#emc | Logs for 2011-08-27

[00:00:54] <automata> andypugh: USB1.0 is nowhere close to 1ms... with USB 2.0 Full speed device.. I could do a best time of 4.0 ms
[00:01:05] <automata> This was on Bulk transfer....
[00:02:05] <automata> I have written a CNC controller on a USB board with the servo controllers + USB arbitrator on the Board and the Calculation on a PC
[00:02:47] <automata> and I did a lot of research for this project and tried umpteen different USB devices with many drivers... (including libusb)
[00:02:58] <automata> But could not break the 4 ms barrier...
[00:03:12] <automata> Hi speed was also simiar...
[00:03:30] <andypugh> automata: Did you find https://www.rtai.org/RTAICONTRIB/
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[00:04:14] <YK_> Understood. As it is for now, I'll just take it as, emc2 teaching must be developed, though gcode movement is functional. Alright, thanks for all the help- I really appreciate it, and will be back with more inquiry sometime later. Good night everyone~
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[00:04:40] <automata> So RTAI has a USB port!!!
[00:04:46] <andypugh> If you want a project, first working out what rtaiusb is _for_ would be good, then making it compile with a new kernel, then making it work could be enormously valuable
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[00:05:11] <automata> Does anyone have data on RTAI + USB latency?
[00:05:32] <andypugh> I don't think anyone has ever made that code work
[00:06:18] <andypugh> I tried to make it compile, and got close, but could never quite figure out what it was meant to do.
[00:07:08] <automata> I have tried with many different things (including using QNX) to get USB to behave .. But to no avail... I have about given up on USB for anything more sensitive than 50ms
[00:07:34] <andypugh> You sound like just the chap to have a look at that code.
[00:08:04] <automata> I can try... I have already downloaded it... will give it a look in th emorning...
[00:08:12] <automata> oh Wait ... it is morning!!!
[00:08:28] <automata> damn...if 5:30 am... and I am still at work!!!
[00:08:46] <andypugh> It's main problem is that it uses kernel macros that are superceded, I got it to almost compile by googling the macro errors, and updating blindly,
[00:09:39] <andypugh> automata: If I didn't know you were in India before, I would now. There are not many fractional timezones,
[00:10:24] <automata> I thnik about 20 countries have fractional timezones...
[00:11:07] <andypugh> Really?
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[00:11:31] <automata> Of the total 169 that are invited to the Olympics...
[00:12:38] <automata> Well I gtg... see you tomorrow...
[00:12:39] <andypugh> It does seem a bit odd that a country as wide as India would, as naturally it should probably have two, so a half-hour approximation is no better than a full-hour one
[00:13:01] <andypugh> Is is tomorrow now for me too.
[00:13:40] <andypugh> 0013 GMT I think (0113 local)
[00:14:03] <automata> India actually needs 1.5 timezones... but to make it uniform only one timezone was proposed and that is about at the horizontal center of the country..
[00:14:38] <andypugh> it would be so much simpler if everyone used GMT all the time, and just did things at a convenient time.
[00:15:22] <jdhNC> exactly. Except instead of GMT, just all use EDT
[00:15:22] <automata> Well people were doing thing at a convenient time even before GMT or I'd rather say TIME itself... ha
[00:16:25] <andypugh> "Oh, so it is dangerous for kids to go home from school at 4pm in the dark?" Then send them home at 3pm, rather than lie about the time of day on a national level.
[00:16:44] <automata> I still cannot get the "D" in EDT... "I used to recite for all of September "In fall you fall back" and in all of April " In spring you spring forward"... 10 years living in EDT i still could not get the hang of it...
[00:17:11] <automata> So I finally gave up and moved back to India.!! hahaha
[00:18:08] <andypugh> automata: Exactly. If sunrise in your town happens to happen, on average, at 0230, so what?
[00:19:17] <andypugh> Go to work at 0400, go to bed at 1600.
[00:19:27] <automata> I guess i am getting dizzy from lack of sleep... Better get home grab a zouple hrs of ZZZ's before the kids wake up and create a rucus...
[00:19:37] <andypugh> They are only arbitrary numbrs
[00:19:50] <automata> Well your analogy is the same as: the coordinate frames in EMC...
[00:20:13] <automata> Why do we need so many??? G53, g54,g55,56,57,58,59
[00:20:21] <andypugh> Aye, regardless of the numbers, you should be in bed, otherwise the birds will keep you awake
[00:20:32] <automata> and if that was not enough g59.1,.2.,.3
[00:21:15] <automata> and to top that off we have g90,91,92, 92.2,92.2,92.3!!!
[00:21:28] <automata> I thnk that should cover all the frames right!!!
[00:21:39] <andypugh> The idea is to run the same code in different fixtures. I doubt they get used very much. And G92 really could handle all of it.
[00:22:17] <automata> Well the same idea is to run the human brain code in different geographical locations!!!
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[00:22:42] <automata> After that comment... I really need to get some sleep!!!
[00:24:19] <automata> G92 (with 92.1,.2 and .3) really does handle all the issues... And I have over 5,000 machines I made in the field that can prove this to be true!!!
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[00:52:49] <Jymmm> AutoCAD to G-Code 3D http://www.lindsayengraving.com/other_interests/gcode/index.html
[00:53:38] <Jymmm> cradek_: ^^^^^
[00:53:48] <Tom_L> google ncpolaris
[00:54:29] <Tom_L> http://www.ncpolaris.de/html/ncp_english.html
[00:55:28] <Jymmm> Tom_L: open source?
[00:55:38] <Tom_L> oh hell no
[00:55:38] <Tom_L> $$$
[00:55:51] <Jymmm> Tom_L: the link I gave is
[01:00:13] <mikegg> Tom: did you figure out what to do with the Xilinx ISE yet?
[01:01:10] <mikegg> I haven't figured out what files I should open with it
[01:01:26] <Tom_L> yes but i haven't done it yet
[01:01:57] <Tom_L> i've used 4.2 several years back
[01:02:55] <Jymmm> What's the pink stuff? Bondo? http://www.lindsayengraving.com/tour/Cincinnati%20Mill%20restoring/index.html
[01:17:28] <andypugh> Looks like a sturdy machine. The pink is probably knifing putty.
[01:17:42] <Jymmm> what s that?
[01:18:23] <Tom_L> Jymmm so where's the pics of your honeycomb table?
[01:18:42] <Jymmm> in the camera
[01:18:54] <andypugh> It's like very thick paint applied with a knife. A lot like bondo, but not as hard, and no need to mix
[01:18:55] <Tom_L> waiting to be developed?
[01:18:57] <Tom_L> :)
[01:19:12] <Jymmm> Tom_L: exactly =)
[01:19:16] <Jymmm> andypugh: ah, thanks
[01:19:41] <Jymmm> Tom_L: I'm working how to create the cross supports
[01:19:42] <Tom_L> i had a tube of that for auto body work only it was laquer
[01:22:49] <Jymmm> Tom_L: only 1/8" to go!
[01:23:23] <andypugh> Jymmm: An alternative name is "stopper" though all the web searches for "cellulose stopper" come up with UK sites, so you might have your own name for it.
[01:24:09] <Jymmm> andypugh: ah, ok. I was more curious than anything else. I thought it might have been a protective film like they use to ship from china
[01:24:33] <Tom_L> no that would be cosmolene
[01:24:43] <Jymmm> yeah, hat's it
[01:24:46] <Jymmm> t
[01:25:05] <Tom_L> of various consistencies
[01:38:27] <andypugh> night all
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[02:12:27] <Tom_itx> pcw_home
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[02:12:46] <Tom_L> http://www.keyelco.com/pdfs/m55-comp-bkts.pdf
[02:12:57] <Tom_L> short card hardware
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[08:22:21] <automata> Is there a way to set a zero offset? i.e. change the G53 coordinate system without Actually homing the machine?
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[08:24:05] <IchGuckLive> jdhNC: still standing ?
[08:26:45] <IchGuckLive> live frpm NC http://www.ustream.tv/channel/live-severe-weather-webcam
[08:26:53] <IchGuckLive> from
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[08:30:23] <IchGuckLive> Downcradet to cat ¹
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[08:54:52] <automata> IS there a way to set the current location of the tool to Zero without Homing or without using G92 ??
[08:56:09] <IchGuckLive> to mashine Zero ?
[08:57:05] <IchGuckLive> you got the parameters tht stores the part zero and the mashine zero
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[09:09:17] <IchGuckLive> jdhNC: still standing ?
[09:09:30] <IchGuckLive> cat1 now at your ashop
[09:09:57] <IchGuckLive> http://www.ustream.tv/channel/live-severe-weather-webcam live 25mil north
[09:11:46] <automata> Yes Machine Zero...
[09:12:09] <automata> Can those parameters be written while in Manual Mode?
[09:12:37] <IchGuckLive> written to?
[09:14:34] <automata> I mean: Start EMC2 .. jog the machine to some location (say 5,5,5) in manual mode. Now set the parameters so that Current location is (0,0,0)
[09:15:29] <IchGuckLive> just set your G54 location
[09:16:04] <automata> Setting the G54 will be an MDI command.
[09:16:40] <automata> I donot want to switch to MDI mode before issuing this offset.
[09:17:17] <automata> Also, G54 command sets the origin of the G54 coordinate system. I want to set the origin of the G53 coordinate system...
[09:17:19] <IchGuckLive> http://www.linuxcnc.org/docview/html/common_machining_center.html#sub:Parameters
[09:17:50] <IchGuckLive> G53 is set at the homing parameters
[09:17:59] <automata> I am sure it is possible... Because homing any axis does this exact same thing...
[09:19:44] <automata> If we donot have a home switch connected... Homing any axis just sets the G53 coordinate system origin to current location...
[09:20:28] <IchGuckLive> thats true but i do not realy understand what problem you got
[09:21:07] <automata> If we set the AXIS_0.HOME_SEARCH_VEL in the ini file to 0
[09:21:47] <automata> I am trying to operate the machine to do some simple positioning tasks using only manual mode...
[09:22:02] <automata> This is being done form a remote terminal... through emcrsh
[09:22:23] <automata> I donot want to switch to MDI mode to issue a command...
[09:22:47] <elmo40> dude, there is only one home position to your machine.
[09:23:02] <automata> This machine does not have a regular GUI (axis, tkemc, xemc, mocca etc) running...
[09:23:05] <elmo40> g54 is a work coordinate... that is what you want to edit/modify
[09:23:13] <IchGuckLive> automata: so no homeswitches on your mashine
[09:23:24] <automata> Nope No home switches....
[09:23:56] <automata> Just a couple of rotary axes placed in close proximity... so any position can be defined as home/ zero...
[09:24:23] <IchGuckLive> automata: http://wiki.linuxcnc.org/emcinfo.pl?Homing_And_Limit_Switch
[09:24:27] <automata> More precise 2 orthogonal rotary axes...
[09:24:45] <IchGuckLive> see note 1.2
[09:25:14] <automata> Yes I have set the AXIS_0.HOME_SEARCH_VEL = 0 in my INI file...
[09:26:03] <IchGuckLive> so restart the mashine and then it shout work
[09:26:10] <automata> Now I can move to any location and just send the Home Command and that position will be set to Zero...
[09:26:25] <IchGuckLive> yes
[09:26:43] <automata> The problem is when I want to set the current position to (5,5) or (10,2.2)
[09:26:47] <automata> How can that be done...
[09:26:50] <IchGuckLive> command is nedet per axis
[09:27:09] <automata> Yes one home command per axis...
[09:27:58] <IchGuckLive> you need to set the parameters of the coordinate system to the position the axis is now
[09:28:23] <elmo40> why do you want to always change your home position?
[09:28:38] <elmo40> do you program with g54?
[09:29:02] <automata> I donot use Gcode or MDI commands with this machine....
[09:29:28] <IchGuckLive> and no gui
[09:29:31] <automata> I send a jog Abs NML command to the interpreter...
[09:29:37] <automata> yes NO GUI
[09:29:56] <automata> just a remote shell... on a remote machine...
[09:30:04] <automata> logging in over telnet...
[09:30:23] <automata> i.e., sending commands over telnet...
[09:30:26] <IchGuckLive> so what is the interpreter like
[09:30:58] <automata> The interpreter is emcrsh.cc. I modified it a little to include the jogAbs command.
[09:31:31] <automata> emcrsh has a specific command set That can be sent over a socket connection...
[09:32:08] <automata> I modified that to use multiple sockets with one socket accepting new commands and one socket providing feedback
[09:33:11] <automata> emcrsh uses a standard module shcom.cc which is used with xemc and keystick GUI's...
[09:33:38] <IchGuckLive> so this uses the same parameters
[09:34:12] <IchGuckLive> is the interpreter running on a pc or Mµ
[09:34:23] <elmo40> what is the purpose of thismachine?
[09:34:39] <automata> Yes.. I can have an axis GUI running on the machine simultaneously.. However, axis just hogs all the error messages... so my error update goes empty...
[09:35:04] <automata> and you should not do a NML peek on the error Queue (that is what I read somewhere)...
[09:35:55] <automata> This machine is used to make marks on the periphery of bangles (circular disks)...
[09:36:01] <IchGuckLive> im off
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[09:39:57] <elmo40> any photos?
[09:41:27] <automata> Still being made...
[09:41:32] <automata> No photos yet...
[09:42:04] <automata> Also I am only making the controller... The machine hardware is being made by my friend...
[09:46:10] <automata> Imagine two motors placed orthogonal to each other such that Motor 1 is rotating in the YZ plane with center coordinates(0,0,0) and motor 2 is in the XZ plane with coordinates(0,0,2) The dia of each circle is 1. So the two motors are just touching each other...
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[11:02:30] <IchGuckLive> hi all
[11:02:41] <IchGuckLive> jdhNC: still standing ?
[11:03:35] <IchGuckLive> http://www.ustream.tv/channel/live-severe-weather-webcam live from near your store
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[12:24:30] <jthornton> skunkworks: do you have a link to the tool change part of the config for the K&T?
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[12:49:18] <Tom_itx> pcw_home, looks like mouser has them but the cost is too high http://www.mouser.com/ProductDetail/Keystone-Electronics/9231/?qs=sGAEpiMZZMvIGAkyPb0MlKr0PJ2OY4F%2f
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[13:41:07] * JT-Shop wonders what SFM to use to drill a leaf spring with a HSS bit
[13:42:13] <JT-Shop> I think I'll try 50 SFM
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[14:07:47] * Tom_itx wonders how far JT-Shop will get with that
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[14:30:22] <JT-Shop> seemed to work ok
[14:44:21] <Tom_itx> garden is officially all done for the year
[14:47:07] <jthornton> I've been spraying my garden with Eraser all summer
[14:47:40] <Tom_itx> it was too hot here and i got absolutely nothing from it but a few potatoes
[14:47:55] <archivist> weedkiller++
[14:48:58] <jthornton> I'm trying to kill back the grass that takes over my garden each year
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[16:28:38] <Jymmm> Decisions, decisions... What to do, I'm so confused... do I buy the drill/battery/charger for $15 http://www.harborfreight.com/merchandising-promotions/merchandising/gigantic-tent-sale-august-2011/18-volt-cordless-38-drilldriver-with-keyless-chuck-68239.html -OR- a spare battery alone for $13 http://www.harborfreight.com/18-volt-nicd-replacement-battery-68413.html
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[16:30:53] <Jymmm> An extra cordless drill and charge for $1/ea seems kinda expensive.
[16:31:19] <Jymmm> Double Fisted Driller???
[16:32:01] <awallin> just get a makita for $300 instead :)
[16:32:05] <awallin> or ryobi or whatever
[16:33:29] <Jymmm> I wish I didn't already have a cordless, you just can't beat the price, even if it breaks or gets lost
[16:33:58] <Jymmm> and they have a corner sander and jigsaw that takes the same battery
[16:36:08] <Jymmm> http://www.harborfreight.com/merchandising-promotions/merchandising/gigantic-tent-sale-august-2011/18-volt-cordless-jig-saw-67044.html
[16:37:03] <awallin> $9 for that is just crazy. any piece of wood plank or plywood you'll cut with it will be worth more than $9
[16:37:46] <Jymmm> The reviews seem positive for the most part. But for $9 eh
[16:39:43] <Jymmm> For when you measure once and cut twice... a METAL STRETCHER!!! http://www.harborfreight.com/merchandising-promotions/merchandising/gigantic-tent-sale-august-2011/stand-for-8-inch-metal-shrinker-stretcher-66235.html
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[17:00:58] <IchGuckLive> hi all
[17:01:06] <IchGuckLive> jdhNC: how wars it
[17:02:25] <IchGuckLive> http://www.ustream.tv/channel/c5n
[17:09:21] <IchGuckLive> jdhNC: still standing ß
[17:11:09] <A2Sheds> http://www.youtube.com/watch?v=2vZraXnre64 Nanmadol was up to 190mph yesterday
[17:11:46] <IchGuckLive> the cyclones are more powerfull cause hoter water
[17:12:14] <A2Sheds> yeah, heading right for Taiwan today
[17:13:35] <A2Sheds> scattered sunshine over Germany?
[17:13:57] <Loetmichel> am i right that the power souce of tornados is the water vapor?
[17:14:03] <IchGuckLive> no rain for the hole da
[17:14:25] <IchGuckLive> Loetmichel: yes
[17:14:39] <IchGuckLive> http://interactive.foxnews.com/livestream/live.html
[17:14:52] <Loetmichel> so what if one would get big oil tankers with pumps aboard which cah pump deep sea water to the surface and thus coooing the water surface UNTEr the hurricane?
[17:15:04] <Loetmichel> wouldnt that killt the storm?
[17:15:13] <A2Sheds> you'd need some big tankers
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[17:15:32] <IchGuckLive> the water inside is the same temp as outside
[17:15:45] <Loetmichel> A2Sheds: scattered sunshine hits it on the point : http://www.cyrom.org/palbum/main.php?g2_itemId=12277
[17:15:54] <IchGuckLive> and the spred shoud extend europ land mark
[17:15:57] <Loetmichel> (made half an hour ago or so)
[17:16:24] <A2Sheds> nice rainbow
[17:16:27] <Loetmichel> IchGuckLive: no, not tankers for carriing water
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[17:17:03] <Loetmichel> just for REAL big pumps to pum deep sea water ( about 4c) to the surface and cool the surface
[17:17:04] <IchGuckLive> the wind will kill all ship traffic and the wave hight
[17:17:31] <Loetmichel> thats why one should use BIG ships
[17:17:45] <Loetmichel> so they can withstand extreme waves
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[18:43:54] <ve7it> Jymmm, cq cq
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[18:48:02] <A2Sheds> cq cq cq dx?
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[18:56:44] <ve7it> A2Sheds, hi... Canada here
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[19:57:22] <andypugh> Yo! KimK You there?
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[20:35:06] <KimK> andypugh: I am now. I'll need to review the bit file I asked for, and then shut off to connect the 7i49 and whatever else it was. I think I asked for a "typical" installation, maybe 7i49, then 7i33 or 7i48?, then 7i37 or unspecified DCIO? Let me look, brb.
[20:35:54] <andypugh> I am half way to putting in the "Infrastructure" of the resolver driver.
[20:36:58] <KimK> Excellent, I appreciate your help.
[20:42:15] <jdhNC> Ich: wind and rain, mostly gone now.
[21:11:06] <Tom_itx> we had a couple smack you in the eye rain drops and now it's all dry
[21:12:31] <Tom_itx> on the mesa files, do i need to create a project to edit a bit file and is the bit file the only thing i need to load to modify it?
[21:13:14] <Tom_itx> I just loaded the 9.2 webpack files and was gonna play with it a bit
[21:13:34] <Tom_itx> last time i did any xilinx stuff was around ver 4.2 or so
[21:13:36] <Tom_itx> :)
[21:13:41] <Tom_itx> i'm rusty
[21:18:28] <andypugh> I am not sure how many folk have ever built a bitfile. Jepler and isssy both have, I think
[21:18:50] <Jymmm> 11001110010110
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[21:39:36] <Tom_itx> oh i need ghdl to build pin files
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[21:43:31] <Tom_L> http://ghdl.free.fr/
[21:43:34] <Tom_L> is that the critter?
[21:48:56] <andypugh> pcw_home: The Resolver module declares only one instance of itself. Is that correct?
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[22:03:48] <Jymmm> Got a 4ft yard stick for $3
[22:04:30] <Tom_itx> stretch it and maybe you'lll end up with a tape measure
[22:04:44] <Jymmm> woohoo!
[22:05:07] <nicko> would it cost more or less after stretching ?
[22:05:21] <Jymmm> http://www.harborfreight.com/48-aluminum-ruler-67808.html
[22:05:28] <Tom_itx> the purchase has been made
[22:05:43] <Tom_itx> any mods to the product would void the warranty though
[22:05:47] <andypugh> A 4ft yard stick is broken.
[22:05:54] <Jymmm> lol
[22:06:02] <Jymmm> I was wating for someon to catch that
[22:06:15] <andypugh> Even Metric Me knows that
[22:07:14] <Jymmm> strange, if you SEARCH for "Aluminum Ruler" nothing shows up.
[22:07:18] <nicko> has it got the silk screened numbers on it or are have they been um, er, 'bashed' in like on most steel rules ?
[22:07:27] <Tom_L> it's hard to measure sheetrock with a 3' yard stick
[22:07:34] <Tom_L> ask JT-Shop
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[22:07:49] <Jymmm> silk screened, but it's 1/8" thick and 2" wide
[22:07:51] <Tom_L> i bet he has a 4' yardstick
[22:08:20] <andypugh> Jymmm: That's because it ought to be spelt "aluminium"
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[22:08:23] <Jymmm> Tom_L: That's EXACTLY why I picked it up
[22:08:34] <nicko> Dont clean it with any solvents! that stuff comes off immediately
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[22:08:55] <Jymmm> andypugh: Yeah, go write some html already
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[22:09:18] * Tom_L is still waiting to see what a honeycomb table looks like
[22:09:28] <Jymmm> nicko: I mostly got it for a straight edge than a ruler
[22:09:41] <andypugh> I have managed to sneak some "analogue_in" pins into one of the drivers :-)
[22:09:52] <nicko> I got myself a 1m 'aluminium' ruler that was very cheap too - now its a length of aluminium
[22:10:13] <Jymmm> Tom_L: me too, you feel like working on the remaining issues?
[22:10:57] <Tom_itx> naw i think you can handle it just fine
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[22:11:59] <Jymmm> Tom_itx: Trying to, just working withing the tools that I have making think the design harder is all
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[22:12:03] <KimK> andypugh: Wouldn't it be better if the analogue_in pins were made out of aluminium?
[22:12:20] <JT-Shop> andypugh: 0-5v?
[22:12:57] <Tom_itx> 5v tolerable
[22:13:24] <Jymmm> Didn't help any that my better half dislocated her shoulder 2h ago, and JUST got it 90% back in place a few moments ago
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[22:13:58] <nicko> %90 ???
[22:14:02] <andypugh> JT-Shop: 0-3.3V I think, actually. They appear on the 7i64.
[22:14:09] <nicko> I've never experienced a dislocation
[22:14:28] <Jymmm> nicko: Yeah, not seated all the way in the socket like it should. You NEVER EVER want to either.
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[22:14:38] <KimK> Jymmm: Ooh, I'll bet that smarts, wish her a get well soon for us.
[22:14:39] <andypugh> I can imagine from here just how politely grateful she was
[22:14:41] <nicko> but playing around with rod ends makes me cringe
[22:14:48] <Jymmm> KimK: Thanks
[22:15:09] <nicko> Why wouldn't you want it seated fully ??
[22:15:13] <andypugh> I dislocated a knee. It's not been right since.
[22:15:37] <nicko> you dislocated your right knee and put it back in the left ?!?
[22:15:41] <Jymmm> andypugh: Oh yeah, she was making the sailor's blush there for a while.
[22:16:34] <Jymmm> nicko: You DO want it seated fully, it just doens't want to seat fully right now. ligaments and all that not going where they should, some are torn.
[22:17:40] <andypugh> I think he was saying that you don't want to dislocate, not that you don't want to 100% relocate. I had to reassemble the thread order, too.
[22:19:54] <KimK> andypugh: Alright, I must shut down to connect and check jumpering on all this stuff. Back in 15-30 minutes, maybe?
[22:20:13] <andypugh> You want the patch first?
[22:20:23] <KimK> Patch?
[22:20:32] * JT-Shop needs to come up with a simple pawl and ratchet wheel
[22:20:43] <JT-Shop> archivist: got any hints?
[22:20:50] <andypugh> I have almost finished the 7i49 stuff, it just needs to be made to work.
[22:21:08] <andypugh> So, 90% of the code, 10% of the work done.
[22:21:46] <KimK> Take your time, I'll install all the related (and unrelated) hardware and be right back.
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[22:48:18] <GermainAdrian> hi all
[22:48:23] <GermainAdrian> how do you bend safety glasses to size?
[22:48:41] <GermainAdrian> I've got a couple that are too tight. boiling water isnt hot enough and open flame melts it before its bendable
[22:48:44] <GermainAdrian> oil bath?
[22:49:21] <andypugh> Hot air gun?
[22:49:39] <andypugh> Microwave might work
[22:49:41] <JT-Shop> plasma
[22:49:59] <andypugh> Might be easier to machine down the skulls
[22:50:17] <GermainAdrian> microwave eh
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[22:52:08] <GermainAdrian> what are the frames made of?
[22:52:17] <GermainAdrian> stamped "crews taiwan"
[22:52:39] <andypugh> Probably polycarbonate
[22:52:46] <GermainAdrian> well, the lenses are polycarbonate
[22:52:52] <GermainAdrian> but frames are something else, more rubbery
[22:53:05] <GermainAdrian> one pair i was able to bend in boiling water
[22:53:58] <andypugh> It is unlikely that we, who have never seen the items in question, will have a better idea what they are made of than you, who have.
[22:54:10] <tom3p> does a higher rotor moment of inertia indicate slower acceleration? (trying to match an out of production PAC-SCI motor )
[22:56:16] <GermainAdrian> andypugh: im pretty sure they are all the same
[22:56:20] <GermainAdrian> in every part of the world
[22:56:28] <GermainAdrian> i have 10 pairs, and they are all the same, except for one
[22:56:43] <GermainAdrian> even texture feels the same
[22:57:07] <andypugh> tom3p: Yes
[22:58:12] <GermainAdrian> http://images1.opticsplanet.com/640-640/opplanet-pyramex-venture-ii-safety-glasses-amber-lens-black-frame-sb1830s.jpg
[22:58:58] <andypugh> It ought to say on them what they are made of.
[22:59:04] <tom3p> thx andypugh
[23:00:51] <GermainAdrian> it only has a safety standard
[23:00:56] <GermainAdrian> that applies to the actual lens.
[23:01:10] <GermainAdrian> open flame was able to melt it, so it is thermoplastic, dont know the actual temp.
[23:04:31] <andypugh> If the parts don't say what they are, then I think they would not be able to sell it in Germany.
[23:04:50] <andypugh> Not that that information helps you at all.
[23:05:20] <andypugh> They are probably thermoplastic with a rubbery cover
[23:06:18] <andypugh> I think I would be trying to bend them cold. They are unlikely to snap. It depends how much viscoelastic memory they have.
[23:12:59] <tom3p> in usa i have to have 'zx90' frames in most factories well well google that and find 'crew' glasses http://www.utilitysafeguard.com/Safety/Safety-Glasses/ZX-Plus-ZX930/
[23:13:33] <tom3p> http://www.fullsource.com/pdf_downloads/ZX930.pdf
[23:14:10] <GermainAdrian> so nylon
[23:14:21] <GermainAdrian> thanks
[23:17:25] <tom3p> was there some rule of thumb for steppers... like longer = faster, fatter = more torque ( given mh, ohms, nearly same )?
[23:18:06] <andypugh> That seems likely, yes.
[23:20:26] <andypugh> I think that a longer motor of the same diameter should have more torque and the same speed (though my NEMA23 2-stack v 3-stack experience doesn't really seem to bear that out.
[23:20:35] <tom3p> again :) thx i picked up a dead japax hole drill, nice casting, with nema23 steppers, and found 2 variants of replacement motors ( today is buy steppers day for 2 diff machines :) )
[23:20:52] <andypugh> Going to a larger diameter is free torque, and quite a lot of it, but at the expense of rather lower speed
[23:25:12] <tom3p> and is it true a lower inductance (generally) can be driven faster ? ( i guess the inductor charges faster )
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[23:28:22] <andypugh> Yes, but a lower inductance generally means a lower field.
[23:28:42] <tom3p> erf! ?? lower field?
[23:28:54] <tom3p> what does that mean?
[23:29:07] <Tom_itx> less torque?
[23:29:10] <andypugh> electromagnetic field, so less torque pulling on the magnets
[23:29:22] <Tom_itx> what about the drive voltage?
[23:29:31] <tom3p> ah less overall torque
[23:29:33] <pcw_home> andypugh yes theres just one Resolver mod (can be 4 or 16 total I think) Number of channels/module is 6, which is a readable parameter
[23:29:55] <andypugh> Always 6?
[23:30:01] <tom3p> thx again
[23:31:02] <tom3p> i was looking at a keling kit and just noticed they are in the next town, i hope they'll drop the 40$ shipping and let me pick it up
[23:31:14] <Tom_itx> i'm sure he would
[23:31:22] <Tom_itx> seems like a good guy to deal with
[23:32:28] <pcw_home> No
[23:33:02] <andypugh> So, at some point I need to figure out how to read that as a parameter?
[23:33:10] <tom3p> Tom_itx, i >think< i bought the pac-sci from him, but that must've been 10 years ago
[23:33:26] <pcw_home> Well only six with existing daughtercards...
[23:33:54] <pcw_home> you could punt for now and assume 6
[23:34:00] <Tom_itx> i got my steppers from him a while back
[23:34:28] <andypugh> I should probably assume 6x num_instances then?
[23:34:45] <andypugh> pcw_home: Do you want the patch to fiddle with?
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[23:35:07] <pcw_home> Yes 6x inst
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[23:36:40] <pcw_home> I'll write out the parameter read procedure (similar to sserial but32 bit data) next week
[23:36:42] <pcw_home> And yes I would like the patch to try next week
[23:36:44] <pcw_home> bbl need to walk the dog
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