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[01:12:58] <jm82792> hey I have a LinuxCNC controlled CNC router and I'm about to buy a second one. I'd like to clean things up and standardize them.. So I was thinking about buying a BeagleBone Black.
[01:13:02] <jm82792> But I need 3d back plotting.
[01:13:05] <jm82792> Is that in yet?
[01:13:25] <cradek> I thought all charles's images used AXIS but I have never used them
[01:14:44] <cradek> are you interested in development and bleeding edge? if you're "just an end user" as you said in the other channel, you might want to stick to a real pc for now.
[01:15:17] <jm82792> I"m a tad budgeted and I'd like to ditch a full PC along with I don't mind fiddling to get stuff working.
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[01:15:32] <jm82792> But I don't want anything unstable though...
[01:15:56] <jm82792> But I'm just an end user feeding a bunch of generic Gcode.
[01:16:29] <jm82792> Please pardon my somewhat incoherent typing...
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[01:17:44] <jm82792> I have been using an older Pentium 4 PC for a few years, and was thinking a small ARM based computer would be the ticket.
[01:17:46] <cradek> last I heard, the beagles had a little trouble running AXIS. They are not fast.
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[01:18:09] <cradek> a pentium 4 is a very easy solution and costs about $0
[01:18:24] <jm82792> Yeah that is a bit of a bummer. I'm guessing it will be a year or two before it goes anywhere.
[01:18:39] <cradek> before what goes where?
[01:19:02] <jm82792> I'm trying to watch power consumption since the atom d525's use about 40 watts, the P4's use about 300, and in the end running two smaller CNCs off 15 amps is difficult.
[01:19:42] <jm82792> Before I can easily use LinuxCNC on an ARM based board withiout any effort or considerations, like I would on an x86 system.
[01:19:45] <cradek> do you run them both at the same time?
[01:20:24] <cradek> I have two (er uh, three) interfaces in my linuxcnc pc and I can plug my variety of hardware into it
[01:20:29] <jm82792> I've yet to buy the second one but I am planning on running both at the same time.
[01:20:30] <cradek> two parports and a mesa card
[01:20:54] <cradek> oh ok, then you do need another pc, I guess
[01:21:05] <jm82792> They are just little desktop setups but I want to dedicate one for one thing and oen for another.
[01:21:29] <cradek> you can run many 300 watt PCs on one 15A circuit
[01:21:47] <RyanS> . I'm thinking of this idea, inspired by those simple jigs to help cut straight lines and radii for plasma torches. Except for mig torch. Set the appropriate torch angle attach it to the joint you are trying to make. Slide the torch along the rails of the jig. Even a three axis CNC gantry
[01:22:01] <cradek> (did you measure 300? I'd be pretty surprised.)
[01:22:34] <jm82792> I currently run an 1000 watt router, 400 watt PSU for steppers, then probably 400 for the PC+ lighting for the workshop.
[01:23:08] <jm82792> I think it was about 200- 300 as it's a 8 or so year old computer. I had a D525 but I fried it somehow :/
[01:23:25] <cradek> yeah if that's on one circuit that sounds really tight
[01:23:45] <jm82792> I have a good 6K saved up but 2K for a smaller setup that's identical to what I have sounds best. Then if one goes out I have the other and I can stock up on parts withiout issues.
[01:23:48] <cradek> you may not be able to run two machines simultaneously without better power. the pc is a very small consideration.
[01:24:15] <jm82792> I know, it's just I'd like to have the great latency numbers, the small form factor, and so forth...
[01:24:42] <jm82792> I run the current CNC at 180 IPM at 1/8 stepping and the latency is holding it back some...
[01:25:01] <jm82792> Not to show off but hawaiiwoodart.com shows some of my work :)
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[01:25:08] <cradek> 1/8 stepping means a lot of steps. perhaps you need a step generator like a 5i25
[01:25:55] <jm82792> I got about 12K (?) latency for the atom board, but get around 22K for the P4 since it locks up at anything lower.
[01:26:16] <cradek> those are both pretty good numbers
[01:26:22] <jm82792> It's just I've done things so half way for so long that I want that ideal no BS solution.
[01:26:31] <RyanS> ooo
http://www.centroidcnc.com/cnc_welder.htm
[01:26:37] <cradek> those are neat. lots and lots of cutting time I bet.
[01:27:06] <jm82792> I get a solid 75 IPM of feedrate for 3d profiling as I get about 60 IPS^2 of acceleration.
[01:27:19] <jm82792> So like one hour for the large island.
[01:27:24] <cradek> the BBB is probably far from no-BS at this stage. you might want to read the forums and list archives.
[01:27:28] <jm82792> Of 3d profiling.
[01:27:46] <cradek> that's nice accel. very helpful.
[01:28:04] <jm82792> I'll do that cradek as I've half done this for so long, and it's been so painful for so long! I mean really I've been though the ringer of learning on this.
[01:28:20] <jm82792> For the past two years. Now I have bussiness but everything I use is ghetto.
[01:28:44] <cradek> making do with what you have is smart business, not ghetto
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[01:29:39] <cradek> I have no need for bleeding edge stuff - it just means more work and more money
[01:29:44] <jm82792> It is, I mean I have money, and for being 21 I'm well off. But I know how fast it goes for CNC stuff. But in the end I envision two machines side by side in an enclosure with passive dust collection.
[01:30:05] <jm82792> I have limit switches I've never used, I just hooked up an SSR to turn the router on and off.
[01:30:27] <cradek> good dust collection is smart, especially for exotic woods. some like cocobolo are dangerous
[01:30:36] <jm82792> Crashing on such a small machine isn't a big deal. The only beef I have is I'm getting .0012" or so backlash.
[01:30:49] <jm82792> I've worked with Ipe which is just terrible.
[01:30:52] <cradek> can you even see .0012" in wood??
[01:31:10] <Tom_itx> depends on the wood i would suppose
[01:31:19] <Tom_itx> rather doubtful
[01:31:20] <jm82792> I highly doubt it lol! It's just you get less tool life and stuff.
[01:31:37] <jm82792> I did a lithophane that had 3 million lines oif code and saw some backlash....
[01:32:07] <jm82792> This is coming from one who knew nothing about anyt of this two years ago.
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[01:32:41] <jm82792> I did try to hold .013" detail in Brazilian cherry by using a .0625" ballnose bit with 10% stepover withiout any luck...
[01:33:39] <jm82792> I burned through a #35 1/4" 4 flute bit from Precise Bits in only a few hours, I have a dial indicator coming since I think it's runout as I have a few hundred hours of harduse on the router.
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[01:34:44] <cradek> for wood I bet you don't want 4 flutes
[01:34:47] <jm82792> In all the time I've been routing things out I've never had a bit last so shortly.
[01:34:53] <cradek> doesn't it get stuck in the flutes?
[01:35:05] <jm82792> Precise bits says it's the way to go..
[01:35:09] <cradek> huh!
[01:35:19] <Tom_itx> i wouldn't think so either
[01:35:55] <jm82792> I get REALLY nice finish with their tapered bits for 3d profiling but past that I don't know much.
[01:37:05] <jm82792> I read two flutes or one flute but that's what they mentioned. I use their collets for the Dewalt 611 I use and the tapered bits for 3d profiling.
[01:38:00] <jm82792> I am trying to rule out bad TIR or backlash for the reason I have had suddenly poor tool life...
[01:38:12] <jm82792> http://img836.imageshack.us/img836/3082/qbqn.jpg
[01:38:18] <jm82792> that's with a 1/8" ballnose bit.
[01:39:04] <Tom_itx> what's the stepover?
[01:39:11] <jm82792> 1/10
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[01:39:26] <jm82792> .003" accuracy and like .002" for G64p
[01:39:48] <jm82792> If I'm lucky and the wood isn't too interlocked I use steel wool then that's it.
[01:40:43] <jm82792> http://imageshack.us/a/img571/97/ydbb.jpg http://imageshack.us/a/img843/8021/8wkj.jpg http://imageshack.us/a/img827/1489/xil9.jpg http://imageshack.us/a/img29/3197/0bbi.jpg http://imageshack.us/a/img94/7706/w3y0.jpg
[01:41:19] <jm82792> If you go to .008" stepover and a tighter G64 tolerence along with the third hardest wood in the world you get that :-)
[01:42:03] <jm82792> using a /125" bit
[01:43:38] <jm82792> Anyways if I've sounded a bit impetuous or so forth I apologize. It's been a long time using IRC and usually I can conduct myself better VIA forum posts.
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[08:54:59] <Deejay> moin
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[13:51:34] <tom_R2E3> general electrical question for someone more educated than me:
[13:52:19] <jthornton> we just ask the question around here
[13:52:19] <tom_R2E3> there are three bot contactors in my milling machine which turn the servo drives on and off. They work but they squeal horribly when energised. Is that normal?
[13:52:57] <jthornton> no, that is not normal
[13:53:06] <tom_R2E3> "bot" should say "big"
[13:53:14] <jthornton> are the coils AC or DC?
[13:53:21] <tom_R2E3> DC
[13:53:59] <jthornton> might check that trash is no in the contactor preventing them from going fully closed
[13:54:12] <tom_R2E3> OK
[13:54:21] <jthornton> and check that the rated current and voltage is at the coil
[13:55:17] <archivist> squeal form a DC coil may be an indication of a power supply problem
[13:55:22] <tom_R2E3> I didnt hear the machine running before I bought it. Originally it had a three phase transformer, then rectifier + caps to supply 100VDC to the drives
[13:55:59] <tom_R2E3> I replaced the 3ph transformer with a single phase one, and a load more capacitance
[13:56:27] <tom_R2E3> reused the original rectifier (well some of it)
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[13:57:02] <tom_R2E3> and it supplys 100VDC. I dont have a scope so I cant see what the voltage ripple is like..
[13:57:35] <archivist> where about are you, as you are on the same ISP as me
[13:57:55] <tom_R2E3> Lincolnshire, UK
[13:58:26] <archivist> bit too far to drag a scope
[13:58:35] <archivist> Staffs
[13:58:56] <tom_R2E3> yeah
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[13:59:04] <tom_R2E3> got several in my ebay watched list
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[13:59:53] <tom_R2E3> I wonder if the AC ripple is making them buzz
[14:00:25] <archivist> if the noise is 100hz (cyles per sec)
[14:04:13] <tom_R2E3> its more like 4kHz
[14:04:31] <tom_R2E3> high pitch squeal
[14:08:40] <archivist> odd unless you are hearing servo switching frequency, are you sure you know the sound location
[14:10:04] <tom_R2E3> hmm, not certain
[14:10:26] <tom_R2E3> there are some transformers down there too I think
[14:10:43] <tom_R2E3> I'll go and have another look/listen
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[14:30:56] <archivist> tom_R2E3, <steve_stallings> With the R2E3 Bridgeport controls, it is normal for the servo amplifiers to make a relatively loud squealin sound when energized.
[14:36:06] <tom_R2E3> ah
[14:36:33] <tom_R2E3> damn, was hoping to get rid of it, such an annoying noise!
[14:37:11] <tom_R2E3> incidently, the contactors are powered from a different transformer, they're actually 120 VAC
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[14:51:51] <sivu> bottom part of the gantry done
[14:58:06] <CaptHindsight> sivu: rack and pinion?
[14:59:09] <sivu> ballscrew + 608 against steel pipe
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[15:01:41] <ries> hey guys, I am trying to use axis-remote over ssh but it seems like that axis-remote isn't designed for this. That made me wonder: What is the typical usecase for axis-remote?
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[15:10:34] <archivist> ssh? why would you need that
[15:15:52] <ries> archivist: I am writing a little g-code generator and I thought it would be nice to have a button 'Load in axis'
[15:16:32] <ries> so I am trying to figure out a way to accomplish this. This needs to work from over a local intranet
[15:17:07] <archivist> many have done it not sure ssh was needed
[15:21:38] <ries> sometimes I wish I knew python so I make enhancements to it.... Like adding a mini REST service to send a file over
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[15:30:15] <cradek> tom_R2E3: I agree with steve_stallings; that machine is squealy and loud like that.
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[15:35:51] <skunkworks> it is probably like 4khz pwm Frequency..
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[15:40:24] <CaptHindsight> http://milwaukee.craigslist.org/tls/4167509523.html outdoor bandsaw
[15:45:46] <Tom_itx> ries, you seen JT-Shop's gcode generator?
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[15:46:00] <ries> Tom_itx: I don't think so?
[15:46:37] <ries> Tom_itx: where can I find it?
[15:46:39] <Tom_itx> http://gnipsel.com/files/g-code-generator/
[15:48:27] <ries> Tom_itx: thanks.. let me see if I can run it
[15:48:58] <pcw_home> Fixed the Ethernet latency issue on my desktop
[15:49:00] <pcw_home> http://imagebin.org/284175
[15:49:01] <pcw_home> (7I76E running under Preemt-RT at 2 KHz)
[15:53:36] <ries> Tom_itx: my code does something similar I guess...
[15:53:53] <Tom_itx> just trying to save you repeating it
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[15:57:43] <ries> Tom_itx: thanks for that.. my approach is a bit different though.. I can have multiple project and each project can consist of multiple operations
[15:59:23] <ries> I also have ag-code intepeter and visualiser so I can see what the generated g-code is looking like
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[16:56:06] <tom_R2E3> Hi. Been having a play with PID on my squealing drives
[16:56:44] <tom_R2E3> Different values of P make interesting squealy noises
[16:58:06] <tom_R2E3> and f-error trace is really noisey, not a nice trace like the images on JT's tutorial
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[17:17:57] <pcw_home> for velocity mode drives, most of the tuning is done with FF1
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[17:35:45] <tom_R2E3> Hi PCW
[17:36:33] <tom_R2E3> is there a more relevant tutorial I could follow?
[17:40:49] <pcw_home> that one is appropriate for velocity mode drives
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[17:41:15] <pcw_home> so should be basically relevant
[17:41:20] <IchGuckLive> hi all
[17:41:55] <pcw_home> Hi IchGuckLive
[17:42:26] <IchGuckLive> pcw_home: what a day 3plasmas are runig 150m of cable 4x1,5 300m of 2x0.5 and coils of small 0-.14 colored
[17:42:57] <IchGuckLive> all 7i76 on full motion
[17:43:21] <IchGuckLive> drom 9to5 4people
[17:43:26] <IchGuckLive> from
[17:43:53] <pcw_home> One thing I would change in the tutorial is the scaling (so PID terms are normalized)
[17:44:26] <pcw_home> Thats lot of wire, how big are the tables?
[17:44:40] <IchGuckLive> 3x2m
[17:45:06] <pcw_home> Pretty good size
[17:45:23] <IchGuckLive> im runing at 6m/min on 600mms²
[17:45:34] <IchGuckLive> thats good
[17:45:43] <IchGuckLive> 100steps per mm
[17:46:42] <pcw_home> dual drive gantry?
[17:47:27] <IchGuckLive> yes
[17:49:00] <pcw_home> how are you doing homing? (gantry homing seems a weak spot in linuxCNC now)
[17:49:19] <IchGuckLive> only one switch does not matter
[17:49:52] <IchGuckLive> ther is 5mm of space for the gantry to twist
[17:50:42] <pcw_home> Plasma is not terribly precise anyway I guess
[17:51:01] <IchGuckLive> agree 1mm is nothing on most shapes
[17:51:32] <pcw_home> Leadshine drives?
[17:51:47] <IchGuckLive> i got a poer test for 1hr and i got near 2mm different at 4500mm
[17:51:54] <IchGuckLive> yes 880A
[17:53:02] <pcw_home> The bigger ones
[17:53:19] <IchGuckLive> the 542 are not taken 80V
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[17:53:36] <IchGuckLive> for this long liines you need more power
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[18:08:48] <IchGuckLive> pcw_home: what size of screwdriver is requiered for the 7i76 3.5 terinals its not a EU size
[18:11:58] <Tom_itx> get a jewelers screwdriver set
[18:12:03] <Tom_itx> or one for eyeglasses
[18:12:16] <Tom_itx> RS or Radioshack should have them small enough
[18:12:34] <IchGuckLive> im searching on reichelt.de
[18:12:43] <Tom_itx> or make your own :)
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[18:13:26] <Tom_itx> the one i use says it's 3/32"
[18:13:45] <Tom_itx> #4
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[18:16:06] <Tom_itx> your site doesn't like english
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[18:17:02] <IchGuckLive> ;-)
[18:17:26] <IchGuckLive> Tom_itx: in the top blue bar you can go EN
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[18:18:53] <Tom_L> http://www.reichelt.de/Fine-Screwdrivers/TS-6N/3/index.html?&ACTION=3&LA=446&ARTICLE=21832&GROUPID=563&artnr=TS+6N&SEARCH=%234+screwdriver
[18:19:34] <Tom_itx> 3rd one from the right should do the trick
[18:19:47] <IchGuckLive> agree
[18:20:31] <Tom_itx> but then you'll have a couple extra to tighten your spectacles
[18:21:43] <Tom_itx> i also have a similar phillips set
[18:22:11] <Tom_itx> glued the case back to back
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[18:32:39] <tjtr33> are these different or same ? SSI ( simple sensor interface ) SSI (Serial Synchronous Interface) ?
[18:33:09] <tjtr33> i asked wikipedia for SSI :(
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[18:38:16] <pcw_home> different
[18:38:36] <tjtr33> thx
[18:40:37] <pcw_home> Encoder SSI is very simple: host sends out clock, encoder returns data
[18:40:39] <pcw_home> (no clocks for some timeout period resets encoder shift register logic)
[18:41:12] <pcw_home> so first clock from host latches current count
[18:41:43] <tjtr33> cool, i guess
http://en.wikipedia.org/wiki/Synchronous_Serial_Interface is whats implemented in Mesa libs , so is suited to renishaws magnetic rotary encoder AM4096
[18:44:54] <pcw_home> Should be (I wonder if thats a IC Haus part)
[18:45:54] <tjtr33> web sez owned by renishaw produced by RLS
[18:46:15] <tjtr33> http://www.rls.si/media/pdf/en/95a93b667afa49ae98ddb16157d82bee.pdf
[18:47:04] <pcw_home> I meant AustriaMicrosystems not IC Haus
[18:47:17] <Cylly> re @ home
[18:47:34] <pcw_home> note the AM part #
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[18:50:55] <tjtr33> yep, never can tell who foundires these parts
[18:51:00] <tjtr33> foundries
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[18:58:47] <IchGuckLive> BYE have a nice wekend its the last in 2013
[18:58:50] <IchGuckLive> ;-)
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[20:55:30] <asah> hi all. how do I connect a pin to two signals? I have an input I want to visualize in a panel but also connect to another componant (I am working on my gear shifter)
[20:56:29] <asah> I have a pyvcp panel going which shows state of some leds. I want to take the input from the mesa board, connect it to the input of my comp, and also hook it into the led visualizer in my panel.
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[21:00:06] <asah> in fact, why can't signals be plugged into pins?
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[21:04:49] <asah> I see that many comps make a "state reflecting" output pin which enables the visualization of a particular incoming pin. Am I missing something or is this an architectural limitation I keep bumping against?
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[22:13:28] <asah> skunkworks... got my python gearshifting comp to work.
[22:13:37] <asah> able to shift the back gear now!
[22:14:04] <asah> now to replicate for all three gears and package it up a bit for ease of use.
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[22:35:00] <Deejay> gn8
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