrsun_: Chrono Death Ray Machine
[13:12:10] <r00t4rd3d> what do you need to solder"
[13:12:12] <r00t4rd3d> ?
[13:12:16] <archivist> you need enough for it to flow nicely
[13:12:58] <mrsun_> r00t4rd3d, steel to steel
[13:13:38] <Jymmm> archivist: ar about what temp does silver solder melt? I need to braize a leak in a brass container
[13:14:21] <Jymmm> archivist: and too many shiny things, where's the silver solder in that pic?
[13:14:24] <r00t4rd3d> ive use a normal soldering iron with it
[13:15:05] <Jymmm> it's a brass stove, so gets exposed to 1100F occasionally
[13:15:43] <archivist> the added brackets are built up on the clock
[13:15:43] <r00t4rd3d> silver solder wont work on that
[13:17:35] <mrsun_> work on what ?
[13:18:19] <Jymmm> 1240F melting point, 1355F flow point, maybe it might.
[13:19:43] <roycroft> jymmm: there are several silver solder alloys available, each with a different melting point
[13:19:50] <roycroft> that is how jewelers build up pieces
[13:20:04] <Jymmm> roycroft: So I see =) http://lists.contesting.com/pipermail/amps/2000-January/015467.html
[13:20:12] <roycroft> they start with the high-temp solder and work their way down to the low temp solder as they build their piece
[13:21:24] * roycroft took a jewerlymaking class a few years ago, with hopes of gaining new skills that can be applied to general metalworking/machining, and was not disappointed
[13:21:52] <Jymmm> I alwas wanted to learn silversmithing
[13:22:12] <pcw_home> 1100F seems pretty hot for brass
[13:22:36] <pcw_home> at the minimum its going to anneal it
[13:22:40] <roycroft> i've soldered lots of brass with silver solder
[13:22:50] <Jymmm> roycroft: cool
[13:22:58] <Jymmm> I'll have to give it a try
[13:23:08] <Jymmm> roycroft: what did you use for flux?
[13:23:09] <roycroft> i usually use "easy" solder, which is the lowest melting point alloy
[13:23:19] <roycroft> a borax paste
[13:23:31] <Jymmm> hmmm
[13:23:56] <roycroft> from a jeweler outfitter
[13:24:18] <roycroft> i usually order from otto frei, but i sometimes get supplies from rio grande
[13:24:20] <Jymmm> oh, not just borax soap + water and make into a paste?
[13:24:29] <roycroft> that would probably work fine
[13:24:36] <roycroft> experiment with some scrap brass
[13:24:49] <Jymmm> no scrap brass available =)
[13:25:15] <pcw_home> try some cartridges...
[13:25:16] <roycroft> i'm sure you can get a small piece of brass tubing from a hardware store
[13:25:43] <Jymmm> roycroft: I could, just dont want to waste it =)
[13:26:29] <roycroft> better to waste a piece of scrap than damage your production piece
[13:27:19] <archivist> cand always solder a bit more onto the broken production
[13:27:38] <Jymmm> I doubt I could do that, it just the tinest of vapor leaks I'd like to seal up.
[13:28:01] <Jymmm> It's a a trangia burner
[13:31:42] <Jymmm> There seems to be a vapor leak where it's been crimped sealed
[13:32:22] <Jymmm> hey jt
[13:32:32] <JT-Shop> Tom_itx: not yet
[13:32:40] <JT-Shop> hi jymmmmmmmmm
[13:32:47] <Jymmm> lol
[13:42:18] <cncbasher> JT-Shop: get my mail ok ?
[13:42:56] <JT-Shop> I just got back from a customer, let me check
[13:44:03] <Loetmichel> mrsun_: brass and Phosphoric copper solder are fpr high temp stuff which has to carry huge loads, silver solder is for lower temp solder joints which has to be a bit more sturdy than SnPb solder
[13:59:18] <Tom_itx> JT-Shop, probably about 4-5" so far
[13:59:53] <Tom_itx> the bulk of it is supposed to come tonight
[14:08:18] <JT-Shop> Tom_itx: our wx is due this evening
[14:08:47] <JT-Shop> cncbasher: thanks this one shows the adjustment screws too
[14:09:09] <JT-Shop> and it makes more sense to me now what he did with the circuit board
[14:09:39] <cncbasher> yea hope it helps
[14:10:55] <JT-Shop> yes, it should help me now I can compair notes on all of them
[14:24:50] <cradek> http://www.youtube.com/watch?v=DQWyhezIze4
[14:25:37] <cradek> "uses cutting-edge, patent-pending technology"
[14:25:40] * cradek makes a gesture
[14:26:06] * DJ9DJ cant breath any more
[14:26:31] <DJ9DJ> you are on the dark side! ;)
[15:05:38] <r00t4rd3d> http://www.liveleak.com/view?i=266_1361381024
[15:06:50] <tjb1> r00t4rd3d:
[15:11:46] <mrsun_> Loetmichel, hmm ok ... but ag 2, cu 91.8 p 6.2, that would be a phosphoric copper solder ... very cheap compared to ordenary silver solder .. is that good for soldering steel also ?
[15:12:27] <mrsun_> but has a tensil strenght of 250Nm compared to the silver solders 450 - 500Nm
[15:12:33] <mrsun_> according to the package
[15:19:22] <mrsun_> "not recommended for brazing steel"
[15:19:31] <mrsun_> or other ferrous materials
[15:19:32] <mrsun_> hmm
[15:32:05] <mrsun_> so to make it easy on you, i need to solder steel to steel, where one part is galvanized but the galvanized part will be turned down in the lathe, dont know if the zink penetrates the metal but i guess not? is there a problem to solder things that are galvanized? :) so what type of solder should i use for this application =)
[15:32:35] <Loetmichel> mrsun_: with the right flux: yes
[15:32:57] <Loetmichel> wothout Flux: no chance
[15:33:16] <cradek> usually attachments of steel to steel are done by welding...?
[15:33:29] <mrsun_> but says on a page i find that phosphorous alloys are not good with steel cause it makes brittle joints
[15:33:31] <Loetmichel> depends: silver solder is possible on zinc
[15:33:46] <Loetmichel> SnPb solder also
[15:34:21] <Loetmichel> but the phosporic copper solder isnt, the zinc will burn off before the solder gets liquid
[15:34:41] <Loetmichel> mrsun_: it does
[15:34:59] <Loetmichel> it makes the STEEL britte to a certain degree as far as i remember
[15:35:10] <mrsun_> Loetmichel, i do not care about if the zink is still intact in this application tho =)
[15:35:31] <Loetmichel> is that a high load soldering?
[15:35:44] <Loetmichel> what is the pourpose?
[15:35:50] <mrsun_> Loetmichel, not realy as things will be threaded before soldering also :P
[15:36:01] <mrsun_> Loetmichel, tilting machine feet .. not a very heavy machine either :P
[15:36:15] <Loetmichel> so its just to prevent the nut from turning on the thread?
[15:36:29] <mrsun_> kinda, but i like it when stuff hold together :P
[15:36:37] <mrsun_> there will be a ball attached to the end of the threaded rod also
[15:36:56] <mrsun_> and thats the part i want soldered insted of welded
[15:37:05] <Loetmichel> use silver solder in sparse amounts and flux generously
[15:37:05] <mrsun_> ofc i could weld it then turn the weld down :P
[15:37:35] <Loetmichel> i would screw the ball on
[15:37:43] <mrsun_> Loetmichel, yes but they all say silver solder ... even the ag-cu-p solder ... then there are different ones but they cost like 10x what this rod does :P
[15:37:56] <mrsun_> Loetmichel, yeah thats what i was thinking, then solder it to make a solid joint :P
[15:37:59] <Loetmichel> drill a hole in the ball, thread it and screw it on top of the foot
[15:38:16] <mrsun_> i dont want the ball to unscrew when adjusting =)
[15:39:27] <mrsun_> and i find it a good opertunity to learn how silver solder etc works =9
[15:39:28] <mrsun_> =)
[15:39:41] <Loetmichel> mrsun_: "silver solder" is something like this: http://shop.handwerkstadt-louis.de/artikel.php?artnr=4006062245102
[15:40:08] <Loetmichel> mrsun_: thats what green loctite is for ;-)
[15:40:18] <mrsun_> haha :P
[15:40:36] <mrsun_> loctite coasts like 5x what the highest grade brazing rod they have in town does
[15:41:14] <Loetmichel> mrsun_: but it is used a LOT less per joint, AND is undoable ;-)
[15:41:48] <mrsun_> and then you forget to put the cap on the bottle or soemthing
[15:41:51] <mrsun_> :P
[15:42:12] <Loetmichel> and you are not pressed to buy loctite, there is plenty of cheap "screw lock" on the market
[15:42:28] <Loetmichel> the cap wont hurt
[15:42:54] <Loetmichel> the screw locs harden with absence of air and presence of humidity and metal ions
[15:43:11] <Loetmichel> the stay liquid in the bottle more or less indefinetly
[15:43:50] <mrsun_> still good to learn to braze!
[15:43:54] <mrsun_> or solder or whatever =)
[15:44:02] <mrsun_> as it has alot more applications then just screw locking :P
[15:44:17] <Loetmichel> that is true
[15:45:21] <mrsun_> and in 99 out of 100 cases i always start in the wrong end, hardest first then go back to easier and easier ways :P
[15:51:17] <mrsun_> but a higher silver content solder without phosphor would be a better choice for steel to steel then ? :)
[16:03:02] <mrsun_> hmm i wonder if the south bend clones in sweden have the same kind of gear system as the south bends
[16:36:54] <Connor> On MESA I/O. If I want to switch a 24v relay. Do I source 24v to the relay and mesa sync ground, or ground the relay and the MESA provides 24v supply ?
[16:37:13] <Connor> I want to add a manual over switch to it too..
[16:44:22] <Connor> skunkworks: Hey. Question on MESA.
[16:44:49] <skunkworks> Connor: yes?
[16:44:52] <Connor> I want to switch on/off a relay using a field I/O. but, I also want a external button to do it..
[16:45:00] <Connor> what's the best way to wire it.
[16:45:36] <Connor> I know that the MESA card will source the 24v. can it handle a back current ? I.E. if the switch were to also source 24v to the relay..
[16:46:04] <Connor> I.E. External Switch and MESA in parallel so to speak ?
[16:47:19] <skunkworks> Connor: that would be a question for peter
[16:48:02] <skunkworks> I have only used the mesa with opto22 interface modules
[16:49:09] <Connor> The output driver chips used on the 7I77 have built in Zener diode clamps to clamp
[16:49:10] <Connor> inductive turn-off (fly-back) spikes. This means that flyback diodes are not normally
[16:49:10] <Connor> required on inductive loads. If high current inductive loads are switched at high
[16:49:10] <Connor> frequencies, they should have flyback diodes to limit power dissipation the in 7I77's driver
[16:49:10] <Connor> chips
[16:49:41] <Connor> Not sure that'll protect the output side from 24v input...
[16:51:02] <skunkworks> sounds to me like 24v relay should be fine
[16:51:29] <skunkworks> (I concider a relay as a small inductive load) ;)
[16:51:40] <Connor> that's not the issue. I'm just thinking if I put a switch on to by-pass the MESA card to supply 24v to the coil, it's going to send 24v to the output side of the MESA card..
[16:52:08] <Connor> so, a diode may be needed.
[16:52:27] <Connor> unless that Zener diode will protect it from more than just spikes..
[16:53:24] <skunkworks> I don't think I understand what you mean
[16:54:37] <DJ9DJ> gn8
[16:54:54] <tjtr33> Connor, read pcw's conversation here http://tom-itx.dyndns.org:81/~tom-itx/irc/logs/%23linuxcnc/2012-03-18.html especially the ssr drive stuff
[18:05:41] <Connor> tjtr33: Not sure that's relevant..
[18:32:10] <L84Supper> http://www.mesanet.com/graphics/parallel/7i77colo.png I can't see the part numbers clear enough
[18:48:59] <JT-Shop> pcw_home: what is the link to your sample 7i76 configuration files?
[18:56:02] <Tom_itx> JT-Shop, the first wave is on it's way to you
[18:56:08] <Tom_itx> the 2nd wave looks much worse
[18:56:47] <JT-Shop> yuck
[18:57:00] <Tom_itx> it was clear for a while here
[18:57:43] <Tom_itx> well we need the moisture but i'd rather it be rain
[18:57:55] <JT-Shop> not much on local radar
[18:58:40] <JT-Shop> still south of me
[18:59:13] * Jymmm grabs JT-Shop, grabs a keg, heads to Tom_itx to pee on his lawn.... How's that for moisture Tom_itx?
[18:59:21] <Tom_itx> http://www.intellicast.com/National/Radar/Current.aspx?region=jef
[18:59:24] <JT-Shop> lol
[18:59:29] <Tom_itx> Jymmm, the dogs take care of that part
[19:00:00] <Jymmm> Tom_itx: Hey can the dogs write their name like JT-Shop is doing?
[19:00:06] <JT-Shop> I can ony pee my name in the snow in morse code
[19:00:24] <Jymmm> Tom_itx: Do your dogs know morse code?
[19:00:30] <Valen> JT-Shop: you need a longer hose for better accuracy
[19:00:42] <JT-Shop> only onedog
[19:20:56] <PCW> JT-Shop: freeby.mesanet.com/5i26-7i76.ini (uses normal hm2-stepper.hal demo)
[19:21:28] <PCW> sorry: freeby.mesanet.com/5i25-7i76.ini
[19:31:23] <Connor> PCW What's the best way to wire up output from a I/O on 7i77 for a 24v relay so that both the MESA card can energize it, or a external switch can. I'm concerned about the switch sending 24v into the output of the MESA.
[19:33:41] <PCW> safest way would be with a diode in series with the 7I77 output (and flyback diode across relay)
[19:33:42] <PCW> that way the 7I77 never sees the 24V
[19:34:18] <Connor> okay, so, the fly back diode in the 7i77 isn't enough protection...
[19:35:52] <PCW> Its not that, its that you may damage the 7I77 if you apply 24V to an output when the 7I77 is unpowered
[19:36:05] <Connor> ok.
[19:36:29] <Connor> so, diode in series.. and one backwards across the coil unless using a SSR
[19:36:30] <Jymmm> PCW: WE WANT THE TONKA VERSION!!
[19:37:17] <PCW> It may be OK without but I dont know, you probably dont want to have to replace a NCP7608
[19:37:41] <Connor> better safe than sorry. :)
[19:37:59] <Connor> diodes are cheap.. and can be done in series with some heat shrink.. :)
[19:38:06] <Jymmm> PCW: 7i77T(onka)
[19:39:23] <Connor> Is there a way to do a "charge" pump setup with the mesa card since it has the watch dog timer ?
[19:40:00] <PCW> Not getting this Tonka thing...
[19:40:40] <PCW> Not sure what you mean about charge pump
[19:40:54] <Jymmm> PCW: Tonka toys, the trucks are INDESTRUCTIBLE
[19:41:26] <Jymmm> http://www.information-facts.com/wp-content/uploads/Tonka-Truck.jpg
[19:41:27] <Connor> Well. In case the PC goes nuts.. I want it to kill 24v signal I have going to a relay which is in series with my -Estop.
[19:41:44] <Jymmm> http://www.automopedia.org/wp-content/uploads/2009/01/newtonkadumptruck.gif
[19:42:10] <PCW> the 7I77 is pretty tough but we have blown up NCV 7608s with too large inductive loads (small step motors)
[19:43:45] <Connor> I.E. have a I/O that's linked to the machine On/Off. when toggle on, it provides 24v to my E-Stop chain.. complete with a latching relay. If it looses 24v.. It trips.. everything goes dead.
[19:43:48] <Jymmm> PCW: are stepper normally driven directly from the 7i77?
[19:43:54] <Jymmm> directly
[19:44:30] <Jymmm> Connor: are you using a Safety Relay?
[19:44:36] <Jymmm> a real one.
[19:44:38] <PCW> There are watchdogs in the FPGA and 7I77 (7I77 50 ms FPGA programmable)
[19:44:40] <PCW> that will disable all outputs if communications are lost
[19:44:51] <Connor> Jymmm: No. Not in this instance.
[19:46:07] <Connor> I never could get anyway to explain to me exactly what a safety relay did over a regular one. I this case.. I'm using a relay in a latching setup with a push-to-start button.. with E-Stop and limits in series.
[19:46:44] <PCW> watchdogs do not prevent situations where zombie real time threads keep the watchdogs happy however
[19:46:44] <Connor> If I can use 24v sourced from the Mesa, then.. if the PC goes crazzy.. Mesa cuts the 24v.. so, acts like a charge pump.
[19:47:27] <Connor> PCW So, not a real substitute for a real charge pump.
[19:47:52] <PCW> well a charge pump suffers the same limitation
[19:48:53] <Connor> That sound like a limitation for the whole concept then.. nothing I can fix.. E-Stop, limits and charge pump is about as good as one can do..
[19:51:13] <skunkworks> I had the computer hd start going bad - causing the computer to pause - the mesa watchdog bit
[19:52:34] <PCW> Is there a LinuxCNC watchdog for hal lost comms with rest of LinuxCNC?
[20:00:01] <skunkworks> I don't know the guts very well
[20:22:14] <skunkworks> it is quite unnerving when the k&t goes into estop out of the blue
[20:54:52] <skunkworks> who needs servos!
[20:54:54] <skunkworks> http://www.automationtechnologiesinc.com/products-page/nema34-closed-loop-stepper-motor-system-hybrid-servo-kit
[21:35:09] <PCW> (that is a servo)
[21:37:28] <Valen> just joined the # and saw that, I don't know why but i read it in the "THIS IS SPARTA!" voice "THIS IS SERVO!"
[21:37:42] <Valen> shouldnt you be sleeping PCW?
[21:38:25] <PCW> Probably its only 7:30 PM but I'm old...
[21:44:02] <Valen> should you at least be pcw_home then?
[21:44:32] * Valen is amused by the thaught of making PCWs home computer go *ding* and startling some cats or something ;->
[21:46:18] <roycroft> wow, somebody here who is in my timezone
[23:42:58] <tjb1> Are we still dinging cats here? PCW
[23:43:12] <tjb1> pcw_home: