#linuxcnc | Logs for 2012-02-06

[03:31:06] <Loetmichel> mornin'
[13:24:50] <Loetmichel> re @ home
[14:05:25] <Mjolinor> ok, need brains
[14:05:54] <Mjolinor> I have soem steppers here and I sort of assumed that if they were not notchy to turn when unpowered then they were knackered
[14:06:03] <Mjolinor> is that reasonable?
[14:07:06] <Mjolinor> thing is that these steppers are smooth to turn, they are 180 oz in steppers, 5.9 volt adn a resistance of 1.2 ohms (6 wire stepper,, resistance 1<>3, not end to centre
[14:07:44] <Mjolinor> so if I statically power one of the windings with 2 amps tehn I get a holding torque of about 125 oz in which seems ot me to say they are OK
[14:08:15] <Mjolinor> full current would be 3.1 but I dont have that on a constant current source, 2 is the most I can manage
[14:08:34] <Mjolinor> so, my assumption that steppers should be notchy if they are OK seems to be flawed
[14:08:42] <Mjolinor> comments please
[14:29:39] <archivist> would depend on the magnetics how notchy they feel unpowered
[14:31:43] <jdhNC> connect the coil wires and see if it feels notchier
[14:32:46] <archivist> as in short them together, it becomes a generator working into a short so you have to provide more effort
[14:39:35] <Connor> So, What would be a good sized fly cutter to get for my G0704?
[14:40:08] <Tom_itx> 3" ?
[14:40:38] <jdhNC> there are cheap 3 sets on ebay
[14:40:56] <Connor> Cheap on Shars.com too
[14:41:10] <Connor> http://www.shars.com/products/view/743/3_Piece_Fly_Cutter_Set
[14:41:12] <syyl> hmm
[14:41:17] <Mjolinor> good thinking
[14:41:27] <jdhNC> looks the same, other than price.
[14:41:28] <Mjolinor> they go extremely notchy when you short one winding
[14:41:30] <syyl> make it yourself :)
[14:41:43] <Connor> syyl: Was thinking of that too.
[14:42:17] <jdhNC> I ordered an R8 facemill for mine, but it hasn't gotten here yet.
[14:42:27] <syyl> in best case directly with an morsetaper/R8 shank fitting your mill
[14:43:02] <Connor> Why not 3/4" with Collet ?
[14:43:20] <syyl> personal preference ;)
[14:43:40] <Tom_itx> fewer things to get out of center
[14:43:43] <syyl> in my mind, direct chucking is better, more rigid..
[14:43:43] <Connor> Do plan to go TTS at some point.
[14:43:51] <syyl> tts?
[14:43:51] <Tom_itx> yup
[14:43:56] <Tom_itx> tape to shape?
[14:44:02] <jdhNC> tormach
[14:44:23] <Connor> Yea. Quick Change.. AKA Tormach.
[14:44:31] <syyl> then make one with an interchangeable shank ;)
[14:44:50] <jackc> Connor: how well did the cnc conversion go on your G0704?
[14:44:55] <jackc> was it a huge hassle or not bad?
[14:45:04] <Connor> jackc. Still in process. :)
[14:45:07] <archivist> I make my own flycutters
[14:45:17] <jackc> ah. are you replacing the screws with ballscrews?
[14:45:25] <Connor> I got side tracked. having to save up $$ for the motors and electronics.
[14:45:29] <Connor> not yet.
[14:45:48] <Connor> just doing the phase 1. I made all my motor mounts and stand off's though.
[14:45:54] <jackc> those cheap dovetails always scare me... how much does the table wobble when you ahve it tightened down properly?
[14:46:07] <jackc> (sorry to interrogate you, ive been trying to pick a mill for my house)
[14:46:21] <jdhNC> life is full of tradeoffs
[14:46:27] <jackc> quite
[14:46:28] <Connor> It doesn't. the 704 is very rigid.
[14:46:41] <Connor> more than the X3 by most peoples accounts.
[14:46:43] <jackc> wow
[14:47:14] <Connor> http://www.cnczone.com/forums/benchtop_machines/111863-hosss_g0704.html
[14:47:33] <Connor> go read that thread.. It'll take you a few days... or more. :)
[14:47:53] <jackc> will do- thanks for the info!
[14:48:16] <jdhNC> it (and the youtube videos) convinced me.
[14:48:22] <Connor> G0704/BF20/BF25 etc.. are easier to convert to CNC than the X3's too from what I can tell.
[14:48:25] <jackc> jdhNC: you ahve one as well?
[14:48:30] <jdhNC> yep
[14:48:39] <jackc> jdhNC: stock screws, or ball?
[14:48:52] <jdhNC> not sure yet.
[14:48:53] <Connor> he's waiting on me to get mine converted.. :)
[14:48:58] <jdhNC> heh, yep.
[14:48:59] <jackc> haha, ah :-p
[14:49:03] <Connor> ROFL
[14:49:19] <jdhNC> that and I picked up a brand new X2 for $200 that I'll probably do first.
[14:49:35] <jackc> cool
[14:49:44] <jackc> i gotta get back to work, catch you guys around
[14:49:52] <Connor> I got a little 7x10 lathe on long term loan.. that helped allot on making the stand off's
[14:53:00] <Gromits> Anyone know how to have a button be a specific size in Gladevcp? If I define a single button it is huge. I have tweaked most (or all) of the settings in glade to no avail...
[15:03:51] <Mjolinor> :eek:
[15:03:59] <Mjolinor> whopps, wroing window :)
[18:59:38] <JT-Shop> aww he left
[19:10:15] <skunkworks> no I didn't!
[19:12:05] <pfred1> Elvis has left the building
[19:12:14] <JT-Shop> LOL
[19:18:27] <elmo40> he left a LONG time ago...
[19:19:05] <skunkworks> wow - that seems like ages ago http://electronicsam.com/images/KandT/conversion/oh_its_a_start.JPG
[19:19:30] <pfred1> skunkworks at least 50 in Internet years
[19:20:15] <skunkworks> http://electronicsam.com/images/KandT/conversion/panel/electricalbox.jpg
[19:20:25] * skunkworks waits for Jymmm to yell at me
[19:20:41] <pfred1> about what?
[19:20:54] <cradek> haha pfred1 is new here
[19:20:58] <skunkworks> no panduit
[19:21:00] <skunkworks> heh
[19:21:10] <skunkworks> or whatever it is called
[19:21:17] <cradek> pfred1: Jymmm famously thinks nobody has neat enough wiring
[19:21:20] <pfred1> cable track?
[19:21:30] <skunkworks> yes
[19:21:55] <pfred1> if the cover goes on its all good
[19:23:00] <skunkworks> here here!
[19:23:05] <skunkworks> hear hear!?
[19:24:20] <Jymmm> skunkworks: spiral-wrap, I'm impressed.
[19:24:38] <skunkworks> that has always been in there...
[19:25:19] <Jymmm> cradek: Including my own =)
[19:34:56] <The_Ball> "if the cover goes on its all good", haha, true that
[19:36:07] <The_Ball> skunkworks, oh wow....
[19:36:29] <JT-Shop> unless it vibrates the good can be short lived
[19:36:50] <The_Ball> skunkworks, we use rapid prototyping development for software at work, looks about the same
[19:37:49] <The_Ball> skunkworks, I forget, you are using the mesa cards?
[19:39:28] <skunkworks> yes - 2 5i20's
[19:42:00] <skunkworks> The_Ball: how are things?
[19:42:44] <The_Ball> good, busy though, just got permanent power to my shed, so no more extension leads
[19:43:04] <The_Ball> 40 meters 16mm2 in conduit a bit of work
[19:43:26] <skunkworks> the mesa stuff is awesome
[19:43:47] <The_Ball> yeah, no argument there, my machine is a bit on the back burner
[19:44:38] <JT-Shop> I remember the day I rolled up the extension cord to the garage from the house... a wonderful day indeed
[19:45:32] <The_Ball> I doubt skunkworks had to do that in his "shed" but yes, a great day
[19:46:14] * JT-Shop puts the Gurley's down and goes back to making cheek pieces...
[19:46:23] <skunkworks> the shed was born with 3 phase...
[19:46:37] <skunkworks> boom?
[19:48:12] <The_Ball> boom?
[19:49:10] <skunkworks> JT-Shop: is working on a canon
[19:49:36] <The_Ball> oh cool, don't try that down here (.au) or they will come and pick you up
[19:52:11] <pfred1> I think a guy down the road from me has some sort of an artillary piece either that or a really big black powder gun
[19:52:38] <pfred1> something down that way goes boom every now and again and it is no shotgun
[19:58:18] <clytle374> one should note which terminal one is typing shutdown -h now ;)
[20:01:30] <The_Ball> pfred1, do you see a big smoke cloud?
[20:01:36] <JT-Shop> The_Ball: a 1/2 scale 6 pound civil war cannon... well two of them
[20:01:47] <pfred1> The_Ball it is pretty far away and the woods are pretty thick here
[20:01:49] <JT-Shop> 1 3/4" bore
[20:01:58] <Tom_itx> JT-Shop, so you can duel?
[20:02:18] <pfred1> The_Ball there could be a whole gun battery down the road and you wouldn't know it except for the sound
[20:02:28] <JT-Shop> well the children have 4 cannons and 2 mortars now to play with
[20:02:52] <Tom_itx> heck with paintball
[20:03:04] <pfred1> The_Ball actually until they moved it a few years ago 2 blocks from me they used to hold the world pumpkin chunkin championships
[20:03:06] <JT-Shop> getting close to having the wood parts done for the pair
[20:03:12] <The_Ball> JT-Shop, are you building it to some replica spec?
[20:03:37] <pfred1> The_Ball that would be this http://img59.imageshack.us/img59/1189/pict0594.jpg
[20:04:08] <JT-Shop> yea the carriage is 1/2 scale of the #1 carriage of the civil war ant the cannon is 1/2 scale except for the bore it is a tiny bit big so golf balls can be shot
[20:04:18] <The_Ball> pfred1, woha!
[20:04:31] <pfred1> The_Ball yeah not much to do around these parts
[20:04:45] <The_Ball> that would have been soo illegal in both norway and australia
[20:04:54] <pfred1> that used to be 2 country blocks south of me now it is across town
[20:05:08] <JT-Shop> the barrel http://www.dixiegunworks.com/product_info.php?cPath=22_106_665&products_id=15543
[20:05:21] <pfred1> The_Ball it is on TV these days
[20:05:55] <pfred1> I went last year skipped it this year
[20:22:38] <JT-Shop> other than watching the shots is it kinda boring
[20:22:58] <JT-Shop> looks like you can't get close to anything to see how it is built
[20:24:42] <clytle374> better on tv
[20:31:58] <pfred1> I could go over their houses in the off season the guy with the blue barrel lives around the corner from me most of the rest not too far away either
[20:32:46] <clytle374> unique design http://www.youtube.com/watch?v=WcNITnbkx_A&NR=1
[20:33:41] <pfred1> when I was there I saw the trebuchet world record shot by yankee siege
[20:33:55] <pfred1> that pumpkin was outta there!
[20:37:42] <clytle374> to a US person seems unreal that a government would outlaw machines that throw pumpkins. But NY outlawed sling shots, so why not
[20:48:52] <pfred1> clytle374 in my state if it shoots anyone can have it
[20:49:07] <pfred1> no license no registration no nothing
[20:49:30] <pfred1> well not anyone if you are certifibly insane or an ex con yo ucannot own
[20:49:35] <Tom_itx> deep south?
[20:49:42] <pfred1> not really delaware
[20:49:54] <pfred1> all we have here is concealed carry permit
[20:50:08] <pfred1> other than that you can open carry
[20:50:29] <pfred1> the NRA gives us a B+
[20:50:55] <pfred1> to get an A+ they pretty much have to hand out guns on the street corner to anyone who walks by
[20:51:25] <pfred1> we're not quite there yet
[20:51:52] <pfred1> but yo ucan walk into any walmart put your money down and pick up whatever
[20:52:07] <pfred1> hand guns rifles shotguns
[20:52:45] <pfred1> the general store by me has 50 cal ammunition right at the counter
[20:53:12] <Tom_itx> kinda hard to conceal one of those
[20:53:45] <pfred1> I submitted this picture http://www.city-data.com/picfilesv/picv9337.php
[20:53:57] <pfred1> Wilson's!
[20:54:23] <elmo40> no screening first?
[20:54:31] <pfred1> elmo40 no nothing
[20:54:32] <elmo40> no FBI check on your name and history?
[20:54:34] <elmo40> wow
[20:54:47] <pfred1> this is America
[20:55:06] <pfred1> we all shoot in our own backyards too
[20:55:50] <cstop> "I'll be need'in that gun, for squirrels and such"
[20:56:05] <clytle374> 50 cal black powered = no background check. If it takes a cartridge = background check
[20:56:49] <cstop> actually, I prefer the compressed air style.
[20:57:31] <pfred1> we're so isolated here better to have a few guns
[20:58:06] <clytle374> police are only 1/2 hour away here
[20:58:46] <pfred1> I saw a cop go down my street once I figure he was probably lost
[20:59:18] <jdhNC> no guns at walmarts here anymore
[20:59:36] <pfred1> they don't have much selection but they have them
[20:59:50] <pfred1> I think they only sell long guns
[21:00:09] <jdhNC> that's all they ever sold here, but they quit 4 or 5 years ago
[21:00:22] <pfred1> last i looked they still have htem here
[21:00:52] <pfred1> not that i shop for guns in walmart but I see them there
[21:01:13] <jdhNC> they have cheap ammo
[21:02:05] <Tom_itx> i drove by the remmington plant a while back but i forget what state it was in now
[21:02:12] <clytle374> Our walmart still carries semi-autos.
[21:03:20] <Tom_itx> i wonder what their handouts are if you take a tour
[21:04:18] <clytle374> I've got 3 ar forgings that I hope to machine someday
[21:05:42] <pfred1> there is some interesting info on the net about gun smithing
[21:08:34] <clytle374> I think it's going to be my first project when I get the mill running
[21:08:58] <clytle374> Might sell better if it's turnkey for ARs ;)
[21:09:17] <jdhNC> can you resell lowers you finish yourself?
[21:09:34] <clytle374> you can't make them with the 'intent' to sell
[21:09:45] <jdhNC> no, but after you get bored, can you resell one?
[21:10:06] <clytle374> I guess... but I don't want to deal with the ATF
[21:10:46] <clytle374> Been thinking of providing 1 on 1 cnc training.. The students project would be a lower
[21:11:35] <clytle374> So I got precise setup and built a 3.2 kernel that works.
[21:12:03] <clytle374> Now the 2.6.38 won't boot. Pukes about the filesystem being readonly
[21:12:28] <clytle374> I can log in, but I can't remount it RW since /dev/sda2 doesn't exist
[21:12:29] <FinboySlick> clytle374: You're missing an ext4 option is my bet.
[21:12:34] <clytle374> nope
[21:12:42] <FinboySlick> Large files.
[21:12:47] <clytle374> got it
[21:13:34] <clytle374> get lots of errors like " mknod blah blah failed file system read only"
[21:15:47] <clytle374> LBDAF [=y]
[21:17:06] <clytle374> I don't need JFS XFS do I?
[21:17:13] <The_Ball> yeah there was a one-way upgrade of one of the features in ext4
[21:17:47] <The_Ball> don't remember the exact version, but I was surprised
[21:19:50] <clytle374> I'll add both and see what happens
[21:20:13] <pfred1> ext4 runs so many processes
[21:20:30] <clytle374> Starting to think I NEED a new computer for this
[21:20:31] <pfred1> may not be the best filesystem for a CNC setup
[21:20:47] <clytle374> well, it's what comes with precise
[21:21:06] <pfred1> any Linux should be able to run ext2
[21:21:09] <clytle374> run ext4 on all my other gentoo boxes with no issues
[21:21:26] <pfred1> you doing cnc on your gentoo boxes?
[21:21:44] <pfred1> cnc isn't exactly a typical desktop applicaiton
[21:21:46] <clytle374> not yet, I doesn't work
[21:22:01] <The_Ball> clytle374, pfred1 is probably referring to realtime demands
[21:22:10] <clytle374> No I was talking about ext4 not needing anything weird on gentoo
[21:22:25] <clytle374> The_Ball, ah, makes sense
[21:22:32] <pfred1> ext4 works but I'm saying it might be better not to use it is all
[21:22:59] <pfred1> or an journaling filesystem
[21:23:11] <pfred1> any even
[21:23:20] <clytle374> Not sure if I missed that on the precise install or what..
[21:24:25] <clytle374> ah, just when you think you're about ready for bed... the cow goes into labor.
[21:24:26] <pfred1> ext2 is the most mature filesystem today it isn't changing so much
[21:24:39] <clytle374> great... all nighter.
[21:24:45] <pfred1> well have fun
[21:24:48] <clytle374> Can you install precise to ext2
[21:25:16] <pfred1> precisely what is precise?
[21:25:31] <clytle374> the latest youbloatedtoo
[21:25:45] <pfred1> it should work
[21:26:13] <pfred1> just hope you don't crash is all
[21:26:58] <pfred1> you may have to do an expert install to select it as an option
[21:27:08] <pfred1> it likely isn't the default
[21:27:08] <clytle374> this won't end up in the machine. it's just a testing box since it became personal
[21:27:27] <clytle374> it's definably not default
[21:28:19] <pfred1> rtai is definetly an added dimension to the puzzle
[21:28:40] <pfred1> best if it is treated as such too
[21:29:17] <clytle374> I'm not convinced it's rtai. I never found a rtai test that failed
[21:35:14] <clytle374> well, those options were not the problem.
[21:37:46] <clytle374> It seems to be booting fine. ie mounts root ro at first then about the time init should start I get all the mknod erros
[22:20:07] <cstop> Interesting, I was just reading literature on the Compumotor 2100 Indexers. Even back then, they had encoder "position verification" based on feedback from quadrature encoders. No velocity control, but position holding and motor stall compensation. Pretty neat.