#linuxcnc-devel | Logs for 2014-12-04

[01:04:14] <Connor> zeeshan: It's most likely is
[08:35:13] <Sansi> hi @ll
[08:45:01] <jepler_> anyone skilled at identify surface mount components? I'd love to know for sure what the three-terminal device in the lower left is, "BfG3D", in this photo. http://s637.photobucket.com/user/_enlighten_/media/Radio%20Control/FnmQX/nQX_Top_zps8462a40d.jpg.html I suspect it's a linear voltage regulator, but nothing at http://www.s-manuals.com/smd/bf seems to match it.
[09:06:54] <archivist> fotofukket gives me a white screen
[09:08:11] <archivist> http://www.collection.archivist.info/archive/grabs/Screenshot-10.png
[09:27:36] <cradek> it wfm
[09:28:00] <jepler_> archivist: yuck sorry. I assume you have aggressive blocking of sh--y websites. It's not my photo, but I put a copy here: http://emergent.unpythonic.net/files/sandbox/nQX_Top_zps8462a40d.jpg
[09:29:07] <archivist> fotofukket has been failing for a long time, even before I turned up the wick crap rejection
[09:29:24] <jepler_> the soic's pin 47 is a ground, and it looks like terminal 3 is connected in the bottom layer to pin 49, a supply pin
[09:30:46] <jepler_> er maybe I'm confused on my sot23 pin numbering
[09:31:10] <jepler_> the other terminal on the two-terminal side
[09:31:13] <jepler_> and of course pin 48, not 49
[09:31:58] <archivist> a regulator seems a good assumption
[09:32:25] <archivist> unless it was a (fet) switch
[09:32:28] <pcw_home> look at the pins it connects to sure seems like a LDO
[09:32:43] <pcw_home> 3.3v for CPU?
[09:32:49] <cradek> with the big and small caps across the input
[09:32:54] <archivist> I vote for regulator anyway
[09:33:09] <jepler_> ---o must be a company logo, I just don't know who
[09:33:46] <pcw_home> figure out the inputs and outputs and CPU spec and you can replace with a generic LDO
[09:34:29] <jepler_> actually i'm trying to figure out if I can power the whole thing from USB +5V. Normally it's run of a 1S LiPo .. nominal voltage 3.7v
[09:34:43] <jepler_> the MCU is 2.0-3.6V operation
[09:35:21] <pcw_home> so does the MCU VDD come from the LDO or power-in
[09:35:27] <pcw_home> ?
[09:37:10] <jepler_> I assume from the LDO's output. Open-circuit, a charged LiPo measures over 4V, so I don't think you'd want to run the mcu off it unregulated
[09:37:23] <pcw_home> or run it off USB with 2 1N4001 diodes in series
[09:37:45] <jepler_> yeah if it would ease my mind
[10:20:24] <archivist> I wonder what the MTBF of an MTBF thread is
[10:24:31] <seb_kuzminsky> heh
[11:00:38] <skunkworks> or.. A 7i52 + 7i49..
[11:01:38] <skunkworks> I assume the 7i52 would allow me to connect the 7i73 and 7i69
[11:03:17] <skunkworks> that would give me resolvers, encoders and serial while still giving me 3 24 relay opto22 boards
[11:58:33] <seb_kuzminsky> cradek: great(?) minds think alike
[11:58:59] <cradek> in general, mediocre or poor minds think more alike than great minds do
[11:59:49] <cradek> oops I see what you did there
[12:00:06] <cradek> that minute or two delay causes this sometimes, unfortunately
[12:00:19] <cradek> I was just happy to see that I had updated the docs
[12:00:43] <seb_kuzminsky> yeah :-)
[12:39:29] <skunkworks> pcw_home, ^
[12:42:15] <pcw_home> Yes a 7I52 will work encoder in/sserial out
[12:42:16] <pcw_home> Still not sure whether those resolvers will work,
[12:42:18] <pcw_home> the 12V in vs 0.3V out sounds like an inductosyn so maybe 100s of poles?
[12:43:45] <skunkworks> ah
[12:43:50] <pcw_home> (inductosyn = PCB air core resolver)
[12:44:10] <pcw_home> very high loss
[12:58:16] <skunkworks> I don;t have the part number here.
[13:04:08] <skunkworks> it is made by Tamagawa
[13:16:17] <seb_kuzminsky> the "embedded java irc client" at http://www.linuxcnc.org/index.php/english/community doesn't start any more
[13:16:29] <seb_kuzminsky> when i click the link it says "Direct Access to this location is not allowed."
[13:31:34] <pcw_home> I wonder if yours is even the same as Leonardo's
[13:32:24] <skunkworks> his is one generation older..
[13:32:43] <skunkworks> control wise - the layout looks exactly the same
[14:07:14] <seb_kuzminsky> also the link to the irc client on our wiki is 404
[14:09:17] <cradek> https://webchat.freenode.net/
[14:10:22] <coffee_monster> cool, cradek
[14:11:04] <coffee_monster> how long has freenode been offering this service? any idea if it's going to be around? maybe we should point our links here instead
[14:12:36] <cradek> fixed our page to point to that
[14:12:45] <coffee_monster> thx
[14:14:05] <coffee_monster> will you update the wiki too or should i?
[14:14:25] <cradek> link to our archive is 404 too
[14:14:29] <cradek> jeez
[14:15:13] <cradek> removed those
[14:15:42] <coffee_monster> we were all here, the day something was removed form our wiki
[14:15:48] <coffee_monster> we'll tell our grandchildren about this
[14:15:55] <cradek> I haven't done the wiki
[14:16:00] <cradek> don't get all that way
[14:17:40] <skunkworks> freenode has had that for atleast a few years.. I used to only use the linuxcnc or freenode web clients.
[14:18:18] <coffee_monster> cool
[14:26:57] <skunkworks> pcw_home, http://www.electronicsam.com/images/Mazak/Resolver.jpg
[14:27:03] <skunkworks> not finding much info yet
[14:27:39] <cradek> resolver from 2001 is surprising
[14:28:11] <skunkworks> yes - I think they could not figure out the x axis issue they where having.. It looks like it has a new balscrew also..
[14:29:05] <cradek> yay extra new parts
[14:29:09] <cradek> too bad you didn't get the old ones too
[14:29:16] <skunkworks> heh - right
[14:36:17] <Tom_itx> http://www.cnc-shopping.co.uk/mitsubishi-rt-3xc-11-bko-6062a-ts2014n43e3-1-pickup-unit-p-3240.html?osCsid=2aecd5f5417c68dd0f2293e1651e5ae5
[14:38:40] <skunkworks> Tom_itx, we are wondering what it actually is. resolver, inductosyn...
[14:38:57] <Tom_itx> RT-3XC-11 may be similar acording to that
[15:08:01] <PCW> I like the generic techincal info on the last link
[18:38:57] <KGB-linuxcnc> 03Sebastian Kuzminsky 052.6 0af483a 06linuxcnc 10docs/src/Submakefile docs: simplify the docs build a tiny bit * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=0af483a
[18:44:25] <PCW> 3 mb/s Ethernet maybe only at Xerox in 1978
[18:48:35] <PCW> oops
[20:22:32] <KGB-linuxcnc> 03Dewey Garrett 05dgarr/moveoff 9a5f782 06linuxcnc 10(10 files in 2 dirs) hookup_moveoff.tcl: new [HAL]HALFILE * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=9a5f782
[20:54:59] <skunkworks> https://www.youtube.com/watch?v=Pe2RACwiEbg&feature=youtu.be
[21:32:27] <tinkerer> wow!
[21:34:21] <Tom_itx> good stuff skunkworks
[21:34:26] <PetefromTn_> skunkworks jeez man you never cease to amaze me
[21:34:34] <PetefromTn_> where did this come from?
[21:41:12] <skunkworks> A bit of a hack... but seems to work ok.. I still think the circle recognition function in opencv should work better.
[21:41:39] <PetefromTn_> I was not even aware there was such a thing
[21:44:54] <seb_kuzminsky> cool skunkworks
[21:46:32] <Tom_itx> does it matter if the circle in the crosshairs match the target?
[21:52:39] <skunkworks> I give it a min and max size to look for.
[21:52:50] <skunkworks> (which is the center circles)
[21:53:29] <skunkworks> white on black isn't as big a deal - but if you give it too large a tolerance - it finds circles everywhere
[22:01:07] <skunkworks> think we figured out the x axis problem on the lathe.. There is either a busted up bearing in the servo - or something has come apart in it. it feels to me like a bearing.. turns for a bit and locks up - giggle it and it will turn a bit more then lock up..
[22:01:35] <Tom_itx> sounds like a bearing
[22:02:32] <skunkworks> so I think they replaced the resover, leadscrew and a few other things and never notice the servo had issues..
[22:02:50] <PetefromTn_> what model mazak is that?
[22:04:29] <Tom_L> https://www.youtube.com/watch?v=ZwkoGtsaG9c
[22:04:31] <Tom_L> cnc pron
[22:07:36] <skunkworks> it is a quick turn 20 universal from 85
[22:08:44] <PetefromTn_> wow that is some heavy milling with that insert cutter
[22:10:36] <skunkworks> honestly took 15 minutes to trouble shoot it to that point. Powered up the x axis brake and tried to turn the servo/leadscrew. Actually thought the brake wasn't disengaging. removed brake - still felt the sticking. removed the belt. axis/leadscrew moved normally (other than the pully mounted on the end of the ballscrew is loose... Servo didn't rotate smoothly
[22:11:11] <skunkworks> I think troubleshooting is a dead art..
[22:11:55] <Tom_L> naw
[22:12:12] <PetefromTn_> That is a relatively simple thing to troubleshoot tho sounds like..
[22:12:19] <Tom_L> Seco sure likes to show off their cutters...
[22:12:26] <Tom_L> https://www.youtube.com/watch?v=vyT8UTkCc4k
[22:12:52] <PetefromTn_> I used to enjoy using the seco octomill facemill in the shop I worked in. Would like to get one for the VMC
[22:13:22] <Tom_L> we has some but mostly sandvik and valenite
[22:13:43] <PetefromTn_> looks like those inserts were taking a beating on that vid
[22:16:35] <PetefromTn_> https://www.youtube.com/watch?v=IUBQN1JfY80
[22:22:08] <Tom_L> what was the chipload on that?
[22:22:12] <Tom_L> you can see it..
[22:22:49] <PetefromTn_> no idea
[22:23:24] <Tom_L> looks like around .006-008 at least
[22:26:56] <PetefromTn_> all I know is that they really made a nice surface finish as long as the inserts were not damaged and you could remove quite a bit of material rather quickly with them. They are kinda pricey tho as are the inserts but you get eight sides on each side so they last quite awhile.
[22:30:10] <Tom_L> JT-Shop, here's your ball you needed :D https://www.youtube.com/watch?v=EjkvPLNgj0o
[22:37:06] <PetefromTn_> that is pretty awesome machine and programming there I think hehe