#linuxcnc | Logs for 2012-09-16

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[00:00:39] <andypugh> JT-Shop: Not sure, mine is a different make
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[00:04:07] <JT-Shop> ok, I'll just mess with the conf file till it works
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[00:10:23] <JT-Shop> I had to swap X and Y, no wonder I thought it didn't work at first I was touching a file on the desktop on the left side and the mouse pointer was on the right side
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[00:49:02] <jp_> how can i make the jog speed slider in axis more sensitive?
[00:49:30] <jp_> ask my wife perhaps?
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[01:03:10] <Tom_L> change the ini settings in [DISPLAY]
[01:04:53] <Tom_L> those should do it
[01:04:58] <Tom_L> 1 being 100%
[01:06:18] <jp_> That Just sets the range. My problem is with the mouse ithe slider is just to coarse
[01:06:32] <Tom_itx> mmm
[01:06:37] <Tom_itx> not sure about that
[01:06:45] <Tom_itx> it would be in the axis settings though
[01:06:49] <Tom_itx> for the slider
[01:07:07] <jp_> dam extruders move to slow
[01:07:25] <Tom_itx> use your arrow keys or +- whichever controls it
[01:07:27] <Tom_itx> i forget
[01:09:07] <JT-Shop> jp_: you can't control the slider sensitivity
[01:09:33] <jp_> I thought that might be the answer
[01:09:45] <Tom_itx> wrong answer :(
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[01:14:15] <JT-Shop> you can move it with the keyboard in increments of 10 from 0 - 100
[01:14:50] <JT-Shop> or connect up a mpg
[01:15:01] * Tom_L hugs his mpg
[01:15:14] <Tom_L> that's got to be the best thing i added to my sherline
[01:15:26] <Tom_L> aside from linuxcnc of course
[01:15:41] <jp_> Sorry the JOG SPEED Slider
[01:16:32] <Tom_L> change the ini settings if it's too fast
[01:17:24] <JT-Shop> jp try the , and . keys
[01:18:03] <jp_> yeah but still jumps from 23mm/m to 83mm/m
[01:18:35] <jp_> ill just have to change the ini and live with the fact i loose some of the top end
[01:20:09] <JT-Shop> why do you need fine control for jog speed?
[01:21:17] <jp_> Dam extruder runs aroind 30-40mm/s
[01:22:03] <jp_> while the rest of the machine can do like 1000 times that
[01:22:21] <jp_> Well not a 1000 but you get the idea
[01:22:49] <JT-Shop> so you want to jog the extruder?
[01:23:24] <jp_> yeah its handy and in MDI it's annoying
[01:23:37] <JT-Shop> make a pyvcp button and use halui to jog the extruder
[01:23:46] <jp_> true
[01:25:30] <JT-Shop> say goodnight Gracie
[01:26:08] <jp_> goodnight Gracie
[01:26:25] <Tom_L> later JT-Shop
[01:32:35] <JT-Shop> touch screen calibrated time to waddle back to the house
[01:32:38] <JT-Shop> goodnight
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[02:31:36] <r00t4rd3d> Arrrrrrrrrrrrrrr!
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[03:07:36] <tjb1> http://www.cnczone.com/forums/attachment.php?attachmentid=167485&amp;d=1347761850
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[03:21:37] <pana> nice.
[03:22:10] <pana> cncrouterparts for the trucks and stuff?
[03:27:13] <skunkworks__> mach 4 lite is out? http://www.cnczone.com/forums/automation_technology_products/162843-mach4-lite_software_ethernet_smoothboard_screw.html
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[03:55:39] <tjb1> sorry pana, yes its the cncrp design carriages
[03:55:46] <tjb1> I actually made the ones pictured though
[03:58:32] <tjb1> hey r00t4rd3d cad makes it look small doesnt it?
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[04:20:33] <SavageSimian> any solidworks gurus here? i'm a noob trying to cut a hole in a nonplaner surface and i'm a little stumped.
[04:22:34] <Tom_itx> SavageSimian, did you get that link?
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[04:28:38] <tjb1> Need to find a way to set up my homing sensors...
[04:29:03] <SavageSimian> to home in on what?
[04:30:21] <tjb1> ??
[04:30:44] <SavageSimian> kidding. sorry.
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[04:35:04] <pana> I built mine from there parts last christmas.. Wish I had a little more knowledge when I did, as I could have saved some cash.
[04:36:04] <tjb1> i only saved $60 making 6 of them myself and I didnt have to buy the aluminum either
[04:36:24] <pana> it kinda looks like you used finelineautomations plans though
[04:36:47] <pana> just used steel instead of alum lower frame
[04:36:58] <tjb1> i took a lot of ideas from a lot of plans
[04:37:23] <pana> best way to get where needed
[04:37:38] <tjb1> i workedo n the design for about 6 months
[04:38:09] <tjb1> Its my senior project so I had a lot of time to refine the design
[04:38:21] <pana> looks good. are you worried about the lower frame shaking from rapid motion?
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[04:38:46] <tjb1> no
[04:38:49] <tjb1> its pretty heavy
[04:39:04] <tjb1> still a 600# water table coming
[04:39:23] <pana> my lower table is made from 4x4 frame with 3/4" particle board top and lower shelf. I still get shaking
[04:39:37] <pana> plasma cutter?
[04:39:42] <tjb1> and router
[04:40:53] <pana> hope it all works out for you then
[04:41:41] <tjb1> What did you face your spoil board with?
[04:41:53] <pana> I need to setup a video camera on mine so I can watch it fromt he comfort of my living room :)
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[04:42:08] <tjb1> I looked at lowes but didnt seen any big cutters that would work for facing
[04:42:29] <pana> 3/4" mdf double layer. trammed the top layer with a mortise bit
[04:42:36] <pana> 1 1/4" round
[04:42:59] <pana> I've done them with a 3/4" round mortise bit as well
[04:43:04] <pana> takes a while
[04:43:32] <tjb1> Mine would take forever haha
[04:43:57] <pana> I just recently changed from a bosch colt to a PC690 which allowed me to change to a 1/2" shaft and larger router bits
[04:44:25] <pana> true, but only need todo it very seldom
[04:44:34] <tjb1> what hp is that?
[04:44:53] <pana> seems to me 1 1/4 or 1/2
[04:45:03] <tjb1> Im going to be using a dewalt 611
[04:45:11] <pana> quieter than the bosch
[04:45:12] <tjb1> Only 1/4" collet but 1.25 hp
[04:45:35] <pana> get a precise bit's set of collet's
[04:45:47] <tjb1> You can get 1 1/4 for 1/4" shank?
[04:45:56] <pana> they are worth the extra money
[04:46:00] <pana> hell no
[04:46:30] <tjb1> Didnt think so :P
[04:46:35] <pana> 3/4 I used on the bosch with 1/4" max.. PC690 has 1/2, 1/4 and 1/8 collet's from PB.
[04:47:03] <tjb1> yeah 3/4 would take a while
[04:47:25] <pana> 50x46 only takes a couple of hours
[04:47:33] <tjb1> inch?
[04:47:38] <pana> yep
[04:47:49] <tjb1> Mine will most likely be 48x96
[04:47:56] <tjb1> just because of 4x8 mdf :)
[04:48:25] <pana> seems to me, that speciallty plywood places can order slightly larger sizes
[04:48:59] <pana> I don't know how much larger though
[04:49:19] <tjb1> Doubt I would ever use a 5x10
[04:49:37] <tjb1> It might never see routing either
[04:49:43] <pana> still 48x96 is a great size. full sheet of ply on it
[04:50:21] <pana> I'm starting to look at purchasing longer rails for mine so I can go a full 96"
[04:51:33] <pana> tired of cutting ply on the table saw into smaller pieces and then cutting on the router table.
[04:51:44] <tjb1> I lost a damn impossibly small turnbuckle for the rack and pinion on the cncrp
[04:51:56] <tjb1> I can not find a turnbuckle that small anywhere
[04:52:50] <pana> mcmaster carr?
[04:52:54] <tjb1> I did find one at lowes small enough I could probably cut another 1/2 off it
[04:53:09] <tjb1> I havent talked to Ahren yet to see how much a new one would be….probably $.75
[04:53:33] <pana> yeah and he's pretty good about parts
[04:54:13] <tjb1> well its $1.12 at mcmaster
[04:54:17] <pana> I got a bad thrust bearing due to some large steel pieces crushing it during shipping and a cracked bearing.
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[04:54:41] <pana> replaced the thrust and gave me a complete 10 pack of bearings
[04:54:42] <tjb1> You can not beat mcmaster
[04:54:49] <tjb1> Nice
[04:54:57] <pana> I can't order from them as I'm in Canada.
[04:55:29] <tjb1> I went to lowes to get some SHCS
[04:55:39] <tjb1> $1.20 each for 5/16-18 x 21/2"
[04:55:41] <pana> pretty penny :)
[04:55:46] <tjb1> Its $9 for 25 at mcmaster
[04:55:56] <tjb1> thats 2-1/2"
[04:56:28] <tjb1> Even with the $5 shipping its still cheaper for me
[04:56:34] <pana> I ended up getting a commercial account at some bolt supply places where I live so I could afford all the bolts necessary :)
[04:56:54] <tjb1> The only places around me are fastenal and lowes
[04:57:06] <tjb1> I havent tried fastenal but I doubt they are any better
[04:57:19] <pana> a little. not much
[04:57:32] <tjb1> They did want $60 for a reamer...
[04:58:49] <pana> anyways, nice chatting. time for bed as I've got some cutting todo tomorrow
[04:58:58] <tjb1> goodnight
[04:59:11] <tjb1> I need to go too, gotta get the rack on tomorrow and figure out how to mount homing sensors
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[06:52:43] <DJ9DJ> moin
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[08:05:05] <L33TG33KG34R> hello guys
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[11:08:43] <Guest81629> Can anyone give me some direction on configuring a minimum speed for a pwm controlled spindle? My spindle ranges from 0-20000, but needs to be at least at 7000 to start turning... I've looked at the nist-lathe example but it does not seem to have the droids I'm looking for...
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[11:16:08] <awallin_> Guest81629: look at the pwmgen documentation, there should be a minimum duty-cycle input pin
[11:16:42] <Guest81629> sounds handy, let me have a look
[11:19:20] <Guest81629> ok I think I have found it, seems pretty straight forward... so if I need 35% of 20k, then the command should look something like: pwmgen.0.min-dc 0.35
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[11:46:46] <andypugh> Guest81629: Yes. But bear in mind that you will have zero output until you exceed that
[11:47:05] <andypugh> But that is probably what you want.
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[11:57:53] <jthornton> I need something like that on my BP but it uses the GS2 VFD...
[12:20:33] <jthornton> I'm trying to use graphviz in my asciidoc and I'm missing some crucial key element. I have graphviz installed and have some graphviz in my file but when I run make I get this error
[12:20:49] <jthornton> undefined filter attribute in command: graphviz2png.py {verbose?-v} -o "{outdir={indir}}/{imagesdir=}{imagesdir?/}{target}" -L {layout=dot} -
[12:21:09] <jthornton> is there supposed to be something in the make file?
[12:28:22] <andypugh> I think it may be saying that there is no indication what files it is meant to be processing
[12:31:16] <jthornton> hmm, I just found out that graphviz is a built in filter to asciidoc and my installed one might have messed that up
[12:31:28] <jthornton> nope
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[12:34:08] <jthornton> maybe mhaberler will wander by and give some advise
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[12:34:53] <mhaberler> you mean asciidoc?
[12:35:08] <jthornton> yes
[12:35:27] <mhaberler> been there, hold on..
[12:35:29] <jthornton> I see your on the asciidoc filter page
[12:35:38] <mhaberler> yes;)
[12:37:05] <mhaberler> can you paste the output of 'asciidoc -v yourfile.txt'?
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[12:37:44] <mhaberler> oh, I remember. this old asciidoc version cant default the target="filename" attribute
[12:37:48] <mhaberler> say like so:
[12:38:03] <jthornton> http://pastebin.com/YYByYWw7
[12:38:20] <mhaberler> ["graphviz", target="sample2.png"]
[12:40:36] <jthornton> now I get http://pastebin.com/dJT27HV0
[12:42:14] <mhaberler> look at line 4: https://code.google.com/p/asciidoc-diag-filter/source/browse/diag-filter-old.conf
[12:43:04] <mhaberler> at the end you have '&& echo " "' after the dash; I bet this is missing iny your graphviz-filter.conf
[12:43:23] <mhaberler> should be in /etc/asciidoc/filters/graphviz
[12:43:50] <mhaberler> add it in your graphviz-filter.conf
[12:44:13] <jthornton> looking
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[12:45:14] <mhaberler> just paste your graphviz-filter.conf
[12:46:59] <jthornton> http://pastebin.com/BYeZbHv9
[12:48:25] <jthornton> so it should be {target}" -Tpng - && echo " "'
[12:48:39] <jthornton> and not {target}" -L {layout=dot} -'
[12:48:47] <mhaberler> right (but not sure if this is it)
[12:49:07] <mhaberler> give it a stab; could be that graphviz2png.py doesnt find the graphviz program
[12:49:55] <jthornton> ok
[12:50:17] <mhaberler> I mean the 'dot' program..
[12:51:27] <mhaberler> could it be you have
[12:51:44] <mhaberler> ["graphviz", target="sample2.txt"] instead of ["graphviz", target="sample2.png"] in your ,txt?
[12:52:24] <jthornton> the sample file that came installed shows ["graphviz", "sample1.png"]
[12:52:44] <mhaberler> ah, ok, then use that, the target= seems superfluous
[12:52:58] <mhaberler> just saw it in the log
[12:53:48] <jthornton> graphviz2png.py: error: no such option: -T
[12:55:55] <mhaberler> hm, could you post the art of the .txt file which has the graphviz block?
[12:56:00] <mhaberler> art/part
[12:56:36] <jthornton> http://pastebin.com/d34xbtJ3
[12:57:20] <mhaberler> trying here..
[12:58:30] <mhaberler> what does asciidoc --version say?
[12:58:49] <mhaberler> I have asciidoc 8.5.2
[12:58:50] <jthornton> 8.5.2
[12:59:17] <mhaberler> ok, your .txt formats fine here.. hm
[13:00:27] <mhaberler> out of 'which dot' is /usr/bin/dot ?
[13:01:19] <jthornton> I don't have a /usr/bin/dot
[13:01:31] <jthornton> just a /usr/bin/dotlockfile
[13:01:32] <mhaberler> aha. That is the graphviz program.. hold on
[13:01:57] <mhaberler> sudo apt-get install graphviz
[13:02:10] <mhaberler> then undo changes in graphviz-filter.conf
[13:02:50] <mhaberler> sorry, my bad.. was simpler than I thought
[13:03:31] <jthornton> no errors but no png
[13:04:00] <mhaberler> post output of 'asciidoc -v foo.txt' once more
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[13:04:04] <jthornton> ok, this version still has the error that you have to run make twice to get the image
[13:04:13] <Loetmichel> mornin'
[13:04:21] <jthornton> YEA I have a graphic
[13:04:30] <jthornton> thanks mhaberler
[13:04:34] <mhaberler> super
[13:05:35] <jthornton> now to finger out what digraph G means
[13:05:55] <mhaberler> "left as an exercise for the reader";)
[13:07:11] <mhaberler> http://www.orient-lodge.com/node/3408
[13:09:08] <jthornton> thanks
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[13:28:12] <archivist_> lump of metal in the uk fleabay 221123191311
[13:32:51] <Vq> jthornton: Definition of a directed graph called "G".
[13:33:28] <Vq> jthornton: dot is a fairly simple language.
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[13:34:26] <Vq> digraph g { foo -> bar; bar -> baz; foo -> quux; } /* a complete renderable example */
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[13:42:16] <jthornton> Vq, I see digraph structs too
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[14:01:49] <JT-Shop> lump of metal seems to be removed
[14:08:56] <archivist_> it was a milling machine with paper tape control starting at 99p, worth a retrofit
[14:09:34] <jthornton> darn, and he pulled it
[14:10:54] <archivist_> seems a live listing still to me http://www.ebay.co.uk/itm/221123191311
[14:10:56] <jthornton> someone actually has a mack xml file for me to convert to stepconf xml file on the forum
[14:11:11] <archivist_> Bostomatic 300 CNC Milling Machine
[14:11:12] <jthornton> ah I didn't go to uk
[14:11:41] <archivist_> usually ebay works across countries ok
[14:12:00] <jthornton> yea, that's why I didn't bother to go to uk ebay
[14:12:11] <jthornton> dang control cabinet is bigger than the mill
[14:12:15] <archivist_> if I had space and money I would have it
[14:12:26] <archivist_> well old
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[14:28:10] <jp_> awallin_: you there?
[14:35:15] <jthornton> does the first block diagram look clear or should I make that into two separate blocks http://gnipsel.com/linuxcnc/configs/7i77.html
[14:35:48] <jthornton> the middle block seems to run together for me
[14:36:08] <jp_> looks clear to me
[14:41:46] <jp_> awallin_: just wondering if you had compiled repsnapper in 10.04?
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[14:47:57] <pcw_home> archivist_: Someone else asked about a Bostomatic 300 before
[14:47:59] <pcw_home> I think the fly-in-the-ointment is that its all hydraulic
[14:49:24] <archivist_> pcw_home, I just went off the idea, but it is probably a good source of castings to add sensible drives etc to
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[14:54:13] <jthornton> see if this looks better http://gnipsel.com/linuxcnc/configs/7i77.html
[15:17:39] <jp_> yeah that looks better
[15:18:40] <jp_> JT-Shop: do you use RS5000
[15:19:41] <jp_> the FB editor could be good for drawingthat stuff
[15:20:50] <jp_> jthornton: my bad wrong nick
[15:27:59] <andypugh> archivist_: Worth £5 just for the punched-tape reader :-)
[15:30:34] <awallin_> jp_: the latest 3d printing g-code I did was with slic3r, probably both on 10.04 and on 12.04
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[15:34:50] <skunkworks__> logger[psha]:
[15:36:09] <jp_> awallin: how did you like repsnapper though?
[15:37:08] <JT-Shop> jp_: I'm out in the shop
[15:37:23] <JT-Shop> yes, I have RS5000 but don't use it very often
[15:40:35] <JT-Shop> andypugh: I sorted out the touch screen seems if you reverse an axis the min and max get reversed as well
[15:45:50] <awallin_> jp_: my recollection is that skeinforge is pretty confusing, repsnapper maybe less so. slic3r seems pretty straightforward.
[15:48:11] <jp_> awallin_: yes that is true repsnapper was the only one that gave a preview almost backplot style window to see what was happening with the code. I saw that you had played with it and was just looking to see what your experiences were.
[15:48:27] <skunkworks__> jp_: saw your video - very cool. How is it going?
[15:50:06] <jp_> Good just working on different materials in the hotend. My Hotend is a j-head/ makerbot mk6 blend.
[15:52:33] <jp_> as far as the machine goes it's pretty standard stuff
[15:55:11] <jp_> Guess the best way to get analog in into linuxcnc is arduino?
[15:58:10] <skunkworks__> probably easiest..
[15:58:20] <skunkworks__> I used it for spindle temp.
[15:58:55] <jp_> thought so
[15:59:23] <skunkworks__> http://www.youtube.com/watch?v=h-CdFd2Zakc&feature=share&list=UUHk52YjGT8HryRYmJKSl-lg
[15:59:49] <jp_> PCW: analog board!!!!
[16:01:00] <skunkworks__> I used this... http://www.youtube.com/watch?v=h-CdFd2Zakc&feature=share&list=UUHk52YjGT8HryRYmJKSl-lg
[16:01:28] <skunkworks__> of course - non realtime but temp doesn't change very fast..
[16:03:05] <skunkworks__> heh - I mean - I used http://emergent.unpythonic.net/01198594294
[16:03:59] <jp_> yeah thats what i had planed on just need to get the ic's for my thermocouples
[16:10:39] <jp_> hmm. Im thinking a larger thermal mass is better
[16:13:33] <ReadError> anyone here done some mcmaster orders?
[16:15:50] <skunkworks__> yes
[16:20:22] <ReadError> how do they calculate shipping
[16:20:26] <ReadError> i see a place order button
[16:20:33] <ReadError> i can do willcall i suppose
[16:20:39] <ReadError> but was just wondering how much it would be to ship
[16:21:06] <JT-Shop> every day almost
[16:21:14] <ReadError> i mean
[16:21:17] <ReadError> calculation of price
[16:21:21] <skunkworks__> iirc - it gets added to the invoice after the fact.
[16:21:30] <ReadError> i assume when i place order, it goes through
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[16:35:49] <andypugh> Analog? Mesa 7i87 ought to be plug-and-play
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[16:47:55] * JT-Shop needs a 50 gallon tank for the plasma
[16:48:49] <JT-Shop> hmm a 7 cubic foot tank would do
[16:49:17] <Jymmm> decking material and pond liner?
[16:49:49] <JT-Shop> pressure tank, you apply a couple of lbs of air pressure to "pump" the water up to the water table
[16:50:01] <JT-Shop> then you vent the tank to empty the water table
[16:50:35] <Jymmm> Oh, I got one for $20 from CL
[16:50:56] <Jymmm> blue plastic
[16:52:25] <Jymmm> JT-Shop: 275galn http://kirksville.craigslist.org/grd/3243578737.html
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[16:54:44] <Jymmm> JT-Shop: too expensive, but... http://ottumwa.craigslist.org/grd/3260712583.html
[16:57:50] <JT-Shop> too big to fit under the table
[16:58:01] <JT-Shop> wrong shape
[16:58:08] <JT-Shop> too tall
[16:58:21] <Jymmm> JT-Shop: RV shop, grey water tank
[16:58:35] <JT-Shop> needs to be 18" h x 24" w x 36" long or so
[16:59:29] <Jymmm> http://www.icondirect.com/categories/RV-Exterior-Parts/Holding-Tanks/
[17:00:51] <Jymmm> JT-Shop: is 55gal enough?
[17:01:54] <JT-Shop> sure so what happens when you apply air pressure to a holding tank that is not designed to hold pressure
[17:02:13] <Tom_itx> it's how we pumped oil from 55gal drums :D
[17:02:40] <Jymmm> http://www.campingworld.com/shopping/item/portable-rv-fresh-water-tank-45-gallon/1605
[17:03:19] <Jymmm> 50 gallon bladder
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[17:04:57] <Jymmm> JT-Shop: just machine one out of solid aluminum
[17:04:59] <IchGuckLive> Hi all !
[17:05:24] <Jymmm> JT-Shop: OH, shit... 4-8" PVC pipes
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[17:07:27] <Tom_itx> get a plastic drum industrial soap came in or somthing
[17:07:38] <Tom_itx> i had a few 30gal ones like that
[17:07:46] <Tom_itx> they won't rust with the water
[17:07:55] <Tom_itx> i'm sure they'd handle a couple psi
[17:07:59] <Jymmm> Tom_itx: I suggested that, but it wont fit under his table
[17:08:10] <Tom_itx> get a 20gal then
[17:08:15] <Jymmm> 18"
[17:08:19] <skunkworks__> cool - http://bbs.homeshopmachinist.net/threads/55882-CnC-programs-Turbo-Mach3
[17:09:16] <JT-Shop> Tom_itx: rust is not a problem with plasma water the sodium nitrite takes care of that
[17:09:30] <Tom_itx> oh
[17:09:42] <JT-Shop> the holding tanks are too flat
[17:09:53] <Tom_itx> lay a barrel on it's side
[17:10:37] <Tom_itx> how many gal do you need?
[17:10:40] <JT-Shop> that could work but the diameter is too big
[17:10:56] <Tom_itx> get some old 20lb lp tanks
[17:11:02] <JT-Shop> 50 but I'll only use 40 or so and not pull from the bottom
[17:11:24] <Tom_itx> err 30
[17:12:25] <JT-Shop> a water heater tank might work but you only find rusted out tanks...
[17:13:13] <Tom_itx> try a pool place
[17:13:26] <Jymmm> fiberglass tank?
[17:14:16] <JT-Shop> only pool place around here charges you to answer the phone :/
[17:15:34] <Tom_itx> beer kegs
[17:15:42] <Tom_itx> now tell me you didn't think of that???
[17:15:57] <Tom_itx> comes with a cool factor too
[17:16:20] <JT-Shop> LOL, I have a keg... hmmm
[17:18:02] <Jymmm> Find an abandoned trailer and harvest the holding tanks from it =)
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[17:19:22] <Jymmm> or hit the junk yard and get a gasoline tank
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[17:22:05] <Tom_itx> salvaged submarine missle launch tube
[17:22:43] <Jymmm> There ya go, dig a well under the plasma and just hand pump it out!
[17:26:43] <JT-Shop> be easier to just make one I think
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[17:37:53] <jthornton> need to make a touch probe first
[17:38:00] <jthornton> hows yours working Tom_itx
[17:39:45] <jthornton> nap time
[17:43:00] <IchGuckLive> Question : Will this encoder make it to tread a Metric on a Tathe ? http://www.ebay.de/itm/RENCO-MODULAR-ENCODER-OPTICAL-INCREMENTAL-/260297277041?pt=BI_Control_Systems_PLCs&hash=item3c9aed3e71
[17:43:14] <IchGuckLive> Lathe = ? B)
[17:43:43] <IchGuckLive> 100ppr is not very high but on 600rpm proven
[17:45:31] <awallin_> looks like a big encoder for only 100ppr :) you might get 400 edges/rev in 4x mode..
[17:45:58] <IchGuckLive> ok
[17:46:31] <awallin_> don't they have the exact model&make on the ebay page? you should ask for a datasheet maybe..
[17:48:03] <IchGuckLive> at this price i shoudt give it a try
[17:49:07] <IchGuckLive> they got also a 256ppr for a mfg in stock single cahannel
[17:51:39] <awallin_> where is that 80servo seller? china?
[17:52:10] <IchGuckLive> Montville, New Jersey, Vereinigte Staaten von Amerika
[17:55:02] <IchGuckLive> awallin_: im told you are on holiday in the caribics
[17:55:44] <awallin_> IchGuckLive: huh? I was up in lapland for a while...
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[18:04:23] <IchGuckLive> ok
[18:05:52] <IchGuckLive> im off to the telescope clear cold night here good Photo shooting expected BY
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[18:08:16] <andypugh> JT-Shop: Mains-pressure hot water tank ought to work.
[18:08:40] <andypugh> Genrally they arr stainless.
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[18:12:54] <andypugh> JT-Shop: http://www.ebay.co.uk/itm/Santon-unvented-cylinder-/221123454998
[18:13:22] <andypugh> Though I can't see any sign of any in the US. DO you do your hot water in some strange way?
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[18:39:36] <JT-Shop> no, I use a normal water heater tank, mine is 50 gallon
[18:39:57] <JT-Shop> I looked on craigslist but all were new from dealers
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[18:48:48] <andypugh> A normal one is OK with a head of 1 house...
[18:49:16] <JT-Shop> yea, I run my water pressure at 60psig
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[18:57:20] <Tom_itx> put a rv regulator on it
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[20:35:40] <DJ9DJ> gn8
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[21:30:25] <skunkworks__> eh
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[22:24:13] <tjb1> http://static.ak.fbcdn.net/rsrc.php/v1/y2/r/5l8_EVv_jyW.swf?v=4319428939902&ev=0
[22:28:55] <L33TG33KG34R> so I am at a dilema
[22:29:17] <L33TG33KG34R> I have ordered the CRP2448 from CNCRouterParts
[22:29:36] <L33TG33KG34R> and its due to arrive sometime this week
[22:29:50] <L33TG33KG34R> I don't have any electronics ordered
[22:29:55] <L33TG33KG34R> nor a spindle
[22:30:29] <L33TG33KG34R> I am hell bent on using LinuxCNC because next semester I have control theory which I want to apply to this build.
[22:30:53] <L33TG33KG34R> I have a couple of decisions that I need to make.
[22:31:04] <jp_> mesa hardware is good!!
[22:31:18] <tjb1> http://www.youtube.com/watch?v=pD3zaRatH5M
[22:31:19] <L33TG33KG34R> 1) I want to do rigid tapping on this machine. I need an AC Servo?
[22:31:55] <jp_> servo would be recommended
[22:31:56] <L33TG33KG34R> 2) I was going to use the Mesa 6I25 with the 7I76 but I have no clue on the motors and drivers
[22:32:15] <Tom_itx> take a look at the 5i25 first
[22:32:26] <L33TG33KG34R> I want to keep this as cheap as possible (I know how contradictory that can get)
[22:32:30] <jp_> 6i25 is just pci E
[22:32:35] <Tom_itx> oh
[22:32:36] <jp_> is it not?
[22:32:39] <Tom_itx> dunno
[22:32:42] <micges> yes
[22:32:45] <jp_> think it is
[22:33:02] <L33TG33KG34R> I don't have no PCI capable Mobos. only PCI-E unless I can run PCI on PCI-E
[22:33:13] <L33TG33KG34R> it is simply PCI-E
[22:33:34] <micges> both are supported by linuxcnc
[22:33:46] <L33TG33KG34R> I understand that
[22:34:40] <L33TG33KG34R> I have $800 to spend at the moment. I'll have another ~$1.5k - $2k next year on more stuff
[22:34:51] <L33TG33KG34R> I need to assemble the machine once it gets here
[22:35:02] * skunkworks__ hugs linuxcnc again
[22:35:04] <jp_> What size of machine
[22:35:14] <L33TG33KG34R> 24" x 48" working area
[22:35:27] <L33TG33KG34R> with a 5" Z I believe
[22:35:38] * micges thinks that skunkworks is very close with linuxcnc :)
[22:35:39] <L33TG33KG34R> its the CRP2448 from CNCRouterParts
[22:36:45] <ReadError> im scared to update
[22:36:51] <ReadError> because it works so good right now
[22:37:42] <micges> if it's work don't touch it
[22:37:46] <L33TG33KG34R> I should really ask my question better
[22:38:01] <L33TG33KG34R> I'll be back
[22:38:02] <jp_> K this extruder is headed for the 4" rosebud
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[22:51:56] <L33TG33KG34R> ok. I have my question now
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[22:53:05] <L33TG33KG34R> should I spend my $800 on getting my control hardware like my Mesa cards, cables, limit switches and maybe a spindle and drive or should I get my motors first?
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[22:53:14] <L33TG33KG34R> plus I really don't know what kind of servos to get
[22:55:11] <L33TG33KG34R> plus I need to build a table to put everything on
[22:57:01] <Tom_itx> http://www.kelinginc.net/ServoMotors.html
[22:57:59] <L33TG33KG34R> these are DC servos?
[22:58:34] <Tom_itx> you want AC?
[22:58:36] <Tom_itx> http://www.kelinginc.net/ACServoMotor.html
[22:58:40] <L33TG33KG34R> no no
[22:58:42] <Tom_itx> you'll pay more
[22:59:05] <jp_> --on you budget DC is probably best
[22:59:15] <L33TG33KG34R> the machine I am getting is a rack and pinion but is belt driven from the stepper to the pinion
[22:59:36] <jdh> on a budget, steppers are probably best
[22:59:43] <L33TG33KG34R> with encoders?
[22:59:48] <Tom_itx> he want's to do rigid tapping
[23:02:32] <L33TG33KG34R> what about these guys?
[23:02:34] <andypugh> L33TG33KG34R: No real point with encoders on steppers.
[23:02:35] <L33TG33KG34R> http://www.dmm-tech.com/products_main.html
[23:03:13] <jdh> I would also prefer servos, but my budget says steppers
[23:03:28] <andypugh> The price is good for dmm-tech, but they only work step/dir so you don't get all the advantages of closing the loop in LinuxCNC.
[23:03:48] <L33TG33KG34R> ah.
[23:03:48] <jp_> find som cheap PMSM with encoder and hall's and use the 8120's
[23:04:07] <andypugh> And AFAIK there is no encoder feedback out of the drives either, as the encoders they use are magnetic.
[23:06:18] <L33TG33KG34R> ok so I need to find cheap servos for my machine. onto the next task... what kind of spindle would let me do rigit tapping while letting me mill aluminum and plastics?
[23:07:15] <andypugh> Check the specs, if there is encoder feedback out of the drives to the PC, then you can run velocity-mode stepgens, and then LinuxCNC is closing the loop (using pulse-rate control rather than the typical analog voltage)
[23:08:21] <andypugh> L33TG33KG34R: I think you would need a fairly slow, high-torque one for that use.
[23:08:34] <L33TG33KG34R> like a really beefy AC servo?
[23:08:55] <andypugh> Maybe a geared spindle.
[23:09:08] <andypugh> What sort of machine is this?
[23:09:20] <L33TG33KG34R> I was thinking of taking one of those chinese AC spindles, gearing them down, adding an encoder
[23:09:33] <L33TG33KG34R> but then someone pointed out that their torque is at their high rpm end
[23:09:58] <tjb1> Anyone know the teeth per inch of a 20PA 20 Pitch rack?
[23:10:04] <andypugh> Yeah, if you are going to gear it, then a generic AC induction motor is as good as anything.
[23:10:05] <L33TG33KG34R> and that gearing them would cause them to fail since they are designed to run at 24k rom and the slightest misalignment will cause them to fail
[23:10:46] <Tom_itx> tjb1 the key number seems to be 20
[23:14:42] <tjb1> So I need to find the Diametral Pitch?
[23:17:44] <L33TG33KG34R> would I be saving myself a lot of grief and not do rigid tapping? I guess it would be cheaper
[23:17:56] <Tom_itx> likely so
[23:19:09] <L33TG33KG34R> I guess a belt driven rack and pinion has its limitations. maybe servos are a bit overkill for it?
[23:19:47] <jdh> I don't see the relationship between rigid tapping and servos
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[23:20:16] <L33TG33KG34R> I was originally thinking of getting these: http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=280912711426
[23:21:03] <L33TG33KG34R> well I guess a 300W-400W servo should be good enough on my machine since they would provide a better torque curve than a stepper
[23:21:17] <jp_> Those are steppers
[23:21:21] <jdh> do you already have the machien?
[23:21:22] <L33TG33KG34R> I know they are
[23:21:27] <L33TG33KG34R> no I don't
[23:21:27] <jp_> k
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[23:31:58] <andypugh> The dmm-tech is probably a better bet than those steppers.
[23:35:39] <andypugh> Though about twice the price. (I wonder why dmm publish prices in USD not CAD?)
[23:39:42] <andypugh> I think it you only have $800 for 4 motors + drives + PSU then it will have to be Steppers.
[23:40:58] <jdh> what does the machine mfg suggest for motors?
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[23:43:40] <tjb1> What a weird number of washers per package…435 or 192 hmm
[23:44:09] <L33TG33KG34R> well the manufacturer uses steppers mainly
[23:44:19] <L33TG33KG34R> I ordered mine with NEMA 34 mounts
[23:44:46] <L33TG33KG34R> the only thing in DMM's catalog thats a NEMA 34 size is their 750W motor
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[23:58:26] <tjb1> For cable chain, do I only need half of axis travel?
[23:58:29] <andypugh> Servos are by no means always to NEMA standards. No reason that they should be, either.
[23:58:41] <L33TG33KG34R> I understand that
[23:59:00] <andypugh> (NEMA is only a set of US standards)
[23:59:09] <L33TG33KG34R> so my best bet right now would be to stick with steppers until I can start making parts with this machine
[23:59:16] <L33TG33KG34R> then I can upgrade it later on
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[23:59:30] <andypugh> Seems sensible.
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[23:59:56] <jdh> then you can put the steppers on your other machine
[23:59:58] <andypugh> With that eBay set you can start moving motors direct from the parport.