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[01:15:50] <emcrules_laptop> Has anyone used emc to control a cnc punch press?
[01:30:32] <JT-Shop> I think so
[01:31:09] <JT-Shop> cnc wire bender, robot, machines of all kinds
[01:32:32] <emcrules_laptop> I would think it wouldn't be that hard. Just wondered if it has been done. One of my coustomers just picked up an old Amada tought it might make a good canidate for a retro one day
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[01:42:34] <kilian1> I'm so excited. I just got my second CNC machine going using Linux CNC and it's a beauty.
[01:43:12] <kilian1> It's an old "Dental Mill" and can do 4.25"x4.25"x1.25" at 25,000 steps-per-inch.
[01:47:58] <emcrules_laptop> congrats
[01:50:46] <kilian1> Configuring Home and Limits was quite a brain twister since it's got 1 pin for all (+) and (-) limits, and 3 pins that are really the (-) limits used for home.
[01:51:01] <kilian1> The Wiki was excellent, but still a twister to get it configured right.
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[02:55:55] <skunkworks> kilian1: we require videos!
[02:59:39] <cradek> 'dental mill' sounds awfully nice
[03:00:07] <kilian1> Well....... It seems to be dropping steps and I hit a limit after about 15 minutes of milling using image-to-gcode and a 0.003" diameter tool.
[03:00:13] <cradek> sounds like a very useful work volume
[03:00:14] <skunkworks> yes - I hear circuit board mill
[03:00:25] <kilian1> So, out comes the 'scope to see what's going on in the driver board I inherited.
[03:00:47] <cradek> losing a single step here and there, or losing a bunch of position at once?
[03:01:20] <kilian1> I can't tell. Just that I het axis-0 limit after about 20 passes back and forth on the scan.
[03:01:36] <cradek> huh
[03:02:37] <kilian1> I have HOME_LOCATION set to 0.1 Inch, and at 25,000 steps-per-inch, that's 2500 steps, so it's dropping a lot.
[03:03:13] <skunkworks> are you getting any rtai errors?
[03:03:19] <kilian1> The guy warned me his LPT-to-stepper interface board was a little crude and he couldn't go very fast, so I bet there's something wonky in there.
[03:03:26] <kilian1> No rtai errors.
[03:03:30] <skunkworks> good
[03:04:39] <kilian1> I did set maximum jitter to 27,000 so that's a lot. I only see around 11,000 when I'm testing though.
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[03:32:29] <kilian1> Scope traces looked fine. Slowing down to 1/10th speed. ... Is...... B...o...r..i...n...g........... But we'll see if I hit a limit or not.
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[03:59:54] <elmo40> emcrules_: you know anyone with a reprap?
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[04:27:14] <bdale> I do
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[04:44:15] <elmo40> in Ontario?
[04:44:59] <elmo40> a friend of mine has a Maximat V10 that he was wondering if it is a candidate for a CNC conversion
http://www.lathes.co.uk/emco/page4.html
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[07:01:55] <MattyMatt> elmo40: they are ALL candidates :)
[07:02:18] <MattyMatt> that one has plenty of flat surfaces to mount the motors
[07:03:23] <MattyMatt> and the gearbox removes, so you could make the conversion reversible, if you ever want to
[07:05:04] <MattyMatt> that seems to be the trickiest part of any conversion I've thought about, preserving manual operation
[07:06:28] <MattyMatt> the best ones I've seen have a pulley behind the manual handle with the motor tucked away underneath or sth
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[14:48:11] <JT-Shop> YEA! the trusses arrived... :/ it feels like -1F outside even in the sun
[14:49:14] <skunkworks> heh
[14:52:36] <Jymmm> JT-Shop: What have you been building?
[14:52:55] <Jymmm> and dont say a building
[14:53:14] <JT-Shop> a building
[14:53:17] <awallin> walls around the concrete floor ?
[14:53:24] <JT-Shop> 3 walls yes
[14:53:54] <JT-Shop> http://s47.photobucket.com/albums/f163/johnplctech/Shop%20Addition/
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[14:54:51] <Jymmm> JT-Shop: Is that untreated OSB ?!
[14:55:36] <JT-Shop> I treat it with care :)
[14:55:46] <JT-Shop> untreated?
[14:55:48] <Jymmm> careLESS maybe
[14:55:55] <Jymmm> no paint, no nothing
[14:56:15] <JT-Shop> yea, been meaning to get around to putting up siding
[14:56:36] <Jymmm> for how long?
[14:56:48] <JT-Shop> since I built the garage
[14:56:57] <Jymmm> which was?
[14:57:02] <JT-Shop> I forget
[14:57:15] <JT-Shop> the garage is 80% concrete walls
[14:57:31] <Jymmm> how many years ago?
[14:57:49] <JT-Shop> 5-6 heck I don't know
[14:58:00] <Jymmm> lol
[14:58:14] <Jymmm> I'm surprised it lasted that long
[14:58:33] <JT-Shop> yea, me too
[14:59:05] <Jymmm> the new wall is 16" on center?
[14:59:34] <JT-Shop> mostly
[14:59:57] <Jymmm> 23ft?
[15:00:24] <Jymmm> err 29 ft?
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[15:10:50] <JT-Shop> 30 x 32
[15:12:09] <Jymmm> cool, is that big enough?
[15:14:18] <Jymmm> Has anyone played with nitrogen gas?
[15:14:36] <cradek> I've breathed quite a lot of it
[15:14:42] <skunkworks> heh
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[15:14:47] <Jymmm> heh
[15:15:02] <cradek> I also like to swim through it
[15:15:17] <JT-Shop> Jymmm: no
[15:15:27] <Jymmm> If you flooded a compartment with nitrogen, does it leave condensation?
[15:15:31] <skunkworks> we have a tank to refill our hydraulic accumulators. plus our laser uses nitrogen. iirc (helium, nitrogen and co2)
[15:15:54] <JT-Shop> wet or dry nitrogen?
[15:16:08] <Jymmm> nitrogen gas
[15:16:18] <skunkworks> what would be the condensate? liqid nitrogen? ;)
[15:16:32] <Jymmm> relative humidity
[15:18:08] <Jymmm> I'm considering adding a fire supression to my laser; just dont want to damage the electronics
[15:18:28] <atmega> 98% n2 has a dew point around -100F
[15:18:47] <Jymmm> atmega: say that again in dumbass speak
[15:19:14] <Jymmm> JT-Shop: is there really such a thing as dry n2?
[15:19:23] <atmega> if you can actually purge the compartment and keep it sufficiently N2 only, there will be no condensation.
[15:20:41] <Jymmm> atmega: is that at the time of dispensing the n2, or after the fact?
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[15:21:34] <atmega> if you start with pure N2 only and keep it N2 only
[15:22:27] <Jymmm> atmega: Well, the idea is to put out the fire, and displace all O2 within a few seconds.
[15:22:48] <atmega> put out the fire with what?
[15:23:02] <Jymmm> N2
[15:23:28] <Jymmm> No O2 == No Fire
[15:23:38] <atmega> heh, in some worlds, that might be true
[15:23:51] <atmega> ever seen a zirc or magnesium fire?
[15:23:56] <nullie> it's how it works in datacenter
[15:24:04] <nullie> s
[15:24:12] <Jymmm> atmega: Were not talking a Class D fire here
[15:25:08] <atmega> if you could dump enough helium, and have it flow enough to really purge the area, it would probably prevent condensation from normal conditions
[15:25:14] <atmega> s/helium/nitrogen/
[15:26:25] <Jymmm> atmega:
http://www.bfrl.nist.gov/866/HOTWC/HOTWC2006/pubs/R0000296.pdf
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[15:28:23] <Jymmm> I just need a temp sensor/switch now
[15:28:26] <L84Supper> http://www2.dupont.com/FE/en_US/products/FM200.html
[15:28:47] <Jymmm> L84Supper: Go look at the cost =)
[15:28:59] <Jymmm> FM200 is a "clean" replacement for Halon.
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[15:29:24] <L84Supper> how can you put a price on your safety ;p
[15:30:00] <Jymmm> If I can't afford the thing in the first place, dont do much good now does it =)
[15:31:33] <Jymmm> L84Supper: 5lb extinguisher rated at 5BC is $190
[15:31:55] <Jymmm> utilizing Halotron I
[15:32:20] <Jymmm> 11lb $355, 15lb $500
[15:32:43] <L84Supper> funny how Dupont always manages to patent a popular freon, halogen etc.... then right when the patent expires there is federal legislation that puts a high tax on and bans it's new production
[15:33:00] <Jymmm> lol
[15:33:24] <L84Supper> then Dupont has the new replacement that they just patented
[15:33:40] <Jymmm> oh thats funny
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[15:36:54] <Jymmm> L84Supper: you sould write up an article and publish it in newspapers
[15:38:19] <L84Supper> sounds like a job for wikileaks
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[16:19:44] <Paragon39> Hello All, Hope I find you all well! What is a nice material to turn such as perspex acetal nylon any other?
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[16:24:09] <awallin> pvc?
[16:24:12] <awallin> define nice.
[16:24:18] <Jymmm> Ewwwwwwwwwwwwwwwwwwwwwwwwwww
[16:24:34] <Jymmm> acrylic
[16:25:06] <Jymmm> cast acrylic specifically, not extruded acrylic
[16:27:53] <Paragon39> Thanks Chaps... By nice I mean the way it cuts some plastics grap the tool ie there more sticky while other will leave a nice finish.
[16:29:00] <Paragon39> Some maybe brittle also I guess. I have never attempted to turn anything other than metal on my lathes.
[16:30:16] <JT-Shop> delrin is my favorite
[16:31:14] <awallin> teflon/ptfe is probably too soft ?
[16:31:17] <Paragon39> JT-Shop: I was just looking at some delrin on ebay.
[16:32:01] <Paragon39> Would nylon be to soft and stringy (for a better word)?
[16:32:02] <awallin> delrin aka pom aka acetal...
[16:32:05] <JT-Shop> teflon is not too bad with plastics you need to use a dead sharp aluminum insert if the dimension is critical
[16:33:19] <Jymmm> acetal != delrin, but close
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[16:33:46] <Paragon39> That was the next question I was going to ask.. Tooling! Does delrin cut fine with standard lathe tooling?
[16:33:52] <JT-Shop> delrin is acetal
[16:33:54] <awallin> http://en.wikipedia.org/wiki/Delrin
[16:34:03] <JT-Shop> but there are different acetals
[16:34:23] <JT-Shop> http://www.mcmaster.com/#plastics/=ak59tx
[16:34:48] <Paragon39> anyone tried polyproplene?
[16:37:01] <JT-Shop> I usually use delrin, or polyethylene UHMW or VHMW
[16:37:29] <Jymmm> # Copolymer acetal is preferred to Delrin where centerline porosity is concerned.
[16:39:11] <Paragon39> I think delrin will do the trick I need to cut recesses to take some copper windings for a project im playing with. Thanks Guys!
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[17:07:06] <JT-Shop> Jymmm: you busy?
[17:07:17] <Jymmm> JT-Shop: whats up?
[17:07:45] <JT-Shop> come over and help me lift this wall up over the water pipe stub out :)
[17:08:32] <Jymmm> JT-Shop: Sure, just warm up the tractor to 76F in the cab and I'll be right over.
[17:09:14] <JT-Shop> the tractor will be that warm in April I think for a hour or two
[17:09:45] <Jymmm> JT-Shop: No problem, I'll be there in June =)
[17:13:11] <Jymmm> JT-Shop: Um, why dont you use the tractor to lift the wall?
[17:13:37] <JT-Shop> I'm by myself
[17:13:59] <Jymmm> JT-Shop: Just get the dog to align the wall, while you lift it with the tractor
[17:14:22] <JT-Shop> she is pretty smart, I'll go discuss it with her
[17:14:46] <Jymmm> JT-Shop: bribary helps too,
[17:15:21] <atmega> she can tell teh difference between a circle and an ellipse, real close.
[17:15:48] <Jymmm> JT-Shop: just tie a rope around her neck and to the wall, place the juice steak at just the right distance/angle the wall needs to be and then tell her to get the steak!
[17:15:57] <Jymmm> s/juice/juicy/
[17:16:13] <JT-Shop> she won't fall for that trick, she is too smart
[17:16:28] <Jymmm> It's steak, yeah she will =)
[17:16:46] <Jymmm> you actually have to let her HAVE the steak too.
[17:17:47] * JT-Shop debates with the dog... to go to town and get a T for the air line and actually do some work today or not
[17:18:23] <Jymmm> get the tee, get a nap, get to work!
[17:18:39] <JT-Shop> I like that plan
[17:19:30] <Jymmm> thought you would, thus why it was custom tailored to your specifications.
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[18:42:40] <skunkworks> anyone going to cabin fever?
[18:42:46] * skunkworks is not
[18:43:40] <atmega> sounds cold
[18:43:57] <atmega> I'm going to Savannah, GA for late xmas
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[19:17:09] <Guest338> camview-emc
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[19:20:30] <psha> :)
[19:21:15] <andypugh> Odd thing to pop in and say
[19:23:40] <psha> and then leave in same minute :)
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[19:27:20] <skunkworks> I do that all the time. irc turrets
[19:27:59] <skunkworks> servo! closed loop! open source! ^%$$%@^!
[19:28:49] <psha> that's not same
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[19:29:37] <demonstrate> servo! closed loop! open source! ^%$$%@^!
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[19:30:07] <cradek> you guys are weird
[19:30:42] <skunkworks> :)
[19:31:18] <Jymmm> s/weird/under the influence of a controlled substance/
[19:32:25] <atmega> or not controlled enough
[19:33:49] <Jymmm> their smoking salvia?
[19:35:05] <Jymmm> Does anyone know of cement board (used to mount tiles on) is fire proof?
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[19:42:09] <andypugh> Define "Fire Proof"
[19:42:51] <andypugh> Ordinary wallboard is a bit fireproof, and then is more fireproof double-layered with staggered joints.
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[19:43:17] <andypugh> So, for example, over a garage you are meant to go doubled and staggered.
[19:43:41] <Jymmm> ignited material for more than 10 minutes
[19:43:55] <Jymmm> make it 5 minutes
[19:44:02] <andypugh> The waterproof cement based stuff (the green stuff?) would be at least as good, and almost certainly better.
[19:44:22] <andypugh> It won't ever burn. It might crack and let the fire through.
[19:45:10] <Jymmm> I need to build a fireproof box around 2x3x4 feet and set a fire in it. The fire/heat can't escape the box
[19:45:25] <andypugh> I guess the answer depends on if you are asking from a "can I burn a barbecue on it" or "will this get through building/planning control"
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[19:46:18] <Jymmm> No, it's to replicate the size of my laser and to start a small fire and measure the temperature and time
[19:46:54] <andypugh> You will be watching it with a bucket of water?
[19:47:03] <Jymmm> nope, hose =)
[19:47:42] <andypugh> If so, then I reckon it ought to be OK, but I would be tempted to go with two layers with glass fibre or chicken wire between them.
[19:47:47] <Jymmm> What I'm really doing is determining what temperatures are present specifically in the corners.
[19:48:16] <andypugh> Or do it on a surface that can stand a fire, like the lawn.
[19:48:37] <Jymmm> It has to be enclosed so I can measure the corners
[19:48:46] <andypugh> I think that the kitchen table would be a bad place for the experiment.
[19:48:53] <Jymmm> ya think?
[19:49:02] <andypugh> Your choice, of course.
[19:49:18] <Jymmm> I need to determine if 155F is "hot enough" in the corners
[19:49:40] <Jymmm> before real damage occures
[19:49:49] <andypugh> That's barely warm?
[19:50:19] <Jymmm> Well, that's the lowest temp fire sprikler I've been able to find so far.
[19:50:26] <Jymmm> sprinkler
[19:50:29] <Jymmm> head
[19:50:43] <Jymmm> I think 175F may be too hot.
[19:51:10] <Jymmm> there is a blower attached to the laser, so that is going to reduce the temp as well.
[19:52:59] <andypugh> Ah, I see.
[19:54:01] <Jymmm> so, even 155F may be too high. it really all depends if the corners are isolated from the blower during a fire.
[19:54:19] <Jymmm> the blower exhausts fumes/smoke
[19:55:04] <Jymmm> This is rated at 175F
http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?productId=96210&catalogId=10001&langId=-1&storeId=11151&storeNum=10107&subdeptNum=10562&classNum=10564
[19:55:49] <Jymmm> But they say that the engine compart is usually around 140F normally
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[20:12:51] <JT-Shop> wow 2600 members on the forum
[20:13:38] <skunkworks> nice!
[20:14:02] <skunkworks> cradek: so far - no issues with locking rotories - thanks again for the addition
[20:14:45] <cradek> yay
[20:15:00] <cradek> I thought you had a little problem, but I don't remember what it was
[20:15:51] <skunkworks> there is a little issue that G0 needs to be given for each command.. Like g0x10 -> b180 doesn't work. not a big deal though
[20:16:21] <cradek> oh right - what's it do if you do that?
[20:17:03] <skunkworks> I don't remember exaclty - it pops up an error something about g0 being needed maybe ...
[20:17:22] <cradek> YOU FORGOT TO TYPE G0 DUH [x]
[20:17:23] <skunkworks> I would have to try it again
[20:17:39] <cradek> I guess it's a bug
[20:18:46] <skunkworks> It is funny how I though forcing homing was a pain. but know that I have this machine almost setup - that is how it needs to be. :)
[20:18:50] <skunkworks> Thought
[20:19:03] <skunkworks> boy
[20:19:12] <cradek> what do you mean forcing homing?
[20:19:16] <skunkworks> *now
[20:19:19] <cradek> oh
[20:19:23] <cradek> before you can mdi
[20:19:26] <skunkworks> before you can do anything - you have to home.
[20:19:32] <cradek> yeah, homing is good
[20:19:35] <skunkworks> yes
[20:20:19] <JT-Shop> I like the option to not force homing when your setting up a machine, but want forced homing once the machine is in operation
[20:20:26] <skunkworks> I have it turned off right now because of testing - bit it will get turned on pretty quick
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[20:20:37] <skunkworks> exactly :)
[20:20:45] <skunkworks> *but
[20:21:22] <skunkworks> on a related note - the overtravel switches seem to work great!
[20:21:47] <JT-Shop> that's nice to have
[20:21:54] <skunkworks> makes you jump when you do something wrong and 'bang' everything shuts off.
[20:22:06] <cradek> I would like max velocity (for everything) to be quite limited before homing
[20:22:19] <skunkworks> I could see that/.
[20:22:43] <skunkworks> I have been testing tool changing and such. If I forget to home - it will go into overtravel limits.
[20:23:08] <cradek> yeah, that rapid to (what it thinks is) tool change position is a killer
[20:23:48] <skunkworks> heh - so far - the limit switches seem to be all far enough away from the hardstops. :)
[20:24:52] <skunkworks> I also have the f-error on all axis at .002 so far with no errors.
[20:25:19] <skunkworks> it really seems to be coming togather.
[20:26:03] <skunkworks> I hope to hack the tool chain ladder so it will search for tools while running. Then I will make a video of everthing working together.
[20:26:31] <cradek> meh, you should fix iocontrol instead
[20:27:06] <skunkworks> I wish
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[20:27:58] <skunkworks> I also want to play with the acc/dec of the vfd
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[20:29:30] <JT-Shop> get rigid tapping up to 1000 RPM
[20:29:31] <skunkworks> although I just finally made my first web page using php, mysql, html and javascript to enter data ;) yay :)
[20:29:48] <skunkworks> only took 2 days of fumbling
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[20:40:23] <JT-Shop> I can now have two temporary air lines connected to the air compressor at once so I can run both machines at the same time
[20:40:31] * JT-Shop is no longer a one air hose shop
[20:41:52] <JT-Shop> now to go cut the corner of the roof off
[20:47:59] <atmega> anyone have the grizzly coupon code from teh Jan. Woodworkers Journal?
[20:50:38] <skunkworks> JT-Shop: 1000rpm? I would be happy with sane acc/dec at <500rpm
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[21:05:10] <JT-Shop> skunkworks: I could not resist :)
[21:05:38] <skunkworks> :)
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[21:48:47] <psha> bb all
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[22:47:30] <andypugh> I am thinking about the counterbalance for my milling machine knee. Can anyone think of a good reason why the counterbalance cylinder couldn't push up on the underside of the leadscrew?
[22:47:57] <andypugh> (It's a vertical screw that screws down into the machine base)
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[23:05:10] <JT-Shop> against the leadscrew or the knee
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