#emc | Logs for 2011-06-01

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[00:11:01] <jdhNC> anyone know if you feed an arduinio 9v externally, do you still get the 3.3v from the ftdi chip?
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[00:23:46] <Tom_itx> what sort of regulator does it have?
[00:23:57] <Tom_itx> the 3.3v may come from the usb vbus
[00:24:09] <Tom_itx> regulated down inside the ftdi
[00:24:12] <jdhNC> the 3.3 comes from teh ftdi
[00:24:27] <jdhNC> but, I want to power it from a 9v wall wart
[00:24:57] <Tom_itx> ck the schematic, they're freely available
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[00:26:00] <Tom_itx> which one is it?
[00:26:24] <jdhNC> diecemilla or something like that
[00:26:44] <jdhNC> I got a bluetooth module for it, but it only does 3.3v
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[00:29:16] <Tom_itx> it looks like it would be 5v regulated out to me
[00:29:41] <Tom_itx> i'm looking at the Diecimila ref design
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[00:30:37] <Tom_itx> there's a jumper for usbvcc or vcc
[00:30:43] <Tom_itx> vcc goes to a 5v regulator
[00:30:56] <jdhNC> so, no 3.3 without powering via usb
[00:31:16] <Tom_itx> i'm not sure what IC4 is
[00:31:19] <Tom_itx> it's variable
[00:31:34] <Tom_itx> IC5 is a 5v reg
[00:31:42] <Tom_itx> not sure what they're doing there
[00:32:29] <Tom_itx> does the ftdi power it at 3.3v?
[00:35:19] <Tom_itx> the bluetooth isn't 5v tolerant?
[00:35:38] <jdhNC> no
[00:36:00] <jdhNC> needs 3.3vcc and tx/rx are 3.3 only
[00:36:24] <jdhNC> it was cheap though so I could get a different one.
[00:36:36] <jdhNC> 3.3v would make my external ADC's a little better
[00:36:51] <Tom_itx> you could do several things
[00:37:00] <Tom_itx> swap out the 5v reg for a 3.3v one
[00:37:11] <Tom_itx> use a translator chip between the bluetooth
[00:37:16] <Tom_itx> and run it at 3.3v
[00:37:30] <jdhNC> I also need 5v for a pressure sensor
[00:37:38] <Tom_itx> use a resistor divider on the data lines
[00:38:09] <Tom_itx> i'd ask in #avr, i'm pretty sure several there are messin with bluetooth
[00:38:18] <jdhNC> the bt docs show 2 transistors for the rx line, single resistor for tx
[00:38:50] <jdhNC> not sure why they have two... inversion maybe
[00:38:58] <jdhNC> http://www.sure-electronics.net/download/GP-GC021_Ver1.0_EN.pdf
[00:39:05] <Tom_itx> the resistor is probably for current limit to the rx in pin
[00:40:04] <Tom_itx> i'm sure you'd get help in avr
[00:40:11] <Tom_itx> i've not messed with bluetooth
[00:40:16] <Tom_itx> i know abcminiuser has
[00:40:19] <Tom_itx> and a few others
[00:40:36] <Tom_itx> he wrote lufa and has a bluetooth working with it i'm pretty sure
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[00:41:17] <jdhNC> I'm a week or so from there still
[00:41:35] <jdhNC> or a month if I get around to tramming/wtf my router enough to make a board
[00:41:53] <jdhNC> few days to relearn eagle
[00:42:04] <Tom_itx> well there's plenty of help over there if you get stuck
[00:43:05] <Tom_itx> max supply v 4.2v
[00:43:36] <SWPadnos> page 6 (9 of the PDF) shows a transistor based level shifter for use with 5V microcontrollers
[00:43:53] <jdhNC> yeah, why 2?
[00:44:00] <SWPadnos> so it's non-inverting
[00:44:32] <Tom_itx> one would invert the signal no?
[00:44:33] <SWPadnos> I don't know that you can tell the UART in the AVR to invert its input (and a start bit is always a 0)
[00:45:10] <jdhNC> I don't know what you mean by that
[00:45:28] <SWPadnos> serial data has a start bit, some data bits, and some stop bits
[00:45:40] <SWPadnos> the start bit is always a 0, stop bit(s) are always 1
[00:46:00] <jdhNC> that part I know
[00:46:22] <Tom_itx> you can do that with mosfets too
[00:46:31] <Tom_itx> i use a nice little chip for it on my programmer
[00:46:34] <SWPadnos> the UART (that's the serial port) in the AVR chips may not be able to invert the input pin, which means that the signal presented to the AVR chip has to have "0" start bits and "1" stop bit(s)
[00:46:40] <Tom_itx> it works down to ~1v
[00:47:01] <Tom_itx> i've programmed avr's down to 1.75v
[00:47:20] <SWPadnos> which means that the bluetooth "modem" either needs to be able to invert its output, or you need two transistor/resistor sets, so that the signal presented to the AVR is the same as the signal output by the module
[00:47:34] <SWPadnos> ie, it's inverted twice, which means that it's the same as the original
[00:47:44] <jdhNC> I have some unbuilt RBBB *inos', I could build one as a 3.3v
[00:48:09] <jdhNC> but, I still need 5v for the pressure sensor
[00:50:04] <SWPadnos> and USB, if you want to be able to talk to it
[00:50:21] <SWPadnos> (though USB signaling is at 3.3V, I believe)
[00:50:24] <Tom_itx> http://ca.mouser.com/ProductDetail/NXP-Semiconductors/GTL2002DP118/?qs=sGAEpiMZZMsty6Jaj0%252bBBr%252ba7pY41EA16CnqyfpH0m4%3d
[00:50:32] <Tom_itx> there's a 2 bit level translator
[00:50:41] <Tom_itx> i use it's 8bit cousin
[00:51:06] <Tom_itx> i doubt you could get 2 transistors and glue for .41
[00:51:31] <Tom_itx> set 2 voltages
[00:51:35] <Tom_itx> input and output
[00:51:45] <Tom_itx> the outputs follow
[00:51:56] <Tom_itx> bidirectional with no direction pin
[00:51:57] <jdhNC> maybe I'll put BT off for rev2
[00:52:15] <Tom_itx> max ic makes one too but it sucks
[00:52:49] <Tom_itx> then you can run your bt at 3.3v and not worry about it
[00:53:12] <Tom_itx> there's dozens of 3.3v regs out there
[00:53:45] <jdhNC> maybe I can just power it via USB with a wallwart-USB, that will get me 5 & 3.3
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[00:54:09] <Tom_itx> how do you figure?
[00:54:30] <jdhNC> the ftdi has a 3.3v output
[00:54:50] <Tom_itx> enough to run the bt?
[00:55:27] <Tom_itx> i've never messed with the ftdi chips
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[00:55:53] <jdhNC> maybe not, bt needs 10mA, the 3 ADC's will need some also
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[00:57:02] <Tom_L> TPS79333DBVR
[00:57:08] <Tom_L> is one 3.3v
[00:58:31] <Tom_L> MCP1825S-3302E/DB
[00:58:37] <Tom_L> 500ma iirc
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[01:00:04] <Tom_L> http://www.mouser.com/ProductDetail/Microchip/MCP1825S-3302E-DB/?qs=gsqZ4L1luKoZerS%252bYohoGg%3d%3d
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[01:00:19] <Tom_L> max input 6v so you could hook it to vbus or the regulated 5v supply
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[01:05:49] <jdhNC> I hooked the arduinio up to a 7.5vdc wall wart, put the jumper on external, and still get teh 3.3v
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[01:17:50] <jdhNC> this bluetooth module has semicircles for terminals. Is that normal? what is the proper method of connecting to them?
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[01:22:53] <Tom_L> what do you mean?
[01:23:03] <Tom_L> surface mount pads?
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[01:23:13] <Tom_L> that's probably what is intended
[01:24:01] <jdhNC> I guess, they wouldn't be flush with anything though
[01:24:17] <Tom_L> oh
[01:24:22] <Tom_L> i'm not sure then
[01:24:36] <jdhNC> pic is on page 4 of the above pdf
[01:24:49] <Tom_L> i closed it
[01:25:03] <jdhNC> http://www.sure-electronics.net/download/GP-GC021_Ver1.0_EN.pdf
[01:25:48] <jdhNC> they are 1mm pads, 1.5mm pitch
[01:26:03] <Tom_L> hard tellin
[01:26:34] <jdhNC> perhaps I should have gotten the $25 ones instead of the $18
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[01:27:05] <Tom_L> meh, you'll get it
[01:27:18] <Tom_L> i'd find some 1.5mm pin headers and solder them to a carrier board
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[01:27:38] <Tom_L> you know... the one you're designing with the 3.3v reg and level translator..
[01:28:08] <jdhNC> yeah... I have a 4x20 lcd that it really sufficient
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[01:41:44] <jcizek> Hi all, Can anyone tell me.. if you start a HAL meter and are watching a "PIN" and that pin is a parport pin, is that supposed to be the actual hardware level?
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[01:53:26] <jdhNC> I would say yes
[01:54:08] <jcizek> so then I am very confused :)
[01:54:28] <jcizek> My plasma torch on signal is connected to parport.1.pin-01-out
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[01:54:55] <jcizek> if i watch that signal on one config (working config) the torch actually fires and I see in HAL meter it changed from FALSE to TRUE
[01:55:25] <jdhNC> I haven't actually used hal-meter much, but halscope does that and I assume they are showing teh same thing
[01:55:26] <jcizek> in the other config, watchign the sam HAL pin on the meter, it also changes FALSE to TRUE, but i get no output on the paraport
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[01:55:59] <jcizek> ya, scope just gives you an OSCOPE version.. meter is more like a logic probe
[01:56:27] <jdhNC> sounds like you have a problem with the second config
[01:56:31] <jcizek> but i don't understand why the par port is changing state for one config, and not the other when meter shows the raw pin changing in both configs!
[01:57:12] <jdhNC> same parport?
[01:57:20] <jcizek> same parport, same pin
[02:08:04] <jcizek> just setup hal scope to double check... same result. Both configs show a successfull state change on parport.1.pin-01-out
[02:08:16] <jcizek> but only one *actually* changes the hardware
[02:08:23] <jdhNC> so, what's different.
[02:12:15] <jcizek> just went back and looked... a little confused because there is a HAL pin connection for the torch start in BOTH my main .hal file and the compiled in THC module... admittedly they are both connecting the same signals, but i'll try removing one and see if it makes a difference
[02:12:53] <SWPadnos> there should be no actual I/O in the THC module, unless it replaces the parport driver
[02:13:54] <jcizek> well this is a thc comp that JT-Shop wrote
[02:14:08] <SWPadnos> is it from the wiki?
[02:14:24] <jcizek> don't know for sure... got it straight from John
[02:14:33] <SWPadnos> ok
[02:15:12] <jcizek> im double checking his original configs now to see what's different from mine
[02:16:13] <jcizek> yep, his configs have the HAL link in both the HAL file, and the COMP file
[02:16:32] <jcizek> they both link spindle.cmd to a parport
[02:16:50] <SWPadnos> I think you should maybe read the introduction to HAL :)
[02:17:02] <jcizek> i read the entire HAL manual cover to cover
[02:17:07] <SWPadnos> hmmm
[02:17:09] <jcizek> i am pretty good with hal
[02:17:11] <SWPadnos> then maybe you should read less ;)
[02:17:14] <jcizek> not so much with comp
[02:17:17] <jcizek> hahah
[02:17:40] <SWPadnos> components don't link anything, they only provide inputs and outputs that can be linked to other things, including hardware drivers such as the parport driver
[02:18:25] <SWPadnos> to have the THC component actually affect hardware in the real world, you have to connect its outputs to some hardware driver, such as the parport driver
[02:19:02] <SWPadnos> so several things need to be in place to make this happen: 1) you need to load all the relevant modules (THC component and parport driver, for example)
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[02:19:22] <SWPadnos> 2) you need to connect the THC component I/Os to the appropriate pins of the parport driver
[02:20:09] <SWPadnos> 3) you need to make sure that the THC processing function and the parport read and write functions are attached to threads, and that the thread(s) is(are) running
[02:20:18] <jcizek> i went back and re-read the comp file... it looks like i was mistaken... the comp file (which is the THC module) is actually reading IN that the torch is on.
[02:20:24] <SWPadnos> unless you have all three pieces, it won't work
[02:20:34] <jcizek> so i retract my earlier misguided statement that the HAL config is duplcated :-)
[02:20:54] <SWPadnos> but it reads it in from an internal (to the PC) signal that gets fed from the parport driver
[02:20:57] <SWPadnos> heh
[02:21:08] <jcizek> the THC module actually isn't needed to fire the torch
[02:21:29] <jcizek> i have a simple net command connecting the spindle command to a partport pin
[02:22:40] <SWPadnos> does the THC hardware need a heartbeat signal (the one on pin 17 in the wiki example)?
[02:22:50] <SWPadnos> also calle da charge pumpm signal
[02:22:53] <SWPadnos> called a
[02:23:00] <jcizek> no, no CP needed
[02:23:49] <jcizek> im not too concerned about the THC at this point, just the torch fire which isn't even connected to the THC
[02:24:48] <jcizek> actually that's not entirely true, the parport pin IS connected to the THC as the THC contains the torch relay, but it's a VERY simple THC (CandCNC's LCTHC) that requires no input besides "torch on" and outputs only 3 signals, ARC, UP and DOWN
[02:26:13] <jcizek> this is the line I am using to connect the HAL signal to the pin:
[02:26:15] <jcizek> net spindle-on motion.spindle-on => parport.1.pin-01-out
[02:26:48] <jcizek> and if i watch parport.1.pin-01.out on either the HALMETER or HALSCOPE, i see the successful transition
[02:27:53] <jcizek> did all that make sense? kind of rambled about that :)
[02:27:57] <SWPadnos> is parport.write in a thread? (ie, do you see any changes on the parallel port?)
[02:28:48] <jcizek> yep, here it is: addf parport.0.write base-thread
[02:28:53] <SWPadnos> uh huh
[02:28:57] <jcizek> and all the motors limits work fine
[02:29:03] <SWPadnos> and which parport is the net linking? ...
[02:29:36] <jcizek> well 0 of course (turning red and ducking head)
[02:29:47] <SWPadnos> presumably, all the mototr limits are on the first parport ... :)
[02:29:50] <SWPadnos> motor
[02:29:53] <jcizek> yep
[02:30:46] <SWPadnos> you could just use write-all, I think (parport.write-all, not parport.#.write-all)
[02:30:56] <SWPadnos> or add both reads/writes to the thread
[02:31:14] <jcizek> just added, my problem is solved :)
[02:31:22] <SWPadnos> excellent
[02:31:32] <jcizek> thank you so much... was getting quite frsutrated
[02:31:39] <jcizek> knew it was something simple... almost always is!
[02:31:46] <jcizek> been staring at code WAY too long today!
[02:31:46] <SWPadnos> yep. it's often the simple things
[02:31:50] <SWPadnos> heh
[02:32:16] <jcizek> now I can go about testing the UP, DOWN and ARC OK sigs are actually "wired" right in HAL :)
[02:32:37] <SWPadnos> enjoy
[02:32:48] <jcizek> thanks again for the assistance. Have a good night
[02:32:55] <SWPadnos> you too. see you
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[05:30:00] <willburrrr2003> with EMC , do I have to touch off all my tools each time I power up the machine?
[05:34:55] <mrsunshine> willburrrr2003, measure the tool and input the length in the tool tables?
[05:36:03] <willburrrr2003> i've been following the tool touch of procedure from the docs, and it's same as JT-Shop told me to do today....still having issues with it though.
[05:36:35] <willburrrr2003> I don't know if its the tool touch off thats not right or something I'm doing wrong with my cooridinate systems
[05:39:10] <willburrrr2003> I get my cut lines to show on the correct part of my screen (the re-d box indicating table area) and my tool showing in the appropriate place. then I load a g-code file that has worked, and try and run it...I get a minimum limit would be exceeded by move error and I don't know why...and sometimes my part and tool jump to the far left of my workspace even though I set the z-offset to be at the far left of my work area.... I'm frus
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[07:28:45] <mrsunshine> hmm i like this wick feed stuff but cant figure how reliable it is :P
[07:31:47] <Loetmichel> moin
[07:32:23] <Loetmichel> mrsunshine: wick feed for oil?
[07:32:27] <mrsunshine> yeah
[07:32:29] <Loetmichel> VERY reliable
[07:32:53] <mrsunshine> does the wick have to go all the way down to the bearing or just out of the little pipe in the resorvoir ?
[07:32:55] <Loetmichel> but you have to check for empty bucket now and then ;-)
[07:33:41] <mrsunshine> mm nicest would be to have some glass vial on the top :P
[07:33:48] <mrsunshine> so you can see the oil level
[07:33:49] <Loetmichel> all the way down to the bearing, best if it "grinds" against the rotating parts so it can give the oil where it belongs
[07:34:42] <mrsunshine> atm and the old bearing its just a threaded hole down, to a hole in the bearing that has a groove across it
[07:34:52] <mrsunshine> and it eats oil like little babies
[07:35:07] <Loetmichel> it doesent "give" oil. the oil is sucked/shered off the tuip and the cypillary force in the wick provides more oil at the tip
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[07:35:48] <Loetmichel> <. sorts his fingers... gross spelling errors ;-)
[07:36:50] <mrsunshine> Loetmichel, humm, but as the wick has to be withdrawn when not in use for it not to suck all the oil out, how does one know when it actualy hitts the spindle ...
[07:37:46] <mrsunshine> and the holw is off center so trying to get something so that it hits the actual spindle will be a problem :/
[07:38:32] <mrsunshine> think i have to see if i can find specs over the lathe of what parts etc is used incase its just oil cups that is supposed to be there
[07:38:46] <mrsunshine> as the holes were just open and klogged with brass dirt i dont know what has been there :/
[07:40:41] <Loetmichel> hmm, the wick SHOULDNT suck oil through with the spindle stationary... there is something wrong...
[07:40:44] <mrsunshine> http://i109.photobucket.com/albums/n48/S_J_H/southbendheadstock009.jpg bearings looks just like that =)
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[07:46:56] <mrsunshine> the lathe looks almost 100% as a south bend lathe
[07:47:51] <Loetmichel> yeah, normal glide bearings
[07:48:44] <Loetmichel> maybe your wick is to small for the hole it is in and the oil can seep trough?
[07:49:29] <Loetmichel> or your bearing clearance is too wide so the capillary forces which hoild the oil in the bearing normally are to weak?
[07:49:41] <mrsunshine> Loetmichel, do not have a wick atm
[07:50:05] <mrsunshine> just filled the hole with oil as i have made a new front bearing for it, they had run it without oil at all for a while
[07:50:17] <mrsunshine> so had about a 1mm side to side motion on the spindle :P
[07:50:23] <Loetmichel> anyway: normally there should not be any oil loss with stationary spindle
[07:50:32] <Loetmichel> only when rotating
[07:50:53] <mrsunshine> Loetmichel, yeah it sucks it when its spinning so i guess thats ok
[07:50:57] <mrsunshine> it stays filled when not
[07:51:13] <Loetmichel> ok, tats the normal behavior ;-)
[07:51:33] <mrsunshine> never used stuff like this so i dont know what is normal or not =)
[07:53:01] <Loetmichel> the siucking oil gets worse with more Bearing clearance
[07:53:34] <Loetmichel> so you may check for play in the spindle if the oil is running through like hell
[07:54:57] <mrsunshine> Loetmichel, do not have an indicator clock atm as i smashed it to bits by dropping it, but the new bearing is a very snugg fit, binds if no or little oil is present
[07:55:12] <Loetmichel> ups.
[07:55:17] <mrsunshine> or almost binds :P
[07:55:32] <Loetmichel> misalingment possible?
[07:55:56] <Loetmichel> so the bearing is snug on one point and loose on the other side?
[07:56:02] <mrsunshine> Loetmichel, no whats with the shaft and bearing in my hands :P
[07:56:06] <mrsunshine> no no
[07:56:10] <Loetmichel> have You reamed ist in place?
[07:56:12] <mrsunshine> its snugg all over :P
[07:56:24] <mrsunshine> reamed it in place ?
[07:57:05] <Loetmichel> insertet the new bearings and then put a reamer throug BOTH bearings to get tem perfectly alinged
[07:57:57] <Loetmichel> (if the have the same diameter AND are not to far away for the reamer)
[07:58:27] <mrsunshine> i think the bearing is fine, the spindle spins just fine and dandy whem its inserted and supported by both front and back bearing
[07:58:28] <Loetmichel> oh, i see: not the same diameter
[07:59:02] <Loetmichel> i am just fising for a reason for the oil consume
[07:59:22] <Loetmichel> normally there isnt THAT much oil loss
[07:59:38] <mrsunshine> yeah, but i guess, as the bearing was bone dry when i put the oil there and spun the spindle it had a bit of oil to consume =)
[07:59:46] <Loetmichel> hmmm, do you use the right oil iscosity
[07:59:49] <Loetmichel> +v
[07:59:54] <mrsunshine> Loetmichel, dont know =)
[08:00:06] <mrsunshine> just put in some oil that i use in the moped gear box :P
[08:00:09] <mrsunshine> just to try it out =)
[08:00:17] <Loetmichel> hmm
[08:00:48] <Loetmichel> normally bearings like this have a oil in it which is like honey
[08:00:49] <mrsunshine> and dont remember what kind it was, sae80 or something like that i think =)
[08:00:52] <Loetmichel> not like water
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[08:03:37] <mrsunshine> oh well, have to go and do some work =) thanks for the help =)
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[08:08:40] <Loetmichel> <- working already
[08:08:45] <Loetmichel> 2 hours
[08:08:56] <Loetmichel> (vnc rules)
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[09:42:59] <elmo40> I'd love to be able to vnc into work... too bad there is no robot there to load/unload material ;)
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[10:02:58] <Loetmichel> elmo40: wrong way. i am sitting @ work and Vncing home ;-)
[10:04:27] <Loetmichel> 'cause i am building shielded/ruggend computers it would be difficult to telework... (maybe i could fit the Apprentice with som Cameras and a tens unit zu remotecontrol him?) ;-)
[10:04:36] <Loetmichel> s/zu/to
[10:05:44] <AC-130H> what,you wanna build tempested computers? :)
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[10:09:24] <Loetmichel> AC-130H: i dont want to, i am the Prodiuction manager of a company which does ;-)
[10:09:44] <Loetmichel> -i
[10:09:50] <AC-130H> nice... whats it take to make a tempested computer?
[10:10:01] <AC-130H> just extra RF shielding?
[10:10:42] <Loetmichel> much aluminium, coopper foil (self adhesive), bags of filters an ferrite, gaskeets of all sorts and a high level of "how to" ;-)
[10:11:19] <AC-130H> so in essence a lot more RF shielding than the norm, hehe
[10:11:20] <Loetmichel> (and two Chambers lined with ferrite and antennas to measure if you have done right ;-)
[10:11:25] <AC-130H> faraday cage the computer
[10:12:14] <Loetmichel> no, the computer IS a faraday cage... but made out of 3mm aluminium sheet rather than 0,5mm steel sheet ;-)
[10:12:26] <Loetmichel> and MUCH more screws and gaskets ;-)
[10:12:43] <AC-130H> ya what i meant. makes me think "oh, you gotta aluminum foil hat the computer" LOL!
[10:12:59] <Loetmichel> someting that way, yes
[10:13:13] <Loetmichel> but a little more elaborate
[10:13:54] <AC-130H> i could use a bit of RFI sheilding to help protect against hash within a ham radio shack or SWL station, should i build up
[10:14:13] <Loetmichel> http://cordsen.com/page.php?45&productname=Workstation-ATS-5550T.jpg
[10:14:25] <Loetmichel> as an example of my company
[10:15:22] <AC-130H> oh nice, temptested toughbooks?
[10:15:22] <Loetmichel> http://cordsen.com/e107_files/downloads/Workstation-ATS-5550T.pdf
[10:15:28] <Loetmichel> yes
[10:16:05] <Loetmichel> and even fully ruggedized AND tempested (chinese) notebooks
[10:16:13] <AC-130H> hmmm
[10:16:30] <AC-130H> the way the front door closes, exactly like a microwave oven door seal
[10:16:55] <AC-130H> gotta have any gap in the seal smaller than the wavelength of the microwave RF :)
[10:17:01] <Loetmichel> just at the moment i try to fit a fullsize ATx board with I7 and a fat graphics board into one of the 2He minicomputers ;-)
[10:17:23] <AC-130H> cooling must be a bitch though?
[10:17:30] <Loetmichel> its a liiitle cramped in there ;-)
[10:17:37] <Loetmichel> yes, it is
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[10:18:15] <AC-130H> so how do you keep everything cool while maintaining tempest standards?
[10:18:38] <Loetmichel> many tiny holes for the fans
[10:18:57] <AC-130H> like fine windowscreen for the fan?
[10:19:01] <Loetmichel> same principle as the microwave: holes smaller than 1710 wavelength are ok
[10:19:09] <Loetmichel> 1/10
[10:19:29] <Loetmichel> look at the photos in the PDF
[10:19:40] <Loetmichel> and much fans
[10:19:54] <AC-130H> yeah, some parts of the photos arent clear
[10:19:59] <AC-130H> wrt the fan outputs
[10:20:43] <AC-130H> to get wavelength, it is half of f/1 right?
[10:20:59] <Loetmichel> the trick with the small casing is thalt i have managed 'til now to get it QUIET... we have some rugged servers which will operate from -20 to +55�c, where you can only operate them with hearing protection ;-)
[10:21:38] <AC-130H> hahahaha, stick a GE90 in there to cool the whole thing off (with exhaust going out of the cage) ;D
[10:21:45] <Loetmichel> inside are 7 40*40*40mm fans and one 80mm fan.. its like a runnin jet engine next to you ;-)
[10:22:38] <AC-130H> yeah... i had a computer that had a 10krpm hard drive in it.... couldnt stand hearing it for more than 5 mins, i'd turn my damned hearing aid OFF every time i sat next to it
[10:22:43] <AC-130H> very annoying whine
[10:23:06] <Loetmichel> <- sorry, have to work a little now ;-)
[10:23:51] <AC-130H> ok cool, take care :)
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[15:16:02] <aggrav8d> hi emc. i've added home switches to my X and Y axies. I'm still thinking about how to do Z and wondered if you have tips for me. I'd like to be able to automatically re-zero after every tool change. I'm guessing I need a metal plate and some way to test for voltage drop when the tool touches?
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[15:23:41] <cradek> aggrav8d: I've measured tools using a regular old microswitch and it works ok
[15:23:58] <cradek> although some do, I wouldn't use a plate, since it has no give
[15:24:07] <cradek> brb
[15:27:06] <Spida> anybody tried measurign optically?
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[15:35:47] <willburrrr2003> Good Morning all
[15:43:27] <willburrrr2003> I know g92.1 removes cooridinate systemoffsets, but does a g92.1 remove tool length offsets as well?
[15:43:37] <cradek> no
[15:43:49] <cradek> g49 removes tool length offset
[15:45:18] <Loetmichel> re @ home
[15:46:18] <willburrrr2003> damn, was hoping it did....turning off the tool length offsets would explain one of the problems I was having lastnight.....EMC tells me that the programmed move would be past min z limits, even though from what I see it is well within my redbox work area
[15:46:54] <cradek> if you're talking about the dialog you get when you start a program, does it run anyway if you tell it to continue?
[15:47:22] <willburrrr2003> nope, gives me the little red x error message saying the same thing
[15:47:40] <cradek> oh ok, then it really does exceed limits
[15:48:00] <willburrrr2003> yes, but I don't see why yet...
[15:49:09] <willburrrr2003> I was thinking I canceled tool offsets, whic would set the center of my toolpost to be the "tool" and trying to move that point to the z coordinate of the workpiece would indeed cause the cross-slide to pass the min z setpoint
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[16:04:20] <skunkworks> cradek: did the storms miss you?
[16:04:57] <cradek> yep, we just had wind
[16:05:04] <skunkworks> http://www.youtube.com/watch?v=O-D_tHLWvdg
[16:05:21] <skunkworks> yah - we drove back from montana in the toyota and got 42mpg
[16:05:32] <skunkworks> one heck of a tail wind
[16:05:58] <cradek> I got 39 on a trip last weekend - whee!
[16:06:29] <Jymmm> http://www.youtube.com/watch?v=t60bH0jiito
[16:06:31] <willburrrr2003> Skumkworks: that robot arm is cool, is it yours?
[16:06:32] <cradek> have not broken 40 yet. I'd have to drive 55...
[16:06:41] <skunkworks> heh - this is a corrola - gets about 32mpg normally
[16:06:48] <cradek> I don't think that robot has any kind of coordinated motion, it's just flailing
[16:06:54] <skunkworks> we where driving 79ish
[16:07:17] <cradek> that's really high mpg for that speed...
[16:07:23] <Loetmichel> skunkworks: is this a Scara-type robot?
[16:07:40] <skunkworks> not mine. random youtube post
[16:07:47] <skunkworks> looks scara like
[16:07:58] <skunkworks> the wind would almost blow you over
[16:10:57] <skunkworks> this is cool
[16:10:59] <skunkworks> http://www.youtube.com/watch?v=kpGAjKVLZgA
[16:11:27] <skunkworks> wonder what kind of following error. doesn't seem to be hooked into motion. (no velocty readout)
[16:12:38] <skunkworks> This shows you what acceleration does to velocity (notice how much it slows down during complicated moves)
[16:12:41] <skunkworks> http://www.youtube.com/watch?v=1jn2K4o48U0
[16:12:45] <cradek> sorry, your video is rejected because of corny music.
[16:12:56] <skunkworks> heh
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[16:25:13] <aggrav8d> cradek - i don't have any microswitches left over. besides plate, laser, and switch, are there any other methods? I don't even know yet how to tell EMC to re-zero the z after a tool change.
[16:26:05] <cradek> well obviously you need some kind of sensor. you can read it with probing moves. there is a sample of gcode that does this in the distribution.
[16:33:05] <anonimasu> acceleration seems like the most important part of a machine
[16:33:18] <SWPadnos> without it, you don't have a machine
[16:33:31] <cradek> any machine can accelerate in one direction
[16:33:34] <anonimasu> accel/decel time is what makes/breaks tools
[16:33:48] <SWPadnos> threading?
[16:33:59] <anonimasu> no, in general for small tools with long overhang
[16:34:14] <anonimasu> if you dont control direction changes and stuff well enough they dont last alot in hard materials
[16:34:36] <SWPadnos> overheating because they sit around too long?
[16:34:41] <SWPadnos> in corners
[16:34:42] <anonimasu> chip thinning and stuff(with cam geneerated toolpaths)
[16:34:46] <anonimasu> yeah and uneven chipload
[16:34:54] <SWPadnos> ah, ok
[16:35:26] <anonimasu> I cant wait for my sincos chips to arrive so I can spin the big servos :]
[16:35:33] <anonimasu> I got drive and power supply now
[16:35:39] <Tom_itx> anonimasu!
[16:35:47] <anonimasu> Tom_itx: how's it going?
[16:35:50] <Tom_itx> good
[16:36:01] <Tom_itx> picked up some alum for my pulleys today
[16:36:09] <anonimasu> nice
[16:36:11] <Tom_itx> man they sure have a good selection now
[16:36:19] <Tom_itx> all sizes and shapes
[16:36:20] <anonimasu> hehe, I with we had a place like that here
[16:36:28] <Tom_itx> you would love this one
[16:36:36] <jdhNC> where do you get it?
[16:36:38] <Tom_itx> 2.5" round
[16:36:38] <anonimasu> it kindof sucks when ordering to buy a 3meters because cutting is expensive
[16:36:43] <Tom_itx> local surplus
[16:36:53] <Tom_itx> they cut me a piece off
[16:37:05] <Tom_itx> walked away for $3.75
[16:37:19] <anonimasu> very nice, I'd be more tempted to play around with stuff with thoose kind of things if material were cheap
[16:37:19] <jdhNC> we have a scrap/recycling place. they sell by the pound
[16:37:43] <Tom_itx> jdhNC, that's what these guys do
[16:37:54] <Tom_itx> unless it's something special like extrusion
[16:38:20] <jdhNC> I think they sell that by the pound also, but they have never had any when I went
[16:38:48] <jdhNC> they put structural stuff and tubing,pipes, etc off in one area
[16:38:59] <anonimasu> did anyone of you ever figure out how to control gas flow with a oxyfuel machine?
[16:39:23] <jdhNC> a proportional valve?
[16:39:38] <anonimasu> cant find any special ones for gas
[16:40:04] <anonimasu> only ones for pneumatics
[16:40:33] <anonimasu> and im not sure how safe they are for that
[16:40:48] <Tom_itx> anonimasu, did i tell you i fixed my z axis?
[16:41:10] <anonimasu> I saw something about that before
[16:41:12] <anonimasu> http://ah.io23.net/ul/files/IMAG1287.jpg
[16:42:12] <anonimasu> emc powered :)
[16:42:19] <Tom_itx> nice
[16:42:46] <anonimasu> im not a big fan of the T configuration but it seems like with a bit of more counterweight and no belt drive on the y axis it'd work very well
[16:43:21] <Tom_itx> i'm gonna add a counterweight to my z to offset the motor weight
[16:43:39] <anonimasu> that's a good plan
[16:43:54] <anonimasu> I was gonna do that to my mill(or I might) but with my motors I can still throw the table up into the roof
[16:44:03] <Tom_itx> have a good size chunk of aluminum bronze
[16:44:11] <jdhNC> anon: asco makes solenoid valves for fuel gas, on/off but you could add a reg/orifice
[16:44:26] <anonimasu> I have that already, but I need flow control
[16:44:43] <anonimasu> since we cut 10-40mm stuff all the time
[16:45:05] <anonimasu> and it means everytime you have to eyeball settings, instead of grabbing them out of a lookup table
[16:45:17] <anonimasu> and no increasing gas flow for just piercing
[16:46:10] <anonimasu> I were pondering putting steppers on the knobs for regulating, but I have more money then time to make up a good solution for that that dosent require lots of building stuff so a valve would be very neat
[16:46:13] <jdhNC> mount a stepper to your regulator knob
[16:46:23] <jdhNC> heh
[16:46:39] <anonimasu> but then I need to have feedback so I can sense the position of it
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[16:47:53] <anonimasu> so im wondering if a pneumatic valve would do
[16:48:21] <jdhNC> we have lots of qb1/qb2 proportional valves, but I've only used them with air/argon/helium
[16:49:02] <anonimasu> I guess I could fab up a slave valve for acetylene, and stick a proportional air valve to control it
[16:49:47] <anonimasu> and use nitrogen or some inert gas so it dosent contact anything that can spark
[16:50:04] <anonimasu> but that's complex
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[16:52:53] <willburrrr2003> do I have to touch off my tools each time I power up my machine?
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[16:53:42] <anonimasu> not if you use the tool table
[16:54:17] <willburrrr2003> ok, good to know thanks
[16:54:49] <anonimasu> ofcourse, that depends on you having home switches on your machine
[16:55:30] <willburrrr2003> I do indeed, and they re working well :D
[16:55:38] <anonimasu> well, then it shouldnt be a problem :)
[17:42:38] <ssi> I started converting my '704 this weekend :D
[17:42:52] <ssi> ballscrews are turned and mounted in AC bearings using the stock bearing blocks
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[18:03:05] <jdhNC> my 704 is now supposed to be shipped in July
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[18:06:18] <ssi> yeah, they jacked me around on the date too
[18:06:22] <ssi> I ordered mine last september
[18:06:26] <ssi> and it was backordered til november
[18:06:28] <ssi> then december
[18:06:30] <ssi> then january
[18:06:36] <ssi> and it came around MLK day I think
[18:07:15] <alex_joni> http://failblog.files.wordpress.com/2011/05/epic-fail-photos-understanding-simple-concepts-fail.jpg
[18:08:48] <jdhNC> I ordered in Dec. Delivery was supposed to be jan 15, feb something, april something, may 15, june, now july1
[18:16:54] <ssi> hahah
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[19:22:53] <mrsunshine> hmm, is there any good cnc/gcode simulators ? :)
[19:23:22] <cradek> well, emc2 is very good at previewing/simulating gcode
[19:23:45] <cradek> but since that answer is so obvious...
[19:23:48] <mrsunshine> cradek, yeah but you cant actualy see what happends more then lines :/
[19:24:07] <cradek> you must mean something else then
[19:24:11] <cradek> what do you mean?
[19:24:54] <mrsunshine> a simulator, that you can specify material, cutter etc in and see the part get cut out from the gcode you write =)
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[19:26:03] <mrsunshine> something like cutviewer
[19:26:08] <mrsunshine> but that was expensive like hell =)
[19:29:23] <archivist> mrsunshine, help awallin_ with his cutsim
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[19:31:23] <archivist> http://www.anderswallin.net/tag/cutsim/
[19:41:51] <aggrav8d> cradek - which gcode does the position sensing?
[19:42:16] <cradek> you can use any of the probe codes
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[19:49:56] <willburrrr2003> is EMC set up to use a touch off plate?
[19:51:26] <mrsunshine> if i learn to program gcode by hand some and realy understand it i might have a job opertunity ...
[19:51:41] <mrsunshine> old machines that need manual input :P
[19:52:20] <Tom_itx> NSEE simulates cuts
[19:52:28] <Tom_itx> so does my cad cam
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[20:34:06] * JT-Shop has had a good day today at the customers plant in Newbern TN
[20:34:54] <Tom_itx> what do they plant?
[20:34:57] <Tom_itx> err make
[20:35:20] <JT-Shop> right now they are making snow blowers :)
[20:35:29] <JT-Shop> come fall they start making push mowers
[20:35:51] <Tom_itx> there's one here that makes cables for mowers
[20:35:51] <andypugh> Never heard of JIT?
[20:36:19] <Tom_itx> for one thing..
[20:36:41] <Tom_itx> got to watch one of their wire winders once
[20:36:56] <JT-Shop> these they are making atm are for over on your side of the pond andypugh
[20:37:29] <andypugh> Tell them not to make too many snow blowers then :-)
[20:38:57] <JT-Shop> and my garage door is in, but I can't get them on the phone to make arrangements to pick it up
[20:39:11] <JT-Shop> andypugh: did you ever get your part made?
[20:41:43] <Tom_itx> JT-Shop, time to git r done
[20:42:54] <Tom_itx> hopefully i got all the parts i need for the pendant on the way now
[20:43:16] <JT-Shop> cool
[20:43:30] * JT-Shop goes to pick up his still broken wing
[20:45:04] <andypugh> Hang on a minute JT-Shop
[20:46:02] <andypugh> OK, a bit more than a minute, it seems
[20:47:57] <andypugh> JT-Shop: https://picasaweb.google.com/bodgesoc/Gibbs?pli=1&gsessionid=Hmmdgo3fL1INffKPwAqX9w#5613355826121843106
[20:48:01] <andypugh> (And the next one)
[20:56:51] <aggrav8d> would any of you fine gentlemen and ladies know where i might find a pattern similar to http://www.cardboardsafari.com/shop/product_cbs1001.php ?
[21:00:07] <andypugh> I don't think that link works
[21:00:36] <Tom_itx> i don't either
[21:00:51] <Tom_itx> Failed to locate session identifier key
[21:00:56] <Tom_itx> whatever that means
[21:05:19] <ssi> andypugh: is that a part you cast?
[21:05:36] <andypugh> It's the pattern for a casting I am going to have made.
[21:05:45] <ssi> ah I see
[21:05:58] <ssi> wood? mdf?
[21:06:39] <andypugh> Plywood (3 layers glued together) and CNC milled.
[21:06:47] <ssi> gotcha
[21:06:48] <ssi> looks great
[21:08:52] <andypugh> It's the Y-axis motor/belt mount
[21:09:26] <andypugh> I have some moulding sand, I am tempted to test it :-)
[21:09:58] <ssi> do you have a furnace?
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[21:10:33] <andypugh> No, but I know a foundry in Birmingham will do it for £25 each.
[21:10:54] <andypugh> I was just going to check that the relief angles work.
[21:10:59] <ssi> gotcha
[21:11:47] <Tom_itx> what's the pattern made out of?
[21:11:51] <Tom_itx> wax?
[21:11:55] <andypugh> Plywood
[21:12:20] <Tom_itx> end cover for a lathe?
[21:12:29] <ssi> now, in sand casting, are the relief angles just so you can remove the pattern without disturbing the sand?
[21:12:37] <andypugh> ssi: yes.
[21:12:44] <ssi> gotcha
[21:12:55] <ssi> cause like, in molding, it's so the molded part doesn't lock into the mold
[21:13:01] <ssi> but sand would just shake free
[21:14:02] <Tom_itx> do you make 2 halves and join them?
[21:14:16] <Tom_itx> i've never done sand or any type of casting...
[21:14:28] <andypugh> I am hoping that they can do that with a simple cope and drag.
[21:14:32] <Connor> What do you think would be better for making a enclosure for a shop vac (sound proof wise). 3/4" Plywood, or 3/4" MDF. I plan on making a box about 24"x24"x32" and using it as a base for a drill press or bench top band saw, put my shop vac below, and vent it outside using a Clothes Dryer vent.
[21:14:59] <andypugh> MDF would be more soundproof.
[21:15:10] <Connor> If I have enough room, I'll also line the inside with 1/2" or 3/4" pink insulation foam.
[21:15:16] <andypugh> Ideally you would line it in foam/lead/foam
[21:15:51] <andypugh> http://www.cbsonline.co.uk/product/LEAD_FOAM_SANDWICH_1m_x_600mm_LFS2
[21:15:57] <andypugh> But that is not cheap.
[21:16:06] <Connor> Lead? Ugg
[21:16:19] <andypugh> Foam by itself doesn't do much, you need mass to absorb sound.
[21:16:43] <andypugh> Lead is fine as long as you don't eat it by the pound.
[21:17:17] <ssi> or look at dynamat
[21:17:21] <ssi> might be cheaper, might not
[21:17:25] <ssi> pretty sure it's lead free tho
[21:17:26] <ssi> :P
[21:17:36] <andypugh> We build a lot of soundproof boxes at work to isolate parts to determine sound contributions. foam/lead/foam is the only thing that really works.
[21:18:21] <Connor> Yea, my 1-2-3 Blocks came in.. now if my mill would just show up..
[21:19:00] <Connor> I'm not going for complete noise isolation, just to be able to work in the shop without having earmuffs on while the vac is running.
[21:19:22] <andypugh> I think Dynamat is a sheet vibration absorbing pad (for structure-path sound). This application is air-path noise.
[21:19:27] <Connor> If I run the hose under the door (little door flap for stuff like that) I can barely hear the vac.
[21:19:56] <andypugh> Connor: Can you build a little cinderblock enclosure?
[21:20:02] <Connor> but, in order to keep it outside. I would need to run a line up the wall 7 to 8' feet, then over another 8' then back down
[21:20:30] <Connor> I could, but that would eat up allot of space.
[21:20:37] <Connor> Let me go take pictures.. be back in just a few.
[21:20:58] <andypugh> I don't know if it is obvious, but you just touched on my day-job :-)
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[21:29:57] <Polan_User> Hello everyone again
[21:30:38] <Polan_User> Did enyone can tell something about RTAI kernel pathing ?
[21:30:49] <Polan_User> I have got the following error:
[21:31:06] <Polan_User> kernel BUG at fs/buffer.c:1263!
[21:31:45] <andypugh> Polan_User: Try these instructions?
[21:31:45] <Polan_User> Error appears whe RTAI modules are loading and hung all system
[21:31:46] <andypugh> http://code.google.com/p/neo-technical/wiki/emc2arch
[21:32:16] <andypugh> Or: http://code.google.com/p/neo-technical/wiki/emc2ubuntu
[21:32:26] <andypugh> (Depending on which is closest to your system)
[21:32:45] <Polan_User> system: Gentoo
[21:33:07] <Polan_User> I follow instruction from linuxcnc wiki
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[21:33:43] <andypugh> I found the neo-technical instructions to be more up to date, and easier to follow.
[21:33:56] <Polan_User> Thanks for links, I'm reading
[21:35:15] <Polan_User> I have one more question: Is there posibility to run EMC2 on ARM processor ?
[21:35:19] <Polan_User> anyone try ?
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[21:36:17] <Connor> http://www.ivdc.com/cnc/shop/
[21:36:50] <Connor> 558, that's the back wall.. the radial arm saw is going away. That's were the G0704 is going.
[21:37:35] <Connor> 559 is my workbench. Stainless steal elevator door on steel I-Beam rack used to hold 500lb bombs for the US Airforce in the 70's.
[21:37:51] <andypugh> Polan_User: It ought to be, Jon Elson has been trying to get EMC2 running on Beagleboard. There is supposedly an RTAI patch for the ARM kernel.
[21:37:54] <Polan_User> I'm asking about ARM architecture processors
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[21:38:28] <Polan_User> is it working ??
[21:38:40] <andypugh> No.,
[21:39:16] <Connor> 562, my drill press and bandsaw. One of those stands would be replaced with the ShopVac enclosure. I plan on putting a 2nd stage vortex bucket in the corner.
[21:39:25] <andypugh> Connor: Cinderblock shed under the work table.
[21:39:48] <Polan_User> No or Not yet :) ??
[21:40:02] <Connor> wrong side of the room. I would have to run hoses up and over and loose suction.
[21:40:25] <andypugh> Polan_User: http://thread.gmane.org/gmane.linux.distributions.emc.devel/2338/focus=2742
[21:40:40] <Polan_User> Thanks
[21:40:41] <JT-Shop> andypugh: nicely done
[21:41:09] <andypugh> JT-Shop: It does look like a pattern at least.
[21:41:15] <Polan_User> Ok, I'm going to compile my RTAI kernel (need reboot)
[21:41:25] <Polan_User> Thanks very much for help
[21:41:27] <Polan_User> by
[21:42:13] <Connor> 567 and 568 is my unistrut overhead trolley.
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[21:42:34] <Connor> and 569 is my shop vac. :)
[21:43:21] <Connor> I want to put a small enclsoure around the hot water heater too, just to protect it from stuff flying.. :)
[21:48:06] <Connor> Whats the best way to hold the enclosure together if I do it out of MDF? I used cross dowels on my CNC enclosure, but, those are a pain. I was hoping to just be able to use good ole #8 wood screws.
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[21:48:35] <andypugh> I was wondering about the possibility of putting it up above the ceiling, but then it would be a pain to empty it (I might well do that with my compressor)
[21:49:43] <andypugh> Connor: Ali angle?
[21:50:21] <andypugh> Or CNC-cut dovetails.
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[21:51:55] <Connor> Too big for my CNC.
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[21:53:48] <andypugh> Two layers with steel between them and staggered corners would probably work best. (mass, you need mass to kill sound)
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[21:58:45] <Connor> How much suction do you loose if you run a shop vac through 2" (or 2 1/2") PVC for around 20 feet ?
[22:00:23] <andypugh> Smooth PVC pipe I would imagine would be OK, as long as it is a straight run or has swept bends.
[22:01:09] <Aero-Tec> someone had mentioned before of some sort of transmission sensor used with EMC2 for encoders from gears teeth and holes drilled
[22:01:14] <Connor> wouldn't be a straight run. 90 to get it going up the wall, 90 to go over the door, then another 90 to go down the other side, and something to get into the cyclone.
[22:01:31] <Aero-Tec> does anyone here know what that sensor is and where to get it?
[22:01:55] <andypugh> 15' of corrugated hose (probably 1.25") on my home vacuum cleaner defintely reduces the suck as you get closer to the top of the stairs.
[22:02:04] <Aero-Tec> have a gear on my lathe I want to use with it
[22:02:14] <andypugh> Transmissive or reflective?
[22:02:20] <Aero-Tec> also is it any good?
[22:02:31] <Aero-Tec> magnetic
[22:02:43] <Connor> hall effect sensors.
[22:02:53] <Aero-Tec> senses the gear teeth
[22:03:02] <Aero-Tec> I would guess so
[22:03:13] <Aero-Tec> with its own build in magnet
[22:03:43] <andypugh> http://cgi.ebay.co.uk/LJ12A3-4-Z-BX-3-Wire-Inductive-Proximity-Switch-Sensor-/140545011920
[22:03:44] <Aero-Tec> with I had a log back then so I could look it up
[22:04:45] <Aero-Tec> wish
[22:05:00] <Aero-Tec> that is close but not the part
[22:05:11] <andypugh> Or you could use http://uk.rs-online.com/web/search/searchBrowseAction.html?method=getProduct&R=4550931&cm_vc=av_uk
[22:05:27] <andypugh> (Which is optical, but works well on my lathe)
[22:05:40] <andypugh> Aero-Tec: I was just finding you a cheap one :-)
[22:06:15] <Aero-Tec> not in the gear box with the oil flying around.
[22:06:28] <Aero-Tec> cool
[22:06:31] <andypugh> No, inductive sounds right for that application.
[22:06:59] <andypugh> Make sure you get one with a small enough sensor to pick up an individual tooth.
[22:07:06] <Aero-Tec> 4 pounds whats that in USD?
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[22:07:43] <Aero-Tec> that is why I am looking for the one recommended, it was small and cheap
[22:08:04] <andypugh> Just search for the auction on your local ebay: 140545011920?
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[22:08:27] <andypugh> But it's about $8 including delivery from HK
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[22:11:19] <SWPadnos> some gear tooth sensor part numbers here: http://pico-systems.com/bridge_spindle.html
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[22:11:47] <SWPadnos> or one at least
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[22:13:59] <andypugh> ABS sensors ought to work well too.
[22:16:09] <Aero-Tec> SWPadnos: that be the one, thanks
[22:16:18] <SWPadnos> sure
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[22:44:15] <Aero-Tec> the ebay one is good for 150hz
[22:44:27] <Aero-Tec> the other one is good for 10kz
[22:45:15] <Aero-Tec> but even that is not much good on a 27 tooth gear
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[22:45:48] <Aero-Tec> all you could have is 3 teeth for about 3300 rpm
[22:46:16] <Aero-Tec> mu lathe goes to 3800 rpm
[22:46:20] <Aero-Tec> my
[22:46:52] <Aero-Tec> so 2 teeth is all I can get it looks like
[22:47:10] <willburrrr2003> onght should be fun, I'm gonna ue my lathe to make an optical encoder wheel for itself. This will give me speed indication into emc, and should allow me to thread. will 32 pulses per revolution be enough to make accurate threading?
[22:47:31] <SWPadnos> Aero-Tec, don't confuse seconds with minutes
[22:47:49] <SWPadnos> 10 kHz is 10000 counts per second, which is ~360 revs per second on a 27-tooth gear
[22:48:04] <SWPadnos> which is ~22 k RPM
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[22:50:19] <Aero-Tec> lol
[22:50:22] <Aero-Tec> oops
[22:50:33] <SWPadnos> it's common :)
[22:50:47] <andypugh> willburrrr2003: should be. With software-counting you might not be able to handle many more.
[22:51:04] <Aero-Tec> and I was thinking about making sure I did not screw up like that earlier
[22:51:11] <willburrrr2003> Thanks Andy, good to know
[22:51:59] <willburrrr2003> Andypugh : does that mean that EMC can't hndle high speed pulse inputs?
[22:52:25] <Aero-Tec> like when your soldering 2 wires and have heat shrink, and you remember about the heat shrink early but forget when your doing the soldering
[22:52:43] <andypugh> willburrrr2003: What's your base thread rate?
[22:52:57] <SWPadnos> I would never ever ever ever ever do that
[22:53:03] * SWPadnos whistles softly away
[22:53:23] <Aero-Tec> lol
[22:53:33] <willburrrr2003> Areo-Tec: hate it when that happens, and has happend a couple times ;) and I wouldn't do that 3 times in a row on the same part ......:-p
[22:53:38] <andypugh> Aero-Tec: My dad calls that "Dura-plugging yourself" after a UK mains plug that requires you to pass the cable through the back of the plug before assembly.
[22:54:17] <willburrrr2003> AndyPugh: I am not sure what my base thread rate is, I will have to check when I get home.
[22:54:58] <Aero-Tec> it would depend if your running EMC2 with PP or with a interface card
[22:55:13] <Aero-Tec> the card would be much quicker
[22:55:22] <willburrrr2003> just a simple PP card
[22:55:44] <Aero-Tec> and some cards have CPUs on them that handle some of the signal stuff
[22:56:13] <andypugh> Yeah, Mesa card etc is good to 10MHz, P-Port with 20,000nS base thread is OK to 25kHz (or maybe 12khz)
[22:57:05] <Aero-Tec> mesa has some nice cards
[22:57:13] <willburrrr2003> ok, on a side note.... I get to tr the halscope once I get the input hooked up for the speed encoder hehe
[22:59:22] <willburrrr2003> well, off to the commute...I will let you guys know how the encoder goes....
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[23:00:04] <Aero-Tec> that chip is very cool
[23:00:11] <Aero-Tec> real screamer
[23:07:39] <Valen> any suggestions for a 4 pin plug to go on the back of our spindle
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[23:08:08] <jdhNC> 4-pin XLR?
[23:08:23] <Valen> 240V
[23:08:41] <Valen> it has an xlr plug on it and we are both afraid of getting electrocuted from it lol
[23:12:05] <andypugh> Valen: http://www.neutrik.com/uk/en/audio/210_308361/NL4FC_detail.aspx
[23:12:50] <Valen> i was looking more like these http://au.element14.com/amphenol/c016-20d003-100-10/socket-free-screw-3p-e-way/dp/1188979
[23:12:58] <andypugh> Actually a loudspeaker connector, but 240V/20A rated, fully shrouded contacts in plug and socket, and very nice quality/feel. Also really cheap.
[23:14:08] <andypugh> Valen: compare the prices: http://www.rapidonline.com/Cables-Connectors/Connectors-Audio-Video/Loudspeaker/Speakon-4-pole-loudspeaker-connectors/67751
[23:15:08] <andypugh> It does say "Warning, not to be used as a mains connector" but I am ignoring that and using them for 3-phase motor connectors on my machine :-)
[23:15:13] <Valen> hmm interesting
[23:15:35] <Valen> any suggestion for suppliers?
[23:16:09] <andypugh> The contacts are a silver-plated pin in the socket, and a set of multi-finger contacts in the plug. When you twist to remove it also disconnects first
[23:16:49] <Valen> they are cheap i'll grant you that lol
[23:17:31] <andypugh> http://www.jaycar.com.au/productView.asp?ID=PP1080&keywords=speakon&form=KEYWORD
[23:17:35] <andypugh> Less cheap in Aus
[23:18:11] <andypugh> The price belies the quality. I really like them.
[23:18:11] <Valen> yes but there is a shop like 5 minutes up the road from me
[23:19:09] <Valen> so we may well get that though waterproof would be nice
[23:19:14] <DaViruz> andypugh: they make a model for mains connectino called powercon too
[23:19:21] <andypugh> There is a 3-pole version intended for mains use called Neutrik Powercon.
[23:19:25] <DaViruz> probably only three pole thougj
[23:20:19] <andypugh> Valen: They are not waterproof, but they are watertight, if that makes sense.
[23:20:25] <Valen> yeah
[23:20:32] <Valen> a splash wont get in
[23:20:38] <DaViruz> splash proof, not submersion proof
[23:21:18] <andypugh> No, what I mean is that the socket will fill with water, but none of it will leak into the case.
[23:21:28] <Valen> oh, thats not cool
[23:21:49] <Valen> we found out the last one filled with water when the ground fault plug tripped
[23:22:01] <Valen> i'll look at packing it with a grease
[23:24:22] <andypugh> Perhaps try this component chooser? http://uk.rs-online.com/web/compChooser/compChooserAction.html?method=retrieveTfg&intialAttributePageFlag=Y&familyMemberId=&Nr=AND%28avl%3auk%2ccomponentChooser_uk%3aY%2csearchDiscon_uk%3aN%29&Ne=4294957561&N=4294584593
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[23:24:48] <Valen> yeah i was going through an australian one and came across those amphenol ones
[23:24:53] <Valen> ip67 rated etc
[23:24:57] <Valen> but ~2 week lead time
[23:25:42] <andypugh> I was expecting to see IP rating on that chooser, but it isn't
[23:26:48] <Valen> ahh actually those amphenol ones are available tomorrow
[23:26:53] <Valen> just need a thinner cable
[23:29:20] <Valen> thanks for the heads up on those connectors though andypugh I think we'll wind up using them in slightly drier locations ;->
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[23:41:37] <elmo40> Loetmichel: what is the price range for those cases?
[23:53:16] <andypugh> Right, night all.
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[23:53:30] <JT-Shop> goodnight Andy
[23:55:39] <Valen> now i just need some shielded cable ;->
[23:58:22] <jdhNC> anyone know if you can search libraries in Eagle?
[23:59:18] <Tom_itx> what are you lookin for?
[23:59:30] <Tom_itx> you can.. sorta
[23:59:34] <jdhNC> a footprint for a 6pin DIP
[23:59:40] <jdhNC> or anything that looks like that
[23:59:55] <Tom_itx> open ref-packages.lbr and you will find one