#emc | Logs for 2007-04-09

[02:07:20] <tomp> hello, reading back, the graphite-carbon platen is not the edm material, it is the material used in fishing rods, a light hard slick reinforced 'plastic' ( sort of like frp )
[02:09:08] <tomp> and golf clubs handles... rifle stocks, stealth jets...
[02:09:15] <toastydeath> carbon fiber
[02:09:21] <tomp> yep
[02:09:24] <toastydeath> what about it
[02:09:55] <tomp> some one suggested it was the edm material 'graphite' , no no no
[02:10:07] <toastydeath> lol
[03:04:52] <a-l-p-h-a> Anyone work with openoffice.org?
[03:05:17] <SWPadnos> "work with" as in use, or "work with" as in develop?
[03:06:05] <a-l-p-h-a> use
[03:06:12] <SWPadnos> yes
[03:06:12] <a-l-p-h-a> RE: CALC, I want to deal with a column of data. If a cell has data, I want it to be valued at 15 minutes. So if there are 4 rows in a given column, it would be 60 minutes, or 1hr. How would I go about doing this?
[03:06:19] <CIA-19> 03cradek 07TRUNK * 10emc2/src/hal/components/oneshot.comp: dallur needs this to be a pin, and it seems like a good idea
[03:06:31] <a-l-p-h-a> I'm making a time sheet essentially.
[03:06:39] <a-l-p-h-a> so, if a cell has data... it's worth 15 minutes of time.
[03:06:46] <a-l-p-h-a> if it has nothing, it's valued at 0.
[03:06:52] <SWPadnos> do a database lookup (DCOUNT, I think), and multiply the result by 15
[03:07:12] <SWPadnos> yuo'll need to look up exactly how to do the selection criteria block
[03:09:06] <a-l-p-h-a> thanks!
[03:09:50] <SWPadnos> sure. I hope that actually works ;)
[03:10:22] <a-l-p-h-a> SWPadnos, it does!
[03:10:28] <SWPadnos> cool
[04:09:58] <eric_u> what is the command for open office draw from the command line?
[04:10:35] <tomp> oodraw
[04:11:56] <tomp> we use pastebin for text, imagebin for pix, drawblog for sketches, whats good for binaries?
[04:12:19] <eric_u> tomp, thanks
[04:12:25] <tomp> np
[04:23:57] <eric_u> do I have to download a source package for emc?
[04:24:13] <eric_u> doesn't come with the standard live cd?
[04:24:34] <SWPadnos> if you download the EMC2 livecd from linuxcnc.org, then you don't have to install
[04:24:38] <SWPadnos> or compile
[04:24:58] <eric_u> the reason I wanted it was to take a figure from one of the manuals
[04:25:04] <SWPadnos> if you downloaded a normal Ubuntu liveCD (and installed to HD), then you can install just by adding the emc2 repository to your repository list (still no compiling needed)
[04:25:23] <SWPadnos> hmm
[04:25:58] <SWPadnos> you may be able to get it from cvs.linuxcnc.org - maybe somewhere in the docs subdirectory under emc2, or in the documentation module
[04:26:28] <eric_u> there is no source package then?
[04:26:44] <SWPadnos> there is one
[04:26:58] <SWPadnos> apt-get source emc2, I think
[04:27:15] <SWPadnos> but you need to have the emc2 repository in your list
[04:30:21] <eric_u> had to install dpkg-dev too, but I got it, thanks
[04:30:34] <SWPadnos> np
[05:13:40] <a-l-p-h-a> tomp what's drawblog?
[05:14:08] <a-l-p-h-a> nm
[05:14:09] <a-l-p-h-a> :)
[05:14:48] <a-l-p-h-a> tomp, how big of a binary? there's those cheese download sites, where they make you wait 60 seconds before you get to download. HATE those.
[05:14:55] <a-l-p-h-a> but they are available.
[05:15:38] <tomp> a-l-p-h-a: i'm making a wiki page about the new hal circuit drawing with gEDA, and will post the tbz2 file there
[05:16:12] <tomp> a-l-p-h-a: drawblog is a place to sketch an idea for others to see
[05:16:27] <a-l-p-h-a> I see. :)
[05:17:05] <a-l-p-h-a> such a nice pic. <img src='http://www.drawblog.com/images/20070408101627187.jpg' usemap=#20070408101627187 border=0>
[05:17:11] <a-l-p-h-a> :) I'm uber at it.
[05:17:29] <tomp> http://www.drawblog.com/
[05:17:52] <tomp> yep that place
[05:18:27] <tomp> a new meaning of the word uber that i was previously unaware of :)
[05:21:09] <a-l-p-h-a> tomp check this out http://www.sharelor.com/
[05:21:31] <a-l-p-h-a> not an easy to use dump site, but is free.
[05:21:38] <a-l-p-h-a> 200 megs to toss around.
[05:22:40] <a-l-p-h-a> I have strongspace... so I need not those types of things.
[05:23:13] <tomp> how can they offer that for free? anyway i'm almost set with the wiki page already, thanks
[05:23:23] <a-l-p-h-a> heh
[05:23:23] <a-l-p-h-a> okie.
[05:23:34] <a-l-p-h-a> tomp, adverts?
[05:53:46] <eric_u> how do you make a large drawing in open office draw?
[05:54:00] <Jymmm> a LARGE drawing?
[05:54:06] <tomp> hal schematic with gEDA, new component library available ( very preliminary) http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?HalSchematicsUsingGschem
[05:54:07] <eric_u> when I change the paper size of the printer, it doesn't stick
[05:54:20] <tomp> suza
[05:54:22] <Jymmm> from within OO ?
[05:54:25] <tomp> scuza
[05:54:26] <eric_u> yes
[05:55:55] <eric_u> that hal setup for plasma was drawn in OO-Draw iirc
[05:56:06] <tomp> true
[05:56:22] <eric_u> did you do that tomp?
[05:56:24] <tomp> Rugludallur did it
[05:56:34] <tomp> very pretty
[05:57:54] <eric_u> I can't even get it to change to landscape
[05:58:52] <eric_u> ok, so reading the help would have actually helped
[06:01:46] <tomp> the file Rugludallur created ( the .odg ) doesnt know about the printer, so you must look in the oodraw app for help, sorry :( i just loaded it.
[06:02:20] <eric_u> sorry, I figured it out, format->page can change paper size
[06:02:35] <tomp> cool
[06:02:51] <tomp> gnite all
[06:02:59] <eric_u> good night
[06:13:20] <Jymmm> for the record, I'm not impressed with OO too much, can be a pita and buggy
[08:03:39] <Jymmm> ***** Belt Sanders review http://www.toolsofthetrade.net/articles/showarticle.asp?articleID=1866&position=0&type=article
[09:00:30] <anonimasu> morning
[13:26:09] <alex_joni> hi all
[13:39:43] <SWPadnos> I guess you scared them off
[13:49:23] <cradek> Support the NRA with an American Cellars Wine Club Membership through The NRA Wine Club. ... Each is hand-selected exclusively for NRA Members. And each helps defend your basic freedoms including your Right to Keep and Bear Arms.
[13:49:42] <SWPadnos> is that "Wines for target practice"? :)
[13:49:49] <cradek> (spam from nranews.org which does seem to be owned by the nra)
[13:50:01] <SWPadnos> "this bottle shatters real good"
[13:50:10] <cradek> haha
[13:50:28] <cradek> and this bottle defends my basic freedoms too
[13:50:45] <SWPadnos> heh
[13:51:58] <alex_joni> how's the weather over there?
[13:51:59] <alex_joni> still snowy?
[13:52:07] <cradek> cold but no snow yet here
[13:52:15] <alex_joni> it's warm & sunny here
[13:52:22] <alex_joni> think I'll hit the icecream stand
[13:52:27] <SWPadnos> less than inch of accumulation here
[13:52:36] <alex_joni> 18C and sun outside
[13:52:48] <SWPadnos> 1C and cloud outside
[13:52:53] <alex_joni> yuck
[13:53:04] <SWPadnos> springtime, don'tcha know
[13:53:31] <SWPadnos> chance of snow today and tomorrow, and again on Thursday and Friday
[13:53:43] <alex_joni> weell.. that sucks imo :P
[13:53:51] <alex_joni> bbl my bike wants a ride in the _SUN_
[13:54:01] <SWPadnos> luckily, I'll be heading for Las Vegas on Monday, so it won't matter much ;)
[13:54:12] <SWPadnos> have fun
[13:54:13] <cradek> -1C and cloud outside
[13:55:46] <SWPadnos> that's probably what's coming here for Thur/Fri
[14:10:04] <cradek> http://www.newsnet5.com/news/11566204/detail.html
[14:10:45] <SWPadnos> bummer
[14:25:01] <tomp> good morning, hal schematic with gEDA, new component library available ( very preliminary) http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?HalSchematicsUsingGschem
[14:25:48] <SWPadnos> cool
[15:27:45] <lerman_> lerman_ is now known as lerman
[15:55:48] <anonimasu> I need more spindle speed.
[15:56:20] <alex_joni> * alex_joni passes anonimasu 2 more rpm's
[15:56:59] <anonimasu> I need 8krpm
[15:57:02] <anonimasu> alu is so slow :)
[15:57:12] <anonimasu> with that I'll be cutting at 429mm/min
[15:57:22] <anonimasu> 6x5mm cuts
[15:57:57] <anonimasu> 2 flute cutter that is :)
[15:58:19] <alex_joni> so.. I have a board from a water heater.. got the partnumber on it (from honeywell) can't find sh*t on the web
[15:59:52] <anonimasu> stupid cam app.
[16:22:05] <lerneaen_hydra> 'lo
[16:32:23] <alex_joni> hi
[16:41:06] <feoc> gday!
[16:42:19] <alex_joni> hello feoc
[16:45:25] <feoc> hows it oing
[16:45:26] <feoc> going
[16:45:34] <alex_joni> pretty good
[16:46:05] <feoc> been trying to read up on this PID stuff over the easter break
[16:46:15] <feoc> not getting my head around it too easy
[16:46:18] <alex_joni> :-)
[16:46:37] <feoc> gotta admit i dont really know where to start in regards to setting up my mill :(
[16:46:50] <alex_joni> feoc: I would start with X
[16:47:01] <alex_joni> keep messing with PID until the axis works ok
[16:47:10] <alex_joni> ferror should be fairly small
[16:47:10] <feoc> mess with it how ?
[16:47:29] <alex_joni> feoc: start with the method described in the docs
[16:47:53] <feoc> in the manual or on the wiki ?
[16:47:59] <alex_joni> manual
[16:48:23] <alex_joni> ziegler-nichols
[16:48:39] <feoc> k
[16:48:41] <alex_joni> http://www.linuxcnc.org/docs/2.1/html/motion/pid_theory/index.htmlhttp://www.linuxcnc.org/docs/2.1/html/motion/pid_theory/index.html
[16:49:01] <alex_joni> or even the simple method
[16:49:21] <alex_joni> but no matter what you use.. always write down your observations and params
[16:49:28] <alex_joni> change only one at a time, and observe the outcome
[16:49:44] <alex_joni> otherwise you'll never make it work..
[16:49:56] <feoc> ok
[16:50:11] <feoc> i can set it up from inside emc?
[16:50:26] <feoc> or do i have to use a hal util ?
[16:51:22] <alex_joni> you can probably start emc2
[16:51:31] <feoc> emc just comes up with a following error and not much info other than that
[16:51:32] <alex_joni> then use a terminal and halcmd setp pid.0.gain 100
[16:53:26] <feoc> whats the best way to test it ?
[16:53:36] <feoc> just jog in emc
[16:53:37] <feoc> ?
[16:53:47] <chron1c> howdy
[16:54:13] <alex_joni> feoc: no, the method in the docs assumes the axis stands stil..
[16:54:42] <feoc> ah right
[16:55:11] <alex_joni> at least what the command is concearned
[16:55:17] <chron1c> i got my machine working! (almost)
[16:55:21] <chron1c> it's tiny
[16:55:22] <alex_joni> chron1c: nice
[16:55:27] <feoc> how do i know if it setup or not ?
[16:55:36] <feoc> unless you move it
[16:55:38] <alex_joni> feoc: you start increasing the gain (P)
[16:55:43] <chron1c> it's got like 3.5 or 4" by 12 of travel only :(
[16:55:49] <alex_joni> untill it starts to vibrate (oscilate)
[16:55:58] <alex_joni> then you set up I and D
[16:56:05] <feoc> what vibrates?
[16:56:09] <feoc> the motor?
[16:56:13] <alex_joni> at this point it should be moveble
[16:56:15] <alex_joni> feoc: yes
[16:56:18] <feoc> ah
[16:56:48] <feoc> what is it that causes the ferror to start with?
[16:56:59] <feoc> if the control has the encoder readings?
[16:57:01] <chron1c> hey i gotta go back to work now... ill be back later. thanks for emc!
[16:57:53] <alex_joni> feoc: ferror means the distance between commanded and readback value is too big
[16:58:06] <alex_joni> e.g. motor lagging behind, moving too far away
[16:58:54] <feoc> ah right
[16:59:45] <alex_joni> but it can also mean you wired the encoder backwards
[17:00:14] <feoc> i dont think i did
[17:00:22] <feoc> i can move in small increments ok
[17:00:35] <feoc> its the larger ones that cause ferror
[17:00:43] <feoc> i tryed reversing it and got no movemet at all
[17:01:50] <feoc> right gotta dash
[17:01:55] <feoc> ill be back later/tommorow
[17:02:12] <alex_joni> have fun
[17:02:13] <feoc> got all week off to get this mill sorted :)
[17:02:20] <cradek> feoc: good, pid tuning can take a lot of patience!
[17:02:22] <feoc> cheers
[17:02:39] <feoc> cradek :(
[17:02:57] <cradek> I think it's fun...
[17:02:58] <feoc> i dont mind patience if i know im doing it right
[17:03:02] <feoc> i just feel a bit lost with it tbh
[17:03:27] <cradek> did you read about zeigler-nichols?
[17:03:43] <feoc> well theres only about a paragraph in the manual about it
[17:03:47] <feoc> with the table
[17:03:55] <cradek> ah, more is online probably
[17:04:10] <cradek> the basic idea is to find a P-only gain where you just get oscillation
[17:04:24] <cradek> then you time the oscillation
[17:04:40] <cradek> then you have some initial settings that work
[17:05:17] <feoc> okie
[17:05:19] <feoc> il bbl
[17:05:22] <feoc> dinner time
[17:05:23] <feoc> cheers
[17:05:32] <cradek> ok bye
[17:22:14] <SWPadnos__> SWPadnos__ is now known as SWPadnos
[18:12:16] <jackc> jackc is now known as crepincdotcom`
[19:05:20] <anonimasu> hm..
[20:10:35] <chron1c> yo what's up?
[20:10:49] <cradek> hi
[20:11:11] <chron1c> anyone feel like helping a po' brotha out?
[20:11:28] <chron1c> lol...i got my machine kinda-working
[20:11:37] <chron1c> i need to tweak the ini and hal files i guess now?
[20:11:58] <cradek> kinda working is a good first step
[20:12:06] <chron1c> what i am working with is a p2 333, ubuntu live installed to HD
[20:12:15] <alex_joni> cradek: something fun to see: http://steampunkworkshop.com/telegraph.shtml
[20:12:20] <cradek> what specifically do you need to do to get it fully working?
[20:12:20] <chron1c> a SP3 controller xcard
[20:12:36] <chron1c> i have it all wired and i can jog the motors with the keyboard
[20:12:47] <cradek> great
[20:12:51] <chron1c> but when i turn the feedrate up p[ast 5 it won't move
[20:12:55] <chron1c> it just shudders
[20:13:01] <cradek> is SP3 xcard some kind of step/direction driver?
[20:13:07] <chron1c> sp3
[20:13:25] <chron1c> i gotta look up who makes it
[20:13:39] <alex_joni> sounds like you have accel too high
[20:13:40] <cradek> what is it? stepper driver box?
[20:13:53] <chron1c> i've had it for like 4 years i jsut now got around to using it
[20:14:00] <chron1c> it is a 3 axis stepper drive
[20:14:01] <cradek> yeah you have to find the velocity and acceleration settings that work well for your setup
[20:14:06] <cradek> ok
[20:14:19] <alex_joni> chron1c: start with low accel and low max speed
[20:14:24] <chron1c> stepperworld.com
[20:14:28] <alex_joni> the gradually increase speed
[20:14:28] <cradek> steppers lose power as you try to turn them faster - you have to find the right settings by experimenting
[20:14:34] <chron1c> but they don't sell this partcular model anymore
[20:14:44] <alex_joni> after you got a speed you're happy with increase accel
[20:14:46] <chron1c> low accel would be in the ini files?
[20:14:51] <alex_joni> chron1c: yeah
[20:15:00] <chron1c> hmm
[20:15:02] <alex_joni> MAX_VELOCITY = 1.2
[20:15:03] <alex_joni> MAX_ACCELERATION = 20.0
[20:15:11] <chron1c> i am using 5.1 volt 1.8 degree steppers
[20:15:22] <chron1c> they are 1:1 on the ballscrew slides
[20:15:23] <alex_joni> that's in user units / second (and /second^2)
[20:15:28] <chron1c> should i be using gears?
[20:15:32] <alex_joni> powered from what voltage?
[20:15:48] <chron1c> 5.1 volt atx power supply?
[20:15:56] <alex_joni> oh.. there's your problem :)
[20:16:00] <chron1c> hmm
[20:16:05] <chron1c> power supply?
[20:16:11] <alex_joni> steppers usually need 10-20 times the rated power supply
[20:16:15] <chron1c> hmmm
[20:16:19] <alex_joni> I run mine at 40V or so
[20:16:26] <chron1c> really?
[20:16:29] <alex_joni> btu you need a stepper driver with current limiting
[20:17:03] <alex_joni> I suggest you read this paper: http://www.geckodrive.com/photos/Step_motor_basics.pdf
[20:17:10] <chron1c> i will read it
[20:17:45] <cradek> running 5v steppers at 5v will work if you move very slowly :-)
[20:18:18] <chron1c> so i shouldn't expect more than the 5 ipm?
[20:18:24] <chron1c> with my setup?
[20:18:32] <cradek> hard to say, but maybe not
[20:18:55] <chron1c> hmm.. i need a cnc guru close to dayton ohio...
[20:19:00] <cradek> if your scale is wrong, that 5ipm number will be wrong too
[20:19:04] <cradek> did you set the scale yet?
[20:19:04] <chron1c> emc/cnc*
[20:19:13] <chron1c> i haven't set anything really
[20:19:19] <chron1c> i just got it all wired last night
[20:19:32] <chron1c> and decided to see if the default stepper ini would do anything
[20:19:35] <cradek> ok for the scale you have to calculate how many steps it takes to go one inch (or mm)
[20:19:36] <chron1c> so that's where i am at
[20:19:41] <cradek> ok
[20:19:42] <chron1c> ohh..
[20:19:52] <chron1c> so i should bring my indicator home from work?
[20:19:54] <cradek> only after you set the scale will the numbers be right
[20:20:00] <chron1c> i see...
[20:20:02] <cradek> do you know the pitch of your leadscrews?
[20:20:18] <chron1c> i need to figure out the ballscrew pitch.. then the step degrees... then do math
[20:20:24] <cradek> exactly
[20:20:33] <chron1c> ok...
[20:20:42] <chron1c> i hadn't got that far yet into the documentation
[20:20:56] <chron1c> i am learning a lot as this project goes, it's a lot to take in at once
[20:21:05] <alex_joni> chron1c: please make notes where you find the documentation scarse
[20:21:12] <cradek> yes that would be nice
[20:21:32] <cradek> we could always use documentation help, especially docs for beginners
[20:21:37] <chron1c> i am going to take pics and make a project page for my machine
[20:21:38] <alex_joni> it's always hard for people who already know this things to check what's missing
[20:21:46] <cradek> for some time we've talked about writing a "quickstart" guide
[20:21:46] <alex_joni> s/this/these/
[20:21:52] <chron1c> i wanted to at least know it was going to work before i did all that though
[20:22:09] <alex_joni> chron1c: I'm happy it's moving at all
[20:22:13] <chron1c> i found the current documentation to be pretty adequate
[20:22:19] <alex_joni> cradek: seen that link?
[20:22:24] <chron1c> but.. i am sort of a genius lol
[20:22:32] <cradek> alex_joni: yes, that's neat, he does nice things with very basic tools
[20:22:47] <cradek> chron1c: aren't we all
[20:23:23] <alex_joni> Jymmm: http://steampunkworkshop.com/telegraph.shtml
[20:23:34] <chron1c> yes, the steampunk is some cool stuff
[20:23:42] <chron1c> i found it on hackaday
[20:23:46] <cradek> he's an emc user
[20:23:50] <cradek> (I think)
[20:23:57] <chron1c> he does beatiful work
[20:24:41] <cradek> the brass one reminds me of homebrew '20s radios
[20:24:41] <chron1c> i have ran prototrak's and milltronics controls...
[20:24:51] <chron1c> i am anxious to make a part with emc
[20:25:17] <chron1c> i ran a hurco control for a few minutes once
[20:25:22] <chron1c> also*
[20:25:36] <chron1c> emc seem really intuitive compared to them
[20:25:48] <cradek> that's good to hear
[20:25:49] <chron1c> easier to work with
[20:25:52] <chron1c> *
[20:26:11] <cradek> especially the AXIS gui was intended to be familiar/easy for computer users
[20:26:34] <chron1c> if i was to scrap my current stepper setup and go servo... what would be a cheap way to go for a mini mill?
[20:26:35] <cradek> some of the other guis are intended to be familiar/easy for users used to other controls
[20:26:43] <cradek> lots of options
[20:27:01] <cradek> chron1c: depends what you mean by cheap
[20:27:10] <chron1c> the blue interface is what i was using last night... is that tkemc?
[20:27:11] <chron1c> it's nice
[20:27:17] <cradek> yes it's tkemc
[20:27:19] <chron1c> i haven't got to try axis yet
[20:27:29] <cradek> for fun, also try AXIS
[20:27:29] <chron1c> looks pretty
[20:27:31] <cradek> those are the two main ones
[20:28:25] <chron1c> i am trying to talk my boss into letting me do a cnc conversion on one of our older manual mills
[20:28:52] <chron1c> once i get my mini mill finished and tweaked i am sure they will give me money and tell me to go for it on the big mill
[20:29:05] <chron1c> i just gotta prove it works
[20:29:32] <cradek> it works :-)
[20:30:10] <cradek> we've got nice flexible support for hardwired controls, jog wheels, etc etc
[20:30:15] <chron1c> i know it does.. but not my 70 yr old ... super old school machinist boss doesn't
[20:30:16] <chron1c> lol
[20:30:29] <chron1c> he still usues a 20 foot planer
[20:30:42] <chron1c> i told him we could even turn it into cnc
[20:31:15] <chron1c> i can't wait till i can dive into the hal programming and getting things like the jogwheels setup
[20:31:45] <cradek> in early june we're meeting at cnc workshop in IL - not too far from you
[20:31:49] <chron1c> can emc/hal interface to the spc on calipers for a ghetto encoder?
[20:32:02] <alex_joni> http://steampunkworkshop.com/keyboard.shtml
[20:32:05] <chron1c> i would love to come check the meeting out
[20:32:13] <cradek> lots of neat cnc stuff there
[20:32:31] <cradek> including a huge mazak with toolchanger the emc team has retrofitted
[20:32:39] <chron1c> i have been drooling over all you guy's pics on the website
[20:32:52] <cradek> oh hey, that's a little personal
[20:32:55] <cradek> hahaha
[20:32:59] <alex_joni> hahaha
[20:33:05] <chron1c> uhh you guy's MACHINE's pics
[20:33:06] <chron1c> lol
[20:33:07] <alex_joni> chron1c: you're into bearded guys?
[20:33:13] <alex_joni> lol
[20:33:21] <cradek> bearded + balding
[20:33:32] <chron1c> i'm into 18 yr old blondes with huge jugs
[20:33:36] <chron1c> not bearded guys
[20:33:36] <chron1c> lol
[20:33:39] <alex_joni> close enough
[20:33:46] <cradek> well hey to each his own
[20:34:02] <cradek> more bearded guys for me
[20:34:09] <chron1c> bearded guys seem to be smarter than the 18 yr old blondes but not as much fun in the sack
[20:34:38] <chron1c> anyways...
[20:34:39] <cradek> so you're a machinist for work and have a mini mill at home?
[20:34:40] <chron1c> lol
[20:34:50] <chron1c> well, i am a machinist
[20:34:59] <chron1c> i work for burton antique auto parts
[20:35:07] <chron1c> and b&b reproductions
[20:35:10] <cradek> cool
[20:35:15] <chron1c> burtonantiqueautoparts.com
[20:35:42] <chron1c> and i have three ballscrew precision slides i salvaged from a machine we built at another shop i used to work at
[20:35:49] <chron1c> and i bolted two together
[20:35:53] <chron1c> for an x/y
[20:36:07] <chron1c> and i have the third that i need to mount on the mini drill press i gutted
[20:36:21] <chron1c> which will be mmy m,ini mill when i get it together
[20:36:28] <chron1c> :D
[20:36:38] <alex_joni> cradek: haha, here's how you should make a watch http://steampunkworkshop.com/electro-mach.shtml
[20:37:14] <chron1c> i still haven't attached the x/y or z to the mini drill press
[20:37:29] <chron1c> but it's going to work nice for the head support
[20:38:13] <cradek> alex_joni: I don't understand that thing - too much art and not enough machining for me maybe
[20:38:18] <chron1c> i used cat5 cable to wire the motors to the stepper driver... which is all laid out on my bench right now
[20:38:28] <chron1c> i need to make a driver box and mount it on the machine
[20:38:56] <cradek> chron1c: do you guys make parts for these old cars in your shop?
[20:39:15] <chron1c> yes sir
[20:39:22] <cradek> neat
[20:39:26] <chron1c> it's a lot of fun
[20:39:43] <chron1c> we have a few presses and a 1913 planer
[20:40:00] <chron1c> and a huge stack of dies we can swap out to make whatever part
[20:40:01] <cradek> I've got a '52 chevy, no rust, pretty much original, runs nice and uses no oil yet
[20:40:06] <chron1c> oh, a couple brake presses
[20:40:08] <cradek> oh body parts? wow
[20:40:22] <Jymmm> alex_joni: Wow! That's pretty cool, and the morse is pretty clean sounding and easy to read.
[20:40:21] <chron1c> we don't do body parts
[20:40:25] <chron1c> we could though
[20:40:33] <cradek> ah I see
[20:40:36] <chron1c> but it's a lot of fancy stainless trim
[20:40:43] <cradek> gotcha
[20:40:46] <chron1c> like rockers
[20:40:48] <chron1c> and washboards
[20:40:54] <chron1c> rear finish trim for galaxies
[20:41:09] <chron1c> we just finished a 59 rocker
[20:41:13] <chron1c> might fit your 57 ;)
[20:41:20] <chron1c> it's beautiful
[20:41:22] <cradek> 52 here
[20:41:25] <chron1c> and better than the orig
[20:41:30] <chron1c> oh 52
[20:41:31] <cradek> I need my bumpers chromed...
[20:41:52] <chron1c> hmm...
[20:41:54] <cradek> actually I need to sell the car to someone who will fix it up - I've had it for 5 years and haven't done much
[20:42:08] <cradek> it was a daily driver for about a year
[20:42:09] <chron1c> i got a grand in the bank?
[20:42:44] <chron1c> wanna sell it for a $1,000
[20:43:02] <chron1c> yes only a grand in the bank...
[20:43:06] <chron1c> i buy too many toys
[20:43:29] <cradek> I might think about it if you said $2k
[20:43:29] <alex_joni> http://steampunkworkshop.com/cnc-ecm.shtml
[20:43:50] <cradek> it's a nice survivor - kept running but unmolested
[20:44:22] <cradek> I could drive it to IL in june - that'd be a blast
[20:44:28] <alex_joni> "I'll use LinuxCNC.org's EMC2 software to control the operation of the machine. EMC2 supports a variety of drivers, both stepper and servo, and appears to be the most popular of the OpenSource CNC projects."
[20:45:15] <chron1c> what kind of machines do you guys have running emc?
[20:45:31] <cradek> I have a small mill and lathe
[20:45:52] <chron1c> ahh the sherline kind of small?
[20:46:00] <chron1c> or bridgeport small?
[20:46:07] <cradek> the mill is a little bigger than a sherline, the lathe is (was) a sherline
[20:46:31] <cradek> no, I have my eyes out for a "bridgeport small" machine though
[20:47:07] <chron1c> sweet
[20:47:23] <chron1c> i am really interested in building a smal lathe
[20:47:37] <chron1c> i would like it to be manual/cnc
[20:47:47] <chron1c> but i should finish this mil first
[20:47:48] <lerneaen_hydra> how small is small?
[20:48:20] <chron1c> well the 7 x 10 cheap china lathes looks like a good starting point
[20:48:23] <cradek> a threadcutting lathe is complex if you want manual operation - with cnc you get threadcutting almost for free (no gearing)
[20:48:26] <alex_joni> I have a smaller than sherline mill
[20:48:43] <Jymmm> Well crap... Did a sign in 1" thick acrylic, and when I rad a seconds pass (to cleanup the swarf) the X axis jumped .015", so now there's a "ghost" image (so to speak) ARGH!!!!!!
[20:49:08] <chron1c> chalk it off as art jymmm, lol
[20:49:16] <alex_joni> http://dsplabs.cs.utt.ro/~juve/emc/mycnc/10070328/PICT0003.JPG
[20:49:17] <cradek> yeah charge extra!
[20:49:31] <alex_joni> lerneaen_hydra: that small
[20:49:48] <Jymmm> chron1c: I wish I could, but all these snafu's are getting expensive (raw material wise).
[20:49:56] <chron1c> looks nice alex
[20:50:08] <anonimasu> Jymmm: why did it jump ?
[20:50:15] <lerneaen_hydra> alex_joni: oh, tiny
[20:50:34] <Jymmm> anonimasu hell if I know, had the feed speed low too... 20 IPM
[20:50:42] <chron1c> that's about the size of my machine
[20:51:00] <chron1c> i will only have 2.5 - 3.5 inches of y travel though :(
[20:51:14] <chron1c> looks like i will be doing a lot of rings :D
[20:52:15] <cradek> I think lots of folks make jewelry with machines that size
[20:52:36] <chron1c> anyone ever used artcam?
[20:52:49] <alex_joni> I used it once..
[20:53:01] <alex_joni> this guy is really nuts: http://www.vonslatt.com/bus-main.shtml
[20:54:07] <chron1c> lol that's crafty
[20:57:33] <anonimasu> hm
[20:57:39] <anonimasu> hm, like the race-bus we had..
[21:17:37] <alex_joni> good night all
[21:23:35] <chron1c> peace out yo
[21:23:37] <feoc> gnight
[21:28:13] <mschuhmacher> night
[21:37:09] <feoc> There are several methods for tuning a PID loop. The choice of method will depend largely on whether or not the loop can be taken "offline" for tuning
[21:37:19] <feoc> what does take offline mean ?
[21:41:36] <mschuhmacher> feoc: where did you read this?
[21:44:17] <chron1c> ehh i'm going to the linux box downstairs to play with my machine... thanks for the tips folks!
[21:55:38] <feoc> http://www.linuxcnc.org/docs/2.1/html/motion/pid_theory/index.html
[21:57:38] <ejholmgren> race bus?
[21:57:54] <ejholmgren> like the school bus that pulls a 1/4 mile wheelie at the track?
[21:59:55] <anonimasu> hehe, like living space..
[22:21:01] <mschuhmacher> http://www.learncontrol.com/tutorial/pid6.html
[22:24:07] <chr0n1c> word uup
[22:24:16] <chr0n1c> i''m on my machine box now
[22:25:14] <chr0n1c> i was wondering if someone could point me to the formula for figuring out my input scale (9ballscrews/motor steps)
[22:26:27] <chr0n1c> fyi it's a 5tpi ballscrew and a 1.8 degree/step motor ran 1:1 with aa shaft coupler
[22:26:56] <chr0n1c> brb gonna change the keyboard repeat rate
[22:26:56] <cradek> so that's 200 steps per rotation, and a rotation is 1/5th inch
[22:27:05] <cradek> so 1000 steps/inch right?
[22:27:19] <chr0n1c> hmm.. i'm not big on the math
[22:27:33] <chr0n1c> if i ahve a formula i can figure it out?
[22:27:44] <chr0n1c> would it be ini the emc docss?
[22:28:32] <cradek> I'm not sure how to write a formula that would make it easier
[22:28:55] <cradek> I just used 360degrees/1.8degrees = 200 steps per turn
[22:29:02] <chr0n1c> a step would be a 1/5th inch?
[22:29:06] <cradek> and that goes 1/5th inch
[22:29:08] <chr0n1c> aka 200 thousandths
[22:29:11] <cradek> no, a turn (200 steps) goes 1/5th inch
[22:29:16] <cradek> right
[22:29:17] <chr0n1c> hmm
[22:29:24] <cradek> so 5 turns (an inch) is 1000 steps
[22:29:40] <cradek> so your scale is 1000
[22:29:52] <chr0n1c> ok...thanks
[22:29:58] <chr0n1c> i think i'm catching on
[22:30:03] <cradek> welcome
[22:30:11] <chr0n1c> now my y balscrew is different...
[22:30:18] <chr0n1c> i need to measure it and count still
[22:30:19] <cradek> no problem
[22:30:29] <cradek> ok you do that one :-)
[22:30:39] <cradek> emc doesn't care whether they are the same
[22:32:05] <chr0n1c> 10 tpi.... 1.8 deg a step = 500?
[22:32:09] <chr0n1c> or 2000
[22:33:18] <chr0n1c> trail and error is what i do best lol
[22:34:17] <cradek> yep I agree it's one or the other!
[22:34:30] <cradek> this one will require more or less turns to go an inch?
[22:36:49] <chr0n1c> more turns
[22:36:50] <chr0n1c> ;)
[22:36:53] <cradek> right
[22:36:56] <chr0n1c> aye
[22:37:10] <chr0n1c> i was editing that one to try first
[22:37:23] <chr0n1c> faster crashes are more fun anyways
[22:49:37] <chr0n1c> so it''s working better
[22:50:15] <chr0n1c> jogging with the kkeyboard is choppy bet runing the axis 2 demo code works very nice
[22:50:25] <chr0n1c> i need to configure limit switches though :D
[23:05:35] <chr0n1c> woohoo... fun fun
[23:06:10] <chr0n1c> i wonder if a temporary motor coupler made out of this cracy clear plastic i have would work?
[23:06:18] <chr0n1c> i could make it with my cordless drill
[23:06:37] <chr0n1c> crazy *
[23:35:05] <eric_u> is Anders Wallin ever on here?
[23:35:16] <anonimasu> yes
[23:35:19] <anonimasu> "awallin"
[23:35:42] <eric_u> thanks
[23:36:21] <eric_u> I'm staring at his schematic
[23:37:50] <eric_u> the mesa m5i20 doesn't do step/dir yet, correct?
[23:40:24] <eric_u> I like Anders Estop chain except his schematic needs help on the relay representation
[23:50:04] <Jymmm> eric_u: I haven't seen it,, but how so?
[23:50:32] <eric_u> you have to figure out which is the coil and which is the contacts by reverse engineering
[23:50:54] <Jymmm> eric_u you cna use any DPDT relay
[23:50:57] <chr0n1c> ok so i stuck an ink pen into my chuck and ran the axis demo g-code and my y axis is upside down? it wrote EWC instead of EMC
[23:51:06] <cradek> haha
[23:51:22] <cradek> chr0n1c: you can reverse an axis by making the scale negative
[23:51:34] <eric_u> no, I'm saying that you can't tell which side is the coil
[23:51:35] <Jymmm> I think Y acis in this case =)
[23:51:44] <Jymmm> eric_u url?
[23:51:53] <chr0n1c> ahh...
[23:51:54] <eric_u> I knew you were going to ask me that
[23:52:10] <chr0n1c> the same scal as the one i changed for the ballscrew pitch?
[23:52:11] <Jymmm> eric_u The relay ciruit is no big deal,
[23:54:19] <eric_u> he posted the url on the email list
[23:54:31] <Jymmm> I'm not on the mailing list.
[23:54:49] <chr0n1c> i have an mdf table (flat) attached to my y slide with 1 screw and a washer. i salvaged the screw out of an old circular saw case.. then had to cut it to length with my dremel... geesh, kinda ghetto
[23:55:00] <chr0n1c> wish i had a whole machine shop in my garage :(
[23:55:15] <eric_u> I do to, but it's in my basement instead :)
[23:55:36] <chr0n1c> i'm in my basement
[23:56:02] <chr0n1c> only sunlight is what comes down the stairs (not much) and my driveway/front porch camera/monitor
[23:56:07] <chr0n1c> lol
[23:56:17] <eric_u> is my machine shop down there with you, sometimes it goes on jaunts without my permission
[23:56:18] <chr0n1c> it's a lab/dungeon
[23:56:27] <chr0n1c> uhh no
[23:56:34] <eric_u> I work in two different basement labs
[23:56:38] <Jymmm> does it have a monster ?
[23:56:47] <chr0n1c> just me and my dremel and a ghetto (slowly coming to life) mini cnc mill
[23:56:47] <eric_u> someone once told me to call him up when I got an above-ground job
[23:56:56] <Jymmm> Every lab/dugeon should have a mascot monster
[23:56:57] <chr0n1c> it has spiders... i am the monster i guess
[23:57:11] <chr0n1c> actually it does have a mascot already
[23:57:13] <Jymmm> chr0n1c: Dr Jeckle I presume
[23:57:33] <chr0n1c> chronic the hodog (aka: sonic_the_hedgehog)
[23:57:49] <chr0n1c> my two alter egos?
[23:59:33] <chr0n1c> sorry, that wasn't about emc...
[23:59:46] <chr0n1c> can we strike it from the record?