#linuxcnc | Logs for 2012-11-03

[02:14:13] <mazafaka> http://www.youtube.com/watch?v=UnKjIdlGXgQ End mill bit d16 mm, HSS. 160-200 RPMs, not more, for coolant to be where it must be, feedrate about 80 mm/min (feedrate override 90-150%), depth of the passes is 2 mm, because it's easy to sharpen the tip of the end mill bit.
[03:16:19] <DJ9DJ> moin
[03:26:17] <toastydeath> why does everyone machine at like half the speed of beard growth
[03:26:29] <toastydeath> every time there's a video someone posts, it's crawling along
[03:27:15] <Theta9> personally, it is hard to trust fast/light cuts will cut faster than slow heavy cuts
[03:27:35] <Theta9> i'm sure there is a level where fast/light will remove more material
[03:27:44] <Theta9> getting there is hard though
[03:27:55] <toastydeath> fast/light is beyond the ability of many hobby controls
[03:28:12] <toastydeath> and is still faster than most of the videos I see posted
[03:28:25] <toastydeath> slow and heavy isn't the issue, i'd understand that
[03:28:35] <toastydeath> what I don't get is these itty bitty cuts crawling along at 2 ipm
[03:29:10] <Theta9> well, even parallel port drivers can do better than that
[03:29:22] <Theta9> so, i doubt it is a driver issue
[03:29:48] <toastydeath> no, it's a control issue - the actual control itself
[03:30:31] <mrsun> why not medium/medium then? :P
[03:30:34] <toastydeath> get a machine moving 60-80 inches a minute and a lot of inexpensive or free controls can't handle changing directions
[03:33:08] <toastydeath> and i used to run a machine from the late 60s that could easily cut faster than that
[05:21:15] <Loetmichel> mornin'
[06:20:41] <jthornton> andypugh, I corrected the drill bit selection for ISO taps
[07:50:43] <jthornton> so now I wonder if I even need sqlite in my machinist calculator
[08:08:52] <IchGuckLive> hi all is it posible to check a servo UVW without a Drive
[08:10:27] <awallin> you mean the winding wires? you will see some back-emf if you rotate the rotor
[08:10:50] <IchGuckLive> on the meter
[08:10:52] <IchGuckLive> V
[08:11:08] <awallin> oscilloscope would be better
[08:11:09] <IchGuckLive> = or ~
[08:11:25] <awallin> it will look like a sine-wave
[08:11:28] <IchGuckLive> oszi is right by myde side
[08:12:02] <IchGuckLive> beetwheen the phases Red With Blue
[08:12:42] <awallin> yeah in a star-connection I guess there is no way to put one end of the measurement at the center of the star...
[08:13:05] <IchGuckLive> the servo reads 200V 100W what shoudt i go for voltige on the oszi
[08:13:46] <awallin> just try something... rotate it slowly with a battery-drill or something. 10V sine wave I would guess maybe
[08:16:55] <IchGuckLive> awallin: wave is present at all phase connections
[08:18:03] <IchGuckLive> so i guess i need a new encoder 2000p/rev 8mm hohl
[08:20:32] <IchGuckLive> how is this called in english wirh the hole
[08:21:09] <IchGuckLive> Line Driver Encoder 2000 xxxx 8mm hole ?
[08:52:37] <jdh> any .us electronic types have a spare BN20 or two they could send me?
[08:54:28] <jdh> BSN20 N-channel enhancement mode vertical D-MOS transistor
[09:11:30] <Tom_itx> http://www.mouser.com/Search/Refine.aspx?Keyword=BSN20
[09:38:40] <JT-Shop> me now knows what a "tommy bar" is
[10:11:44] <jdh> Tom_itx: $0.08 orders are awkward. I was hoping someone had some laying around.
[10:11:56] <Tom_itx> i figured as much
[10:13:26] <jdh> finally tried to talk to this ADC board last night, and it's missing most of the BSN20. Looks like there is the remnants of 1 leg attached.
[10:19:07] <jdh> vendor is sending me a new board, and a BSN20 to attempt a fix.
[10:29:13] <sliptonic> Can I configure F11/F12 keyboard shortcuts to increase/decrease spindle speed in smaller increments? Right now, F12 goes full on and F11 full off.
[10:31:30] <jdh> mine go in 100 rpm increments.
[10:35:22] <jdh> are your scale values set correctly? Does s1000 really do 1000?
[10:36:50] <sliptonic> I'm not sure. I'll start looking there. I'd just assumed that axis had some increment factor I was missing.
[10:37:01] <jdh> afaik, it is 100
[10:37:14] <jdh> on sets s1, + increments by 100
[10:38:03] <jdh> halui.spindle.increase does +100
[10:57:39] <pcw_home> 7I77 default analog out scaling is in volts so 10 or > will be full speed
[10:58:35] <pcw_home> the analog out scaling needs to be set to the spindle RPM at 10V
[10:59:22] <r00t4rd3d> daylight savings time is stupid.
[10:59:57] <pcw_home> we need it for harvesting
[11:00:01] <r00t4rd3d> bs
[11:00:05] <awallin> ugh, how long should it take to write an 800Mb iso-file to usb-stick? the "dd" command has no progress indicator at all...
[11:00:37] <r00t4rd3d> http://en.wikipedia.org/wiki/Daylight_saving_time
[11:00:45] <r00t4rd3d> a bug hunter and golfer.
[11:01:00] <r00t4rd3d> this is why we have daylight savings time
[11:01:48] <Jymmm> awallin: 1) about 30m, 2) It does, you just have to enable it =)
[11:02:10] <jdh> we should always have DST
[11:02:13] <awallin> Jymmm: wow that long, ok thanks... I'll wait
[11:03:01] <r00t4rd3d> jdh why? so when you go bug collecting after work you can still see?
[11:03:04] <r00t4rd3d> thats why we have it now.
[11:05:08] <jdh> I would rather have daylight later than earlier.
[11:05:30] <jdh> for mon-fri, it could stay dark until noon and I'd never notice.
[11:05:41] <jdh> and after all, I am the most important consideration.
[11:06:00] <pcw_home> It is rather silly much better to just change working ours to suit
[11:06:31] <jdh> yeah, but getting others to match mine isn't going tohappen.
[11:07:48] <r00t4rd3d> reading the history of dst is comical.
[11:07:49] <pcw_home> I think if DST were abolished, businesses, schools etc that cared would just adjust hours as appropriate
[11:08:11] <r00t4rd3d> "An avid golfer, he also disliked cutting short his round at dusk."
[11:08:20] <jdh> school hours changing without corresponding business hours changing woudl be chaotic
[11:09:04] <pcw_home> looks like Kazakhstan abolished DST in 2005
[11:09:25] <jdh> K could be a role model for the world!
[11:09:27] <r00t4rd3d> Hawaii, Arizona dont do it.
[11:09:45] <L84Supper> school days start too early IMHO
[11:09:57] <jdh> we ship our contaminated trash/dirt/etc to kazakhstan.
[11:10:10] <r00t4rd3d> and millions of dollars.
[11:10:14] <L84Supper> what are kids doing waiting for buses or walking to school at 7:00 am?
[11:10:36] <jdh> my bus came at 6:20 in high school
[11:11:01] <r00t4rd3d> i got kicked off and had to walk.
[11:11:06] <L84Supper> jdg: marine HS?
[11:11:16] <jdh> Nashville
[11:11:27] <L84Supper> same thing :)
[11:12:11] <sliptonic> pcw_home: That makes sense (analog scaling) Since my VFD only takes positive reference voltage (0-10) do I set the minimum at 0?
[11:12:36] <L84Supper> I'm glad that's all behind me now with my kids
[11:15:25] <r00t4rd3d> http://usa.ttesports.com/products/product.aspx?p=39&g=ftr
[11:16:14] <pcw_home> sliptonic Im not sure. Are negative values used with reverse spindle direction? I would check on connected to your spindle
[11:16:22] <r00t4rd3d> http://www.ebay.com/itm/Thermaltake-eSports-Level-10-M-Black-Gaming-Mouse-MO-LTM009DT-/190745143969?pt=Mice&hash=item2c694beaa1
[11:16:27] <pcw_home> unconnected
[11:16:28] <r00t4rd3d> hmm only 90 now
[11:16:46] <L84Supper> r00t4rd3d, are they any good?
[11:17:20] <r00t4rd3d> never used one but they are designed by Thermaltake and BMW so I would imagine.
[11:18:53] <r00t4rd3d> soon i will buy one
[11:19:01] <sliptonic> pcw_home: It takes 0-10v corresponding to VFD frequency. Then separate pins for forward and reverse.
[11:20:55] <skunkworks> I used abs in hal to make the spindle commanded value always positive... then ran that into the mesa dac
[11:22:40] <skunkworks> It looks like I then used the ABS sign pin for direction.. but I don't exactly remember how that was hooked in..
[11:22:58] <skunkworks> but there are quite a few ways you could do it.
[11:26:03] <skunkworks> http://www.youtube.com/watch?v=22dWg3GbywE&feature=plcp
[11:26:30] <sliptonic> skunkworks: Could I get your hal file? I'm still a bit of a noob when it comes to hal.
[11:27:11] <skunkworks> I don't have the latest here... and I am using the 5i20
[11:27:16] <skunkworks> holdon
[11:27:45] <skunkworks> (and it is a mess - this is a very large HMC with tool, and pallet changer.
[11:35:18] <skunkworks> sliptonic: this is pretty old http://pastebin.com/mhJ23jV0
[11:35:36] <skunkworks> does seem to be pretty complete
[11:35:54] <sliptonic> Thanks. It's just to learn from.
[11:37:15] <skunkworks> The gearshift16 is a hal componant I wrote to do the spindle gearbox shifting, lock and such
[11:37:40] <skunkworks> I am sure I could have done it in ladder logic - but I could wrap my head around it better programically
[12:03:11] <skunkworks> sliptonic: what are you converting?
[13:01:04] <ktchk> Hi any recomandation for auto touch high adjustment for plasma table?
[13:02:46] <sliptonic> skunkworks: I'm converting a bridgeport clone (supermax ycm-30) Still struggling to get the mesa 7i77 analog5 to output 0-10v for the vfd though.
[13:03:49] <skunkworks> is it doing anything at all?
[13:04:41] <sliptonic> I'm configuring through pncconf. If I set min-0 max=10, and max scaling to 6000, then the pin will be at about 0v with the spindle off. It jumps to 1.7 when I start the spindle and stays there regardless of set speed.
[13:04:42] <skunkworks> you can see I scaled the spindle pwm to -4000
[13:04:58] <sliptonic> If I set max scaling to 1, it jumps to 10v.
[13:05:33] <skunkworks> huh
[13:05:55] <skunkworks> I have never used the pncconfg
[13:06:35] <skunkworks> so - when you do a m3s6000 with the above scaling - you get 1.7v?
[13:07:31] <sliptonic> So far, I've just been testing with the keyboard shortcuts, but yes.
[13:07:34] <tetbert> emc2 is running our y-axis, but not z or x
[13:07:44] <skunkworks> and spindle overrride is set to 100%?
[13:07:52] <sliptonic> Correct.
[13:08:02] <skunkworks> How do you know what S is at when running manually?
[13:08:26] <pcw_home> I dont think you can set the scales unsymmetrically
[13:08:26] <sliptonic> I added a custom panel to show the spindle speed.
[13:08:34] <skunkworks> ok
[13:08:47] <sliptonic> pcw_home: I don't understand.
[13:09:18] <pcw_home> what HAL parameter are you changing?
[13:09:32] <sliptonic> I'm configuring through pncconf.
[13:09:55] <sliptonic> On the spindle page, setting min,max, and max scaling.
[13:10:53] <pcw_home> I wouls do this directly in the HAL file so we know exactly whats going on
[13:12:14] <sliptonic> o.k. I'll play with that and be back in a bit.
[13:14:08] <ktchk> Hi any recomandation for auto touch high adjustment for plasma table?
[13:21:41] <ktchk> Hi any one working with plasma table?
[13:26:23] <archivist> a few
[13:27:07] <tetbert> figured it out!
[13:27:08] <ktchk> archivist: auto touch height?
[13:27:42] <archivist> ktchk, look on the wiki
[13:27:50] <archivist> and forum
[13:28:21] <ktchk> archivist: any stand alone version?
[13:29:08] <archivist> no idea I have not looked
[13:29:24] <ktchk> archivist: OK thanks
[13:36:04] <jthornton> dang he didn't stay long
[13:40:35] <IchGuckLive> hi all around the world
[14:06:02] <sliptonic> pcw_home: here's my .hal file. http://pastebin.com/8NWLhz39
[14:06:53] <sliptonic> from .ini axis scale is 6000, max 10, min 0.
[14:07:08] <sliptonic> With spindle off, analog5 shows 64.6 mV.
[14:07:49] <sliptonic> m3s3000: analog5 shows 77.1mV
[14:10:22] <sliptonic> If I set output scale to 1, I can make it jump from ~65mV to 10V.
[14:10:33] <sliptonic> But nothing in between
[14:12:30] <pcw_home> you would need minlimit 0 maxlimit 6000 scalemin =-6000 scalemax =6000
[14:14:12] <pcw_home> oops no scalemin just 6000 for scale max
[14:15:45] <pcw_home> setp hm2_5i25.0.7i77.0.1.analogout5-scalemax 6000
[14:15:47] <pcw_home> setp hm2_5i25.0.7i77.0.1.analogout5-maxlim 6000
[14:15:49] <pcw_home> setp hm2_5i25.0.7i77.0.1.analogout5-minlim 0
[14:18:47] <sliptonic> pcw_home: Thank you! That was the one combination I didn't try.
[14:19:24] <pcw_home> maybe pncconf needs a bugfix
[14:20:05] <IchGuckLive> sliptonic: did you improve the VDF to 400kHz
[14:20:27] <IchGuckLive> be carfull with speeds below 2500
[14:20:41] <IchGuckLive> it will head up alot
[14:22:02] <sliptonic> IchGuckLive: I've seen that documented everywhere but I don't understand it. This is a 3 phase induction motor rated for 60Hz.
[14:22:46] <sliptonic> If I set the base freq for 60 and the max and min around that I can overdrive the motor. If I set it to 400 the motor won't start.
[14:22:49] <IchGuckLive> we speking about hyanyang watercooled spindles or
[14:23:12] <sliptonic> Huanyang vfd. Not spindle.
[14:23:35] <pcw_home> Master has the sserial manual with some hints on what the maxlim/minlim/scalemax do
[14:23:36] <IchGuckLive> ah ok then im out do you drive a servo with this vfd
[14:23:37] <pcw_home> (though they are described per card, they are the same for all sserial numeric output types )
[14:24:29] <sliptonic> pcw_home: pncconf is setting the values right. I just assumed max limit was the limit that the pin was putting out. Just me being ignorant.
[14:25:26] <sliptonic> IchGuckLive: Nope. Just the spindle motor. This is a bridgeport clone conversion.
[14:26:31] <IchGuckLive> ok i thougt i got now 5 of this working VFD and at Foam mill im always at 7500
[14:26:39] <sliptonic> pcw_home: "master"? Git repo?
[14:34:10] <pcw_home> Should be, commited Oct 23
[14:39:05] <IchGuckLive> pcw_home: is it also improved to the 7i76 stepconf
[14:45:55] <IchGuckLive> im off by have a nice weekend where ever you are
[16:39:56] <andypugh> pcw_home: Have you thought about making a Smart-serial temperature controller? I am thinking in terms of something with a few K-type thermocouple connectors (possibly doing cold-junction compensation and linearisation in software back in the machine) and an equal number of beefy SSRs for turning heating coils on and off.
[16:40:18] <andypugh> Plug that into your 7i76 and you have a rather good basis for a reprap type thing
[17:02:44] <JesusAlos> Hi people
[17:11:24] <DJ9DJ> gn8
[17:17:30] <JesusAlos> DJ9DJ: What's mean gn8?
[17:17:51] <JesusAlos> is the second time that i lisen say of you
[17:17:57] <andypugh> Goodnight
[17:18:09] <andypugh> It's not a very good abbreiviation
[17:18:59] <JesusAlos> abbreiviation of?
[17:19:21] <JesusAlos> goodnight and 8?
[17:24:09] <Spida> its german. night == nacht == n+acht n+8
[17:25:36] <JesusAlos> :)
[17:25:39] <JesusAlos> thank
[17:42:24] <KimK> andypugh: I second your idea, but would use it both for spindle growth comp (which I understand Sam has already done) and to use one of your "beefy SSRs" for turning a spindle chiller on/off and alarming if it gets too hot. And maybe keeping a few hours of temp history?
[17:43:49] <KimK> The exact circumstances were murky, but we had a spindle failure here recently that may or may not be traceable to spindle chiller failure. The machine in question had no overtemp alarm, nor any temperature history. Not even the operator's senses, since the door was closed and it was running.
[17:44:19] <roh> hm. you got such an expensive piece of hardware and no monitoring on it?
[17:45:04] <roh> just curious... i would have expected that something like that is default on such equipment
[17:45:26] <KimK> That's the way they build them, cheaper, I suppose. But with LinuxCNC we can add whatever we can imagine, and that machine is a LinuxCNC candidate.
[17:45:42] <roh> sure.
[17:48:44] <KimK> It's a 10,000 RPM spindle with only the usual greased bearings (nothing fancy like air bearings, or oil mist, or anything like that), so loss of the chiller above 5 or 6 K or so could lead to some heat. Exactly how much is a little uncertain.
[19:26:39] <pcw_home> We have a 8 channel Thermocouple interface coming out (7I88)
[19:26:41] <pcw_home> If that works out we could make something more tailored to rep-rep type apps
[19:26:52] <pcw_home> rep-rap
[19:29:08] <Tecan> http://www.indiegogo.com/linuxlaser?a=1705409 << is this offensive to anyone ? figured ide ask before someone decides to donate
[19:30:58] <Tecan> duno if i can use the logo like that either
[19:33:51] <L84Supper> IMHO, I don't think you'll reach that goal
[19:34:18] <L84Supper> you can buy a laser off-the-shelf for far less
[19:34:32] <Tecan> hmmm where ?
[19:35:26] <Tecan> besides its hard to setup lasers in emc and the tools just arnt there yet
[19:35:44] <L84Supper> I have the links on my other Linux install.... I'll post them later
[19:35:57] <Tecan> for graster ?
[19:36:48] <L84Supper> for the laser sources from China
[19:37:34] <Tecan> duno about finding the whole machine with 80 watt ps for that
[19:37:55] <Tecan> specially with moving z axis
[19:43:49] <roh> its really a question of whats not described there...
[19:44:31] <L84Supper> http://en.shenhuilaser.com/index.asp
[19:45:38] <roh> from my pov the expensive part is mechanics and quality not getting a tube and some mirrors and lens
[19:46:31] <Tecan> yep there are ways to get that cost down too- point taken though i'll specify more
[19:47:10] <roh> well.. it depends on what stuff you use in the machine you sell.. describe that a bit more.
[19:50:57] <micges_> pcw_home: hi
[19:51:13] <pcw_home> HI
[19:51:17] <micges_> pcw_home: will servo x4 and sserial x1 fit 7i43?
[19:51:42] <pcw_home> yes easily
[19:52:21] <micges_> cool
[19:52:58] <pcw_home> servo (PWM/encoder) are quite small, stepgen and sserial are bigger but that and more will fit in a 200K 7I43
[19:54:01] <micges> 2x sserial will be absoulte max
[19:54:57] <pcw_home> more sserial channels than one are not bad either ( more than 1 just add a UART until you get to 8)
[19:55:05] <pcw_home> 8
[19:55:38] <pcw_home> first one costs a processor, RAM and ROM
[19:55:54] <micges> ah
[19:58:04] <micges> one more thing - what power does output from 7i37 have? 0.25W ?
[19:58:45] <pcw_home> current?
[19:58:50] <pcw_home> 1A
[19:59:09] <micges> per output?
[19:59:16] <pcw_home> Yes
[20:01:56] <micges> thanks
[20:03:52] <pcw_home> 7I64 and 7I66 have more (2.5A I think)
[20:16:16] <micges> 7i66 will fit perfectly for sserial
[20:16:33] <micges> if output will be too weak
[20:51:41] <L84Supper> Tecan, http://www.ebay.com/itm/80w16x24-laser-cutter-engraver-machine-with-higher-quality-cheap-price-free-ship-/130444174189?pt=LH_DefaultDomain_0&hash=item1e5f14236d
[20:51:55] <L84Supper> US $3,999.00 with shipping
[20:53:46] <L84Supper> http://www.kickstarter.com/projects/1427848145/build-your-own-laser-cutter?play=1&ref=search
[20:54:17] <L84Supper> $60,294 pledged of $300,000 goal 14 days to go
[20:55:30] <L84Supper> http://www.kickstarter.com/projects/fsl/affordable-20x12-laser-cutter-engraver-assembled-i?ref=search
[20:55:48] <L84Supper> $259,327 pledged of $100,000 goal
[21:58:25] <Tecan> thanks