Back
[00:00:20] <JT-Shop> I think that is misworded
[00:02:17] <JT-Shop> I had a rather sucessful metal spinning today
[00:02:24] <tjb1> Ill try the L3, if not I will change the comp file
[00:02:41] <tjb1> What did you make?
[00:02:47] <JT-Shop> a cup
[00:02:57] <JT-Shop> with ruffles
[00:03:16] <JT-Shop> or a dish rather
[00:03:36] <tjb1> Do you have to use a form to do that?
[00:04:01] <JT-Shop> working on tools and technique more than anything
[00:04:11] <JT-Shop> yea, I'll get a photo of it
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[00:06:40] <JT-Shop> http://imagebin.org/237266
[00:08:41] <tjb1> Pretty cool
[00:09:12] <JT-Shop> thanks, that ain't the first one LOL
[00:09:28] <JT-Shop> getting better at reading the metal as I spin
[00:09:57] <Tom_itx> what you makin?
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[00:10:37] <Tom_itx> i guess it pays to read the scroll back
[00:11:17] <JT-Shop> well the plan is to spin a bullet shaped cap for a 105mm case to use as an urn for my neighbor
[00:11:56] <JT-Shop> well see if we get done before it is needed... otherwise he has been put on notice that a cardboard box will be used
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[00:12:12] <Tom_itx> heh
[00:12:36] <Tom_itx> workin kinda close to the spindle there to be spinnin metal
[00:12:43] <Tom_itx> it's gonna grow quite a bit
[00:13:12] <JT-Shop> http://imagebin.org/237269
[00:13:14] <tjb1> What is this
[00:13:15] <tjb1> http://imagebin.org/237245
[00:13:33] <JT-Shop> a kiln
[00:13:50] <JT-Shop> it will go to 2350F
[00:13:57] <Tom_itx> used as intended or for heat treat?
[00:14:25] <JT-Shop> pottery mostly, I thought I might want to use it for heat treating but it is too big
[00:15:01] <JT-Shop> it's brand new, I've only warmed it up once...
[00:15:09] <Tom_itx> heh
[00:15:19] <Tom_itx> is pottery still popular?
[00:15:31] <Tom_itx> it was here for a while and kinda died off
[00:15:44] <JT-Shop> dunno, you can also slump bottles in there
[00:16:53] <JT-Shop> that still ain't a good photo of the spun part
[00:17:56] <tjb1> http://www.rainymood.com/
[00:18:42] <JT-Shop> raining here
[00:19:54] <tjb1> Isn't going to rain here for probably another 3-4 months
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[00:20:15] <JT-Shop> http://imagebin.org/237270
[00:20:30] <JT-Shop> damn phone is dusty
[00:20:40] <tjb1> Should probably answer your phone more often
[00:20:45] <tjb1> 40 missed calls
[00:20:53] <JT-Shop> 48
[00:21:37] <Tom_itx> same guy keep calling?
[00:21:39] <Tom_itx> :)
[00:21:39] <JT-Shop> know what the thing on the keyboard is?
[00:21:51] <tjb1> You knapp that yourself?
[00:22:07] <tjb1> A horn for your viking helmet?
[00:22:07] <JT-Shop> no, I make the tools for a buddy
[00:22:21] <JT-Shop> he made me a knife for my efforts
[00:22:33] <JT-Shop> that's a knapping tool
[00:23:16] <Tom_itx> lord knows you take enough naps
[00:23:33] <tjb1> I took a nap in a treestand today
[00:24:09] <JT-Shop> never have enough naps
[00:24:21] <tjb1> Where you finding all the horns?
[00:24:27] <tjb1> I havent seen a deer with horns in years lol
[00:24:30] <JT-Shop> Gary
[00:24:38] <Tom_itx> probably in his back yard
[00:24:58] <JT-Shop> Gary has a tote box full of them
[00:25:14] <JT-Shop> there too
[00:25:27] * Tom_itx goes for a shower
[00:25:55] <JT-Shop> thank goodness... it was getting a bit rough here
[00:27:46] <tjb1> I have a feeling when I buy that intel d525 im gonna have problems all over again
[00:28:33] <tjb1> Anyone happen to know if normal PCI cards fit on that mobo?
[00:29:21] <JT-Shop> card not cards
[00:29:41] <JT-Shop> depends on your case really
[00:30:36] <tjb1> http://www.newegg.com/Product/Product.aspx?Item=N82E16811352009
[00:32:06] <tjb1> Hell some of them cost more than the board
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[00:51:54] <Tom_itx> ahhh much better
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[01:11:32] <Loetmichel> tjb1: ONE
[01:11:49] <tjb1> ?
[01:12:06] <Loetmichel> ONE PCI card
[01:12:12] <Loetmichel> fits on the D525
[01:13:47] <Loetmichel> and for casings: "when there is a Will, there is a way" as we say in germany.
[01:14:13] <Loetmichel> and so my CNC cpu is inside an old 80286 "pizzabox" case:
[01:14:26] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=12265
[01:14:32] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=12250
[01:14:38] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=12247
[01:14:59] <Loetmichel> and its not an mini-itx, its a flex-atx board ;-)
[01:15:23] <Loetmichel> (OK, the cpu fan is a press fit under the hood ;-)
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[03:35:26] <skunkworks> yikes
[03:35:28] <skunkworks> http://www.youtube.com/watch?v=Dd_M6Li_OrA&feature=share&list=ULDd_M6Li_OrA
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[03:44:09] <cradek> http://www.youtube.com/watch?v=E3AqIZURMbI
[03:44:30] <cradek> that's cute and all, but you're spending like 5% of the time cutting
[03:46:24] <cradek> oh ok, it gets better later.
[03:47:35] <toastydeath> whoever was programming this didn't pay attention to the checkboxes in mastercam
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[03:53:09] <Tom_itx> that looks like a fadal. no audio here so i'm not sure if they said
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[03:55:05] <Tom_itx> they used surfcam
[03:55:25] <Tom_itx> i kinda like surfcam but i've never used it
[03:55:25] <Tom_itx> a bud of mine had it and used it
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[03:57:45] <r00t4rd3d> http://i.imgur.com/3uhsV.png
[03:58:07] <r00t4rd3d> i can run ubuntu on my phone :/
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[04:01:16] <Tom_itx> i haven't seen a fadal yet that would last cutting steel, let alone at those speeds
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[04:06:40] <tjb1> r00t4rd3d: arent you speshul
[04:07:22] <r00t4rd3d> do that on your iphone
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[04:09:09] * Tom_itx looks at his flip phone and wonders where to try and load it
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[04:13:44] <skunkworks2> alex_Joni, did you get it?
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[06:10:53] <TkTech> That's some commit activity right there.
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[06:18:43] <tjb1> Want a challenge? Portal 2...
[06:18:54] <tjb1> r00t4rd3d: already did
[06:19:47] <TkTech> Channel in what way? To mill a stage?
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[06:19:50] <TkTech> *Challenge
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[07:00:16] <tjb1> 5-6 hours to beat portal 2
[07:00:31] <TkTech> Bah, easy.
[07:00:41] <TkTech> Have you seen some of the speedruns? Insanity.
[07:02:23] <tjb1> No, i was having trouble on some that were stupid simple
[07:02:39] <tjb1> That one you had to use all 3 gels…it was pretty hard
[07:05:19] <tjb1> night all
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[07:09:01] <r00t4rd3d> http://allthingsd.com/20121126/the-galaxy-camera-a-better-android-based-camera-but-a-big-commitment-%E2%80%A8/
[07:09:13] <r00t4rd3d> want
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[07:22:38] <TkTech> I'm still holding off for the lens to shrink dramatically.
[07:23:02] <TkTech> Until them might as well spend the extra $300 and get a good used DSLR like the D9000 and buy a decent lens.
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[07:55:11] <DJ9DJ> moin
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[08:42:19] <abetusk> archivist, ping
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[10:18:28] <Loetmichel> mornin'
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[14:14:51] <JT-Shop> I think I got it... save the subs to a file and use program_open(file.ngc) to load the file
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[14:53:07] <alex_joni> skunkworks: hey
[14:53:33] <skunkworks> Hi alex - how is it going?
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[15:11:17] <alex_joni> pretty busy sam ;)
[15:11:28] <alex_joni> just got back from london, heading to germany early tomorrow
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[15:19:40] <archivist> abetusk, been laid down with a dose of the flu, just ask your questions, any of the others can answer too
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[15:20:18] <FinboySlick> archivist: Get better soon.
[15:20:56] <abetusk> archivist, no question. I wanted to say that I owe you an apology. Sorry for being dismissive the other day. The problem turned out to be precisely backlash. After readjusting the backlash nut things got a lot better. Also, thank you
[15:21:58] <archivist> abetusk, your'e welcome
[15:26:18] <Jymmm> s/dismissive/abusive/ 2¢
[15:30:03] <FinboySlick> Jymmm: Egos always rise when a man's tools are questioned.
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[15:30:40] <Jymmm> FinboySlick: (no comment)
[15:30:59] <cradek> abetusk: I'm glad you got it figured out and I appreciate your class.
[15:31:37] <cradek> abetusk: that previous conversation looked like a lot of misunderstanding to me.
[15:31:38] <FinboySlick> Jymmm: Hehe, that's sort of how I meant it.
[15:33:31] <Loetmichel> archivist: i wish you well, also flu-stricken compadre ;-)
[15:33:46] <Jymmm> FinboySlick: Eh, I've tossed in my 2¢ and nobody wants (to hear) the other 98¢, so I'm just going to let dead dogs lie.
[15:34:56] <FinboySlick> Jymmm: I don't have an opinion on the matter as I didn't witness any of it. I'd likely have strong bias towards archivist though simply because he's awesome.
[15:35:20] * Jymmm hands FinboySlick a rag
[15:35:22] <archivist> dunnoboutdat
[15:35:46] <Jymmm> FinboySlick: You have something brown on your nose ;)
[15:36:21] <Jymmm> archivist: Eh, you're a pita, but you aint too shabby =)
[15:37:26] <Jymmm> (kettle,pot,color_of_choice)
[15:37:34] <FinboySlick> Jymmm: You will be assimilated in the archivist fanclub.
[15:38:05] <Jymmm> FinboySlick: As long as I don't have to move to UK, just too damn wet
[15:38:21] <Jymmm> for me
[15:38:38] <FinboySlick> Jymmm: If you work hard enough on propaganda, we might let you run the US branch.
[15:40:08] <Jymmm> FinboySlick: I'd much rather head up the Tropical Island Branches
[15:40:29] <FinboySlick> That sort of climate will rust your machines.
[15:41:04] <Jymmm> FinboySlick: See, that would be my first priority, passing along pevention to all those areas.
[15:43:10] <Loetmichel> FinboySlick: where i have to write in für the AFC?
[15:43:13] <Loetmichel> ;-)
[15:44:30] <FinboySlick> archivist: Can you feel the love yet?
[15:45:06] * archivist cough's and splutters
[15:45:22] <FinboySlick> OMG, it's comming out its nose!
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[15:48:34] * Loetmichel sounds like a tracked vehicle at the moment, too
[15:48:58] <Loetmichel> but the state with the spitting is already gone, the coughing is dry now ;-)
[15:50:30] <Loetmichel> ouch... (ever had sore muscles from COUGHING? ... please dont make me laugh again...)
[15:52:26] <archivist> I have a run out of cough sweet error, I shall have to go out to the shops
[15:52:40] <archivist> at least past the headache stage
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[17:12:38] <r00t4rd3d> I just tried to cut some aluminum and my .0625 end mill was all over the place then snapped :(
[17:12:58] <r00t4rd3d> my first broken but
[17:13:00] <r00t4rd3d> bit
[17:15:12] <Tom_itx> spindle not rigid enough?
[17:17:39] <r00t4rd3d> probably not
[17:17:52] <r00t4rd3d> i need a better z axis setup
[17:18:10] <Loetmichel> r00t4rd3d: as long as you havent had to pull the bits out of your skin... BTDT ;-)
[17:18:15] <Loetmichel> with a 2mm TC bit
[17:18:31] <Loetmichel> @ 24krpm
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[18:00:35] <IchGuckLive> Hi All B)
[18:01:22] <IchGuckLive> after another 4hr of soldering on the servo driver no movement :(-
[18:01:29] <IchGuckLive> :-(
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[18:20:42] <skunkworks> ? replacing all the componants?
[18:22:02] <IchGuckLive> my first servo system
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[18:27:22] <icee> Loetmichel: ick.. i hate exploding tools :P
[18:27:46] <IchGuckLive> it happens icee
[18:28:00] <IchGuckLive> skunkworks: are you around europ
[18:28:29] <skunkworks> no
[18:28:36] <skunkworks> us
[18:28:45] <Loetmichel> icee: noting bad happened. just a bit of plucking wit tweezers to get the shards out of my face... (lucky me, i wear (acrylic) reading glasses ;-)
[18:29:53] <Loetmichel> the most work was to identify the Tungsten carbide shards between all the hair ;-)
[18:31:27] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=11846 <- "is that a beard hair or a shard? *pull* OUCH! ... a hair" ;-)
[18:32:50] <archivist> dremel winding beard around the chuck is interesting
[18:33:30] <Loetmichel> archivist: it is?
[18:33:44] <Loetmichel> i would think the dremel just stops...
[18:33:58] <Loetmichel> knowing MY beard hair at least ;-)
[18:35:19] <archivist> well the dremel starts running up towards you, you need the presence of mind to fight back and grab the chuck and stall it
[18:35:40] <Loetmichel> archivist: ok... never had that long a beard
[18:36:34] <Loetmichel> but were standing at the lathe wit THIS hair some decades ago:
http://www.cyrom.org/palbum/main.php?g2_itemId=2835
[18:37:00] <Loetmichel> ... yeas, taht IS me some twenty years ago (sleeping ;-)
[18:38:31] <Loetmichel> http://www.cyrom.org/palbum/main.php?g2_itemId=2812&g2_imageViewsIndex=1 <- when i was still blonde, not grey ;-)
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[18:44:00] <Loetmichel> ... my supervisor (what is the word for a man who supervises a bunch of workers in a workshop?) wasnt amused to see me turning metal on a big lathe with a belt-long open ponytail ;-)
[18:45:39] <archivist> supervisor==boss
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[18:47:37] <Loetmichel> no, not boss of the company. in german this man is called "meister" because he has a special training to lead and work his job.
[18:48:00] <Loetmichel> isnt there a similar position in english/american companys?
[18:48:49] <IchGuckLive> MOTOR TURNES YIPPY
[18:50:00] <pcw_home> so you bargain drive now has $2000 of labor invested :-)
[18:50:29] <IchGuckLive> it makes at power on 10 turnes and goes error
[18:50:44] <Loetmichel> pcw_home: as always. thats called "hobby" ;-)
[18:51:00] <IchGuckLive> trying to localise the error
[18:51:06] <Loetmichel> IchGuckLive: dc servo?
[18:51:12] <pcw_home> ;-) well 10 turns is better than none
[18:51:28] <IchGuckLive> it is so bad as i cand astablish a com connection
[18:51:31] <IchGuckLive> Loetmichel: AC
[18:51:44] <Loetmichel> then: switch two if the motor cables
[18:52:09] <Loetmichel> direction of encoder and direction of drive are wrong
[18:52:36] <Loetmichel> in most cases with this behaviour
[18:52:53] <IchGuckLive> let me find tha alarmcosde
[18:54:28] <IchGuckLive> Position Error Pulse Overflow
[18:57:41] <markvandenborre> if I wanted to buy a ready-made cnc that works with my debian desktop, what would I choose?
[18:58:32] <IchGuckLive> how mutch woudt you spend
[18:58:35] <markvandenborre> (I need at least a 70x50 cm surface)
[18:58:50] <IchGuckLive> markvandenborre: wood
[18:58:52] <markvandenborre> and I want to be able to cut baltic birch plywood
[18:58:58] <markvandenborre> 18mm thick
[18:59:10] <markvandenborre> maybe some aluminium, but that's not a priority
[18:59:35] <markvandenborre> IchGuckLive: what should I spend?
[18:59:47] <markvandenborre> 3d would be enough, 5d not necessary
[18:59:48] <IchGuckLive> where are you US europ ?
[18:59:52] <markvandenborre> .eu
[19:00:01] <IchGuckLive> im in Germany
[19:00:05] <markvandenborre> cool
[19:00:59] <markvandenborre> so essentially, a machine that does at least this, works with my debian desktop, and low maintenance
[19:01:03] <IchGuckLive> http://www.ebay.de/itm/CNC-Wood-Engraving-Machine-Engraver-Cutter-Router-1312-50-x47-2-2KW-spindle-/120833940263?pt=LH_DefaultDomain_0&hash=item1c22439b27
[19:01:23] <IchGuckLive> this gives you a start
[19:03:58] <IchGuckLive> markvandenborre: cand you build your own
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[19:04:33] <markvandenborre> IchGuckLive: no, I don't have the ambition to build my own
[19:04:55] <markvandenborre> I do software, and some prototyping
[19:05:21] <IchGuckLive> the 700x500 is not quite comen
[19:06:20] <markvandenborre> IchGuckLive: I realise that
[19:06:43] <IchGuckLive> it is like a real CNC
[19:07:16] <IchGuckLive> Hobby mashines by manafuctue dont fit this
[19:07:34] <IchGuckLive> http://www.cnc-shop.mobasi.com/Fraesmaschinen/OPTI-F-40-E-Bohr-Fraesmaschine-mit-Schaltgetriebe-und-12-Geschw::143.html
[19:08:06] <awallin> beware of VAT and customs and shipping though when buying from china
[19:08:16] <IchGuckLive> https://www.wabeco-remscheid.de/index.php?cat=c10000_Fr--smaschinen.html&showCategories
[19:08:17] * markvandenborre knows all about it
[19:08:32] <awallin> a 12keur machine ends up costing closer to 18k delivered with VAT and customs and shipping
[19:08:41] <IchGuckLive> markvandenborre: the last ones are in Remscheid
[19:08:41] <FinboySlick> And also make sure the machine and the inspection sheet match.
[19:08:59] <FinboySlick> In my case, Chen was a big fat liar ;)
[19:09:07] <markvandenborre> FinboySlick: you mean, check something on delivery?
[19:09:25] <FinboySlick> markvandenborre: Including tolerances, yes.
[19:09:27] <markvandenborre> or check that what you bought online matches with what you receive?
[19:09:40] * markvandenborre is not an expert
[19:10:05] <markvandenborre> frankly, I'd rather pay a bit more and buy something decent quality
[19:10:12] <FinboySlick> markvandenborre: I'm not either, but I learned that one the very disappointing and hard way.
[19:10:37] <FinboySlick> markvandenborre: Price isn't the matter here, i did pay extra for fancy.
[19:10:48] <FinboySlick> It was just fancy *and* crooked.
[19:11:09] <IchGuckLive> here is the Mercedes of the Chineese Manufactures
[19:11:12] <IchGuckLive> http://www.cncmakers.com/cnc/controllers/CNC_Milling_Machine/
[19:11:51] <awallin> my friend bought a "BLIN" from china.. I guess it's ok but not spectacular
[19:11:54] <FinboySlick> IchGuckLive: Those look pretty darn nice.
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[19:12:10] <awallin> http://www.blinmachinery.com
[19:13:08] <IchGuckLive> and here are the Russians direct in german stoch buy and GO
[19:13:11] <IchGuckLive> http://www.knuth.de/produktuntergruppe,13.html
[19:13:34] <IchGuckLive> FinboySlick: they got so nice Turret indexer i got 4 of them
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[19:15:09] <FinboySlick> IchGuckLive: Once I get around to fixing mine, it'll probably be very nice.
[19:15:44] <IchGuckLive> save the link
[19:15:56] <markvandenborre> thx for the hints
[19:16:20] <IchGuckLive> NP
[19:16:20] <FinboySlick> I probably just need to find a good bridgeport. Pretty much all the parts of my machine fit within the travel distance of a BP.
[19:16:29] <FinboySlick> So I could get it straightened up that way.
[19:16:49] <IchGuckLive> FinboySlick: are you in europ
[19:16:59] <markvandenborre> thx for the hints
[19:17:05] <markvandenborre> will be back later I suppose...
[19:17:22] <FinboySlick> IchGuckLive: I'm in nowhereland Canada. Between New Brunswick and NovaScotia.
[19:17:41] <IchGuckLive> oh there are not many mashines used around
[19:17:53] <IchGuckLive> all will keep them to the last minute
[19:17:58] <FinboySlick> IchGuckLive: I really just need to borrow some time on one.
[19:18:04] <IchGuckLive> or last CHIP O.O
[19:18:06] <FinboySlick> I don't need to own it.
[19:18:26] <FinboySlick> The important bit is that it be run by someone who knows what they're talking about.
[19:19:06] <FinboySlick> Heh, I wish I could bring my machine to Keith... He'd fix me up good.
https://www.youtube.com/user/KEF791
[19:19:13] <IchGuckLive> FinboySlick: Stone metalwork got 2 mills
[19:19:40] <IchGuckLive> Edgewoth street New Brunswick
[19:19:51] <FinboySlick> IchGuckLive: You mean for sale?
[19:20:18] <IchGuckLive> no if you want to use one
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[19:20:45] <FinboySlick> IchGuckLive: I can probably find one much closer than that.
[19:20:47] <IchGuckLive> Nastus Brothers in Van Dyke avenue have also one
[19:21:14] <FinboySlick> IchGuckLive: New Brunswick is a whole province, I'd need the city name with those streets ;)
[19:21:37] <FinboySlick> But don't worry about it.
[19:21:45] <FinboySlick> There's a few machine shops around here.
[19:21:49] <IchGuckLive> there is also a cnc service in mactaquac
[19:22:18] <IchGuckLive> So if there are mashienes around you go there and get into ther business involved
[19:22:37] <IchGuckLive> im off By
[19:22:44] <IchGuckLive> Till tomorrow
[19:22:47] <FinboySlick> IchGuckLive: Seeya.
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[20:29:08] <FinboySlick> https://i.chzbgr.com/completestore/12/11/16/8CxdbqYLUkKAKfk0iK1RDA2.jpg
[20:32:29] <JT-Shop> http://imagebin.org/237365
[20:32:51] * JT-Shop understands more today than yesterday about metal spinning
[20:33:17] <jdh> me too
[20:33:31] <jdh> yeserday, I didn't know it existed.
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[20:35:13] <JT-Shop> LOL
[20:36:10] <FinboySlick> JT-Shop: What are yo making? That far one looks like a mangled beercap but the first one is pretty close to an alarm bell.
[20:36:28] <awallin> looks like you just ate some pie... :)
[20:36:41] <JT-Shop> just practice parts, no real parts yet...
[20:37:02] <FinboySlick> That's pretty sturdy gage for practice.
[20:37:08] <JT-Shop> some day I want to spin a copper bullet shape to cap off a 105mm shell casing
[20:38:29] <JT-Shop> if you mean the purple spots that is alcohol abuse from a little spilt vino
[20:38:59] <JT-Shop> it's 25 gauge steel sheet removed from a water heater
[20:40:25] <awallin> PCW: I would have some fpga-questions. can I e-mail you? tech "at" mesanet.com ?
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[20:42:42] <PCW> yeah
[20:43:37] <awallin> ok, good. It'll maybe take until tomorrow, I'll do some research and googling...
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[20:53:28] * Loetmichel fährt die kiste jetzt mal runter, macht ein image, bügelt es auf den neuen PCH und tauscht dann... cul8ter
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[21:01:37] <andypugh> FinboySlick: Technically Alcohol is _not_ a solution. It may be a Solvent.
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[21:02:25] <andypugh> I will grant that booze is generally a solution.
[21:03:58] <FinboySlick> andypugh: Do you really want to argue technicalities with a cat wearing glasses and a bow tie?
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[21:07:32] <andypugh> Well, I would assume that any cat so attired would like to have his facts right.
[21:08:26] <FinboySlick> andypugh: That'd be way cooler than a presidential debate.
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[21:53:15] <MercuryRising> So I'm going through the setup of Linux CNC, connected to a HobbyCNC controller board, I have the pinouts defined correctly, and I'm on a Desktop with a parallel port, Using LinuxCNC 10.04, and I'm testing my motors out (I think they're wired correctly, at least they're the same as they say they should be on the sheet), but when I try to Jog the axes, the motors just hum
[21:53:31] <MercuryRising> if I pulse the jog quickly, I can get some movement, but they mainly just sit there and make noise, instead of moving
[21:54:18] <cradek> possibly your acceleration or velocity settings are too optimistic for the motors to follow
[21:54:38] <MercuryRising> any idea what would be good test values?
[21:55:03] <MercuryRising> I've run through .1 - 1.5 on velocity, they just hum at different frequencies
[21:55:27] <cradek> unless you have the scale set properly, those numbers don't mean very much. what is your scale?
[21:56:09] <MercuryRising> 4000 steps / inch
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[21:56:37] <cradek> have you tried different accelerations?
[21:56:37] <andypugh> Accelleration numbers?
[21:56:52] <andypugh> (I was quicker, cradel can spell better)
[21:57:11] <MercuryRising> yes, switching motor steps/rev to 10 instead of 200 let's them move choppily!
[21:57:16] <MercuryRising> accel is 30 in/s
[21:57:53] <cradek> 30 inch/s2 means accel to full speed (.1 inch/s) in 1/300th second
[21:58:08] <cradek> your motors possibly can't do that
[21:58:21] <cradek> experiment with lower accels
[21:58:53] <MercuryRising> alright, awesome!
[21:59:20] <MercuryRising> messing with these values won't damage my motors or board, will it?
[22:01:25] <cradek> no, if your numbers are wrong, they'll just fail to turn correctly
[22:03:43] <MercuryRising> sometimes they sound pretty nasty. But, they run now! How easily should I be able to stop the movement of the motor with my hand? they are 305 oz-in motors, but barely pressing them makes them seize
[22:04:15] <MercuryRising> .25" bore
[22:04:19] <andypugh> voltage?
[22:04:33] <cradek> steppers get weaker the faster you try to make them go.
[22:04:36] <MercuryRising> input to the driver board is 24 volts
[22:05:13] <andypugh> OK, just wondering if you had made the mistake of using the "nameplate voltage" which is probably about 2V
[22:05:40] <andypugh> See how much torque there is at about 100rpm.
[22:06:45] <MercuryRising> how do i make it run at a specific rpm?
[22:07:11] <cradek> math
[22:07:43] <cradek> there are 200 steps per rev, and you've got revs/inch and inches/second
[22:08:12] <MercuryRising> is 200 steps per rev a good value? is it pretty standard for steppers?
[22:08:13] <cradek> well with your microstepping you might have a different number of steps per rev
[22:08:26] <MercuryRising> micro is set to 1:1 for the moment
[22:08:33] <cradek> it's rare to find anything other than 200
[22:08:53] <cradek> full stepping can be much weaker than half or microstepping
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[22:09:00] <cradek> suggest trying 1/2 or 1/4
[22:09:17] <MercuryRising> alright, will do
[22:09:35] <cradek> errr I meant you've got steps/inch and inches/sec
[22:09:43] <MercuryRising> the disadvantage to more microstepping is more processing power to compute travel?
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[22:10:20] <cradek> it's the maximum rate of software step generation twiddling your parallel port
[22:10:20] <DJ9DJ> gn8
[22:10:48] <cradek> it's sort of like processing power, I guess. more like latency. there's only so fast it can go and still make nice even pulses
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[22:14:23] <cradek> bbl.
[22:14:55] <MercuryRising> alright, thanks for the help!
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[22:33:46] <icee> hmm? torque decreases when you microstep
[22:34:56] <icee> things get much smoother and nicer
[22:35:11] <icee> you tend not to get (much) more actual resolution/accuracy either
[22:35:25] <PCW> Torque per ustep does stall torque does not
[22:35:50] <icee> PCW: sure, and hten you get a lag proportional to whatever the torque needed to actually dynamically budge the machine is
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[22:36:52] <PCW> Yep, you still have a 50 pole motor and the torque vs displacement is not changed by the ustep ratio
[22:38:10] <icee> stall torque is the same; microstep torque is low; torque @ speed may be lower or the same
[22:38:34] <PCW> and the torque is roughly sinusoidal so there a 'flat spot' in the torque around the current rotor position
[22:38:35] <PCW> regardless of how fine you can set the magnetic rotor position
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[22:39:13] <PCW> If you have feedback you can improve this somewhat
[22:39:48] <icee> the flat spot may not be really flat though.. it may be a flat positive or negative value because of detent torque
[22:40:34] <icee> yah, but if you have feedback, you should just be using a real servo :)
[22:40:59] <PCW> Well detent torque is usually a small fraction of stall torque so you can do pretty well with light loads
[22:41:27] <icee> sure, the detent torque is just one of the big factors preventing you from getting additional real resolution from microstepping
[22:41:52] <icee> meh
[22:41:55] <icee> everything is hard and nothing works
[22:41:59] <PCW> You can make a real servo with a step motor, but its usually not worth it
[22:42:48] <PCW> (more complicated drive electronics than a 3 phase)
[22:42:50] <PCW> but better low speed torque (50 poles)
[22:43:09] <icee> and more weird nonlinearities from all those poles
[22:43:28] <PCW> doesnt matter much with feedback
[22:43:44] * icee shrugs
[22:44:05] <icee> limits how much gain you can have
[22:44:08] <icee> i dunno
[22:44:22] <icee> stop being optimistic
[22:44:25] <icee> everything is broken and too hard
[22:44:25] <icee> ;)
[22:44:30] <PCW> there are a number of commercial step motor servos so they must work pretty well
[22:45:24] <PCW> unstallable, high low speed torque (avoid gearing) but expensive complicated drive
[22:45:58] <PCW> (unstallable in the step motor sense)
[22:54:49] <JT-Shop> if you just installed the 8.04 livecd is there any reason to not just jump to 2.5?
[22:56:31] <PCW> the buildbot makes it so it should be OK
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[23:14:25] <andypugh> I saw an interesting motor today on youtube. Apparently there are some enormous flat brushless motors used on direct-drive washing machines. They look very useful.
[23:14:56] <JT-Shop> you can't have mine, the wife is still using it :)
[23:15:11] <andypugh> https://www.youtube.com/watch?v=6LjuZsod4E4
[23:15:52] <JT-Shop> youtube ads suck
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[23:21:52] <JT-Shop> I actually spun a shallow dish from steel today
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[23:39:52] <Tom_itx> andypugh, are they fisher and packyl? sp may not be right...
[23:41:08] <Tom_itx> lots of ppl are converting those to wind generators
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[23:41:44] <andypugh> He calls it "F & P" in another video, so quite possibly.
[23:42:19] <Tom_itx> http://www.thebackshed.com/Windmill/fp2a.asp
[23:42:41] <Tom_itx> i'm rather sure of it
[23:43:05] <andypugh> The stator from an LG is here, looks potentially very interesting. Direct drive lathe maybe?
http://www.ebay.co.uk/itm/LG-Washing-Machine-WH12311FD-Stator-Direct-Drive-/321028588392?pt=UK_Home_Garden_Kitchen_Washing_Machines_Dryers&hash=item4abecb8368
[23:45:15] <Tom_itx> http://www.thebackshed.com/Windmill/assembly.asp
[23:45:40] <Tom_itx> looks similar except maybe they spin the magnets instead of the wire
[23:46:36] <Tom_itx> or is the LG just part of the rotor assembly?
[23:46:40] <Tom_itx> maybe that's it..
[23:48:00] <andypugh> The LG part is a stator
[23:50:38] <Tom_itx> dude i know in Au made a windmill from one
[23:50:50] <Tom_itx> worked good until a storm came along and took the blades off
[23:51:13] <Tom_itx> they rewire em for 3 phase iirc
[23:51:27] <andypugh> They look marvellously useful for any number of such projects.
[23:51:40] <andypugh> They would be three-phase originally.
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[23:51:56] <Tom_itx> i forget what they do exactly but they reconfigure the windings somehow
[23:51:58] <andypugh> (Brushless motors)
[23:52:52] <Tom_itx> http://www.thebackshed.com/Windmill/assembly1.asp
[23:52:56] <Tom_itx> that shows it
[23:53:35] <JT-Shop> my favorite tune the theme song from Secret Life of Machines is playing
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