#linuxcnc | Logs for 2013-07-28

[00:07:00] <abetusk> hey all, have you seen this? http://www.thingiverse.com/thing:112718 . Does anyone have experience with this kind of mechanism?
[00:10:15] <NickParker> kwallace: Ok thanks and you don't have a working bandit to poke at do you? We're hoping to revive my bandit before doing linuxcnc stuff since adapting a working machine is way easier than fixing and adapting simultaneously.
[00:10:28] <NickParker> Right now the best guess is that my 5v supply is dead.
[00:11:03] <NickParker> We had 5v, but no + or - 12 to the bandit then flipped the STANDBY/ON switch on the front panel and lost 5v but gained +/- 12.
[00:11:49] <NickParker> Then we unplugged a damaged cable on the 4th board and plugged it back in, then turned STBY/ON to STBY again and didn't get 5V back. So it may be as simple as the damaged plug being iffy
[00:12:19] <NickParker> or my other theory is that the 5V supply works on startup with no load but somehow dies and stays dead once that switch is flipped.
[00:12:53] <NickParker> when we first had it the leads from the power board to the bandit were all off their terminals, so the 5v might not be able to take any load.
[00:13:27] <NickParker> i actually just thought of that... time to go discuss with dad the EE major. this whole machine is about as old as his degree, so he's really enjoying working with stuff he's familiar with
[00:15:21] <kwallace> I don't have a Bandit in working condition, I think I sold some of it on eBay. Once I got started, it took me about a day to get the axes and VFD working, which was enough to start making chips.
[00:18:21] <WalterN> hmm
[00:18:35] <WalterN> http://www.pololu.com/catalog/product/1478 think thats good enough stepper for the Z-movement for such a machine?
[00:20:02] <CaptHindsight> http://www.surpluscenter.com/item.asp?item=1-2983-50-3&catname=powerTrans
[00:20:02] <CaptHindsight> 1/2"-10 X 36" ACME LEAD SCREW $8.70
[00:20:24] <WalterN> CaptHindsight: heh, yeah... though I'm more worried about the electronics part
[00:21:17] <CaptHindsight> http://www.automationtechnologiesinc.com/products-page/nema-17/nema17-stepper-motor-kl17h247-150-4a-for-3d-printer
[00:21:46] <WalterN> only 76 oz-in?
[00:21:51] <CaptHindsight> http://www.automationtechnologiesinc.com/products-page/stepper-motors/nema-23-bipolar-stepper-motor-156-oz-in-%C2%BC%E2%80%9D-dual-shaft-with-a-flat
[00:22:10] <WalterN> the one I linked is 260 oz-in
[00:22:32] <WalterN> think 150 is enough?
[00:22:53] <CaptHindsight> it's enough to crack through the glass in a vat
[00:24:02] <WalterN> also, I think I would need something like this? http://www.pololu.com/catalog/product/1183
[00:24:13] <CaptHindsight> depends on how large your build stage is and if you're doing projection up through a vat or not
[00:24:48] <WalterN> oh yeah... I'm... undecided I guess...
[00:25:10] <WalterN> if my working surface should be above or below
[00:25:12] <CaptHindsight> http://www.automationtechnologiesinc.com/products-page/kl-stepper-drivers/kl-4030-24-40vdc-3-0a-microstepping-driver
[00:27:54] <CaptHindsight> there are some real deals on ebay for lead screws, a place in FL for 3/8 -16
[00:28:26] <CaptHindsight> ground to fit skateboard bearings
[00:30:14] <CaptHindsight> http://www.automationtechnologiesinc.com/products-page/ballscrew-supports
[00:30:24] <WalterN> oh woah, thats a nice stepper motor driver
[00:30:31] <WalterN> will it work with the 7i77?
[00:30:55] <CaptHindsight> http://www.automationtechnologiesinc.com/products-page/ballscrews-nuts
[00:31:25] <CaptHindsight> they just need Step and Dir, they also have an Enable
[00:33:23] <WalterN> hmm
[00:33:41] <CaptHindsight> lots of linear bearings in ebay, some with 100's rating 10-100x you'll ever place on them for cheap
[00:34:11] <WalterN> yeah
[00:34:13] <CaptHindsight> some with load ratings 10-100x you'll ever place on them for cheap
[00:38:19] <CaptHindsight> http://www.ebay.com/itm/Newport-CNC-Translation-Stage-160mm-6-299-Linear-Travel-Parker-Servo-NEMA17-/151087557989?pt=LH_DefaultDomain_0&hash=item232d852d65 or something like this, just add amp
[00:39:01] <WalterN> and control... heh
[00:43:37] <WalterN> CaptHindsight: I suppose if I submerse the part as its being built up it wouldent require supports really
[00:44:13] <WalterN> as apposed to pulling it out (like the form1)
[02:06:08] <DJ9DJ> moin
[04:53:18] <RyanS> Is that true if I try to press fit steel into cast-iron the latter will crack ?
[04:54:02] <archivist> depends
[04:57:09] <RyanS> Someone recommended using loctite retention compound ... fyi the part will be subjected toaxial load, not torsional
[04:58:34] <archivist> cast is weaker in tension so the lump of cast has to be big enough for the press fit
[05:00:46] <RyanS> 120mm, 25mm thick, 30mm steel shaft. Actually I don't have a shop press, might just use the loctite
[07:13:42] * jthornton went to see Ray Stevens last night and had a good time
[08:55:11] <Mikeggg> I didn't know the quit making those neat little intel atom boards: http://www.newegg.com/Product/Product.aspx?Item=N82E16813121442&Tpk=D525MW
[08:56:45] <Mikeggg> do we have a new darling?
[09:18:47] <Mikeggg> Amazon has them, but not as cheap as they used to be
[09:26:46] <skunkworks> Mikeggg: there is a new config with spindle rpm.. (for the emco lathe)
[09:28:11] <skunkworks> I think there should be a -at speed setup.. but I think it should just check to see if the spindle is running at all.... (the spindle speed is only selected by pullys)
[09:29:37] <skunkworks> there could be a setup that makes sure the spindle speed in gcode is within a certain window (within the pullly ranges) but that might be too confusing..
[09:29:39] <Mikeggg> cool. So I picked up my machine Friday. Looks like it's a serial interface? :(
[09:29:59] <Mikeggg> So i dunno. was just about to go dive into it and see whats what
[09:30:44] <skunkworks> I think if You want to try it out with linuxcnc - you are going to have to drive the stepper drives directly.. (doesn't the thing have it's own control in it?)
[09:32:06] <Mikeggg> yeah, I think driving the steppers directly will be a good option. Machine didn't come with any controller
[09:32:31] <Mikeggg> it's got some electronics in the enclosure. drives I think
[09:34:11] <Mikeggg> where did you stash the new lathe config?
[09:35:01] <Mikeggg> bbl
[09:50:56] <skunkworks> Mikeggg: http://www.electronicsam.com/images/emco/linuxcnc_configs/
[09:51:37] <skunkworks> I have not put the spindle meter in the step-morph config yet.
[11:39:20] <andypugh> pcw_home: I was setting up my X-axis motor earlier and was a bit puzzled to find that with 8i20.angle and 8i20.current set manually, the motor was locked at 0.5A 0 degrees but free at -0.5A 0 degrees, but at 90 degrees the situation was reversed. Does this sound like one of the H-bridge elements is dead?
[11:39:54] <andypugh> I _think_ this is one of the original sample 8i20s, but I don't know if it has ever done any actual work.
[11:40:45] <andypugh> I probably need to set it up indoors with a less lethal voltage and do some experiments.
[11:52:55] <IchGuckLive> hi all
[11:54:48] <JT-Shop> http://www.youtube.com/watch?v=DUDtFdnn9oQ
[11:54:49] <Tecan> (DUDtFdnn9oQ) "Woody Guthrie - Car Song" by "AshburyPark" is "Music" - Length: 0:01:51
[12:28:45] <IchGuckLive> more loggers then people !
[12:42:35] <jp_> hey guys, Thinking of selling some of my mesa stuff. anyone interested?
[12:44:13] <jp_> 7i29, 5i23, some 7i37's
[12:46:49] <IchGuckLive> Where are you in the world
[12:47:30] <jp_> toronto canada
[13:15:55] <IchGuckLive> im off have a nice sunday
[14:31:14] <WalterN> what is an analog servo?
[14:31:40] <JT-Shop-2> just testing the heaters in the cleaning tank and I lost a cup of water
[14:39:42] <jp_> WalterN: an servo and drive that uses 0-10V signal to command position,velocity or torque
[14:40:16] <WalterN> meh... I'm not really finding any information on what an analog servo motor is, all I'm finding is a bunch of stuff that says it will control analog servo motors
[14:41:10] <jp_> servos are servo's they are talking about what kind of input the drive or amplifier will take in
[14:47:58] <WalterN> is this the same thing thing? http://www.rchelicopterfun.com/rc-servos.html
[14:48:51] <jp_> there are two basic types of servo motors Brush DC and brushless AC
[14:49:06] <jp_> those are DC
[14:51:00] <jp_> Sorry i thought you were talking Industrial motors
[14:51:07] <WalterN> I am
[14:51:22] <WalterN> I just cant find any information thats specific to industrial analog servos
[14:51:47] <jp_> what do you want to know
[14:51:53] <WalterN> and what it means to be an analog servo, compared to a digital one
[14:53:14] <WalterN> what do I want to know? mostly what the control signal looks like
[14:54:51] <skunkworks> it isn't the 'servo' servos are coils and maganets.. The drive is what is determining if it is 'analog' or digital..'
[14:55:16] <jp_> Yes
[14:55:44] <skunkworks> analog could be +/-10v or PWM. Digital could be a ton of things from serial to canbus to smart serial to whatever.
[14:55:46] <jp_> thats what i was tying to tell him. Analog is jut an input command
[14:56:27] <WalterN> when you say +/-10v what does that mean?
[14:57:06] <jp_> -10V = Max neg command +10V = max positive command
[14:57:26] <jp_> it could be commanding position, velocity or torque
[14:57:31] <skunkworks> and that could be max current or voltage or velocity...
[14:57:54] <jp_> depending on the configuration of the drive
[14:57:59] <skunkworks> right
[14:58:14] <jp_> look up a manual for a simple servo drive
[14:58:27] <WalterN> erm... pulsed at +-10volts?
[14:58:41] <jp_> no DC 10V
[14:59:16] <jp_> think of a pot contolling the voltage
[14:59:42] <jp_> 0v = no command
[15:00:02] <jp_> 5V = half positive comand
[15:00:11] <jp_> 10V = full pos command
[15:00:24] <jp_> -5V half neg command
[15:00:41] <jp_> -10V = full neg command
[15:00:44] <WalterN> ok, thats what I thought
[15:00:59] <WalterN> 2.5v is 1/4
[15:01:06] <jp_> yup
[15:01:19] <WalterN> in either direction, depending on sign
[15:01:29] <jp_> understand what your commanding
[15:01:45] <jp_> it could be many different things
[15:02:08] <jp_> look at a manual for an industrial drive
[15:02:41] <jp_> try a allen bradley kenitix 300 or a siemens drive
[15:03:36] <WalterN> does that kind of controller exist for stepper motors?
[15:04:18] <jp_> not that i know of but i try not to play with steppers too much
[15:04:39] <WalterN> hmm
[15:04:48] <jp_> i think someone here has played with closed loop steppers using hal
[15:05:17] <jp_> but im sure it was a step/direction setup
[15:06:26] <jp_> actually you can get stepper drive that take in analog
[15:06:32] <jp_> i have 4 of them
[15:06:37] <jp_> what was i thinking
[15:09:13] <andypugh> At last. After rather more than 2 years: http://youtu.be/X0celdfZmkA
[15:09:15] <Tecan> (X0celdfZmkA) "Harrison Demo" by "andy pugh" is "Tech" - Length: 0:02:04
[15:10:11] <skunkworks> andypugh: Nice work! are you happy with your x axis design?
[15:10:17] <andypugh> Yes.
[15:10:48] <andypugh> I am fairly happy with all of it, but ecstatic with the toolchanger :-)
[15:12:35] <jp_> andypugh: what did you use on the knee
[15:13:40] <andypugh> It's a lot like the X, a rotating nut. The nut is above the "deck" but the motor is underneath and drives the nut via a tube coaxial with the ballscrew.
[15:14:33] <jp_> cool
[15:19:13] <andypugh> I still need to machine the steady-bracket for the -X end of the table. That will include a tightening / tool length measuring station for the toolholders.
[15:19:37] <skunkworks> what is the tool changer?
[15:19:59] <andypugh> Well, the actual tool-changer is an Andy. I was meaning the pneumatic drawbar.
[15:20:17] <skunkworks> http://www.youtube.com/watch?v=pxrzJ_KfcQ0
[15:20:19] <skunkworks> heh
[15:20:27] <andypugh> That's the one.
[15:21:20] <andypugh> Blimey! Was that really exactly 3 years ago?
[15:21:44] <Tecan> (pxrzJ_KfcQ0) "Harrison retrofit automatic drawbar" by "andy pugh" is "Tech" - Length: 0:01:27
[15:21:52] <skunkworks> heh
[15:23:15] <skunkworks> Didn't I meet you in wichita? ;)
[15:23:25] <cradek> hey I know that guy
[15:25:03] <WalterN> jp_: you have 4 of them? how does that work?
[15:25:36] <jp_> for a sec i thought William h Macy was into cnc
[15:26:03] <Tom_itx> andypugh, ready to start cutting parts now?
[15:26:58] <andypugh> Tom_itx: Yes, though I have forgotten what it was I wanted to make :-)
[15:27:18] <jp_> WalterN: Dont know never used analog input on those stepper drives. im sure it just controls the speed of the motor
[15:28:36] <skunkworks> linuxcnc can control steppers in a similar way... if you have feedback - you can command the steppers in velocity mode (instead of position..)
[15:30:19] <skunkworks> but that is internal to linuxcnc... - the interface to the drive is still step/dir usually
[15:30:47] <WalterN> yeah... hmm
[15:32:24] <WalterN> might as well use a servo in that case
[15:32:50] <skunkworks> http://www.electronicsam.com/images/emco/EmcoSpindleRPM.JPG
[15:32:58] <skunkworks> pretty exciting...
[15:33:02] <skunkworks> ;)
[15:33:21] <skunkworks> funny that the rpm says 285 when it should be around 250
[15:33:39] <skunkworks> wonder if it is a 50 vs 60hz issue
[15:33:48] <WalterN> that would really mess with tapping
[15:34:16] <skunkworks> WalterN: what would?
[15:34:40] <WalterN> going 280RPM instead of 250... heh
[15:35:05] <skunkworks> na - rigid tapping on linuxcnc really doesn't care about spindle rpm..
[15:35:15] <skunkworks> Other than accel/decell time..
[15:36:10] <skunkworks> although rigid tapping on this lathe isn't possible because of the single channel encoder. (index + 100 line)
[15:36:39] <skunkworks> I would have to add a sensor.
[15:38:17] <skunkworks> it threads nice though... https://www.youtube.com/watch?v=Z_LxyosF2yc
[15:39:28] <spack> how does linuxcnc do rigid tapping
[15:40:04] <spack> i mean without considering spindle speed
[15:41:01] <WalterN> skunkworks: thats pretty noisy... heh... unless the microphone is extra sensitive
[15:41:56] <skunkworks> spack: well - it 'gears' the axis to the spindle at what ever ratio you pick (in regards to tapping it is the pitch)
[15:43:03] <skunkworks> so it doesn't matter what rpm the spinde is running - as long as the axis can keep up.
[15:45:09] <cradek> that's one loose thread
[15:45:27] <skunkworks> cradek: yes. he wanted to make sure the nut went on.. :)
[15:45:32] <WalterN> jp_: well... I'm just trying to figure out what I want to do with controlling a stepper (or servo) with the mesa 7i77... reason for going with it in the first place is because I need the analog for the galvos
[15:47:34] <skunkworks> get a servo and amc drive from ebay
[15:49:31] <andypugh> Any servo/drive pair should work.
[15:50:06] <andypugh> (as long as they take analogue voltage). What I was meaning to say is that buying them as a pair is a wise move.
[15:50:48] <WalterN> is there a good place to get that thats not ebay?
[15:51:18] <andypugh> I don't know of anywhere better for second-hand stuff
[15:51:51] <andypugh> http://www.ebay.com/itm/1-Yaskawa-Servopack-SGDA-04AS-1-SGM-04VGNK51-Motor-/310712580952
[15:52:03] <skunkworks> are you one of those ebay haters? :)
[15:56:08] <WalterN> kinda
[16:01:37] <WalterN> could I just use a couple of the digitial IO pins on the 7i77 to control a stepper motor?
[16:02:20] <andypugh> Yes, but then you could also use a 7i77 / 7i76 bitfile on the 5i25 and use the step-dir signals from the second header.
[16:02:45] <andypugh> (You don't actually _need_ a step-mode daughterbaord)
[16:03:30] <WalterN> bitfile?
[16:03:59] <andypugh> However, the 7i78 is only $69 and might make life easier.
[16:04:05] <andypugh> Firmware.
[16:04:36] <andypugh> You can change the firmware on the 5i25 to support different daughterbaords.
[16:04:37] <DJ9DJ> gn8
[16:04:53] <WalterN> yeah
[16:05:12] <WalterN> the only difference is that I'd use the 6i25 because no PCI
[16:06:33] <andypugh> Though I can't see a 7i77_7i78.bit file. The 7i77_7i76 one might work. It will cetainly have all the modules you need for both servo and stepper.
[16:08:52] <skunkworks> andypugh: how does that work? I thought the interface between the 5i25 and the daughter boards was some sort of protocol.
[16:09:53] <andypugh> The gpio is smart-serial. Encoders, PWM, step-dir are the same as they have always been.
[16:10:06] <skunkworks> oh - cool
[16:10:43] <andypugh> I am not sure if the 7i77 analogue outputs are smart-serial or PWM.
[16:12:13] <WalterN> so I could repurpose one of the analog out things on the 7i77 to be digital?
[16:13:12] <skunkworks> WalterN: andy is talking about using the 2nd port of the 5i25 to drive steppers (step/dir)
[16:13:34] <WalterN> oh ok... hmm
[16:14:23] <andypugh> If 1khz step rate is enough then you could simply use software stepgen on gpio, too.
[16:15:24] <WalterN> http://www.automationtechnologiesinc.com/products-page/kl-stepper-drivers/kl-4030-24-40vdc-3-0a-microstepping-driver
[16:15:34] <WalterN> says "Pulse input frequency up to 200 KHz"
[16:18:24] <WalterN> herm
[16:22:12] <WalterN> "The 6I25 can be completely software compatible with the 5I25 if 5I25 bitfiles are loaded in the 6I25's EEPROM, and its PCI clock is set for 33 MHz. This is the currentdefault setup of 6I25 cards."
[16:22:27] <WalterN> so 5i25 bitfiles will work
[16:22:43] <NickParker> what's the difference between 5i25 and 6i25?
[16:22:50] <WalterN> PCI vs PCIe
[16:22:53] <andypugh> 5i25 is PCI, 6i25 is PCIe
[16:22:56] <WalterN> mostly
[16:23:20] <jp_> is ther an ethernet based card yet?
[16:23:33] <jp_> supported bu lcnc?
[16:25:37] <andypugh> 7i80
[16:25:51] <andypugh> I have one, but haven't tried to use it yet.
[16:26:49] <andypugh> As far as I know it only works with the Xenomai "flavour" of linuxCNC, so will only be supported propely in 2.6 (and maybe not even then)
[16:28:06] <WalterN> so I could run that stepper driver directly from the 6i25?
[16:31:59] <andypugh> WalterN: Yes, but only at 300rpm.
[16:32:14] <WalterN> at the most?
[16:32:18] <andypugh> Ah, wait. What was the question again?
[16:33:15] <WalterN> 6i25 -> stepper driver (that I linked) -> stepper motor
[16:33:55] <WalterN> its the 6i25 -> stepper driver that I know almost nothing about... never done anything like this before
[16:34:35] <andypugh> You can't run the stepper "direct" from the 6i25, you need a stepper driver. You can run the stepper driver using wires that connect directly to the 6i25, if you use the right firmware. In that mode there are no stepper speed limits that matter. You can also connect the stepper drive to the 7i77 GPIO, and _that_ arrangment is limited to 300rpm.
[16:35:18] <WalterN> what is the 7i77 GPIO?
[16:35:33] <WalterN> cause that would be fine too
[16:36:05] <andypugh> I thought you had a 7i77?
[16:36:12] <WalterN> I dont have anything
[16:36:23] <WalterN> getting ready to buy all the things though :P
[16:36:46] <andypugh> Right.
[16:37:12] <WalterN> I will be getting the 7i77 and the 6i25
[16:40:01] <andypugh> It's a pity you are anti-ebay. I am pretty sure that a small servopack set is what you want.
[16:40:29] <WalterN> have a linky?
[16:47:00] <andypugh> Something like this: http://www.ebay.co.uk/itm/Leadshine-90W-brushless-DC-servo-set-drive-motor-/300528856601?pt=LH_DefaultDomain_0&hash=item45f8ea6e19
[16:47:14] <andypugh> But don't buy that one, it is a step-dir drive :-/
[16:49:50] <andypugh> free shipping from Korea: http://www.ebay.co.uk/itm/161048641611 Might be a bit small
[16:51:28] <WalterN> what are the specs for the servo?
[16:51:36] <WalterN> torque and stuff
[16:52:40] <WalterN> .3 newton meters
[16:53:12] <WalterN> herm
[16:53:49] <andypugh> Bear in mind that servos run a lot faster, so you can get more torque with gearing.
[16:54:08] <WalterN> yeah
[16:54:34] <andypugh> And the torque doesn't droop with speed like a stepper.
[16:55:33] <andypugh> Did you see the video of my milling machine? Those servos are rated at 2.5Nm, but you would wave that mass of metal about like that with a 2.5Nm stepper.
[16:55:47] <andypugh> (would _not_)
[16:56:48] <WalterN> I think a stepper would be just as good in this case
[16:57:17] <WalterN> there is no tension being applied
[16:57:38] <WalterN> or force rather
[16:59:32] <andypugh> A little servo might be smoother.
[16:59:59] <andypugh> But a stepper is almost certianly fine.
[17:00:03] <WalterN> its for a rapid prototyping machine, for the Z movement
[17:00:13] <WalterN> nothing special
[17:00:21] <andypugh> I think I would go with using the 7i77 gpio and a software stepgen.
[17:00:42] <WalterN> what is the 7i77 gpio anyway?
[17:01:06] <andypugh> (The jog-wheel on my milling machine uses GPIO and a software encoder-counter running at the 1kHz thread rate. It works fine)
[17:01:14] <andypugh> It's the GPIO on the 7i77?
[17:01:28] <WalterN> oh, general purpose IO
[17:03:58] <WalterN> alright
[17:05:18] <WalterN> how would the software stepgen work?
[17:07:00] <andypugh> The normal way, just like when you are using a parallel port
[17:09:57] <WalterN> so... how would a parallel port for that work then?
[17:11:53] <andypugh> I don't understand the question.
[17:12:58] <WalterN> I mean... is there some configuration with linuxCNC to do the "software stepgen"?
[17:13:05] <andypugh> Yes
[17:15:29] <andypugh> http://www.linuxcnc.org/docs/html/hal/rtcomps.html#_stepgen_a_id_sec_stepgen_a
[17:40:44] <Mikeggg> PCW: can you recommend a panel-mount pass through for the super port cable? Also, do you have like 18" or 3' cable for inside the enclosure?
[17:42:34] <CaptHindsight> http://www.automationtechnologiesinc.com/products-page/nema23-m-dc-servo-motor
[17:42:52] <Mikeggg> skunkworks: I think we are going to scrub the stock serial interface on the emco mill
[17:43:35] <CaptHindsight> WalterN: ^^ another non ebay option
[18:14:13] <skunkworks> Mikeggg: are the drives similar to the lathe? they are 4 phase input - you control the coils..
[18:29:12] <skunkworks> http://www.electronicsam.com/images/emco/fusee.JPG
[18:29:26] <skunkworks> jmk's program
[18:38:55] <Mikeggg> hmmm dunno. There was like a 10 pin connector going from the RS422 reader board to the drive board
[18:39:08] <Mikeggg> then each motor had three leads
[18:39:15] <Mikeggg> definitely steppers though
[18:41:56] <Mikeggg> brb, grilled antelope wrapped in bacon!
[19:08:49] <Mikeggg> wait, so the interface with the control card isn't step and direction? You control a pair of coils and the driver figures out how to energize the three coils?
[19:10:05] <skunkworks> well - the lathe is 4 coils.. So I don't know what you have.
[19:11:07] <Mikeggg> 4 coils on the motor? The mill motor had three wires + GND
[19:13:18] <NickParker> good news everybody: my mill turns on, and the steppers make the "i'm holding position" buzzing noise.
[19:13:28] <NickParker> I'm waiting until I can talk to the previous owner to find out how to jog the axises around
[19:13:45] <NickParker> turns out the ONLY issue with the bandit controller was a charred connector that was adding resistance to the 5V power supply
[19:16:24] <skunkworks> Mikeggg: they do make 3 phase stepping motors
[19:16:57] <Mikeggg> I'm pretty sure that's what these are
[19:17:25] <skunkworks> emco used some odd hardware..
[19:17:44] <Mikeggg> heh, but it's all packaged very nicely
[19:18:16] <skunkworks> the lathe has 72 deg steppers
[19:18:27] <Mikeggg> there's also some kind of prox sensor on the pulley for the leadscrews
[19:19:55] <Mikeggg> I guess we need to figure out if the drives will work on step / dir
[19:22:57] <kwallace2> NickParker: So you have a working stock Bandit system?
[19:24:57] <kwallace2> I may still have my Bandit user's manual around here somewhere. I'll look for it after dinner.
[19:40:55] <NickParker> k thanks wallace
[19:41:11] <NickParker> and yep, working bandit
[19:44:25] <nspiel> hi, does anyone have experience with linux cnc driving a scara robot
[19:46:29] <andypugh> Yes someone does, but I am not sure that they are here online now.
[19:46:55] <nspiel> any idea what the best way to contact them is or when they will be back
[19:47:09] <andypugh> I don't even know specific names.
[19:47:45] <nspiel> what is the best way to interface a computer with linux cnc on it to the associated motor drivers and encoders?
[19:47:50] <andypugh> There is a sample config for a Scara robot in the config picker, though.
[19:48:01] <nspiel> yep i saw it, thanks
[19:48:35] <andypugh> 'Best" depends on yur situation.
[19:49:05] <andypugh> If you are very budget-constrained then you can do a lot with just a parallel port.
[19:50:15] <andypugh> I can say that LinuxCNC does not support _any_ USB devices for anything other than Human-interface use.
[19:50:50] <andypugh> There is a partial list of supported hardware here: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?LinuxCNC_Supported_Hardware
[19:51:50] <nspiel> great thanks. Basically right now, i have a scara robot arm with working hardware, dc motors drivers and encoders but i am trying to find the best option to interface with it
[19:52:26] <andypugh> What control signals do the motors take?
[19:52:42] <andypugh> (The motor drives, I mean)
[19:52:49] <nspiel> pwm
[19:52:52] <nspiel> 5 volt logic
[19:53:14] <andypugh> Single channel, or 3 phases?
[19:54:14] <andypugh> (or 2 phases and invent the third)
[19:56:00] <nspiel> https://www.sparkfun.com/products/9107
[19:57:25] <Tom_itx> i wonder how well that would work on a sherline spindle motor
[19:57:42] <Tom_itx> meh, voltage too low
[19:59:02] <andypugh> 40kHz max PWM frequency is in the parallel port / software realm
[20:01:49] <nspiel> so i could run a parallel cable from the computer? what about a parallel to usb cable?
[20:02:10] <andypugh> Nooooo!
[20:03:26] <nspiel> huh
[20:03:42] <andypugh> (USB - parallel cables emulate P-port printer control data based on USB data. They do not give you the pin-by-pin control that you need to use the parallel port as individual IO bits.
[20:05:28] <nspiel> have u heard of mesa io board
[20:05:29] <nspiel> s
[20:05:47] <andypugh> Yes.
[20:05:52] <Tom_itx> they are awesome
[20:06:24] <nspiel> i have some but have no idea how to use them yet. they were in a box of stuff that i got with my scara arm
[20:06:28] <nspiel> i have two of them
[20:06:41] <Tom_itx> identify them
[20:06:52] <Tom_itx> someone here can help you with em
[20:07:00] <andypugh> But I recommend them so often that it embarasses me, as I think there might be people who think I work for them.
[20:07:10] <Tom_itx> you don't?
[20:07:11] <Tom_itx> :)
[20:07:17] <nspiel> hahaha
[20:07:23] <andypugh> Yeah, I wrote about half of the drivers for the Mesa boards.
[20:07:42] <nspiel> that is awesome!
[20:08:03] <nspiel> thanks lol
[20:08:05] <andypugh> (Seb did the clever stuff, I just added on slightly different copies as Mesa added new features)
[20:08:53] <Tom_itx> andy was seb at the fest?
[20:08:59] <andypugh> Yes
[20:09:25] <Tom_itx> i'm not sure which face he was :)
[20:09:32] <Tom_itx> too many new ones to keep track of
[20:14:45] <Tecan> http://i.imgur.com/MYnF4Kd.jpg
[20:15:40] <andypugh> Tom_itx: http://www.electronicsam.com/images/KandT/Fest2013/DSC_3866.JPG Black T-shirt and spectacles.
[20:16:01] <nspiel> what is that machine
[20:16:09] <Tom_itx> ahh ok
[20:16:37] <Tom_itx> nspiel a reprap
[20:16:59] <andypugh> It looks like a 3D printer, but with basically no "engineering" at all.
[20:17:15] <Tom_itx> andypugh, he was across from you in the conference room iirc
[20:17:21] <andypugh> Aye
[20:18:32] <andypugh> I put "engineering" in quotes because the lack of conventional machined parts is really impressive.
[20:19:50] <Tom_itx> some of it looks held together with that moldable plastic you can reheat and reuse
[20:19:51] <andypugh> The "Oh, it's in far enough" hammered-over nail is a nice touch.
[20:20:21] <Tom_itx> duct tape board mounts
[20:20:31] <andypugh> I think it is pretty much all held together with that ("Polymorph" ?)
[20:20:41] <Tom_itx> that may be the stuff
[20:21:26] <andypugh> The bearing with a loop of polymorph through it is genius. That alone forgives any other inelegance.
[20:21:56] <nspiel> i am having a lot of trouble finding these mesa boards i have
[20:21:58] <Tom_itx> haha, just noticed that
[20:22:11] <Tom_itx> nspiel what's the number on them?
[20:22:20] <andypugh> nspiel: I did wonder what had happened to you :-)
[20:22:37] <nspiel> 7125
[20:22:49] <nspiel> i have been taking them out of their casing
[20:24:20] <andypugh> The 7i25 is a motor control H-bridge. Odd you have that as well as the Sparkfun drive.
[20:25:33] <andypugh> 7i25 is 3A / 48V
[20:25:42] <nspiel> i was going to order the sparkfun driver
[20:25:50] <nspiel> to hook up to it as well
[20:26:00] <Tom_itx> http://www.mesanet.com/
[20:26:03] <andypugh> I don't think you need to if you have enough 7i25s
[20:26:12] <Tom_itx> the data sheet for it is in the 'motion control' section
[20:26:25] <andypugh> One 7i25 can drive two otors.
[20:26:32] <andypugh> (motors)
[20:26:44] <nspiel> i have two of the 7i25 and four motors
[20:26:48] <nspiel> yep
[20:26:51] <nspiel> then i have enough
[20:28:21] <nspiel> weird.... so what else do i need besides my encoders, dc motors, arm hardare, and these mesa boards? I also have a very big power supply
[20:28:30] <andypugh> You also need a PCI card. Something like a 5i20, 5i22, 5i23. Any sign of that?
[20:28:54] <nspiel> maybe? would it be made by mesa
[20:28:59] <andypugh> Yes
[20:29:22] <nspiel> no, no sign of that
[20:31:43] <andypugh> You would need to add a 5i23 and (probably) a 7i47 to complete the set
[20:32:06] <nspiel> where can i get those?
[20:32:16] <andypugh> I guess that the 5i23 / 5i20 / 5i22 was inside the PC case and disappeared with it.
[20:32:43] <nspiel> :/
[20:32:54] <andypugh> Which country are you in?
[20:33:14] <nspiel> USA
[20:33:38] <andypugh> In that case you might as well order direct from www.mesanet.com
[20:34:06] <andypugh> There is a web-shop at shop.mesanet.com but it appears to still be under construction.
[20:35:12] <andypugh> pcw_home: Are you awake?
[20:35:54] <Tom_itx> should be it's only 6:20 there
[20:36:28] <nspiel> how is a 7i47 only 69$ and the 5i23 245
[20:37:05] <Tom_itx> the 7i47 is a daughter card
[20:37:20] <Tom_itx> Rs422 interface
[20:37:29] <andypugh> The 5i23 is a properly clever PCI card. It is basically a separate realtime-computer that does all the time-critical stuff like PWM generation.
[20:38:05] <nspiel> so what is the best way to go? i would rather spend less money if possible but i honestly have no idea how to hook this up
[20:38:05] <andypugh> The 5i20 is cheaper, I think
[20:38:46] <Tom_itx> nspiel you're in the right place
[20:39:34] <andypugh> You need a 3-port 50-pin Mesa card to control the motor drives, and then you need a third port to connect the encoders and general IO (which is where the 7i47 comes in)
[20:40:05] <nspiel> so i need both?
[20:40:29] <andypugh> There are cheaper Mesa FPGA cards, the 5i25 is less than $100 and does much the same as the 5i23, but only has 2 x 17 pin ports, not 3 x 24 pin ones for the cards you already have.
[20:41:22] <andypugh> You definitley need one of the 3 x 50 pin connector "Anything IO" cards.
[20:41:35] <Tom_itx> andypugh, which is cheaper, going the 5i25 route or trying to salvage his 7i47 card with one of the other fpga boards?
[20:41:57] <Tom_itx> maybe a tossup
[20:42:13] <andypugh> You don't necessarily need the 7i47, you can connect the encoders (if they are 5V TTL) directly to the bard header.
[20:42:52] <nspiel> so under the mesa 7i25 it has encoder support
[20:42:58] <andypugh> Tom_itx: The 7i25 drives don't connect to the 5i25
[20:43:05] <Tom_itx> mmm
[20:43:17] <andypugh> Ah, OK, does it?
[20:44:04] <andypugh> OK, sorry about that, you don't need the 7i47 then
[20:44:08] <Tom_itx> i'm not familiar with the 5i25 yet
[20:44:29] <andypugh> nspiel: Do you have a PC with a parellel port?
[20:44:38] <nspiel> well.... not any more
[20:45:23] <nspiel> is there any way to get a modern computer with a parallel port
[20:45:50] <andypugh> That's a shame. If you only need 2 x 50 pin headers for the 7i25 (as now appears to be the case) then the 7i43 board would work. That is a USB/parallel connected device (USB not supported by LinuxCNC)
[20:46:08] <andypugh> 7i43 is $80 or so
[20:46:55] <nspiel> where do u see that? i cant find the prices?
[20:47:31] <andypugh> Yes, lots of current computers have a parallel port. Sometimes it is a header on the board (which exactly matches the 7i43 connector, as it happens)
[20:47:32] <nspiel> and is there any way to get a modern computer that can run linux cnc as well as has a paralell port for the board
[20:48:45] <andypugh> nspiel: http://www.amazon.com/Intel-Dual-Core-Mini-ITX-Motherboard-BOXD525MW/dp/B0041RSC94/ref=sr_1_1?ie=UTF8&qid=1375061631&sr=8-1&keywords=D525MW
[20:50:12] <andypugh> (and I just know the prices of some of the Mesa kit, but there is a link on the left of the web page to the price list)
[20:50:50] <nspiel> oh yeah i saw
[20:50:54] <nspiel> its not on the price list
[20:51:19] <nspiel> so what i need to complete the setup is a 7i43 board and a computer with parallel support
[20:51:19] <nspiel> ?
[20:51:54] <andypugh> Yes, that will work.
[20:52:27] <nspiel> how much do the associated computers usually cost
[20:52:34] <andypugh> You might run out of IO with that setup, just as a warning, but that is the minimum-cost entry point
[20:54:52] <nspiel> so how can i spec one so it wont run out of i/o
[20:55:19] <andypugh> It might not be a problem. What is the robot doing?
[20:55:37] <nspiel> its going to be doing various cnc
[20:56:31] <nspiel> milling, laser cutting, and maybe welding
[20:56:40] <Tom_itx> yeah i'm using the 7i43 7i47 combination
[20:56:40] <kwallace2> If the motherboard has PCI or PCIe slots, you can add parallel port cards to get more I/O. I use this or very similar: http://www.geeks.com/details.asp?invtid=OPTI-755DT-C2D233-3R&cat=SYS
[20:57:53] <andypugh> The 7i25 manual seems to suggest that there are 8 unused bits on the 50 pin connector (in case you were wondering, 25 of the 50 pins are GND and one is a +5V)
[20:58:04] <Tom_itx> andypugh, can you run a 7i43 and a 5i25 in the same system?
[20:58:21] <Tom_itx> or is that gonna create a conflict
[20:58:50] <andypugh> Yes. There are no limits on the combinations as long as you can find somewhere to plug them in.
[20:59:08] <Tom_itx> so he could add that if he ran out of IO
[20:59:26] <Tom_itx> using the 7i43
[20:59:33] <andypugh> Yes
[20:59:59] <Tom_itx> i was gonna play with sserial on mine but haven't gotten around to it yet
[21:00:12] <Tom_itx> for pendant io mostly
[21:01:01] <nspiel> hmm this is interesting
[21:01:12] <nspiel> i like the 100 dollar computer option. will that work>
[21:01:29] <andypugh> Which computer is that?
[21:01:44] <nspiel> http://www.geeks.com/details.asp?invtid=OPTI-755DT-C2D233-3R&cat=SYS
[21:02:12] <andypugh> Unfortunately not all computers work with LinuxCNC. But typically the older and cheaper they are, the better they work :-)
[21:03:01] <kwallace2> I got decent latency with mine, but I'm also using a Mesa card so it doesn't really matter.
[21:03:04] <Tom_itx> and not necessarily the fastest ones
[21:03:50] <andypugh> A quick Google suggests that that Dell can do EPP.
[21:03:59] <andypugh> (important for the 7i43)
[21:04:46] <nspiel> @kwallace is that the one you have?
[21:04:47] <nspiel> that link
[21:05:35] <andypugh> http://www.linuxcnc.org/index.php/italian/forum/18-computer/21442-is-latency-an-issue-when-using-a-mesa-card?limit=6&start=6#21462 Suggests that the latency isn't great on that system, but if you are using a 7i43 then that isn't all that important. I reckon that Dell will work fine.
[21:06:12] <nspiel> andy, what is the best way to learn how all of these components work. im a meche and im new to all thi
[21:06:13] <nspiel> this
[21:06:41] <Tom_itx> hang around here and take notes
[21:07:27] <nspiel> great. I am
[21:07:38] <andypugh> nspiel: I am a meche too. You have started exactly as I did. In 3 years you may well know more than me. Most of what I know I learned from answering other peoples questions (those who knew a bit less than me)
[21:07:55] <nspiel> that is great
[21:08:52] <andypugh> (I only learned to code in C because I knew that the Mesa cards had a feature I wanted that LinuxCNC didn't have a driver for).
[21:09:28] <andypugh> So, it looks like you can be up and running for $180. Which sounds like a result to me.
[21:10:09] <nspiel> yeah that sounds so awesome!
[21:10:20] <nspiel> is there any diagram for wiring and setup or guide?
[21:12:18] <nspiel> the only thing that i worry about it how much current the motors on my scara arm will draw
[21:12:23] <nspiel> is
[21:13:09] <kwallace2> Oops, the link I posted is for a Dell, I meant to link an HP and mine appears to be an HP DC7900.
[21:14:50] <nspiel> but the dell will still work?
[21:15:38] <nspiel> also i cant find the 7125 in linux cnc
[21:20:39] <andypugh> The link I posted was for the Dell
[21:20:49] <andypugh> It looks like it is known to work OK
[21:20:56] <nspiel> cool
[21:21:04] <andypugh> Not brilliant, but well enough.
[21:21:12] <andypugh> (and at the price...)
[21:21:20] <nspiel> yeah its a great price
[21:21:52] <nspiel> any idea about linux cnc not including the mesa 7i25
[21:21:56] <andypugh> nspiel: The 7i25 looks to be quite old, but it will be supported.
[21:22:47] <andypugh> LinuxCNC won't even know that it is a 7i25 on the far side of the 7i43. All LinuxCNC sees is a bunch of PWM generators and encoder counters.
[21:22:47] <nspiel> i didnt see it on the menu for linux cnc on version 2.5
[21:23:51] <Connor> what is the 7i25 ?
[21:24:20] <andypugh> That's your motor driver isn't it?
[21:24:29] <nspiel> yep
[21:24:51] <nspiel> how can i tell if my motors will draw too much current
[21:24:52] <nspiel> they are really big
[21:24:58] <nspiel> i dont want to blow my 7125 up
[21:25:26] <andypugh> The 7i25 will current-limit. I very much doubt that it can be blown up by the motor.
[21:25:44] <andypugh> And, if they came as a set, they are probably matched.
[21:25:59] <nspiel> oh awesome
[21:26:18] <nspiel> so ihave to buy the 7143 directly from mesa?
[21:27:01] <Tom_itx> andypugh how did you learn how to code the drivers?
[21:27:29] <Tom_itx> nspiel probably so
[21:27:34] <andypugh> nspiel: Yes.
[21:28:08] <andypugh> And, quaint as that seems, it probably involves the use if a telephone.
[21:28:23] <nspiel> awesome sounds good
[21:28:32] <nspiel> hopefully they dont have to make them and have them in stock?
[21:28:34] <andypugh> Tom_itx: I just looked at other drivers and altered stuff.
[21:28:38] <Tom_itx> you'll need a 50 pin ribbon
[21:29:01] <Tom_itx> old scsi cable
[21:29:28] <nspiel> so my setup if i have it right will go from parallel port computer to parallel cable and then to 7i43 then two cords out to 7i25 boards then to my motors and encoders?
[21:29:49] <andypugh> Yes
[21:29:56] <nspiel> awesome!
[21:30:31] <nspiel> what are the cables that go from 7i43 to the 7i25 called?
[21:30:38] <nspiel> they are the multicolor ribbon ones
[21:30:43] <andypugh> It might be worth getting the 3 cables from Mesa too, just to be sure.
[21:30:50] <Tom_itx> yeah
[21:30:51] <nspiel> ah ok
[21:31:29] <andypugh> Many parallel cables out there are not fully wired, or not properly shielded.
[21:31:44] <nspiel> ah ok cool
[21:31:47] <nspiel> ill be back soon
[21:32:03] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/cnc/psu/control6.jpg
[21:32:14] <Tom_itx> there's my 7i43 7i47 cards
[21:32:26] <Tom_itx> (still under construction)
[21:37:56] <CaptHindsight> is it worth automating the gear selectors on a lathe or just put sensors on them and let HAL figure it out?
[21:39:35] <CaptHindsight> 18 spindle speeds, 50-1500 rpm
[21:41:28] <CaptHindsight> or just convert to servo spindle?
[21:43:11] <andypugh> I can't decide
[21:44:07] <andypugh> I reckon that HAL can work out what gear you are in from VFD frequency and spindle encoder. No need for actual gear position sensing.
[21:44:44] <CaptHindsight> yeah spindle encoder will do it
[21:45:09] <CaptHindsight> not sure what to do with this Enco 12 x 36
[21:45:57] <CaptHindsight> or sell to somebody else for a project
[21:47:06] <jdh> I'll give you a 7x10 and $50 for it.
[21:48:47] <CaptHindsight> http://tinyurl.com/mqewjvo they leave the levers on
[21:53:42] <andypugh> Do you think my conversion is worth $7000?
[21:55:17] <CaptHindsight> http://www.youtube.com/watch?v=95B8PDlnajk this one?
[21:55:18] <Tecan> (95B8PDlnajk) "CNC" by "andy pugh" is "People" - Length: 0:01:23
[21:55:25] <andypugh> (Ah, reading the spec, that actually has something that counts as a headstock)
[21:56:12] <andypugh> Yeah, that's the one. Though it has developed a bit since then.
[21:57:00] <CaptHindsight> I'd buy yours over theirs for $7K
[21:57:26] <andypugh> Not much indication that theirs has ballscrews
[21:58:19] <PetefromTn> That is the same basic lathe I have here..
[21:58:23] <CaptHindsight> http://www.microkinetics.com/lathe1236/
[21:58:25] <andypugh> I do expect to be trying to sell that machine fairly soon. I now have a proper mill, and what might be a proper lathe (yet to actually cut metal with it)
[21:59:15] <CaptHindsight> I come across CNC lathes all the time with actual servos and ballscrews but bad controls for <$3K
[22:00:10] <andypugh> CaptHindsight: Did you see my Milling machine show-off video? I finally (today) got all the axes moving under motor power: http://www.youtube.com/watch?v=X0celdfZmkA
[22:00:19] <jdh> 12x has a lot more metal than 9x
[22:01:12] <CaptHindsight> I think MicroKinetics just gets the Chinese lathe from the same location as Enco/Grizzly and ads their controls
[22:01:37] <jdh> the question/answers suggest it has ballscrews
[22:02:14] <CaptHindsight> andypugh: success!
[22:03:56] <CaptHindsight> andypugh: whats the spindle motor?
[22:04:06] <andypugh> 2hp three-phase
[22:04:55] <andypugh> Geared for 45 to 1000 rpm. So more aimed at big cutters than ball-end profiling
[22:07:21] <andypugh> I should be asleep. Goodnight chaps
[22:07:28] <Tom_itx> later andy
[22:07:38] <CaptHindsight> see you tomorrow
[22:10:49] <CaptHindsight> it looks like all I have to do is get rid of the smart stepped USB board and use the EPP adapter to use the cnc4pc board with Linuxcnc
[22:11:35] <CaptHindsight> http://www.cnc4pc.com/Store/osc/product_info.php?cPath=33&products_id=255 or swap this out to something Mesa
[22:15:44] <CaptHindsight> crap the wiki got hacked again http://tabsnoprescription.com/buy-zestril-usa.html
[22:17:04] <CaptHindsight> wiki.linuxcnc.org or is it just my dns?
[22:18:00] <Tom_itx> just you
[22:18:06] <Tom_itx> i get the knowlege base
[22:18:51] <Tom_itx> better scan your pc
[22:19:54] <CaptHindsight> if I type it in it's fine the wiki tab on the http://www.linuxcnc.org/ brings up the online pharmacy
[22:20:45] <Tom_itx> nope
[22:20:49] <Tom_itx> still get the wiki
[22:20:58] <CaptHindsight> now it's fine
[22:22:15] <CaptHindsight> that happened using google DNS
[22:23:20] <Tom_itx> google knows best
[22:37:42] <CaptHindsight> http://singularityhub.com/2013/07/27/canvas-camera-brush-and-algorithms-enable-robot-artists-beautiful-paintings/
[22:41:24] <ktchk> Hi anyone put linuxcnc work under ubuntu precise? stepconf also?
[22:43:46] <CaptHindsight> not sure what the devs have decided, what kernel version does it use?
[22:44:22] <ktchk> 3.6???
[22:45:21] <CaptHindsight> looks like 3.2
[22:45:43] <CaptHindsight> http://packages.ubuntu.com/precise/kernel/
[22:46:18] <CaptHindsight> also some 3.5
[22:47:30] <ktchk> I tried xenomai rtos under ubuntu 12.04 comply ok but no stepconf
[22:49:07] <CaptHindsight> RTAI is working on up to 3.4 or 3.5
[22:49:55] <ktchk> anyone running full linuxcnc under RTAI?
[22:50:53] <CaptHindsight> yes, with 3.5 but not with Ubuntu
[22:51:13] <ktchk> gentoo?
[22:51:17] <nspiel> yay i found a computer!
[22:51:18] <CaptHindsight> yes
[22:51:25] <nspiel> just need a parallel card now
[22:54:01] <CaptHindsight> ktchk: it's only with the RTAI fork https://github.com/ShabbyX/RTAI
[22:54:59] <Tom_itx> ktchk doesn't sound like andypugh is very impressed with it so far
[22:55:12] <CaptHindsight> there's a howto for building the kernels somewhere, just don't have the link at the moment
[22:55:49] <ktchk> CaptHindsight: kernal is the first move linuxcnc 2.5 is the second
[22:56:27] <CaptHindsight> ktchk: IIRC it works with linuxcnc 2.5
[22:58:02] <ktchk> anderswallin xenomai was tested yesterday
[22:58:47] <ktchk> CaptHindsight: what is IIRC?
[22:58:58] <CaptHindsight> ktchk: ask memleak in another day or so when he gets back abou the RTAI howto
[22:58:59] <Tom_itx> if i recall
[23:02:20] <CaptHindsight> hes has 32 bit working now with the extensions for >4GB ram
[23:02:31] <CaptHindsight> 64 bit should take a few more weeks
[23:04:07] <ktchk> how is the latency?
[23:05:57] <CaptHindsight> ~6uS on Athlon-II's + 785 chipsets
[23:06:08] <ktchk> nice
[23:06:37] <ktchk> AMD is ok what will be intel
[23:06:52] <CaptHindsight> with a fresh install of linuxcnc 2.5 from the livecd it's ~14uS on the same hardware
[23:07:41] <CaptHindsight> you'll have to find out, we only work with AMD since we also use coreboot instead of BIOS
[23:08:12] <ktchk> ever try remastersys to produce a live CD of your working system?
[23:08:34] <CaptHindsight> not for a few years
[23:10:21] <CaptHindsight> testing hardware with the LiveCD is about the only time Ubuntu gets used
[23:10:49] <ktchk> test stepper motor also
[23:12:38] <CaptHindsight> https://github.com/ShabbyX/RTAI/tree/master/base/arch/x86/configs
[23:13:39] <CaptHindsight> so currently it's up to Linux/x86 3.4.53 Kernel Configuration
[23:14:28] <CaptHindsight> this gave us the new AMD hardware drivers, GPU accel, etc
[23:14:46] <ktchk> I see RTAI is ok
[23:16:13] <CaptHindsight> ktchk: you might want to lurk in #linuxcnc-devel
[23:17:01] <ktchk> I saw a lot of mail there but not yet finalize
[23:17:31] <CaptHindsight> not sure when the devs will have a new LiveCD
[23:19:12] <CaptHindsight> lots of work to merge all the new real time work plus the new ARM stuff
[23:20:15] <ktchk> ARM? can drive linuxcnc what port parellel?
[23:21:51] <CaptHindsight> http://www.youtube.com/watch?v=n2IoHOZipLU
[23:21:52] <Tecan> (n2IoHOZipLU) "BeagleBone + BeBoPr + LinuxCNC + MendelMax Printing" by "Charles Steinkuehler" is "Tech" - Length: 0:03:12
[23:22:23] <ktchk> linuxcnc reprap
[23:24:23] <CaptHindsight> the omap on the beaglebone black has two microcontrollers with GPIO
[23:25:32] <ktchk> GPIO instead of parellel
[23:26:20] <CaptHindsight> sitara sorry
[23:26:28] <CaptHindsight> http://www.ti.com/product/am3359
[23:27:14] <CaptHindsight> Programmable Real-Time Unit and Industrial Communication Subsystem (PRU-ICSS)
[23:30:42] <CaptHindsight> https://github.com/CircuitCo/BeagleBone-Black/blob/master/BBB_SCH.pdf?raw=true
[23:31:15] <CaptHindsight> and you can see which signals the bebopr uses http://circuitco.com/support/index.php?title=BeBoPr_Cape
[23:33:28] <ktchk> there is a prom on it
[23:40:55] <CaptHindsight> https://github.com/modmaker/BeBoPr-Bridge/blob/master/BBB-P8-P9-signals.pdf
[23:41:25] <ktchk> I am watching the video Thanks
[23:57:56] <ktchk> a pumpup ardurino nice.