#linuxcnc | Logs for 2013-08-01

[00:00:22] <jp_> 8i20 probably
[00:00:58] <CaptHindsight> looking back at the site
[00:01:31] <CaptHindsight> serial controlled
[00:01:44] <jp_> yup
[00:01:48] <nspiel> i think im gonna get a 7i43
[00:02:27] <jp_> i have a 5i23 available let it go cheap
[00:02:54] <jp_> if you have pci
[00:03:56] <nspiel> yeah i have pci
[00:04:12] <nspiel> will 5i23 interface with 7i25 drivers
[00:04:22] <jp_> i have a ton of spare mesa drivers
[00:04:31] <jp_> 7i29 as well
[00:04:45] <nspiel> i tihnk i need a 7i29
[00:04:51] <nspiel> whats it voltage and current limited
[00:04:53] <Valen> I'm after a 5i23
[00:05:21] <jp_> Valen where r u located?
[00:05:26] <Valen> australia :-<
[00:05:26] <nspiel> how much for the 5i23
[00:05:31] <nspiel> im in USA
[00:05:39] <jp_> 150?
[00:06:08] <nspiel> what about the 7i29
[00:06:21] <Valen> I wish they did the 7i29 for 240V mains
[00:07:30] <jp_> 200 for the 7i29
[00:07:41] <jp_> never used
[00:08:04] <nspiel> u only have one though
[00:08:16] <jp_> correct
[00:08:25] <nspiel> ill think about it man
[00:08:46] <jp_> i have a bunch of other cards as well
[00:09:03] <jp_> that co along with the 5i23
[00:09:49] <jp_> using the 5i25's more now
[00:09:58] <nspiel> i need to drive big motors on a scara arm
[00:10:13] <jp_> DC or AC?
[00:10:25] <Valen> what other cards do you have?
[00:10:28] <nspiel> dc
[00:10:37] <Valen> I'm after some generic I/O and servo stuff
[00:10:42] <jp_> 7i37's
[00:10:56] <jp_> 7i42ta's
[00:11:21] <nspiel> looking for high current and voltage
[00:11:25] <jp_> and the serial brakeout board
[00:12:04] <jp_> Nspiel: yes but brushed dc motord or ac motors
[00:12:27] <nspiel> dc
[00:12:31] <nspiel> brushed
[00:13:13] <jp_> then 7i29's or gekos or something else
[00:13:35] <nspiel> i may make my own
[00:13:50] <nspiel> how does the cost vary from makign ur own to sourcing commercial options
[00:13:50] <jp_> Valen i think i have a servo card as well
[00:14:52] <jp_> Source commercial. You never end up having time to do it right yourself
[00:15:08] <jp_> at least i don't
[00:15:38] <CaptHindsight> MOSCHIP MCS9805CV http://www.asix.com.tw/products.php?op=pItemdetail&PItemID=130;74;111&PLine=74
[00:16:30] <Valen> which one jp_?
[00:16:45] <jp_> 6 axis i think
[00:17:01] <jp_> i would have to check
[00:17:43] <Valen> nah, I'm after the quad I think
[00:18:00] <Valen> I am just wanting to interface with a spindle controller really
[00:18:26] <CaptHindsight> MCS9901 http://www.asix.com.tw/products.php?op=pItemdetail&PItemID=120;74;110&PLine=74
[00:18:33] <jp_> i have the quad too but havent switched over to the 7i77 collecting dust as well
[00:19:51] <Valen> hmm I need to plan my system some more
[00:19:58] <nspiel> so if i have my dc brushed motors set up with encoders and two 7i25 chips and one 7i43 where does feedback go to and get processed in
[00:20:36] <Valen> I was thinking of using a 7i30
[00:21:56] <jp_> dont the 7i25 have encoer input?
[00:22:01] <jp_> encoder
[00:22:28] <CaptHindsight> http://www.linuxcnc.org/index.php/english/forum/18-computer/18917-faq-pci-parallel-port-cards
[00:22:36] <nspiel> http://www.mesanet.com/pdf/motion/7i25man.pdf
[00:23:02] <CaptHindsight> I'm still not sure after ^^ "Try to avoid the 9805 and 9815 chips which are quite old and were a bit flakey, often difficult to set as input.
[00:23:02] <CaptHindsight> The 9845, 9865 and 9901 chips (often designated MCS9845, MCS9865 and MCS9901) work fine"
[00:24:07] <jp_> nspiel: the encoders would go back to the 7i25. they would show up in hal as long as a firmware for the 7i43 supports it
[00:24:27] <jp_> PCW could talk to that
[00:24:50] <nspiel> so should firmwire for the 7i43 support it?
[00:24:50] <CaptHindsight> so maybe if you drive STEP and DIR from the parallel port pins any of them work, but only the newer devices work with the 7i45
[00:25:01] <nspiel> they have the pinouts to connnect to the 7i25
[00:25:31] <CaptHindsight> err 7i43
[00:25:59] <nspiel> yeah
[00:26:13] <jp_> most likely
[00:26:29] <jp_> but check with pcw
[00:26:43] <nspiel> pcw?
[00:27:12] <nspiel> here is what the datasheet says
[00:27:13] <nspiel> INTRODUCTION The 7I25 is a dual channel, 150 watt per channel H-Bridge driver intended for use with the 6I27, 4I27, 4I34, or 7I60 servo motor controller cards.
[00:28:39] <jp_> pcw_home: you around? ^
[00:30:40] <Valen> pshaw 7i40 is where its at
[00:31:27] <Valen> paticularly after you defeat the current limiting and hang 500W motors off them direct drive from the ball screws ;-?
[00:32:15] <jp_> yeah the mesa stuff is pretty stout!
[00:32:21] <Valen> brb going to try to make internet not suck
[00:35:01] <nspiel> i feel like ihave talked to pc home about this before
[00:36:57] <jp_> like i said it shoud but check with him before you buy
[03:17:45] <Loetmichel> mornin'
[03:32:28] <DJ9DJ> moin
[06:16:50] <skunkworks> does it actually go that fast?
[06:16:56] <skunkworks> heh
[06:17:00] <skunkworks> wrong window
[06:18:12] <skunkworks> so - when you are jogging 1 axis - the vel says 54 when the axis is moving?
[06:18:22] <skunkworks> damn it
[07:07:20] <PetefromTn> Good Morning everyone
[07:07:26] <DJ9DJ> hi pete
[07:07:43] <PetefromTn> DJ9DJ: hi DJ
[08:31:22] <spack> mo'nin
[10:57:49] <CaptHindsight> any good sources for analog input interpolator boards/modules like http://www.motrona.eu/PDF/Si251_e.pdf
[11:02:04] <pcw_home> make a little PCB with the IC-HAUS interpolators?
[11:04:12] <CaptHindsight> heh, I can, but I'd like to buy something today
[11:06:16] <CaptHindsight> they make eval baords
[11:12:22] <Aero-Tec2> hello CaptHindsight hope your not still at work
[11:13:00] <Aero-Tec2> where do you live?
[11:14:04] <Aero-Tec2> you we do not seem to get much sleep or it is getting close to the time you will be heading that way
[11:15:46] <Aero-Tec2> looked at the time line, guess you could have had a good snooze, just so little talk it look like your up all night
[11:16:49] <CaptHindsight> I'll sleep in Sept
[11:19:24] <jdh> it's always september, somewhere on the .net
[11:22:50] <Aero-Tec2> lol
[11:24:41] <Aero-Tec2> not sure where the we came in there, you we, what the h is that. lol
[11:32:36] <CaptHindsight> pcw_home: do any of the mesa servo boards handle 1V PP sin/cos input?
[11:41:21] <pcw_home> No
[11:47:09] <pcw_home> we will probably make a little interpolater PCB using the IC-HAUS NQC chip when I get around to it
[11:47:11] <pcw_home> (mainly for people with old Heidenhaine linear scales)
[11:48:05] <CaptHindsight> everyone has been EOLing them
[11:49:57] <CaptHindsight> 1v analog out is still an option on most linear motor positioners
[11:50:08] <pcw_home> Lots of people have asked for it. We will probably put a uC on it
[11:50:09] <pcw_home> (emulating a I2C EEPROM) for easier configuration
[12:06:30] <CaptHindsight> pcw_home: that would be handy, with SPI or I2C
[12:10:07] <CaptHindsight> pcw_home: http://www.rockwellautomation.com/anorad/products/positioning-stages/lw10.page typical analog out application
[12:10:45] <pcw_home> the interpolator chip has a I2C EEPROM for setup , we would add a
[12:10:47] <pcw_home> uC with serial interface (and I2C EEPROM emulation)
[12:10:48] <pcw_home> to make it easier for the user to set up the interpolation factor etc
[12:12:33] <CaptHindsight> http://www.ichaus.de/product/iC-NQC
[12:17:20] <pcw_home> Yes that one
[12:21:03] <CaptHindsight> pcw_home: any use for the BiSS C protocol?
[12:33:52] <pcw_home> BISS (or SSI) can be used with the iC-NQC for absolute (one cycle position)
[12:33:54] <pcw_home> and for cases where the interpolation factor is such that the incremental outputs
[12:33:55] <pcw_home> are too fast
[12:38:19] <IchGuckLive> hi cpresser wacken live
[12:41:55] <Xfriend> I had build a cnc with couple nema17 and I want to use with pronterface or any other software which one do guys recommend to use
[12:42:40] <IchGuckLive> Linuxcnc
[12:43:05] <CaptHindsight> pronterface is an Arduino application
[12:43:19] <IchGuckLive> what parts are you going to build on this cnc
[12:43:54] <IchGuckLive> Xfriend: why dont you go for a parpot interface
[12:44:30] <jmasseo> has anybody done a standalone linuxcnc on beaglebone?
[12:44:58] <CaptHindsight> jmasseo: yes, there's a youtube video is you search
[12:45:03] <CaptHindsight> id/if
[12:48:30] <CaptHindsight> jmasseo: do you want to use it for UI as well?
[12:49:40] <jmasseo> CaptHindsight: yeah, as like a normal CNC controller attached to a machine arm
[12:49:43] <jmasseo> vs a laptop
[12:50:19] <CaptHindsight> http://www.youtube.com/watch?v=AK_OYoNOBDQ
[12:50:57] <CaptHindsight> they use a BeBoPr board along with the BBB
[12:51:42] <CaptHindsight> http://circuitco.com/support/index.php?title=BeBoPr_Cape
[12:52:21] <CaptHindsight> and the gui is running on a remote X display
[12:53:42] <CaptHindsight> jmasseo: not sure where they are with using the on SOC GPU or how well that will work for stand alone
[12:57:55] <jmasseo> i think with the normal BeBoPr board, it uses pins that are needed for video?
[13:02:44] <mozmck> jmasseo: see here: http://bb-lcnc.blogspot.com/
[13:03:25] <mozmck> top post mentions the BeBoPr-Bridge board which fixes that problem.
[13:04:13] <JT-Shop> CaptHindsight: when you get a chance check my anodiznig page for correctness. http://gnipsel.com/anodizing/anodizing.html
[13:04:16] <JT-Shop> bbl
[13:05:48] <CaptHindsight> mozmck: it's getting pretty tall :)
[13:05:57] <mozmck> skyscraper!
[13:12:01] <spack> anyone know of a laser irc channel?
[13:12:10] <spack> #laser and #lasers are almost empty
[13:12:34] <IchGuckLive> laserfreak
[13:12:50] <spack> which server?
[13:13:07] <IchGuckLive> http://www.laserfreak.net/forum/viewforum.php?f=203
[13:14:33] <spack> :S
[13:42:40] <mutilator> anyone want to buy a loadmaster 80 linear actuator? lookin to get rid of this thing..
[14:19:29] <ReadError_> holy cow
[14:19:34] <ReadError_> this cyclone is pretty sweet
[14:19:46] <ReadError_> sucked some stuff up it shot to the bottom of the bucket like a rocket
[14:24:43] <jdh> just like it was made for that!
[14:26:16] <JT-Shop> what no video feed
[16:05:36] <NickParker> hmmmm... has anybody used singpost before?
[16:05:54] <NickParker> i got registered air mail through them (10 days IIRC) and it's been more than 10 days
[16:06:15] <NickParker> tracking says "arrived overseas(country code: US) for the 26th
[16:19:05] <Tom_itx> no just HK post
[16:19:16] <Tom_itx> and it's slower than molasses
[16:20:01] <Tom_itx> 14 or more days is about average
[16:20:41] <cpresser> is anybody of you guys at OHM2013?
[16:20:43] <cpresser> if yes, meet me for a beer @NeighbourhoodNerds :)
[16:26:38] <CaptHindsight> Geestmerambacht festival grounds, 30km north of Amsterdam !
[16:28:54] <DJ9DJ> gn8
[16:28:55] <CaptHindsight> cpresser: any resistance getting in? :)
[16:54:59] <cpresser> CaptHindsight: about 2k :D
[17:04:52] <skunkworks> http://groups.yahoo.com/group/mach1mach2cnc/message/141197
[17:32:08] <tjb1> Someone in NY got any PTFE?
[17:32:45] <Tom_itx> i meet one of those criteria
[17:36:15] <CaptHindsight> tjb1: sheet, film, suspension? Looking for a supplier or just samples?
[17:38:58] <tjb1> CaptHindsight: I forgot to get some for my 3d printer to run 1.75mm filament
[17:39:05] <tjb1> Hit Mcmaster but I dont know if it will arrive by tomorrow
[17:40:12] <CaptHindsight> does Adafruit sell it? they sell the printer parts
[17:40:56] <tjb1> Not sure, I got a Budaschnozzle and forgot to order the tube. Went to look today and they don't even list the tube for this version, oh well
[17:43:49] <tjb1> Ah no r00tarded
[18:18:19] <JT-Shop> CaptHindsight: did you get a chance to check my page for gross errors?
[18:23:56] <CaptHindsight> JT-Shop: it looked like you were still working on it
[18:25:45] <CaptHindsight> JT-Shop: are you going to strip the oxide off the cathodes after every use?
[18:29:12] <JT-Shop> I didn't know anything about that
[18:29:35] <JT-Shop> do you use a bath like stripping anodize off?
[18:30:24] <CaptHindsight> http://support.caswellplating.com/index.php?/Knowledgebase/Article/GetAttachment/91/1
[18:31:20] <CaptHindsight> they have a non chromate system
[18:32:18] <JT-Shop> I have that one printed out
[18:33:27] <CaptHindsight> http://www.stonechemical.com/sitemap.asp they have lots of associated products
[18:35:13] <CaptHindsight> http://www.stonechemical.com/racks.asp
[18:35:24] <tjb1> You can see my printer going here - https://plus.google.com/hangouts/_/2291ad0f171ef69e0fc785e028b81dca7e1f8144?hl=en
[18:39:12] <CaptHindsight> JT-Shop: http://www.anodizing.org/Reference/reference_guide.html has lots of useful info
[18:39:34] <JT-Shop> thanks
[19:28:55] <Tom_itx> JT-Shop, what's different in the process you're doing and the LCD process?
[22:15:41] <nspiel> is pchome here?
[22:17:25] <nspiel> pcw_home
[23:14:46] <pcw_home> sort of here, sort of there...
[23:28:11] <CaptHindsight> pcw_home: I'm looking at trying out the 8i20's, is encoder feed back linked through HAL via spare encoder inputs on say a 7i77?
[23:30:45] <pcw_home> Yes, normally a 8I20 would be used with a 7I52 (50 pin) or 7I85 daughtercard
[23:30:47] <pcw_home> that just has encoder and sserial connections
[23:31:20] <pcw_home> but the 7I77 encoder inputs will do as well
[23:32:25] <CaptHindsight> there are multiple servos in the system, some big some small
[23:33:23] <pcw_home> BTW if you use our windows utilities to set any non-volatile parameters in the 8I20, refetch the utils
[23:33:25] <pcw_home> someone on the forum found a bug with them when run from a batch file
[23:33:40] <CaptHindsight> I forget that you mentioned something about trapezoidal having issues or was in sinusoidal?
[23:34:46] <pcw_home> 8I20 does not like trapezoidal much (you may have to detune the current loop if you are using full current)
[23:35:21] <pcw_home> because of the steps at hall transitions
[23:36:51] <pcw_home> also best to use master or at least John K's patched BLDC in master
[23:37:20] <CaptHindsight> i think the servos ~ peak 8.1A @320V, if I drive 2 in parallel ~16A peak, 4.6 continuous rms
[23:39:39] <pcw_home> Parallel would be interesting (the rotors/carriages need to be synced)
[23:39:45] <CaptHindsight> thats just outside their range anyway
[23:40:02] <CaptHindsight> yeah, two linear motors side by side
[23:40:40] <CaptHindsight> 3/4" 6061 plate does it pretty well
[23:41:16] <CaptHindsight> the carriages are 12' x 12' each
[23:41:41] <CaptHindsight> and only 1 encoder is used
[23:42:48] <pcw_home> interesting (we've run a linear motor with the 8I20)
[23:42:50] <pcw_home> unfortunately with linear motors you cant just play around
[23:42:51] <pcw_home> by taking the drive belt off, if you make a mistake, you can fly into the stops
[23:43:25] <CaptHindsight> whats the 2200W limited based on? the ability to cool them mosfets?
[23:44:04] <CaptHindsight> sorry my spelling has gone to hell, too tired :)
[23:44:54] <CaptHindsight> we have big springs on the carriage in case of trouble
[23:45:12] <pcw_home> Thats Fairchilds number. I suspect it would be ok with say 3500W continuous
[23:45:15] <pcw_home> with _good_ heatsinking
[23:45:53] <pcw_home> thats ~15A RMS 230V
[23:47:06] <CaptHindsight> the load on the drives is so heavy it can't move faster than about 12" per sec
[23:47:21] <CaptHindsight> it's for precision vs speed
[23:47:46] <pcw_home> how long is the travel?
[23:48:01] <CaptHindsight> 18"
[23:48:12] <pcw_home> so not too big
[23:48:26] <CaptHindsight> accel and decel is ~700ms
[23:48:34] <CaptHindsight> each
[23:48:59] <CaptHindsight> not a rocket
[23:49:08] <pcw_home> usually people choose linear motors for high speed (like Pick&Place)
[23:50:13] <pcw_home> but I guess 0 backlash is nice
[23:50:48] <CaptHindsight> this will move a 100lb load accurate to a couple microns
[23:51:18] <pcw_home> Ahh that quite a load for linears
[23:52:33] <pcw_home> I'm afraid my eyes are hooding over...
[23:52:34] <pcw_home> 'nite
[23:52:46] <CaptHindsight> same here