#linuxcnc | Logs for 2012-12-22

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[00:05:37] <Connor> Looking at getting a Granite Surface Plate... Looks like they have different grades.. what grade do I want to go with?
[00:08:07] <tjb1> Best you can afford
[00:13:04] <Connor> Well, From what I'm reading.. AA is Lab grade, A is Inspection and B is toolroom..
[01:08:46] <postaL> If anyone needs a dewalt dwp611 they're cheap right now
[01:08:47] <postaL> http://www.amazon.com/gp/product/B0048EFUV8/ref=oh_details_o00_s00_i00
[01:09:00] <postaL> $119 - $25 (spend $100 or more on dewalt tools, get $25 off from amazon)
[01:09:28] <tjb1> Now you tell me
[01:10:56] <postaL> just saw it as i placed the order
[01:11:01] <postaL> didn't even know abou tit
[01:11:06] <postaL> it just said, "promotion -$25
[02:10:17] <DJ9DJ> moin
[02:10:23] <tjb1> evenin
[02:16:40] <DJ9DJ> :)
[02:20:42] <tjb1> Phone didn't download the other part for the tethering app to unlock full version :/
[08:36:31] <r00t4rd3d> Right Now
[08:36:31] <r00t4rd3d> Updated: Dec 22, 2012, Blizzard conditions are occurring at times.
[08:43:06] <IchGuckLive> jdh: at your request yesterday the TUT -> http://www.youtube.com/watch?v=mTbh47AFgi8&feature=youtu.be&fmt=22
[08:59:54] <jdh> cool
[09:00:30] <IchGuckLive> as your request
[09:01:00] <jdh> actually, I just wanted someone to do all the work for me while I sit here :)
[09:01:10] <jdh> but, learning is ok too.
[09:01:37] <IchGuckLive> as all want that
[09:56:11] <IchGuckLive> done ! Linuxcnc goes 3D A Axis Sculping http://mechmo.de/linuxcnc3d.png
[09:56:44] <IchGuckLive> as you se öeft down the lines are selectable
[09:57:21] <IchGuckLive> as the liveplot prits live data there is no Y moving i will see how i overcome this
[11:47:54] <awallin_> IchGuckLive: what exactly is new in your 3D A-axis figure?
[11:49:13] <IchGuckLive> it showes a Lathe sculp G-code in 3D
[11:49:34] <IchGuckLive> while the G-code runs in only the lathe axis
[11:49:41] <IchGuckLive> XZ A
[11:49:54] <awallin_> what did you use to generate the g-code?
[11:50:37] <IchGuckLive> awallin_: do you know what "self.lp.call()" holdes in glcanon
[11:51:01] <awallin_> no.. do you have a link to the code?
[11:51:03] <IchGuckLive> awallin_: i use ProE for this but Deskproto can do this 2
[11:52:09] <IchGuckLive> awallin_: the Glcanon or the G-code
[11:52:27] <awallin_> oh, glcanon..
[11:53:42] <IchGuckLive> if self.sculpA:
[11:53:44] <IchGuckLive> z_orig = z
[11:53:46] <IchGuckLive> y = math.sin(math.radians(a)) * z_orig
[11:53:47] <IchGuckLive> z = math.cos(math.radians(a)) * z_orig
[11:54:14] <IchGuckLive> thats all in side Glcanon .py Glcanon Straight feed
[11:55:20] <IchGuckLive> the trigger is AXIS,SCULPA
[11:55:29] <IchGuckLive> in Def comment
[12:02:32] <andypugh> IchGuckLive: What we are puzzled about is what it does differently to the existing rotary-axis previews (triggered by [DISPLAY] GEOMETRY=
[12:03:43] <IchGuckLive> let me have a look at this feather
[12:06:44] <IchGuckLive> andypugh the geometry does not involve 3D views in G-code only displayes in XYZ coordinates UVW kinetik
[12:07:42] <IchGuckLive> ao if your g-code holds only XZ A coordinates it will not show you in the A Rotation as there is a Y involved to show up
[12:09:43] <IchGuckLive> let me do a quick Vid to show up
[12:09:52] <jepler> stepper_xyza specifies 0x00000007
[12:09:52] <jepler> ...skipping...
[12:09:53] <jepler> GEOMETRY
[12:09:54] <jepler> errr
[12:09:58] <jepler> GEOMETRY = AXYZ
[12:10:05] <jepler> and gives a display very similar to the one in your screenshot
[12:10:38] <IchGuckLive> ok
[12:10:47] <IchGuckLive> so master has spoken i wil try
[12:28:05] <IchGuckLive> jepler: i got it B)
[12:35:08] <IchGuckLive> jepler: works in Sim mode also i wil test this why it is not showing on a real mashine
[12:42:35] <IchGuckLive> jepler: if there hase been a simulated xyza as i now have one i coud save me the hole day
[12:43:57] <IchGuckLive> i started by 9axis sim and this showes all flat
[12:45:38] <IchGuckLive> so GEOMETRY = AXYZ is the solution
[12:57:46] <IchGuckLive> Thanks all
[12:58:02] <IchGuckLive> it is simply a matter of not knowing all
[13:06:36] <jthornton> Hot Damn, we have errors on the status bar now! http://imagebin.org/240342
[13:27:54] <skunkworks> jthornton: you're having too much fun :)
[13:29:28] <JT-Shop> yea, time for a nap now
[13:32:53] <Jymmm> HAPPY FIRST DAY IN HELL DAY!!!
[13:33:44] <skunkworks> heh - wait - the end didn't happen? go figure...
[13:34:06] <Jymmm> skunkworks: Are you SURE about that???
[13:35:47] <Tom_itx> is this really heaven?
[13:36:06] <Tom_itx> mm wonder if i still owe bills
[13:36:17] <Jymmm> You are IN The Matrix
[14:29:39] <r00t4rd3d> Another of my doings - http://i.imgur.com/OMmW0.jpg
[14:42:14] <andypugh> r00t4rd3d: You could branch out: http://www.ebay.co.uk/itm/RARE-HUGE-Japanese-PUZZLE-BOX-7-Sun-72-1-Move-Step-Ichimatsu-Secret-Trick-/110991224207?pt=LH_DefaultDomain_0&hash=item19d797ad8f
[16:26:43] <DJ9DJ> gn8
[16:44:55] <tjb1-mobile> Hello
[17:22:14] <joe9> hello, I believe there is some way to install linuxcnc just for checking how the gcode files look.
[17:22:18] <joe9> without the rtai api.
[17:22:22] <jdh> sim mode
[17:22:31] <joe9> yes, simulation mode.
[17:22:42] <joe9> jdh: thanks, that should help me.
[17:22:51] <joe9> jdh: let me google up on how to do that.
[17:23:23] <cradek> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?LinuxCNC_Pure_Simulator
[17:23:48] <joe9> cradek: thanks, got it.
[17:23:48] <cradek> it'd be better to add the repository to your sources.list than to use wget/dpkg -i like these instruction say, but either way, you'll get a working simulator.
[17:38:49] <joe9> how do I run linuxcnc in simulator mode: http://codepad.org/CR7HzeUx
[17:40:19] <cradek> try the sim/axis config
[17:40:37] <joe9> ok, thanks.
[17:40:42] <cradek> your config loads hardware drivers (in particular, parport stuff), of which there are none in simulator mode
[17:41:11] <joe9> cradek: that worked like a charm.
[17:41:13] <joe9> thanks.
[17:43:30] <cradek> it can be useful to make a sim configuration that has the same dimensions and velocity and acceleration settings as your actual machine
[17:49:21] <andypugh> pcw_home: Out of interest, can you lower the output voltage of a resolver simply by putting a resistor in series with the primary coil?
[17:50:55] <joe9> cradek, ok. thanks.
[17:51:39] <joe9> btw, is there any way to change the linuxcnc open menu to show the *.ngc files, by default. instead of having to change it in the dropdown?
[17:52:16] <andypugh> PROGRAM_PREFIX
[17:52:56] <joe9> andypugh: thanks.
[17:54:07] <andypugh> http://www.linuxcnc.org/docs/html/config/ini_config.html#_display_section_a_id_sub_display_section_a
[17:54:15] <andypugh> I _think_ that does it.
[17:55:14] <frysteev> waffles
[18:01:36] <joe9> program_prefix is the directory location of the files.
[18:01:43] <joe9> I am looking for the file extension filter.
[18:06:17] <andypugh> Ah.
[18:06:51] <andypugh> I thought that was already default behaviour. But my g-code folder only contains .ngc anyway
[18:44:16] <Jymmm> Does anyone have any 2-56 countersunk head screws by chance?
[18:45:11] <Jymmm> 2-56 x 0.25" long would work
[18:48:00] <andypugh> I suspect that very many people have.
[18:57:21] <Tom_itx> Jymmm i may
[18:57:31] <Tom_itx> sure i have 4-40
[18:58:53] <Tom_itx> nope just 4-40
[18:59:03] <andypugh> <does not understand US screw naming> So, how does one work out how big a 2-56 is?
[18:59:17] <Tom_itx> #2
[18:59:28] <andypugh> Two pounds?
[18:59:40] <andypugh> That sounds like quite a big one.
[18:59:47] <Tom_itx> no
[19:00:02] <Tom_itx> starts at #0 and goes to #14 before fractions
[19:00:09] <andypugh> Because....
[19:00:37] <Tom_itx> actually fractional sizes intermesh with those
[19:00:45] <Tom_itx> starting at 1/16" i think
[19:01:03] <Tom_itx> 0-80
[19:01:09] <andypugh> So why not call them by their actual size?
[19:01:09] <Tom_itx> 80 tpi
[19:01:21] <Tom_itx> that is their size
[19:01:44] <andypugh> OK, so why not name them by their dimensions?
[19:02:11] <Tom_itx> somebody felt the need to have screw sizes between fractional sizes i guess
[19:02:22] <andypugh> Use decimals?
[19:02:27] <Tom_itx> just like our number, letter and fractional size drills
[19:03:25] <andypugh> For example, the Whitworth Instrument thread sizes were the diameter in thousandths of an inch. And 10 WI is really rather teeny.
[19:03:57] <Tom_itx> playing with my new white/blue lcds. i kinda like that color
[19:07:30] <pcw_home> andypugh: yes you can reduce the output that way
[19:08:22] <andypugh> I will bear it in mind. Need to get the scope on it. Tamagawa data sheets say 0.5 ratio, but I am seeing 1:1
[19:08:26] <Tom_itx> i have a 1/4" whitworth wrench and it's no where near 1/4"
[19:09:37] <cradek> andypugh: you don't work it out, you have a feel for the size from experience, and if you need numbers, you have to look at a table.
[19:10:11] <cradek> 2-56 is maybe somewhere around pencil lead size
[19:11:08] <cradek> also, we all have a poster-sized chart on the wall at our shops
[19:11:23] <andypugh> Tom_itx: 1/4" Whitworth spanners are for 1/4" Whitworth bolts.
[19:12:20] <andypugh> I need to add some more to my thread table. It actually lacks the small metric sizes: http://www.bodgesoc.org/thread_dia_pitch.html
[19:13:07] <cradek> andypugh: starrett has had nice posters available free for the asking, I think since day 1
[19:14:30] <Tom_itx> andypugh, yep that's what i got it for :)
[19:14:38] <Tom_itx> some limey car from way back
[19:15:03] <Tom_itx> MG or Triumph probably
[19:15:55] <andypugh> The idea of my table is that they are all on the same list, so it's good for identifying things, and working out what will _nearly_ fit, and what can fit inside what to make an insert, that sort of thing. For example I made a self-centering vice by spotting two threads with the same pitch, but in which the smaller would slip through the larger for assembly.
[19:16:27] <cradek> this is the poster in my shop, and I don't know why you'd buy it on ebay since starrett gives them for free: http://www.ebay.com/itm/230896470827
[19:17:01] <Tom_itx> yeah i've got drill/ thread posters all over
[19:17:11] <andypugh> Tom_itx: I work on a 1916 vehicle. Some time during the War they swapped all the Whitworth head sizes to the BSF head sizes (next size down). Which rather complicates spanner selection.
[19:17:44] <Tom_itx> i honestly don't remember what it was for but i would bet one of those two
[19:18:10] <Tom_itx> and likely positive GND and 6v system maybe
[19:19:10] <Tom_itx> those pocket ones are nice too
[19:19:44] <andypugh> I have a Zeus table.
[19:20:19] <andypugh> http://www.ebay.co.uk/itm/Zeus-Precision-Engineers-Metric-Data-Book-Charts-Reference-Tables-Drill-Tap-Size-/190580021532?pt=UK_BOI_Metalworking_Milling_Welding_Metalworking_Supplies_ET&hash=item2c5f74591c
[19:20:53] <andypugh> But it's largely irrelevant as only use metric unless I have a good reason not to.
[19:24:14] <cradek> andypugh: here, metric fasteners are MUCH more expensive. like 5-10x. metric tools are too, sometimes. there's plenty of reason to use inch stuff even if you're neutral otherwise.
[19:24:56] <andypugh> I found that in SF shopping for stuff to fix the boat.
[19:27:10] <Jymmm> Tom_itx: Thanks for looking
[19:28:31] <andypugh> I am rather a fan of Whitworth. There is a reason that Joe Whitworth chose 55 degrees for the thread angle, and rounding it up to 60 degrees actually helps no-one as it doesn't actually make it any easier to make the thread because the angle is easy to draw with compases.
[19:28:32] <Jymmm> andypugh: Certain portion of my laser are pre-threaded for accesories. These just happen to be one of them.
[19:29:17] <Jymmm> I'm making my own air-assist nozzle, plumbing, etc
[19:29:44] <L84Supper> if i ever get the chance I'm going to go back in time and fix lots of this stuff
[19:31:06] <andypugh> I have dismantled Whitworth threads that have spent 50 years in a field and were so rusted that they were two spanner sizes down, and they came apart cleanly. I have tried to dismantle 10 year old UNF fasteners on a Mini and they have utterly siezed and had to be cut off.
[19:31:39] <andypugh> L84Supper: http://xkcd.com/927/
[19:32:22] <Jymmm> andypugh: what does that have to do with thread size?
[19:33:49] <andypugh> I think it is related to thread angle and pitch to diameter ratio. I am not sure _how_ it is related. But I don't think 55 degrees was a random number
[19:34:02] <Jymmm> ah, ok.
[19:34:06] <AR_> it is linearly proportional
[19:51:39] <IAmWill> does anyone know of a better solution to pycam? I really enjoy it, however, there seems to be a HUGE memory leak or something, because after about 2 minutes of use, it starts to slow my computer and eventually freezes it.
[19:52:12] <IAmWill> doing 2D with it is simple, but when you start getting 3D models that have a little more detail and need 2 or 3 passes, it cant handle it
[22:12:47] <RoyOnWheels> anyone in Oklahoma, Portland Or, Seattle?
[22:18:59] <jdh> not me, thankfully.
[22:31:31] <cradek> why?
[22:33:06] <jdh> because I'd be a long way from home!
[22:53:10] <alpha1125> heh
[23:36:00] <kwallace> Hello. My HNC lathe has home and index sensors so I usually use AXIS' home button to set the machine's home. For to moment I'm using a stepper UI which has no homing button. Is there another way to invoke homing? Also another way to get off the soft limits?
[23:37:34] <cradek> nope. you'd have to run a second ui.
[23:38:24] <cradek> also, stepper machines have homing and limits too, so the distinction you're making is weird to me.
[23:39:17] <cradek> halui is the most common "second" ui people run, but it's possible with any of them.
[23:39:42] <kwallace> I was thinking of using Glade to add the buttons I needed to the UI I'm testing.
[23:41:02] <kwallace> I mentioned the stepper bit because that's the only thing that came to mind as to why there is no homing or limit override.
[23:41:28] <cradek> just sounds unfinished...
[23:41:42] <cradek> "test complete, can't home"
[23:42:40] <cradek> hehe "expected behavior: I can home. actual behavior: ..."
[23:43:03] <kwallace> But the real lathe is being used. I must be missing something.
[23:44:12] <cradek> maybe they don't have switches on it yet.
[23:45:11] <cradek> you need a really repeatable X homing on a serious lathe. I wonder how they will do that without index.
[23:48:21] <kwallace> I haven't tried it yet but I was thinking of mounting a flag on my stepper Shizuoka screws which steps a little under .5 degrees at a time.
[23:50:36] <cradek> worth a try... if you can detect one step that's the best you can hope for.
[23:54:39] <kwallace> I'm half stepping at the moment, giving me .0005" per half step. Playing with the G540 is making lust for a multi-step driver but if I change drivers I'll go with servos. (notice no 's)
[23:55:23] <kwallace> The Tormach uses three phase steppers which I'd like to play with too.
[23:55:44] <cradek> .0005 radius is kind of a lot, isn't it
[23:56:03] <cradek> geckos are nice, it's true
[23:56:24] <cradek> 3 phase! is that a common thing?
[23:57:03] <cradek> like bipolar but 6 wires for 3 windings?
[23:57:38] <kwallace> .0005" per half step of screw rotation. I would put the flag out as far as I can.
[23:57:55] <kwallace> Yes 6 wire.
[23:58:18] <AR_> 3 windings
[23:58:22] <AR_> wire on each end
[23:58:25] <AR_> 6 wires
[23:58:29] <AR_> pretty obvious
[23:58:33] <cradek> cool. I bet that works a lot better than traditional
[23:59:37] <cradek> AR_: many steppers have center tapped windings, sometimes separate, sometimes tied together.