#linuxcnc | Logs for 2013-06-07

[00:31:40] <ssi> woooo
[00:31:48] <ssi> device tree overlays are somewhat conquered
[02:02:48] <DJ9DJ> moin
[04:06:43] <lomach> Hi all, Can anybody tell me the best way to get a high speed analogue signal into linuxcnc. I want to monitor an accelerometer if possible
[04:32:17] <skroon> hi all
[04:38:47] <archivist_herron> lomach, more than one way, what will you be doing with the information
[04:38:58] <Loetmichel> mornin'
[04:47:42] <lomach> archivest_heron - I want to balance my spindle if possible. Only wanted to temporarily get the info into halscope
[05:03:06] <skroon> I was wondering about milling a straight line into a material, your actually doing conventional and climb milling at the same time right?
[05:03:14] <skroon> is this a good/bad thing?
[05:03:24] <skroon> perhaps need special drill to do this?
[06:27:28] <exc> anybody know of any linuxcnc meetups in Germany (Stuttgart) or planned integrator meetings?
[06:28:47] <jdh> exc: The central committee on meetups in Germany has put you in charge of arranging said meetups.
[06:29:56] * jthornton seconds the nomination
[06:30:51] * archivist_herron as a random voter abstains because he wants it in the UK
[06:32:17] <exc> well that
[06:32:25] <jthornton> wouldn't the UK have their own
[06:33:11] <archivist_herron> I did meet rob_h at oen of the model engineer shows but we should do something one day
[06:33:13] <exc> s what I thought ;-) If I can find some / someone interested finds me I will get something started
[06:33:43] <jthornton> exc, have you looked at the user map
[06:33:55] <exc> jthornton, nope, but I
[06:34:03] <exc> 'll do that now
[06:36:22] <exc> link? It is not easily found with the help of google ;-)
[06:36:27] <mhaberler> ssi: what is the semantics of 'somehwat conquered' ;-?
[06:36:53] <jthornton> it's on the main linuxcnc.org page but you have to register to see it
[06:37:18] <exc> ah I have to login
[06:37:38] <jthornton> aye
[07:21:36] <exc> I will contact the guys within 50 km and we
[07:21:43] <exc> 'll take it from there
[07:23:26] <archivist_herron> 50! why not 150km :)
[07:27:41] <exc> figure of speech ;-) I
[07:27:48] <exc> darned keyboard
[07:27:58] <exc> I'll do 200
[07:33:52] <rob_h> should have the UK meet at my works could do with some works right now ;)
[07:37:25] <Crashdemon> hey guys
[07:38:03] <Crashdemon> how can i use current lowering in linuxcnc?
[07:40:00] <cpresser> Crashdemon: stepper? set it at the stepper-driver. its not a software issue
[07:40:49] <Crashdemon> isn't it possible to use the amp enable output?
[07:44:00] <cpresser> sure
[07:44:17] <cpresser> just configure a pin in HAL
[07:44:38] <cpresser> you can even write am comp which detects that there is no motion and sets that pin
[07:45:26] <archivist_herron> rob_h, on condition I get to play with the sliding head :)
[07:45:48] <cpresser> but most drives already do this automatically
[07:46:12] <archivist_herron> Crashdemon, are you sure you want to , losing steps can be the result
[07:46:49] <Crashdemon> actual the current lowering is always on, by default
[07:47:36] * cpresser did disable it
[07:47:46] <cpresser> i shut my machine down when i am not using it. simple as that :)
[07:48:56] <Crashdemon> ok this is also an option :-)
[07:49:18] <archivist_herron> keeps the house warm in winter
[07:49:48] <Crashdemon> but i will try it with hal, but im not experienced with it, it is very powerful
[07:49:59] <cpresser> i have cheaper ways of heating th shop :)
[07:51:59] <rob_h> archivist, thats a deal lol
[07:52:23] <rob_h> i guess ull sit down most of the day with the magazine barfeed now on it :)
[08:10:02] <archivist_herron> rob_h, its running ok then ?
[08:10:41] <rob_h> its not inplace as such yet gota have a move around, get the big crowbar out but iv had it on and moved it and had a play as one does
[08:11:03] <rob_h> barfeeds got deliverd few weeks back, picked up some 4m magazine servo barfeeds on the cheap
[08:11:32] <jthornton> tight fit I'd bet
[08:11:47] <rob_h> also took guards off and gave it a dam good clean out and its getting a touch of pain
[08:11:48] <rob_h> t
[08:12:31] <rob_h> lol yea john but you only need a walk way between machines right? these factorys with huge ammounts of space between machines how wastefull is that ;)
[08:14:22] <jthornton> I have become very frugal with floor space
[08:14:54] <rob_h> besides if no machine sitting on the floor space u only got sweep it ;)
[08:15:03] <jthornton> yea
[08:15:40] <jthornton> if the machines are 1" off the floor you can't sweep or find all the parts that roll under them
[08:15:52] <rob_h> lol ye
[08:16:03] <rob_h> things u find when u move one quite funny
[08:16:31] <rob_h> like other day we had drag a hydrolic tank out one to fix a leak on the pump, and all the allenkeys and spanners we found at the back people had droped over the years
[08:16:52] <jthornton> I have the VMC crawling along at 100IPM rapids and can make a part or two before it trips
[08:17:12] <rob_h> o dear getting alot more worse
[08:17:16] <jthornton> oy
[08:17:35] <rob_h> encoders or tacho in them motors?
[08:17:43] <jthornton> seems to be, I just hope whatever is weak would just die
[08:17:48] <rob_h> ye
[08:17:49] <jthornton> tacho I think
[08:17:55] <jthornton> could be dirty?
[08:17:58] <rob_h> they AC
[08:18:11] <rob_h> maybe or something todo with feedback area
[08:18:17] <jthornton> the servos are DC
[08:18:24] <rob_h> cleaned the brush's
[08:18:34] <rob_h> give them a good dedust inside
[08:18:52] <rob_h> the ones on superslant for ever trying to clean carbon out off the coms
[08:18:54] <jthornton> the Z is the easy one to reach so I'll look at it after while
[08:19:10] <jthornton> brilliant idea mate
[08:19:45] <rob_h> fanuc ones tho are grate, just simens cant seem to make a good motor
[08:21:15] <jthornton> I'm off to the shower to start my day, speak soon and good luck on the bar feeder
[08:21:24] <rob_h> k later
[08:21:33] <rob_h> im off to make more chips
[08:36:33] <L84Supper> whats the consensus here on what <100W laser cutters to recommend for non-DIYers?
[08:37:29] <jdh> 100w yag or 100w co2
[08:37:40] <L84Supper> co2
[08:37:59] <jdh> not that I have an opinion on either, other than wanting one.
[08:38:33] <L84Supper> Jymmm has been pretty happy with his, but I forget the make and model
[08:38:49] <jdh> Jymm was happy about something? Are you sure?
[08:39:30] <L84Supper> well after 387 mods and the exhaust filter :)
[08:41:46] <skunkworks> heh
[08:42:31] <L84Supper> http://tinyurl.com/mzcyamb looks like a good deal
[08:43:13] <jdh> if it is fixable. 8x4 table!
[08:44:10] <L84Supper> it doesn't look like it spent any time under flood waters
[08:45:51] <L84Supper> easy enough conversion to EMC
[08:53:02] <jdh> I was thinking about the $700 keling 40w myself
[08:53:39] <L84Supper> http://tinyurl.com/mjlqwkk $2500 gets you something like this
[08:54:20] <cpresser> L84Supper: i got a machine similar to this one: http://www.ebay.de/itm/Co2-Laser-BS-9060-Deluxe-80W-Arbeitsflache-900mm-X-600-mm-/121053757919?pt=Industriemaschinen&hash=item1c2f5dc1df
[08:54:39] <L84Supper> http://www.automationtechnologiesinc.com/products-page/laser-engraving/40w-co2-laser-machine-software-training
[08:59:47] <jdh> http://www.ebay.com/itm/111091396186
[09:02:45] <jdh> the price is in my range for the keling one. The 50w looks better but the price difference is huge
[09:05:41] <L84Supper> 50 US or Chinese watts? :)
[09:05:51] <JT-Shop> lol
[09:35:00] <archivist_herron> US watts are smaller than imperial watts anyway :)
[09:35:14] <jdh> that's ok, US seconds are longer
[09:43:56] <Thiel> hi all !!!
[09:44:31] <Thiel> question on the thcud component is the setp thcud.requested-vel 30 in mm/min or sec
[09:44:46] <Thiel> mashine is in mm
[09:45:05] <Thiel> setp thcud.vel-tol 10 is this also in mm/min
[09:45:55] <cradek> the manpage says this connects to motion.current-vel, so you can be sure those are mm/sec
[09:46:18] <Thiel> ok
[09:46:19] <cradek> velocities and accelerations are /sec and /sec2 everywhere except in the gcode's F word
[09:46:45] <Thiel> the reaction is var to slow on 4000mm/min
[09:47:11] <Thiel> i run on 30mm/sec acording to you but it moves to slow up and down
[09:48:13] <Thiel> cradek: setp thcud.correction-vel 0.0001 why is this so low
[09:48:40] <Thiel> is this maybe the actuall speed
[09:49:29] <cradek> sorry are you asking me why you set it to a low number? all I can do is read the documentation, I have no knowledge about your setup or how you got it set the way you do
[09:50:26] <cradek> http://www.linuxcnc.org/docs/html/man/man9/thc.9.html
[09:50:32] <Thiel> in all posts i find this low value so what is it for maybe i do try and error
[09:51:12] <cradek> hm, in the manpage, that says units per period, which is a very strange unit
[09:51:35] <cradek> this may be weirder than I expect, sorry, I have never used it
[09:51:43] <cradek> hang around and maybe someone who knows more will help.
[09:52:33] <jdh> ~28 days for most women.
[09:52:36] <Thiel> ok
[09:52:41] <Thiel> Tom_itx: ? online
[09:53:04] <Thiel> tom you use the eagle plasma thc and your component thcud
[09:58:05] <Thiel> got it !!!!
[10:02:44] <jdh> don't forget to leave the solution you found in the logs so others can see it when they search.
[10:11:44] <L84Supper> @ 4:10 watch the effect of thermal expansion from a flashlight on a hollow beam https://www.youtube.com/watch?v=fke49j9AqFw
[10:12:17] <L84Supper> I guess I'll have to start micromachining in the dark from now on
[11:07:16] <mrsun> ey! anyone alive? :)
[11:08:04] <mrsun> got a jog wheel with quadrature .. is the A- B- outputs just the inverse of A+ and B+ ? do i need both to read it? :)
[11:13:05] <jthornton> to tell which direction you are going yes you need both
[11:18:17] <mrsun> both A and B but both the non inverted and the inverted also ?
[11:18:23] <mrsun> so all A+ A- B+ B- ?
[11:25:28] <jthornton> aye you need all for to know direction
[11:35:08] <jdh> you do?
[11:35:17] <Tom_itx> no, you can use either pair or both
[11:35:31] <Tom_itx> if you have differential input you can use both
[11:35:38] <Tom_itx> i have differential input and used one pair
[11:35:49] <jdh> and a bias voltage?
[11:35:53] <Tom_itx> ja
[11:36:45] <Tom_itx> the direction is derived from the fact they are 90 deg out of phase
[11:37:27] <Tom_itx> if you need more direction, get a GPS
[11:38:36] <jdh> or ask us, we'll tell you where to go.
[11:44:10] <Loetmichel> re @ home
[11:48:09] <Tom_itx> mrsun, yes they are the inverse
[12:04:38] <IchGuckLive> hi all B)
[12:16:10] <tjb1> IchGuckLive: hello
[12:16:40] <IchGuckLive> hi
[12:19:08] <Jymmm> L84Supper jdh I have a 30W CO2... ULS M-300, It's self-contained and acts just like a printer.
[12:19:12] <tjb1> Did you need something yesterday?
[12:21:36] <IchGuckLive> tjb1: no i only wanted to know on what vel-tol you are as the cheep plasma thc went off some times at hard corners
[12:22:07] <tjb1> I haven't used mine much but on small intricate parts it was diving so I turned it off for the time being
[12:24:38] <IchGuckLive> the master chief today testet parts that hat height differences at12mm on 100mm length
[12:25:08] <IchGuckLive> and the numbers of delay hysteresis and vel where bad to work out
[12:30:20] <tjtr33> gene78, could you paste an example svg to imagebin.org ? i'll try pdfposter on it.
[12:33:46] <jdh> Jymmm: got pics of any cut objects or engravings? Is that real 30w vs. chinese 40w?
[12:34:52] <IchGuckLive> will the laser getting cheeper
[12:35:12] <IchGuckLive> i woudt like to have one for cutting 3mm metall sheets
[12:36:02] <Jymmm> jdh: Real 30W, I had ULS send me out a laser power meter to measure the output.
[12:36:48] <Jymmm> An illuminary I designed and created out of wood veneer and paper http://i51.tinypic.com/2rqzvw0.jpg
[12:36:54] <Jymmm> My "Teddy Bear" I laser engraved on 12" black granite tile from a photograph... http://i54.tinypic.com/k2mo7n.jpg
[12:37:02] <Jymmm> Laser engraved glass stones - http://i54.tinypic.com/fyl3c0.jpg
[12:37:26] <Jymmm> Laser engraved clear acrylic edge lit night light http://i51.tinypic.com/2jttp2.jpg
[12:38:14] <IchGuckLive> Jymmm: the bear is this one pass only
[12:38:34] <Jymmm> IchGuckLive: Yes.
[12:39:14] <Jymmm> IchGuckLive: Well, what do you mean one-pass, Like not having to go over the same path twice?
[12:39:26] <Jymmm> if so, then yes.
[12:39:46] <jdh> did you cut the acrylic edge lit thingie also?
[12:39:54] <Jymmm> yes
[12:40:16] <jdh> how long to cut an inch?
[12:40:30] <Jymmm> It'll vary
[12:40:47] <Jymmm> Could I use more power, sure.
[12:40:53] <jdh> 2 seconds? 2 minutes? 2 hours?
[12:41:05] <Jymmm> jdh: It'll vary
[12:41:43] <Jymmm> It can every change day by day due to temp, humidity, etc
[12:42:13] <IchGuckLive> humidity on my laserprojektor a big factor
[12:43:28] <jdh> I asked the keling guy about speeds 3 or 4 times, never got an answer from him either
[12:43:53] <jdh> nor would he say how thick it would cut, etc. even with specific material types.
[12:44:04] <Jymmm> jdh: It's not an absolute like it may be with tooling
[12:44:32] <jdh> I understand that, but seconds/minutes/hours should be available, or at least a range
[12:45:00] <jdh> 1" x 1" square outline in clear 1/8" plexiglass
[12:46:31] <Jymmm> jdh: You keep thinking like a mill/lathe, it's light
[12:46:54] <Jymmm> It's not fast due to being 30W if that's what you're asking.
[12:47:11] <jdh> but is not fast 5 minutes or 5 hours
[12:47:51] <Jymmm> could be a lil of each
[12:48:11] <Jymmm> jdh: you keep asking for an absolute, there is none.
[12:48:38] <jdh> I was asking for a range. I included a factor of 60x for imprecision
[12:49:02] <Jymmm> If it was a 250W laser, might be a different factor.
[12:49:19] <jdh> sure, but I was askign about a 30w laser
[12:49:23] <Jymmm> And I keep telling oyu, but you dont want to accept the answer,
[12:49:55] <jdh> so, when you cut somethign, you don't know if it will take an hour or a day?
[12:50:04] <Jymmm> correct
[13:00:46] <Jymmm> jdh: You're looking at it like milling aluminum. But al doens't absorb moisture or thermally expand/contract like plastics do. Can a chainsaw cut al fast, sure but your not going to have a nice edge. Sometimes that's the case here. To say "will it cut in x time" is not an absolute. you could cut fast and have a shitty edge, you could have the vaporized material redeposit itself on to the workpiece, it can smoke and leave soot at the molten
[13:00:46] <Jymmm> edge, it can deform, it can craze, etc. There are multiple factors to acount for.
[13:02:16] <jdh> so for cutting acrylic, do you do multiple passes? or does it know when it is cut through?
[13:04:10] <Jymmm> It doesn't know anything, it's all by feel. I've had 1/4" on one pass some days, and 1/8" in multiple passes. I know what you are asking for, and there is no absolute answer. Keep asking the say question (even if rephrased) is not going to change the answer.
[13:07:46] <Jymmm> If you have a higher wattage 100W+ laser, then those misc factors become less of a factor. I now one that had to jump up to 250W for engraving wood to overcome the the pitch (sap) variations.
[13:07:58] <Jymmm> s/now/know/
[13:10:50] <Jymmm> jdh: Now, the flip side to the coin is you can do some very interesting things with this lil quirks too
[13:11:46] <cpresser> jdh: with my 80W-China-Laser i cut 1/4" acrylic with 10mm/sec at 70% power
[13:11:57] <Jymmm> jdh: I can "bleach" out just the color pigments in fabric to engrave designs/logos into jeans without damaging the fabric.
[13:12:10] <Jymmm> jdh: there ya go cpresser has an answer for ya
[13:12:50] <cpresser> however, i do also change settings depending on the job :)
[13:13:01] <Jymmm> lol
[13:14:02] <cpresser> 12mm Acrylic is also possible. 2mm/sec at 90% power. but that looks ugly :/
[13:14:33] * cpresser has a cheat-cheat for different materials. i found all those values by trial and error. they are not absolute!
[13:14:39] <Jymmm> cpresser: at what DPI?
[13:15:07] <cpresser> Jymmm: cant tell. cheap chinese control. i cant change the pulse-ratio
[13:15:14] <Jymmm> cpresser: ah
[13:15:33] <cpresser> i might do a retrofit. i need to look into hal-streamer
[13:16:00] <Jymmm> cpresser: Hey, when you cut a disc, do you find the start/end point to have a dimple?
[13:16:08] <cpresser> yes, i do
[13:16:24] <cpresser> thats why i do a lead-in and lead-out in the CAD
[13:16:35] <Jymmm> cpresser: Yeah, even the monster hitachi industrial ones do that too.
[13:16:35] <cpresser> but that doesnt solve it 100%
[13:17:23] <cpresser> i am not sure how you can avoid these artifacts
[13:17:52] <cpresser> usually i just change the geometry and have the start/end point at a place where it doesnt matter that much :)
[13:17:59] <Jymmm> cpresser: Have the post-processor convert circles from 'O' into 'C'
[13:18:14] <Jymmm> like a 99.999% circle.
[13:18:36] <Jymmm> cpresser: But such a pita
[13:19:00] <Jymmm> cpresser: Same here
[13:19:03] <cpresser> yep, its a lot of work. but most times i cut squares :)
[13:19:28] <jdh> I get a dimple with endmills
[13:19:31] <cpresser> so its not a big problem for everyday work :)
[13:19:54] <Jymmm> yeah, and most dont notice it anway
[13:19:57] <Jymmm> anyway
[13:20:24] <jdh> 80w is pricey, chinese 40w is relatively cheap. I just wanted a general idea about what it could do.
[13:20:45] <Jymmm> jdh: what do you want it to do?
[13:20:52] <cpresser> depending on the job i also grind the dimples away with a disc-sander
[13:21:04] <Jymmm> cpresser: Ewwwwwwwwwwwwwww
[13:21:15] <jdh> cut 3mm acrylic at the moment.
[13:21:37] <Jymmm> jdh: one? 20? 200? daily? quarterly?
[13:21:46] <jdh> yeah
[13:21:50] <jdh> it's not absolute
[13:22:21] <cpresser> for 3mm you are okay with 40W. but 6mm will be a pita.
[13:22:36] <cpresser> same for 10mm wood/mdf. you can cut it, but not in a nice single pass
[13:23:34] <jdh> I have no immediate needs. Just need a tiny bit of justification for purchasing
[13:24:13] <cpresser> for comparison: this one took 10minutes on my machine: http://imagebin.org/260592
[13:24:26] <cpresser> its 8x10" (200x250mm) 6mm Acrylic
[13:25:03] <jdh> for the cut also, or just the engrave?
[13:25:26] <cpresser> total.
[13:25:39] <cpresser> the cut takes ~2min, the engraving 8min
[13:34:08] <jdh> 40w $700, 80w: $6,000
[15:57:52] <Crashdemon> what causes "joint 2 on limit switch error" error messages?
[15:58:18] <cradek> the joint 2 limit switch signal being true
[15:58:46] <cradek> according to fallible memory, those are something like axis.2.positive-limit-switch or axis.2.negative-limit-switch
[16:02:45] <Crashdemon> yes this error ocours when i'm trying to reference
[16:03:19] <Crashdemon> on z-axis
[16:03:23] <cradek> are you trying to home to a limit switch?
[16:04:15] <Crashdemon> maybe, i've configured it as ref. z + both switches
[16:04:43] <cradek> pastebin your ini and hal files?
[16:04:50] <Crashdemon> sounds wrong?
[16:04:56] <Crashdemon> jop
[16:07:56] <Crashdemon> hal: http://pastebin.com/wbkAejhE
[16:08:32] <Crashdemon> ini: http://pastebin.com/xGnM4L5k
[16:08:45] <cradek> ok you have pin 13 hooked to all of Z home, pos limit and neg limit
[16:08:58] <Crashdemon> yes
[16:09:25] <cradek> in AXIS_2 you have HOME_IGNORE_LIMITS so you should not be getting this error when homing Z. Are you sure you get it when homing Z?
[16:09:26] <Crashdemon> my z-axis also driving into the wrong direction
[16:09:40] <cradek> you can fix that by negating [AXIS_2]SCALE
[16:09:47] <Crashdemon> ok
[16:10:16] <Crashdemon> yes i'm pretty sure this error ocours when ref. z-axis
[16:10:44] <cradek> it's surprising that pins 11 and 12 need inversion and 13 does not. are you sure they are right?
[16:11:55] <cradek> maybe you should watch the both-home-z signal with halmeter and make sure it is TRUE when you are activating the switch and FALSE otherwise
[16:12:24] <Crashdemon> ok i will give it a try
[16:16:59] <Crashdemon> ok, now pin 11 and 12 need no inversion
[16:17:55] <Crashdemon> is it not possible to change scale in stepconf?
[16:18:36] <Crashdemon> the erros stays the same
[16:18:41] <andypugh> Yes, but Stepconf obfuscates it behind pullley tooth numbers and microstepping values in an attempt to be helpful
[16:19:37] <DJ9DJ> gn8
[16:20:53] <Crashdemon> very confusing error, i have no clue what causes this
[16:21:52] <Crashdemon> maybe i should configure z-axis with ref. switches only
[16:22:31] <andypugh> Which LinuxCNC version? (cradek, dind't we have a bug recently where it lied abut which axis was the problem?)
[16:22:43] <jdh> I have Z home up top
[16:23:06] <jdh> maybe Z+ limit also, lower z limit seemed impossible to do well
[16:24:30] <andypugh> Typically Z home/limit is one switch at the top of travel (Z = 0) and the bottom limit is at Z=minus_some_number. And you set the axis maxlimit as zero and minlinit as minus_the_same_number.
[16:24:35] <Crashdemon> actual version of linuxcnc
[16:25:16] <Crashdemon> ok i will fix that
[16:26:39] <andypugh> I think that the bug I am thinking of was unrelated: http://git.linuxcnc.org/gitweb?p=linuxcnc.git;a=commit;h=33d4483ccf856fea23726c3bcdf1ab7c19b855dd
[16:26:48] <andypugh> That was a jogging thing.
[16:28:37] <Crashdemon> isn't possible to debug what this error message causes?
[16:30:49] <andypugh> "joint 2 on limit switch error" means that whatever is connected to axis.2.(pos/neg)-limit-switch-in was true when LinuxCNC last looked. It is quite possibly electrical noice.
[16:30:52] <andypugh> (noise)
[16:32:16] <Crashdemon> pin bouncing could be a possible error?
[16:32:51] <andypugh> it is one possibility.
[16:35:19] <Meduza> Anyone tried to use Intel D2550-based motherboards for LinuxCNC?
[16:37:53] <Crashdemon> i solved the problem by disabling limit switches on z-axis in stepconf
[16:38:11] <Crashdemon> now all went well
[16:38:20] <Crashdemon> thanks guys
[16:40:53] <andypugh> Yes, but....
[16:41:43] <andypugh> That is a "solution" rather like avoiding toothache by shooting yourself in the head.
[16:44:29] <Crashdemon> yes i know, but it works
[16:44:50] <Crashdemon> a fast workaround
[16:50:06] <andypugh> There is a software debounce in HAL, you can set the limit only when the input has held the same value for N cycles of the servo or bas threads.
[16:50:47] <andypugh> http://www.linuxcnc.org/docs/html/man/man9/debounce.9.html
[16:51:05] <andypugh> not the clearest of docs
[16:56:42] <Crashdemon> ok
[17:09:25] <abetusk_w> is there any hope of engraving marble on this type of machine: http://zentoolworks.com/product_info.php?products_id=74 ?
[17:11:32] <Meduza> Is there any known problems with using this motherboard (based on Intel D2550): http://www.asrock.com/mb/Intel/AD2550B-ITX/ with LinuxCNC?
[17:20:04] <andypugh> abetusk_w: Perhaps very slowly. It is a plastic frame and slow motors. We may be getting close to the bird sharpening beak and wearing away a mountain timescale.
[17:20:35] <andypugh> Sorry, not "slow motors" I meant "small motors"
[17:21:30] <abetusk_w> hmm, yeah. Guess I'll just have to try it out
[17:21:33] <abetusk_w> I'm not too hopeful
[17:22:44] <andypugh> Meduza: I don't think anyone here has an exhaustive knowledge of all motherboards.
[17:23:10] <andypugh> Meduza: It is likely to matter a lot less in the near future.
[17:23:34] <Meduza> Nah, i'll dont think so either, it was really more if there is any known problem with the D25xx family of processors :)
[17:23:44] <Meduza> andypugh: OK, what is about to change?
[17:24:36] <andypugh> shifting to support of Xenomai and RT_PREEMPT. LinuxCNC may soon be just another package on stock kernels.
[17:25:48] <PCW> There are video driver problems with Linux and Cedar trail Atoms (25002550,2600,2700 2800 etc) so you are limited to framebuffer support
[17:26:30] <Meduza> Is that a big problem in reality (or can you live with it)?
[17:27:53] <PCW> ask andy, he has a Cedar trail MB I think
[17:27:58] <andypugh> I am living with it on a D2800.
[17:28:16] <Meduza> andypugh: intresting, do you know anywhere i can read more on the upcomping changes? (Honestly i have not updated my last cnc computer since 2007, and that is a now 13 year old laptop)
[17:28:45] <andypugh> But it almost never connects to a monitor. It is on the bookshelf behinf the TV as a development platform.
[17:29:05] <Meduza> I'll think i propably can live with it, as i said my current CNC computer is a 700Mhz P3 laptop with 256Mb RAM...
[17:30:48] <Meduza> Or is there any other chipset that exists on Mini-ITX boards more recent than 2008 that is well supported?
[17:30:49] <andypugh> Meduza: http://thread.gmane.org/gmane.linux.distributions.emc.devel/9522
[17:31:13] <Meduza> thanks andypugh!
[17:31:55] <Meduza> I have built a computer with Intel D525MW for a friend wich worked great, but i'll have a hard time finding a that old motherboard to buy new...?
[17:32:17] <Tom_itx> it was a good one
[17:36:17] <Meduza> yeah, i'll know that was my conclusion at the time, but know it is a few years old and hard to find, and where they have it it is almost double the price it was before..
[17:38:23] <Meduza> I have actually only found one place selling it, and they want 110€ + shipping...
[17:38:37] <Meduza> and does not even tell if they have it in stock
[17:38:58] <andypugh> PCW what is that one you have good results with?
[17:44:24] <PCW> I hate to say since I recommended the ASUS E45M1 as a fast low latency MB (works for me) but others have had troubles with it
[17:44:58] <andypugh> Ah.
[17:45:00] <PCW> a little gun-shy about recomendations
[17:47:38] <PCW> When the Xenomai thing is ironed out there will be many more modern MB choices
[17:49:08] <PCW> the GIGABYTE GA-E350N has been recommend but apparently has trouble with modern screen sizes and Ubunto10.4
[17:51:53] <Meduza> Well right now i only need 1024*768 as i got a really nice industrial monitor that will fit my mill really nice
[17:52:26] <Meduza> I am reading the threads about xenomai and the other changes, and it looks really promising!
[19:39:57] <cbjamo> seen pcw_home
[23:04:01] <L84Supper> pcw_home: we are using a Asus F2A85-v Pro mainboard + A10 APU for RT-Preempt work, we have to finish the RTAI update to v3.8 to catch up with the drivers
[23:05:35] <L84Supper> https://www.asus.com/Motherboards/F2A85V_PRO/
[23:06:01] <L84Supper> http://www.newegg.com/Product/Product.aspx?Item=N82E16819113280&nm_mc=KNC-GoogleAdwords&cm_mmc=KNC-GoogleAdwords-_-pla-_-Processors+-+Desktops-_-N82E16819113280&gclid=COX2jbzH07cCFdFDMgodKhQAIQ
[23:06:57] <pcw_home> How does it do latency wise with RT-Preempt?
[23:08:26] <L84Supper> we'll work on the E seies APU's next
[23:10:45] <L84Supper> we'll post some latency results in a couple of days
[23:11:01] <pcw_home> wow 3/4 of a teraflop
[23:12:42] <L84Supper> it's getting too hot while compiling with the stock cooler
[23:13:07] <L84Supper> using the other cores for image processing while running EMC
[23:13:37] <L84Supper> zedboards arrived to day
[23:13:47] <L84Supper> today even :)
[23:14:06] <L84Supper> http://www.zedboard.org/
[23:15:16] <L84Supper> wish they had 1GB vs only 512MB for DDR3
[23:16:05] <pcw_home> For linuxCNC if its not doing HMI 512 shoud be overkilll
[23:16:21] <pcw_home> should
[23:17:16] <L84Supper> Digilent shipped them overnight, Avnet said 3+ weeks
[23:19:18] <L84Supper> will try them with Linuxcnc on one ARM core and some simple image processing on the other
[23:20:36] <pcw_home> were looking an making an integrated FPGA/ARM system using a simple
[23:20:39] <pcw_home> backplane and cardcage. Do you know any good companies for doing card cages?
[23:21:58] <L84Supper> picked up a couple quad core A-7 1.2GHz A15 Mediatek smartphones, wish they had some IO
[23:22:36] <ssi> I've been working on some bitcoin mining fpga designs recently
[23:22:46] <ssi> working up to where we can build asic controlers for a friend of mine that's taping out a chip
[23:23:02] <L84Supper> pcw_home: something custom in sheet metal?
[23:25:12] <L84Supper> ssi:I was loking at that a few weeks ago, the ASIC route seemed to make the only sense
[23:25:26] <ssi> it is the only worthwhile endeavor nowadays
[23:25:41] <ssi> the first gen asics just started hitting the market and it's tearing the bottom out of the gpu market
[23:26:04] <ssi> even the fpga rig we're designing isnt' going to be anything like profitable
[23:26:20] <ssi> but it'll be a good dry run for figuring out things like inter-chip comms
[23:26:25] <L84Supper> 1K ASIC cluster and tune it just fast enough to mine the most without upsetting the difficulty settings
[23:28:11] <L84Supper> invest $5M to make a few thousand ASIC's, it looked profitable in a few weeks, not sure why somebody in China or Wall St hasn't done it yet
[23:29:23] <ssi> people are doing it
[23:29:29] <ssi> there's at least two vendors with fair scale
[23:29:30] <ssi> bfl and avalon
[23:29:37] <L84Supper> ssi: weren' these guys supposed to have ASIC's and then haven't released them do to unknown factors? http://www.butterflylabs.com/
[23:30:05] <ssi> yeah but they're starting to hit the market
[23:30:08] <ssi> supposedly
[23:30:13] <L84Supper> http://siliconangle.com/blog/2013/05/21/live-butterfly-labs-is-finally-shipping-asic-bitcoin-miners-start-digging/
[23:30:20] <ssi> the network difficulty certainly seems to reflect it
[23:31:26] <ssi> I've got 2.2MH of gpus running, but they're starting to not be so profitable :P
[23:33:45] <Connor> I bought one of this to use on de-burring alum etc.. http://www.harborfreight.com/1-in-x-30-in-belt-sander-60543.html Spent an hour or more trying to get the belt to line up with the back plate.
[23:34:04] <Connor> ended up having to shim the motor to get it to track correctly.
[23:34:14] <Connor> and shim the back plate on one side too.
[23:34:55] <L84Supper> Connor: heh, I had a similar experience
[23:35:04] <Connor> nice little unit.. other than that..
[23:35:07] <ssi> I have one of those
[23:35:15] <ssi> I use it in the hangar for shaping aluminum
[23:35:17] <L84Supper> ended up throwing it away after a project
[23:35:26] <Connor> Also got one of these.. http://www.harborfreight.com/4-inch-x-36-inch-belt-6-inch-disc-sander-97181.html
[23:35:27] <ssi> it's a bit faster than a scotchbrite wheel and much faster than a vixen file :)
[23:35:58] <pcw_home> L84Supper: yeah sheet metal
[23:36:03] <Connor> I had a 6 x 48 that my father-in-law loaned me.. it just too big for my shop.. so.. it's out in the car port right now..
[23:36:18] <L84Supper> believe it or else, they have even lower grade lines of power tools in China
[23:36:47] <L84Supper> pcw_home: we use a shop in Suzhou, they make 1sy 2sy and 1M+
[23:36:56] <Connor> or else? don't you mean believe it or not ?
[23:37:01] <L84Supper> been searching for more shops/factories
[23:37:16] <Tom_itx> is there an easy way to transfer ubuntu from one drive to another?
[23:37:36] <Tom_itx> something like ghost
[23:37:41] <Connor> dd
[23:37:49] <Tom_itx> i can't seem to get ghost to work
[23:38:11] <Connor> http://en.wikipedia.org/wiki/Dd_(Unix)
[23:39:03] <Tom_itx> will it format as well?
[23:39:18] <Connor> it's bit level.
[23:39:20] <L84Supper> Tom_itx: it does a bit for bit copy
[23:39:31] <Tom_itx> ok, similar to ghost then
[23:40:01] <Tom_itx> once it's done do or can i resize the drive to it's full capacity?
[23:40:21] <L84Supper> DD won't do that
[23:41:10] <Connor> You need to be using LVM for that..
[23:41:47] <Connor> lvm lets you resize a partition.. Not sure you can do that after the fact though.
[23:42:04] <L84Supper> http://en.kioskea.net/faq/2036-how-to-resize-a-partition-using-gparted-on-linux
[23:42:15] <L84Supper> be sure to backup first
[23:42:38] <Tom_itx> it is, i'm not worried about it
[23:42:53] <Tom_itx> i can start from the live cd if it doesn't work
[23:42:54] <Connor> well.. I would dd first.. the do the resize on the copy..
[23:43:09] <Connor> that way.. you still have the original.
[23:43:21] <L84Supper> DD always works unless you lose power during the copy
[23:43:21] <Tom_itx> and a spare on a SSD
[23:43:51] <Tom_itx> i got a cheap 500gb drive i was trying to use
[23:44:40] <Tom_itx> does the target drive need to be blank or does it matter?
[23:45:04] <Tom_itx> it's got ntfs on it atm
[23:45:06] <L84Supper> cordless drills in China are sold by the battery voltage
[23:45:35] <L84Supper> the better the battery the slightly higher the price
[23:46:34] <L84Supper> looks like the same actual drill, they just match them with the charger and battery voltage you want
[23:46:58] <Tom_itx> can you put gparted on a thumbdrive or does it need to be a bootable cd?
[23:47:50] <L84Supper> i thinks it's on the live cd
[23:48:03] <ssi> Connor: you guys figure out how to fixture those pulleys?
[23:48:10] <Tom_itx> ok
[23:48:30] <Connor> I'm going to buy a 4" chuck to mount on my 4" rotary.. and we'll make a adapter plate.
[23:49:00] <ssi> yow
[23:49:42] <Connor> I have a make shift adapter plate and took my 3" chuck off of my mini lathe.. but.. the holes for the grub screws didn't turn out very well.. had too much run out..
[23:51:26] <Connor> ssi: Yea.. not sure what else to do.. about the only way to do it ..
[23:54:39] <Connor> now, my question is.. how the heck do you get a 4th axis trammed up with your spindle..
[23:55:07] <L84Supper> pcw_home: what's your PCIe FPGA baord with the most amount of gates? and is there any DDR on board?
[23:56:34] <L84Supper> or PCI
[23:57:37] <ssi> Connor: depends how hard you need to try
[23:57:59] <Connor> You kinda want these to be as dead on as you can get..
[23:58:44] <ssi> well you can chuck a testbar in the chuck, and spin the 4th with two indicators on the bar, and dial it in til it's perfectly parallel to the 4th
[23:58:53] <ssi> ie concentric and parallel, so both indicators run true
[23:59:04] <ssi> if you only use one indicator it can run concentric but conically (not parallel)
[23:59:32] <ssi> then once it's true, you can tram the whole axis to the spindle by running an indicator the length of the bar, like you were tramming in a vise
[23:59:54] <ssi> would need to run it along the front edge and the top edge and tram it in both axes