#emc | Logs for 2005-08-19

[01:16:06] <Jacky^> [nolog] ZZZzzzZZZzzzzz
[01:40:30] <Jacky^> Gnight
[02:17:16] <steves_logging> steves_logging is now known as steve_stallings
[02:17:47] <paul_c> Morning Steve..
[02:18:11] <steve_stallings> hi Paul, is it morning there already? 8-)
[02:18:29] <paul_c> Has been for over two hours
[02:18:54] <Jymmm> yeah... 2am in the morning
[02:19:04] <steve_stallings> seems my days and nights have been inverted lately, been too busy
[02:19:26] <Jymmm> steve_stallings : Just be lucky you don't live in Alaska
[02:19:46] <steve_stallings> I would be fine for half the year...
[02:20:19] <Jymmm> 24 hours of darkness, followed by 24 hours of sunlight
[02:21:10] <Jymmm> Actually, I think it's 3 months of each iirc.
[02:33:55] <paul_c> Time for bed...
[04:08:39] <Jymmm> Does anyone care that I found bugs in BDI in respect to disk partitioning during install?
[16:03:58] <paul_c> \o/ BDI-4.23 installing to SCSI....
[16:27:29] <Jymmm> ewwww
[16:29:02] <paul_c> Jymmm: You have something to say ??
[16:29:44] <Jymmm> Yeah, SCSI sucks.... too expensive in comparision. (less a stroage array where the performance is needed)
[16:30:59] <paul_c> * paul_c has four 9.1Gig SCSI drives plus controllers kicking around. Total investment....
[16:31:04] <paul_c> $0
[16:31:50] <anonimasu> my scsi drives lasted like 7 years before dying, where teh ATA133 drives lasted about � a year..
[16:31:53] <anonimasu> :)
[16:32:03] <anonimasu> the..
[16:32:24] <Jymmm> anonimasu dont buy WD/Maxtor drives then
[16:32:58] <paul_c> and SATA drives are mapped like SCSI drives in a Linux system...
[16:33:25] <paul_c> so hopefully, they should work too.
[16:33:29] <Jymmm> everything is mapped like scsi drives in linux
[16:35:26] <paul_c> well... The kit was free.... So I may as well use it - Even if it is only for testing purposes.
[16:35:37] <Jymmm> free is good
[16:36:21] <paul_c> The current test system: http://www.kontron-emea.com/downloads/datasheet/VIPer830.pdf
[16:36:58] <Jymmm> paul_c: Is there a way to net install BDI? Like boot from a lfoppy to another machine?
[16:38:24] <paul_c> The BDI-2 and BDI-4 both use anaconda.... So a net install is possible (in theory).
[16:38:59] <Jymmm> paul_c: you have any idea on what I need to create a boot floppy for the install?
[16:39:39] <paul_c> um.. A boot floppy is the one thing missing from BDI-4
[16:40:33] <paul_c> If you feel masochist, you could use a Debian boot floppy.
[16:41:15] <Jymmm> I only know debian install, not remote install like from another local machien.
[16:44:12] <paul_c> http://www.debian.org/releases/stable/i386/index.html.en has some info on floppy/net installs
[16:46:51] <Jymmm> Thanks, but way too time consuming for just a "maybe".
[16:48:04] <paul_c> damit... dhcp3 is causing "problems"...
[16:56:20] <paul_c> Jymmm: Did you have a partitioning "bug" to report ?
[16:57:16] <Jymmm> paul_c: When I tried installing in the Laptop bug of box popped up saying 'bug' in blah.c: 5xx
[16:58:02] <paul_c> BDI-4 ?
[16:58:08] <Jymmm> I didn't get a succesful install (I think due to the cdrom)
[16:58:15] <Jymmm> yeah 4.21
[16:58:36] <Jymmm> but I just think it didn't like the hdd for some reason.
[16:58:40] <paul_c> 4.21 never made out in to the world...
[16:58:50] <Jymmm> 4.22 then
[16:59:07] <paul_c> nope.
[16:59:22] <paul_c> The last public release was 4.20
[17:00:01] <paul_c> Can you remeber at what point the error popped up ?
[17:00:41] <Jymmm> before and about the auto partion point.
[17:00:45] <Jymmm> after
[17:02:20] <paul_c> sounds like a libparted bug - Unfortunately, beyond my control.
[17:02:31] <Jymmm> okey dokey
[17:04:02] <paul_c> If you come across it again, note the message in full and there might be a chance of a workround in anaconda.
[17:04:12] <Jymmm> will do.
[17:09:34] <paul_c> ahpoo... Sherline's configs use the wrong GUI
[17:16:50] <paul_c> bloody hell.... SCSI does impact on performance !!!!
[17:18:38] <anonimasu> paul_c: heh
[17:18:41] <anonimasu> not surprisingly
[17:19:22] <paul_c> first install on a SCSI box... Runs the Sherline GUI fine... But...
[17:20:09] <paul_c> Switch between views on backplot, and the whole thing stops while the screen gets redrawn.
[17:23:37] <paul_c> Now.... That was... um interesting - Axis bombed out & killed KDE
[17:23:47] <Jymmm> * Jymmm would like to note.... Don't buy a machine from K2CNC
[17:28:28] <Jymmm> Does anyone know a good way to measure backlash?
[17:30:24] <paul_c> How close do you want to get ?
[17:30:58] <Jymmm> I'd like to see how much (in any) backlash there is.
[17:31:03] <Jymmm> s/in/if/
[17:31:38] <paul_c> to the nearest 0.000001" ?
[17:31:55] <Jymmm> Can I do that?
[17:32:22] <Jymmm> 4 digits would be nice
[17:32:25] <paul_c> with an inferometer & temperature controlled lab, maybe.
[17:34:22] <Jymmm> 0.0001"
[17:37:56] <paul_c> You need one of these > http://catalog.starrett.com/catalog/catalog/groupm.asp?GrpTab=More&GroupID=462
[17:38:33] <paul_c> preferably a "tenths" gauge
[17:38:42] <Jymmm> I have a (cheap) dial gauge, but I'm not sure how you actually TEST for backlash.
[17:39:33] <paul_c> OK... Mount the dial gauge in the spindle...
[17:40:15] <paul_c> move the table in the + direction (say 1")
[17:41:12] <paul_c> Place a solid block on the table and carefully slide it up behind the dial gauge lever until you get a reading
[17:41:26] <paul_c> Note the reading....
[17:41:49] <paul_c> Move the table another 1" in the + direction
[17:42:42] <paul_c> Now move the table back in the - direction exactly 1"
[17:43:25] <paul_c> the dial gauge should now be touching the block again - Note the reading for the second time.
[17:43:52] <paul_c> The difference between the readings is your backlash
[17:44:19] <Jymmm> difference direct or by half?
[17:44:52] <paul_c> Total backlash at the point it was measured.
[17:45:11] <paul_c> Backlash can vary along the length of travel.
[17:45:17] <Jymmm> 1.00 - 0.90 = .10 <--- .10 or half that value?
[17:48:48] <Jymmm> Kinda nice, but not available in the US --> http://www.jlindustrial.com/catalog/product.jsp?origin=SEARCH%3AKEYWORD&id=AFE-10020L
[17:49:00] <Jymmm> info here --> http://www.welsoft.co.uk/machmill/hs290.htm
[17:50:24] <paul_c> Normally, one enters the full backlash reading and let the software decide when & where it needs half.
[17:50:44] <Jymmm> Ok, that's what I was wondering. =) thanks
[17:51:03] <paul_c> http://www.welsoft.co.uk/machmill/hs90.htm
[17:52:43] <Jymmm> Bastard keeps talking about the 'optio-set', but can't get the damn ting here! LOL
[17:52:49] <Jymmm> thing
[17:53:13] <paul_c> Renishaw do something similar
[17:55:38] <Jymmm> I wish I could figure out a way to 'optically' measure distance then be able to feed it back into the controller.
[17:55:59] <Jymmm> like during manual tool changes, etc.
[17:56:07] <paul_c> linear encoders...
[17:56:34] <Jymmm> but that would require physical contact, wouldn't it?
[17:57:48] <paul_c> yup - Or are you thinking of something to measure tool diameter & length ?
[17:59:08] <Jymmm> Just length
[17:59:29] <Jymmm> to (re)zero out Z axis
[18:00:18] <paul_c> http://www.renishaw.com/UserFiles/acrobat/UKEnglish/MTP-NEW-001.pdf
[18:00:43] <paul_c> http://www.renishaw.com/client/product/UKEnglish/PRD-6106.shtml
[18:02:38] <Jymmm> should we contact them for samples to intergrate into EMC?
[18:02:51] <Jymmm> =)
[18:02:53] <anonimasu> hm
[18:03:03] <anonimasu> I dont think they care :D
[18:03:33] <Jymmm> if it means selling more product, they do.
[18:04:10] <anonimasu> Jymmm: They can afford to skip emc.
[18:05:12] <anonimasu> that stuff if way out of the range anyone that has to use emc can pay for..
[18:05:19] <anonimasu> has/uses
[18:06:20] <anonimasu> atleast the laser toolsetter ;)
[18:07:06] <paul_c> The principle is pretty simple - It could be used with emc
[18:09:49] <Jymmm> If one used a $0.99 laser pointer, what could be used to read it with?
[18:10:37] <paul_c> Any photodiode would detect the beam
[18:11:47] <paul_c> Get one designed for 660nm(is)
[18:12:01] <Jymmm> why that wavelength?
[18:12:21] <Jymmm> Near IR iirc
[18:14:24] <paul_c> red goes from 630 to 700nm
[18:14:43] <paul_c> depending on the doping materials
[18:15:09] <paul_c> http://www.marktechopto.com/engineering/history.cfm
[18:15:13] <Jymmm> gallium arsen something or another =)
[18:15:45] <paul_c> 635nm if I remeber correct
[18:15:57] <paul_c> * paul_c -> dinner.
[18:19:39] <Jymmm> anonimasu hows your USC coming along?
[18:20:47] <anonimasu> Jymmm: oh, not much at all..
[18:20:49] <anonimasu> work and more work..
[18:21:39] <Jymmm> ah, ok
[18:22:14] <anonimasu> going to work all day tomorrow + sunday
[18:22:20] <anonimasu> so I doubt I'll get time over for the USC
[18:27:12] <Jacky^> hello
[18:30:12] <Jacky^> i'm going to add optocouplers to parallel port, using an IC7805 for 5V ps
[18:30:54] <Jacky^> should i add some resistor between optocouples an parallel port pin ? anyone know ?
[18:31:32] <Jacky^> i'm also using pin 12-13-15 for limit switches
[19:27:16] <paul_c> Jacky^: Resistors, Yes - Unless you use TTL level input optoisolators
[19:37:13] <Jacky^> paul_c: i've 2 types here
[19:37:47] <Jacky^> one is 4n33, but i will use it for limit switch only..
[19:38:25] <Jacky^> beacuse it have a slow raise time.. 100 us
[19:39:11] <Jacky^> the other is pc817 toshiba, should have 3 us
[19:39:34] <paul_c> 6N137 is rated at 10MBits/Sec
[19:39:43] <paul_c> http://www.fairchildsemi.com/ds/6N/6N137.pdf
[19:40:02] <Jacky^> I know.. i've some other link
[19:40:32] <Jacky^> the problem is to request an order just for 1 ic :\
[19:41:03] <Jacky^> when i've here a lot.. but 4n32-4n33 :(
[19:41:32] <Jacky^> the only i found to be fast should be the toshiba
[19:41:50] <Jacky^> i could use it for pin 2-7
[19:42:08] <Jacky^> and 4n33 for pin 12-13-15
[19:42:52] <Jacky^> aniway i will try ..
[19:43:10] <Jacky^> i'll also add the resistor then
[19:44:43] <Jacky^> otherwise, i could wait when i'm ready for a consistent order..
[19:45:26] <Jacky^> maybe the best way
[19:45:37] <Jacky^> ok, tnx, later..
[19:45:54] <Jacky^> Jacky^ is now known as Jacky^afk
[19:49:01] <paul_c> You want HCPL-2730 or HPCL-2731
[19:50:06] <paul_c> Not quite as fast as 6N139
[19:59:59] <Jacky^afk> Jacky^afk is now known as Jacky^
[21:19:44] <Jacky^> channel
[21:19:50] <Jacky^> ops
[22:47:39] <PhydBleep_> PhydBleep_ is now known as Phydbleep
[22:48:39] <Jymmm> Phydbleep Hey you old dawg!
[22:52:41] <Jacky^> uhm..
[22:53:02] <Jacky^> is Phydbleep or is a bot ? O-o