#emc | Logs for 2009-08-03

[00:29:42] <jimbo655> Gamma-X: I would not buy braking resistor without knowing the wattage and resistance that your control requires for you motor. After looking at what mine requires and what is out there it is all over the map.
[00:31:29] <jimbo655> Mine is looking for 100 Ohms at 150 watts for 2 hp 10%. The next controller is 200 watts and 75 ohms for 3 hp 10%. happy hunting.
[00:32:47] <renesis> so guys how do thread mills work
[00:33:09] <renesis> i just like, puts the cutter into the side and helix down at same pitch as screw?
[00:33:38] <renesis> and this means i would never have to tap a hole again?
[00:40:39] <toastyde1th> usually you start at the bottom and go out, but yeah
[00:41:39] <toastyde1th> drop it in at the center of the hole, turn on cutter comp, move out to the edge, and then loop a bunch of incremental full circles with the Z depth as your pitch.
[01:02:50] <renesis> neat
[04:25:09] <ds3> hmm
[09:25:26] <piasdom> g'mornin all
[09:34:38] <numen> hello
[09:35:07] <numen> does anyone know a possibility to use my inventor part files on emc2?
[09:35:36] <archivist> via a cam program of some sort
[09:36:45] <archivist> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Cam
[09:37:07] <numen> are there any free cam programms?
[09:38:16] <archivist> that page I just linked has mostly free, but free cam is in its infancy for complex parts
[09:39:05] <numen> thes are just not very complex 2.5d parts
[09:39:12] <numen> shall i show you an example?
[09:39:42] <numen> is it possible, to add a cam like these ones direct in emc?
[09:39:45] <archivist> there is a new program being developed HeeksCNC
[09:40:15] <numen> where to find?
[09:40:25] <archivist> google code
[09:40:45] <numen> works on win or on linux?
[09:40:51] <archivist> both
[09:42:23] <numen> thx looks nice
[09:50:59] <numen> but how does this work?
[09:52:35] <numen> how do i create my gcode file?
[09:53:51] <archivist> Im not using HeeksCNC, Im helping with HeeksCAD only at the moment
[09:53:52] <numen> i opend my stl file, but how can i select a sketch? this is not possible...
[09:54:23] <archivist> there is no sketcg in an stl file
[09:57:59] <numen> but with step or iges file, it does not work, too
[10:01:29] <numen> strange tool
[10:01:55] <numen> can you help me, if i provide you an step or iges file?
[10:02:03] <archivist> its early days add comments on the mailing list
[10:02:24] <archivist> like I said i have NOT used heekscnc
[10:03:34] <archivist> you can ask in #cam, the authors hang out in there at odd times of day
[10:08:06] <numen> thx
[12:32:06] <numen> re
[12:33:33] <numen> re
[12:43:21] <numen^besoffen> re
[12:43:25] <numen^besoffen> numen^besoffen is now known as numen_
[13:02:47] <Mentor_> Hello
[13:03:16] <Mentor_> I have 2 questions about emc2...
[13:04:14] <Mentor_> first: emc2 can move reverse program ?
[13:05:12] <Mentor_> is someone here?
[13:05:17] <archivist> plenty
[13:06:08] <Mentor_> sorry for my english
[13:06:44] <alex_joni> Mentor_: the whole program? or just one-two steps?
[13:06:51] <Mentor_> whether the program has an option "reverse/forward program"
[13:07:22] <Mentor_> about 100 steps
[13:08:33] <SWPadnos> noi
[13:08:37] <SWPadnos> no
[13:09:20] <Mentor_> only one-two steps ?
[13:09:54] <Mentor_> no't good
[13:10:03] <SWPadnos> first, EMC doesn't run on steps, it runs on positions
[13:10:03] <Mentor_> not*
[13:10:13] <archivist> why do you want that
[13:10:19] <SWPadnos> step/dir is just one of the outpt options
[13:10:39] <archivist> I rerun after an adjustment
[13:10:43] <alex_joni> I meant step as a g-code line
[13:10:46] <SWPadnos> if you want to back up for EDM (or similar) purposes, then there are probably other ways to accomplish your goal
[13:11:02] <alex_joni> but if it's a couple, the answer is no
[13:11:24] <alex_joni> if you want the whole program run reversed, that might be possible (by parsing, and inverting the file :D)
[13:11:43] <Mentor_> i have machine 4 burners
[13:12:32] <Mentor_> when one turns off the burner, I have to withdraw the
[13:14:25] <Mentor_> then i need reversed program ...
[13:14:56] <Mentor_> to this point
[13:15:45] <Mentor_> in Mach is the option, but it has errors
[13:16:44] <Mentor_> :( not good
[13:17:47] <archivist> a string processing program could produce reversed programs
[13:18:26] <archivist> depending on how they work, due to the burner on/off and any o codes
[13:36:14] <numen__> numen__ is now known as numen
[17:12:58] <ds3> h
[17:16:58] <mozmck_work> i
[18:51:14] <geo01005> hi seb-kuzminsky
[19:02:30] <numen___> numen___ is now known as numen
[19:35:01] <wildlife_> kanzure last time I have written some example feedrate to the chat, but i probably was offline at that moment
[20:22:26] <numen__> re
[21:14:00] <SWPadnos_> SWPadnos_ is now known as SWPadnos
[21:15:55] <numen__> numen__ is now known as numen
[21:43:29] <geo01005> heh, I'm an idiot.
[21:46:06] <geo01005> There isn't a way to rectify all three phases of a 208/120 source to get 120*sqrt(2)VDC...
[21:51:09] <SWPadnos> no, it would be 208*sqrt(2 I think
[21:51:14] <SWPadnos> +)
[21:55:07] <geo01005> Yeah, you can get sqrt(2)*120 from each phase, but you can't put just put the rectified voltage from each phase in parallel.
[21:55:16] <PCW> Cant you just use the + 3 phase bridge output relative to neutral?
[21:55:34] <geo01005> hmm.
[21:55:48] <ds3> why not OR them together with a diode?
[21:55:52] <SWPadnos> http://www.allaboutcircuits.com/vol_3/chpt_3/4.html
[21:55:59] <SWPadnos> you do parallel the outputs of each phase
[21:56:06] <ds3> rectify then a series diode and parallel that
[21:56:23] <geo01005> thanks PCW, I didn't think about that.
[21:56:34] <ds3> is 120/208 delta or wye?
[21:56:37] <SWPadnos> only if you have access to the neutral
[21:57:09] <geo01005> Well so it is a delta to wye transformer.
[21:57:22] <geo01005> So I do have access to the neutral.
[21:58:35] <geo01005> I wish I had time to take a bunch of EE classes.
[21:59:26] <Jymmm> You just gotta love git!
[22:00:17] <Jymmm> git-svn clone svn_url<enter> done
[22:00:49] <geo01005> thanks again guys :)
[22:01:21] <ds3> git has a svn emulator now?
[22:01:24] <PCW> Probably not the best for high power because its basically 1/2 wave per leg, there may be some significant derating
[22:01:35] <Jymmm> ds3: always has, and cvs too
[22:02:16] <ds3> oh nice, didn't know about it til now
[22:02:21] <ds3> now if it only had it for hg
[22:02:59] <Jymmm> Yep, so even if projects use cvs/svn, you can still use git and they have nfc.
[22:03:27] <Jymmm> You can even import into imap folders
[22:03:36] <ds3> imap is taking to too far :P
[22:03:37] <geo01005> PCW, you mean derating on the bridge rectifier?
[22:03:57] <Jymmm> ds3: Nope, you can do checkin/out via email.
[22:04:55] <ds3> git spam :(
[22:06:54] <PCW> No, transformer...
[22:07:32] <Gamma-X> anyone know a good site to buy electronic supplys . I want to buy a good meter..
[22:08:06] <bill2or3> * bill2or3 got his on ebay.
[22:08:16] <Jymmm> Gamma-X: can you be more specific?
[22:08:36] <bill2or3> www.jameco.com carries fluke meters
[22:08:39] <Jymmm> handheld? $100? $400?
[22:08:44] <Jymmm> ew
[22:08:55] <ds3> on the extreme end is the HF $2 meters
[22:08:56] <Gamma-X> handheld, sumtin with a lot of options.
[22:09:19] <Gamma-X> I wonder if i can get a fluke that has a built in osiliscope that is handheld! lol
[22:09:28] <Jymmm> Gamma-X: Yes, it's $3000
[22:09:38] <Gamma-X> daammmn haha
[22:09:39] <bill2or3> I think so, but probably > your budget.
[22:09:50] <Gamma-X> ok well i want something that will lastmaby under 400
[22:10:09] <Jymmm> http://us.fluke.com/usen/Products/Fluke+190.htm
[22:11:22] <bill2or3> fwiw, I got a 116, I've been happy with it.
[22:11:34] <Gamma-X> wow the 190 series is rediculous haha
[22:11:45] <Gamma-X> I want somthing not so expensive haha
[22:12:23] <Jymmm> http://www.amazon.com/Fluke-FLUKE-87-5-Digital-Multimeter/dp/B0002YFD1K
[22:13:45] <Gamma-X> Jymmm, anything that much beter for an extra 100 or so?
[22:14:22] <Jymmm> Gamma-X: I bought my Fluke 7 eons ago, and still going.
[22:14:29] <Jymmm> Fluke 77
[22:14:33] <bill2or3> here's a tiny scope for you: http://www.seeedstudio.com/depot/digital-storage-oscilloscope-with-panels-p-167.html
[22:14:34] <bill2or3> heh
[22:14:38] <Jymmm> Check out flukes atalog
[22:15:22] <Jymmm> bill2or3: that's kinda cool
[22:15:33] <bill2or3> I got the kit, mostly just for fun.
[22:15:35] <Jymmm> Gamma-X: Did you want a scope?
[22:15:47] <Jymmm> bill2or3: how is it? How do you calibrate it?
[22:15:48] <bill2or3> my smd soldering skills are much better now. :-)
[22:16:14] <Gamma-X> Jymmm, I do but I havnt even looked into them yet
[22:16:33] <Jymmm> Gamma-X: Are you going to be doing mostly bench stuff?
[22:16:46] <Gamma-X> yup
[22:17:04] <Gamma-X> for the o scope bench
[22:17:15] <Gamma-X> or atleast close to a bench haha
[22:17:59] <Jymmm> ask SWPadnos about this http://cgi.ebay.com/New-Digital-Color-Oscilloscope-OWON-PDS5022S-w-USB_W0QQitemZ130318650557QQcmdZViewItemQQptZBI_Oscilloscopes?hash=item1e5798ccbd&_trksid=p3286.c0.m14
[22:18:19] <Gamma-X> ok
[22:18:38] <bill2or3> that looks not-awful, a lot smaller than what I've got now.
[22:18:49] <SWPadnos> the specs say it's a piece of shit, but I've never touched one
[22:19:02] <geo01005> PCW, I see that. Do you think there is any way around that?
[22:19:02] <Jymmm> SWPadnos: I new player on the market it seems http://cgi.ebay.com/Digital-Oscilloscope-Rigol-DS1102E-100MHz-Color-USB-2CH_W0QQitemZ120414328892QQcmdZViewItemQQptZBI_Oscilloscopes?hash=item1c0940d83c&_trksid=p3286.c0.m14
[22:19:16] <bill2or3> * bill2or3 wonders about the quality.
[22:20:17] <Jymmm> SWPadnos: Another noobie... http://cgi.ebay.com/ATTEN-25MHZ-COLOR-DIGITAL-STORAGE-OSCILLOSCOPE-USB-232_W0QQitemZ350230657000QQcmdZViewItemQQptZBI_Electrical_Equipment_Tools?hash=item518b5fb7e8&_trksid=p3286.c0.m14
[22:20:40] <SWPadnos> 320x234 resolution? that's about like my phone
[22:20:54] <Jymmm> which? 1, 2, or 3?
[22:20:58] <SWPadnos> 2
[22:21:20] <Gamma-X> what I Realy need is dynamic break resistor
[22:21:33] <SWPadnos> you need to get within 1000 miles ofthe machine first
[22:21:59] <Jymmm> * Jymmm hands Gamma-X a 50lb bag of salt and bucket of water.
[22:22:27] <SWPadnos> 3 has teh same display resolution
[22:22:29] <Gamma-X> lol
[22:22:31] <PCW> Another transformer is probably the best option, maybe SCR bridge with phase control?
[22:22:32] <SWPadnos> the
[22:22:47] <Jymmm> SWPadnos: Ok, so back to the Owon then?
[22:22:59] <SWPadnos> no. wait for something useful to show up
[22:23:29] <geo01005> PCW, I suppose I'll just use a single phase transformer then.
[22:23:35] <Jymmm> SWPadnos: Oh, they show up, but I'm still waiting for your arm,leg, irst born, AND/or c #
[22:23:40] <Jymmm> first
[22:23:44] <Jymmm> cc#
[22:23:52] <SWPadnos> I have two fine scopes. you can buy this one on your own
[22:24:33] <Jymmm> SWPadnos: I dont wanna a scope, I want a SA =)
[22:24:47] <SWPadnos> that, you can definitely buy for yourself
[22:24:51] <Jymmm> In the PHz range!
[22:24:56] <SWPadnos> my arms and legs aren't valuable enough
[22:26:06] <Jymmm> SWPadnos: http://www.tequipment.net/OWONHDS2062M.html
[22:28:07] <Jymmm> serial =(
[22:28:25] <Jymmm> wait, has usb jack... I'm confused
[22:28:52] <Jymmm> SWPadnos: $900
[22:29:10] <SWPadnos> http://cgi.ebay.com/Lecroy-9374TM-Oscilloscope-4-Channel-1GHz-2GSa-s_W0QQitemZ330347312614QQcmdZViewItemQQptZBI_Oscilloscopes?hash=item4cea3bf5e6&_trksid=p3286.c0.m14
[22:29:44] <Jymmm> Mmmm burnin!
[22:29:49] <Jymmm> Mmmm burn-in!
[22:30:08] <Jymmm> Amber Monochrome
[22:30:30] <Jymmm> Goes by yhe ickname 'Lucky'
[22:35:22] <SWPadnos> ok. dinnertime. bbl
[22:37:39] <Gamma-X> SWPadnos, What brand multi meter do u use
[22:41:27] <geo01005> PCW sorry to bother you again, but wouldn't the half wave three phase be better than the single phase transformer?
[22:43:37] <geo01005> I suppose only slightly...probably not worth the cost of the three phase xfmr.
[22:44:47] <Gamma-X> I like the owon one... anyone have it?
[22:56:33] <kanzure_> kanzure_ is now known as kanzure
[23:03:18] <Gamma-X> Jymmm, u buy that scope for 900?
[23:08:51] <jimbo655> I use a HP Agilent 16700A logic analyser with 2 channel scope card. My dispaly is any Xwin system that I can connect to it. Runs Unix
[23:10:32] <Gamma-X> jimbo655, I want a picture of this
[23:10:36] <Gamma-X> and a wright up!
[23:14:42] <jimbo655> You can see them on ebay..
[23:19:17] <jimbo655> tough crowd....
[23:20:47] <PCW> Geo1005 I dont think so but I'm no expert, DC loads on individual phases has got to be bad
[23:23:35] <jimbo655> Gamma-X: did you figure out the resistance and wattage that you need for your braking resistor?
[23:23:52] <Gamma-X> kinda
[23:24:01] <jimbo655> What is it?
[23:24:18] <Gamma-X> 2.2kw
[23:24:51] <jimbo655> That is not enough.... What is the control and model number?
[23:24:55] <Gamma-X> 3hp motor, and I want it to be able to stop the spindle on a dime
[23:25:12] <Gamma-X> hitachi sj200
[23:26:06] <jimbo655> Do you have a spindle brake?
[23:26:49] <Gamma-X> air powered yes.
[23:27:05] <Gamma-X> but not hooked up,
[23:27:06] <Gamma-X> atm