#emc | Logs for 2011-04-01

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[01:32:40] <tom3p> did everyone get new login screen from freenode with an ascii art unicorn?
[01:33:32] <jdhNC> first rule, don't talk about the unicorn.
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[01:39:35] <tom3p> cradek, I faked changing tool shapes in vizmach.
[01:39:48] <tom3p> Coded a cyl and a box in same space at end of spindle.
[01:39:56] <tom3p> Then reduced the cyl dimension pins to expose the rect, or vsvs.
[01:40:06] <tom3p> It >looks like< I changed the tool.
[01:40:14] <tom3p> Todo: put forms in the rack, swap their dims to the morphing tool on spindle and reduce the item in the rack to 0.
[01:40:15] <tom3p> All slight of hand but looks right.
[01:42:02] <tom3p> fwiw i >can< use tools that are cubic ;)
[01:47:47] <tom3p> is there any example of using the ascii-stl primitive in vismach? ( or the transparent HUD display ?)
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[02:34:24] <jdhNC> I had some bayonet gloves iwth rings, they sucked
[02:34:29] <jdhNC> <urk>
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[03:54:40] <Jymmm> SWPadnos: ping
[03:54:50] <SWPadnos> bed
[03:54:52] <SWPadnos> ping
[03:54:54] <SWPadnos> pong
[03:55:00] <Jymmm> lol
[03:55:14] <Jymmm> SWPadnos: when you coming into town?
[03:55:55] <SWPadnos> May 1, 6:44 PM, United 6519 from LAX
[03:56:17] <Jymmm> SWPadnos: SFO or SJC ?
[03:56:22] <SWPadnos> SJC
[03:56:34] <Jymmm> ESC ?
[03:56:37] <SWPadnos> YES
[03:56:49] <Jymmm> SWPadnos: Ride?
[03:57:03] <SWPadnos> Sure
[03:57:08] <SWPadnos> Dinner?
[03:57:28] <Jymmm> Always
[03:57:30] <SWPadnos> (may be too late for me, and I'll have 3 hours in LA, so might be better another night)
[03:57:53] <Jymmm> whatever works for ya
[03:58:20] <SWPadnos> I'll let you know. I'm going straight to SJC from a shoot in Dallas
[03:58:44] <Jymmm> grassy knoll?
[03:58:52] <SWPadnos> no comment
[03:59:20] <Jymmm> SW 'Lee' Padnos
[03:59:50] <SWPadnos> down, and to the left
[03:59:51] <SWPadnos> down, and to the left
[03:59:53] <SWPadnos> down, and to the left
[04:00:17] <Jymmm> SWPadnos: Hey, have you seen CFL's that get up to 154F ?
[04:00:29] <SWPadnos> no idea. they do get hot though
[04:00:32] <Jymmm> 7W Candelabra CFL
[04:00:54] <Jymmm> SWPadnos: The glass, not the base.
[04:01:01] <SWPadnos> no idea
[04:01:05] <Jymmm> k
[04:01:40] <Jymmm> I'll have to see if the LED ones get that hot too.
[04:02:10] <Jymmm> I dont think the incadesent ones get that hot, but I could be wrong.
[04:02:36] <SWPadnos> the filament in an incandescent gets to several thousand degrees (else it wouldn't emit light)
[04:02:51] <SWPadnos> it's kind of a matter of how much of the IR gets to the glass
[04:02:52] <Jymmm> SWPadnos: surface temp, not filament
[04:03:16] <Jymmm> I've had 25W not get so hot that you can't touch them
[04:04:05] <Jymmm> SWPadnos: btw, just remind a day or two before hand.
[04:04:21] <SWPadnos> ok, will do
[04:04:43] <SWPadnos> I should have a little time the night before, we're shooting outside and it gets dark relatively early
[04:05:09] <Jymmm> SWPadnos: May 1 is almost close to the longest day of the year
[04:05:46] <SWPadnos> err, 2/3 of the way toward the median
[04:05:59] <SWPadnos> Summer solstice is in late June
[04:06:03] <SWPadnos> (22-23 or so)
[04:06:04] <Jymmm> k
[04:10:34] <pcw_home> endogenous retroviruses comprise 5-8% of the human genome
[04:14:04] * Valen had a 36W CFL in the bathroom
[04:14:09] <Valen> was pretty good
[04:14:18] <Valen> I know one guy who had a 150W CFL
[04:14:26] <Jymmm> Valen: how hot thugh?
[04:14:26] <Valen> though perhaps that should be cFL
[04:14:35] <Valen> they get hot
[04:14:48] <Valen> most of mine are too hot to comfertably touch
[04:14:53] <Valen> (though I am a wuss)
[04:15:11] <Jymmm> Well, I know the base gets hot, but not hte glass
[04:15:21] <pcw_home> We have some of those for photography. look like CFLs from the land of the giants
[04:16:13] <Jymmm> For a 7W CFL to get to 154F, seems like BS to me.
[04:19:37] <Valen> thats only 70C thats not really that hot
[04:19:52] <Valen> the base shouldn't be the thing getting hot
[04:20:05] <Valen> inside the glass is a several thousand degree arc/plasma
[04:20:19] <Jymmm> When I can touch a 48" bulb all day long it sure is
[04:20:26] <Valen> well the base should only heat up due to conduction
[04:21:00] <Valen> thats because the surface area to power ratio of the 4ft bulb is much greater
[04:21:16] <Valen> IE it puts out more light, but over a much much larger area to disipate the heat
[04:21:34] <Jymmm> I aint buying it
[04:22:08] <Jymmm> and CFL's never last 8000 hours, barely 9 months
[04:22:20] <Jymmm> 7 years my ass
[04:22:28] <Valen> mainly depends on how often you turn them on and off
[04:22:36] <Valen> also there is a wide range of quality
[04:22:38] <Valen> most are shit
[04:22:54] <Jymmm> s/most/all/ + mercury
[04:23:41] <Valen> eh, most have mercury, though you can get them without
[04:23:55] <Valen> that and the ones with have ~ug of them
[04:23:57] <Valen> of it
[04:25:03] <Valen> I believe phillips is amongst the better brands, some guy reviewed a bunch of them and found them signifigantly better than the other CFLs
[04:25:49] <Jymmm> I need to see if the LED bulbs are better. I know they get really hot though.
[04:26:06] <Jymmm> even need big heat sinks
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[04:27:29] <Valen> I'm not too fussed on the CFLs really
[04:27:36] <Valen> LED's are almost there
[04:28:14] <Jymmm> there here, just not popular enough to lower the price
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[04:30:54] <Valen> i mean the very best LED's are only just the same efficency as a regular fluro
[04:31:10] <Valen> and the cost per lumen is much much higher
[04:31:51] <Valen> 4ft fluro is still the most efficient "available" light source
[04:32:22] <Valen> LED's are much harder to make than fluros too so I doubt your going to get a string that does the same light output for 60 cents lol
[04:32:52] <Valen> though I know a few people using these http://www.hobbyking.com/hobbyking/store/uh_viewitem.asp?idproduct=8944 as lights
[04:33:07] <Jymmm> Not $0.60, but $4-6 not $11-$15
[04:33:20] <Valen> hah a $15 LED light is going to be shit
[04:33:28] <Valen> $15 buys you one decent LED
[04:33:44] <Valen> (the reason the LED's seem so hot is the surface area they have to emit over is so small, combined with their relativley low efficency)
[04:34:33] <Valen> check this guys out http://www.robowars.org/forum/viewtopic.php?t=1366&postdays=0&postorder=asc&start=195
[04:34:45] <Valen> I bet he won't get the "100,000 hours" out of them
[04:36:07] <Jymmm> 50k is still good
[04:41:26] <Valen> most off brand LED's have 30% brightness reduction after a few 10's of hours and die before 700
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[04:42:09] <Jymmm> 110/220vac bulbs?
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[05:59:08] <Valen> thats for a bare LED
[05:59:17] <Valen> with an ideal current drive
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[06:04:42] <Jymmm> eh
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[12:11:03] <Jymmm> Anyone happen to have a linear accelerator by chance?
[12:12:11] <awallin> what would you do with it?
[12:12:57] <atom1> put a rocket in space
[12:13:29] <Jymmm> This... http://i53.tinypic.com/zx36ld.jpg
[12:15:51] <atom1> is that acryllic?
[12:15:57] <Jymmm> yep
[12:16:13] <atom1> there's a company here that puts stuff in acryllic
[12:16:26] <atom1> i've seen dandelions etc encapsulated
[12:16:42] <atom1> the seed pod not the flower
[12:16:58] <atom1> i don't know how they do it
[12:17:10] <Jymmm> That's done with 5M Volt linear accelerator
[12:18:18] <Jymmm> @500Amps
[12:18:56] <atom1> call CERN maybe they can help
[12:19:37] <Jymmm> LL is just up the road with a 2mile long one
[12:20:01] <atom1> getting there is easy, getting in may not bee
[12:20:28] <Jymmm> One of the local ham clubs has meetings there once a month it seems
[12:21:30] <Valen> you should be able to do that without a bigass particle accelerator
[12:21:46] <Valen> go thinner and use a TV tube
[12:22:08] <Valen> but generating 5M volts isn't too hard to do if your keen
[12:23:08] <Jymmm> Sorry, Stanford Accelerator... http://maps.google.com/maps?f=q&source=s_q&hl=en&q=accelerator&aq=&sll=37.413732,-122.220325&sspn=0.021645,0.041027&gl=us&ie=UTF8&t=h&rq=1&ev=zo&split=1&radius=1.35&hq=accelerator&hnear=&ll=37.414755,-122.221484&spn=0.021645,0.041027&z=15
[12:24:43] <Jymmm> See BOTH videos on this page... http://www.capturedlightning.com/frames/interesting.html
[12:25:04] <Jymmm> 2.5M @ 3500Amps
[12:25:11] <Jymmm> 2.5MV @ 3500Amps
[12:26:48] <Valen> those amp figures are probably the discharge figure
[12:27:05] <Jymmm> Does it matter? LOL
[12:27:27] <Valen> its just discharging it through a phat ground strip
[12:27:37] <Jymmm> Again, Does it matter? LOL
[12:27:55] <Valen> 3500 amps of beam power is a very different thing
[12:28:42] <Jymmm> Dude, it's still 8,750,000,000 fscking watts!!!
[12:29:04] <Valen> for a nanosecond
[12:29:19] <Jymmm> Enough to fsck you or anyone else up
[12:29:32] <Valen> a 22 bullet will do that too
[12:29:37] <Valen> its not that exciting
[12:29:45] <Valen> "Each specimen holds almost 1000 watt-seconds (joules) of electrostatic energy, or about 3X the maximum energy stored in a medical heart defibrillator. "
[12:29:50] <Jymmm> So will the rock I'm about to throw at you
[12:31:41] <Valen> 3000A isn't that much for a pulse discharge thing
[12:32:01] <Jymmm> touch it then
[12:32:08] <Valen> they seem rather cavaleer about it
[12:32:40] <Valen> ie if it was "2 million volts" they would want rather more isolation as that equates to something like a 10 foot spark in air
[12:33:07] <Valen> i mean don't get me wrong its cool and all
[12:33:24] <Jymmm> Look around the website, they show sme pieces still holding acharge 20 minutes later.
[12:34:01] <Valen> its acrylic, thats not really a big thing, electrostatic charges are easy enough to build up
[12:34:24] * Jymmm flings poo at Valen
[12:34:26] <Valen> like normal static is 10-100,000 volts and a coupla hundred amps
[12:34:40] <Valen> thats just walking on carpet
[12:34:56] <Valen> something like this is cool http://www.youtube.com/watch?v=gs51nH46F-g&feature=related
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[12:43:14] <mrsunshine_> http://www.youtube.com/watch?v=gzcq755ktew&feature=related ough, wth =)
[12:43:50] <Valen> mmmm magnetism
[12:44:08] <Valen> and induced currents ftw
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[13:28:00] <skunkworks> along the same lines as the rockwell video http://www.youtube.com/watch?v=oIS5n9Oyzsc
[13:28:49] <skunkworks> http://www.youtube.com/watch?v=lBp5ag6SJH4
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[13:32:28] <shyfx> that first one is hilarious
[13:48:38] <anonimasu> I ordered a new spindle :]
[13:49:16] <skunkworks> yay!
[13:49:24] <shyfx> describe
[13:51:21] <anonimasu> 750w 3000-24000rpm
[13:51:47] <anonimasu> with a tir good enough to run 0.3mm tools
[13:51:47] <shyfx> nice, where you get it from?
[13:51:53] <anonimasu> isel
[13:51:58] <shyfx> PCB routing?
[13:52:06] <anonimasu> aluminium and plastic work
[13:52:30] <shyfx> what are you making wiith tools that small ?
[13:52:33] <shyfx> injection molds/
[13:52:36] <anonimasu> er 16
[13:53:07] <anonimasu> exactly
[13:53:16] <shyfx> sexy tool
[13:53:29] <anonimasu> I plan on running 1mm or 2mm tools for the current job
[13:54:02] <shyfx> what are you using for your control hardware?
[13:54:07] <anonimasu> right now heidenhain
[13:54:14] <anonimasu> and emc on my little mill where it'll end up
[13:54:15] <shyfx> I imagine EMC2 since you are here...
[13:54:18] <anonimasu> err emc2...
[13:54:31] <anonimasu> but I need time to finish it
[13:54:46] <shyfx> but hardware wise... stepper, servo? mesanet? other?
[13:54:51] <anonimasu> servo
[13:54:57] <anonimasu> mesanet's drivers
[13:55:05] <anonimasu> (planning on) when I get it running
[13:55:17] <shyfx> nice, i got the mesanet 5i20, it's pretty good
[13:55:24] <anonimasu> I use the 7i43 ones
[13:55:29] <anonimasu> very happy with them
[13:55:39] <anonimasu> my spindle on the machine now gives me 2k rpm...
[13:55:42] <anonimasu> the big mill
[13:56:10] <anonimasu> and it's way too slow to cut with a 0.10mm tip tool to finish letters
[13:56:36] <anonimasu> the choice was between a normal hand type router or a proper spindle
[13:57:35] <anonimasu> http://www.roboty.fi/UFM500.gif like that
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[13:58:19] <anonimasu> http://www.solectro.se/Archive/Images/Products/244/iSA_750.jpg <- that's the one i chose
[13:58:38] <shyfx> Yeah i am on their page checking them out, pretty neat stuff
[13:58:49] <shyfx> could convert a little sherline to a mini HSM setup
[13:58:57] <anonimasu> they said the ufm ones are good very good
[13:59:10] <anonimasu> but then also that the other spindles are in another division
[14:00:06] <shyfx> what machine is this running in?
[14:00:48] <anonimasu> none yet
[14:00:51] <anonimasu> 3 weeks until i get it
[14:01:02] <anonimasu> a old cnc mill for now
[14:01:06] <anonimasu> since I need parts made quickly
[14:01:28] <shyfx> you doing commercial stuff or just hobbyist/
[14:01:45] <anonimasu> i dont know yet
[14:01:56] <anonimasu> i took a dive for the spindle to see if it's possible to go commercial
[14:02:54] <anonimasu> http://www.milling-spindles.isel.com/milling_spindles.php#isa2200%27 <- videos of the smaller spindle in the corner
[14:05:17] <shyfx> very very nice
[14:06:57] <anonimasu> decision between cheap spindle and fighting or a expensive spindle and buying expensive bearings + building everything and buying a premade one
[14:07:12] <anonimasu> err for the cheap spindle and building a tool mount myself...
[14:08:25] <shyfx> yeah its a lot of engineering, people think its just precision ground... its about clearances, thermal characteristics, stiffness etc
[14:10:14] <shyfx> its going to sound freakin' awesome though when its going
[14:10:17] <shyfx> screaming its head off
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[14:16:51] <anonimasu> yep
[14:16:52] <anonimasu> :]
[14:19:32] <shyfx> anyway, 2am, goodnight :)
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[14:40:14] <jdhNC> what's the whole url?
[14:44:16] <anonimasu> for what?
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[15:09:48] <psha> http://stackoverflow.com/questions/5508110/why-is-this-program-erroneously-rejected-by-three-c-compilers
[15:13:29] <skunkworks> heh :)
[15:13:35] <awallin> MattyMatt: in case you were wondering, I got the pan/rotate/zoom thing working now... hope to do some useful work with the cutting-simulation later
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[17:01:14] <Paragon39> Hello All, I purchased a couple of Parker Compumotor drives off of ebay sometime back and they have been sitting on the shelf waiting for a project. Well I am concidering retro fitting my denford starturn to use the drives with a couple of DC brushless motors that I just purchased from Motion Control that I will fit a couple of HED optical encoders to. The Drivers are model OEM670T and...
[17:01:16] <Paragon39> ...appear to expect a +/- 10V and produce 1.2A per volt. What is required to drive these from EMC2? I should also mention that I also have the Messa 7i43 card available but not yet implemented.
[17:03:04] <JT-Shop> a 7i33TA works nice for that
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[17:03:45] <Paragon39> Is that another Messa card JT?
[17:05:39] <Paragon39> JT-Shop: Found it ... 4 axis Analog servo amp interface - terminal strip I/O for Anything I/O... thanks
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[17:15:52] <Paragon39> On another note what are the capabilites of EMC2 with regards to lathe control ie gcode, canned cycles etc?
[17:16:55] <IchGuckLive> look into the wiki and the Devels are working hard to increase this
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[17:17:20] <IchGuckLive> there are also alot of simple helper programms to fix this
[17:19:14] <Paragon39> IchGuckLive: Thanks for the pointer. Any particular location on the Wiki that I should be looking?
[17:20:02] <IchGuckLive> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl
[17:20:40] <IchGuckLive> you can seartch this side for your command
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[17:21:26] <Paragon39> Oh... I didn't see the search box :-)
[17:22:33] <IchGuckLive> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Lathe_Code
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[17:24:18] <Paragon39> IchGuckLive: Thanks...
[17:24:42] <IchGuckLive> NP
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[17:32:36] <IchGuckLive> Paragon39: if you look on the simple g-codes you see that you easy can make your own python layout to get the specified g-code as you want it to be
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[17:33:54] <Paragon39> IchGuckLive: Simple Gcodes?
[17:34:23] <IchGuckLive> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Simple_EMC_G-Code_Generators
[17:34:40] <Paragon39> Thanks
[17:34:47] <IchGuckLive> i did the 11 and 12
[17:34:57] <IchGuckLive> for my own request
[17:35:52] <IchGuckLive> the tutorial video to number 12 has now over 5000 hits
[17:36:12] <Paragon39> wow... I like it!
[17:36:34] <JT-Shop> Paragon39: have you seen ngcgui
[17:36:47] <IchGuckLive> just get one of the Pythons and modify it to your need
[17:36:53] <Paragon39> Dont think I have...
[17:36:56] <IchGuckLive> then share it with us
[17:37:08] <JT-Shop> http://www.linuxcnc.org/component/option,com_kunena/Itemid,20/func,showcat/catid,40/lang,english/
[17:37:27] <JT-Shop> a bunch of lathe subroutines and a few mill ones
[17:38:23] <IchGuckLive> JT-Shop: thanks i dident now that for myself
[17:38:29] <JT-Shop> I seldom have to write g code on my lathe or plasma any more
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[17:40:25] <IchGuckLive> is there a thinking of integrating this thinks with parameters Gui to Axis like a Cycle mashine
[17:40:31] <skunkworks> I need to try the ngcgui...
[17:40:43] <Paragon39> Nice... thanks JT-Shop I think I will definatly retro the starmill to EMC2... archivist mentioned I could use classic ladder for the ATC. The ATC uses 3 output wires which produce the grey-code. would EMC be able to handle this?
[17:41:06] <Paragon39> IchGuckLive: Do you have a link to video you mentioned?
[17:41:09] <skunkworks> I have been using ace converter and acad
[17:41:42] <IchGuckLive> Paragon39: its just pressing the buttons around
[17:42:07] <Paragon39> Oh ok...
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[17:42:32] <archivist> Paragon39, yes, it would not be too dissimilar to skunkworks toolchanger looking for the tool id in the chain
[17:42:43] <IchGuckLive> the HEEKSCAD/CNC now has 3 integreadet EMC2 post processor witch make nice and good short codes even with CutterRadiusConpensation to Tool Table
[17:43:02] <JT-Shop> Paragon39: yes, my lathe is the same way and I use classicladder to handle the tool changer
[17:43:48] <Paragon39> Thanks Guys ... Of to look at the calsic ladder info...
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[17:44:42] <archivist> a lot of beer to get to calsic ladder stage
[17:44:54] <IchGuckLive> B)
[17:45:54] <IchGuckLive> im off 2
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[17:46:26] <Paragon39> lol...
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[17:48:53] <JT-Shop> just takes me a keg to get into classicladder
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[17:58:16] * JT-Shop goes to get a haircut and gas up the bike
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[18:13:38] <fragalot> wooo
[18:13:44] <fragalot> my 200mW laser just arrived
[18:14:08] <fragalot> tested it manually wearing sunglasses, a welding helmet and a 3-stop camera filter xD
[18:14:16] <fragalot> it works brilliantly
[18:14:30] <alex_joni> fragalot: you should get some proper laser glasses
[18:14:34] <fragalot> I will
[18:14:36] <fragalot> ordering thme now
[18:14:38] <fragalot> them*
[18:14:49] <alex_joni> the welding helmet, camera filter and sunglasses don't really filter out the needed wavelength
[18:14:52] <fragalot> let me rephrase
[18:14:58] <fragalot> i'm trying to find my bookmark but can't
[18:15:06] <alex_joni> they filter out the light, not the UV stuff
[18:15:17] <alex_joni> so you can still get blind by looking directly into it
[18:15:18] <fragalot> alex_joni: it's a red laser, afaik those don't emit uv
[18:15:29] <fragalot> alex_joni: it's a welding helmet
[18:15:33] <alex_joni> ok, for a red you might get lucky
[18:15:34] <fragalot> i'm fairly sure those filter UV
[18:15:55] <alex_joni> but I still wouldn't look at a laser
[18:15:59] <alex_joni> be it only 200mW
[18:16:06] <fragalot> ofcourse
[18:16:16] <alex_joni> I recently got a 1W blue one
[18:16:25] <fragalot> I only tested it for like 3 seconds to see if it worked or not so I wouldn't buy glasses for no reason
[18:16:42] <fragalot> alex_joni: suggest me some decent glasses please? I can't find the ones i bookmarked
[18:16:49] <fragalot> oh wait i still have the email from the webshop
[18:16:53] <alex_joni> I got mine together with the laser
[18:16:57] <alex_joni> from wickedlasers.com
[18:17:10] <alex_joni> but they are probably for a different wavelength than yours
[18:17:23] <fragalot> I found that site just a bit too expensive lol
[18:17:32] <fragalot> I only paid 27 usd for my laser
[18:18:43] <fragalot> bum can't find the mail >.<
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[18:19:47] <fragalot> aha - dragonlasers.com
[18:21:12] <Paragon39> fragalot: These glasses should do the trick! http://www.google.co.uk/imgres?imgurl=http://i01.i.aliimg.com/photo/v0/222079231/Party_glasses_party_sunglasses_funny_glasses_festival.jpg&imgrefurl=http://www.alibaba.com/product-gs/222079231/Party_glasses_party_sunglasses_funny_glasses.html&usg=__mg_T7m_pSmUsWj6F2w7bJEzV4ak=&h=605&w=500&sz=32&hl=en&start=136&sig2=e34JHPmfl8t0OdZKaG7n9g&zoom=1&tbnid=OD
[18:21:13] <Paragon39> uXy2XmkmFZdM:&tbnh=150&tbnw=128&ei=YxeWTZXTM4aAhAfBp53fCA&prev=/search%3Fq%3Dfunny%2Bglasses%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26sa%3DX%26rls%3Dorg.mozilla:en-GB:official%26biw%3D1414%26bih%3D807%26tbm%3Disch0%2C3759&um=1&itbs=1&iact=rc&dur=414&oei=SheWTZXZK8XXtAaJxuDIBQ&page=6&ndsp=29&ved=1t:429,r:19,s:136&tx=38&ty=55&biw=1414&bih=807
[18:21:16] <fragalot> Anyone near me in need of red laser glasses (belgium) -- cheaper shipping then :D
[18:21:20] <Paragon39> oopps!
[18:21:30] <fragalot> Paragon39: party sunglasses eh
[18:21:45] <fragalot> I think i'm going to go for these anyway http://www.dragonlasers.com/product.php?productid=16422
[18:21:45] <Paragon39> ;-)
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[18:22:50] <Paragon39> fragalot: They should do the trick...
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[18:28:22] <fragalot> anyone have a "partner ID" for dragonlasers they wish me to use for them?
[18:28:49] <Paragon39> Just purchased a couple of these motors they are 0.32Nm / 45.31 oz/in Hoping they will be adequate for Starturn Lathe Retrofit?
[18:29:12] <Paragon39> And the link ... http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=380317877747&ssPageName=STRK:MEWNX:IT
[18:29:35] <anonimasu> Paragon39: didnt you have servos?
[18:29:46] <anonimasu> Paragon39: they are too weak
[18:29:50] <anonimasu> most certainly
[18:30:01] <fragalot> I somewhat doubt those will work too
[18:30:16] <anonimasu> they couldnt push my mill along with 6:1 gearing
[18:30:55] <anonimasu> Paragon39: are you there?
[18:31:21] <Paragon39> anonimasu: No servos but I have a number of HED optical encoders. The stepper motors that are on the machine a very old late 80's single stack nema23 but am not sure of the torque rating.
[18:31:44] <anonimasu> Paragon39: alot more then your servos
[18:31:49] <anonimasu> maybe 3-4 times
[18:31:53] <anonimasu> (I have the same lathe
[18:31:53] <fragalot> mine are .44Nm for a tiny teeny mill with 6mm threaded rods and it feels like they're only just enough
[18:31:53] <anonimasu> )
[18:32:09] <fragalot> 2kg is the most it can move
[18:33:20] <Paragon39> I dont think the stepper motors are as strong to be honest... Im going to look at denford forum to see if I can find the part numbers of the steppers.
[18:33:25] <anonimasu> they are
[18:33:40] <anonimasu> compareable size nema steppers are alot stronger
[18:33:46] <anonimasu> sorry :S
[18:34:15] <Paragon39> I wasnt aware of that ... dam... Oh well :-(
[18:34:46] <anonimasu> I have some endmills with 0.1mm tip -_-
[18:34:50] <anonimasu> my spindle for now is 2000rpm
[18:34:55] <anonimasu> im gonna plow plastic with them..
[18:35:30] <Paragon39> If thats the case why do people bother using servos and not just use steppers with optical encoders to close the loop?
[18:35:58] <anonimasu> because servos have constant torque over their whole registry
[18:36:27] <Paragon39> Oh right were as steppers drop of with rpm right?
[18:36:33] <anonimasu> yes
[18:36:45] <anonimasu> tho if you size correctly with steppers you end up in the constant torque region
[18:37:02] <anonimasu> also, steppers the same size has a larger holding torque
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[18:37:58] <Paragon39> I see. Thanks for the info. Didnt Cradek use small pitman servos driven by the pluto-p card to drive his lathe?
[18:38:26] <anonimasu> if you gear them 100:1 or something it can work
[18:38:42] <anonimasu> but what's the point in having a proper lathe if you cant cut 10% of what it can handle
[18:39:20] <cradek> yes, but on a little lathe
[18:39:26] <cradek> it works only adequately
[18:39:48] <anonimasu> for a lathe like the starturn you need pretty big servos to use the machine to it's limit
[18:39:49] <cncbasher> denford steppers are around 150 oz /in
[18:39:52] <Paragon39> The Denford Starturn is small 160mm Z travel
[18:40:05] <anonimasu> perfect shop size :)
[18:40:29] <Paragon39> http://www.susan-parker.co.uk/susan-cnc-starturn.htm
[18:40:40] <anonimasu> oh
[18:40:41] <anonimasu> heh
[18:40:50] <anonimasu> not the same as mine
[18:40:57] <cncbasher> denford steppers 150oz in
[18:41:15] <anonimasu> I thought it was: http://www.wotol.com/images/thumbs/800x800/186706_49a1ca5b4461c4f6b2316a83859742d4.jpg
[18:41:53] <Paragon39> anonimasu: Thats the easiturn ... ;-)
[18:42:05] <anonimasu> you know that's like 1nm
[18:42:18] <anonimasu> yeah but I thought starturn was just a variation
[18:42:20] <cradek> Paragon39: does it have little ballscrews?
[18:42:27] <cncbasher> probably more than 1nm
[18:42:38] <Paragon39> cradek: Yes it does.
[18:42:45] <cradek> cool!
[18:42:52] <cncbasher> all denford's are around the same
[18:42:57] <cradek> seems like it might work with your motors then
[18:42:57] <anonimasu> yep
[18:43:07] <cncbasher> iv'e got 3 denfords here
[18:43:14] <anonimasu> hehe what are you doing with them=
[18:43:15] <anonimasu> ?
[18:43:22] <Paragon39> cncbasher: 150 oz in ... as much as that ....
[18:43:52] <Paragon39> anonimasu: your question directed to me or cncbasher?
[18:44:07] <anonimasu> cncbasher
[18:44:13] <Paragon39> k
[18:44:20] <cncbasher> = 105 newton cm
[18:45:42] <cncbasher> i use them mostly for small rc engines
[18:45:55] <cncbasher> and prototype stuff
[18:46:06] <anonimasu> I see :)
[18:46:30] <Paragon39> cncbasher: nice!
[18:46:57] <cncbasher> have an Orac and Triac as well
[18:47:11] <cncbasher> along with an easymill 3
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[18:50:04] <Paragon39> I have the Starturn and Starmill :-) Which are CNC a Boxford AUD lathe, a Balding Beaver mill (circa 1952) a 7x12 lathe, a Granville Senior Lathe, A IME watchmakers lathe, a geneva watchmakers lathe. I think I love lathes ... lol
[18:50:29] <anonimasu> hehe
[18:50:39] <anonimasu> I have a schaublin sv13 that's going cnc :]
[18:50:58] <cncbasher> great
[18:51:06] <Paragon39> schaublin are great lathes :-)
[18:51:29] <cncbasher> have Hardinge cnc one too
[18:52:22] <cncbasher> what do you do .. get up in the morning and decide which lathe to turn on
[18:52:24] <Paragon39> On another note are there any ciruit diagrams available to produce the +-10v for analogue servo drives?
[18:53:00] <anonimasu> no, but I wouldnt swap them out for anything if you have a machine they fit on
[18:53:04] <cncbasher> i just use a Homman designs digispeed convertor
[18:53:06] <Paragon39> It difficult, a bit like been in a sweet shop ;-)
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[18:53:41] <Paragon39> cncbasher: 3phase converter?
[18:53:53] <cncbasher> but taking a pwm signal to analog is pretty easy to do
[18:54:12] <cncbasher> no all proper 3ph mains here
[18:54:52] <Paragon39> cncbasher: nice... I built a rotary converter, it works pretty well :-)
[18:55:23] <Paragon39> cncbasher: The homman = +-10v ?
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[18:56:13] <cncbasher> what are you wanting to drive ?
[18:56:58] <cncbasher> arh ok analog
[18:57:17] <cncbasher> no the digispeed is good for spindles etc
[18:57:38] <cncbasher> i should have a circuit somewhere 1 min
[18:58:33] <Paragon39> The PWM out is only 5v positive so I would need convert this to +-10V to drive the parker analogue servo drives JT-Shop mentioned the messa 7i33TA card but I was wondering how to fab a circuit to produce the +-10V from the 5v pwm.
[18:59:49] <alex_joni> it-s 0..5V you need to convert to -10..10V
[19:00:03] <alex_joni> simple opamp should do the trick
[19:00:14] <cncbasher> ok got ya , back in a min looking for a circuit that will do it for you
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[19:01:31] <Paragon39> alex_joni: yes op amp should do the trick giving a proportional output to input... god the hangover from lastnights bevereges is still with me :-(
[19:02:11] <alex_joni> you just need -10V and +10V supplies
[19:02:42] <alex_joni> you probably need to filter the pwm into an analog smooth voltage first
[19:03:40] <Paragon39> The driver can supply its own +-10v supply :-)
[19:03:51] <alex_joni> good
[19:05:29] <Paragon39> The drivers are Parker OEM670T I picked up a pair on ebay awhile back for like 30ukp so a bit of a bargain if they work. need to test them.
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[19:06:12] <Paragon39> cncbasher: Thanks, I apreciate it!
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[19:13:09] <Paragon39> OK the stepper motors are Cetronic HY200-2220-210 but I can't find there spec info.
[19:17:57] <JT-Shop> Paragon39: the analog output of the 7i33 is -+ 10v
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[19:20:54] <Paragon39> JT-Shop: I was looking at the 7i33TA which goes perfectly with the 7i43 i/o card that I already posses. But was looking to knock something up on the cheap before I outlay the expense for the 7i33.
[19:21:04] <Jymmm> Paragon39: www-app.etsit.upm.es/departamentos/teat/asignaturas/lab-ingel/mpap_hy_lab.pdf
[19:21:11] <JT-Shop> gotcha
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[19:23:17] <Paragon39> Thanks for the link Jymmm
[19:25:09] <Jymmm> Paragon39: Verify using the diagrams on page 14
[19:25:34] <cncbasher> nope cant find it to hand , not where i thought it was
[19:25:45] <cncbasher> i'll keep diggin
[19:25:59] <Jymmm> Paragon39: err pg13
[19:27:01] <cncbasher> but basicly use a rail to rail opamp and offset the input so if 0 - 2.5v go negative and above go positive
[19:27:14] <alex_joni> Jymmm: R not pg13
[19:27:25] <cncbasher> i have the circuit all laid out with values somewhere
[19:29:31] <Paragon39> cncbasher: No probs, thanks for looking though :-)
[19:30:05] <Paragon39> Looking at the pdf now.. but it keeps locking up my browser...
[19:31:22] <awallin_> hi, does anyone know what makes opengl shading look like this: http://dl.dropbox.com/u/5709522/gl_shading.png
[19:32:39] <awallin_> here's a zoom: http://dl.dropbox.com/u/5709522/Screenshot.png
[19:32:52] <awallin_> hm, maybe I am just supplying one vertex with a proper normal...
[19:33:02] <Paragon39> According to the diagram I make the steppers 98 oz/in or there abouts.
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[19:35:17] <alex_joni> awallin_: or maybe neither
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[19:41:14] <awallin_> well this is better now http://dl.dropbox.com/u/5709522/Screenshot2.png I think it had specular ("shiny") lighting mode, this is with ambient...
[19:41:43] <alex_joni> awallin_: that actually looks like something ;)
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[19:42:05] <alex_joni> 1000 FPS is a bit of an exageration, isn't it? :P
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[19:47:03] <awallin_> yeah that value is stuck at 1000, don't know why.... :)
[19:47:48] <awallin_> ummm this don't look right: _lastFrameTime.msecsTo( _lastFrameTime )
[19:47:58] <awallin_> that probably returns zero all the time :)
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[20:03:16] <Jymmm> Has anyone seen anything that has layers laminated together that looks good other than a transformer core?
[20:03:37] <Jymmm> could be just 2-5 layers
[20:04:32] <archivist> varnished plywood
[20:04:59] <Jymmm> Ah, that's a good one. anything else?
[20:07:27] <Jymmm> Anyone happen to know the finished used on wood photo frames that completely engulfs the grain of the wood in black ?
[20:07:37] <cncbasher> Paragon39: found it
[20:07:40] <Jymmm> so no grain at all shows through
[20:07:59] <Paragon39> cncbasher: Great news :-)
[20:08:15] <cncbasher> can you give me an email addy
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[20:21:11] <mrsunshine> wooha, half of the new furnace stomped together, expensive like **** :/
[20:21:33] <mrsunshine> 1200 deg + 1400 deg cement and vermaculite wasnt very cheap :P
[20:22:39] <cncbasher> mrsunshine: Furnace thats my next job
[20:23:15] <mrsunshine> hope this one will work out tho, hoping to be able to melt 20 - 25kg alu in one go =)
[20:23:49] <mrsunshine> if not i still have my small furnace :P
[20:24:00] <archivist> whats the gas cost to melt that much
[20:24:08] <mrsunshine> archivist, oil... :P
[20:24:27] <archivist> moooore expensive unless waste oil
[20:24:33] <mrsunshine> in the small furnace i have done like 10 full crucible melts and the gas canister is not noticable lighter
[20:24:41] <cncbasher> cant eat that many fish & chips fast enought
[20:24:46] <mrsunshine> archivist, free oil from the old house heater
[20:24:53] <mrsunshine> got about 300 liters to burn for free =)
[20:24:59] <archivist> nice
[20:25:50] <mrsunshine> archivist, using a house heater oil burner shouldnt be to expensive realy, it should have heat enough atleast to melt alu and shouldnt pull to much oil =)
[20:25:55] <cncbasher> mrsunshine: does the oil burn clean
[20:26:04] <mrsunshine> as the 2000 or so liter tank in this house kept it worm for almost a whole year
[20:26:18] <archivist> Im messing about scrapping stuff here, and metal cleaning by melting would be nice addition
[20:26:20] <mrsunshine> cncbasher, its the stuff used to heat houses so i guess yes?
[20:27:25] <mrsunshine> havent tested it yet tho
[20:28:13] <mrsunshine> and if that fails i can always throw a waste oil burner on there, (free waste oil as a friend works with repairing tractors etc, can get whole 200 liter drums for free if i require :P )
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[21:24:28] <anonimasu> the molds im gonna mill soon takes 1 hr to upload the program to the controller and 25 minutes to cut
[21:24:31] <anonimasu> -_-
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[21:46:58] <anonimasu> is there anyone that knows something about usb to serial adapters are they all goddamn slow?
[21:48:34] <bill20r3> they are. or rather, the serial device you're plugging into is slow.
[21:49:37] <anonimasu> hm, it supports 115200 baud
[21:49:40] <anonimasu> like 14kb/s
[21:51:46] <anonimasu> that means my control should be able to keep up with what i am supposed to feed it..
[21:51:49] <anonimasu> but the usb is choking it..
[21:52:27] <bill20r3> is it actually set to 115200?
[21:52:29] <anonimasu> yes
[21:52:43] <anonimasu> it wont communicate with the pc with the wrong baudrate set on both parts
[21:52:51] <anonimasu> but the data rate cant be that fast
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[21:53:03] <bill20r3> I dont think the setting on the virtual-usb port, on the pc, actually matters.
[21:53:11] <bill20r3> what chip is the usb-serial based on?
[21:53:32] <bill20r3> most I've seen are pl2303 or ftdi232 chips. I think the ftdi's are better.
[21:53:43] <anonimasu> Moschip MCS7720 16C550 UART Compatible
[21:55:27] <bill20r3> never heard of it. Perhaps it'd be worth trying a ftdi cable.
[21:55:55] <anonimasu> im crippled since it takes me like 10 minutes to transfer 50kb..
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[21:57:40] <bill20r3> brutal.
[21:57:40] <anonimasu> PCW: wow, question if I hook up your thc to a the 4i47 do i just use the frequency +/- and 0 to the board? on the input
[21:57:43] <anonimasu> yep
[21:58:09] <anonimasu> it takes me longer to download programs then cut parts :)
[22:01:09] <anonimasu> PCW: please if you have any time answer since im testing the setup tomorrow and i'd rather not blow anything up :)
[22:01:45] <PCW> Yes use the differential frequency out to an encoder "A" input on the 7I47 (and you can also use the encoder5V power to power the THCAD)
[22:02:00] <bill20r3> did that cable come with the machine, or is it just one you had/bought?
[22:02:09] <anonimasu> i bought one from before
[22:02:21] <anonimasu> (usb adapter)
[22:02:25] <anonimasu> the cable is from heidenhain
[22:03:06] <PCW> And you need to configure the encoder counter that reads the THCADs output to up/down mode
[22:03:55] <anonimasu> I see
[22:04:06] <anonimasu> now all i need is a float switch and i'll be in buisness for cutting
[22:04:07] <anonimasu> :)
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[22:09:56] <anonimasu> moschip->mos-shit
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[22:18:01] <anonimasu> quote.. The problem is that USB is far slower to respond to interrupts, making "Drip-feed" impossible.
[22:20:45] <anonimasu> :)
[22:20:47] <anonimasu> good.
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[22:26:57] <PCW> USB serial interfaces tend to be quite lumpy/quirky
[22:29:48] <TekniQue> what does drip feed mean in CNC terminology?
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[22:48:33] <SWPadnos> TekniQue, it means sending G-code to a controller, usually over a serial port, as the controller needs new commands
[22:48:58] <TekniQue> ah
[22:49:08] <SWPadnos> rather than uploading an entire program to the control and running it from local storage
[22:49:15] <TekniQue> mhm
[22:49:25] <atom1> aka DNC
[22:49:40] <TekniQue> the Boxford mill at the university is like that
[22:49:43] <PCW> wasn't the original drip feed media paper tape?
[22:49:44] <TekniQue> RS232 connected
[22:49:53] <SWPadnos> bbl
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[23:04:01] <FinboySlick> Any recommendations for a tiny dedicated emc install? I'd like the boot drive to be under 250MB.
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[23:21:44] <elmo40> those tiny Intel Atom boards.
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[23:30:37] <Valen> /boot is normally under 250mb
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[23:35:17] <FinboySlick> Valen: Yes, obviously. I meant the entire system.
[23:35:40] <Valen> well no it wasn't obvious
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[23:36:21] <Valen> is there any paticular reason for wanting to limit the disk size of an emc install?
[23:39:18] <Jymmm> Valen: hdd's are expensive
[23:39:49] <FinboySlick> Valen: Heh, I'm just trying to see if my ALIX will run it. I can build myself a custom little distro off of gentoo but if there was anything ready-made that would save me work, I'd have taken it.
[23:40:03] <Valen> use the ubuntu install
[23:40:15] <Valen> just put it on a 4Gb flash or whatever
[23:40:29] <Valen> but I doubt it will run paticularly well
[23:40:35] <Valen> does alix have parallel port?
[23:40:49] <FinboySlick> Valen: Only specific models, but yeah, mine does.
[23:41:15] <Valen> my concern would be the raw CPU speed, if your generating steps theres a fair overhead
[23:41:51] <FinboySlick> Valen: That's part of what I want to test.
[23:42:04] <Valen> they are like a 500mhz cpu arent they?
[23:42:09] <FinboySlick> Yeah.
[23:42:20] <Valen> just look at other stuff
[23:42:32] <Valen> and derate it somewhat from a 500mhz P3
[23:43:05] <FinboySlick> Valen: Not sure. I think it's closer to a low-clocked athlon.
[23:43:27] <Valen> P3 and athlon of that vintage are ~-
[23:43:30] <Valen> ~= rather
[23:43:41] <Valen> P4/netburst and later are less efficent per clock
[23:44:35] <FinboySlick> It does have an okay FPU and 3dnow and a few other things. It's no beast by any means but it's otherwise lying around, doing nothing and 'industrial' enough to live next to my mill without complaining.
[23:45:13] <Jymmm> I'd run the livecd latency test on itbfore doing anything else
[23:45:33] <FinboySlick> Jymmm: First thing on my list past getting it to boot an EMC ready install.
[23:45:34] <Valen> or get a CF > IDE adaptor and run it off a real drive
[23:45:49] <FinboySlick> Valen: Yeah, I'll do that to test.
[23:45:53] <Jymmm> FinboySlick: No, no install, run LIVECD
[23:46:02] <Valen> Jymmm: probably cant
[23:46:12] <Valen> I dont believe they have CD capable interface
[23:46:26] <Jymmm> boot form usb stick
[23:46:27] <FinboySlick> Valen: I don't think it can boot off of a cd... And RAM might become a bit tight.
[23:46:50] <Valen> Personally I use the dual core atom board, for $100 they are the best thing around
[23:46:58] <FinboySlick> It has an IDE port I can hook a drive to.
[23:47:40] <Jymmm> 256MB ram?
[23:47:52] <FinboySlick> Valen: Yeah, I got a few of those at work and they looked pretty awesome for that application. I'd sort of like an usable onboard parport.
[23:47:56] <FinboySlick> Jymmm: Yup.
[23:48:05] <Valen> they are useable
[23:48:52] <Valen> there is/was a bug with something but its been worked around as i recall
[23:48:53] <FinboySlick> Valen: My mill is rated as ~220ipm capable on steppers (it's all linear bearings) so I don't expect the alix to give me anywhere near full capacity.
[23:49:01] <atom1> the D525 has a parport out the back
[23:49:26] <Valen> I use mesa hardware so it'll do whatever I want
[23:49:36] <Valen> (I run servo's not steppers too but eh)
[23:49:50] <Jymmm> http://www.newegg.com/Product/Product.aspx?Item=N82E16813121442
[23:49:51] <FinboySlick> mesa hardware?
[23:50:17] <atom1> Jymmm, that's the one i got
[23:50:31] <FinboySlick> Mesa as in OpenGL? 'hardware'?
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[23:52:07] <Valen> http://www.mesanet.com/
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[23:56:07] <FinboySlick> Valen: Hmmm... Those are cute little boards. The CPU is enough to drive your stuff?
[23:56:37] <atom1> dual core 1.8Ghz
[23:56:44] <atom1> good latency numbers
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[23:57:47] <FinboySlick> atom1: http://www.newegg.com/Product/Product.aspx?Item=N82E16813153187 Is what I'm playing with at work. Sadly, it'll never get hooked to a mill.
[23:58:10] <FinboySlick> Actually, no, that's not quite it.
[23:58:19] <FinboySlick> But it's a dual-core jetway.
[23:59:37] <SWPadnos> one of hte ones that has a DC power input instead of the ATX power connector?