#linuxcnc | Logs for 2012-08-14

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[01:24:48] <r00t4rd3d> http://i.imgur.com/MWEZ4.jpg
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[01:27:09] <jdh> is that from the 16 yr old girl you were chatting with?
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[01:35:34] <r00t4rd3d> yeah
[01:35:50] <r00t4rd3d> she is hot and dirty
[01:37:08] <r00t4rd3d> www.reddit.com/r/battlestations
[01:46:52] <jdh> battlestation?
[01:52:11] <r00t4rd3d> gamers
[01:59:49] <ReadError> that picture = diabetus
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[02:35:23] <jp_> how do you get a following error on a stepper system?
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[02:38:49] <jdh> config problem. Stepping too fast
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[02:41:53] <r00t4rd3d> wow i just got a weird request. A lady wants a sign for a flower girl to hold instead of flowers
[02:42:00] <jp_> but how does the controller know?
[02:42:11] <r00t4rd3d> "Last Chance To Run Cal!"
[02:42:32] <jdh> it uses the stepgen output
[02:42:46] <r00t4rd3d> parallel settings
[02:43:55] <jp_> i still fail to see why the controller would see a following error
[02:44:13] <jdh> the requested step rate can not be generated
[02:44:32] <jp_> ah ok that makes sense
[02:44:52] <jdh> I've seen it when the base period was too high for the requested speed
[02:44:52] <jp_> hardware limitation
[02:45:08] <jdh> if the values are accurate, it is a HW limit.
[02:45:39] <jp_> i get it. sorry it's my first time playing with steppers
[02:46:01] <jdh> I only know because I had the same thing happen.
[02:46:38] <jp_> so if i lower my microstep rate per rev i can go a bit faster
[02:46:45] <jdh> yep.
[02:47:08] <jdh> or decrease screw pitch, or get a box with lower latency, or get a cheap mesa card
[02:47:17] <jp_> or accelerate faster
[02:47:26] <jp_> im using mesa
[02:47:35] <jp_> 5i25 and 7i76
[02:47:37] <jdh> then it is a config issue
[02:48:18] <jp_> ill drop the drive down to 1000ppr
[02:48:47] <jdh> I doubt you are hitting a mesa HW limit.
[02:48:54] <jdh> more likely just a config prolem.
[02:49:21] <jp_> just running pncconf for right now
[02:50:03] <jdh> my pncconf config did the same
[02:51:12] <jdh> stepgen.00.maxaccel and .maxvel perhaps.
[02:51:39] <jdh> for all axes
[02:51:50] <jp_> yeah when i increased those thats when i got the error
[02:52:07] <jp_> sorry in the ini
[02:53:54] <jdh> I think even my pport driven 7i43 can do mhz stepping. the pci one should be as good or better.
[02:54:45] <Tom_itx> jt's config is likely on his site
[02:54:58] <Tom_itx> he's using a 5i25 on his plasma
[02:55:24] <Tom_itx> i'm using the 7i43 as well with good results
[02:56:16] <jp_> i use the 7i43 on my mill
[02:56:25] <jp_> no complaints
[02:58:42] <pcw_home> If you have a following error with the hardware stepgen it usually means you have fairly high jitter in the servo thread
[02:58:44] <pcw_home> the workaround is to set the stepgen maxaccel about 20% higher than the machine maxaccel
[02:59:08] <Tom_itx> http://gnipsel.com/linuxcnc/configs/index.html
[02:59:21] <jp_> jitter numbers look good on the latency test
[02:59:35] <Tom_itx> that might give you a starting point
[02:59:41] <pcw_home> the 5I25 will do up to 8.33 MHz step rates, the 7I43 12.5 MHz
[03:00:13] <pcw_home> As I pointed out lately in the emc developers list the servo thread latency test lies
[03:01:03] <pcw_home> (measured >100 usec jitter via scope latency test shows 6 usec)
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[03:01:38] <jp_> default step timing doesnt help either
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[03:02:35] <jp_> PCW_home:good to know thanks!
[03:02:39] <r00t4rd3d> stupid peer
[03:03:12] <pcw_home> Yes, you can also get that error if the steplen and stepspace will not allow the requested step rate
[03:05:11] <jp_> it's default is 1000 in pncconf. I didn't bother to change it
[03:06:03] <pcw_home> the hardware stepgen is actually OK with pretty high jitter but the driver part goes bad if you
[03:06:05] <pcw_home> dont limit its velocity corrections (of what it thinks is wrong due to jitter but is not actually wrong)
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[03:06:36] <pcw_home> 1000 is probably too fast for a lot of drives
[03:07:11] <jdh> too fast would just miss steps, not cause the following error message?
[03:07:12] <jp_> checking thew drive specs right now
[03:07:45] <pcw_home> Yes it would likely cause missed steps (but not a following error)
[03:08:05] <jdh> guess I should have commented the change, you or andypugh told me what to change in mine to fix it (wasn't len/space though)
[03:08:37] <jp_> In pulse & direction mode, motor steps on falling edge of step input.0.25 μsec minimum pulse, 2 MHz max step rate. 1 μsec minimum setup time, 50μs minimum hold time for direction signal.
[03:09:25] <skunkworks__> pcw_home: just certain motherboard combos?
[03:09:43] <pcw_home> so far only Atom
[03:10:00] <pcw_home> (that I know of)
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[03:10:02] <skunkworks__> where you able to try a external video card?
[03:10:22] <pcw_home> Not yet, maybe tommorow
[03:10:48] <jdh> I was going to buy another d525. Guess I'll wait :)
[03:12:09] <pcw_home> stepgen maxaccel set to 0 (no limit) , stepgen maxvel set with no headroom are other reasons for a stepgen following error
[03:13:06] <pcw_home> the d525 is OK just dont expect it to run servo threads faster than about 1.5 KHz
[03:16:38] <jp_> well that works much better
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[03:18:17] <tjb1> Do you still use collars and thrust bearings to contain ball screws?
[03:18:36] <jp_> yep
[03:20:53] <jp_> unless you have coin to spare for angulars
[03:21:30] <tjb1> http://www.ebay.com/itm/1-anti-backlash-ballscrew-RM1605-450-C7-for-CNC-XYZ-/250594423125?pt=LH_DefaultDomain_0&hash=item3a58977155#ht_551wt_1165
[03:21:49] <tjb1> So for that, I would need 16mm collars, 16mm thrust bearings, 16mm support block
[03:22:08] <jdh> he sells them all together also
[03:22:58] <jdh> 250818484320
[03:23:02] <tjb1> http://www.ebay.com/itm/1antibacklash-ballscrew-1605-430mm-C7-BK-BF12-coupler-/250528368890?pt=LH_DefaultDomain_0&hash=item3a54a788fa#ht_608wt_1165
[03:23:09] <jp_> I use thrust on my knee mill with no issues
[03:23:22] <jdh> or that
[03:23:49] <tjb1> Well I am just a little confused as to how im going to attach it to my stepper unless I have them machine the end or make a special adapter from 16mm-3/8"
[03:24:05] <tjb1> I know you cant take it apart...
[03:24:12] <jdh> have him machine the end.
[03:24:31] <jp_> You can take them apart
[03:24:46] <tjb1> Without dropping balls everywhere?
[03:24:48] <jdh> those are already machined for the bearings
[03:25:00] <jp_> that what the bucket underneath is for
[03:25:26] <jdh> they are finicky to repack, but not a big deal
[03:25:27] <tjb1> jdh: are those bearings also thrust?
[03:25:46] <jp_> it's not a job you want to rush but it can be done
[03:26:11] <jdh> one end is radial only, one end has thrust
[03:26:40] <jp_> im sure the screw is barely case hardened as well so cutting the ends would not be a big deal either
[03:26:47] <jdh> I think connor got a set from him like that. Might ask him.
[03:27:10] <tjb1> Wonder how high those blocks are
[03:27:18] <jdh> not a big deal, but also not enough $$ to worry about having them do it.
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[03:28:09] <jdh> I got AC bearings for my mill. They were fairly cheap.
[03:28:48] <tjb1> ac bearings?
[03:28:55] <tjb1> Oh angular contact
[03:29:09] <jdh> doubt they really added much over the plain thrust bearings.
[03:29:27] <tjb1> Connor: you awake?
[03:30:10] <tjb1> Im thinking its not worth it to go for ball screw over acme on my Z
[03:31:29] <jp_> where is a good place for acme with preload nuts?
[03:32:07] <tjb1> anti backlash?
[03:32:14] <jp_> yes
[03:32:37] <tjb1> cncrouterparts has them from dumpstercnc
[03:33:02] <tjb1> http://www.cncrouterparts.com/dumpstercnc-acme-assembly-p-36.html
[03:34:35] <tjb1> Damn I dont know, might be very close to just go with ballscrew
[03:35:26] <jp_> 5/8 rolled ball screws at mcmaster carr are pretty cheap too
[03:35:43] <tjb1> $32 for that anti backlash nut, $16 for the acme screw, $30 for 2 bearing blocks, $8 for 2 thrust bearings, $6 for 2 collars
[03:36:02] <tjb1> thats $90...
[03:36:32] <tjb1> Plus some type of coupler
[03:36:38] <tjb1> I think its $20 for an oldham
[03:36:51] <jp_> http://www.mcmaster.com/#ball-screws/=iu7yxu
[03:37:55] <jp_> for some reason 5/8 is the cheapest
[03:38:10] <jp_> made by thompson
[03:38:28] <tjb1> $36 for 2 ft, $30 for nut without flange…no idea on support blocks
[03:40:03] <jp_> not much to make support blocks if you have a friend with a mill
[03:40:11] <tjb1> If I go with thrust washers, can I just have 2 of them with each on the inside of the support blocks
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[03:40:34] <tjb1> Or do you need one on each end of support blocks
[03:40:54] <jp_> use a regular bearing at one end and trap the other between thrusts
[03:41:41] <tjb1> So the block near the stepper would just have a radial bearing and the other end would have the radial and a thrust on each side with collars
[03:42:02] <jp_> the other way
[03:42:16] <tjb1> constrained at the stepper side?
[03:42:21] <jp_> yes
[03:42:27] <tjb1> Alright, thanks :)
[03:42:38] <jp_> no problem
[03:43:28] <tjb1> That just took care of my Z
[03:44:50] <jp_> cool want finish of my x y and z for me
[03:44:57] <jp_> lol
[03:45:19] <tjb1> I have enough problems :)
[03:45:33] <jp_> i hear ya
[03:45:47] <tjb1> I have to buy everything within a budget of $2300
[03:45:59] <jp_> hey thats not bad
[03:46:09] <tjb1> Its gonna be tight
[03:46:32] <jp_> rack and pinion on the others?
[03:46:38] <tjb1> Yep
[03:46:44] <jp_> perhaps timing belt?
[03:47:06] <tjb1> The rack is surprising cheap
[03:47:23] <tjb1> $250 for 26' delivered
[03:47:38] <jp_> how accurate?
[03:48:55] <tjb1> http://www.mooregear.com/gearracks.html
[03:49:04] <tjb1> I dont see anything but I think just about everyone uses them
[03:51:00] <jp_> true
[03:51:36] <jp_> what are you planning to use for guides
[03:52:27] <tjb1> the cncrouterparts carriages
[03:53:56] <jp_> check out anheim automation they have low cost thk style rails
[03:55:06] <tjb1> well my x is 10' long and y is 6' long
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[03:57:33] <jp_> what r u using for motors and drives
[03:57:54] <tjb1> nema 23 and gecko g540
[03:58:31] <r00t4rd3d> for that big i would use 32
[03:58:58] <tjb1> Its dual drive on x
[03:59:02] <tjb1> this is also a plasma table ;)
[03:59:07] <r00t4rd3d> oh
[03:59:28] <jp_> thats why i would of went timing belt
[04:00:08] <r00t4rd3d> Who knew who helen brown was before today?
[04:00:18] <tjb1> I still dont know who that is
[04:00:23] <r00t4rd3d> lol me either
[04:00:43] <r00t4rd3d> all the news sites keep calling her a legend and shit
[04:01:03] <r00t4rd3d> never heard her name before ever
[04:01:36] <tjb1> What is your method for the timing belt jp_
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[04:02:42] <jp_> if you just moving a torch around i would just use a timing belt drive on x and y
[04:02:53] <tjb1> well it will also do router
[04:03:39] <jp_> im building one next to test out the belts as arouter my experience says it should be fine
[04:03:57] <tjb1> Do you have a picture of how this works?
[04:04:22] <jp_> juat a loop of belt pulley at each end
[04:04:32] <jp_> motor drives the pulley
[04:04:48] <jp_> ends attach to the axis its moving
[04:05:24] <tjb1> Sounds easy
[04:05:50] <tjb1> Where is a source for the timing belt?
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[04:06:33] <jp_> ive positioned 1000lbs of glass moving at 10kmph stopping within .001 on automated machinery
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[04:06:55] <jp_> mcmaster or sdp si
[04:08:39] <tjb1> http://www.mcmaster.com/#timing-belts/=iu8ffn
[04:08:43] <tjb1> That what I am looking for?
[04:09:28] <jp_> http://www.mcmaster.com/#timing-belts/=iu8e2q
[04:09:45] <jp_> urethane with kevlar
[04:10:19] <tjb1> White belt
[04:10:42] <jp_> havent tried it out on a router yet but im sure it would work. steppers might not but with servos
[04:10:45] <jp_> yes
[04:10:59] <tjb1> .2 pitch, 1/2" wide?
[04:11:19] <jp_> 1"wide
[04:11:42] <jp_> L series
[04:11:46] <tjb1> Thats more than the rack and pinion
[04:11:52] <Jymmm> tjb1: http://www.youtube.com/watch?v=5RBne0EXbTc
[04:12:45] <tjb1> I suppose I would have to add something to keep it tensioned because of the speed of the router
[04:13:17] <jp_> yes one end of the belt would be fixed the other tensioned
[04:13:17] <Jymmm> router?!
[04:13:37] <Jymmm> your moving a router using a belt?!
[04:13:39] <tjb1> jp_: I would have nearly $400 in belting
[04:13:42] <tjb1> No
[04:14:26] <Jymmm> theres no spring tension, just adjust the belt when installed
[04:14:27] <tjb1> Just exploring options Jymmm
[04:14:49] <Jymmm> belt for a router is not an option, too much mass.
[04:14:54] <jp_> you can tell how much i dont like racks eh!
[04:14:56] <Jymmm> and force
[04:15:03] <jp_> not true
[04:15:27] <tjb1> My gantry is probably going to be around 70#
[04:16:04] <Jymmm> 2.5HP router 25000 RPM, cutting into material is too much force for a belt
[04:16:27] <Jymmm> unless you like to replace them often
[04:17:24] <jp_> im sure it could work fine soon i will know the answer
[04:18:54] <tjb1> Well rack is cheaper so I am going that direction :D
[04:19:19] <Jymmm> Everything that we tell you is what we consider "best practices". Of course, only YOU know your own requirements, so you may feel you need to do something we told you not to. Just don't say we didn't warn you.
[04:19:21] <tjb1> I had a good idea for running the belt through the extrusion
[04:19:22] <jp_> i dont blame you
[04:20:32] <toastydeath> lol a belt
[04:21:57] <jp_> Considering i build automated machinery for a living i can live with that. I have used that type of drive system on jobs and like the idea of trying it out on a router
[04:23:29] <Jymmm> jp_: you've used belts for something that exerts horizontal cutting forces in hard material?
[04:24:16] <jp_> forces and hard are relative terms when compared to design
[04:24:36] <Jymmm> jp_: Fine, give examples, video even better
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[04:28:46] <jp_> how bout i just build it and see where it goes. simply cant be done is not good enough for me. I need to see it. I understand forces are involved but i also understand materials are out there to deal with those forces
[04:30:11] <r00t4rd3d> my router is 26,000 rpms and I use a belt
[04:31:02] <jp_> What size motors r u using?
[04:31:06] <r00t4rd3d> 23
[04:31:15] <jp_> Max torque
[04:31:19] <r00t4rd3d> no clue
[04:31:33] <jp_> not much is what i was getting at
[04:31:51] <r00t4rd3d> Holding Torque: 90N.cm
[04:32:02] <jp_> gear ratio?
[04:32:09] <r00t4rd3d> 1;1
[04:32:23] <r00t4rd3d> well my motor has a 20 and my screw has a 22
[04:33:28] <r00t4rd3d> i use these
[04:33:29] <r00t4rd3d> http://www.cncrouterparts.com/nema-23-rp-motor-pulley-p-71.html
[04:33:53] <r00t4rd3d> this belt
[04:33:54] <r00t4rd3d> http://www.cncrouterparts.com/nema-23-rp-drive-belt-p-69.html
[04:36:32] <jp_> no what we were discussing was using a belt as a replacement for the rack
[04:37:16] <r00t4rd3d> oh
[04:37:25] <r00t4rd3d> i only read some stuff
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[05:03:24] <jp_> http://www.youtube.com/watch?v=T9QU3YQe-Sc&feature=related
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[06:46:31] <awallin> this would be nice for a small mill project http://www.toolingmachine.biz/?21,engraving-spindles-motor-sp80-iso20-2400
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[07:00:43] <archivist> awallin, did you see http://www.dieselrc.com/projects/cncspindle/
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[07:11:55] <awallin> nice. but no tool-changer :(
[07:12:36] <Jymmm> awallin: sure it does, just manual =)
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[07:15:12] <archivist> mandraulic tool change
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[08:04:06] <Loetmichel> mornin'
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[11:02:43] <jthornton> jp_,
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[11:20:14] <r00t4rd3d> wow after 3 months of fighting with Canon they finally give in
[11:20:50] <r00t4rd3d> paying for shipping and all :)
[11:21:04] <r00t4rd3d> all over a stupid Eye-Fi card
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[11:47:05] <r00t4rd3d> and i got them to change their policy :D
[11:47:28] <r00t4rd3d> "We have issued a Service Notice about that as you suggested."
[11:48:52] <awallin> what's the wifi card good for? studio work?
[11:49:22] <r00t4rd3d> so you dont have to take the card out or plug the camera in to get the pics off
[11:49:59] <r00t4rd3d> just get near your router and the pics transfer to a set location
[11:51:12] <r00t4rd3d> i dont have a studio or anything
[11:52:05] <r00t4rd3d> im not even sure why i own a dslr
[11:52:31] <r00t4rd3d> i use my p/s more then anything
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[12:18:54] <r00t4rd3d> http://techcrunch.com/2012/08/13/putting-an-end-to-the-biggest-lie-on-the-internet/
[12:19:06] <r00t4rd3d> finally someone does this
[12:20:11] <r00t4rd3d> http://tos-dr.info/
[12:31:40] <jp_> Jthornton: yes
[12:35:41] <jthornton> you see the timing belt with one belt glued down and one belt that goes over a pulley?
[12:35:53] <jthornton> no stretch
[12:36:08] <jp_> yes look at bell everman servo belt
[12:36:31] <jthornton> is that what you were talking about earlier?
[12:36:43] <jthornton> for your router belt?
[12:36:53] <jp_> yes and no thats one way to do it
[12:37:38] <jp_> my way was simpler im not convinced that cutting forces are that high for a belt
[12:38:06] <jthornton> what is your way?
[12:38:41] <jp_> just a simple loop and size the belt accordingly
[12:39:50] <jthornton> I used belts with the ends fixed and running under a roller then over the pulley then under another roller
[12:40:08] <jthornton> seems a loop would have double the stretch
[12:40:19] <jp_> it just frustrates me to hear it cant be done yet people forget that there using nema 23's to drive a router
[12:40:36] <jp_> yes it would
[12:40:39] <jthornton> only so much power there
[12:41:11] <jp_> my point exactly
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[12:41:28] <jthornton> my belt drive is on a plasma and I should have went one size bigger on the Y axis I get vibration from the belt if the ways are not perfectly clean
[12:41:52] <jthornton> btw, I build automation equipment too
[12:41:57] <jp_> how do you like it?
[12:42:34] <jthornton> what?
[12:42:43] <jp_> i use timing belts all the time on servo axis and get excellent performance
[12:42:54] <jp_> How do you like your belt setup
[12:43:11] <jthornton> I like it, it does what I expected it to do
[12:44:06] <jthornton> http://s47.photobucket.com/albums/f163/johnplctech/Plasma%20Cutter/
[12:44:29] <jthornton> that's how I built it
[12:44:56] <jp_> I actually replaced a festo $13000 linear motor with a servo and belt and got faster speeds and accels/decels
[12:45:34] <jthornton> yea linear motors are not very fast but they are accurate
[12:47:10] <jp_> yeah they also forgot to mention when the encoder gets damaged the whole motor needs to be replaced
[12:47:30] <jp_> wasn't happy
[12:47:50] <jthornton> I think the panasonics I use are the same way
[12:48:32] <jp_> nice setup on the plasma
[12:48:38] <jthornton> thanks
[12:49:09] <jp_> i think i will have to get back to work on mine once this 3d printer is done
[12:49:28] <r00t4rd3d> I hate when I give someone a stupid number on something I dont want to do and they take it.
[12:50:37] <archivist> profit!
[12:51:46] <r00t4rd3d> elaborate wedding sign.
[12:51:58] <jp_> jthornton: when you do gantrys in emc do you just take the command and send it to two septate stepgens?
[12:52:24] <jthornton> that's the easy way
[12:52:38] <jthornton> mine is driven by one motor and a jack shaft
[12:52:51] <jp_> ah
[12:53:05] <jthornton> or split one stepgen out to 4 pins
[12:53:41] <jp_> how do you like the 7i76?
[12:53:53] <jthornton> I like it a lot
[12:54:15] <jp_> just started to play with it so far so good
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[14:22:45] <r00t4rd3d> http://www.kickstarter.com/projects/digistump/digispark-the-tiny-arduino-enabled-usb-dev-board
[14:23:03] <r00t4rd3d> i hate smd's but that is cool
[14:25:59] <jdh> what's to hate?
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[14:29:26] <Jymmm> Whys does it say this?
[14:29:35] <Jymmm> https://gist.github.com/86816f8905ae6b3273ba
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[15:25:01] <awallin> anyone used this? http://ugracnc.com/ just found it, is that a new website/store ?
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[15:31:54] <DJ9DJ> tag
[15:32:39] <Jymmm> DJ9DJ: WHACK!
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[15:34:04] <DJ9DJ> hi Jymmmmmm
[15:34:10] <Jymmm> =)
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[15:36:31] <r00t4rd3d> awallin, not new.
[15:36:50] <r00t4rd3d> ive gotten some things off there ebay store
[15:36:59] <r00t4rd3d> limit switches
[15:38:20] <r00t4rd3d> http://www.ebay.com/sch/*www.ugracnc.com*/m.html?_nkw=&_armrs=1&_from=&_ipg=25&_trksid=p3984.m1439.l2654
[15:38:27] <r00t4rd3d> their ebay stuff
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[16:49:11] <Jymmm> "Blue Bag Policy", my only question is how do you use/hold the blue bag, drop trough, do your business, when hanging hundreds of feet off the ground on the side of a cliff/mountain? http://www.nps.gov/olym/planyourvisit/wilderness-sanitation.htm
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[17:06:22] <JT-Shop> that's what buddies are for...
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[17:08:08] <IchGuckLive> hi all
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[17:23:10] <jp_> JT-Shop: heres my router gantry https://picasaweb.google.com/103502607515689372041/LinuxcncStuff#5776580329666349778
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[17:24:09] <jthornton> he went to take a nap... nice gantry with linear rails and all
[17:24:18] <IchGuckLive> ip_ liniar only on forground or also back
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[17:24:50] <jp_> only on front dont need them on back
[17:25:14] <IchGuckLive> ball spindle ?
[17:25:26] <skunkworks> question linux related... Is it possibel for linux to change the tmp directory permissions when the volume runs out of space?
[17:26:06] <IchGuckLive> ip_ 2 steppers for X
[17:27:26] <IchGuckLive> movement on Rack liniar Gear
[17:28:55] <jp_> nope plan on using belts
[17:29:22] <IchGuckLive> X-size
[17:30:00] <jp_> i have material for 10 ft if i want but probably just 8
[17:30:20] <IchGuckLive> Why not trapezional on 4mm tread this gives you a very accuracy at 400steps and lots of speed
[17:31:01] <IchGuckLive> necouse imperial first
[17:32:07] <jp_> ill probably go metric just have lots of imperial laying around
[17:32:19] <IchGuckLive> B)
[17:33:02] <IchGuckLive> the tread leadscrew and nut is so cheep here also Ballscrews drop in price rapidly but only 5mm thread
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[17:40:50] <L84Supper> tzerslotten? T-nuten?
[17:43:19] <L84Supper> skunkworks, I could see writing script to check on the space left in the temp dir and then having it change the permissions at some trip point
[17:44:24] <archivist> you need more than permissions fixing when running out of space
[17:44:50] <L84Supper> yeah, I'm not sure what he's actually trying to end up doing
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[17:45:16] <skunkworks> Thanks.. We had a server that we don't manage where the apache error_log file filled up the drive (140gb) after fixing that - the timp file permissions needed to be fixed also.
[17:45:29] <skunkworks> *tmp
[17:45:51] <archivist> my initiation to disk full was the messages to root filling up what little was left!
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[17:46:39] <archivist> making logging in specially hard to scrub some
[17:46:46] <L84Supper> I've been stung by similar issues, updates that fill up the tmp or similar
[17:48:22] <archivist> skunkworks, are you on some vm/whatever where they borked the permissions when getting full, complain
[17:48:45] <skunkworks> The company that set it up made some snide remark that we must have been playing with the permissions. (but honestly - we don't touch it)
[17:48:56] <skunkworks> No VM
[17:49:24] <skunkworks> we did figure out what was causing the space issue though.
[17:49:33] <archivist> Ive never heard of /tmp having problems like that
[17:49:43] <skunkworks> Neither does google.
[17:49:55] <skunkworks> whatever - fixed now I guess
[17:50:12] <archivist> seen some stupid attempts by some admins at controlling users though
[17:50:35] <archivist> poor use of quotas being one
[17:50:43] <skunkworks> heh
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[17:52:45] <L84Supper> http://www.youtube.com/watch?feature=player_embedded&v=4HOi6Az531A Metal Laser Sintering Hybrid Milling Machine, looks like I'll have to make my own if I need >250mm travel
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[18:01:11] <IchGuckLive> L84Supper: not a good stategy for the layers
[18:02:08] <IchGuckLive> you can see this at the expo in Germany this year 2 tiimes in Stutgard and frankfurt
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[18:07:38] <IchGuckLive> ls -l
[18:07:42] <L84Supper> IchGuckLive, whats not good about it?
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[18:08:33] <IchGuckLive> i see the futher video shows a better one for the circle so i guess they rough in lines and then harden out in shape
[18:10:58] <L84Supper> photopolymers + metal + mill is what I need
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[19:25:27] <JT-Shop> does a rotary axis break the naive cam dectector?
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[19:42:21] <micges> JT-Shop: yes
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[19:53:38] <JT-Shop> I have a guy with a 3 axis machine X Z and A any tips to use for that setup in coordinated motion?
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[19:54:19] <jp_> what control
[19:54:59] <JT-Shop> EMC
[19:55:25] <jp_> what is it a lathe
[19:56:09] <JT-Shop> a weird machine like a mill but no Y axis and A is in line with X
[19:57:45] <micges> what is the problem?
[19:58:31] <JT-Shop> the machine speeds up and down, I think the Z axis is slow
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[20:01:37] <JT-Shop> at first I told him to use G64 Pn but got to thinking that the rotary my break that but now he says that it helped
[20:03:22] <JT-Shop> I see his max acceleraton on X is 5 and Z is 1 so that might be the problem
[20:03:23] <micges> probably when he use A axis then all axis slow down
[20:03:46] <JT-Shop> I think the A is moving all the time
[20:03:47] <micges> yes it could be also
[20:06:16] <archivist> often recommended to use inverse time mode
[20:10:18] <archivist> just trying an experiment, latency-test during a system update
[20:11:13] <JT-Shop> he is using G94, there is a combination of X Z and A moves on each line of the sample code I have here
[20:12:01] <JT-Shop> I don't know if his CAM software can properly calculate the F for inverse time mode
[20:13:06] <archivist> the rotary currently has no clue of radius and correct F using the normal mode
[20:13:26] <archivist> feature :(
[20:14:08] <cradek> he's probably misunderstanding how F works
[20:14:37] <JT-Shop> hows that?
[20:14:45] <archivist> I wonder if the css for a lathe could be show horned in
[20:14:52] <archivist> shoe
[20:15:09] <cradek> http://www.linuxcnc.org/docs/html/gcode/machining_center.html#sub:feed-rate
[20:16:47] <JT-Shop> with an X Z and A move on every line the A should move to the end point at a speed to keep up with X and Z right?
[20:17:39] <cradek> you say an A *move* on every line. do you actually mean an A *word* on every line?
[20:17:57] <JT-Shop> yes
[20:18:01] <JT-Shop> X0.511 Z-0.1355 A4.12 F20.5
[20:18:03] <cradek> it's moves that are important, not the presence or absence of words
[20:18:09] <JT-Shop> X0.4772 Z-0.1329 A3.81
[20:18:26] <JT-Shop> every line the A is different
[20:19:23] <cradek> ok in G94 that means the XZ-only line is requested to be at 20.5 inches/minute
[20:19:38] <cradek> but it sure may be slower to wait for A
[20:20:22] <JT-Shop> and if A is not the slow one it will just keep up?
[20:20:58] <cradek> for this gcode to work right (assuming you want constant cutter-to-workpiece velocity) I'd expect a different F word for every line, whether in inverse mode or not
[20:21:25] <cradek> feed is obviously tricky in this situation
[20:22:01] <cradek> yes if A is infinitely fast you'll get your 20.5 in the XZ plane and A will follow it at whatever speed necessary to stay coordinated
[20:23:03] <cradek> like archivist says, 5 axis cam always generates G93 code for this reason
[20:23:42] <JT-Shop> I think I'm understanding now
[20:24:30] <cradek> if the A axis is a worm he might be able to set the accel VERY high
[20:25:02] <JT-Shop> its 4 times faster than the X now
[20:25:14] <cradek> only 4??? you know it's in degrees right?
[20:25:50] <JT-Shop> yes, but didn't take degrees into account
[20:26:16] <JT-Shop> degrees per second right?
[20:26:31] <JT-Shop> for max velocity?
[20:26:41] <cradek> most machines will have MANY more (steps or counts)/inch than /degree, so scale on rotaries will look very low and vel/acc will look very high
[20:26:44] <cradek> yes
[20:27:25] <JT-Shop> yes scale is 1/10 of the X
[20:28:07] <cradek> he may have his vel/acc really wrong then
[20:28:20] <JT-Shop> thanks
[20:28:30] <cradek> that will sure make it worse, but I still suspect gcode feed rate problem too
[20:28:32] <cradek> welcome
[20:28:48] <JT-Shop> I'll pass all this on to him
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[20:42:59] <DJ9DJ> gn8
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[21:12:11] <Tom_itx> JT-Shop, tried a couple things for static ip today with no luck so far
[21:12:14] <Tom_itx> http://askubuntu.com/questions/4826/switching-a-server-to-static-ip-from-dhcp
[21:12:16] <Tom_itx> was one
[21:13:05] <atom1> /usr/share/doc/network-manager/README.Debian
[21:13:09] <atom1> was another one
[21:13:49] <Tom_itx> still haven't found the magic file
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[21:17:01] <Tom_itx> the first time i tried the ifdown eth0 it said it wasn't configured yet however it had a dynamic ip assigned to it and displayed it with ifconfig
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[21:20:11] <archivist> Tom_itx, I just use the graphical ip setting, it just worksforme has this changed with later versions
[21:20:31] <Tom_itx> where would that be found?
[21:20:42] <Tom_itx> 10.04 live cd install
[21:20:55] <Tom_itx> i think i've been thru them but may have missed something
[21:21:04] <archivist> system/administration/network
[21:21:30] <atom1> i have network tools
[21:21:41] <archivist> wired connection/properties
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[21:22:39] <archivist> unclick roaming, set some sensible ip and mask numbers
[21:23:17] <atom1> i'm not finding that
[21:23:22] <archivist> and set the drop down to fixed ip
[21:23:23] <atom1> in network tools
[21:23:39] <atom1> i pulled up ethernet eth0
[21:23:44] <atom1> under devices
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[21:24:19] <atom1> but haven't found a place to edit it
[21:25:59] <atom1> ok i may have it here
[21:26:15] <atom1> under IPv4 ?
[21:26:46] <archivist> mine is older so only ipv4 here
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[21:27:02] <atom1> looks like it's the same under 10.04
[21:27:08] <atom1> i'll give this a try
[21:28:00] <archivist> its the first job I do when I fire up a new box to get connected as I only run fixed ip here
[21:28:15] <archivist> I hates dhcp
[21:28:19] <atom1> i wonder why it keeps ignoring the interfaces file
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[21:28:39] <atom1> ok, i'll reboot and see how it comes up
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[21:30:32] <Tom_itx> it still came up under dhcp
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[21:33:39] <Tom_itx> what's that program name? maybe i can sudo run it in a terminal
[21:33:51] <Tom_itx> it never asks for admin password
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[21:34:08] <archivist> you unlock it
[21:34:16] <archivist> then it asks
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[21:34:51] <atom1> i don't see a place to do that
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[21:36:27] <Tom_itx> i'll look it over after bit. supper is calling me
[21:37:13] <archivist> are you using network from system administration NOT network tools
[21:37:26] <archivist> bed is calling me
[21:38:01] <archivist> and the other box running ./configure
[21:38:09] <Jymmm> who would use SS shim stock typically?
[21:38:24] <Jymmm> 0.015"
[21:38:36] <Jymmm> 0.010 - 0.015"
[21:39:30] <Tom_itx> archivist yes
[21:39:38] <Jymmm> I want to pick up a piece of scrap before buying a whole roll.
[21:39:39] <Tom_itx> thanks.. i'll work on it this evening
[21:39:51] <Tom_itx> Jymmm get a friggin feeler gage
[21:39:54] <Tom_itx> dammit!
[21:40:04] <Jymmm> Tom_itx: 2sf
[21:42:22] <JT-Shop> maintenance men Jymmm
[21:42:59] <Jymmm> JT-Shop: what would be the application?
[21:43:30] <JT-Shop> shimming up machinery to line up shafts and such
[21:44:48] <Jymmm> JT-Shop: so no fabricator I could buy a couple of sq ft scrap from?
[21:44:55] <Jymmm> maybe titanium too
[21:45:07] <Jymmm> I just dont know what idustries use them
[21:45:11] <Jymmm> industries
[21:46:10] <JT-Shop> only if he makes things that need shimming up like skid mounted motor/pump etc
[21:47:22] <syyl> tool/die guys have also shim stock availible
[21:47:46] <syyl> almost every mechanic guy Oo
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[21:50:00] <archivist_hobbin> xchat installed and tested :)
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[21:53:23] <JT-Shop> an authentic Great Plains Indian Dreamcatcher (made in china)
[21:55:39] <archivist> latency-test stopped updating during the upgrade of the other box
[21:56:38] <archivist> was the fresh install upgrade of the livecd :)
[21:59:23] <archivist> is it worth adding to the latency-test docs that abuse does not include upgrading the os
[22:06:55] <atom1> archivist, all i have under system administration is network tools and under system preferences there is network connections
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[22:07:19] <atom1> the latter is where i was adding a static ip but it didn't appear to take
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[22:16:01] <archivist> I wonder why I prefer 8.04 :)
[22:19:51] <Tom_itx> heh
[22:20:04] <Tom_itx> i'm still looking it over
[22:22:10] <Tom_itx> under IPv4 the options i have are automatic DHCP, automatic DHCP addresses only, Manual, Shared to other computers
[22:22:21] <Tom_itx> i'm guessing manual is what i'm after
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[22:26:22] <Tom_itx> http://tom-itx.dyndns.org:82/
[22:26:42] <Tom_itx> ok JT-Shop
[22:26:55] <Tom_itx> that's where you edit the ip
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[22:43:22] <JT-Shop> yo
[22:43:52] <JT-Shop> hey I have a web site just like that
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[22:45:51] <Tom_itx> change the ip from the menu
[22:46:23] <Tom_itx> system -> preferences -> network connections
[22:47:24] <Tom_itx> edit eth0 IPv4 settings to manual and enter the info there
[22:48:22] <JT-Shop> ok
[22:48:51] <Tom_itx> i still don't know why it ignores the interfaces file
[22:50:57] <JT-Shop>
[22:51:54] <Tom_itx> is that static now?
[22:52:06] <Tom_itx> no, that ip isn't
[22:52:16] <Tom_itx> that's why you wanna use dyndns
[22:52:22] <JT-Shop> yea but set in the router to be static
[22:53:01] <Tom_itx> the outbound one?
[22:53:28] <Tom_itx> your local 192.168.... can be but is the outbound one?
[22:53:30] <JT-Shop> yea
[22:54:33] <Tom_itx> you might wanna shrink those
[22:55:06] <JT-Shop> yea, just installing gimp now
[22:55:19] <JT-Shop> last one is the 7i77 installed
[22:55:22] <Tom_itx> 2 and 3 aren't visible
[22:56:02] <JT-Shop> i just deleted a couple so refresh
[22:56:08] <Tom_itx> 324 & 325 not found
[22:56:18] <elmo40> JT-Shop: what is the large capacitor for? filtering DC power?
[22:56:45] <Tom_itx> that or zapping your tongue
[22:57:06] <elmo40> nothing like a good sizzle every now and then ;)
[22:57:08] <JT-Shop> that's one of the three parts of the power supply for the drives
[22:58:14] <elmo40> is this for steppers?
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[22:58:58] <Tom_itx> so you run the db25 out the pc to the 7i77 from the 5i25
[22:59:12] <Tom_itx> or is your pc inside a control box?
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[22:59:47] <elmo40> I like the large cables on the lower right :)
[22:59:52] <JT-Shop> atm the pc is sitting on the rear electrical cabinet
[22:59:54] <elmo40> screw on connectors?
[23:00:06] <JT-Shop> mil connectors
[23:00:22] <elmo40> have built in shielding, I take it
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[23:01:30] <Tom_itx> i rewired all my stuff using shielded cable
[23:01:34] <Tom_itx> it helps
[23:02:03] <JT-Shop> ok refresh I rotated and made them smaller
[23:02:31] <JT-Shop> I assume at this point the pc will be on top of or inside that cabinet
[23:02:57] <JT-Shop> most of the stuff on the lower left will go, the vertical cards are the drives and they stay
[23:03:47] <JT-Shop> look at all the M3 stand offs in 26
[23:03:51] <Tom_itx> what do those relays do?
[23:04:06] <JT-Shop> on the board?
[23:04:12] <Tom_itx> yeah
[23:04:18] <Tom_itx> psu?
[23:04:29] <Tom_itx> there's a couple mov's on there too
[23:04:31] <JT-Shop> one is for power supply for the drive
[23:04:39] <JT-Shop> mov?
[23:04:46] <Tom_itx> the red disks
[23:04:56] <JT-Shop> oh
[23:05:09] <JT-Shop> I thought they were caps
[23:05:16] <Tom_itx> i doubt it
[23:05:32] <Tom_itx> they might be but those are usually baby poo brown
[23:05:41] <JT-Shop> ah ok
[23:06:16] <Tom_itx> surge clamps
[23:06:37] <Tom_itx> open your surege strip and you'll find some more
[23:06:43] <Tom_itx> along with some chokes etc
[23:07:38] <JT-Shop> I was just thinking I'd put a SSR in there to turn on the power supply controlled by the 7i77
[23:07:47] <JT-Shop> drive enable
[23:11:43] <JT-Shop> the only thing left to sort out is where the encoders get the 5v from
[23:12:09] <Tom_itx> get a little smps like i did
[23:12:20] <Tom_itx> it will take like 35v input
[23:12:24] <Tom_itx> i forget exactly
[23:12:38] <JT-Shop> got a link?
[23:12:45] <JT-Shop> the power supply is 120v
[23:12:58] <Tom_itx> no DC lower than that?
[23:13:17] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/misc_stuff/5v_switcher.jpg
[23:13:22] <Tom_itx> those are what i used
[23:13:23] <JT-Shop> 24v on field power
[23:13:29] <Tom_itx> i could send ya one if you want
[23:13:36] <Tom_itx> i took the input cap off
[23:13:43] <Tom_itx> since it's only rated for 16v
[23:13:45] <JT-Shop> tiny little buggers
[23:13:56] <Tom_itx> good for like 2.5 - 3 A
[23:14:14] <JT-Shop> it only switches 16v?
[23:14:24] <Tom_itx> no it's a 5v reg
[23:14:40] <Tom_itx> but i made it for something else and only needed 16v caps on the input
[23:14:48] <JT-Shop> all my stuff is 24v on the coil side
[23:14:51] <Tom_itx> the input on yours will be filtered anyway
[23:14:54] <Tom_itx> that's fine
[23:15:01] <Tom_itx> mine is 25v input
[23:15:19] <JT-Shop> and it will switch 120vac?
[23:15:22] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/cnc/psu/control5.jpg
[23:15:32] <Tom_itx> you can see it just left of the mesa cards
[23:15:41] <Tom_itx> no it needs DC in
[23:15:49] <Tom_itx> lemme find the data sheet
[23:15:55] <jdh> http://www.mpja.com/5V-4A-Desktop-Supply-Cisco/productinfo/18464+PS/
[23:16:04] <JT-Shop> I had to squint to see it lol
[23:16:45] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/misc_stuff/switcher.png
[23:16:48] <Tom_itx> there's the schematic
[23:18:47] <Tom_itx> max supply voltage 45v
[23:19:02] <Tom_itx> http://www.ti.com/lit/ds/symlink/lm2596.pdf
[23:19:34] <JT-Shop> I'll just stick to the SSR's I have laying about
[23:19:41] <JT-Shop> thanks for the offer
[23:19:47] <Tom_itx> np
[23:20:05] <Tom_itx> i could have put it on my main supply but didn't want to push the limit on it
[23:20:15] <Tom_itx> so i put a cap on the centertap with a diode
[23:20:23] <Tom_itx> and got 25v for it
[23:20:41] <Tom_itx> that's what the cap by itself in the box is for
[23:22:58] <Tom_itx> http://tom-itx.dyndns.org:81/~webpage/misc_stuff/board3.jpg
[23:23:01] <Tom_itx> that was the prototype
[23:23:54] <JT-Shop> your a wiz at that stuff and I struggle with it like understanding inverse time mode lolo
[23:24:55] <Tom_itx> they give you the design layout
[23:25:07] <Tom_itx> and what parts to use
[23:25:13] <JT-Shop> that helps
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[23:26:51] <Tom_itx> most of those mfg have a design page
[23:27:17] <JT-Shop> yea, but you have to know a little about what your looking at to make sense of it all
[23:27:57] <Tom_itx> i should put a few more of those together
[23:28:05] <Tom_itx> i dunno how many boards i have
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[23:34:46] <elmo40> I might be buying an SL-3 mori seiki for $500 http://www.kgimachinetool.com/images/machines/SL3-002.jpg
[23:35:15] <Tom_itx> you couldn't hardly go wrong for that
[23:35:19] <Tom_itx> if you can move it
[23:35:35] <Tom_itx> chip conveyor n all
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[23:37:08] <asdfasd> anyone good in swich mode power supply?
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[23:39:24] <JT-Shop> sop is to just ask your question here
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[23:41:04] <Tom_itx> elmo40 does it come with a bar feed for that :)
[23:42:05] <asdfasd> just modified PC power supply for something else, there is an inductor between the diode rectifier and output capacitor, and that inductor is heating too much, Im not sure wire or core, how to reduce that heat
[23:43:07] <JT-Shop> elmo40: is that a hydrolic chuck?
[23:43:39] <JT-Shop> hydraulic
[23:44:51] <JT-Shop> Tom_itx: isn't there an electronics channel of some sort?
[23:44:56] <Tom_itx> asdfasd i dunno if this will help or not: http://www.wikihow.com/Convert-a-Computer-ATX-Power-Supply-to-a-Lab-Power-Supply
[23:45:08] <Tom_itx> JT-Shop yes but ##electronics is sh**
[23:45:21] <JT-Shop> ah ok
[23:45:27] <Tom_itx> you can get answers a couple other place like #robotics or #seattlerobotics
[23:45:32] <Tom_itx> possibly #avr
[23:46:12] <Tom_itx> asdfasd too much heat may mean too much load
[23:46:42] <r00t4rd3d> lol
[23:47:53] <Tom_itx> JT-Shop you may get an answer in ##electronics if you happen in when they're OT but generally they're not
[23:48:18] <asdfasd> I did something similar as in this project, but the load is well below the rated, the PC psus are just tuu much over rated
[23:49:21] <asdfasd> rated at 22A, I do continuous load at 10A and only that inductor is heating
[23:49:55] <asdfasd> I tried 2 wires in prallel still heating the same
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