#linuxcnc | Logs for 2012-08-09

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[00:02:24] <r00t4rd3d> Where is the subscription shit? Why is it not in my profile?
[00:02:29] <r00t4rd3d> wtf
[00:03:12] <r00t4rd3d> that is a bullshit thing to do to people
[00:09:05] <jdh> relax
[00:10:42] <r00t4rd3d> ill relax when the auto sub and email is off my shit
[00:11:40] <jdh> Post-subscription checked by default? Initial/default value: Yes
[00:12:32] <r00t4rd3d> atleast let the user change this
[00:12:51] <r00t4rd3d> person pet peeve
[00:14:11] <r00t4rd3d> i changed my email to emc-board@lists.sourceforge.net
[00:14:55] <r00t4rd3d> now I am going to reply to every post on the forum
[00:15:01] <r00t4rd3d> :)
[00:15:18] <jdh> hey, you should just not pay them until they change all teh defaults to your liking.
[00:16:11] <r00t4rd3d> that is just a forum setting you let people choose
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[00:22:55] <r00t4rd3d> i find it od that im the first person to complain about this?
[00:23:13] <r00t4rd3d> no other notes in Using this Forum sub about it :/
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[00:26:13] <r00t4rd3d> took me 2 months to finally get an account registered and 1 post to make me regret the effort.
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[01:10:13] <jdh> The slitting saw cut quickly with fluent swarf without burr, is easy to operate.
[01:12:32] <Tom_itx> got a pic of your saw setup?
[01:12:48] <Tom_itx> i have an arbor for some on my sherline but i haven't used them yet
[01:13:08] <jdh> don't have one. Was looking... ran across that description
[01:22:31] <jp_> any of you guys think an arduino would serv as a good microstepping controller?
[01:26:36] <jdh> and drive a pair of h-bridges?
[01:26:53] <jp_> you got it
[01:27:11] <jdh> you can, but why?
[01:27:56] <jp_> high current cheap drive
[01:28:10] <jdh> vs. a tb6560?
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[01:28:26] <jp_> what current will it do
[01:28:41] <jdh> 3amps per phase?
[01:28:43] <jdh> maybe 2.5
[01:28:47] <jp_> then yes
[01:28:50] <jp_> 12A
[01:28:59] <jdh> that's a lot of stepper.
[01:29:12] <jp_> yes it is
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[01:30:45] <jdh> sounds good to me.
[01:30:53] <Tom_itx> logger[mah]
[01:30:53] <logger[mah]> Tom_itx: Log stored at http://linuxcnc.mah.priv.at/irc/%23linuxcnc/2012-08-09.html
[01:32:05] <Tom_itx> jp_ what's this going on?
[01:33:15] <jp_> nothing as of right now just an idea
[01:33:40] <jp_> just want a drive thats capable of 10A or so
[01:33:51] <Tom_itx> why so much?
[01:34:10] <Tom_itx> the gecko 203v goes to 7A
[01:36:04] <jp_> i know i dont want a gecko
[01:36:30] <jp_> if i just went out and bought one what would be the fun in that
[01:36:48] <jdh> yep.
[01:37:16] <jp_> this way ther will most likely be some smoke and fireworks
[01:37:53] <Tom_itx> i had fun making the supply and control box for one
[01:38:14] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/cnc/psu/psu_index.php
[01:38:45] <Tom_itx> i should get about 18A from that supply
[01:41:52] <jp_> it would be nice to come up with a one size fits all microstepping drive
[01:42:34] <jp_> theres some nice h-bridges out ther now that can help make that happen
[01:43:06] <Tom_itx> allegro makes some
[01:49:15] <jp_> i have some samples on the way SMT though
[01:49:52] <jp_> Thank god the heat sink pad is on the top of the chip
[01:49:54] <Tom_itx> make sure you get a good thermal contact on the center pad
[01:50:05] <Tom_itx> it's not on the bottom?
[01:50:15] <Tom_itx> it must be tqfp or such then
[01:50:19] <jp_> 12A RMS 24 A Peak
[01:50:31] <Tom_itx> qfm etc all have bottom center pads
[01:50:52] <jp_> it's a weird one BSSOP
[01:51:08] <Tom_itx> you realize you gotta get the heat away from it
[01:51:20] <Tom_itx> or it won't perform like that
[01:51:25] <jp_> yes
[01:51:42] <Tom_itx> the leads probably won't handle that current
[01:52:22] <jp_> im sure it will its rated for it
[01:52:42] <Tom_itx> there are to220 mosfets rated for 50A too
[01:52:47] <jp_> why make something rated for it if it will just burn and die
[01:52:53] <Tom_itx> no way the leads will take that
[01:53:19] <jp_> 50A RMS?
[01:54:09] <jp_> or 50A peak
[01:54:41] <Tom_itx> http://www.digikey.com/product-detail/en/AUIRF1405/AUIRF1405-ND/3455111
[01:54:45] <Tom_itx> 75A
[01:54:50] <jp_> I put 2000 amps thru 10Ga every day but not Continously
[01:54:50] <Tom_itx> 220 package
[01:57:31] <jp_> @ max allowable junction temp so just keep it cool
[01:59:22] <jp_> LN2 cooled!!! LOL
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[02:03:45] <jp_> so do you think the arduino is up to acting as a L297?
[02:03:59] <jdh> sure, but so is an l297
[02:04:57] <jp_> true but i was think of playing with high micro-stepping
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[02:16:55] <jp_> anyone here using linuxcnc to drive your 3d printer?
[02:17:47] <Tom_itx> i don't think many use it for that
[02:18:43] <jp_> I thought it would be a natural fit for long time users
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[02:33:47] <uw> nope
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[02:47:57] <skunkworks__> there are a few using linuxcnc on their 3d printers
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[02:54:59] <uw> for whatever reason
[02:56:50] <skunkworks__> ?
[02:57:39] <jp_> working on building a 3d printer right now
[02:58:14] <jp_> I plan to use linuxCNC
[02:58:59] <uw> anybody with a laser cutter?
[02:59:16] <jp_> theres been a few
[02:59:27] <uw> looking to get a case cut
[02:59:59] <jp_> no job shops around your area
[03:01:43] <jp_> i have a waterjet job shop around the corner from me 30$ to cut a strip off of a 1" granite counter top
[03:01:47] <uw> i dont think any that have a laser cutter. http://www.thingiverse.com/thing:25100
[03:02:28] <jdh> I'd like one of those cases.
[03:02:51] <jp_> cool!!
[03:02:54] <uw> yea the guy wont make it with out the stupid logo on the bottom
[03:03:10] <skunkworks__> http://www.youtube.com/watch?v=EKjKfyxD79E
[03:03:15] <jdh> wonder if I could just cut something similar on my router.
[03:04:02] <uw> i was thinking of puting one on my mill. but id have to redo it to offset for the bit. then the light tubes need to be deltwith and all
[03:05:01] <uw> would be terrible, but it would surely be easier for someone with a laser machine
[03:06:12] <jdh> there's a dxf on the page. I'll try cutting one out of .25" hdpe this weekend if teh weather sucks.
[03:07:11] <skunkworks__> http://www.youtube.com/watch?v=433l5AjHtVc
[03:07:12] <uw> nice if it works out let me know
[03:08:13] <skunkworks__> http://www.youtube.com/watch?v=F6WnkmzP1ZY
[03:08:32] <jdh> I think it might rely on the 90degree cuts to stay together
[03:09:24] <jp_> skunkworks: Ive seen those just wondering if anyone here had one
[03:09:54] <uw> yea because of the interior fillets that would be created, you might have to do some afterward touchups with a file or something
[03:10:09] <jdh> the dxf is all splines
[03:10:45] <skunkworks__> awallin started one.
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[03:11:41] <jp_> i should hopfully have the mechanics done this weekend
[03:12:02] <jp_> just working on the extruder right now
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[03:13:16] <uw> oh stupid pycam
[03:14:02] <skunkworks__> awallins - http://youtu.be/pqOsQmvupdM
[03:14:42] <skunkworks__> I think he didn't do much with it. too busy
[03:16:25] <jp_> http://www.youtube.com/watch?v=OiN8wNyLdTI&feature=related
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[05:55:49] <Loetmichel> mornin'
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[06:02:43] <uw> HELLO
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[06:49:55] <DJ9DJ> moin
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[13:17:46] <joe9> when I do "Open File" in Axis GUI, it shows me the directory in "PROGRAM_PREFIX". Is there anything I can do to make it show the current directory of the "current open file"?
[13:17:56] <joe9> I know I can change the directory.
[13:18:22] <joe9> but, just curious, if there is a method to do so automatically.
[13:20:40] <archivist> fix the source
[13:26:32] <cradek> yeah there's not a config option for that
[13:29:17] <archivist> were old P3's ok , I have just tested one with about 14000 jitter and only 260meg of ram!
[13:30:49] <Jymmm> archivist: Yeah, just had to find one without onboard anything
[13:31:36] <Jymmm> Even if you disabled in BIOS, sometimes with jump latency up for some reason. *shrug*
[13:31:47] <Jymmm> s/with/would/
[13:32:21] <archivist> these are old Compaq deskpro, I got 4 about a year ago
[13:34:14] <Jymmm> What I found worked well is having keystick on the controller, then remote the gui to another box
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[13:36:27] <Jymmm> Then you can run emc on windows even =) (freak everyone out!)
[13:38:16] <jdh> I haven't had much luck running axis remotely.
[13:38:45] <Jymmm> jdh: use a crossover cable?
[13:39:20] * jdh looks at Jymmm.
[13:53:50] <joe9> archivist: cradek: thanks. let me check the source.
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[14:06:59] <cradek> I always had good luck with P3s and still have a dual P3-1000
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[14:21:10] <Jymmm> I think I got rid of all of my P3's finally
[14:24:54] <joe9> jdh: i run axis remotely. works fine for me.
[14:25:00] <Jymmm> I need t find a ide/sata transitional 1U PS one o these days
[14:25:11] <Jymmm> s/o/of/
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[14:46:43] <pcw_home> Wonder if the latency test can be made more realistic...
[14:47:33] <archivist> yes your email made me wonder a bit
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[14:49:51] <pcw_home> I suspect (but do not know) that the problem is that the latency test doesn't actually do anything
[14:49:53] <pcw_home> (that is it does no I/O that might be blocked by shared hardware)
[14:51:27] <archivist> or its timing mechanism is delayed as well so fails to see an error
[14:53:09] <archivist> I was thinking yesterday about documentation for spindle input on parallel port should include leeway for latency errors
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[14:57:09] <pcw_home> The situation I was testing is detected by LinuxCNC (real time errors) but these are not reflected at all in the latency test ( at least for the servo thread I will try the base thread today)
[15:00:23] <pcw_home> so all this really means is that the latency test is not a good indicator of actual servo thread jitter performance (a motherboard with ~3 times worse servo thread numbers in the latency test is actually more than 5X better than a n Atom motherboard )
[15:02:17] <cradek> pcw_home: is it someting in your servo thread before motion?
[15:13:54] <pcw_home> its the standard HM2 example file modified for the 5I25 let me take a look
[15:17:57] <pcw_home> addf hm2_[HOSTMOT2](BOARD).0.read servo-thread
[15:17:58] <pcw_home> addf motion-command-handler servo-thread
[15:18:00] <pcw_home> addf motion-controller servo-thread
[15:18:01] <pcw_home> are the first lnes
[15:18:23] <cradek> pretty sure that's right
[15:18:40] <cradek> can you monitor between each of those somehow?
[15:18:51] <awallin> could one do a "loopback" latency test where one IO pin outputs an edge when the thread runs, and another IO pin is used to measure the edge. Would this catch the real-time errors you are seeing? Or is an external oscilloscope or freq-counter required?
[15:18:53] <cradek> maybe one of them sometimes runs a long time
[15:20:32] <pcw_home> My WAG is that I/O access is blocked by video DMA
[15:21:25] <pcw_home> (jitter is noticeable worse when moving windows around)
[15:21:36] <cradek> hm.
[15:22:29] <pcw_home> awallin: Linuxcnc catches the errors but the latency test does not
[15:22:58] <cradek> that's why I'm suspicious of the zillion lines of code that run before that test checks the clock
[15:23:20] <cradek> but if moving windows changes it, you're probably right
[15:24:55] <pcw_home> Unless theres some other shared resource locking causing the trouble (but its motherboard specific)
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[15:43:34] <Jymmm> pcw_home: WAG?
[15:45:21] <Jymmm> Wrestling Aquatic Gophers?
[15:45:25] <pcw_home> Wild Ass Guess?
[15:45:28] <archivist> wives and girlfriends
[15:45:29] <Jymmm> ah
[15:46:29] <Jymmm> archivist: may neither of them ever meet =)
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[16:06:22] <L84Supper> AMD supports coreboot for all their chipsets since the 7xx, Google posted support for the Intel Sandybridge
[16:07:27] <L84Supper> if you're using a mainboard with a closed BIOS or EFI you're really just counting on luck that it works
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[16:11:55] <L84Supper> AMD G series boards with SB8xx + coreboot have jitter ~10K with onchip GPU
[16:12:28] <pcw_home> Latency test jitter? I dont trust that anymore ;-)
[16:14:06] <skunkworks> pcw_home, I suppose you cannot test latency with a plugged in video card?
[16:14:15] <skunkworks> (I still buy pci ones...)
[16:14:47] <pcw_home> Yes I can try that (the Jetway has 2 PCI slots and one PCIE slot)
[16:14:59] <skunkworks> it would be interesting if it is still a shared memory issue - just not noticed as much...
[16:15:16] <pcw_home> Might well be
[16:15:58] <L84Supper> I only use servos, so I don't have any feedback for stepper applications
[16:16:10] <L84Supper> no pun intended
[16:16:48] <pcw_home> I always wondered why people started having troubles above 1 KHz servo thread (with Atom MBs)
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[16:17:07] <pcw_home> AMD may have the same issue
[16:17:46] <pcw_home> I'll have to try one of those Hudson Mini ITX MBs
[16:17:46] <skunkworks> well - I have had issues with faster base threads - I thought I narrowed it down to classic ladder in my situation.. (THe K&T has a pcie video card)
[16:18:28] <pcw_home> A 'scope is a pretty hard to fool latency tester
[16:20:44] <pcw_home> 6KHz servo thread is fine on my slow Core Duo (2180?) with sserial (I think 8 -10 KHz is possible without)
[16:20:50] <L84Supper> http://www.asrock.com/mb/overview.asp?Model=E350M1 has a coreboot patch
[16:20:56] <L84Supper> if they are still shipping
[16:22:36] <L84Supper> http://www.newegg.com/Product/Product.aspx?Item=N82E16813157228&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-NA-_-NA
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[16:23:24] <skunkworks> pcw_home, http://thread.gmane.org/gmane.linux.distributions.emc.user/32990/focus=33075
[16:35:24] <pcw_home> Yes I remember going through that (also with danimal with a Atom MB) and could not see any reason for it (but the scope does)
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[16:56:01] <IchGuckLive> Hi all
[17:01:02] <IchGuckLive> http://www.ebay.de/itm/myTEC-28-03-1-2-70-Hydraulic-Expansion-End-Mill-Holder-HSK-C-32-Taper-/380454178226?pt=BI_Tool_Work_Holding&hash=item5894d60db2 Hydraulik tapper for 30USD
[17:03:34] <jdh> what does one do with it?
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[17:25:35] <Jymmm> jdh: fast tool changes?
[17:25:38] <faofao> bonjour, je voudrais échanger en français sur linuxcnc avec une machine CNC HEIZ highZ S1000/T. Qui est intéressé?
[17:26:29] <IchGuckLive> faofao: parlevou englais
[17:27:28] <IchGuckLive> Parlez-vous anglais
[17:27:33] <faofao> mon anglais est scolaire, donc minimum
[17:27:33] <IchGuckLive> B)
[17:27:52] <IchGuckLive> se petit anglais
[17:28:18] <faofao> ya, very small
[17:28:28] <IchGuckLive> thats ok
[17:28:33] <IchGuckLive> im from Germany
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[17:28:40] <IchGuckLive> at the french boarder
[17:29:25] <faofao> is there a chat for french
[17:29:45] <IchGuckLive> no
[17:30:45] <faofao> you know machine heiz (german machine)?
[17:30:53] <IchGuckLive> ce qui est difficile, sans traduction française
[17:30:57] <IchGuckLive> que
[17:31:10] <IchGuckLive> oui
[17:31:46] <Jymmm> IchGuckLive: kiwi!!! ;)
[17:32:03] <IchGuckLive> French
[17:32:04] <faofao> I search to define my machine with linuxcnc
[17:32:20] <IchGuckLive> is it a paper cutter
[17:32:34] <Jymmm> IchGuckLive: No, .NZ
[17:32:35] <IchGuckLive> as heiz made this
[17:32:39] <Jymmm> IchGuckLive: =)
[17:32:40] <faofao> je cherche à configurer ma machine sous linuxcnc
[17:33:13] <IchGuckLive> un port parallèle
[17:33:26] <faofao> oui
[17:33:28] <IchGuckLive> qui pilote
[17:34:01] <IchGuckLive> Je pense que moteur pas à pas
[17:34:06] <faofao> faiseuse pour usiner le bois et aussi aluminium
[17:34:27] <faofao> oui moteur pap nanotec
[17:34:41] <IchGuckLive> Nema23
[17:35:07] <IchGuckLive> http://de.nanotec.com/schrittmotoren.html
[17:35:56] <IchGuckLive> breakoutboard sorcière
[17:36:31] <IchGuckLive> onne chine
[17:36:39] <IchGuckLive> Bonne
[17:37:01] <faofao> ça veut dire quoi cette phrase "breakoutboard sorcière"
[17:37:30] <IchGuckLive> The parport PCB for connecting the Stepper drivers
[17:37:45] <faofao> comprends pas "onne chine" ni "bonne"
[17:37:51] <alex4nder> haha
[17:38:05] <IchGuckLive> Je parle aussi le français rien de bon
[17:38:09] <awallin> hm, nokia selling qt...
[17:38:35] <jdh> sold
[17:39:03] <IchGuckLive> faofao: querry
[17:39:03] <faofao> on s'égare, revenons à linuxcnc
[17:39:43] <IchGuckLive> pas que nous sommes tous le droit
[17:39:55] <faofao> que veut dire querry
[17:40:12] <IchGuckLive> faofao: we need to know your mashine configuration bevor we can help you #
[17:41:05] <IchGuckLive> faofao: there is another chat window open that i connected you private
[17:41:16] <alex4nder> en anglais ou GTFO
[17:41:22] <faofao> CNC -highZ S1000/T de cnc Technik/HEIZ
[17:42:16] <faofao> motorisation 4 moteurs de chez Nanotec pap avec 1600 pas/rotation
[17:42:28] <IchGuckLive> oui
[17:42:35] <faofao> 2moteurs sur l'axe X
[17:42:52] <IchGuckLive> et où est le problème
[17:43:56] <faofao> vous me demandez la config de ma machine, alors je commence
[17:44:00] <IchGuckLive> Hal pin ?
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[17:45:11] <IchGuckLive> faofao: pastebin the Hal Config please
[17:45:20] <faofao> hal pin? je n'en suis pas là
[17:45:30] <faofao> je fais comment?
[17:46:06] <IchGuckLive> then see the iintegrator manual
[17:46:40] <IchGuckLive> sans que la configuration est pour le disque dur
[17:47:23] <faofao> j'ai l'impression de vraiment débuter, aussi je reviendrai quand je saurai mieux me débrouiller avec le tchat et linuxcnc, bye...
[17:48:14] <IchGuckLive> encore bonne soirée
[17:48:26] <faofao> je vais aller faire un tour sur le site de nanotec que vous m'avez envoyé, thanks
[17:48:38] <IchGuckLive> NP
[17:48:49] <IchGuckLive> You are Wellcom
[17:49:17] <IchGuckLive> B) accueil
[17:50:13] <IchGuckLive> Vous pouvez passer un signal en parallèle sur deux broches du port
[17:51:04] <IchGuckLive> ok folks French sesssion completed lets start english
[17:51:11] <IchGuckLive> B) O.O
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[17:51:31] <IchGuckLive> i can see the French boarder from my window
[17:52:29] <IchGuckLive> Problem wars beside the English how to get 2 Steppers for the X axis on one mashine
[17:53:32] <IchGuckLive> 8025 is this alu profile ?
[17:53:41] <IchGuckLive> in the USA
[17:53:52] <Jymmm> IchGuckLive: When you see the whites of their eyes... FIRE!
[17:54:05] <Jymmm> 80-20.net
[17:54:11] <IchGuckLive> thanks
[17:54:14] <syyl> i would start firing even before, Jymmm
[17:54:20] <syyl> just to be sure
[17:54:36] <Jymmm> syyl: Nah, gott give em a sporting chance.
[17:54:41] <syyl> nope
[17:54:54] <syyl> just a matter of firepower ;)
[17:54:56] <IchGuckLive> Jymmm: no ww beond this adress
[17:55:16] <Jymmm> It's just deer hunting... give the deer a rifle too! make it a challenge =)
[17:55:30] <syyl> ok, i will take an howitzer..
[17:55:45] <IchGuckLive> syyl: there is a small town in texas <100 peopöle that claim more firerpower then Luxemburg
[17:55:49] <Jymmm> http://www.8020.net/
[17:55:58] <IchGuckLive> B)
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[18:06:57] <ssi> how much firepower does luxembourg have?
[18:07:25] <syyl> not enough?
[18:08:08] <IchGuckLive> O.O
[18:08:20] <ssi> clearly ;)
[18:09:52] <ssi> man I want a laser really bad... I'm starting to get the itch to spend money
[18:10:00] <ssi> but I know it's going to be a huge expenditure and I'll probably regret it :P
[18:10:58] <IchGuckLive> lasercutter ß
[18:11:03] <IchGuckLive> ??
[18:11:08] <ssi> yeah
[18:11:12] <ssi> like to do 60 or 80W
[18:11:13] <IchGuckLive> or laser engrave
[18:11:23] <ssi> well what most folks call an "engraver"
[18:11:27] <ssi> but I want to cut thin plywood and acrylic
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[18:11:43] <ssi> from what I've read, 60W will cut 3/4 acrylic reasonably well
[18:11:46] <IchGuckLive> why not start with a waterjet
[18:11:53] <ssi> "start" with a waterjet
[18:11:54] <ssi> heh
[18:12:02] <ssi> waterjet is probably more difficult to diy
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[18:12:21] <IchGuckLive> it is proven and relyable technik
[18:13:12] <ssi> has anyone done a cheap homebuilt waterjet?
[18:13:14] <ssi> I've never seen one
[18:13:22] <IchGuckLive> ok im off for today the USA leads only on the USA gold Chart not in the worldchart china claims more glden USA counts all medels
[18:13:30] <ssi> need high pressure pump and expensive nozzle and all kinds of crap
[18:13:38] <ssi> whereas a 60W lasertube can be had for $400
[18:13:58] <IchGuckLive> ok y<ou try we look
[18:14:16] <IchGuckLive> and learn from your faulths
[18:14:54] <IchGuckLive> lasertube cooling is a big issue
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[18:15:08] <ssi> for a low power laser it's a pretty easily solved issue
[18:15:34] <ssi> for 60W you can get away with a small water pump... bigger lasers, use a chiller. Chillers aren't all that expensive
[18:15:38] <ssi> not compared to 25kpsi water pumps :P
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[18:17:34] <Loetmichel> re @ home
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[18:31:35] <Jymmm> If you are 0ging to make your own CO2 laser, don't do anything less than 100Watts
[18:32:07] <Jymmm> or the max your 120VAC outlet can handle =)
[18:33:28] <Jymmm> and you'll need two 15A+ circuits... one for the laser, another for the pump/chiller and blower
[18:33:46] <Loetmichel> Jymmm: hmmm
[18:34:04] <Loetmichel> the 80W co2 tube a friebn had had not sooo much power input.
[18:34:51] <Loetmichel> laser. servos, fans, PC, cooling, all on one 230V 16A outlet, and no problems with overload whatever.
[18:34:55] <Loetmichel> friend
[18:42:54] <Jymmm> Loetmichel: 220 np, I said 120VAC =)
[18:43:01] <Loetmichel> i see
[18:43:11] <Loetmichel> you and your toy supply ;)
[18:43:46] <Jymmm> 120@15A == 1800W, 220@15A == 3300W
[18:44:00] <Loetmichel> 230/16
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[18:44:04] <Loetmichel> =3650
[18:44:07] <Loetmichel> W
[18:44:09] <Loetmichel> ;-)
[18:44:10] <Jymmm> whatever
[18:45:34] <Jymmm> and its probably not a good thing to have a blow motor on the same circuit as the laser
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[18:52:20] <cpresser> Jymmm: why not?
[18:52:25] <cpresser> i use the same setup
[18:54:42] <Jymmm> inductive motor + electronics not a good thing.
[18:55:16] <Loetmichel> Jymmm: hmm?
[18:55:21] <Loetmichel> why that?
[18:55:29] <Jymmm> brown outs
[18:55:31] <cpresser> the motor has a cap, and the electronics use switchin mode PSUs
[18:55:39] <Loetmichel> are your electronics not capable of handling spikes?
[18:57:05] <Jymmm> brown outs can create "defects" in engraving
[18:57:46] <archivist> only if your psu's are poor
[19:01:09] <Loetmichel> archivist: i second that
[19:02:57] * cpresser will monitor DC ripple and see for himself
[19:04:35] <ssi> I don't run anything on 120v if I can help it :P
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[20:42:21] <alex4nder> fuck
[20:42:23] <alex4nder> er
[20:42:37] <alex4nder> it's too damn hot.
[20:43:00] <Tom_itx> how hot is too hot?
[20:43:50] <alex4nder> 84 degrees.
[20:43:57] <alex4nder> I live in central california for a reason.
[20:44:11] <Tom_itx> it's only Temp: 93.0 F (33.9 C) here atm
[20:44:19] <alex4nder> haha
[20:44:27] <Tom_itx> just finished a bike ride downtown and back
[20:44:46] <DJ9DJ> gn8
[20:44:55] <alex4nder> night
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[20:54:47] <JT-Shop> cooled off here... it's only 95F
[20:55:27] <Tom_itx> JT-Shop did you see my touch probe youtube?
[20:56:08] <JT-Shop> no
[20:56:12] <micges> I don't know what is better, here is middle of summer and we have 57F :|
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[20:56:26] <Tom_itx> http://www.youtube.com/watch?v=SGuV86Su430&feature=youtu.be
[20:56:51] <Tom_itx> that a part i found in my drawer we used to run on the little Okuma Kadet
[20:56:56] <Tom_itx> stainless
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[21:01:50] <Jymmm> Tom_itx: how much play is there in your touch probe?
[21:04:17] <skunkworks> what do you mean by play?
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[21:25:15] <archivist> PCW, I just looked at the timediff hal comp that latency test uses, seems to only check jitter from the last cycle so a slow drift wont be noticed
[21:26:39] <archivist> possibly..... if Im reading it right
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[21:33:21] <PCW> archivist: It might be interesting to hack some I/O code or memory block transfer into the latency test to see if it "sees" the real jitter
[21:35:35] <archivist> it compares this cycle with the last so a number of positive changes below the current maximum positive may not be seen so not updating jitter
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[21:40:35] <PCW> Ahh
[21:41:05] <archivist> are you reading the c too :)
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[21:41:34] <PCW> not at the moment
[21:41:45] <archivist> timedelta.c line 171 on
[21:41:58] <archivist> well on the old copy here
[21:43:28] <archivist> I would call the current code a cycle to cycle jitter test not peak jitter test
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[22:12:42] <JT-Shop> Tom_itx, did you indicate it after the probe?
[22:22:18] <Tom_itx> i really need to get a proper probe
[22:22:25] <Tom_itx> but i wanted to try it out
[22:24:17] <JT-Shop> how well do you think it measures?
[22:25:10] <Tom_itx> i'm not real pleased with the ball bearings / dowel pins as contact surfaces
[22:25:24] <Tom_itx> they need to be plated or use something different
[22:25:44] <Tom_itx> i had quite a bit of varying resistance when i measured it with the meter
[22:25:48] <JT-Shop> too much resistance?
[22:26:03] <Tom_itx> yeah it was pretty high
[22:26:09] <JT-Shop> maybe more spring pressure?
[22:26:16] <Tom_itx> i considered that
[22:26:22] <Tom_itx> i have more springs or i can wind another one
[22:26:55] <Tom_itx> i've never wound a push spring, just pull but it's probably the same idea
[22:27:33] <JT-Shop> yea just need space between each coil
[22:27:40] <Tom_itx> it's an experiment that could have had better results
[22:28:08] <JT-Shop> what voltage is going through the pin ball circuit?
[22:28:19] <Tom_itx> 5v
[22:28:34] <Tom_itx> well, ground completes the path
[22:28:49] <Tom_itx> but open is an open 7i43 pin
[22:28:51] <JT-Shop> I wonder if a higher voltage would work better
[22:29:02] <Tom_itx> not for very long :)
[22:29:28] <Tom_itx> i could add a debounce line to it probably too
[22:29:28] <JT-Shop> well with an isolation circuit....
[22:29:35] <Tom_itx> that helped the limit switches alot
[22:30:00] <JT-Shop> time to fetch some chow from town before the cocina closes
[22:30:14] <Tom_itx> part of the problem is the accuracy i was able to make the center piece that holds the 3 dowel pins
[22:30:31] <Tom_itx> if i had a 4th axis i could have gotten them alot closer
[22:31:56] <Tom_itx> mine's in the oven
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[22:40:47] <Jymmm> Maybe use inductance instead of resistance
[22:42:12] <Jymmm> probe has a magnet on one end, and surrounded by coil(s), then just measure the change in iductance caused by the movemnt of the magnetic field.
[22:42:35] <Jymmm> no contact to be plared
[22:43:06] <Jymmm> plated
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[22:45:26] <Jymmm> though I don't know if ferrious metals being probed could be shielded in just jogging the probe in place
[22:45:39] <Jymmm> (false positives)
[22:49:27] <jdh> we should outlaw alcohol.
[22:49:52] <jdh> [wrong chan]
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[23:22:09] <skunkworks__> yay - finally 14mbs. (was getting by with 1)
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