#emc | Logs for 2011-01-16

[00:00:28] <jrshaul> ?
[00:00:30] <JT-Shop> no, I just have slow connection... I'm used to it :)
[00:00:41] <Valen> was buffering on mine too
[00:00:50] <skunkworks> jrshaul: look at cnczone - lots have done rack and pinion projects
[00:01:03] <Valen> jrshaul: you want to keep crap out of any system you put in
[00:01:04] <jrshaul> Hmm.
[00:01:11] <skunkworks> maybe youtube is running a little slow tonight
[00:01:18] <Valen> crap on a rack and pinion will move your position
[00:01:22] boelkmoeller3_ is now known as boelkmoeller3
[00:01:40] <JT-Shop> jrshaul: rack and pinion is usually used on plasma cutters
[00:01:41] <jrshaul> Valen: I think the other part of it is needing 96" of travel.
[00:02:11] <Valen> thats fairly long to be sure
[00:02:12] <jrshaul> JT-Shop: Shopbot uses it on their "production-grade" CNC router - it's not meant for metal, but they do seem to work well enough.
[00:02:40] <skunkworks> crap reallocated sectors count keeps increasing. :(
[00:02:50] <JT-Shop> ok a wood router, I thought you meant a mill
[00:02:54] <jrshaul> Nah.
[00:03:10] <jrshaul> It's for a speaker-box-panel-machine.
[00:03:12] <jrshaul> 100% MDF.
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[00:04:13] <Valen> skunkworks: new disk time
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[00:04:35] <jrshaul> Has anyone here CNC'd MDF?
[00:04:52] <Valen> all the time
[00:05:05] <jrshaul> Valen: How fast can you go?
[00:05:08] <Valen> we make test parts out of it
[00:05:13] <Valen> faster than our machine lol
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[00:05:37] <jrshaul> :P
[00:05:51] <jrshaul> I guess a better question is "How many IPM can you do with Machine X?"
[00:06:22] <Valen> the restriction on inches per minute is your tool and RPM as a rule
[00:06:44] <jrshaul> A friend of mine is an out-of-work machinist hoping to start a business, and I'm trying to figure out if custom speaker boxes are viable - there's a lot of very small speaker-making startups, and they need a lot of boxes.
[00:07:22] <Jymmm> jrshaul: For cars?
[00:07:36] <jrshaul> The other major market is twenty-somethings wanting trick subwoofer boxes for their GTIs or Mustangs. Any business dependent on a demographic known for spending $60,000 to upgrade a $6000 car is a good business.
[00:07:42] <jrshaul> Jymmm: Home audio, mostly.
[00:07:48] <jrshaul> Little tiny start-ups show up constantly.
[00:07:58] <jrshaul> Lots of hobbyists, too. Wealthy hobbyists.
[00:08:02] <jrshaul> :D
[00:08:06] <Jymmm> ang go away just as quickly
[00:08:09] <jrshaul> Well, yeah.
[00:08:10] <Valen> if your hacking out MDF then it doesn't really matter what your making it out of ;->
[00:08:19] <jrshaul> Valen: ?
[00:08:24] <Valen> though I'd look into epoxy granite / phenolic basalt
[00:08:26] <Valen> your mill
[00:08:46] <Valen> http://www.cnczone.com/forums/general_metal_working_machines/118358-phenolic_basalt_head_our_hm45.html is a head we made for ours out of the stuff
[00:08:52] <Valen> 24K rpm spindle
[00:08:59] <Jymmm> No, NDF is fine for speaker enclosures, but you need to have an acustic engineering background to get it right
[00:09:00] <jrshaul> That's...well, quite interesting.
[00:09:02] <Jymmm> MDF
[00:09:06] <jrshaul> Jymmm: Nah.
[00:09:16] <jrshaul> All you really need is some MathCAD worksheets.
[00:09:31] <Jymmm> jrshaul: No, not to get it right.
[00:09:36] <jrshaul> No, really.
[00:10:05] <Valen> use a spindle btw not a router
[00:10:12] <jrshaul> Most speaker boxes are limited by cost of production more than anything else - just make it sturdy and brace the bejeezus out of it.
[00:10:41] <Jymmm> jrshaul: No, really. I know a few acoustical engineers and that's all they do. they can "tune" the design of the box by listening to it now.
[00:11:08] <jrshaul> Crossovers are really, really, really difficult.
[00:11:20] <Jymmm> Else, he shuld just import em from china, it be easier
[00:11:33] <Valen> http://www.talkshopbot.com/forum/showthread.php?t=4834
[00:11:48] <jrshaul> But boxes? Boxes aren't very complicated at all - you really just need an Excel spreadsheet.
[00:11:54] <Jymmm> if they just want a box to hold speakers, well there's that.
[00:12:29] <jrshaul> In fact, quite a lot of rather excellent speakers have been designed using Jeff Bagby's "PCD" speaker design suite - which is just a bunch of Visual Basic bits glued together by Excel. It works, too.
[00:12:47] <Jymmm> jrshaul: Have you ever seen/heard Bose 301's or 401's when setup correctly?
[00:12:55] <jrshaul> Yes. They're apalling rubbish.
[00:13:03] <Jymmm> Bullshit.
[00:13:08] <jrshaul> The AES says otherwise.
[00:13:56] <jrshaul> Frequency response, dynamic range, energy storage, harmonic distortion, and polar response - Bose products are generally horrible in all of these areas.
[00:14:23] <Jymmm> Yeah, that's why 901's were the standard for decades.
[00:14:53] <jrshaul> The 301s were sort of neat circia ~1970 when they were first produced, but that was mostly just because it was a clever way to make use of horrible speaker parts.
[00:15:08] <jrshaul> Er, no. That would be B&W.
[00:15:17] <jrshaul> Abbey Road uses 'em.
[00:15:43] <jrshaul> There's also ATC, Tannoy, and many others.
[00:17:39] <jrshaul> Jymmm: Besides, his job is to sell MDF boxes, not complete speakers. Most of what he sells will be used to make absolutely terrible audio equipment - but, since he's being paid, that's not his problem. :D
[00:17:57] <Valen> provided its loud thats all that matters right?
[00:18:34] <jrshaul> Valen: How much does phenolic basalt cost?
[00:18:46] <Valen> around $2 a kg give or take
[00:18:50] <jrshaul> Valen: Also, how many inches per minute can a good spindle like that do, theoretically?
[00:18:56] <jrshaul> $2/kg?!?!
[00:18:57] <jrshaul> Wow!
[00:19:02] <jrshaul> How hard is it to machine?
[00:19:05] <Valen> 400+ if your machine is up to it
[00:19:10] <Valen> you dont machine it, you cast it
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[00:19:30] <JT-Shop> skunkworks: nice video
[00:19:41] <Valen> though for an MDF machine I'd be tempted to go with a concrete base
[00:20:13] <JT-Shop> Valen: that is quite the involved spindle swap
[00:20:27] <JT-Shop> to dampen vibration?
[00:20:38] <Valen> the origional spindle was *crap*
[00:20:51] <Valen> the bearings ran in castings in the head
[00:21:03] <Valen> like actually using the casting as a bearing surface
[00:21:17] <Valen> also for more RPM to use carbide cutters better
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[00:21:41] <jrshaul> Pardon me if I misread the thread - you switched to the linearmotionbearings spindle?
[00:21:56] <jrshaul> Also, AFAIK, that guy sells THK-style bearings - are they any good?
[00:22:18] <Valen> the linear bearings, the round ones?
[00:23:03] <jrshaul> Yah.
[00:23:04] <Valen> yeah we put a linearmotion spindle in
[00:23:23] <Valen> I'd recomend the profile rails from one of the cheap places if you can
[00:23:45] <Valen> the rail is like $80 a meter and the slide blocks are ~$50
[00:23:59] <Valen> but if thats too much yeah use the linearmotion ones
[00:24:07] <jrshaul> Hmm.
[00:24:19] <jrshaul> Any known-good sellers that can do 3-meter rails?
[00:24:21] <jrshaul> :D
[00:24:30] <Valen> nfi I'm in australia
[00:24:38] <jrshaul> Also, have you tried using router bits in your mill?
[00:24:42] <Valen> http://www.vapourforge.com/temp/A3%20%20test%20gantry.jpg is one we hope to make soon that will take both types of rail
[00:24:53] <Valen> we only just did the conversion
[00:25:14] <Valen> and we use the cutters we are going to use on steel/aluminium when we cut mdf
[00:25:27] <jrshaul> Shopbots are something like $20k all up, and while I've done basically zero machining, the fellow assembling this used to be a toolmaker for Texas A&M.
[00:25:27] <Valen> the mdf we cut is normally done to test a tool path
[00:25:36] <jrshaul> Sorry, instrument-maker.
[00:25:48] <Valen> I'd suggest a concrete base, and bolt some slides on
[00:25:58] <Valen> go with a light weight gantry
[00:26:03] <jrshaul> Hmm.
[00:26:12] <jrshaul> Could I have your E-mail, please?
[00:26:32] <jrshaul> That way, I can condense my stupid questions as much as possible so you don't need to spend as much time answering them. :D
[00:26:33] <Valen> just need to get somebody who knows concrete to get a slab that big with no cracks
[00:26:39] <Valen> do it on cnczone
[00:26:46] <Valen> I'm just one idiot, they have thousands
[00:26:48] <jrshaul> Valen: Have you tried the concrete countertop people?
[00:26:51] <JT-Shop> LOL
[00:27:04] <Valen> no, but that'd probably be a good place to start
[00:27:19] <Valen> possibly expensive though and you would want some reo in it
[00:27:20] <jrshaul> I've done a bit of fiddling with concrete, and they have some very impressive stuff - there's a wide series of additives that can produce all sorts of different effects.
[00:27:41] <jrshaul> Also, 2/3 of the cost of what they make seems to be finishing and polishing. Ugly = much cheaper.
[00:28:11] <jrshaul> There's also the possibility of things like fiberglass reinforcement, which does wonders for the strength.
[00:28:46] <Valen> as I said, it'd be worth looking at
[00:29:05] <Valen> you mainly want the mass to keep the machine still whilst throwing the gantry around
[00:29:24] <Valen> I'd think about just using a belt system like a printer rather than a rack and pinion
[00:29:33] <Guest670> hello, I've question regarding emc source code
[00:30:16] <Guest670> may anyone help me?
[00:30:29] <JT-Shop> you simply ask the question
[00:31:39] <Guest670> Actually, I don't know from where shall I start to read. I'm intersting in interpolator
[00:31:50] <jrshaul> Valen: Eh, the rack-and-pinion seems to be awfully successful. Also not too expensive.
[00:33:10] <JT-Shop> Guest670: do you wish to view the source code?
[00:33:41] <jrshaul> valen: I also found this handy kit: http://www.cncrouterparts.com/product_info.php?cPath=21&products_id=50
[00:33:45] <jrshaul> The prices are very reasonable.
[00:33:51] <JT-Shop> if so http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Installing_EMC2#Getting_the_source_with_git
[00:33:59] <Guest670> I can view it from gitweb. But my problem that I got lost in all these files
[00:34:12] <Guest670> I don't know from where i can start.
[00:34:29] <Valen> if your worried about how fast you can go you want servo drive not stepper
[00:34:36] <JT-Shop> that seems to be a common problem
[00:34:36] <Valen> and bigger steppers
[00:34:40] <Guest670> I'm intersting in the interpolator
[00:34:52] <Valen> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?JakeAndRussells is ours
[00:35:01] <Jymmm> Guest670: do you have an actual question?
[00:35:34] <jrshaul> Valen: I'm mostly concerned with cutting speed. As far as I know, there's a practical limit at which the MDF catches fire.
[00:35:45] <Valen> it shouldn't do
[00:35:47] <jrshaul> I suspect a stepper motor could exceed it without too much trouble.
[00:35:50] <Valen> thats why you take a chip
[00:35:59] <JT-Shop> Jymmm: I think he is trying to find something but not sure of what atm
[00:36:00] <Valen> 12 meters per minute is pretty damn fast
[00:36:13] <jrshaul> 12 meters per minute is mind-boggling.
[00:36:13] <Valen> and thats only 8000 RPM
[00:36:16] <jrshaul> !!
[00:36:31] <jrshaul> What sort of cutter are you using?
[00:36:36] <Jymmm> JT-Shop: Sure, but I haven't heard a question yet, just statments.
[00:36:51] <Valen> that was from that post I sent before from somebody using one of those shopbot machines
[00:36:52] <Guest670> Yes. I want to read the source code for the interpolator and I don't know from where I can start. May u help me with that
[00:37:01] <Valen> (11:11:33) Valen: http://www.talkshopbot.com/forum/showthread.php?t=4834
[00:37:21] <JT-Shop> speaking of vibrations I think I'll go find a Vegemite sandwich
[00:37:30] <JT-Shop> what is interpolator?
[00:37:31] <Valen> JT-Shop: good man ;->
[00:37:36] <Jymmm> Guest670: http://git.linuxcnc.org/gitweb
[00:37:47] <JT-Shop> Jymmm: he has been there
[00:38:19] <JT-Shop> Valen: not really we are having shrimp gumbo
[00:38:33] <Valen> :-<
[00:38:35] <Valen> ;-P
[00:38:53] <JT-Shop> http://www.google.com/imgres?imgurl=http://2.bp.blogspot.com/_QgTvnPtrdMY/SvohxHNFv1I/AAAAAAAAE8U/RYp9AuqOKA8/s400/Vegemite.jpg&imgrefurl=http://muskegonpundit.blogspot.com/2009/11/vegemite-contest-draws-protests.html&h=320&w=313&sz=23&tbnid=5bg8OzvNkk9xAM:&tbnh=118&tbnw=115&prev=/images%3Fq%3Dvegemite&zoom=1&q=vegemite&hl=en&usg=__k7oNzHIwlDcbbnNH_fcb_Qy9Y_s=&sa=X&ei=UToyTe_bLI_egQee64S7Cw&ved=0C
[00:38:54] <JT-Shop> EcQ9QEwBg
[00:39:07] <JT-Shop> http://muskegonpundit.blogspot.com/2009/11/vegemite-contest-draws-protests.html
[00:39:31] <JT-Shop> say goodnight Gracie
[00:39:37] <Valen> lol
[00:39:51] <jrshaul> valen: so...8" cutter?
[00:39:56] <jrshaul> Er, 3/8"
[00:40:09] <Valen> ?
[00:40:26] <Guest670> <JT-Shop> Interpolator that generate axis moving points from the G-Code block?
[00:40:56] <Valen> interpreter I think he means
[00:41:30] <Guest670> Not rs274 interpereter
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[00:42:54] <Guest670> I mean the part that is responseblr to generate moving points (postion and speed) for an arc path as an example
[00:44:22] <Guest670> like DDA interpolator
[00:45:20] <Guest670> I don't know if u understand what I mean?
[00:45:35] <Valen> I do now, but its not something I know
[00:45:51] <Valen> you want somebody like PCW
[00:45:59] <Valen> perhaps ask on the mailing list?
[00:45:59] <jthornton> nor do I, but my guess is motion something or other
[00:46:16] <Valen> bbl food
[00:46:48] <skunkworks> jthornton: thanks
[00:47:05] <jthornton> I'd bet you find it in emc2-dev/src/emc/motion
[00:47:10] <Guest670> Ok how can I send to the mailing list
[00:47:49] <jthornton> look in the communications tab of the EMC web page
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[00:55:31] <Guest670> Thank you very mush all. I will try to look in motion first and if couldn't reach I will send to mail list.
[00:56:36] <Guest670> Thnk you jthornton. Thank you JT-shop
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[02:16:45] <elmo_cnc> anyone in minneapolis? just stumbled across this and thought i would share.
[02:16:51] <elmo_cnc> http://www.tcmaker.org/blog/hack-factory/
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[04:54:14] <elmo_cnc> is there an NC viewer for linux similar to NCplot or Cimco ? (other then Axis... something I can edit the text and it will redraw on the fly)
[04:55:19] <toastydeath> not that I have seen
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[04:59:28] <elmo_cnc> oh well.
[04:59:39] <elmo_cnc> alt+tab it looks like...
[04:59:50] <elmo_cnc> thnx
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[05:21:30] <emcrules_> how would one set a max feedrate for an axis
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[06:09:41] <KimK> emcrules_: You mean while still allowing fast rapids? (so can't set a low limit in [axis_n] ini?) Hmm..., not sure about that one. What's your goal?
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[06:17:58] <KimK> !later elmo_cnc (sent via !later) I found gerbv and kicad in Synaptic under "Gerber"; a Gerber photoplotter reads g-code very similar to a CNC machine and may be close enough for your purposes. Hope this helps.
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[10:17:59] <MrSunshine> ahh might get my machine up and running again today! =)
[10:18:18] <MrSunshine> btw, is it posible to have a non X emc running on the cnc computer and run axis on a remote computer?
[10:24:27] <Valen> MrSunshine: I believe so
[10:24:29] <Valen> theres 2 methods
[10:24:44] <Valen> you can run X without actually talking to the graphics hardware
[10:25:05] <Valen> there is also some communications layer that you can run over the network
[10:25:51] <MrSunshine> cause the computer i have doesnt have good graphics acceleration and a bit low on ram to run whole o fubuntu
[10:26:09] <MrSunshine> but as i have linux on all my laptops, hell i could just run axis on them :P
[10:26:23] <MrSunshine> if i can do it by remote to the actual machine running the mill =)
[10:27:49] <Valen> you can do it
[10:27:54] <Valen> whats the machine running it?
[10:29:06] <MrSunshine> its a 1.4ghz but the graphics card sucks ass .. its like a retrofitted laptop with a screen and a small base station =)
[10:29:14] <MrSunshine> s/ass/***/g
[10:29:37] <Valen> you shouldn't need much / any acceleration
[10:29:42] <Valen> most people run VESA drivers
[10:30:15] <MrSunshine> Valen, well small programs work fine, but bigger kinda lags down the whole computer while it tries to render it (sure i can have the DRO screen insted then it works better)
[10:30:33] <MrSunshine> but as ubuntu feels like eating ALL of my ram and more it kinda hurts bigtime to load files etc also
[10:30:33] <Valen> define "big"
[10:30:39] <Valen> how much ram you got?
[10:30:53] <MrSunshine> Valen, just a couple of thousand lines or something and it starts getting realy chunky =)
[10:31:02] <MrSunshine> Valen, hmm, 512 i think it is in that machine atm
[10:31:13] <Valen> that shouldn't be too bad
[10:31:25] <Valen> I have a dual core 1.6Ghz atom with 2G of ram seems ok
[10:31:41] <MrSunshine> Valen, well it is aparently, and realy im blaming ubuntu and gnome, it works ALOT better when i run a non wm mode and start emc from there
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[10:31:58] <MrSunshine> Valen, its the ram that is the problem
[10:32:00] <Valen> axis only gets one core thats shared by the OS, the other core is soley for realtime stuff
[10:32:03] <MrSunshine> 512 doesnt do long in ubuntu :/
[10:32:07] <Valen> where are you?
[10:32:17] <MrSunshine> eh? :P
[10:32:37] <Valen> geographically
[10:32:41] <MrSunshine> sweden
[10:33:21] <Valen> ram should be cheap ;-P
[10:33:31] <Valen> or get one of those dual core mini-itx boards ;->
[10:33:46] <Valen> they are nice
[10:33:53] <MrSunshine> Valen, not the DDR ram :/
[10:33:56] <MrSunshine> DDR2 is
[10:33:57] <Valen> its really handy having axis next to the mill
[10:34:00] <MrSunshine> DDR is to old :P
[10:34:11] <Valen> how many slots do you have?
[10:34:20] <MrSunshine> i think it was only two in it =)
[10:34:32] <MrSunshine> so took the two biggest memories i had laying around
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[10:34:41] <MrSunshine> gonna change computer soon anyways for it
[10:34:53] <Valen> I'll post you 2x 512's if you want
[10:34:56] <MrSunshine> buying a computer today is dirt cheap, hell i get a whole new computer for the same price i buy the RAM for this one for :P
[10:35:16] <Valen> those dual core mini-itx's are around $100Australian ($100 US too)
[10:35:32] <MrSunshine> in sweden that would e $200 then :P
[10:36:49] <Valen> 75 euro at the moment
[10:36:53] <MrSunshine> http://cgi.ebay.com/VIA-EPIA-M10000-1G-MINI-ITX-1GB-Ram-/260719165479?pt=Motherboards&hash=item3cb412c027#ht_500wt_1156 <-- that looks quite nice :P
[10:37:00] <MrSunshine> or
[10:37:05] <MrSunshine> havent looked at the cpu
[10:37:09] <MrSunshine> but it had parport :P
[10:37:11] <MrSunshine> Valen, link ?
[10:37:29] <Valen> thats what $100 is in euro
[10:38:03] <Valen> http://cgi.ebay.com/Brand-New-Intel-D510MO-ATOM-Mini-ITX-HTPC-MB-Free-Ship-/260711317965?pt=Motherboards&hash=item3cb39b01cd#ht_1386wt_1141 is more like what you want
[10:38:42] <MrSunshine> 89$ then with shipping ... and then +25% on that and +3% or so for toll :P
[10:38:57] <Valen> you can probably get it locally to you
[10:39:12] <Valen> worst case computer store should be able to order it in
[10:40:19] <MrSunshine> 710sek .. not that bad
[10:40:32] <MrSunshine> thats including shipping
[10:41:01] <MrSunshine> and has a pci slot for some parport extending :P
[10:41:06] <MrSunshine> Valen, does it include a parport ?
[10:41:16] <Valen> I believe so
[10:41:35] <Valen> though there was a bug in the bios that was causing some issues but I believe that has been worked around
[10:42:43] <MrSunshine> have to see if i can scramble some money for that thing =)
[10:42:58] <MrSunshine> i guess it should end up at like 1500sek as i need to buy memory and hd for it :P
[10:43:06] <MrSunshine> anyways, how is the power supplied to it ?
[10:43:38] <Valen> use existing hdd
[10:43:43] <Valen> I think ATX
[10:43:48] <Valen> just stick it in existing case
[10:43:50] <MrSunshine> Valen, well it doesnt have IDE interface
[10:43:54] <MrSunshine> existing hd is IDE :P
[10:44:07] <Valen> ahh
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[10:44:23] <MrSunshine> only sata i have is in this one
[10:44:28] <MrSunshine> and its not going to be a cnc computer :P
[10:44:35] <MrSunshine> its my compiling computer =)
[10:44:47] <MrSunshine> phenom x4 140W cpu =)
[10:44:52] <MrSunshine> big time number cruncher :P
[10:45:06] <MrSunshine> anyways, have to go now =) thanks for the tip on that mobo =)
[10:47:37] <Valen> take a look on the wiki
[10:47:41] <Valen> the latency test results
[10:47:50] <Valen> should have others to pick from if your interested
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[12:29:40] <elmo40> skunkworks: that drill is a little bent, eh ;)
[12:34:01] <elmo40> KimK: I will have to check gerbv and kicad out. thanks.
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[13:37:42] <jthornton> has anyone seen my soldering iron?
[13:39:24] <Valen> its not on your head
[13:39:54] <jthornton> no, it is in a box marked "soldering iron" :/
[13:41:32] <Valen> cos people loose sunglasses like that all the time
[13:42:01] <jthornton> I thought you were talking about the Faulty Towers episode with Mrs. Richards :)
[13:43:46] <Valen> lol
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[14:00:52] <jthornton> found it in the shop... now to find my strippers
[14:04:45] <dimas_> googllemap them all
[14:07:41] <jthornton> hey that is a good idea
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[14:10:50] <dimas_> :)
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[14:28:47] <skunkworks> elmo40: best enco had. :)
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[16:06:54] <mikegg> what is the difference between a brushless DC and an AC servomotor?
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[16:09:57] <MrSunshine> 1247 for a D510MO, 2gb ram and 160GB hd =)
[16:09:58] <MrSunshine> not bad
[16:10:21] <MrSunshine> (about 188$ aparently :P )
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[17:18:38] <rooks> yeah, i got myself this week d410, theyre dirt cheap and low power :)
[17:20:30] <MrSunshine> ahh finaly got the cnc machine bench up =)
[17:20:37] <MrSunshine> now i can start doing something with the mill again
[17:20:44] <MrSunshine> just need to put the controller cabinet on the wall and im all set =)
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[17:47:14] <pcw_home> mikegg I think brushless DC implies the commutation is done in the motor (like the so called brushless DC fans in your PC)
[17:47:16] <pcw_home> "AC servo motor" is pretty vague, Normally it means a PMSM (Permanent Magnet Synchronous Motor) used as a servo motor.
[17:47:17] <pcw_home> but there are older AC servos (2 phase) I'm old enough to remember those.
[17:54:20] <skunkworks> pcw_home: http://www.youtube.com/watch?v=39q6kvrSBSk
[17:54:27] <skunkworks> your hardware is awesome!
[18:05:07] <bdale> I'm confused .. Axis keeps coming up with max velocity slider showing 7200 in/min as the max end, even though my ini file has no axis with a max velocity above 120 in/min .. ??
[18:05:42] <cradek> ini file units are inches/sec, not inches/min
[18:05:51] <cradek> notice you're off by a factor of 60
[18:05:53] <bdale> oh!
[18:06:08] <bdale> all is clear now!
[18:06:13] <bdale> thanks!
[18:06:16] <cradek> welcome
[18:06:30] <cradek> vels are inch/sec, accels are inch/sec^2
[18:06:35] <bdale> trying to get my homing config nailed down before I re-install the head
[18:06:40] <bdale> yep, got it
[18:06:51] <skunkworks> bdale: pictures!
[18:07:02] <bdale> skunkworks: yeah, yeah, I know .. soon!
[18:07:07] <skunkworks> ;)
[18:07:12] <Tom_itx> that drill bit is crying out for lubricant
[18:08:41] <skunkworks> Tom_itx: yes. it was a dry run :)
[18:08:52] <Tom_itx> very
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[18:13:09] <pcw_home> Thats neat shunkworks! Bur why does the tap look like its starting another cycle at the end, kinda spooky
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[18:13:19] <pcw_home> (but)
[18:15:22] <Tom_L> oops
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[18:16:25] <cradek> pcw_home: on tap retraction, Z stays synched with the backward-running spindle until it starts going forward again. this means at the end of the cycle, Z will be higher than it started. it then rapids back to the original height.
[18:16:47] <skunkworks> pcw_home: that is the tapping cycle. it starts deaccelerating the spindle at the start point - and as my spindle deacellerates slowly - it goes a ways past the start point. then shuttles back to the start point.
[18:16:48] <skunkworks> heh
[18:16:52] <cradek> otherwise, if you did a row of tapped holes, it would get higher and higher on each one
[18:16:53] <skunkworks> what cradek said
[18:17:12] <cradek> it does look weird, but it's on purpose
[18:20:17] <pcw_home> OK I see, just overshoots away from the work but rapids back to the start
[18:20:26] <cradek> yes
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[18:26:04] <bdale> ok, cool .. homing is working to my satisfaction, and all the velocity limits are fixed .. watching it run the silly axis logo g-code file with no head mounted yet
[18:26:43] <bdale> so what are reasonable values for FERROR and friends?
[18:26:56] <Tom_L> put a pencil in it and see if a circle is a circle
[18:28:25] <bdale> on a servo based 3-axis mill with theoretical accuracy of about 0.0002 inches, I'm just looking for a ballpark of what sort of following error might be considered reasonable?
[18:28:49] <cradek> a couple dozen encoder counts
[18:29:06] <bdale> ok
[18:29:34] <cradek> if you can't follow that close, your tuning can probably be improved
[18:30:45] <bdale> I'm sure my tuning needs work .. it's "functional" now, but I'm not proud of it yet
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[18:44:25] <skunkworks> wow - my following error is pretty close to 12 counts
[18:45:44] <Roguish> good day all. has andypugh committed his latest, greatest bldc comp? if so, how can i get (git) it?
[18:47:08] <pcw_home> Not sure I think I maybe the only one who has it other than Andy
[18:48:25] <Roguish> pcw_home: when i add external power to the logic on a daughter board (7i39 example) the voltage goes all the way back in to the pc. I'm not sure if this is good for the pc. your thoughts????
[18:48:45] <Roguish> how about a diode or something....
[18:49:34] <pcw_home> If you have a new enough 5I20 it should have a 5V terminal block (good for 3A or so its got a PTC)
[18:50:40] <pcw_home> Do you need external power? cable should be good for 300 mA or so
[18:50:54] <Roguish> pcw_home: i got a motor to work with bldc_hall3 and want to try out the new bldc. PTC?
[18:51:47] <Roguish> my motor has an encoder and halls, and it seems much happier with more power.
[18:52:15] <Roguish> i hook a small wall wort to the external power terminals.
[18:52:23] <pcw_home> Maybe just app;ie external power to encoder and halls, not 7I39
[18:52:30] <pcw_home> apply
[18:53:12] <Roguish> i could do that, but those pins are just so convenient.
[18:56:23] <pcw_home> Does your 5I20 have the terminal block?
[18:58:08] <Roguish> can't tell, it's upside down in the computer. the white term strip along the top edge?
[18:58:16] <Roguish> 6 pins?
[18:58:52] <pcw_home> No its a green 2 pos screw terminal block close to the bracket
[18:59:34] <Roguish> no
[19:00:17] <pcw_home> You have an oldie...
[19:00:34] <pcw_home> maybe USB power tap
[19:01:40] <Roguish> i don't mind powering the aux on the 7i39, it just lights up the led on the motherboard even when the computer is unplugged.
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[19:11:33] <Farthen> can i connect peripherals that display information about emc to the serial port? if yes how do i configure them?
[19:11:56] <Farthen> so something like a display that shows current positions of the axis?
[19:12:02] <psha> Farthen: it depends on your perepherials
[19:12:14] <Farthen> i would build them myself with an avr
[19:12:24] <psha> write small userspace comp which will poll emc stat and send updated to ttyS
[19:12:35] <psha> it's pretty trivial
[19:12:47] <Farthen> ok, i just wanted to know if it is possible at all
[19:12:54] <psha> surely it's possible
[19:13:07] <psha> it's like gui but sending info to other media then display
[19:17:22] <psha> http://psha.org.ru/tmp/position.py
[19:17:25] <psha> example
[19:19:38] <pcw_home> Roguish: another PC 5V source is disk drive power (be careful of the +12 and ~unlimited current)
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[19:23:36] <pcw_home> Roguish: latest bldc.comp : freeby.mesanet.com/bldc.comp
[19:27:10] <pcw_home> bbl
[19:27:45] <Roguish> thanks.
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[20:28:01] <ries> hello!
[20:28:10] <ries> Is it possible to undo a touch off ?
[20:32:31] <micges> not really
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[20:48:33] <ries> micges: how do you solve the problem of touching off the wrong axis? (human error)
[20:49:41] <psha> ries: retouch? (just guessing)
[20:49:50] <robh__> swear and retouch
[20:49:55] <ries> psha: the problem is 'where'
[20:50:29] <ries> may be for all my projects I should drill a m6 hole... just in case
[20:50:34] <micges> my gui logs all touch off coordinates
[20:50:53] <ries> or.... I can check if it's possible to make a patch to do a 'undo touch' method..
[20:51:04] <ries> micges: is your Axis?
[20:51:06] <ries> +s
[20:51:28] <micges> Axis based gui
[20:52:01] <psha> micges: extended in which direction?
[20:52:59] <micges> it automates most of operator tasks
[20:53:29] <micges> nothing more
[20:53:43] <psha> any new brand controls?
[20:53:57] <psha> i'm asking since i need to know what to add into gladevcp
[20:54:32] <micges> I heavly use list which index is as pin in hal
[20:54:59] <psha> list?
[20:55:11] <psha> you select item there or it's selected via hal pin?
[20:55:21] <micges> both
[20:55:44] <micges> if you click pin have list index
[20:56:07] <micges> and if you change pin list select proper row
[20:57:47] <psha> hm, same pin? IO?
[20:57:57] <micges> of course not in same time
[20:58:19] <micges> on or second type
[20:58:53] <psha> for list -> hal there is already combobox but treeview based one may be good too
[20:58:55] <micges> I mean list that operator selects or list that show to operator some info
[21:06:26] <psha> data into list is loaded from file one start?
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[21:11:13] <micges> here it's hardcoded, but it should be from some file or xml
[21:11:20] <micges> e3m: hi
[21:12:18] <psha> maye you drop me a screenshot if when you have some time?
[21:12:39] <micges> ok, tomorrow
[21:16:05] <e3m> hi
[21:16:48] <psha> thanks
[21:16:54] <psha> and now it's time to sleep
[21:16:56] <psha> bb all
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[21:24:00] <alankilian> Is anyone on who's familiar enough with common-high Opto inputs and trying to drive them with an LS240?
[21:24:50] <alankilian> The LS240 VoH is only 3.4 Volts, so if I use an opto-in of 5 Volts, so I <need> a pullup to +5 on the LS240 output to get the opto to turn off?
[21:26:05] <alankilian> (Drivers are CMD-260s which don;t seem to have data sheets on the Internet.)
[21:26:26] <alankilian> This page http://www.timgoldstein.com/cnc/CMD260FAQ.htm talkas about a 1K resistor, but it's not coear (to me) if they are talking pullup or series resistor.
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[21:35:03] <elmo40> a Feed command isn't necessary after a G00, is it?
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[21:35:27] <micges> elmo40: no
[21:35:29] <elmo40> I have: G00 XY ; G01 X ; XY...
[21:35:42] <elmo40> but I received an error saying 'bad use of a negative'
[21:36:03] <micges> elmo40: pastebin.com gcode and error message
[21:36:35] <elmo40> (I need to specify, it wasn't with EMC... I used Axis to make the gcode out of an image and used it on the mill at work, Fanuc 18i controller)
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[21:44:51] <elmo40> http://paste.pocoo.org/show/321799/
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[21:54:48] <micges> elmo40: so this is error from emc, right?
[21:55:29] <elmo40> the code came from EMC
[21:55:47] <elmo40> but no, it is on my fanuc... just didn't expect a missing F to cause problems
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[21:57:45] <micges> oh ok
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[22:52:38] <elmo40> my part :) http://imagebin.org/132961
[22:52:51] <elmo40> simple, mind you.
[22:53:35] <elmo40> I used the imagemajik gcode tool
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[22:54:06] <Valen> needs a smaller segment size :-<
[22:54:14] <elmo40> rather confused. it made arcs on some of the straights and G01 on all the places where there should be an arc :P
[22:54:21] <Valen> what feed and speeds you using?
[22:54:59] <elmo40> 40IPM with a 1/2" 100deg chamfer mill @ 5500RPM
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[22:55:36] <elmo40> the first one was too deep. I adjusted for the second one (in the back)
[22:56:34] <elmo40> I tried 100IPM but it was very ragged looking.
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[22:59:03] <Valen> I think we have a 45 degree V bit and we have been snapping the tips off :-<
[23:00:29] <elmo40> on what material?
[23:01:14] <Valen> al
[23:04:55] <tom3p> elmo40, hello, what is the "imagemajik gcode tool"? graster?
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[23:07:46] <elmo40> nope
[23:08:01] <elmo40> http://www.cnc-club.ru/forum/viewtopic.php?f=33&t=35&start=0
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[23:12:37] <tom3p> ok, inkscape & Gcodetools, thx
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[23:30:59] <frallzor> hoy hoy
[23:31:28] <JT-Shop> hi hi
[23:31:50] <frallzor> so whats happening in here today? =)
[23:32:09] <JT-Shop> framing up my shop addition
[23:32:24] <frallzor> fun? =)
[23:38:17] <JT-Shop> yep party at my house next weekend BYOH
[23:40:51] <frallzor> =)
[23:41:06] <frallzor> BYO I get but the H?
[23:41:17] <frallzor> hoochies? :P
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[23:42:59] <frallzoran> I hate internet!
[23:44:22] <JT-Shop> Hammer
[23:44:34] <frallzoran> oh =(
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[23:47:22] <JT-Shop> if you don't have a hammer I will lend you one of mine :P
[23:47:34] frallzoran is now known as frallzor
[23:47:40] <frallzor> lend me some inspiration
[23:47:50] <frallzor> what to do with 10, 15 and 20mm Al
[23:50:12] <JT-Shop> hmm, well that is too thin for puck savers
[23:52:36] <JT-Shop> large sheets? or just bits?
[23:53:09] <frallzor> "strips"
[23:53:28] <frallzor> 10x100x1000 15x100x1000 20x120x500
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[23:57:10] <Valen> whats a puck saver?
[23:58:54] <JT-Shop> http://smokeandstuff.com/index.php/products/lightweight-puck-saver
[23:58:59] <Valen> whats it do?
[23:59:41] <JT-Shop> push the wood bisquettes off of the smoke generator