#linuxcnc | Logs for 2014-01-07

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[01:22:13] <andypugh> Goodnight chaps
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[05:17:51] <Tecan> http://www.pastebin.ca/2530807
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[05:55:44] <Jymmm> I have a 5gal plastic gas can, but it's missing a vent hole.How can I make one and still seal it so it doens't leak?
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[06:03:02] <eric_unterhausen> I used a shopping bag
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[07:50:11] <someone972> Perhaps someone can help me understand the math in the simple trajectory planner for jogging.
[07:50:51] <someone972> Specifically the equation vel_req = -max_dv + sqrt(2*acc_lim*pos_err + max_dv*max_dv);
[07:51:36] <someone972> I was able to derive vel_req = sqrt(2*acc_lim*pos_err) using a velocity graph with contant slope
[07:51:58] <someone972> But I can't figure out how -max_dv + sqrt(... + max_dv*max_dv) comes in to play
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[08:01:20] <someone972> Perhaps it has something to do with velocity not changing linearly, but in steps based on period
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[09:16:58] <Loetmichel> mornin'
[09:18:26] <uw> hello!
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[09:45:39] <archivist> someone972, perhaps ask on the mailing list as there people playing with the planner at the moment I assume you have seen http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_Tp_Notes
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[11:16:52] <Deejay> moin
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[12:17:38] <Tom_itx> JT-Shop i thought you had a classic ladder tutorial...
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[12:56:29] <jthornton> Tom_itx, http://gnipsel.com/linuxcnc/index.html
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[13:06:54] <jdh> all the water outside turned hard this morning. Looks like that stuff that comes out of the freezer.
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[13:16:14] <Loetmichel> harhar
[13:17:03] <Loetmichel> just happenend to clean out our deep freezer... was about half an hour of work and a whole double kitchen sink full of the white hard stuff ;-)
[13:17:48] <Loetmichel> NOW one can get the drawers back out (and in) ;-)
[13:18:22] <archivist> I switched mine off on october as it fails in low temperatures
[13:19:30] <Loetmichel> its 13.2°c outside over here ;-)
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[13:19:57] <Loetmichel> and thanks to mining LTC on my computers its 26.8°C in my workshop at the moment ;_)
[13:20:06] <archivist> just under 10 when I last looked
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[13:23:38] <jdh> that is a much more sensible temperature than what we currently have.
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[13:34:03] <Vq> 8°C here in southern sweden
[13:34:15] <Vq> It's usually colder this time of the year.
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[13:39:43] <Loetmichel> Vq: i am in germany
[13:40:11] <Loetmichel> it is expected to be a white christmas... its about 20°c to warm at the moment ;-)
[13:43:41] <JT-Shop> yea, I just got back from getting my wife's car unstuck
[13:43:51] <jdh> tires frozen to the ground?
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[13:46:21] <eric_unterhausen> I wonder if my garage door is stuck
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[13:52:25] <JT-Shop> she stopped to see if a guy who slid off the road in his truck needed help. The truck was on it's side... stopped on a hill that was so slick when I walked back to my truck I had to grab the door handle to keep from sliding right by the truck
[13:53:05] <JT-Shop> I just had to coach her on how to start moving on ice and give the car a bit of a push
[13:54:30] <JT-Shop> I'm burning this now http://gnipsel.com/images/Dons-red-oak%2001.jpg
[13:55:10] <JT-Shop> that sucker had 3 cords of wood in it
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[13:59:19] <eric_unterhausen> good news is that the garage door opened
[13:59:31] <eric_unterhausen> we had rain right up until the cold hit us
[14:01:08] <someone972> Bit of a late reply, but thanks for the link. That looks like exactly what I was looking for.
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[14:03:20] <eric_unterhausen> that code is obviously government cheese, whoever wrote it originally was pretty old-fashioned
[14:04:31] <eric_unterhausen> the thing that really used to drive me crazy was when they re-used a variable to "save memory"
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[14:09:01] <someone972> Hmm, on further inspection the non-continuous case math is actually for the regular trajectory planner and not simple_tp used for jogging
[14:09:59] <someone972> I actually got very close to getting the equation used for simple_tp, but can't seem to get it exact
[14:14:40] <someone972> Maybe the equation I got is correct but they 'fudged' it a bit to make it easier to calculate? I guess I'd have to ask someone who knows more about it.
[14:15:26] <eric_u_cnc> I don't think there is anything right or wrong in the tp
[14:15:36] <eric_u_cnc> it's a controller, you choose
[14:16:00] <cradek> someone972: are you trying to fix a problem, or just understand it?
[14:16:10] <someone972> I'm just trying to understand it
[14:16:14] <cradek> aha
[14:16:32] <someone972> From what I understand it would still get to the position requested, it would just have slightly less velocity
[14:16:43] <eric_u_cnc> it's not something you can prove to be correct
[14:17:20] <someone972> Well the equation used can be proved in theory
[14:18:01] <someone972> In a perfect world that would be enough but of course real world physics is not perfectly approximated by the equations
[14:18:02] <eric_u_cnc> so can this b = z^6 - a +p^3.5
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[14:18:21] <someone972> I'm not quite sure what you are getting at.
[14:18:27] <cradek> I'm not either
[14:18:31] <eric_u_cnc> the tp is not attempting to model a physical system
[14:18:56] <someone972> It is actually, using acceleration and velocity limits to reach a position without overshooting
[14:19:54] <eric_u_cnc> no, it's a combination of physical variables into a quantity that is used for control
[14:20:03] <eric_u_cnc> it's not provably correct or incorrect
[14:20:34] <someone972> What physical variables are you talking about?
[14:20:35] <eric_u_cnc> all you can do is measure its performance
[14:21:54] <eric_u_cnc> just look at the things in your equation. max accel and max velocity
[14:22:25] <eric_u_cnc> it's obviously not a physical model, it's a desired quantity
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[14:22:55] <someone972> Those are physical limits which are determined by testing of the system, or can be set lower if desired
[14:23:56] <someone972> So I'd say it's definitely a physical model, and it models it fairly well at that
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[14:27:55] <R2E4> Is there a function similar to estop_latch we can use on regular outputs or do I have to get this function to work with ladder logic? Basically when there is an alarm, I want to latch an output.
[14:30:53] <jthornton> http://www.gnipsel.com/linuxcnc/hardware/mpg.html
[14:31:13] <R2E4> I was just there looking..... Jeez!
[14:31:40] <R2E4> Oh, thats for the mpg
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[15:12:26] <jdh> what would you think about a company who only lists an @aol.com email address?
[15:13:05] <R2E4> Invest in them and get them off AOL.
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[15:19:58] * JT-Shop looks like this today http://www.google.com/url?sa=i&rct=j&q=&esrc=s&source=images&cd=&cad=rja&docid=RxVcDrMdwiFrJM&tbnid=3K4UL2rXhDAnZM:&ved=0CAUQjRw&url=http%3A%2F%2Fwww.allposters.com%2F-sp%2FRandy-I-can-t-put-my-arms-down-A-Christmas-Story-Lifesize-Standup-Poster-Posters_i9561996_.htm&ei=CxvMUtSTFI_moASJqoHQBQ&bvm=bv.58187178,d.cGU&psig=AFQjCNHpHL7_QBEmB4U48wBsRNLYmdyp0Q&ust=1389194338150721
[15:20:16] <jdh> you win!
[15:20:22] <jdh> (ugliest URL award)
[15:20:36] <JT-Shop> damn google
[15:20:38] <JT-Shop> http://imgc.allpostersimages.com/images/P-488-488-90/68/6890/5SLJ100Z/posters/randy-i-can-t-put-my-arms-down-a-christmas-story-lifesize-standup-poster.jpg
[15:20:52] <jdh> and you get third place also!
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[15:26:56] <archivist> jdh they have no IT department
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[15:29:10] <archivist> and they are hard to train
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[15:34:34] <R2E4> net work-lite-toggle toggle.0.in <= hm2_5i25.0.7i77.0.0.input-05 net work-lite-control toggle.0.out <= hm2_5i25.0.7i77.0.0.output-02
[15:34:38] <R2E4> I cannot get that to work
[15:34:52] <R2E4> Does that look right?
[15:35:06] <archivist> both on one line?
[15:35:17] <R2E4> no seperate lines
[15:35:41] <R2E4> ah wait, forgot to load the rt funtion
[15:36:16] <pcw_home> you need to load the function and addf it to the servo thread
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[15:45:16] <someone972> The only thing I don't understand about the simple_tp.c equation is why the position correction comes out to max_dv*t
[15:45:58] <someone972> I.e. in the continuous case pos_err = vel_req*t/2, and in the non-continuous it is pos_err = vel_req*t/2 + max_dv*t
[15:46:23] <someone972> When I tried to think through it, it seemed like it should be max_dv*t/2
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[15:54:32] <skunkworks> someone972, there is a wip where the read-ahead depth is increased...
[15:55:26] <someone972> That shouldn't affect jogging though should it?
[15:56:28] <skunkworks> no
[15:56:37] <skunkworks> someone972, what are you trying to do?
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[15:56:57] <someone972> Just trying to understand how the equation used for jogging a single axis was derived
[15:57:32] <someone972> I've figured it out for the most part, just that one part doesn't make sense.
[15:58:54] <JT-Shop> R2E4, looks right to me
[15:59:12] <R2E4> yeah, its not working yet
[15:59:24] <R2E4> http://pastebin.com/B4n66juS
[15:59:27] <JT-Shop> did you load toggle to a thread?
[15:59:48] <someone972> I'm wondering if it should be vel_req*t/2 and they just changed it for ease of computation
[15:59:51] <R2E4> yeah
[16:00:09] <JT-Shop> what does toggle do in the watch window?
[16:00:17] <someone972> Since it's the difference between solving for vel_req^2 vs vel_req^2 + vel_req*max_dv
[16:00:40] <R2E4> I can see the input change states but the output doesnt
[16:01:59] <pcw_home> did you addf the function to the servo thread?
[16:02:38] <JT-Shop> is your config running now?
[16:03:09] <R2E4> yes
[16:03:39] <JT-Shop> open show hal configuration and unlink the toggle input
[16:03:42] <R2E4> pcw_home: yes
[16:03:50] <JT-Shop> the setp the toggle input
[16:03:58] <JT-Shop> http://linuxcnc.org/docs/html/hal/basic_hal.html#_unlinkp
[16:04:37] <JT-Shop> setp toggle.0.in 1
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[16:10:10] <R2E4> I unlinked it but when I try to setp, it spits an error saying it is connected to a signal
[16:13:00] <R2E4_> Pin 'hm2_5i25.0.7i77.0.0.input-08' unlinked
[16:14:10] <JT-Shop> did it report Pin 'toggle.0.in' unlinked
[16:14:29] <JT-Shop> in the show window?
[16:14:41] <R2E4_> no
[16:14:57] <cradek> http://boingboing.net/2014/01/06/high-end-cnc-machines-cant-b.html
[16:15:22] <R2E4_> it shoewed the pin unlinked in the text box below the execute command window
[16:16:11] <R2E4_> The pin is not shown linked to it in the show window
[16:17:10] <JT-Shop> you should be able to set the pin if it is not linked to a signal
[16:18:26] <archivist> cradek, retrofit opportunities!
[16:19:05] <cradek> isn't it though
[16:19:50] <archivist> it is similar to the software rental market where there is lock down
[16:20:06] <R2E4_> toggle.o.in is not linked to a pin, it is linked to lite-toggle signal
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[16:21:42] <JT-Shop> unlinkp toggle.0.in
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[16:22:46] <Loetmichel> archivist: retrofit was my first thought, too ;-)
[16:23:07] <Loetmichel> who am i to let a company decide what i do with my assets?
[16:23:19] <Loetmichel> there is a reason i dont buy anything from apple ;-)
[16:23:33] <archivist> the NSA is watching your assets
[16:23:55] <Loetmichel> that my be fact because of android on some of my devices
[16:24:21] <Loetmichel> but a CNC machine with linuxCNC on it should not be watched and be it just because its uninteresting ;)
[16:25:21] <Loetmichel> but really: paying for a machine the manufactirer has the ability to lock me out at any time they seem fit? no way!
[16:26:25] <R2E4_> it unlinked but I cannot setp it to 1
[16:28:22] <JT-Shop> what error does it give?
[16:29:19] <JT-Shop> setp toggle.0.in 1
[16:30:11] <R2E4_> Ok, so I can manually make it work. setting toggle.o.in to 1, energizes output, setting toggle.0.in to 0 then back to 1 de-energizes output
[16:31:12] <R2E4_> I see how using this tool can save lots of time....
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[16:31:24] <R2E4_> This is great
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[16:33:22] <JT-Shop> you might need some debounce
[16:33:29] <JT-Shop> http://linuxcnc.org/docs/html/man/man9/toggle.9.html
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[17:17:06] <R2E4> IS there a section in the forums where machine retrofits get documented?
[17:20:30] <R2E4> found i
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[18:03:57] <IchGuckLive> Hi all B)
[18:05:04] <IchGuckLive> today we hit a record high of 15DEG here in Germany
[18:05:26] <ries> IchGuckLive: you are lucky to be alive in these days!
[18:05:28] <jdh> nice. We were 1C off our record low
[18:06:10] <IchGuckLive> grandma saying the USX cold will hit us here in 3 weeks time O.O
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[18:15:44] <Loetmichel> my outside thermomenter says +9,7°c at the moment ;-)
[18:16:51] <CaptHindsight> up to -20C here already
[18:18:40] <Deejay> hmmm
[18:19:06] * Deejay hands a hot tea to CaptHindsight
[18:21:02] <CaptHindsight> you get used to it, you mostly need to block the wind if you work outside
[18:22:07] <skunkworks> I would ski down to 0F when I was younger...
[18:22:55] <andypugh> I have skied at -20C
[18:23:01] <andypugh> My beer froze at lunchtime.
[18:23:09] <CaptHindsight> seems whenever we went skiing in Wi it was always around 0
[18:23:15] <skunkworks> heh
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[19:14:12] <einar__> Running a program I can see pulses (on a scope) coming out of the Universal Stepper Controller board.
[19:14:57] <einar__> But when issuing G0 Z.. in MDI mode no pulses!? The pyramid in Axis moves though. How come?
[19:16:53] <IchGuckLive> stepgen not enabled in hal
[19:17:08] <IchGuckLive> or pulse frequenz to high
[19:17:28] <IchGuckLive> for scope use 5000 5000 8000 10000
[19:17:48] <IchGuckLive> then you can go back for 2500 2500 6000 8000
[19:17:53] <einar__> Stepgen in HAL, I don't think there is any. Pulse freq too high? My scope goes to 200MHz!
[19:18:02] <IchGuckLive> and then what ever your driver goes for
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[19:19:47] <IchGuckLive> einar mesa or normal Board stepconfwizard
[19:20:13] <einar__> No wizard. There is none for univstep.
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[19:21:00] <einar__> I'm the "wizard" myself. But my wand seems to be up my <beep>
[19:22:04] <IchGuckLive> net zenable axis.2.amp-enable-out => stepgen.2.enable
[19:22:10] <IchGuckLive> is this in your hal
[19:22:29] <IchGuckLive> so the stepgen is on pulsing
[19:23:18] <einar__> There is this: net Zenable => ppmc.0.stepgen.02.enable
[19:23:46] <IchGuckLive> ok and wher is the signal comming from
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[19:23:58] <IchGuckLive> net Zenable <= ???????
[19:24:02] <einar__> And it does pulse when running a program.
[19:24:42] <Jymmm> JT-Shop: This is the best log splitter I've seen yet!!! http://www.youtube.com/watch?v=_WfQ8kiNPhw
[19:25:07] <IchGuckLive> einar__: the mashine is homed so Go in MDI wirks
[19:25:19] <IchGuckLive> G0
[19:26:17] <IchGuckLive> i think its the enable chaiun if Xis enabled in programm it wil enable internaly all axis but not in MDI
[19:26:23] <einar__> It is homed, or it will not start running a program.
[19:26:50] <IchGuckLive> so take net Zenable <=axis.2.amp-enable-out
[19:27:00] <IchGuckLive> and it shoudt run
[19:27:05] <JT-Shop> Jymmm, too fast for me, the best I've ever seen is a hydro
[19:28:36] <IchGuckLive> ok im off BYE its late here
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[19:58:53] <sivu> is there a visual editor for pins/signals?
[20:02:04] <andypugh> People keep trying, but no.
[20:02:56] <andypugh> I think it can be done in Eagle, with HAL modules as components, but I don't think that project finished either.
[20:03:17] <andypugh> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Eagle2HAL
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[20:08:59] <CaptHindsight> did somebody have plans to compete with Labview? :)
[20:10:05] <andypugh> There was Crapahalic too
[20:11:08] <CaptHindsight> was there a logo design contest?
[20:14:14] <andypugh> I think it might still be there, I wonder if it works? http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=tree;f=src/hal/utils/halgui;h=33800a89fb73f5838ad59a3f86f3e0f6583662b6;hb=HEAD
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[20:17:56] <andypugh> Well, it runs. It doesn't do anything, but it runs.
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[20:19:40] <Jymmm> JT-Shop: Well, could change the gearing
[20:20:19] <Jymmm> JT-Shop: the return is just a spring
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[20:21:43] <Jymmm> JT-Shop: http://www.youtube.com/watch?v=noGIMhMDfpU
[20:23:14] <JT-Shop> I'm very familiar with that type of splitter
[20:25:21] <CaptHindsight> how about a canon powered splitter? Similar to a powder set gun like Hilti
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[20:32:30] <Jymmm> JT-Shop: Looks the best to me, 2nd would be the corkscrew
[20:35:03] <JT-Shop> Jymmm, do you split much firewood?
[20:35:22] <Jymmm> JT-Shop: not if I can help it =)
[20:35:25] <JT-Shop> http://gnipsel.com/images/splitter/
[20:35:27] <JT-Shop> lol
[20:36:40] <Jymmm> JT-Shop: slow return?
[20:36:54] <ReadError> http://www.dailygusta.com/Phone/i-GDLfhrz/0/X2/CA_01071415085208-X2.jpg
[20:37:01] <ReadError> sharing my new toy ;)
[20:37:11] <terabyte-> show off
[20:37:12] <ReadError> 3/8" carbonfiber
[20:37:15] <ReadError> yaaaaaa
[20:37:19] <ReadError> im like a proud father
[20:37:50] <terabyte-> i know that feeling :D
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[20:38:06] <terabyte-> its how i feel when i see flight videos from pilots better than me
[20:38:08] <Jymmm> ReadError: Oh, I have a bunch of that I got for free from a business that was closing
[20:38:24] <ReadError> lucky
[20:38:30] <ReadError> you selling it?
[20:38:35] <Jymmm> ReadError: Just pulling your chain =)
[20:38:42] <ReadError> ;(
[20:38:50] <terabyte-> lol buzz kill
[20:38:52] <Jymmm> ReadError: Nah, gonna make a dog house out of it
[20:38:58] <ReadError> lol
[20:39:18] * Jymmm twists the knife a little more
[20:41:03] <Jymmm> JT-Shop: I want to see the video of it in action =)
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[20:41:58] <CaptHindsight> any idea what polymer is mixed with the carbon ^^?
[20:44:10] <ReadError> CaptHindsight, I got it from DragonPlate
[20:44:18] <ReadError> not sure if they publish that, they might though
[20:45:38] <CaptHindsight> they have a wide variety
[20:46:26] <CaptHindsight> the sheets are epoxy
[20:48:20] <ReadError> seems to be well made
[20:50:40] <CaptHindsight> yeah, nice range
[20:52:30] <CaptHindsight> I've been working on ways to print finished carbon fiber products
[20:53:08] <CaptHindsight> I experienced sticker shock when I looked at wheels and other vehicle/bike parts
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[20:58:06] <Jymmm> Hmmm, they are replacing the water main and digging a trench. They have a MONSTER of tractor that has a pivoting-arm never seen that before
[20:58:32] <Jymmm> well, offsetable arm might be a better desc
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[20:59:12] <Jymmm> --- than can change from straight to _/-
[21:01:24] <CaptHindsight> Jymmm: is the old one cast iron?
[21:01:38] <Jymmm> probably
[21:06:06] <Jymmm> http://www.youtube.com/watch?v=E8upn0fiXBQ
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[21:13:21] <CaptHindsight> imagine that rescue with a bungie instead
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[21:19:29] <MrSunshine_> what are the odds that i manage to align the rails perfectly on the router when just throwing it all together ...
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[21:21:56] <CaptHindsight> did you machine slots or grooves for the rails?
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[22:01:50] <Deejay> gn8
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[22:11:04] <Jymmm> Cold enough for ya? http://www.youtube.com/watch?v=QCrrJs2areo
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[22:17:58] <andypugh> I wish they wouldn't mention "windchill" in that sort of cotext
[22:18:15] <andypugh> Windchill doesn't make it colder, it just makes hot people feel colder.
[22:18:47] <andypugh> I have not worked out why you don't get the same effect with cold water.
[22:18:56] <andypugh> (You don't)
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[22:39:51] <mshaver> Is there a way to load and run a g-code program with a pyvcp button? I'm trying to automate tool length setting.
[22:42:52] <Tom_itx> andypugh maybe it's because the boiling water is on the virge of becoming vapor
[22:43:40] <Tom_itx> i predict the same thing would happen if you could change it's elevation quickly
[22:44:11] <andypugh> mshaver: Do you actually need to _load_ the program?
[22:44:37] <Tom_itx> i've got 'run' on my pendant but not load
[22:44:44] <andypugh> It's easy to make a button run an O-word sub
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[22:47:00] <mshaver> My situation is this: I have a switch which a decending tool can depress, triggering the probe input and storing the Z height. I'd like to have a button that runs some g-code to do the g38.2 and some subsequent G10... things to store the tool length offset.
[22:48:14] <mshaver> I could have the operator _load_ the "set-tool.ngc" progrm first I suppose.
[22:51:44] <cpresser> frightening stuff: http://boingboing.net/2014/01/06/high-end-cnc-machines-cant-b.html
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[22:58:23] <Tom_itx> time for a retrofit on a brand new machine :)
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[23:02:11] <mshaver> andypugh: How do I make a button to run an o-word sub? Link to info?
[23:02:32] <andypugh> mshaver: MDI_COMMAND
[23:02:50] <andypugh> in the ini [HALUI] section
[23:03:34] <mshaver> andypugh: OK, will look at this! Thanks!
[23:04:31] <Tom_itx> mshaver you can see an example in my configs if you can weed through them
[23:04:40] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/cnc/configs/sherline/
[23:04:51] <Tom_itx> i think the buttons are in postgui.hal
[23:05:03] <Tom_itx> and the mdi stuff in the ini
[23:05:10] <einar__> when HAL Oscilloscope says 200 mSec per div, can I trust that? It does not match my real scope hooked up to step out.
[23:05:32] <Tom_itx> and display.xml
[23:08:13] <Jymmm> When a Craftsman hand tool has been discontinued, you can only get a gift card now.
[23:16:42] <mshaver> Thanks! MDI_COMMAND will do what I need!
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[23:18:06] <mshaver> Here's another question: Is there a way to sense (in HAL) when G1 is active?
[23:18:50] <mshaver> I'm trying to control the dust collection boot on a router and I want it to be in the "down" position only when I
[23:19:06] <mshaver> 'm in AUTO and G1 is active.
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[23:36:45] <CaptHindsight> Jymmm: they won't swap you with a next best tool?
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[23:40:06] <CaptHindsight> cpresser: even more so that people are getting used to this and not doing much about it
[23:41:20] <CaptHindsight> the reason given is BS since the GPS can tell them if the unit has been moved across a shop floor vs to Iran
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[23:59:09] <CaptHindsight> http://www.theregister.co.uk/2014/01/07/intel_demos_pconsd_tiny_computer_for_internet_of_things_and_wearables/