#emc | Logs for 2005-08-01

[00:00:37] <Jacky^> GoogNight alex_joni
[00:00:51] <alex_joni> night Jacky^
[00:02:19] <steve_stallings> steve_stallings is now known as steves_logging
[00:03:13] <alex_joni> huh..
[00:03:23] <alex_joni> did you guys know that hexapod is trademarked?
[00:03:27] <alex_joni> " Trade Mark Notice: All trademarks acknowledged. According to Geodetic Technology they have obtained trademark number 2153930 for the use of the term 'hexapod' in a machine tool context"
[00:03:54] <Jacky^> never heard..
[00:04:19] <SWPadnos> what country?
[00:04:29] <alex_joni> US I think
[00:04:36] <SWPadnos> do you know how long ago?
[00:04:44] <alex_joni> nah.. UK
[00:04:56] <alex_joni> http://www.i-way.co.uk/~storrs/lme/LMEHexapodMachine.html
[00:04:56] <SWPadnos> yep - UK - googled
[00:06:08] <SWPadnos> that looks like a low number, but I can't be sure.
[00:06:21] <SWPadnos> they can't trademark it if it's been in general use beforehand
[00:07:03] <SWPadnos> (but then there's Windows, so what do I know?)
[00:07:03] <alex_joni> http://www.answers.com/topic/stewart-platform?method=5&linktext=Stewart%20platform
[00:26:02] <SWPadnos> SWPadnos is now known as SWP_Away
[00:39:56] <dpy> does this mean you cannot use the term hexapod for robots any longer ?
[00:43:51] <Jacky^> night
[01:55:19] <Jymmm> LOL UK located in Texas.... Brits would be so lucky!
[02:08:19] <Jymmm> I was only kidding
[02:21:10] <LawrenceG> hey Jymmm
[02:24:40] <Jymmm> hey LawrenceG
[02:25:05] <Jymmm> how goes it?
[02:39:32] <LawrenceG> sri... was watching the news .... was an interesting day with all the brains online!
[02:45:28] <Jymmm> lol
[02:46:32] <LawrenceG> pretty funny... there was a gay pride parade in Vancouver today... some pretty wild pictures
[02:47:02] <Jymmm> not really, we have theat here every year =)
[02:48:15] <LawrenceG> a good excuse to run wild in your underwear... they had a couple of Nuns flaunting their stuff
[02:48:17] <Jymmm> San Francisco Gay Pride PArade
[02:48:49] <LawrenceG> I prefer club med myself!
[02:48:58] <Jymmm> I gotta make it up to the next one early enough - with camera in hand
[02:49:22] <Jymmm> I probably need more cF cards too
[02:50:16] <LawrenceG> I finally found a circuit for a constant current source for unipolar steppers....
[02:50:39] <Jymmm> making your own driver huh? microstepping?
[02:50:49] <LawrenceG> http://pminmo.com/3axis/3axis.htm
[02:51:47] <LawrenceG> actually I was looking to adapt it to driving servos as a current limited drive
[02:51:51] <Jymmm> oh, needs big old fat resistors
[02:52:31] <LawrenceG> check down a little lower.. that is the chopper to eliminate the big fat resistors
[02:52:51] <LawrenceG> http://pminmo.com/3axis/3chprschematic.pdf
[02:53:19] <Jymmm> I remember seeing the site a ways back.
[02:55:03] <LawrenceG> someone posted it today and I just happened to look through it.... some of the stuff is a little questionable but most web stuff needs a little sanity check... good for ideas
[02:55:53] <Jymmm> ideas are good =)
[02:56:28] <LawrenceG> the web has so many ideas available it is hard to get anything done!
[02:57:10] <Jymmm> heh
[02:58:24] <LawrenceG> according to the emails I have been getting I must have won just about every lottery in europe
[02:58:50] <Jymmm> dont forget my 10%
[02:59:32] <LawrenceG> I need my bank manager to figure out how to empty their bank account!
[03:04:42] <LawrenceG> are you having good weather down there?
[03:15:21] <Jymmm> Yeah, warm too. I got the A/C on in here atm, but this room gets hot all year long.
[03:15:56] <Jymmm> It's takeing FOREVER to index these images!
[03:16:21] <LawrenceG> we are right on the edge of a front at the moment.... was clody and sunny all day... not rain, but we may get some tonight
[03:16:38] <Jymmm> no rain in site here
[03:19:45] <Jymmm> Eeeesh, at this rate it'll take me another two days to finish this up!
[04:10:16] <Yuga> hey all... long time no c
[06:39:34] <CIA-9> 03jmkasunich * 10emc2/src/emc/ (5 files in 2 dirs):
[06:39:34] <CIA-9> Added hooks to allow halscope to look at trajectory planner internals for
[06:39:34] <CIA-9> debugging. Also added some prints in an attempt to understand the code. The
[06:39:34] <CIA-9> prints and HAL hooks are temporary and will be removed later. Also revised and
[06:39:34] <CIA-9> added comments elsewhere.
[07:42:46] <anonimasu> morning
[08:14:20] <anonimasu> morning alex
[08:14:25] <alex_joni> morning
[08:14:30] <anonimasu> how's things going?
[08:14:33] <anonimasu> * anonimasu just woke up
[08:14:37] <anonimasu> well 1 hour ago..
[08:14:40] <alex_joni> I woke up a while ago
[08:14:42] <anonimasu> I am still on my way to work ;)
[08:14:45] <alex_joni> heh
[08:14:54] <anonimasu> been reading about hal..
[08:14:55] <alex_joni> I am at work.. but.. I yearn for my bed
[08:14:58] <alex_joni> yeah?
[08:15:00] <alex_joni> what?
[08:15:08] <anonimasu> curious about a USC driver
[08:15:34] <alex_joni> heh
[08:15:37] <alex_joni> write one :P
[08:15:46] <anonimasu> why else would I look at hal ;)
[08:15:51] <alex_joni> * alex_joni starts his devel box
[08:16:00] <alex_joni> not that hard.. (an USC HAL driver)
[08:16:22] <anonimasu> hal does not seem that complex
[08:16:33] <alex_joni> nah.. it's fairly easy
[08:16:36] <alex_joni> at least to work with it
[08:16:59] <anonimasu> I think the board will arrive today :
[08:17:00] <anonimasu> :)
[08:17:15] <anonimasu> I realized I can use the 4th axis as jog wheel input
[08:17:23] <anonimasu> if I'd like..
[08:18:13] <anonimasu> http://www.pico-systems.com/univstep_regs.html
[08:20:59] <alex_joni> you can use the parport for connecting an encoder to it
[08:22:32] <anonimasu> I dont know if it'll be fast enough
[08:22:49] <anonimasu> ah but it does not really matter if I cant get the machine to move
[08:22:50] <anonimasu> :D
[08:25:21] <anonimasu> I'll have a look at emc1 to see how they control the card there
[08:26:30] <anonimasu> hm time to go to work.. I'll be back from there instead
[08:58:36] <anonimasu> hello
[08:58:54] <alex_joni> 'lo
[09:00:29] <anonimasu> * anonimasu is making backups
[09:03:47] <alex_joni> wanna see smthg nice?
[09:03:52] <alex_joni> http://www.robocoaster.com/english/index2.html
[09:04:49] <anonimasu> LOL!
[09:04:50] <anonimasu> :D
[09:05:05] <anonimasu> 4.9m/sec
[09:08:10] <anonimasu> very nice
[09:09:13] <alex_joni> heh
[09:19:46] <anonimasu> *longs back home to bed*
[09:19:50] <anonimasu> I didnt get to finish my cup of tea :/
[09:20:03] <anonimasu> I am dead tired..
[09:20:13] <anonimasu> I read lots of that sonia paper yesterday :D
[09:20:22] <alex_joni> it's pretty ok
[09:20:25] <anonimasu> sonja..
[09:20:26] <anonimasu> yeah
[09:20:36] <anonimasu> it probably sucked the life out of me that's why I am tired today ;)
[09:21:21] <alex_joni> careful...
[09:22:21] <anonimasu> but today is a good day for coding
[09:23:36] <alex_joni> heh
[09:23:39] <alex_joni> I might agree
[09:23:59] <anonimasu> I've gotten lots of stuff done already
[09:24:22] <anonimasu> if this keeps up I'll have the memory hack implemented by afternoon..
[09:24:34] <alex_joni> coo
[09:29:53] <anonimasu> I am happy this language supports encapsulation of objects..
[09:30:07] <anonimasu> otherwise I'd have 6900 memory objects..
[09:30:20] <anonimasu> now I have 1 memory object per settings..
[09:30:45] <anonimasu> that contains 10 variables all their own object within..
[09:39:52] <anonimasu> http://www.laas.fr/~jpl/book-toc.html
[09:40:35] <alex_joni> not what emc needs
[09:40:39] <alex_joni> this is path planning
[09:40:42] <alex_joni> for mobile robots
[09:41:07] <anonimasu> yeah ;)
[09:41:19] <anonimasu> looking at the colission detection stuff
[09:41:22] <alex_joni> try this: http://robotics.jpl.nasa.gov/people/volpe/papers/icra93.pdf
[09:41:41] <anonimasu> way over my head probably
[09:44:27] <anonimasu> that apper seems nice also
[09:44:33] <anonimasu> will print it also :)
[09:45:26] <anonimasu> when you do 3d trajectory planning the only difference is that you limit the maximum acceelration/velocity of the faster axis:es to cope with the max speed of the slowest one right?
[09:46:02] <anonimasu> and then you calc acceleration/velocity for all 3 axis:es and you have interpolated motion
[09:46:06] <alex_joni> smthg like that
[09:46:22] <anonimasu> neat..
[09:48:46] <anonimasu> brb lunch
[09:53:00] <anonimasu> hm, tp calculates velocity vectors and tc takes care of calculation the velocity and acceleration
[10:04:09] <Jacky^> morning
[10:19:31] <Jacky^> hey Yuga
[10:19:37] <Yuga> hey there Jacky^
[10:19:42] <Jacky^> :)
[10:20:06] <Yuga> what's happened here the last few days? anything exciting?
[10:21:15] <Jacky^> yestarday was an interesting meeting here, a lot of peoples
[10:21:42] <Yuga> dam and i missed it
[10:21:48] <Yuga> i HATE my cap
[10:21:50] <Jacky^> :)
[10:22:02] <Jacky^> see the topic
[10:22:41] <Jacky^> are you working to build your machine ?
[10:22:56] <Yuga> in the planning phase
[10:23:03] <Jacky^> :)
[10:23:08] <Yuga> i think i know what i want... but i'm not sure :)
[10:23:15] <Jacky^> stepper or servo ?
[10:23:32] <Yuga> probibly stepper... cant afford servo's
[10:23:55] <Jacky^> hehe, i'm too..
[10:24:15] <Yuga> router?
[10:24:21] <Jacky^> yeah
[10:24:29] <Yuga> how big a cutting area?
[10:24:36] <Jacky^> small..
[10:24:44] <Jacky^> cm 20x20
[10:24:59] <Yuga> nice
[10:25:10] <Jacky^> just for testing
[10:25:18] <Yuga> * Yuga should also start with something small.. but!!!! i never do anything small
[10:25:21] <Jacky^> and learn
[10:25:32] <Yuga> i will learn as i break stuff :)
[10:26:08] <Jacky^> can you build the controllers from yourself ?
[10:26:47] <Yuga> nopes. buying those gecko ones
[10:27:09] <Jacky^> ah, nice, gecko are very good, they said
[10:27:23] <Yuga> yep... thats what they say :)
[10:27:32] <Jacky^> sure
[10:28:19] <Jacky^> so, youre waiting to get gecko controllers
[10:28:45] <Yuga> waiting till i have finalized my plan
[10:28:52] <Yuga> and need to work out a budget
[10:29:17] <Jacky^> you could try some experiment using a small IC uln2003 and some recycled stepper from an old printer..
[10:29:35] <Jacky^> to learn how emc work
[10:30:43] <Jacky^> the hard thing is to setup the ini file to work properly..
[10:30:59] <Yuga> yes... heard many ppl say that before
[10:31:05] <Yuga> u messed around with it yet?
[10:32:01] <Jacky^> yeah :)
[10:32:38] <Yuga> any luck?