#linuxcnc | Logs for 2015-06-20

[02:06:28] <Deejay> moin
[09:25:46] <jthornton> baaa my network addresses have changed and backuppc is confused
[09:31:11] <archivist> set fixed IPs everywhere that does not happen then, or persist about trying to set your dhcp device to give the same ip to devices
[09:32:05] <JT-Shop> I need to figure out how set fixed IPs
[09:34:10] <archivist> system/network on this old box
[09:35:03] <Tom_itx> JT-Shop, what os?
[09:35:24] <JT-Shop> both
[09:36:36] <Tom_itx> i thought you did that for linux already
[09:37:11] <JT-Shop> nope
[09:39:59] <Tom_itx> JT-Shop, pm
[09:40:26] <Tom_itx> you said you didn't need broadcast though
[09:44:58] <JT-Shop> yea, I have to work tomorrow
[10:12:11] <MattyMatt> JT-Shop, you have to set fixed IP on each machine, usually in same range as DHCP gives
[10:12:42] <MattyMatt> IIRC when I had working well, I used high numbers in the range so DHCP was still available
[10:13:24] <archivist> I restrict the dhcp range for temporary things like laptops
[10:27:28] <MattyMatt> that reminds me. gotta make front slope shelves for my laptop farm
[10:28:18] <MattyMatt> and buy 2 dozen patch cables
[10:29:09] <MattyMatt> I don't need that many machines on in summer tho
[10:33:29] <MattyMatt> archivist did you see that film I posted the other day? there was some nice stuff in there. carbide inserts and ferrite core memories being made, all to stockhausen type score
[10:36:34] <MattyMatt> making inserts looks quite easy :)
[10:38:07] <archivist> didnt notice it
[10:39:43] <MattyMatt> https://www.youtube.com/watch?v=lAr5_idJbFY well worth 16 minutes
[10:40:51] <MattyMatt> ah czech. I assumed russian. I missed the beginning last time, it was the music that made me look. YT autoplay
[10:51:24] <MattyMatt> aargh hypnotised again by those nut rolling machines
[10:52:03] <MattyMatt> I expect I'll watch this enough to able to follow it just with the music
[13:58:01] <schwendi> Hello, folks. I am fighting with my CNC mill (and linuxcnc). I do not get auto-homing working. Can somebody help me, please?
[13:58:42] <schwendi> I have all three lilit switches in parallel. X=left, Y=rear, Z=uppermost, they are closing when pressed.
[14:00:27] <schwendi> archivist, are you here?
[14:11:13] <skunkworks> what is it doing now?
[14:17:44] <schwendi> Hi. We can meanwhile start the homing process, but the Z-Axis is not stopping to move when the end-switch is reached.
[14:19:18] <schwendi> I have a moing room of ~320x300x60 mm (X/Y/Z) and I want to set the home position to x0 (= left), y=0 (front, but stop switch is in rear), and z0 (but stop switch is at 60 mm
[14:22:26] <schwendi> All limit switches are in parallel on pin 10 (as input), the optocoupler does a pulldown to ground.
[14:23:42] <schwendi> Shouldn't the parallel port have an internal pullup on this pin?
[14:38:30] <_methods> this harbor freight bandsaw is making me pay the iron price
[14:38:45] <_methods> i havent lost this much blood in ages
[14:38:52] <schwendi> Pin 10 is 4.3V when no limit switch is pressed, it goes down to 1.87V when I press a limit witch (pulled by a PC123 optocoupler)
[14:40:21] <schwendi> Should be sufficient?
[14:43:06] <PCW> only going down to 1.87V when OPTO grounds the parallel port pin suggests you don't have enough LED current in the OPTO
[14:45:37] <cthompson> I have this image of you leading a raiding party into a strip mall parking lot, raping and pillaging, then loading bandsaws and mini screwdriver bits onto your boats
[14:48:15] <adam3999> hey guys, when i'm modifying *.ini and *.hal files, is there any way to reload settings without having to completely restart linuxcnc and lose home?
[14:55:52] <_methods> what has drowned cannot be killed lol
[15:10:05] <MrSunshine> now thats deep ... phun intended
[15:10:06] <MrSunshine> :P
[15:26:23] <_methods> hehe
[17:17:37] <Deejay> gn8
[17:23:26] <Computer_barf> heya
[17:31:05] <CaptHindsight> pcw_home: whats the max data bandwidth of the ethernet connection into the 7i90?
[17:32:13] <CaptHindsight> I'm wondering how many inkjet nozzles it can drive and how fast
[17:32:38] <CaptHindsight> so it's just one way data, PC ---> 7i90
[17:36:38] <Loetmichel> you know that inkjet nozzles die VERY easily if driven too hard or without ink?
[17:37:40] <Computer_barf> hey _methods , sorry to bug you about this twice but could you relink me to that link on how to set up a button to set the current location to xyz0 and touchoff?
[17:37:52] <Computer_barf> i seem to have lost my link to the irc logs here
[18:07:39] <CaptHindsight> Loetmichel: they also die by just looking at them wrong
[18:45:34] <Loetmichel> CaptHindsight: right ;-)
[18:50:16] <furrywolf> small pile of yard sale stuff today... a 9" worm-drive saw, a pair of wharfdale 12" woofers, 15ft of 6/4 soow with l14-50 plug, some 6.5" + 1" component car speakers, some assorted craftsman metric wrenches, a kenwood receiver (pretty small, probably 25W/ch), some chain, and a few small things.
[18:51:19] <furrywolf> I have a pair(ish) of jbls with no woofers... probably toss the wharfedale woofers in them and make shop speakers.
[18:53:20] <furrywolf> they won't sound great, but they'll make acceptable shop speakers.
[18:59:05] <Loetmichel> furrywolf: i have 2 jbl control one here
[18:59:13] <furrywolf> woofers or complete speakers?
[18:59:18] <Loetmichel> thats all you need for shop speakers
[18:59:23] <Loetmichel> fullrange
[18:59:41] <furrywolf> I'd love a pair of correct 12" woofers for an L100/4311-series.
[19:00:07] <Loetmichel> the control one a re near field speakers
[19:00:25] <furrywolf> yes. which model do you have?
[19:00:31] <Loetmichel> they are supposed to deliver a clean sound for mixers
[19:00:37] <furrywolf> I have a pair of JBL 4311s
[19:01:15] <furrywolf> I also have a L100 with no woofer and an L166 with no woofer, that I plan on sticking the Wharfedale woofers in and having a pair of crappy mismatched shop speakers. :)
[19:01:23] <Loetmichel> http://www.beamershop24.net/regallautsprecher/jbl-control-one-2-wege-regallautsprecher-schwarz-paar/?gclid=CMqwzdW4n8YCFXQatAodmwYADg
[19:01:25] <Loetmichel> these
[19:01:31] <Loetmichel> just 20 years older ;-)
[19:02:07] <furrywolf> ah, those... I thought you were just using "control ones" as a description, not a model. my bad. :P
[19:02:14] <Loetmichel> :-)
[19:02:37] <furrywolf> those are too new. :P
[19:02:55] <furrywolf> google "jbl 4311" to see my pair
[19:03:07] <furrywolf> I'd google and paste an image, but my internet connection is really sucking.
[19:03:20] <Loetmichel> nice ones
[19:04:32] <furrywolf> I also have an L100 and an L166, both of which I got free at different yard sales, with no woofers... they're both similar to the 4311, but consumer versions. I figure the wharfedale woofers I just got won't be a great match, but will turn them into a set of shop speakers, rather than their current status as shop-space-taker-uppers.
[19:04:54] * Loetmichel used to work for a stage rental service
[19:05:28] <Loetmichel> i heard speaker/amplifier sets that could choke a 30kW genset ;-)
[19:05:56] <furrywolf> lol
[19:06:30] <furrywolf> someone I used to know had an amp that would trip the 30A breaker on his 240V dryer outlet... and a set of quite nice speakers, but not ones for the music he listened to.
[19:07:34] <Loetmichel> thats me 20++ years ago: http://www.cyrom.org/palbum/main.php?g2_itemId=2835
[19:07:55] <furrywolf> http://www.davidsaudio.com/assets/images/autogen/a_QLS_1.jpg those speakers
[19:08:37] <furrywolf> note they have 14 tweeters and 1 woofer. he listened to hard rock. they replaced the first several woofers under warranty...
[19:08:46] <Loetmichel> hihi
[19:09:08] * Loetmichel used tomstack a few Turbosound TMS3 for most stages
[19:09:19] <furrywolf> quite fancy speakers, but built for classical, not rock.
[19:09:31] <furrywolf> he'd blow a woofer every few months...
[19:09:35] <Loetmichel> bigges we had was 12 per side and 36 TCS118 beneath the stage
[19:10:36] * furrywolf thinks those speakers are very poorly designed, having so much more tweeter than woofer...
[19:11:18] <Loetmichel> thats 36* 18" woofers, 48* 15" bass, 48* 10" mid and 24* 2" horn drivers for high
[19:11:19] <furrywolf> http://www.infinity-classics.de/models/Quantum-series-1976/Quantum-Line-Source-QLS-1/QLS_1_7_1a.jpg
[19:12:53] <Loetmichel> furrywolf: depends
[19:13:25] <furrywolf> depends on whether you play music with nothing below a couple hundred hz... :P
[19:14:29] <furrywolf> he was using them to play hard rock in a large room. every few months he'd blow a woofer, as in order to get bass that anywhere near matched the treble, you had to pump a lot of watts into them...
[19:14:40] <furrywolf> and they were some weird double-voice-coil thingy that cost $$$$.
[19:16:36] <Loetmichel> i would say the bad design is in the distance between the tweeters
[19:16:44] <Loetmichel> they are a bit wide spread
[19:17:39] <Loetmichel> furrywolf: i've ssen a 18" PA speaker once that decided to jump oout of its chassis
[19:17:52] <furrywolf> my living room has lots of woofers. lol
[19:18:07] <Loetmichel> teared the carton right out of the steel and got it flying
[19:18:20] <furrywolf> I have a pair of sansui sp-3500, sp-7500 (I think, might have an x in there too), and pioneer cs-a700... 16", 14", and 12" woofers. :)
[19:18:28] <furrywolf> total of 32 drivers
[19:18:32] <Loetmichel> (amplifier got a short... at 2,5kw
[19:19:16] <furrywolf> fun
[19:19:30] <Loetmichel> the 600W 18" speaker didnt found that funny and decided to leave the chassis ;-)
[19:19:42] <FinboySlick> furrywolf: I have a couple of those: http://gizmodo.com/194449/altec-lansing-a7-1950s-studio-monitors-for-6100-each-craaaaazay
[19:20:41] <FinboySlick> They're not what I'd call practical.
[19:21:09] <furrywolf> lol
[19:21:16] <FinboySlick> Quite punchy though.
[19:21:18] <furrywolf> the JBL4311 was the most popular studio monitor for a while too
[19:21:29] <furrywolf> or most popular control monitor, or something
[19:21:44] <Loetmichel> FinboySlick: haha, tell me about punch
[19:22:00] <Loetmichel> the PA speakers i used to set up had 2" horn drivers
[19:22:13] <furrywolf> I don't like horns...
[19:22:15] <Loetmichel> they could bite your ear off from 20meters away ;-)
[19:22:27] <FinboySlick> I want to re-build the cabinets as Klipsch LaScala
[19:22:34] <FinboySlick> They're a tad more compact.
[19:22:43] <furrywolf> my sansuis are too horny, but not nearly as bad as my klipschs. I have my klipshs in the shop, as they're too unpleasant to listen to unless you're using power tools at the same time.
[19:22:46] <Loetmichel> 132dB(a) @ 1W in 1m distance
[19:23:43] <furrywolf> hoping to replace the klipschs with my mismatched mutant jbls. the jbls with random woofers won't sound good, but most things will sound better than the klipschs!
[19:24:12] <FinboySlick> I'm pretty big on klipsch for movies.
[19:24:31] <furrywolf> I don't like movies.
[19:24:48] <furrywolf> I also don't like my music to sound like plastic woofers and plastic horns, which is what my klipschs make everything sound like.
[19:24:56] <Loetmichel> https://www.youtube.com/watch?v=DhctfhyBO3U
[19:25:13] <FinboySlick> They're very efficient and clear. What model of klipsch do you have?
[19:25:25] <Loetmichel> these speakers were made for rock'n roll stage
[19:25:30] <Loetmichel> undestructible
[19:25:40] <furrywolf> I can't view video right now.
[19:26:16] <furrywolf> FinboySlick: don't remember. I think they have a 10 in the model number, but could be wrong. they're two plastic woofers and a horn, and sound like two plastic woofers and a horn. :)
[19:26:36] <furrywolf> I suck.
[19:26:38] <furrywolf> KG4
[19:26:41] <furrywolf> no 10 at all.
[19:27:07] <FinboySlick> furrywolf: Well, they went a bit bose for a while and started selling cheap crap with their name on it. I wouldn't buy anything that's not reference series.
[19:27:39] <furrywolf> they are, by far, the worst-sounding "hifi" speakers I have ever heard. actually, maybe not that bad... I once owned a pair of BICs that fucking sucked.
[19:27:42] <Loetmichel> furrywolf: http://www.proavrentals.net/products/turbosound-tms-3-full-range-speaker-rental
[19:28:32] <furrywolf> http://www.klipsch.com/kg-4/details
[19:28:54] <FinboySlick> They bought Energy now so their low-end is getting a fair bit better. I bought this set earlier this year and have been *very* satisfied: http://www.energy-speakers.com/products/take-classic/?sku=TK-CLASSI-5-1
[19:29:36] <furrywolf> http://img.canuckaudiomart.com/uploads/large/113444-klipsch_kg4s.jpg
[19:30:17] <FinboySlick> Somehow that doesn't look like it would work very well. Ah the 90s, time of gimmicks.
[19:31:08] <FinboySlick> They're tiny little things but good, sturdy and thick material, Perfect for their size.
[19:31:14] <furrywolf> ... renting them for 28 days costs 18 times the daily rate, while renting them for 7 days 4 times costs 16 times the daily rate. lol
[19:31:45] <furrywolf> I have no use for 5.1
[19:32:30] <FinboySlick> Well yeah, as you said you don't do movies. I use 'em for gaming.
[19:34:51] <furrywolf> I also don't do games. lol
[19:50:00] <malcom2073> Well aren't you boring? :P
[19:51:58] <ffurrywol> ?
[20:37:45] <sector_0> what do you guys think about using wood for a CNC machine?
[20:38:32] <sector_0> I've heard a couple persons say that wood warps in response to changes in humidity
[20:38:57] <sector_0> does this cause a significant problem?
[20:39:31] <sector_0> and what type of wood do these machines use?
[20:41:06] <roycroft> use mdf and you'll be fine
[20:41:41] <roycroft> assuming you're building a router
[20:42:02] <roycroft> if you're building a milling machine or a lathe or something else that's semi-precision or precision then you should not use wood
[20:47:06] <sector_0> roycroft, ok thanks
[21:16:39] <ffurrywol> these woofers might be a better match for my ess amt1s... but they take 10" not 12" and would need kludging.
[22:45:21] <ffurrywol> meh. I just replaced the tinsels on one of my pioneer woofers, and got ugly grey cold solder joints. pisses me off, but it's hard to solder to something that's on a cone covered in glue.
[22:54:35] <cradek_> ffurrywol: you're not using some lead-free solder abomination are you?
[22:55:00] <cradek_> huh what's with my underscore
[22:55:41] <pcw_home> lead free always makes ugly grey cold solder joints :-)
[22:56:01] <cradek> it's not just my bad luck?
[22:56:44] <pcw_home> machine assembled its fine but doing repairs with it is terrible
[22:57:03] <cradek> that's good to know
[22:57:18] <cradek> when they started coming out I tried about 3 lead-free concoctions and none of them ... worked at all
[22:57:29] <cradek> like they wouldn't melt and stick things together
[22:57:45] <cradek> so I tossed 'em and went back to my huge old spool and I haven't tried since
[22:57:51] <cradek> I figured it would be better by now
[22:58:20] <pcw_home> much tricker than lead based solder (at least the tin/silver stuff we use)
[22:59:32] <pcw_home> it is never very shiny and fussier about having lots of flux
[23:00:01] <ffurrywol> this is regular 60/40... just trying to solder to glue! heh
[23:00:22] <cradek> ah!
[23:00:24] <ffurrywol> I soldered the new tinsel to the old solder joint, which was covered in glue. I attempted to scrape it off, but apparantly wasn't sufficiently successful.
[23:01:20] <ffurrywol> pcw_home: I might be able to buy a 7i76e in a couple weeks... got any on hand? anything I need to buy to go with it? my rtfming suggests I just need to connect my 24v to it and it magically works.
[23:01:48] <pcw_home> I think we are down to about 0 :-(
[23:02:04] <ffurrywol> make more! :P
[23:02:15] <cradek> do you have the whole inventory in your head?
[23:02:22] <ffurrywol> yes, he does.
[23:02:25] <pcw_home> the first 50 sat around for about 2 years
[23:03:00] <pcw_home> Yes building a new batch now
[23:03:40] <ffurrywol> also, someone in here requested you hurry up on a 7i77e for him. :P
[23:03:44] <pcw_home> also 7I96 which is cheap version
[23:06:03] <pcw_home> Yeah in my voluminous spare time (probably could do it the same way as the
[23:06:05] <pcw_home> 7I76e, graft a 7I80 on a 7I77 so I can minimize re-layout)
[23:06:36] <ffurrywol> the 7i77e is listed as existing in a couple of places. heh.
[23:07:36] <pcw_home> I built some test firmware to check fittage of various configs
[23:08:07] <englishman> anyone can recommend the best mobo with parport at the moment
[23:08:15] <englishman> atom mini itx?
[23:08:38] <ffurrywol> no matter what mobos people suggest, someone finds they work great, and someone else finds they're completely unusable.
[23:09:14] <englishman> O.o
[23:09:24] <pcw_home> J1800s or J1900s are decent
[23:09:25] <pcw_home> the Atom MBs have good RTAI base thread latency but I find them terribly slow
[23:09:27] <cradek> take our live usb boot and a $20 to goodwill and pick whatever tests well
[23:10:07] <ffurrywol> pcw_home: when you said the 7i96 was the cheap version, did you mean 7i92?
[23:10:28] <ffurrywol> because I can't find a 7i96 existing. :)
[23:11:43] <pcw_home> 7I96 is 7I92 with built in 5 axis step/dir breakout +spindel encoder + 6x 2A floating outputs and 11x OPTO inputs
[23:12:14] <englishman> j1900 is a couple isn't it? does it come embedded?
[23:12:20] <englishman> err cpu
[23:12:21] <pcw_home> (and one 26 pin PP header)
[23:13:03] <pcw_home> the J1900 is a 2 GHz quad core intel CPU, replacement of the Atoms basically
[23:13:10] <ffurrywol> pcw_home: is this a new product? I can't find it...
[23:13:18] <pcw_home> (J1800 is 2/4 GHz dual)
[23:13:24] <pcw_home> Its new
[23:13:33] <ffurrywol> ah
[23:13:40] <englishman> cool stuff
[23:13:53] <ffurrywol> so what's different between a 7i76e and 7i96?
[23:13:56] <englishman> mini itx, must be replacing old atom
[23:14:07] <englishman> ya
[23:14:16] <englishman> :-) sorry on phone
[23:14:41] <pcw_home> mainly less I/O, smaller FPGA, no analog spindle interface
[23:15:09] <ffurrywol> hrmm, so would probably work fine for my application, since I only have on/off spindle...
[23:15:46] <ffurrywol> stupid capacitor start motors. :)
[23:16:36] <englishman> hmm will definitely get a j1900 then
[23:18:22] <pcw_home> When I get some free time, I'll try this on hm2_eth
[23:18:24] <pcw_home> http://www.newegg.com/Product/Product.aspx?Item=N82E16856164024&cm_re=gigabyte_bxbt-_-56-164-024-_-Product
[23:19:07] <ffurrywol> is the 7i96 going to be available in the near future, or should I go for the 7i76e?
[23:19:54] <pcw_home> next batch of 7I76es will be available first
[23:23:52] <pcw_home> I do have some test 7I76es around (theres one on my desk here running linuxcnc for the last 6 months or so, its rather dusty)
[23:24:34] <ffurrywol> heh, burn-in testing?
[23:25:45] <pcw_home> well hm2-eth is new so its being pounded on quite a bit
[23:26:59] <norias> anyone familiar with rolling ring drives?
[23:29:07] <ffurrywol> I have a similar drive with sets of ball bearings with their outside edge running on the shaft at an angle...
[23:29:53] <ffurrywol> rather than their inside edges
[23:30:02] <pcw_home> I know in Andy pughs mill retrofit he spins the ball nut, and the ball screw is stationary
[23:30:46] <ffurrywol> I imagine the operating properties are similar, but I've never used a rolling ring one.
[23:31:08] <norias> i've seen folks attempt what you are discussing
[23:31:14] <norias> but the mounts were 3d printed
[23:31:25] <norias> and it didn't fair well from a repeatability standpoint
[23:31:49] <norias> i'm thinking of testing out this rolling ring system
[23:31:51] <ffurrywol> http://fw.bushytails.net/slider02.jpg that's the one I have.
[23:31:53] <norias> it sounds interesting
[23:32:10] <norias> right, yeah, i've seen stuff similar
[23:32:13] <ffurrywol> no 3d printing. heavy aluminum. :)
[23:32:16] <norias> have you tested it under load at all?
[23:32:28] <norias> it seems a common solution in some areas
[23:32:41] <ffurrywol> yes. it grips until a certain force, then it slips. tightening the block increases this force.
[23:32:58] <norias> sounds about right
[23:33:00] <pcw_home> Many many years ago I designed a boat loader that used those
[23:33:20] <ffurrywol> it's not suitable for anything requiring open-loop positioning. for a cnc machine, you'd need glass scales and closing the loop that way.
[23:33:24] <norias> I think I'll make something like what you've got there, furrywolf
[23:33:26] <norias> and try it
[23:33:41] <norias> i'll test it side by side with the other system
[23:34:03] <ffurrywol> I don't think it's repeatable - that is, you drive it back and forth the same number of rotations, I don't think you end up in the same spot with any reliability.
[23:34:10] <norias> ok
[23:34:22] <pcw_home> (for diffusion furnaces, it had potentiometer feedback)
[23:34:25] <norias> have you tried it?
[23:34:48] <ffurrywol> http://fw.bushytails.net/slider01.jpg the unit I got uses a 10-turn precision pot and a timing belt for position feedback, but that wouldn't be accurate enough for a cnc machine.
[23:35:19] <ffurrywol> I bet no one here can guess what I pulled that out of and what it did. :P
[23:35:34] <norias> some kind of packaging equipment,
[23:35:38] <norias> or material handling?
[23:35:45] <ffurrywol> nope
[23:35:50] <norias> well, i tried
[23:36:00] <ffurrywol> lol
[23:36:37] <ffurrywol> http://fw.bushytails.net/slider03.jpg http://fw.bushytails.net/slider04.jpg more views of the angled bearings
[23:37:29] <ffurrywol> I kid you not, that device was a precision boob squisher.
[23:37:58] <ffurrywol> from an x-ray mammogram machine scrapped at the local scrapyard
[23:39:25] <norias> i wonder
[23:39:35] <norias> what would happen if you did two side by side
[23:39:44] <norias> geared the shafts together
[23:41:38] <ffurrywol> and?
[23:45:06] <ffurrywol> I mean, the obvious answer is they both move... what do you want to test? heh
[23:50:22] <norias> that didn't go well for me
[23:51:04] <ffurrywol> what didn't?
[23:52:48] <norias> internet connection went bad for a moment
[23:53:11] <ffurrywol> ah
[23:53:29] <ffurrywol> I was figuring your roller experiment managed to knock out the local powerplant or something. :P
[23:54:10] <norias> experiments
[23:54:14] <norias> maybe next month
[23:54:24] <norias> if revenue / sales keep up
[23:57:09] <ffurrywol> I still have that actuator (the automatic boob squisher), but I had it in a damp storage unit, and it got annoyingly rusty... the shaft needs a good sandpapering before I find a project for it.
[23:58:13] <norias> right on