#linuxcnc | Logs for 2014-05-19

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[00:33:22] <zeeshan> 9.25
[00:35:44] <zeeshan> http://imgur.com/a/N5qRr
[00:35:46] <zeeshan> moar done
[00:35:48] <zeeshan> need to get a spacer
[00:35:55] <zeeshan> rather than using a gazillion washers
[02:02:39] <witnit> dang zeeshan, if you only had a cnc lathe you could get rid of all those washers :P
[02:17:07] <zeeshan> witnit ROFL exactly!
[03:43:41] <revo14> hola hablan español aqui?
[03:54:54] <revo14> if i have a draw in freecad can i generate g-code since linuxcnc?
[03:59:01] <Tom_itx> Jymmm, electrolytics are probably the worst
[03:59:31] <Jymmm> Tom_itx: smt?
[03:59:47] <Tom_itx> tantalum explode
[03:59:59] <Jymmm> blue?
[04:00:07] <Tom_itx> generally
[04:00:14] <Jymmm> ah
[04:10:42] <Jymmm> Tom_itxyour up late
[04:10:46] <Jymmm> Tom_itx your up late
[04:59:29] <eneuro> Hello today, just trying to compile and install heekscad from ./heekcnc.googlecode.com/heekscnc-read-only/INSTALL_HEEKS.bash but completed steps including heekscnc install: heekscnc_beta-1.0.0_i386.deb, but it fails in next step with heekscad after invoking: "cmake ." i got something like this: "Could not find module Findlibarea.cmake or a configuration file for package libarea. Adjust CMAKE_MODULE_PATH to find Findlibarea.cmake o
[05:01:41] <cpresser> eneuro: did you install libarea?
[05:01:53] <eneuro> I found: "heekscnc/heekscad$ find ./ -name "*libarea*.cmake" -type f" -> ./cmake/Modules/Findlibarea.cmake
[05:03:49] <eneuro> cpresser: yes I've did it by hand from while run into problems with Virtualbox shared folders and exported via nfs with noatime from main box and compilation fails only there at last stages I guess...
[05:07:47] <eneuro> I've changed in INSTALL_HEEKS only this: "BUILDPATH=/home/neuro/work/cnc" and "BUILDDIR=heekscnc" to fit into my exported NFS cnc directory .
[05:19:05] <eneuro> btw: I've latest LinuxCNC ISO installed under VirtualBox - ubuntu 10.04 updated if this helps-I will try make this step with libarea again and see what happends, but I'm not cmake expert - tried to export libarea_DIR, but maybe I shoud hardcode it in this install script?
[05:48:31] <eneuro> Reinstalled libarea but found recent changes in "heekscad/cmake/Modules/Findlibarea.cmake" "# Author: Romuald Conty <neomilium@gmail.com> Version: 20140512 " about week ago- maybe something is wrong there? Did you run without problems that last stage of Heekscad last time?
[05:59:04] <archivist> eneuro, better off nagging at the heeks mailing lists and forum
[05:59:34] <archivist> while there is an irc channel it has almost no use at all
[06:16:10] <eneuro> archivist: just contacted author of this last change in: ./heekscad/cmake/Modules/Findlibarea.cmake and I will try investigate myself. Just only was thinking that maybe other LinuxCNC users run into the same problems building HeeksCNC under latest LinuxCNC...
[07:21:04] <Deejay> mahlzeit
[07:36:44] <lair82> Hello Guys, We have been running pretty well on our 3 big turning centers, 10 hr shifts 5-6 days a week, all using Gscreen Industrial skin with a few slight modifications to keybindings and such, but stock build for the most part. we have pretty consistently from the inception of using Gscreen had problems with the control slowly through out the day getting slower and slower until the point that it freezes and we have to shut down an
[07:38:37] <lair82> We only have these problems when entering and modifying our wear offsets (DROGGE's tool offset patch) regularly through the day. If the operator is running straight forward without having to make offset changes the machine runs without issue. Any Thoughts as to what could be causing the system to crash?
[07:39:45] <lair82> After emailing cmorley last week he thinks maybe a memory leak?
[07:39:58] <micges> probably memory leak
[07:41:41] <lair82> What is the best course of action to establish that to be the culprit and how would I go about fixing it?
[07:45:55] <micges> lair82: give us point to this patch you use
[07:46:55] <micges> link I mean
[08:10:43] <lair82> http://www.linuxcnc.org/index.php/english/forum/20-g-code/24387-tool-offset-patch?start=30
[08:31:24] <Valen> I'm guessing yeah memory leak, how much ram do you have in your systems?
[08:31:45] * Valen pokes lair82
[08:32:59] <Valen> taking a look at the output of top then hit > to sort by memory usage could be informative
[08:41:21] <PetefromTn_> Morning folks..
[08:58:09] <lair82> All 3 of my machines show right around 3.2-3.3 Gigs of ram.
[09:10:57] <pcw_home> I would run top and see if there is some task taking a large amount of memory...
[09:12:25] <micges> lair82: when you run top you must check what task is taking most of memory
[09:13:01] <micges> I'm suspecting gscreen becouse there is nothing special in this tool offset patch
[09:16:26] <pcw_home> If you type "M" after top is running top will sort tasks by % memory usage
[09:22:55] <lair82> The following results are from a machine that is sitting idle, and has not run yet today. 1st item Gscreen, VIRT 127M RES 41M SHR 20M
[09:25:32] <lair82> I am waiting for the machine that is running to freeze up to see what its values are, it will be a little while.
[09:26:15] <CaptHindsight> I knew those cheap routers were good for something http://www.3ders.org/articles/20140518-print-intricatedly-designed-pancakes-with-pancakebot-printer.html
[09:27:51] <PetefromTn_> Hehehe that is actually pretty cool.
[09:28:00] <PetefromTn_> Custom printed pancakes..
[09:28:52] * archivist demands faster delivery of his pancakes
[09:29:03] <PetefromTn_> I need one with a big clown face to make me smile while I eat my breakfast.
[09:29:26] <PetefromTn_> Oh wait I am afraid of clowns...scratch that ;)
[09:30:58] <malcom2O73> My BBB cape arrives today! Woohoo!
[09:31:23] <PetefromTn_> is that like a batman cape?
[09:31:50] <malcom2O73> If batman was CNC, sure
[09:32:11] <CaptHindsight> malcom2O73: what is the price of a cape/shield/serape/expansion board for the BBB?
[09:32:34] <malcom2O73> CaptHindsight: Depends, this one was $120, there are a few of them out there varying in price around that point
[09:33:35] <CaptHindsight> so $45 for the BBB and $120 for an IO board = $165!?
[09:33:45] <archivist> heh
[09:33:53] <CaptHindsight> malcom2O73: what is on the IO board?
[09:33:57] <malcom2O73> CaptHindsight: There abotus
[09:34:46] <malcom2O73> CaptHindsight: Level converters (BBB is 3.3v, drivers at 5v), a bnuch of digital I/O protection, 4 analog inputs, two parallel port connectors
[09:34:50] <malcom2O73> That sort of stuff
[09:35:07] <malcom2O73> It's this: http://www.pmdx.com/PMDX-432
[09:46:58] <CaptHindsight> http://linuxgizmos.com/allwinner-octacore-soc-due-first-on-new-pcduino-sbc/
[09:50:26] <CaptHindsight> http://linuxgizmos.com/sbc-mimics-raspberry-pi-has-faster-cpu-adds-sata/
[09:50:51] <malcom2O73> That RCA connector... *twitch*
[09:51:12] <malcom2O73> Saw that though, thinking about picking one up and giving it a shot as a simple NAS
[09:51:22] <CaptHindsight> Allwinner ARM soc's are in just anout every form factor now
[09:52:00] <CaptHindsight> malcom2O73: you can watch HD video while running Linuxcnc on those
[09:52:23] <malcom2O73> CaptHindsight: Wonder what the maximum step clock would be on something like that
[09:53:09] <CaptHindsight> preempt_rt was 80uS, xenomai 40uS
[09:54:03] <malcom2O73> That's only a 25khz step clock, my PC can do that.
[09:54:41] <malcom2O73> But that would make a decent PC replacement
[09:54:54] <CaptHindsight> sure, lots of people use $20 pc's
[09:55:40] <pcw_home> You could probably use the DMA trick to get a few 100 KHz
[09:56:15] <pcw_home> if you have enough processor to create the "tracks"
[09:58:43] <CaptHindsight> the advantage of the Allwinner soc's vs the TI used in the BBB is that Allwinner includes a GPU to support fast HD displays and for a fraction of the price of the TI soc
[09:59:33] <malcom2O73> That's always been the raspberry/alike's selling point over the BBB. The BBB wasn't meant for video
[09:59:39] <CaptHindsight> the only thing I've seen in the TI are the extra two microcontrollers for fast interrupts
[10:00:43] <CaptHindsight> yes, so it limits the BBB to headless applications where the Allwinner boards can do both and for lower cost
[10:01:14] <malcom2O73> At the limit of a 25khz step clock unless someone gets the trick pcw mentioned working with linuxcnc.
[10:01:52] <malcom2O73> I'm hitting a cap at my PC's 25khz step clock, my reason for going to the BBB is the small form factor, plus the faster clock. Mesa was another option, but I don't want a huge PC sitting there
[10:01:53] <CaptHindsight> I'm not sure why the BBB has gotten so much interest
[10:03:05] <CaptHindsight> malcom2O73: or adds a $10 FPGA
[10:03:11] <pcw_home> FPGA+Allwinner is cheaper (and more flexible) than BBB
[10:03:12] <pcw_home> Though the TI chips may have a longer availability cycle
[10:03:37] <malcom2O73> CaptHindsight: Like I said, I didn't want a huge PC sitting there with a Mesa card.
[10:04:47] <FrankZappa> vesa cards are pretty cool tho
[10:30:48] <CaptHindsight> pcw_home: I can't keep up anymore, are these modules based on an industry standard? https://www.olimex.com/Products/SOM/A20/
[10:31:09] <CaptHindsight> https://www.olimex.com/Products/SOM/AM3352/
[10:31:25] <pcw_home> every board a new standard!
[10:31:34] <CaptHindsight> yeah
[10:31:40] <malcom2O73> Heh, standards, the only thing not standardized
[10:32:38] <ju-emb> Hi all,
[10:32:40] <ju-emb> sombody knows where to look for a big CNC lathe that is good for retrofit with LCNC?
[10:32:42] <ju-emb> I need:
[10:32:44] <ju-emb> Center distance 2000mm
[10:32:46] <ju-emb> Swing ofer bed 1000mm
[10:32:47] <pcw_home> dev board du jour
[10:32:48] <ju-emb> motor Power > 18kW
[10:32:59] <SpeedEvil> That is quite a big lathe indeed.
[10:33:08] <ju-emb> I now
[10:33:13] <CaptHindsight> ju-emb: where do you want to drag it home from?
[10:33:14] <ju-emb> know
[10:33:18] <CaptHindsight> area in general
[10:33:26] <ju-emb> on the earring
[10:34:00] <archivist> or drag to
[10:34:02] <ju-emb> Doesn't matter, somwhere from US or Europe
[10:34:16] <ju-emb> To Peru
[10:34:49] <CaptHindsight> http://www.boardcon.com/ I like their name, a much better fit for Broadcom
[10:35:23] <archivist> there is a lathe in aberdeen but too small I think http://www.ebay.co.uk/itm/Mazak-QS30-4-Axis-Universal-CNC-Lathe-T4-Controls-/171331715058?pt=UK_Home_Garden_PowerTools_SM&hash=item27e42a7ff2
[10:35:49] <SpeedEvil> I am highly amused that some people think well of broadcom because of the pi
[10:36:04] <pcw_home> http://www.ebay.com/itm/CNC-LATHE-TRAUB-TND-360-TURNING-CENTER-WITH-TX8-CONTROL-NICE-HEAVY-DUTY-LATHE-/121330035749?pt=BI_Lathes&hash=item1c3fd56c25
[10:36:59] <pcw_home> oops not big enough
[10:44:41] <CaptHindsight> http://www.ebay.com/itm/Gisholt-5L-Big-Bore-Turret-Lathe-/161296531060
[10:45:27] <pcw_home> http://www.ebay.com/itm/33-4-swg-x-120-cc-LEADWELL-LTC-50-CXL-TURNING-CENTER-CNC-LATHE-/191164085669?pt=LH_DefaultDomain_0&hash=item2c824475a5
[10:45:40] <CaptHindsight> http://www.ebay.com/itm/NEW-BIRMINGHAM-KGC-48120-48-55-x-120-GAP-BED-ENGINE-LATHE-w-4-Spdl-BORE-/400701033454
[10:49:11] <archivist> we had fun moving a 28ft lathe from a factory to a museum
[10:49:50] <Jymmm> Wouldn't it have been easier to build a museum (annex) around the lathe instead?
[10:50:24] <archivist> no we had a space where one should be http://www.claymills.org.uk/tour/workshop.html
[10:51:13] <CaptHindsight> rope, lard and logs just the druids
[10:51:44] <archivist> apart from the lorry crane it was all mandraulic moved
[10:52:10] <Jymmm> beer?
[10:52:16] <archivist> and it splits in two half way down the bed
[10:56:27] <CaptHindsight> http://www.ebay.com/itm/IKEGAI-TNC-125S-CNC-LATHE-B31555-/360858256309 Distance Between Centers: 393.37" Maximum Swing over Carriage: 82.67" with room for you to grow
[10:57:18] <CaptHindsight> http://www.ebay.com/itm/TACCHI-HD-1450-1600-X-3000-CNC-LATHE-B31817-/261396434121
[10:58:24] <CaptHindsight> http://www.ebay.com/itm/44-x-120-LODGE-SHIPLEY-PROFITURN-50-12-12-625-HOLE-CNC-LATHE-/291025008361
[11:00:42] <Jymmm> archivist: I see a leather band around the spindle. Is the lathe operational?
[11:01:10] <CaptHindsight> http://www.ebay.com/itm/42-5-68-135-sw-X-108-300-cc-LEBLOND-NK4025-DOUBLE-SLIDING-CNC-GAP-LATHE-/290964985381
[11:01:15] <archivist> Jymmm, yes
[11:01:51] <Jymmm> archivist: Nice, you guys ever show things working/making something?
[11:02:01] <archivist> CaptHindsight, at that price they should paint it
[11:02:12] <CaptHindsight> http://www.ebay.com/itm/2008-Mori-Seiki-SL603B-2000-CNC-Lathe-/400706375686
[11:02:27] <archivist> yes I was turning a wooden pattern on an open day
[11:03:00] <Jymmm> cool
[11:03:27] <Jymmm> archivist: You guys should run a raffle to see who wins whatever you make =)
[11:03:50] <Jymmm> Just a small way to earn some coins for the museum
[11:03:53] <archivist> nah stuff gets made to restore the site
[11:05:33] <Jymmm> You don't thinnk a visitor would like a made on the fly souvenir?
[11:05:33] <ju-emb> CaptHindsight: it's a lot to look for
[11:06:13] <archivist> Jymmm, they do that in the forge
[11:07:24] <Jymmm> archivist: Ah, heh I see that at Knotts Berry Farm (an amusement park), they make horseshoe puzzles they sell there.
[11:07:26] <ju-emb> is it recommendable to convert a conventional in a CNC lathe?
[11:07:57] <ju-emb> I think of leadscrew changes and the like
[11:07:58] <archivist> can be, depends
[11:08:43] <archivist> you may get a much cheaper starting base that way
[11:10:03] <ju-emb> that's true, but that get's compensated later buying the leadscrews and motor mounts
[11:10:50] <archivist> if you control your gcode to be unidirectional you can keep the original screws
[11:11:11] <Jymmm> archivist: What do you think? Tektronix T935 35mhz
[11:12:13] <Jymmm> archivist: One probe, hasn't been calibrated in at least 15 years (circa 1977), asking $60
[11:12:55] <Jymmm> "portable" at 15 LBS =)
[11:12:59] <archivist> bit expensive at that age
[11:13:30] <Jymmm> Think $40 would be reasonable?
[11:13:42] <archivist> if its a runner
[11:14:06] <CaptHindsight> I find digital Tek scopes all the time that just need the self calibration performed
[11:14:31] <archivist> it was a cheaper plastic cased scope http://w140.com/tekwiki/wiki/935
[11:14:37] <CaptHindsight> they start up with a scary error code that you need to look up in the manual
[11:15:20] <Jymmm> It powers on, got from his dad years ago, I'm not sure what/how to check it. Says little to no burn-in on the CRT.
[11:15:54] <Jymmm> My laser is semi-fubar, I need to try and isolate where the problem is, no schematics available.
[11:16:10] <archivist> I find switches a pain at that age, you have to twiddle all of them to clean them
[11:16:16] <Einar1> Easy check of scope is to compensate the probe(s).
[11:17:06] <archivist> was not a common scope, I dont have the manual
[11:17:08] <Jymmm> archivist: contact cleaner help with that?
[11:17:19] <Jymmm> archivist: Oh, you want the manual for it?
[11:17:25] <archivist> let them self clean
[11:17:31] <Jymmm> k
[11:17:56] <archivist> look at that site I linked, it has the manuals
[11:18:28] <archivist> well the base 935 anyway
[11:18:55] <Jymmm> Ok, yeah, that's the one I have. Including the inked calibration notation =)
[11:26:23] <CaptHindsight> http://www.automationdirect.com/adc/Shopping/Catalog/Pushbuttons_-z-_Switches_-z-_Indicators/Eaton_Cutler-Hammer_22mm_%28E22_Series%29/Illuminated_Pushbuttons any better sources for similar?
[11:29:44] <archivist> are they using a special kind of pixie dust in them, bit expensive
[11:32:43] <CaptHindsight> http://www.automationdirect.com/adc/Shopping/Catalog/Pushbuttons_-z-_Switches_-z-_Indicators/22mm_Plastic/Illuminated_Pushbuttons_Flush_-a-_Extended plastic versions are 1/4 the price
[11:34:19] <Einar1> This is the oldest scope I use: http://www.ebay.com/itm/TEKTRONIX-2236-OSCILLOSCOPE-100-MHz/291146832491?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222005%26algo%3DSIC.PROD%26ao%3D1%26asc%3D20131003132420%26meid%3D7013229376729698218%26pid%3D100005%26prg%3D20131003132420%26rk%3D4%26rkt%3D6%26sd%3D350307965857&rt=nc
[11:35:08] <jdh> that's quite the url
[11:35:33] <Einar1> And I still use it now & then even if I have the brand new ones with godknowswhat features. Sometimes there's nothing beating an analog scope!
[11:35:47] <Connor> http://www.ebay.com/itm/291146832491 < same item.. shorter URL
[11:36:41] <jdh> connor: write a chrome plug in that does that.
[11:36:55] <Einar1> The downside is no probes! A good set of probes does not come cheap.
[11:37:04] <Connor> Umm. I don't write plugins.
[11:37:15] <jdh> why not
[11:38:20] <Jymmm> http://search.ebay.com/291146832491
[11:38:20] <Connor> I dunno.. never thought about it... too much other stuff going on.
[11:38:26] <jdh> me too.
[11:38:33] <jdh> so, I was hoping you woudl do it.
[11:38:52] <Jymmm> http://search.ebay.com/free+sex+or+whatever+you+want+to+search+for+goes+here
[11:39:10] <jdh> I found a box with 6 Tek P6103 probes in it at work. Still sealed in teh bags
[11:39:22] <Connor> http://ebay.com/itm/291146832491
[11:42:10] <jdh> I have a tek tds2024 at work I use every other year or so when I remember I have it
[11:43:58] <IchGuckLive> hi all B)
[11:46:35] <IchGuckLive> XXCoder1: v hi
[11:47:10] <IchGuckLive> CaptHindsight: yoshimitsuspeed gave up early tonight
[11:48:04] <CaptHindsight> IchGuckLive: not sure if he tried gedit or not
[11:48:14] <IchGuckLive> agree
[11:48:39] <IchGuckLive> this are people that came from windows and tghink one buttonpush is it
[11:48:53] <IchGuckLive> to get 12 axis + TC going
[11:50:32] <IchGuckLive> eneuro: did you finaly got true heeks
[11:53:07] <IchGuckLive> pcw_home: the lathe on ebay is my education mashine traub tnc360 tx8 !
[11:55:10] <pcw_home> http://www.linuxcnc.org/index.php/english/forum/49-basic-configuration/26982-dro-values-not-zero-on-startup?limitstart=0
[11:58:06] <pcw_home> and:
[11:58:08] <pcw_home> http://www.linuxcnc.org/index.php/english/forum/26-turning/26065-current-turning-capabilities-status?start=100#38943
[12:01:25] <pcw_home> http://www.linuxcnc.org/index.php/english/forum/49-basic-configuration/26982-dro-values-not-zero-on-startup?limitstart=0
[12:01:26] <pcw_home> and:
[12:01:28] <pcw_home> http://www.linuxcnc.org/index.php/english/forum/26-turning/26065-current-turning-capabilities-status?start=100#38943
[12:01:50] <pcw_home> oops sorry wrong window twice
[12:06:17] <IchGuckLive> nice reading's
[12:08:31] <IchGuckLive> FungiFox: http://kp-shadowsquirrel.deviantart.com/#/art/Lola-Bunny-Pose-3-206711139?hf=1 !! ;-)
[12:10:54] <FungiFox> IchGuckLive: ?
[12:11:08] <IchGuckLive> just a guess on your nick
[12:12:16] <FungiFox> nets slow, im not loading that. Im not a furry or whatever your thinking.
[12:12:52] <IchGuckLive> sorry for this
[12:14:19] <Loetmichel> FungiFox: lola (bunny) from the movie "space jam"
[12:14:20] <Loetmichel> ;-)
[12:25:05] <IchGuckLive> Loetmichel: tere are quite nice 3d models on the page
[12:25:26] <Loetmichel> so?
[12:25:27] <IchGuckLive> but saketchup is best forthis
[12:25:34] <Loetmichel> so?
[12:25:48] <Loetmichel> i.e.: why should i care?
[12:26:06] <IchGuckLive> <- ust spaming the chanel O.o
[12:28:00] <IchGuckLive> hi bedah how is the weather in the north
[12:28:42] <bedah> hi live, fine fine, blue sky
[12:29:09] <IchGuckLive> ;-) as here 2
[12:29:17] <bedah> fein fein :)
[13:11:25] <eneuro> if you had any hints and could suggest documentation how to configure LinuxCNC to output on LPT port pulses for cylindrical CNC machine coordinates sytem from 3 axis CAM G-code cartesian it could be great http://www.linuxcnc.org/index.php/english/forum/49-basic-configuration/27846-cartesian-g-code-to-cylindrical-machine-coordinate#47061 ;)
[13:12:44] <archivist> eneuro, just send the x or y to the rotary
[13:13:53] <archivist> just need to scale your axis to the circumference of the part
[13:14:15] <IchGuckLive> eneuro: why dident you just write a post cam on heeks
[13:14:39] <IchGuckLive> did you see my videos on how to get your own postprocess
[13:15:59] <IchGuckLive> eneuro: your pic looks like our projekt on radiation farm planter IM the Prof O.o
[13:16:15] <eneuro> IchGuckLive: just was guessing only that maybe postprocesors can do this, but im new to cnc and thought that maybe linuxCNC could do this job..
[13:16:47] <archivist> there are choices
[13:16:49] <IchGuckLive> you can wright a simple gcode translater
[13:17:03] <IchGuckLive> like oure wikipedia
[13:17:21] <IchGuckLive> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Simple_LinuxCNC_G-Code_Generators
[13:17:57] <IchGuckLive> so read XY g-code in and put X,R out
[13:18:12] <IchGuckLive> its in python
[13:18:21] <IchGuckLive> so no factor on beginners
[13:22:01] <eneuro> I prefer C/C++/Java but can do it in python.. but then I simply read into linuxcnc this translated G-code? LinuxCNC Axis will show nothing then? I'd like to use Axis from linuxcnc to run it on this custom machine...
[13:22:21] <Connor> Java Ewww.. Yuck. :)
[13:22:53] <IchGuckLive> eneuro: http://pastebin.com/Cbsa75yV
[13:23:27] <IchGuckLive> this will be a preset on file in and out
[13:23:36] <IchGuckLive> needs only a function to translate
[13:24:20] <archivist> eneuro, you can just connect your rotary to the x or y no translation needed then all depends on what you want to do
[13:26:03] <IchGuckLive> eneuro: thats what archi is expecting you http://www.linuxcnc.org/docs/2.4/html/motion_kinematics.html
[13:26:22] <eneuro> My idea was that maybe I will be able to create in any CAM G-code for this job, simulate in, and then load into Axis oryginal XYZ cartesioan, and need some trick to translate in the fly cylindrical to LinuxCNC LPT port and leave oryginal G-code not changed?
[13:27:48] <IchGuckLive> thats done wit the kinetic
[13:27:59] <IchGuckLive> read it
[13:28:13] <IchGuckLive> Robot arm is the trick
[13:28:50] <eneuro> Thank you, I will take a look, read more and come back soon, while still fighting with last stage of Heekscnc instalation under Ubuntu ;)
[13:30:40] <IchGuckLive> eneuro: do you got linuxcnc runnig
[13:31:12] <archivist> I was not talking about motion_kinematics.html
[13:31:41] <IchGuckLive> genserkins will transform it
[13:32:52] <IchGuckLive> TERMINAL try "genserkins i 300 100 0 0 0 0
[13:33:36] <eneuro> I've installed latest LinuxCNC 2.5.4 but under VirtualBox so far to test it and try simulation mode of Axis to be able to design PCB hardware for this monster ;)
[13:34:13] <IchGuckLive> http://foengarage.de/pcb.jpg
[13:34:26] <IchGuckLive> O.o
[13:34:30] <archivist> ratsnets build till long before one commits to pcb
[13:34:51] <IchGuckLive> ok im off till tomorrow
[14:02:00] <CaptHindsight> http://www.ebay.com/itm/331200954100 $20 3500psi hydraulic pump is not bad
[14:04:20] <archivist> danfoss is at the cheap end of the scale I think
[14:04:49] <CaptHindsight> well $20 :)
[14:04:52] <Connor> CaptHindsight: What you doing to use it for...
[14:05:11] <archivist> cheap suds pump
[14:05:26] <CaptHindsight> depends on the seals
[14:05:56] <archivist> dunk it in the suds then you dont care :)
[14:06:42] <archivist> I like a pure oil coolant for gear cutting
[14:07:34] <CaptHindsight> yeah, would make a decent coolant pump
[14:17:27] <jdh> I have a subscription to Digital Machinist magazine. Every month there is a column called 'along the gcode way' For years, the column has had no gcode, mainly just openscad code for 3d printing.
[14:17:46] <jdh> I am oddly offended by it.
[14:20:19] <Connor> http://www.ebay.com/itm/190959552031
[14:20:36] <Connor> Okay... how the heck is that possible with a 3-Jaw chuck? bolts Through it ??
[14:21:07] <jdh> looks that way
[14:21:53] <Connor> All the 3 jaw chucks I've seen have a mating gear under it.. bolts would go right through it..
[14:21:57] <Connor> I guess it could be smaller...
[14:22:18] <Loetmichel> hmmm
[14:22:25] <Connor> also the table must have 3 T slots instead of 4...
[14:22:31] <Connor> very odd.. I've not seen that before..
[14:22:32] <Loetmichel> maybe thet three bolts are for the upper plate?
[14:22:49] <Loetmichel> and the lower plate is boltet by seperate bolts to the rotary table?
[14:22:52] <Connor> They're through bolts..
[14:23:02] <Connor> look at the 3rd picture..
[14:23:28] <Loetmichel> hmmm
[14:23:30] <Loetmichel> strange
[14:24:06] <Loetmichel> then the xmaller worm gear is the only solution possible
[14:24:15] <Loetmichel> ir the chuck is no chuck ;-)
[14:25:33] <CaptHindsight> jdh: there is some sort of brain freeze going on with those glue guns
[14:27:16] <CaptHindsight> they are somehow intimidated by working with traditional CAD and CNC tools
[14:27:48] <CaptHindsight> but why a publication decides to no longer focus on g-code is sad
[14:28:24] <CaptHindsight> maybe new young editors that follow (mis)direction well
[14:38:29] <CaptHindsight> http://www.qualitycontrolcorp.com/sites/default/files/WebsYC_ProdData.pdf data sheet for the $20 pump
[14:40:49] <CaptHindsight> so only 2500 psi max
[14:44:08] <CaptHindsight> Connor: it has nitrile rubber seals, so oils and monomers
[14:48:11] <archivist> Connor, check the rotary backlash before you buy
[14:53:57] <CaptHindsight> http://www.automationtechnologiesinc.com/wp-content/uploads/downloads/2014/05/KL-4042D.pdf no pinout for the serial port for tuning
[14:54:34] <CaptHindsight> anyone crack the case on the KL4042D to see which pins are used for RX/DX?
[14:55:06] <CaptHindsight> http://www.automationtechnologiesinc.com/products-page/digital-stepper-motor-driver/digital-stepper-driver-kl-4042d-heat-sink-is-included
[14:55:40] <CaptHindsight> $7 cable required http://www.automationtechnologiesinc.com/products-page/digital-stepper-motor-driver/calibration-cabel
[14:57:49] <CaptHindsight> http://www.leadshine.com/Download.aspx?Type=software looks like it's just the software from leadshine
[15:02:19] <CaptHindsight> http://www.leadshine.com/UploadFile/Down/RJ11%20Connector%20for%20RS232%20Communication.pdf
[15:05:26] <jdh> has anyone seen/used the leadshine G540-alike?
[15:06:46] <CaptHindsight> the leadshine db9 to rj11 cable is the same for both leadshine and the keiling
[15:07:26] <jdh> I assume the keling one is just a leadshine
[15:07:43] <CaptHindsight> yeah, but with some differences
[15:08:00] <CaptHindsight> leadshine specs 50v max and keiling only 36v
[15:08:44] <CaptHindsight> but leadshines spec mentions 36v as typical
[15:09:17] <CaptHindsight> http://www.leadshine.com/productdetail.aspx?type=products&category=stepper-products&producttype=stepper-drives&series=EM&model=EM503 might be the keiling automationtechnology KL-4042D
[15:11:31] <jdh> I meant the multi-axis G540 like one
[15:11:44] <jdh> http://tinyurl.com/kmq6yoy
[15:11:57] <CaptHindsight> jdh: those are ones I'm using
[15:12:25] <CaptHindsight> jdh: yeah I've used that one as well, works great
[15:12:33] <CaptHindsight> I have to get more in
[15:13:04] <jdh> 1 axis less than the G540, but configurable stepping and 60V
[15:14:55] <CaptHindsight> I still have to test the Mesa config for the 6i25 to MX3660
[15:16:08] <CaptHindsight> jdh: it's nice and quiet
[15:16:16] <CaptHindsight> no problems with them yet
[15:16:31] <jdh> the fixed 10x stepping on teh geckos bugs me (never used one though)
[15:16:45] <CaptHindsight> and it fits into a mini-itx case
[15:18:09] <Connor> Uggg... Can't find what I'm looking for.....
[15:18:28] <CaptHindsight> http://tinyurl.com/mct5ugg this one along with 2nd power supply
[15:18:44] <Connor> Need industrial style latching push button switch for 120v for spindle and steppers.. spindle needs to be 15Amps, stepper 10amps..
[15:19:05] <Connor> everything I find is momentary, and either 220 or 660 or 24v.. and low amps..
[15:19:08] <zeeshan> CaptHindsight: im pretty sure leadshine
[15:19:09] <zeeshan> longs motors
[15:19:16] <zeeshan> and automationtechnologies are just the same drive
[15:19:19] <zeeshan> just rebranded
[15:19:25] <zeeshan> *sell the same drives
[15:19:33] <jdh> Connor: why not twist switches?
[15:19:33] <zeeshan> longs motors does it at 1/5th the cost
[15:20:00] <zeeshan> jdh did you see this
[15:20:01] <zeeshan> http://imgur.com/a/N5qRr
[15:20:03] <CaptHindsight> zeeshan: yes, he's a few minutes away from me, I've been to his warehouse several times
[15:20:06] <Connor> Same thing.. 220 or 660, or something odd, and not enough amps.
[15:20:15] <zeeshan> ill replace the 1000 washers when i get the lathe running :P
[15:21:24] <CaptHindsight> zeeshan: that looks like an Enco/Grizzly
[15:21:33] <zeeshan> CaptHindsight: its a busy bee :P
[15:21:45] <zeeshan> i bet grizzly has a copy of it
[15:22:07] <CaptHindsight> yeah, I'm getting one back into business right now
[15:22:27] <CaptHindsight> one of the pins in the gears got sheared off
[15:22:31] <zeeshan> https://www.grizzly.com/products/12-x-36-Gunsmithing-Lathe/G0750G
[15:22:34] <zeeshan> looks like this one
[15:22:44] <zeeshan> just different paint job :P
[15:22:45] <jdh> Connor: aren't the voltages just max ratings?
[15:23:25] <CaptHindsight> really close to the 12 x 36 enco
[15:23:43] <Connor> jdh: If they are.. most I've seen is 5amps...
[15:24:13] <Connor> I'm guessing that most of these are low voltage / low amps because they use relays to toggle the high current stuff ?
[15:24:27] <jdh> 231231814181
[15:24:30] <jdh> aren't those 15 amps?
[15:24:35] <CaptHindsight> Connor: yes
[15:26:14] <Connor> I'll use a rotary 3 way for the coolant pump.. Manual OFF Computer, then I need a On/Off for the servo's and a On/Off for the Spindle.
[15:27:22] <zeeshan> on/off for servo?
[15:27:35] <Connor> Servo's/Steppers...
[15:27:41] <zeeshan> i thought you had that hooked up w/ the e-stop?
[15:27:41] <Connor> the PSU for the steppers.
[15:27:51] <Connor> I Do. This is for mains..
[15:28:10] <Connor> I have no mains disconnect.. I've just been unplugging it..
[15:28:21] <zeeshan> ohg
[15:28:23] <Connor> but now that I have everything mounted.. I want a mains on/off
[15:28:26] <zeeshan> i have a disconnect sw
[15:28:40] <zeeshan> with aux pins
[15:28:44] <Connor> These will be mounted on the front of the cpu case.
[15:28:48] <zeeshan> so it kills the 220v and 110v together
[15:29:32] <CaptHindsight> Connor: you'd switch those with a contactor/relay
[15:29:52] <zeeshan> you think you'd need a contactor for that? :P
[15:30:08] <zeeshan> these disconnect switches are rated for fairly high siwtchiing currents
[15:30:36] <zeeshan> http://www.automationdirect.com/adc/Overview/Catalog/Circuit_Protection_-z-_Fuses_-z-_Disconnects/Disconnect_Switches/UL_508_Rated_Non-Fusible_Disconnects
[15:30:37] <zeeshan> those
[15:31:30] <Connor> those aren't exactly panel mount...
[15:31:39] <zeeshan> they are?
[15:31:41] <zeeshan> mine is a panel
[15:31:47] <archivist> I use a rail mount 15A MCB/ mains switch
[15:32:01] <Connor> and contactor/relay would still require a 12/24v supply..
[15:32:15] <zeeshan> there is 110v contactors
[15:32:32] <CaptHindsight> well to really be of help at this point we'd need pics and a diagram of what you already have
[15:32:43] <CaptHindsight> and what space is left
[15:33:00] <archivist> just visible top right http://www.collection.archivist.info/archive/DJCPD/PD/2008/2008_01_05_cnc_build_start/P1050048.JPG
[15:33:07] <zeeshan> http://i130.photobucket.com/albums/p252/turbozee84/C3600199-EF6C-476A-B0D0-BC44F593E2D2_zpso42uv675.jpg
[15:33:12] <zeeshan> white siwtch on the right
[15:33:14] <zeeshan> = disconnect
[15:34:09] <Einar1> Archivist: Can you reach a USA URL now? It seems I reach any european URL's but no USA ones?
[15:34:40] <archivist> Einar1, sure
[15:35:05] <Einar1> Strange!? My passport is still valid...
[15:35:24] <zeeshan> http://i.ebayimg.com/00/s/MTAwMFg3NDY=/z/qh4AAOxy2CZTcBC6/$_20.JPG
[15:35:25] <archivist> the NSA hates you :)
[15:35:26] <Connor> uploading pictures.. be just a few
[15:35:34] <CaptHindsight> P1050048.JPG cannot be displayed because it contains errors
[15:35:34] <zeeshan> whats so special about interapid indicators?
[15:35:41] <zeeshan> they dont look any different than mitutoyos
[15:36:03] <Einar1> They should fix their proxy!
[15:36:11] <archivist> CaptHindsight, reload probably interrupted download
[15:36:35] <zeeshan> archivist: fancy power supply
[15:36:50] <zeeshan> in uk they use yellow for ground?
[15:36:55] <zeeshan> brown for hot?
[15:36:56] <archivist> big enough for a few steppers :)
[15:37:01] <zeeshan> blue for neutral?
[15:37:15] <archivist> yellow/green for gnd
[15:37:33] <zeeshan> didnt know that :D
[15:38:13] <archivist> but ignore any colours in my wiring, I just use available wire sometimes
[15:39:16] <zeeshan> when you guiys do your wiring
[15:39:22] <zeeshan> do you leave your computer power separate?
[15:39:34] <archivist> mine is separate
[15:39:35] <zeeshan> that way you can use your computer while your cnc system is powered down? :P
[15:39:44] <zeeshan> okay cool
[15:39:50] <zeeshan> i thought i was weird for keeping is separate
[15:39:54] <Einar1> Archivist: Do you use a regulated PSU for your stepper drives?
[15:39:59] <Connor> http://www.ivdc.com/cnc/case2.jpg
[15:40:06] <Connor> http://www.ivdc.com/cnc/case3.jpg
[15:40:13] <archivist> Einar1, yes a switcher
[15:40:16] <Connor> I'll make panels to fill the holes..
[15:40:34] <Connor> and switches will be mounted on the panel.. the front door can came off if switches are too tall.
[15:40:56] <archivist> Einar1, but only because it is one I had around
[15:41:04] <Einar1> It's better to use just a transformer + diode bridge + capacitors. Usually cheaper too.
[15:41:20] <CaptHindsight> I have power on one disconnect for the mach3 stuff since when the PC shuts off or crashes it starts up the spindle :)
[15:41:58] <CaptHindsight> the other problem with USB and no watchdog
[15:41:58] <Einar1> Switchers does not handle overcurrent gracefully. The stepper driver is a PSU in itself.
[15:42:21] <zeeshan> einar
[15:42:23] <zeeshan> depends on the switch :P
[15:42:36] <archivist> a good switcher can deal with overloads
[15:42:55] <CaptHindsight> Connor: https://tinyurl.com/keumtsj do you have room for this?
[15:43:01] <Connor> Upper Left in case3.jpg is PC PSU, Lower Right is stepper PSU.. Unit at the top is the spindle speed control with reversing switch.
[15:43:09] <archivist> but there should be no overcurrent with a stepper system
[15:43:47] <Connor> I've got one of those on my spindle speed control.. the beige brick next to it..
[15:44:13] <zeeshan> damn it you have enough room for a disconnect switch
[15:44:15] <zeeshan> just throw one on
[15:44:16] <zeeshan> !
[15:44:38] <Connor> I'll have one for the coolant pump too.. (going to use a 120v to 12v brick)
[15:44:48] <Connor> zeeshan: I would need 2.
[15:44:55] <zeeshan> nooo
[15:44:58] <Einar1> If you account for it, that's true. But then you end up with a big PSU. It will work, but generally it is adviced against.
[15:44:59] <zeeshan> you can get auxillary contacts for it
[15:45:03] <zeeshan> to expand it
[15:45:05] <Connor> The spindle is on a seperate 120v feed
[15:45:14] <zeeshan> the disconnect switch is 3 phase
[15:45:18] <zeeshan> so you can use each pole for something
[15:45:40] <zeeshan> so you can use one pole for coolant, one for spindle, and 1 for power supply
[15:45:48] <zeeshan> cause theyre all 110v
[15:45:54] <zeeshan> you'd be breaking the hot
[15:46:17] <zeeshan> mine currently breaks 2 poles for the 220v vfd
[15:46:24] <Einar1> I'll be in the workshop until NSA get their proxy fixed ....
[15:46:25] <zeeshan> and 1 pole for the 110v related stuff
[15:48:34] <zeeshan> i think im gonna hook up wires for the lathe today
[15:48:39] <zeeshan> and get it running on one axis :D
[15:48:58] <archivist> Einar1, I cant see http://www.ivdc.com/cnc/case3.jpg
[15:49:13] <Connor> Eh?
[15:49:15] <archivist> so who broke the web
[15:49:26] <zeeshan> heaoheoaha
[15:49:27] <Connor> archivist What does it say ?
[15:49:50] <archivist> The server at www.ivdc.com is taking too long to respond.
[15:50:26] <Connor> what IP you coming from ?
[15:50:45] <archivist> look at my hostmask :)
[15:51:59] <archivist> probably some DDOS going on somewhere
[15:52:58] <Connor> try now and see
[15:53:04] <Connor> checking FW config
[15:54:16] <CaptHindsight> well the US blames it on the Chinese hackers
[15:55:20] <archivist> I saw some problems in another unrelated channel earlier
[15:56:16] <zeeshan> help
[15:56:19] <zeeshan> wipers for ways
[15:56:29] <zeeshan> do they go on once you've assembled whatever is riding the ways
[15:56:31] <zeeshan> or do you put em before?
[15:58:45] <archivist> the ones that hold grit for bed grinding?
[16:02:11] <zeeshan> no
[16:02:17] <zeeshan> they are on the cross-slide thing
[16:02:30] <zeeshan> and they wipe chips off the way
[16:03:20] <archivist> that is what they pretend to do :)
[16:07:09] <mozmck> Hmm, so is it best to remove the way wipes?
[16:08:04] <mozmck> I would think that would be worse (thinking of a lathe...)
[16:09:33] <archivist> the best is steel covers so nothing can ever get on the ways
[16:10:10] <mozmck> that would be hard to do on a lathe I would think.
[16:10:25] <archivist> my southbend had some of them still on when I got it but the bed has about 15 thou wear
[16:11:10] <mozmck> some steel covers? I have seen that on the cross slide, but not the long ways.
[16:12:47] <zeeshan> archivist: luckily bed wear isnt that big of a deal :P
[16:13:36] <archivist> it is a deal if doing long work
[16:13:49] <zeeshan> why?
[16:14:08] <archivist> does not turn parallel then
[16:14:08] <mozmck> taper
[16:14:08] <zeeshan> all it does is change the height of your tool
[16:14:38] <zeeshan> but you can always dial in your tail stock
[16:14:39] <zeeshan> :D
[16:14:57] <zeeshan> i guess it'd be a pain to offset it all the time
[16:15:03] <mozmck> as you turn the length of the bar :)
[16:15:19] <archivist> I wad adjusting the cross slide on one job
[16:15:21] <mozmck> http://www.metalworkingfun.com/showthread.php?tid=391
[16:15:23] <archivist> was
[16:20:14] <mozmck> Hmm, found several suppliers of way covers. http://www.gortite.com/telescopic-covers/telaflex-telescopic-steel-covers, http://www.buww.com/new_way_cover.html
[16:32:56] <zeeshan> when you're selecting wire size for power supplies, do you pick it on the in-rush current?
[16:33:01] <zeeshan> or based on the fact its a 600W supply?
[16:47:17] <CaptHindsight> maximum load
[16:47:44] <zeeshan> =D
[16:47:45] <zeeshan> sweet
[16:48:41] <CaptHindsight> you don't want the wires to melt under the worst conditions
[16:49:48] <CaptHindsight> if you're building the NEC, UL, CA spec then you follow their rules for wire sizing
[16:50:19] <CaptHindsight> there are UL guidelines for wiring inside of control cabinets
[16:54:08] <CaptHindsight> zeeshan: page 26 http://www.newark.com/pdfs/techarticles/eaton/Articles_White_Papers/Control_Panel_Design_Guide.pdf
[16:55:19] <zeeshan> =D
[16:55:20] <CaptHindsight> zeeshan: wiring for power starts on page 16
[16:55:32] <zeeshan> i love eaton's charts
[16:55:35] <zeeshan> simple to follow
[16:55:44] <zeeshan> thats cause they're written by non technical people
[16:55:45] <zeeshan> :D
[17:01:11] <Deejay> gn8
[18:01:16] <deMimsy_> anybody have a reference on creating a latch with hal pins?
[18:03:51] <deMimsy_> do i need to replicate an entire flip flop circuit, or is there a module
[18:03:52] <deMimsy_> ??
[18:05:38] <deMimsy_> oh look at that , there is a component called flipflop
[18:11:09] <deMimsy_> although the flipflop is a lot more intricate for my purposes...
[18:20:45] <andypugh> Am I not looking carefully enough, or is there basically no documentation for genserkins?
[18:27:20] <cradek_> you have to know to read about Denavit-Hartenberg parameters
[18:27:59] <andypugh> Even then, there is no real clue what pins it exports, and how they relate to Denavit-Hartenberg parameters.
[18:29:43] <cradek_> yeah - A, ALPHA and D aren't exactly self-documenting
[18:30:22] <andypugh> Wikipedia has d, theta, r, alpha. Genserkins has a, alpha, d, theta.
[18:30:56] <andypugh> So, perhaps a maps to r.
[18:31:39] <andypugh> it just seems like a slightly more verbose manpage at the very least would be useful, rather than a 4 line description in the geneic kins manpage
[18:32:35] <andypugh> (I am answering a forum post where someone wants to control a 3-axis polar device. Genserkins might work, but I don’t have docs to point him at)
[18:33:02] <cradek_> polar as in r theta z?
[18:33:26] <andypugh> Yes.
[18:33:56] <andypugh> But as his actual joints are polar, polar G-code is no help…
[18:34:07] <cradek> that's so trivial I'd really not use genserkins
[18:34:18] <andypugh> Nor would I.
[18:34:30] <cradek> genserkins is not known for its stability or ... testedness
[18:34:31] <andypugh> But trivial for you may not be trivial for hi,.
[18:34:53] <andypugh> (but it seems that genserkins isn’t trivial for anyone)
[18:35:04] <cradek> that's true
[18:35:19] <cradek> I have seen it work, but it always feels like it barely works
[18:36:15] <cradek> also, it takes a LOT of cpu
[18:36:46] <andypugh> Maybe there is enough stuff on the kins page to get him there, though a complete listing of the final bipodkins example wouldn’t hurt. It seems to end with “implementation details are trivial and left as an excercise”
[18:36:56] <cradek> we used a d525 on the american robot at mpm, and it barely worked, even with a slow servo thread
[18:38:03] <cradek> if you can't write the translations from rectangular to polar and back with some confidence, genserkins is going to be really hard to understand
[18:38:37] <zeeshan> isnt that as simple as multiplying by the homogenous transform matrix?
[18:38:46] <andypugh> For some people the maths is easy but writing and compiling code is hard. For some people the reverse applies.
[18:39:01] <zeeshan> how is that possible
[18:39:05] <zeeshan> :P
[18:39:11] <zeeshan> matrices are like arrays
[18:39:15] <zeeshan> do a couple loops and you solve em
[18:39:34] <zeeshan> unless youre trying to find unknowns, then you gotta bust out newton's method
[18:39:37] <zeeshan> or something similar
[18:40:08] <andypugh> zeeshan: It might well be, but (for example) I have no idea what the homogenous transform matrix is, and writing code in C to do what you describe woule be hard for me (easy in Matlab)
[18:40:31] <zeeshan> if you can do it in matlab
[18:40:37] <zeeshan> you're 75% there
[18:40:40] <andypugh> No.
[18:40:49] <andypugh> Matlab does it all by magic
[18:40:54] <zeeshan> well like matrix multiplication is really easy
[18:40:54] <cradek> rotatekins is an example that might help someone write polarkins
[18:40:57] <zeeshan> you just do A*B or something
[18:41:08] <zeeshan> but in c you'll need to do a loop
[18:41:11] <zeeshan> to multiply
[18:41:31] <zeeshan> i have all my notes on powerpoint slides
[18:41:33] <andypugh> Yeah, and A\B is truly magic in Matlab (least-squares solution of something just happens)
[18:41:34] <zeeshan> if you're interested
[18:41:39] <zeeshan> they're from a numerical methods class
[18:42:02] <zeeshan> A\B uses matrix inverse basically
[18:42:08] <andypugh> In Matlab you have to work to _prevent_ it from doing matrix multiplication.
[18:42:21] <zeeshan> .* :D
[18:42:58] <zeeshan> andypugh: if you're really trying to learn it
[18:43:12] <zeeshan> all introductory robot kinematics courses go over homogenous transform matrix
[18:43:26] <andypugh> But, we are not talking about you, or even me (I managed to skip matrices almost entirely throughout my education). We are trying to answer a question from a bloke on the forum.
[18:43:32] <zeeshan> one use of it is to convert from cartesian to polar
[18:43:55] <zeeshan> http://elvis.rowan.edu/~kay/papers/kinematics.pdf
[18:43:58] <zeeshan> give him a link to this
[18:43:59] <zeeshan> :D
[18:44:33] <andypugh> I have used the affine transform (and I almost ended up teaching a Matlab course). However what I wanted was a link to LinuxCNC docs that explain how to setup exisitng kins modules.
[18:44:52] <cradek> rotatekins is an example that might help someone write polarkins
[18:45:14] <cradek> that and the advice to use atan2 so your quadrants come out right without futzing
[18:45:17] <zeeshan> i hate linear algebra!!!
[18:45:53] <zeeshan> andypugh: apparently you can use matlab to controll steppers?
[18:45:55] <zeeshan> and servos
[18:46:07] <zeeshan> i've seen it done, just never knew how they were doing it
[18:46:10] <cradek> http://en.wikipedia.org/wiki/Polar_coordinate_system#Converting_between_polar_and_Cartesian_coordinates
[18:46:15] <zeeshan> simulink
[18:46:25] <cradek> here the math is spelled out very simply
[18:46:37] <andypugh> I have tried driving the parallel poer with the matlab driver. 6Hz!
[18:46:44] <zeeshan> haha
[18:47:27] <andypugh> VBA in Excel could do 10kHz. Except when it stopped for a bit to check email or tidy its sock-drawer or something.
[18:47:50] <zeeshan> have you played around with simulink?
[18:48:03] <andypugh> (Hollow laugh)
[18:48:24] <zeeshan> were using it for a controls class
[18:48:27] <zeeshan> i was kind of lost ;p
[18:48:48] <andypugh> I spend my working days poring over 40,000 pages of a mixture of Simulink and Ascet (depending on which supplier wrote that bit)
[18:49:02] <zeeshan> what do you do?
[18:49:19] <andypugh> I program vehicle ECus
[18:49:36] <zeeshan> very cool :D
[18:49:46] <zeeshan> <- hacks vehicle ecus
[18:50:03] <andypugh> It’s hard enough with the docs.
[18:50:20] <andypugh> I rather feel you will just break things without the docs.
[18:50:26] <zeeshan> its a long process
[18:50:37] <zeeshan> but i've been able to flash the fuel and ignition timing
[18:50:41] <andypugh> Yeah, it takes a dozen of us 3 years.
[18:50:50] <zeeshan> on a mitsuhishi eclipse ecu
[18:51:02] <andypugh> Ah, well, gasoline is fairly simple.
[18:51:24] <zeeshan> it was far from simple for me!
[18:51:55] * zeeshan bows to andypugh
[18:51:58] <zeeshan> master tuner
[18:52:12] <andypugh> It would be non-trivial to even find the maps in out ECU. The 2MB of ram is nearly full, and the 1Gz 3-core CPU is maxed out.
[18:52:34] <zeeshan> dude on my car theres like 10 ecus
[18:52:43] <zeeshan> it'd be REALLY cool to access all of them
[18:52:49] <zeeshan> so i can diagnose problems
[18:53:03] <zeeshan> the tool the dealer sells is like 4000$
[18:54:01] <andypugh> I only work in the powertrain control module. And I only really work on perpipheral systems (fuel pump control, oil pump control, coolant valve, and oil level sensor, other similar systems).
[18:54:16] <zeeshan> fak so you must know all about control theory
[18:55:00] <andypugh> You might imagine so, but actually I don’t. Our systems deviate from ideal systems so much that I am not sure that control theory is a huge help.
[18:57:40] <andypugh> With one system there is a PWM-controlled valve that varies the flow of the controlled fluid into a chamber on the pump that pumps that fluid that changes the pump stroke. The feedback is the ouptput pressure. The speed that the pump rotates at varies outside our control (at engine speed). And the viscolsity of the fluid is a strong function of temperature. Not your classical system.
[18:59:56] <Jymmm> I found a scope... http://www.dx.com/s/151298
[19:01:04] <andypugh> Cute. Have you seen: https://www.kickstarter.com/projects/920064946/oscilloscope-watch
[19:01:05] <zeeshan> hhighly nonlinear
[19:01:06] <zeeshan> :P
[19:01:48] <andypugh> Yes. P and D are the product of two 16x16 maps. I is the product of three.
[19:04:03] <andypugh> Anyway, I need to be asleep.
[19:26:36] <XXCoder1> drat
[19:26:42] <XXCoder1> somebody pinged me
[19:26:46] <XXCoder1> scrolled out of historuy
[19:27:36] <Jymmm> !
[19:27:51] <Jymmm> logger[mah]:
[19:27:51] <logger[mah]> Jymmm: Log stored at http://linuxcnc.mah.priv.at/irc/%23linuxcnc/2014-05-20.html
[19:28:05] <Jymmm> XXCoder1: there ya go
[19:28:09] <XXCoder1> thanks
[19:28:17] <Jymmm> np
[19:29:16] <XXCoder1> got it
[19:29:18] <XXCoder1> ich said hello
[20:58:25] <XXCoder1> wow quiet
[23:51:35] <CaptHindsight> tjtr33 http://www.pbclinear.com/ ever deal with them? They are out in Rockford