#emc | Logs for 2004-12-13

[00:12:44] <a70camaro> anybody home?
[00:13:12] <robin_sz> sadly not
[00:13:19] <a70camaro> quiet today
[00:13:19] <robin_sz> the channel is deserted.
[00:14:04] <robin_sz> I need another project for christmas
[00:14:31] <a70camaro> ive been wiring my project today
[00:14:44] <robin_sz> with Big Volts?
[00:15:06] <a70camaro> yea , 180 vdc servo amps
[00:15:12] <robin_sz> kewl
[00:15:25] <robin_sz> how man amps are these beasts?
[00:15:50] <a70camaro> low amps , peak is 10 amp each motor
[00:16:00] <robin_sz> 1.8 kw
[00:16:14] <a70camaro> well the motor are only rated to 120v
[00:16:15] <robin_sz> so .. 2.2hp max
[00:16:26] <robin_sz> 1.8hp peak
[00:16:30] <robin_sz> then
[00:16:41] <robin_sz> big enough though
[00:16:45] <a70camaro> 1/3 hp each motor]
[00:17:02] <robin_sz> * robin_sz tries that again ...
[00:17:09] <robin_sz> 120V * 10A
[00:17:12] <robin_sz> 1200w ...
[00:17:19] <robin_sz> 1200/746 = ?
[00:17:40] <a70camaro> i have it running through a 1500 kva toroidal trnasformer to the servo power supply
[00:17:45] <robin_sz> 1.6hp
[00:18:00] <a70camaro> ive got more than enough power :-)
[00:18:14] <robin_sz> yeah :)
[00:18:38] <robin_sz> probably more than 1/3hp though ...
[00:18:50] <robin_sz> you can get more than that out of a nema 34 stepper
[00:19:59] <a70camaro> ive got it all going into a 30X36 enclosure ,if you have ever seen the inside of a Haas controller it is pretty much laid out the same way
[00:20:29] <robin_sz> the only Haas stuff ive seen is the PSU on my laser
[00:20:41] <robin_sz> and thats very neat
[00:20:49] <a70camaro> the computer , the amps , transformer ,I/O boards , vfd and the computer all fit insdide but it is tight
[00:21:17] <robin_sz> this is for your mill right?
[00:21:25] <robin_sz> * robin_sz forgets whose building what these days
[00:21:41] <a70camaro> i will be running a lathe and a mill from this controller (not at the same time) :-)
[00:21:48] <robin_sz> coo
[00:22:08] <robin_sz> running emc for the lathe?
[00:22:33] <a70camaro> the lathe is a grizzlt 12X36 and I replaced the single phase motor with a 3 phase so i can have constant feed rates
[00:22:51] <robin_sz> vfds are handy
[00:23:02] <a70camaro> no i am not runing EMC at the moment , I am using a Galil motion card and Camsoft CNC
[00:23:09] <robin_sz> right
[00:23:20] <robin_sz> mach2 has some good stuff for lathe work
[00:23:43] <robin_sz> the threading stuff is quite qorkable now from what I understand
[00:23:48] <robin_sz> workable
[00:24:21] <a70camaro> I would have liked to use MAch2 but I cant get over the fact that it still isnt a truley closed loop system
[00:24:34] <robin_sz> shrug
[00:24:40] <a70camaro> yea I know
[00:24:47] <robin_sz> 90% of emc installs arent either
[00:25:40] <robin_sz> I'd say most people end up using stppers, only about 10% use servos, from my random guess anyway
[00:25:44] <a70camaro> I worked with a open loop stepepr mill at work , a old Bridgeport Series 2 , and we lost a bunch of parts
[00:25:54] <robin_sz> it happens
[00:25:56] <a70camaro> over the year due to loosing steps
[00:26:17] <robin_sz> mainly in the Z axis, right?
[00:26:29] <a70camaro> nah this machine has problems its all over
[00:27:03] <robin_sz> the old bridgeports had a weakness in Z ... if the lube ran a bit low, it just stuck
[00:27:35] <a70camaro> probably wouldnt have been a big deal with part loss but we are machining castings
[00:27:46] <robin_sz> right
[00:28:05] <a70camaro> bar stock no big deal just cut another
[00:28:07] <robin_sz> servos are much better in almost all respects
[00:28:22] <robin_sz> but, homebuilders usually do them stepper thing.
[00:28:29] <robin_sz> back in 10, teatime
[00:28:48] <a70camaro> well I got great deals on everything I have ,mainly all Ebay , probalby saved 50%
[00:28:57] <a70camaro> cya
[00:51:23] <robin_sz> damn ... I think I have the urge to buy a CNC lathe ...
[00:51:34] <robin_sz> dont you just hate it when that happens?
[00:56:43] <cradek> if you did, maybe you would put threading in emc
[01:14:47] <robin_sz> nah
[01:15:10] <robin_sz> I;d buy a working cnc lathe with a controller
[01:15:32] <robin_sz> * robin_sz looks at a nice tasty Mazak ...
[16:21:37] <paul_c> * paul_c is away: making chips
[19:53:59] <paul_c> * paul_c is back
[20:20:43] <tbl> hey paul
[20:24:30] <paul_c> Yo Mike
[20:45:29] <paul_c> Yo Ray.
[20:45:54] <rayh> Hi Paul
[20:47:18] <paul_c> got the mount points in BDI-4 fixed...
[20:49:58] <rayh> Good. Matt said that he had a problem installing on his older computers.
[20:50:50] <paul_c> How old ?
[20:51:01] <rayh> What directory structure are you using for supermount?
[20:51:27] <rayh> These were the boxes that they are shipping now.
[20:52:03] <paul_c> Not enabled supermount just yet...
[20:52:19] <paul_c> and what problems is Matt having ?
[20:54:53] <rayh> Remember that box with the lcd on the side. That's the one.
[20:55:41] <paul_c> ye gads... Vintage hardware !
[20:56:57] <rayh> Thought you like that.
[21:01:31] <paul_c> * paul_c runs through an install with BDI-4.03 (on a 433MHz board)
[21:02:55] <tbl> heys guys
[21:03:31] <paul_c> you're back...
[21:03:42] <tbl> busy coding
[21:03:46] <tbl> been neglecting irc
[21:03:49] <tbl> which is nothing new =)
[21:04:25] <tbl> asked a few non biased linux dev's about 2.6
[21:04:33] <tbl> got some interesting feedback
[21:05:33] <tbl> <spam>
[21:05:39] <tbl> There's a large amount of discussion on this right now.
[21:05:39] <tbl> It's my take currently that the 2.4 kernel series is antiquated and a
[21:05:39] <tbl> patch disaster. In order to get normal features that you would expect in a
[21:05:39] <tbl> 2004 OS, and an advanced compile system, you must either patch the shit
[21:05:39] <tbl> out of 2.4 (and probably make it unstable) or you can go with 2.6.
[21:05:40] <tbl> Right now, no kernel devs want to maintain a stable kernel because "it's
[21:05:43] <tbl> boring." So they are saying that the distributions should be responsible
[21:05:44] <tbl> for a stable kernel. I think this is the worst idea ever. I believe that
[21:05:46] <tbl> they will realize this in another month and force a kernel dev to maintain
[21:05:48] <tbl> the stable branch.
[21:05:50] <tbl> What's happening right now is that 2.6 is being maintained more like an
[21:05:52] <tbl> unstable kernel branch, but that doesn't mean that it's not stable. Since
[21:05:54] <tbl> 2.6.7, the VM has been worked on extensibly. I personally, have had a
[21:05:56] <tbl> couple stability issues with 2.6.7. They are extremely rare: I'm running
[21:05:59] <tbl> it on 12 machines, 2 crash once a month, the rest run perfectly.
[21:06:02] <tbl> I believe the 2.6.10 kernel to be in excellent condition. The only reason
[21:06:04] <tbl> I'm not using it is because the grsecurity patch is not available for that
[21:06:06] <tbl> version. But you don't need that, right?
[21:06:08] <tbl> Basically, I highly recommend the 2.6 kernel, and encourage you to use it.
[21:06:10] <tbl> Are the realtime patches available for it?
[21:06:12] <tbl> im going to get booted for that haha
[21:07:59] <tbl> http://obstinate.org/t/linux.txt for those who don't like the sizing
[21:08:11] <tbl> also the 2.6 FS is really really cool
[21:08:26] <tbl> its about time that a x86 mainstream unix has REAL journaling
[21:13:09] <rayh> Hi Mike.
[21:13:20] <rayh> Thanks for that update on kernels.
[21:13:38] <rayh> I ran SuSE a bit here with 2.6.7 and it crashed twice.
[21:15:35] <sxpert> my fedora core 2 server only crashed because the breakers went live
[21:16:22] <tbl> bleh @ those bloated OS's though
[21:16:34] <tbl> the only linux's that i would run "off the iso" would be like debian or slackware
[21:16:41] <tbl> i would just assume do a linux from scratch
[21:18:34] <sxpert> gentoo is pretty cool too
[21:18:48] <sxpert> (basilcly an automated LFS)
[21:18:50] <tbl> what boggles my mind
[21:18:56] <tbl> is gentoo has no automated installer
[21:19:02] <tbl> to keep the "un-skilled" people out
[21:19:19] <sxpert> tbl: you have to admit that it works ;D
[21:19:28] <tbl> now, i am not exactly unskilled when it comes to linux / unix os's but i don't think i should have to read 50 pages of docs to get an os installed
[21:19:36] <tbl> i will never install gentoo
[21:19:43] <tbl> i have shells on boxes with it, and it seems neat
[21:25:31] <cradek> I installed it once and it was tedious. I think it's for linux wankers with neon computers. I don't see any problem with binary packages and they are faster when I have to get on to doing actual work.