#linuxcnc | Logs for 2014-08-12

[01:23:54] <anarchos> it's alive :D
[01:23:57] <anarchos> https://www.youtube.com/watch?v=CRIWDZF9skU
[01:50:48] <Jymmm> A waterproof 3"/4" blower than runs from 12/24vdc and outputs 135/235 CFM for under $40 USD: http://westmarine.com/buy/rule-industries--waterproof-in-line-blowers--P012_362_001_002
[01:59:59] <Deejay> moin
[02:01:22] <MC500> I have a rotary encoder on my 4th axis.. it has a make an model but I cant get info on it. it also says "Specs. 10F and 9000 Lines" does that make sence to anyone?
[02:01:41] <MC500> Lines 9000 actually
[02:02:32] <archivist> does it have the connections on the label too?
[02:02:49] <MC500> no
[02:03:18] <MC500> it was hooked up with EMC and working but I lost the drive and config files
[02:04:36] <archivist> 2 or 3 wires to your interface
[02:04:57] <anarchos> https://www.youtube.com/watch?v=CRIWDZF9skU
[02:05:26] <archivist> should be easy enough to work out the config for the encoder
[02:07:32] <MC500> not sure about the wires, maybe 2 as I do have part of the configs
[02:08:29] <MC500> I have it set up as a LINEAR it is the only way I can get it to move, and it has been set up as both LINEAR and ANGULAR in past versions of EMC
[02:08:41] <archivist> 9000 sounds ok for a high resolution encoder
[02:13:09] <MC500> So qirh 9000 lines where do I and how do I put that in my EMC configs.. I am using a stg card so I assume stg.ini
[02:13:39] <archivist> I have no idea what that card is
[02:13:46] <MC500> its an isa card
[02:13:50] <MC500> old
[02:15:15] <archivist> card config would be for connections, the linuxcnc config would hold the scale factor
[02:17:55] <MC500> well there the files as I recal the card is servo to go so stg is the prefix to every file.. so there is stg.ini stg_io.hal stg_motion.hal and core_servo.hal
[02:19:14] <MC500> what are the imput_scale and output_scale config lines for in the stg.ini file?
[02:21:15] <archivist> http://www.linuxcnc.org/docs/2.4/html/drivers_servo_to_go.html
[02:45:19] <MC500> It does apear to be the IMPUT_SCALE in the stg.ini file but what do I put there, if my rotary encoder has 9000 lines do I put 9000 to 1?
[02:54:20] <archivist> a number per distance/angle depends, it is something you calculate depending on other numbers
[02:54:40] <archivist> eg inch/metric etc
[02:54:56] <archivist> and any gearing
[02:58:04] <MC500> while the encoder is bound directly to the axis there should be no ratio so does it sound like 9000 pulses per every 360 degrees?
[02:59:32] <MC500> I also have the encoder working as LINEAR I am thinking I need to persue ANGULAR
[04:50:04] <anonimasu> Hello, Does anyone have a clue or sample hal file for manually moving a torch while in cut?(changing offset or such) as I dont have a auto thc so it needs adjusting
[05:48:24] <skunkworks_> https://groups.yahoo.com/neo/groups/mach1mach2cnc/conversations/messages/145325
[06:14:07] <jthornton> anonimasu, you want to jog the torch up and down while cutting?
[06:17:31] <archivist> something seriously bad on yahoo it screws my firefox to 100% cpu and not responsive
[06:21:14] <syyl_ws> yeah
[06:21:30] <syyl_ws> theres yahoo on yahoo that makes it bad
[06:21:45] <archivist> and mach4 on yahoo :)
[07:31:51] <JLuc69> please, is there a French channel?
[07:32:09] <JLuc69> for linuxcnc :p
[07:33:55] <archivist> dont think so
[07:35:18] <JLuc69> et y a t'il des français dans la salle ?
[07:37:00] <archivist> ask the real question
[07:37:54] * archivist points at google translate
[07:38:27] <JLuc69> and are there any French in the room?
[07:39:00] * jdh tries to think of a suitable frenchman joke
[07:39:35] <JLuc69> ^^
[07:39:38] <archivist> JLuc69, that is the same question :)
[07:40:15] <JLuc69> yes :D
[07:40:16] <archivist> I used google translate, it is better to ask your linuxcnc questions
[07:41:36] <JLuc69> is what linuxcnc manages a card RS232 port?
[07:42:18] <JLuc69> I have a map InterpCNC v1.5
[07:45:05] <JLuc69> http://www.soprolec.com/shop/fr/controleurs-d-axes/9-interpcnc-v15-rs232rs485.html
[07:46:49] <archivist> I dont think that would be easy to use with linuxcnc
[07:47:34] <JLuc69> thank you
[07:47:51] <archivist> linuxcnc is the controller, that is an embedded controller
[07:49:29] <JLuc69> I do not understand anything :p
[07:49:57] <JLuc69> linuxcnc is a soft ?
[07:50:13] <archivist> yes that does the same thing as that card
[07:51:30] <archivist> same/more than
[07:51:36] <JLuc69> map is managed by gaalad which is also a software
[07:53:34] <archivist> manager/gui (axis)->control (linuxcnc) -interface>(various)
[07:56:11] <JLuc69> So I would have my axes controllers connects directly to the parallel-port?
[07:57:59] <JLuc69> linuxcnc replace my card?
[08:01:12] <JLuc69> i have 4 microstep driver connect to my card for 4 motor
[08:01:49] <IchGuckLive> hi all from sunny germany
[08:01:59] <IchGuckLive> anonimasu: still here
[08:02:13] <XXCoder1> hey
[08:02:25] <IchGuckLive> XXCoder1: one day to go in worklive
[08:02:54] <IchGuckLive> JLuc69: hi im on rrthe french boarder near BITCH
[08:03:17] <JLuc69> hi IchGuckLive
[08:03:23] <IchGuckLive> ;-)
[08:04:15] <JLuc69> I lyon
[08:05:29] <IchGuckLive> so you got a modbus interface you want to run in linuxcnc
[08:06:20] <IchGuckLive> its a very expensive item for what it can do
[08:07:32] <IchGuckLive> JLuc69: ce qui est votre cible
[08:08:00] <JLuc69> I do not understand anything :p
[08:08:05] <IchGuckLive> une fraiseuse CNC , tour
[08:08:11] <JLuc69> mill
[08:08:50] <IchGuckLive> 3 , 4 axes
[08:09:09] <IchGuckLive> moteur pas à pas
[08:09:22] <JLuc69> 3 so far
[08:09:27] <JLuc69> oui, pap
[08:09:57] <IchGuckLive> taille de Maschin
[08:10:07] <IchGuckLive> XYZ
[08:10:12] <IchGuckLive> mm
[08:10:19] <JLuc69> 550,380,130
[08:10:32] <JLuc69> en gros
[08:10:59] <JLuc69> http://sitemeca.free.fr/index.php?page=reportages&article=1#macnc
[08:11:09] <IchGuckLive> vis d'entraînement,Transmission à courroie crantée
[08:11:42] <JLuc69> but... tout en français :p
[08:12:04] <IchGuckLive> balle !!!
[08:12:35] <IchGuckLive> Vous avez trop d'argent
[08:13:23] <IchGuckLive> le modèle de l'ordinateur ?
[08:13:26] <JLuc69> non, j'en avais mais j'en ai plus :D
[08:13:39] <JLuc69> un p4
[08:13:44] <IchGuckLive> aucune femme
[08:13:52] <JLuc69> et si :D
[08:14:33] <IchGuckLive> P4 modèle abricant
[08:14:49] <IchGuckLive> Fabricant
[08:14:50] <JLuc69> je sais plus, c'est un vieux :p
[08:15:31] <JLuc69> age : 10 ou 12 ans
[08:15:55] <IchGuckLive> port parallèle DB25
[08:16:02] <JLuc69> oui
[08:16:20] <JLuc69> enfin, je crois :o)
[08:16:56] <IchGuckLive> vous avez besoin de savoir pour sûr
[08:17:21] <JLuc69> c'est sûr à 98%
[08:17:55] <IchGuckLive> puis prendre mais d'une simple carte d'interface parallèle de port pour 50 euros
[08:18:29] <JLuc69> oui, mais je voulais pas re-investir
[08:19:47] <IchGuckLive> 20/25 est un entraînement par courroie crantée pour la balle encore nécessaires
[08:19:58] <JLuc69> ?
[08:20:15] <IchGuckLive> Stepper 400Steps/revolution 5mm Ballscrew
[08:20:30] <IchGuckLive> Divider 1.25
[08:20:46] <IchGuckLive> 20/25 timingbelt will end in 0.01mm Precission
[08:20:57] <IchGuckLive> and full force at max speed
[08:21:29] <IchGuckLive> http://foengarage.de/gears2.html
[08:22:06] <IchGuckLive> appuyez deux fois pour jouer
[10:32:14] * Loetmichel just talked his boss out of a new cooler for my cpu at home... because i have temperature issues with the I7-920 and the cooler is spare here, was ordered wrong... i THINK that should be sufficient ;-) -> http://www.cyrom.org/palbum/main.php?g2_itemId=15187
[10:33:38] <Jymmm> Loetmichel: water cooled?
[10:34:42] <Loetmichel> no, that is air cooled... look at the pic ;-)
[10:34:58] <Loetmichel> ... but slkightly bigger than the boxed variant ;-)
[10:35:27] <Jymmm> I see the copper tubing. Eh, nevermind if not liquid cooled. Just dump the whole comuter in mineral oil and be done with it!
[10:36:15] <Jymmm> Loetmichel: https://www.youtube.com/watch?v=PtufuXLvOok
[10:36:41] <Loetmichel> thats heat pipes
[10:46:47] <Jymmm> Loetmichel: Here ya go.... LN2 cooling https://www.youtube.com/watch?v=QmSBaizEqkk
[10:49:47] <Connor> WTF.. Is my email's to the Emc-Users not going through ?
[10:50:30] <Jymmm> Connor: You're a hormel meat by-product!
[10:55:32] <Connor> Finally..they came through..
[10:55:39] <Connor> geez.. what a lag..
[10:57:53] <CaptHindsight> better late than really late, like Level3 is in my neck of the webs today
[10:59:44] <Connor> CaptHindsight: Not connection lag.. mail lag..
[10:59:54] <Connor> took 15 minutes or longer for my emails to come through..
[11:05:20] <Jymmm> OMG! That's like FOREVER AND EVER!!!
[11:06:45] <CaptHindsight> I've had no email for 6+ hours, reminds me of the early 90's
[11:29:40] <syyl_ws> whas that when you made a call to check if somebody got your mail?
[11:30:00] <syyl_ws> *ringring* "hey, i sent you a mail, check it"
[11:33:12] <jthornton> a Russian crime ring has stopped e-mails at the border and is holding them for ransom
[11:34:28] <syyl_ws> they want to repack them in redcross mails?
[11:34:41] <syyl_ws> Oo
[11:52:24] <IchGuckLive> hi all B)
[11:53:28] <IchGuckLive> jthornton: its a miss even over relif supply
[11:59:06] <archivist> something is still working, a carbide hob made it from the Ukraine to me
[12:01:01] <syyl_ws> the important stuff always arives
[12:01:19] <IchGuckLive> the ukrain is in full workflow only the east Donezk is out of order
[12:01:56] <IchGuckLive> syyl_ws: i got othere expiriances as today i made some china mails on 40day + shipment
[12:02:53] <IchGuckLive> JLuc69: toujours en ligne
[12:03:45] <IchGuckLive> anonimasu: ?
[12:16:42] <dr0w> Greetings #linuxcnc
[12:17:46] <IchGuckLive> hi
[12:18:03] <IchGuckLive> what did you drawo today
[12:18:15] <IchGuckLive> hi ktchk
[12:18:32] <IchGuckLive> did you got bad weather from the storm
[12:18:33] <ktchk> HI IchGuckLive
[12:19:05] <ktchk> Bad weather not now maybe later
[12:19:18] <IchGuckLive> oh it hitted japan very hard
[12:19:34] <ktchk> Hawaii
[12:20:31] <ktchk> do you have 3d printer
[12:20:47] <IchGuckLive> http://www.nrlmry.navy.mil/tc_pages/tc_home.html
[12:21:16] <IchGuckLive> ktchk: i can get to a room where 110 3d printers are in
[12:21:54] <ktchk> school?
[12:22:26] <ktchk> mil kick me out
[12:22:31] <IchGuckLive> its more like a factory founding projekt
[12:22:49] <Jymmm> Why would you want to be in a room with glue guns?
[12:22:55] <syyl_ws> :D
[12:23:13] <IchGuckLive> Jymmm: you get wear in mind if near all run
[12:23:26] <IchGuckLive> its realy bad in shakink and looking around
[12:23:46] <syyl_ws> that doesnt make it any better
[12:23:49] <IchGuckLive> all this printers in 3 stacks and 4 lanes
[12:23:53] <syyl_ws> oO
[12:24:11] <IchGuckLive> its hot like in Black rock City
[12:24:45] <SquirrelCZECH> IchGuckLive: any pics?
[12:25:19] <IchGuckLive> SquirrelCZECH: let me look i even dont know eyactly the name of this projekt
[12:26:00] <IchGuckLive> http://www.fabbmatic.com/Produkte/Seite-/-Kategorie
[12:26:14] <IchGuckLive> this is the company they founded
[12:26:42] <syyl_ws> hey Jymmm
[12:26:47] <syyl_ws> you were right
[12:26:50] <syyl_ws> hotglue guns ;)
[12:27:32] <IchGuckLive> SquirrelCZECH: this is the room in the construction area http://www.komforthaus.com/3D-Printer-CNC
[12:29:49] <Jymmm> syyl_ws: lol
[12:30:05] <IchGuckLive> SquirrelCZECH: i dont think they show the room where they print the printer parts
[12:30:16] <IchGuckLive> https://www.youtube.com/results?q=fabbmatic
[12:30:30] <SquirrelCZECH> looks awesome :)
[12:32:06] <IchGuckLive> as you say id seen the new big 80cm size printer they made that is big
[12:33:28] <IchGuckLive> dont forget tonight is the shooting star Night of the year
[12:35:00] <ktchk> need a blackout to watch
[12:35:18] <IchGuckLive> SquirrelCZECH: weahr at all is that the printer comes with pint its own part inside programm
[12:35:31] <IchGuckLive> so itas like bot
[12:35:36] <IchGuckLive> spred all over
[12:35:55] <IchGuckLive> buy one print 10
[12:37:49] <IchGuckLive> ktchk: is the internet also controled in HK not only in china
[12:38:09] <ktchk> not as in china
[12:38:24] <ktchk> we can watch porns
[12:38:30] <IchGuckLive> O.O
[12:38:53] <IchGuckLive> in europ its on the satalite TV
[12:38:57] <ktchk> no google in china
[12:39:07] <IchGuckLive> noone got cable TV cause of ....
[12:39:40] <IchGuckLive> Baiduu in china is 99%
[12:40:18] <ktchk> sohu
[12:40:28] <IchGuckLive> the rest yioung girls like Tushu
[12:41:14] <ktchk> fc2 from japan
[12:41:27] <IchGuckLive> ktchk: do you got NHK TV
[12:41:39] <ktchk> cable only
[12:42:27] <ktchk> have to pay for it
[12:42:28] <IchGuckLive> ok there has been a TV event where the comic cloth manga girls discoused but it may changed tv time
[12:42:38] <IchGuckLive> its free here in germany
[12:43:12] <IchGuckLive> has been raly good 3d models of japan commic
[12:43:12] <ktchk> night show
[12:43:41] <IchGuckLive> How is this style named i dident grab the name
[12:44:08] <ktchk> style??
[12:44:19] <ktchk> nude
[12:45:02] <IchGuckLive> no not in the faresd dreams
[12:45:05] <IchGuckLive> http://www3.nhk.or.jp/nhkworld/english/tv/imagine/
[12:46:57] <IchGuckLive> ktchk: got it kawaii
[12:47:01] <IchGuckLive> http://www.nhk.or.jp/kawaii-i/
[12:47:18] <ktchk> 食屍鬼 in chinese
[12:48:41] <ktchk> ghoul ghose eating corpse
[12:50:22] <ktchk> I like discovery
[12:53:41] <IchGuckLive> https://www.youtube.com/watch?v=q-ne84CWmWg
[12:53:50] <IchGuckLive> hi mc500
[12:55:34] <MC500> I am assuming that my rotary encoder which says it has 9000 lines is a quad and has 36000 counts per turn, therefore INPUT_SCALE=1000 and OUTPUT_SCALE=1 does that sound correct?
[12:56:41] <MC500> hi IchGuckLive
[12:58:03] <archivist> if you have A and B then linuxcnc works on the edges so yes
[12:59:42] <MC500> I want to define my A axis as ANGULAR but I can only get it to move as LINEAR, besides there stg.ini file is there anywhere else to define a rotary axis?
[12:59:55] <IchGuckLive> MC500: just check on the 360 test turn if it works near good
[13:00:23] <IchGuckLive> A is Axis_3
[13:00:43] <IchGuckLive> XYZABCUVW Starting with 0 as count
[13:01:12] <MC500> I have to get it to work first... tuning is proving to be a bit hard I can get it to move in fast spurts or farily long ones trying to catch up with the encoders
[13:01:16] <IchGuckLive> in your in i is there AXIS = 5
[13:01:44] <MC500> I have AXIS=4
[13:02:00] <IchGuckLive> as yoou got AB b is your last its AXIS_4 and the axcpount nneds to 5th axis
[13:02:28] <IchGuckLive> you need to get one higher then the AXIS_ count
[13:02:51] <IchGuckLive> MC500: dont forget in Display GEOMETRY = ABXYZ
[13:02:52] <MC500> I only have XYZA do I need to define B to get ANGULAR?
[13:03:03] <IchGuckLive> no
[13:03:35] <MC500> cooll, will try as soon as I get there
[13:03:37] <IchGuckLive> can you please post your ini to pasebin.com
[13:04:08] <MC500> why does the ini file comments say define axis LINEAR or ROTARY it does not mention ANGULAR
[13:04:42] <IchGuckLive> JLuc69_: bonsoir
[13:05:00] <MC500> IchGuckLive I will post it as soon as I get to the machine, I am waiting for my kids to get ready for school, I very much apricate the help
[13:05:18] <IchGuckLive> MC500: what system are y<ou on
[13:06:28] <MC500> I have been bouncing back between LinuxCNC 2.6 and EMC 2.3... 2.3 seems like it may be a better match for the stg card.. If I get it working there I will hammer on 2.6 later
[13:06:46] <Connor> 2.3 ?
[13:06:49] <Connor> Ick.
[13:07:10] <IchGuckLive> go for the 2.5.4 on 10.04 if you can
[13:07:24] <MC500> 2.6 is a hard drive hot swap away...
[13:07:35] <IchGuckLive> 2.6 is good but is buggy as we get updates every wek
[13:07:57] <MC500> I was getting realtime kernel errors now and again with 2.6
[13:08:10] <IchGuckLive> http://buildbot.linuxcnc.org/
[13:08:25] <IchGuckLive> this side shoudt hold all infos and versions for you
[13:08:45] <IchGuckLive> MC500: that is on timing issues
[13:08:56] <MC500> 2.3 is what was working before I lost the drive....
[13:09:28] <IchGuckLive> yea it chaged all on 2.4.2
[13:09:29] <MC500> IchGuckLife the error would pop up after the machine was idle all nite...
[13:10:11] <IchGuckLive> 2.5.4 is the best ypou shoudt stay long time for now as ypou did on 2.3
[13:10:47] <Loetmichel> *HA!* much better... only problem: i cant close the sidepanel anymore, the heatsink is about 10mm to high... :-( -> http://www.cyrom.org/palbum/main.php?g2_itemId=15190
[13:11:02] <MC500> IchGuckLife I will install 2.5.4 thank you
[13:11:34] <pcw_home> you get a real time error with just a 1 KHz servo thread? (I am assuming the stg card is a servo controller)
[13:14:10] <MC500> I get the error when machine is idle, mill is not even on..
[13:14:14] <MC500> random times
[13:14:20] <MC500> it can go a day with no error
[13:14:35] <MC500> but that was only with 2.6
[13:14:43] <IchGuckLive> michel you will find a one that fitts in your "krabbelkiste"
[13:14:50] <pcw_home> is there a base thread?
[13:15:26] <pcw_home> (normally a servo system doesn't need/want one)
[13:15:59] <MC500> will check when I get there
[13:17:00] <pcw_home> a real time error on a 1 KHz servo thread means >= 200 usec latency which is pretty bad
[13:18:14] <MC500> well off to school bbl thanks for all the help!
[13:31:42] <IchGuckLive> ok im off for today tomorrow is the last workday in my worklife so far after 48 years of "hard" work it is ending
[13:31:51] <IchGuckLive> BYE
[13:49:10] <klick0> anyone know how to use halcmd to show a variable in a running system? Like for instance the X position. I know in g-code it's #5420, is there a halcmd way to show that variable? I did go through all the pins, specifically axis.0.free-pos-cmd, axis.0.motor-offset axis.0.motor-pos-cmd and tried adding/subtracting them, but they don't come to the actual X position, so i must be missing something else, but I don't see any other vari
[13:49:10] <klick0> ables that would give me info I need
[13:52:05] <JT-Shop> your wanting to see the same number that is on the DRO for X
[13:52:07] <JT-Shop> ?
[13:52:13] <klick0> correct
[13:52:16] <klick0> from the command line
[13:52:29] <klick0> i swear i figured this out years ago, but have forgotten how i did it
[13:54:19] <CaptHindsight> http://3dprintingindustry.com/wp-content/uploads/2014/08/rotary-3d-printing.gif
[13:58:55] <JT-Shop> klick0, are you wanting the actual machine position or the position with all the offsets applied?
[13:59:24] <klick0> the position with all the offset's applied
[13:59:30] <klick0> what it shows in the axis interface
[14:00:07] <cpresser> klick0: i think its 'motion.xx...' letme check...
[14:00:21] <klick0> that's why I figured if I just subtracted the offset's from the position, i'd eventually figure out the way to do it.
[14:00:33] <klick0> thanks, i'll look at that as well right now
[14:00:48] <cpresser> klick0: halui.axis.0.pos-relative
[14:00:57] <cpresser> that works (when you have halui loaded)
[14:01:35] <cpresser> i use thos pins to output data to my digital DRO
[14:01:58] <klick0> hmm, ok, i'm running the command via command line, from another room, I want to monitor the CNC machine from somewhere else, so that's why i'm using halcmd
[14:02:18] <klick0> oh, hmm, is halui command line?
[14:02:21] <cpresser> you only need to load the halui module in the ini
[14:02:28] <klick0> ohh, ok
[14:02:30] <cpresser> then you can access that pin via halcmd
[14:09:01] <klick0> thanks everyone
[15:00:35] <MC500> This is my stg.ini file, I just changed from LINEAR to ANGULAR and the A axis wont move, if anyone can have a look I would apricate it.
[15:00:42] <MC500> http://pastebin.com/iuDrgUU6
[15:08:18] <cradek> that LINEAR and ANGULAR doesn't have any effect. so the actual problem is it doesn't move - do you mean you get no output on the dac? what are you actually seeing?
[15:08:46] <MC500> it moves when I change to LINEAR
[15:09:16] <cradek> do you mean when you cange [AXIS_3]TYPE ?
[15:09:24] <MC500> yes
[15:09:56] <MC500> I must have some settings that pretain only to LINEAR and or not ones I need for ANGULAR
[15:10:15] <cradek> are you sure you didn't also change something else?
[15:10:41] <MC500> only one word, and this time I changed Detree units from 1.0 to degree
[15:10:43] <cradek> can you say what you see when it doesn't move? does the dro change? are you jogging or running gcode? do you get following error?
[15:11:11] <MC500> Im just jogging DRO and axis move when in LINEAR
[15:11:22] <MC500> not tuned of course
[15:11:39] <MC500> no no folowing error
[15:13:57] <cradek> your scale on the xyz is 50800 counts per mm
[15:14:07] <cradek> are you sure your scale on the rotary isn't WAY WAY off?
[15:14:48] <cradek> if you have a similar kind of encoder I'd expect the scale to be WAY higher
[15:15:20] <MC500> the scale on the rotary is differant, its a rotary encoder with 9000 lines, and I figure its a quad so that 36000 hence 1000 to 1 per degree
[15:15:50] <cradek> the encoder isn't on the worm?
[15:15:59] <MC500> no, on the axis directly
[15:16:06] <cradek> ah ok
[15:17:16] <MC500> is this right or does this matter?
[15:17:21] <MC500> # COORDINATES = X Y Z R P W COORDINATES = X Y Z A
[15:17:33] <MC500> I have X Y Z A
[15:17:40] <MC500> should it be X Y Z R P W?
[15:18:05] <cradek> no you have it right
[15:18:14] <cradek> maybe you should check out sim/axis/axis_9axis.ini
[15:18:29] <cradek> make sure you have the DEFAULT_ANGULAR_VELOCITY, MAX_ANGULAR_VELOCITY, etc etc
[15:18:59] <PetefromTn_> https://www.youtube.com/watch?v=DvDwlyGthtY This makes me smile ;)
[15:19:23] <dr0w> I'm going to attempt to ask a semi-intelligent question..
[15:19:33] <tjtr33> i quick looked into smithy xyza .ini, they have a Default_Angular_Velocity
[15:19:40] <tjtr33> doh cradeks quicker
[15:20:07] <cradek> yeah maybe you're just missing some stuff, since it looks like you're bringing forward a very old ini file
[15:20:16] <dr0w> I have an *old* MAXNC T2, I cracked open the controller box. The stepper driver is a series of TIP120s with 7400N NAND gates
[15:20:21] <MC500> Ill screw with that, I know at one point ANGULAR worked some versions of EMC ago, but the guy who had this running had to switcth to LINEAR for some reason
[15:20:42] <MC500> yea I will compare it to the example ini and see if there is any ANGULAR or degree stuff missing
[15:20:43] <cradek> this makes me think the ini is very old: LINEAR_UNITS = 0.03937007874016
[15:20:50] <cradek> so check everything carefully against a modern one
[15:20:58] <dr0w> The pinout for MAXNC T2 CL isn't relevant to this model.
[15:21:12] <MC500> I am pieceing it together from old backups and so forth it probably quite mangled
[15:21:19] <cradek> dr0w: that's probably a winding-activation driver
[15:21:37] <dr0w> The MAXNC software outputs quad on 4 pins for each axis
[15:21:50] <cradek> dr0w: yep, verrry low performance
[15:22:13] <cradek> it's not quadrature, it's (probably) half step winding-activation
[15:22:31] <dr0w> ideally, I'd like to scrap the MAXNC controller.. but in the meantime.. looking at 4 phase linuxcnc step types..
[15:22:31] <tjtr33> suggest comparing to Tormach's pcnc-100-SeriesII.ini ( those are captial I's damn font )
[15:22:39] <MC500> all it says on the encoder is 9000 lines I dont know much about it and the company is out of business
[15:22:54] <dr0w> ..which step type might I be taking a closer look at? ;)
[15:23:11] <cradek> dr0w: probably 9
[15:23:33] <dr0w> gotcha
[15:24:49] <cradek> that's the one that goes A AB B BC C CD D DA
[15:26:02] <dr0w> I was trying to record the output with scope so I can compare it to the others.. but proving to be a PITA
[15:26:47] <cradek> you mean record the maxnc software output?
[15:27:08] <dr0w> right
[15:27:11] <cradek> aha
[15:27:31] <cradek> I did the same thing on one of them 15+ years ago
[15:29:51] <MC500> why does it say "# type of axis, LINEAR vs. ROTARY" when it means ANGULAR is that a typo or is ANGULAR somthing differant?
[15:31:41] <dr0w> cradek: I stumbled upon your MAXNC mill, btw... very cool!
[15:32:07] <cradek> they are spelled LINEAR and ANGULAR. I don't know why your old file's comment is wrong.
[15:32:24] <cradek> dr0w: heh, it doesn't look like that anymore - but I'm still using some parts of it.
[15:33:54] <cradek> here's another incarnation: https://www.youtube.com/watch?v=aF7C8d4d0nc
[15:36:23] <dr0w> 5-axis.. wow
[15:37:01] <cradek> it's also sometimes a XYZBC setup
[15:37:34] <cradek> haha wow https://www.youtube.com/watch?v=1EYaM4FkASA
[15:37:43] <cradek> there are a lot of videos of it over the years
[15:38:05] <cradek> this was at an emc fest in '08 when it was a XYZBC demo
[15:38:48] <MC500> cradek I put in DEFAULT_ANGULAR_VELOCITY = 45.0 MAX_ANGULAR_VELOCITY = 90.0 MAX_LINEAR_VELOCITY = 1.2 and it moves now... thanks
[15:38:54] <cradek> yay
[15:42:26] <MC500> Tuning is my next task.. I have the scale at 1000 to 1 which I belive to be correct. Then what, do I set Max Velocity to 5 and P to whatever form my PID loop and everything else to 0 untill I get a pulse... .that is what I have read anyway
[15:44:52] <MC500> a relic I found in an old ini file had Deadband set to 0.000381 whats tha for?
[15:45:08] <cradek> are your amps velocity mode?
[15:45:22] <MC500> how do I tell?
[15:45:34] <cradek> ummm - is there tach feedback?
[15:45:42] <dr0w> cradek: what CAM do you use for the 5-axis stuff?
[15:46:01] <cradek> dr0w: none. those were all hand-written
[15:46:41] <MC500> no feedback that I am aware of, nothing exterior to EMC
[15:46:44] <dr0w> wow
[15:47:12] <cradek> nothing goes directly to the amps?
[15:47:47] <MC500> no external display, I do have an amp meter but I belive that is hooked up to the spindle
[15:47:50] <cradek> you can read about deadband in the pid manpage -- but I've never really had any luck with it and I leave it set to 0
[15:48:11] <MC500> Ill do that as I am not sure why it was set
[15:48:38] <MC500> so should I get some sort of amp probe like a clamp on for tuning?
[15:49:12] <PetefromTn_> +cradek Hey man that is really cool. How did you go about programming that monster?
[15:50:06] <cradek> it's pretty easy if you do tool length and uvw (tool coordinate system) in the kins
[15:50:57] <PetefromTn_> so most of that is hand coded then?
[15:50:58] <cradek> like the ending spiral cut that does the whole ball finishing with the side of the tool - that was probably one line of gcode, just a G1
[15:51:19] <cradek> yeah all of it. I've never had or used any 5 axis cam
[15:54:57] <PetefromTn_> sweet man you got some SKILLS LOL
[15:55:45] <PetefromTn_> I have been working on a design for another custom Scope riser rail here lately.
[15:56:52] <PetefromTn_> I THINK it looks cool but I was wondering if you guys cold give me your input on it. It was designed to follow the lines of a particular rifle.
[15:57:48] <PetefromTn_> wanna see it?
[16:20:40] <dr0w> cradek: thanks for the help!
[16:23:16] <Deejay> gn8
[16:36:28] <CaptHindsight> anyone have a favorite source for small <1/2hp chillers like these? http://www.newegg.com/Product/Product.aspx?Item=9SIA2HK1169886&nm_mc=KNC-GoogleMKP&cm_mmc=KNC-GoogleMKP-_-pla-_-Fish+-+Aquariums%2c+Hoods+%26+Stands-_-9SIA2HK1169886&ef_id=U@qERAAAAO82wmUm:20140812211652:s
[16:37:50] <CaptHindsight> https://www.1000bulbs.com/category/water-chillers/
[16:49:54] <anarchos2> Hi, I just installed weezy from the ISO on linuxcnc.org, all is working great, but i just did a aptitude update/upgrade, and it started downloading LinuxCNC-2.7?
[16:50:27] <anarchos2> is that going to overwrite 2.6? do i somehow have the testing apt source enabled that i shouldn't have?
[16:57:09] <anarchos2> i think if i comment out the buildbot.linuxcnc.org entries in /etc/apt/sources.list.d/linuxcnc.list it should just leave me with the stable version, right?
[17:08:19] <tjtr33> CaptHindsight, we always used Remcor, over on River Rd , maybe Bensenville for WEDM's . dunno how small they make 'em
[17:10:19] <CaptHindsight> tjtr33: thanks, their smallest one might be a fit
[17:50:15] <chopper791> Update on the issue I was having with my mill. It was scaling, changed it to account for the metric screws and problem solved.
[17:50:55] <anarchos2> Speaking of, if i have imperial screws, can I run my mill in metric?
[17:52:06] <chopper791> Yes you can as long as you account for them in your config.
[17:52:34] <chopper791> I have done this many times but somehow forgot to account for metric screws when I was setting this machine up
[17:52:49] <chopper791> :-/
[17:54:14] <CaptHindsight> chopper791: glad it worked
[17:54:16] <chopper791> Thanks to the fine group on here, they quickly reminded me to do soand now my machine is rocking and rolling
[18:24:45] <klaus_> Hallo und einen guten Abend zusammen
[18:26:49] <klaus_> ich bin neu hier und habe erst seit gestern Linux 12.04 meine Frage ist läuft Linuxcnc unter 12.04 ?
[18:45:04] <klaus_> bye
[19:16:06] <anarchos2> chopper791, i wonder if my inch to mm converts exactly
[19:16:29] <MC500> Should I be able to increase Velocity or P in the calibration window and have said axis go nuts or do I have to do somthing to get the axis moving first?
[19:16:30] <anarchos2> apparently it does
[19:16:36] <anarchos2> .2 inch = 5.08mm exactly
[19:24:15] <Jymmm> Who says electric chain saw suck... http://www.yaplakal.com/forum28/topic746721.html
[19:28:20] <anarchos2> any suggestions on a good "cheap" dial indicator? maybe a digital one?
[19:28:29] <XXCoder1> aliexpress
[19:28:44] <zeeshan> all the chinese indicators ive tried out
[19:28:46] <zeeshan> mechanical
[19:28:53] <zeeshan> have an error over their whole range
[19:28:56] <zeeshan> around 5-6 thou
[19:28:59] <zeeshan> :(
[19:29:10] <zeeshan> <- indicator hoarder/master
[19:29:26] <zeeshan> http://i.imgur.com/Q87RZTz.jpg
[19:29:31] <zeeshan> i has 2 drawers
[19:29:48] <zeeshan> http://i.imgur.com/zcA65F1.jpg
[19:29:49] <zeeshan> moar
[19:30:04] <XXCoder1> lol
[19:30:12] <XXCoder1> talking about dial indictors
[19:30:20] <anarchos2_> oops wrong button
[19:30:23] <XXCoder1> whats best way for me to attch it to chuck
[19:30:33] <zeeshan> XXCoder1: you mean inside a chuck?
[19:30:35] <anarchos2> oh no shit, i'm just not good at this xfce thing.
[19:31:04] <anarchos2> zeeshan, any recommendations for one?
[19:31:06] <XXCoder1> well in a way that I can test stuff by moving gantry around
[19:31:13] <zeeshan> anarchos2: what are you trying to do
[19:31:26] <zeeshan> XXCoder1: sure it needs t obe in a chuck?
[19:31:28] <zeeshan> i really like using this:
[19:31:30] <anarchos2> just set up my new mini mill, check if it's accurate, etc
[19:31:30] <zeeshan> http://www.amazon.com/NOGA-NogaFlex-Holder-Model-NF1018/dp/B0006J49MA
[19:31:36] <zeeshan> you ca nget that for 39$ on use-enco
[19:31:47] <zeeshan> anarchos2: so you'll need the entire range of the indicator
[19:31:49] <zeeshan> to do that
[19:31:58] <XXCoder1> not bad
[19:32:02] <XXCoder1> lemme look at aliexpress
[19:32:07] <zeeshan> XXCoder1: get the real one
[19:32:08] <anarchos2> yea
[19:32:14] <zeeshan> theres lots of videos of chinese vs real noga online
[19:32:15] <zeeshan> on youtube
[19:32:16] <XXCoder1> real one need real money
[19:32:19] <zeeshan> theres no comparison one
[19:32:26] <zeeshan> the chinese one moves on you
[19:32:37] <zeeshan> if you really want a chinese one
[19:32:41] <zeeshan> look at the brand asimeto
[19:33:15] <XXCoder1> no match
[19:34:20] <zeeshan> anarchos2:
[19:34:21] <zeeshan> http://www.kijiji.ca/v-hand-tool/city-of-toronto/mitutoyo-dial-indicator-2416f-001-x1/594004538?enableSearchNavigationFlag=true
[19:34:27] <zeeshan> 50$!
[19:34:44] <zeeshan> looks like its in good condition
[19:35:27] <XXCoder1> noga is ALL deburr in aliexpress. weird
[19:35:31] <XXCoder1> deburr tool
[19:36:22] <MC500> where do I get older iso images to install say LinuxCNC 2.5.1
[19:36:34] <zeeshan> http://www.use-enco.com/CGI/INSRIT?PARTPG=INLMIP&PMPXNO=3377530&PMAKA=890-1343
[19:36:38] <zeeshan> damn they're jnot on sale anymore
[19:36:40] <zeeshan> it was 39$ on sale
[19:36:43] <zeeshan> when i bought it
[19:37:26] <MC500> Noga is awsome
[19:37:51] <zeeshan> http://www.shars.com/products/view/1456/Test_Indicator_Holder_Arm_Only
[19:37:55] <zeeshan> i have that ..
[19:38:05] <zeeshan> it moves around without much effort
[19:38:07] <zeeshan> noga is rock hard
[19:38:23] <XXCoder1> zee I do have a cheat idea, get a thread bar, attach adoptor to hold dial indictor to it
[19:39:20] <zeeshan> XXCoder1: all depends on you
[19:39:27] <XXCoder1> yeah
[19:39:32] <zeeshan> i had to measure end play for a transmission shaft
[19:39:36] <zeeshan> i made some fancy adapter
[19:39:37] <zeeshan> :D
[19:39:48] <zeeshan> by fancy adapter i mean a flat plate
[19:39:50] <zeeshan> with 2 holes in it
[19:39:50] <zeeshan> :D
[19:40:15] <XXCoder1> lol
[19:43:54] <anarchos2> http://www.ebay.ca/itm/Mitutoyo-Absolute-543-276B-Digimatic-Indicator-with-Slotted-Back-ID-C1012CEB-/191147087029?pt=LH_DefaultDomain_0&hash=item2c814114b5&_uhb=1
[19:44:15] <zeeshan> i personally had 2 of those indicators
[19:44:17] <zeeshan> i sold them
[19:44:43] <anarchos2> no good?
[19:44:49] <zeeshan> no, they are accurate
[19:44:59] <zeeshan> but they problem is an analog gauge is much easier to "zero out"
[19:45:16] <zeeshan> like for example, when you're trying to dial in a piece with a 4jaw chuck on a lathe
[19:45:23] <zeeshan> you want it to run concentric with the spindle
[19:45:44] <zeeshan> with a digital gauge, the numbers fly around and it takes time to think about whats going on
[19:45:51] <zeeshan> with analog gauge you can see the sweep of the needle..
[19:45:56] <XXCoder1> yeah
[19:46:03] <Tom_itx> so have one of both
[19:46:05] <XXCoder1> thats why i got dial indictor
[19:46:45] <zeeshan> http://www.diatest.com/uploads/pics/06-dial-indicators2.png
[19:46:49] <zeeshan> ive been looking for one of those
[19:46:51] <zeeshan> they are AWESOME
[19:46:57] <zeeshan> its the best of both worlds
[19:49:11] <XXCoder1> interesting
[19:49:16] <XXCoder1> wonder what its sample rate is
[19:49:35] <anarchos2> what would be a good choice for a sub $50 analogue indicator?
[19:49:51] <jdh> I a mitutoyo digi indicator. Never found a use for it
[19:50:10] <archivist> jdh, send it to me :)
[19:50:16] <zeeshan> one good use of the digital indicator is
[19:50:19] <zeeshan> i can hook it up to labview
[19:50:33] <zeeshan> when measuring deflection of a strucutral member
[19:50:39] <zeeshan> and log
[19:50:40] <jdh> woohoo
[19:50:46] <archivist> mine has a pointer and changes colour http://www.archivist.info/cnc/screw_error/IMG_1673_800.JPG
[19:51:03] <zeeshan> archivist:
[19:51:05] <zeeshan> what model # is that
[19:53:33] <jdh> I like the pointer. Mine is just a number
[19:54:22] <archivist> 543-554-1
[19:54:46] <archivist> ID-F130E
[19:55:35] <archivist> has a limit mode where it is green/red
[20:00:06] <zeeshan> http://www.amazon.com/Mitutoyo-543-552A-Absolute-Digimatic-Indicator/dp/B0006J44WK
[20:00:11] <zeeshan> yes, a little too expensive for me
[20:00:11] <zeeshan> :D
[20:00:44] <zeeshan> http://www.ebay.com/itm/Mitutoyo-Digital-Indicator-Model-543-552-1-Range-1-0-/351115285542?pt=LH_DefaultDomain_0&hash=item51c01a1426
[20:00:47] <zeeshan> 225$ used..
[20:00:48] <zeeshan> lol
[20:04:34] <archivist> I got mine dead, the 5v regulator chip was fried
[20:05:02] <zeeshan> easy fix
[20:05:03] <zeeshan> :D
[20:05:51] <archivist> bought something else and the guy offered it when I went to collect
[20:07:04] <archivist> used to work he said but he admitted shoving the wrong wallwart into it
[20:07:40] <zeeshan> archivist: how much is a van keuren 1.25 diameter
[20:07:44] <zeeshan> by 1/2" optical flat worth
[20:07:46] <zeeshan> no scratches
[20:07:55] <zeeshan> brand new
[20:09:26] <zeeshan> pretty please tell meee
[20:09:37] <archivist> no idea, usually silly expensive probably
[20:09:54] <zeeshan> i might have found one finally
[20:09:55] <MC500> is the only option to install LinuxCNC 2.5x upgrading or are there 2.5x iso's out there?
[20:09:55] <zeeshan> thats cheap
[20:10:48] <archivist> I got mine cheap http://www.collection.archivist.info/searchv13.php?searchstr=optical+PD
[20:10:58] <zeeshan> 1.25" dia is plenty right?
[20:11:01] <zeeshan> to check out flatness of anvils
[20:11:40] <MC500> I make optical flats
[20:11:48] <archivist> mine are calibrated thickness for various rotation angles of a micrometer
[20:11:49] <zeeshan> mc500 for free? :)
[20:12:37] <MC500> small ones are not that much.. I can make up to a meter
[20:13:19] <MC500> certified flat is very spendy.. the one for our interferometer was like 10k
[20:14:40] <archivist> there is one on fleabay at £48
[20:15:10] <MC500> how big is it?
[20:15:58] <archivist> http://www.ebay.co.uk/itm/Optical-Flat-Surface-Finish-Testing-Coventry-Gauge-2-Micron-50mm-Diameter-/370940164546?pt=UK_Measuring_Tools_Levels&hash=item565dc1b9c2
[20:17:13] <zeeshan> archivist: is 1.25" plenty
[20:17:16] <zeeshan> for micrometer checking?
[20:17:16] <zeeshan> :P
[20:17:46] <archivist> mine are only 1" dia
[20:18:09] <zeeshan> the idea is you put the flat on there
[20:18:15] <zeeshan> and you will see different patterns?
[20:18:49] <archivist> if its clean enough and you have monochrome light
[20:18:56] <zeeshan> http://www.mitutoyo.co.uk/media/catalog/product/cache/1/thumbnail/9df78eab33525d08d6e5fb8d27136e95/o/p/optical-flat_1.jpg
[20:18:57] <zeeshan> those lines
[20:19:40] <zeeshan> http://www.edmundoptics.com/technical-support/technical-library/marketing-literature/files/eo-optical-flat-manual.pdf
[20:19:43] <zeeshan> nm this shows the patterns
[20:19:47] <zeeshan> it should be straight lines
[20:19:50] <zeeshan> not bendy lines
[20:19:55] <archivist> you can see colour fringes there due to white light
[20:20:08] <zeeshan> http://www.edmundoptics.com/technical-support/technical-library/marketing-literature/files/eo-optical-flat-manual.pdf
[20:20:11] <zeeshan> page 11
[20:20:14] <zeeshan> figure 11
[20:20:45] <MC500> is 2 microns how flat it is... cuz that aint that flat
[20:21:32] <zeeshan> i can "borrow" a monochromatic light from work lab
[20:21:45] <archivist> 2 microns is ok for testing workshop grade I suppose
[20:23:00] <MC500> http://www.edmundoptics.com/optics/windows-diffusers/interferometry-windows/single-surface-optical-flats/1906
[20:23:04] <MC500> those are way flat
[20:23:26] <zeeshan> the one im looking at is .000004"
[20:23:29] <MC500> 1/4 wafe should be nuff,,, some of those are 20th wave and only 150 bucks
[20:23:37] <zeeshan> .1 micron
[20:23:46] <MC500> yea
[20:24:04] <zeeshan> its considered a "working grade"
[20:24:22] <zeeshan> master is 0.000002"
[20:24:28] <zeeshan> reference is 0.000001"
[20:24:53] <MC500> not sure what working grade is... there scientific grade for sure, we would use them in lasers and what not
[20:25:02] <MC500> you can get them out of most any material
[20:25:14] <MC500> we even make them out of silicon carbide
[20:25:31] <zeeshan> MC500: give me some "scrap ones"
[20:25:31] <zeeshan> :D
[20:25:37] <zeeshan> MC500: where do you work
[20:25:58] <MC500> Maui company in Maui.. Hnu Photonics
[20:26:09] <MC500> my rather
[20:26:18] <zeeshan> haha that must be nice.
[20:26:21] <zeeshan> working in hawaii..
[20:26:25] <zeeshan> is there a lot of eng jobs there?
[20:26:36] <MC500> hnuphotonics.com
[20:26:41] <zeeshan> yea im checking out the website
[20:26:43] <MC500> yea come get my mill running...
[20:26:43] <zeeshan> looks like a cool company
[20:27:26] <MC500> thanks
[20:27:49] <MC500> we just moved... mill broke in the move.. setting up large optics shop
[20:27:53] <MC500> and machine shop
[20:28:01] <zeeshan> http://www.ebay.com/itm/Van-Keuren-Optical-Flat-with-Case-/201147313047?pt=LH_DefaultDomain_0&autorefresh=true&pb=2&nma=true&si=Hb4f8mwY7yF4uCS5PfzAmBlDMKQ%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
[20:28:02] <zeeshan> yay
[20:28:03] <zeeshan> i won!
[20:28:06] <zeeshan> 25$
[20:28:23] <MC500> the LinuxCNC mill was doing diamond turning of optics, very cool stuff
[20:28:36] <zeeshan> whats wrong with the mill
[20:28:54] <MC500> the guy who built it didnt backup the hard drive and the drive went
[20:29:03] <zeeshan> eeek
[20:29:12] <MC500> I am trying to put it back together with scraps from other working versions
[20:29:17] <zeeshan> your hal file is gone :{
[20:29:21] <MC500> yea
[20:29:30] <zeeshan> what kind of mill
[20:29:47] <MC500> its a Maho MC500 cool german stuff
[20:30:10] <MC500> I have it retrofited with Baldor AC servo moters and amps
[20:30:22] <MC500> with very precition Linear scales
[20:31:05] <MC500> the rotary scale is 36000 counts
[20:31:32] <MC500> I cant figure out how to tune it
[20:32:04] <MC500> The guy who built it spent weeks tuning it
[20:32:26] <MC500> I am sending the drive off for recovery, but not sure how that will go
[20:32:43] <zeeshan> im sure your hal file can be saved
[20:34:09] <MC500> what is the importance of the hal file? would it be the core_server.hal I thought that was just programmed to the type of card you have which is a servo to go in my case
[20:34:29] <MC500> I have older copies of it and it looks like a 4th axis was added to it but not much more
[20:34:49] <zeeshan> theres a couple files important
[20:34:59] <zeeshan> the hal file contains all your i/o pins
[20:35:09] <zeeshan> and configures a lot of stuff
[20:35:16] <MC500> I have all the axis working as far as io pins and stuff
[20:35:19] <zeeshan> your ini file has all your motor stuff
[20:35:23] <MC500> tuning is what I lack
[20:35:30] <MC500> yea the stg.ini
[20:35:35] <MC500> the one I have is old
[20:35:56] <MC500> Velocity and PID and so forth
[20:35:59] <zeeshan> yep
[20:36:06] <zeeshan> i havent tuned a servo system before but i'm sure its not too bad
[20:36:08] <MC500> that is the golden bee bee in my case
[20:36:49] <MC500> what I read seems to imply that with just the calibration window you can set values up and up till the motors start to ocolate
[20:36:51] <CaptHindsight> MC500: we'll help you tune it
[20:37:02] <CaptHindsight> I mostly use servos
[20:37:53] <MC500> cool what do I do first???
[20:38:07] <MC500> I belive I have the scales set correctly
[20:38:10] <zeeshan> CaptHindsight: do you guys do root locus stuff
[20:38:12] <zeeshan> to tune?
[20:38:28] <MC500> dono what that is
[20:40:15] <MC500> http://pastebin.com/iuDrgUU6 that is a recent stg.ini with my current settings
[20:40:52] <MC500> cradec had me add some undocumented stuff and I was able to get the 4th axis running as ANGULAR
[20:40:54] <zeeshan> one method i learned about in schoo
[20:41:01] <zeeshan> was "ziegler nichols" method
[20:41:16] <CaptHindsight> http://www.linuxcnc.org/docs/2.5/pdf/LinuxCNC_Integrator_Manual.pdf
[20:41:18] <XXCoder1> it involves deadfall hammer
[20:41:28] <zeeshan> https://controls.engin.umich.edu/wiki/index.php/PIDTuningClassical#Ziegler-Nichols_closed-loop_tuning_method
[20:41:28] <XXCoder1> deadblow that is
[20:41:37] <CaptHindsight> pages 186 -188
[20:42:15] <CaptHindsight> http://www.linuxcnc.org/index.php/english/forum/10-advanced-configuration/14483-servo-tuning-pid-and-ffn has a good discussion
[20:42:40] <zeeshan> ha
[20:42:47] <zeeshan> they cover ziegler nichols method
[20:42:49] <zeeshan>
[20:43:21] <zeeshan> so servo tuning is really easy then
[20:43:29] <zeeshan> set i and d to zero
[20:43:44] <zeeshan> keep increasing p till you get oscillation
[20:43:52] <zeeshan> then use the formulas
[20:44:03] <MC500> yea I cant get oscillation
[20:44:04] <CaptHindsight> http://www.linuxcnc.org/emc2/index.php/russian/forum/32-documents/26649-pid-tuning-by-graph
[20:44:44] <zeeshan> MC500: apparently you will at some point
[20:44:46] <CaptHindsight> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?PWM_Servo_Amplifiers
[20:44:47] <zeeshan> keep increasing P!
[20:45:28] <CaptHindsight> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?Tuning_LinuxCNC/HAL_PID_Loops
[20:45:58] <XXCoder1> damn
[20:46:04] <XXCoder1> microsft makes cool stuff smetimes
[20:46:05] <XXCoder1> https://research.microsoft.com/en-us/um/redmond/projects/hyperlapse/
[20:46:37] <MC500> well I have some reading to do...
[20:46:56] <CaptHindsight> get familiar first
[20:47:15] <CaptHindsight> I'll have to read the backlog to see what servo hardware you're using
[20:47:25] <MC500> so zeeshan if I just have the calibration window open and I keep kicking P with everything else at 0 it should start ocilating?
[20:47:52] <MC500> stg ISA card with baldor amplifiers/AC servo motors
[20:48:46] <CaptHindsight> if you give the motor a bump
[20:49:32] <CaptHindsight> mc500 check page # 188 in the integrator manual
[20:49:37] <MC500> yea so I do have to bump it... thought so.. but if everything is 0 but P it never ocilates.. it just zings and faults
[20:50:50] <CaptHindsight> that gets you close, the rest you do with halscope
[20:51:28] <MC500> I read that page a while ago (just that one was posted at linuxcnc.org) ok halscope.... what pins do I monitor with hal scope.. pid3.bla.bla (its axis 4 I am tuning first)
[20:53:38] <CaptHindsight> http://wiki.linuxcnc.org/cgi-bin/wiki.pl?PWM_Servo_Amplifiers
[20:53:50] <CaptHindsight> too tired to type
[20:54:44] <MC500> I have that in my hand... those are not in my hal scope exatly...
[20:56:01] <anarchos2> hmm my Y axis seems to be messing up...if i run the demo g code "LinuxCNC" multiple times in shifts all the lettering up about .5mm each time. X axis is spot on
[20:56:19] <anarchos2> using a pen as a tool and paper as the material :P
[20:56:34] <MC500> well I have to go digest all this... I will be back when I am more cognitive.... thanks for the help!!!!
[20:56:52] <anarchos2> the weird thing is it's super consistant...if it was missing steps and what not you'd thing it would be erratic
[20:58:09] <CaptHindsight> anarchos2: how do you zero?
[20:59:01] <CaptHindsight> anarchos2: how about if you jog Y a set distance back and forth?
[20:59:31] <CaptHindsight> set/same, say 2" or 20mm
[20:59:57] <CaptHindsight> does it shift 0.5mm every time?
[21:10:14] <zeeshan> now im tempted to get a servo
[21:10:20] <zeeshan> this tuning stuff is interesting
[21:10:25] <zeeshan> i learned about all this in control class
[21:10:29] <zeeshan> but ididnt know why i was learning it
[21:10:29] <zeeshan> :D
[21:10:31] <zeeshan> now i know
[21:14:46] <CaptHindsight> http://en.wikipedia.org/wiki/PID_controller#Overview_of_methods
[21:17:14] <anarchos2> CaptHindsight, i'm just zeroing at my table limits (i don't have limit/home switches yet) and hitting go
[21:17:43] <anarchos2> and then once it finished, i hit the green reload button and then the play button
[21:17:53] <anarchos2> and it moves back and starts again but 0.5 mm shifted up
[21:18:04] <zeeshan> sounds like a backlash error?
[21:18:11] <zeeshan> actually nm
[21:18:12] <zeeshan> i dunno :P
[21:19:13] <CaptHindsight> anarchos2: do you also Zero it every time before you run it again?
[21:19:23] <anarchos2> no
[21:19:46] <CaptHindsight> whats the DRO have for Y at the end of the demo?
[21:19:55] <zeeshan> anarchos2: why dont you do a simple test?
[21:20:09] <zeeshan> move each axis 1"
[21:20:13] <zeeshan> and back another 1"
[21:20:20] <CaptHindsight> http://www.ecnmag.com/articles/2011/07/pid-based-servo-tuning-black-art-rocket-science-or-walk-park
[21:20:22] <zeeshan> and see if they end up back to where they start
[21:20:26] <zeeshan> or draw a circle
[21:20:40] <anarchos2> yeah hmm
[21:20:58] <anarchos2> i'm at 14.831 on the Y, gonna run it again and see what happens
[21:23:00] <anarchos2> exact same on second pass, but it's shifted
[21:24:20] <zeeshan> anarchos2: if you were nearby
[21:24:24] <zeeshan> id bring over a dial indicator
[21:24:27] <zeeshan> !
[21:25:23] <zeeshan> hi PetefromTn_andro
[21:25:42] <PetefromTn_andro> Hey zeeshan
[21:26:12] <PetefromTn_andro> Whatzgoinon?
[21:26:47] <zeeshan> bought an optical flat
[21:26:51] <zeeshan> ebay auction :D
[21:26:52] <zeeshan> 25$!!
[21:27:01] <PetefromTn_andro> Cool
[21:27:05] <zeeshan> i want to inspect my mics
[21:28:00] <zeeshan> what are you upto
[21:28:01] <PetefromTn_andro> Just got back from mowing the damn lawn lol
[21:28:03] <zeeshan> did you make that copper part?
[21:28:18] <PetefromTn_andro> Actually no well sorta
[21:28:44] <PetefromTn_andro> We machined it another way and also did some lathe work on it.
[21:29:07] <PetefromTn_andro> He left happy hehe
[21:29:48] <PetefromTn_andro> I picked up some more 6061 this morning in knoxvegas
[21:30:42] <PetefromTn_andro> Also ordered about a 12 foot stick of 1x2 6061 for this other rail design I am about ready to cut
[21:31:12] <PetefromTn_andro> Should make about fifteen of them for me
[21:31:30] <zeeshan> nice
[21:31:53] <PetefromTn_andro> They ran out of it when I was there today or I would have just grabbed it when I was there.
[21:32:22] <PetefromTn_andro> Supposed to be there like Wednesday or thursday morning
[21:33:19] <PetefromTn_andro> I have been getting a bunch of orders for the ones you guys saw lately and the new design should sell pretty good too I hope.
[21:33:24] <zeeshan> is metal realtively hard to get there?
[21:33:29] <zeeshan> (locally)
[21:33:33] <zeeshan> relatively
[21:33:38] <PetefromTn_andro> No not really
[21:33:54] <zeeshan> like isn't 1x2 pretty standard to stock?
[21:34:10] <PetefromTn_andro> I can order pretty much whatever I want and pick it up in a day or so
[21:34:16] <zeeshan> ah
[21:34:42] <PetefromTn_andro> Yeah but they said someone else local bought a bunch of it and they ran out.
[21:34:44] <zeeshan> i was just curious cause we have factories here that produce steel and stainless and aluminum
[21:35:00] <zeeshan> so most metal is stocked
[21:35:08] <zeeshan> i was just wondering if it was any different down there :)
[21:35:21] <zeeshan> cause a lot of machinist guys seem to order metal from onlinemetals.com (on youtube)
[21:35:34] <zeeshan> which is 2.5x the price of what i pay locally
[21:35:46] <PetefromTn_andro> I figured maybe it was Connor ordered a couple tons to cut on his 0704 LOL
[21:35:48] <zeeshan> er 3.5x time by the time you account for shipping
[21:35:54] <zeeshan> PetefromTn_andro: rofl
[21:35:55] <zeeshan> prolly
[21:36:26] <PetefromTn_andro> ;)
[21:37:03] <PetefromTn_andro> I don't get great prices really due to the low amounts I buy generally
[21:37:32] <PetefromTn_andro> This stuff was like a tad less than nine bucks a foot .
[21:37:59] <zeeshan> thats not bad
[21:38:05] <zeeshan> online metals has it for 12.73 a foot
[21:38:19] <zeeshan> local place has it for 6.75 per foot
[21:38:31] <PetefromTn_andro> I checked onlinemetals and the same stuff is like twelve bucks or so I think plus shipping.
[21:38:55] <PetefromTn_andro> Yup
[21:39:44] <PetefromTn_andro> I'm good with the price it is a very small part of the cost for what I am getting for these parts.
[21:40:19] <PetefromTn_andro> Always liked to make more of course but until I start making a lot of parts this works for me.
[21:40:38] <zeeshan> have you got a lot of orders
[21:40:39] <zeeshan> for em?
[21:41:48] <PetefromTn_andro> Nah not a lot really but lately it has picked up a bunch. I gotta make several tomorrow morning that are already spoken for.
[21:42:38] <PetefromTn_andro> I am gonna make a small batch and pop em on the bay and see what happens.
[21:43:24] <PetefromTn_andro> The new one if it looks nice I will probably be making a bunch of those from the requests I have been getting for it.
[21:43:59] <jdh> you can always get 10% off onlinemetals. Usually 20%
[21:44:56] <PetefromTn_andro> I swear the design work is by far the hardest part of this for me. It takes me a good while to come up with a working model that I like and that I think looks nice
[21:44:58] <PetefromTn_andro> How
[21:45:19] <jdh> 10% on tuesday, or if > $100, or if they send you a special.
[21:45:40] <jdh> If you put stuff in your shopping cart and leave it for a day or two, they send you a reminder with a %% off
[21:45:52] <jdh> They send me 20% codes
[21:45:55] <PetefromTn_andro> I must be doing at least something right I have got orders from folks even in European countries somehow LOL
[21:46:11] <zeeshan> PetefromTn_andro: lol nice
[21:46:21] <PetefromTn_andro> Damn nice man thanks for the tip
[21:46:37] <jdh> no local vendors here. they are convenient if nothing else
[21:47:29] <PetefromTn_andro> I am hoping that between the stuff I design and build and the stuff from the race shop I am doings will keep me busy.
[21:47:32] <zeeshan> jdh
[21:47:34] <zeeshan> youre not in florida are you
[21:47:40] <jdh> nope :(
[21:47:43] <zeeshan> where are you
[21:47:47] <jdh> .nc.us
[21:48:15] <jdh> 25% off online orders* $100 or more!
[21:48:18] <zeeshan> i take all these local supplies for granted
[21:48:24] <PetefromTn_andro> This place I go to is like maybe twenty minute from my house.
[21:48:43] <zeeshan> i have 6 different metal suppliers within a 15 mile radius
[21:48:44] <jdh> zeeshan: I have the ocean
[21:48:48] <zeeshan> thats true
[21:48:49] <zeeshan> :(
[21:48:55] <zeeshan> i have a dirty lake..
[21:48:56] <jdh> you have 'winter'
[21:49:08] <zeeshan> where turds seem to float around
[21:49:08] <zeeshan> :D
[21:49:37] <PetefromTn_andro> I will have the damn ocean too just as soon as I sell my damn house grrr
[21:49:54] <zeeshan> https://scontent-a-ord.xx.fbcdn.net/hphotos-xfp1/t31.0-8/257659_10152078625875858_1135294630_o.jpg
[21:49:57] <zeeshan> do you have that? :D
[21:50:19] <zeeshan> i was literally 1 step from death there
[21:50:20] <jdh> nice view. I'll take mine.
[21:51:07] <jdh> http://tinyurl.com/mt2xtf9
[21:51:16] <zeeshan> pretty :D
[21:51:20] <zeeshan> my pic btw was a lie
[21:51:23] <zeeshan> that was in newfoundland
[21:51:27] <zeeshan> 1800 miles away
[21:51:30] <zeeshan> when i was visting my dad
[21:51:32] <jdh> no screech here
[21:51:33] <PetefromTn_andro> There's places like that not far from here.
[21:51:37] <zeeshan> it was aug 21..
[21:51:50] <jdh> and freezing?
[21:51:50] <zeeshan> and 48F
[21:51:51] <zeeshan> ..
[21:51:59] <zeeshan> mainly next to the water
[21:52:03] <zeeshan> by land it was around 80F
[21:52:06] <zeeshan> its a huge difference.
[21:52:13] <jdh> it gets to 48 here too...in Feb.
[21:52:44] <zeeshan> https://scontent-b-ord.xx.fbcdn.net/hphotos-xfa1/v/t1.0-9/s720x720/428948_10151962171760858_422960312_n.jpg?oh=80451089b279dfdbbb261e60eeac9020&oe=5481A0AF
[21:52:50] <zeeshan> that same cliff
[21:52:54] <zeeshan> imaging falling down there
[21:53:06] <zeeshan> size perspective, each of those boulders are about as big as a car
[21:53:19] <zeeshan> i really suck at taking photos
[21:53:24] <zeeshan> it's really hard to capture size perspective..
[21:54:08] <PetefromTn_andro> Trying to figure out how to transfer files via Bluetooth with my wifes phone.
[21:54:29] <jdh> sendto, bt, phone
[21:54:44] <zeeshan> man
[21:54:46] <PetefromTn_andro> They paired up but I want to send an album to it won't seem to do it.
[21:54:48] <zeeshan> im planning a drive next year
[21:55:35] <jdh> I'm planning a drive in teh morning.
[21:55:43] <jdh> conf. call at 7:30 :(
[21:55:43] <zeeshan> thats going to be 3500 miles
[21:55:45] <zeeshan> one way :[
[21:56:07] <zeeshan> https://www.google.com/maps/dir/Mt+Hope,+Hamilton,+ON,+Canada/Whitehorse,+YT,+Canada/@53.9530777,-113.6802263,5z/data=!4m29!4m28!1m20!1m1!1s0x882c902dd8c6946d:0x4694566cb6c75458!2m2!1d-79.9152937!2d43.1548177!3m4!1m2!1d-80.7524452!2d46.1979409!3s0x4d2eebbc7f101b13:0xfda1f909c1a8b4de!3m4!1m2!1d-87.897955!2d48.9403563!3s0x4d5c8a0207a6d7b9:0x103969000a5a5163!3m4!1m2!1d-125.0944955!2d54.0855919!3s0x53
[21:56:12] <jdh> $800 in gas for my car
[21:56:15] <PetefromTn_andro> Take the rx7 LOL
[21:56:19] <zeeshan> hahaha PetefromTn_andro
[21:56:37] <zeeshan> rx7 gets 200 miles per tank
[21:56:51] <zeeshan> each tank is 18.5 gallons
[21:56:55] <zeeshan> tank fill
[21:57:08] <zeeshan> 35 tank files.
[21:57:17] <PetefromTn_andro> I got to drive one of their tuner cars the other day . Nice car. It sure is tight inside those things tho.
[21:57:19] <jdh> why do you want to go there?
[21:57:26] <zeeshan> $3500 in gas
[21:57:27] <zeeshan> rofl
[21:57:40] <jdh> why does anyone want to go there much less live there.
[21:57:44] <zeeshan> jdh cause its an epic drive
[21:57:47] <zeeshan> gorgeous
[21:58:13] <jdh> leave the car and fly home?
[21:58:22] <zeeshan> no
[21:58:28] <zeeshan> drive back using another route
[21:58:33] <CaptHindsight> wow 20 hours by plane since there's no direct flight
[21:58:46] <zeeshan> with a plane, you dont capture the beauty
[21:58:57] <zeeshan> or experience the local food
[21:59:33] <jdh> why not go to fairbanks while you are driving
[21:59:37] <PetefromTn_andro> Yeah deep fried beaver LOL
[21:59:39] <zeeshan> jdh might cross over
[21:59:40] <zeeshan> https://www.google.com/maps/dir/Mt+Hope,+Hamilton,+ON,+Canada/St+Anthony,+NL,+Canada/@46.7353832,-72.1488167,6z/data=!3m1!4b1!4m13!4m12!1m5!1m1!1s0x882c902dd8c6946d:0x4694566cb6c75458!2m2!1d-79.9152937!2d43.1548177!1m5!1m1!1s0x4b83e7d728c9edb3:0xb8ffe6caf69d9d3d!2m2!1d-55.5958649!2d51.3704156
[21:59:45] <zeeshan> this is the drive i did last year
[21:59:57] <zeeshan> i had some of the most amazing food i've ever had
[22:00:06] <jdh> seal flipper pie?
[22:00:08] <CaptHindsight> thats about the flight path to Japan, Korea, China etc, you do get quite a view from the belly cam
[22:00:08] <zeeshan> haha
[22:00:12] <zeeshan> i did have moose burgers
[22:00:23] <zeeshan> the 8 hour ferry ride in between was awesome too
[22:00:35] <jdh> I know a couple of newfies
[22:00:43] <zeeshan> jdh they're not too smart
[22:00:44] <PetefromTn_andro> Lol
[22:00:50] <zeeshan> but they're very accomodating and hospital
[22:01:11] <Tecan> unless they want your job
[22:01:25] <Tecan> then its like a gang effort lol
[22:02:10] <jdh> the ones I know are quite smart
[22:02:10] <zeeshan> https://fbcdn-sphotos-g-a.akamaihd.net/hphotos-ak-xaf1/t1.0-9/599580_10151949442890858_2068258619_n.jpg
[22:02:11] <zeeshan> last pic
[22:02:18] <zeeshan> i wanted to take that pic so bad
[22:02:18] <zeeshan> lol
[22:02:24] <zeeshan> we frigging had wireless internet on the ferry
[22:02:59] <skunkworks_> https://groups.yahoo.com/neo/groups/mach1mach2cnc/conversations/messages/145348
[22:04:22] <CaptHindsight> zeeshan: 176 km in 8 hours by ferry?
[22:04:54] <zeeshan> yea its slow
[22:05:00] <zeeshan> but see we got there at 10 pm or something like that
[22:05:02] <zeeshan> so we just slept on the ferry
[22:05:10] <zeeshan> it was a 22 hour drive to get to the port
[22:05:21] <zeeshan> and we were exhausted, cause we drove constantly
[22:05:25] <PetefromTn_andro> You love busting mach.3. chops huh Lol
[22:05:42] <zeeshan> brian barker?
[22:05:44] <zeeshan> the gameshow host?
[22:05:48] <zeeshan> er that bob barker
[22:06:38] <PetefromTn_andro> Bring it on Bob Lol
[22:06:44] <zeeshan> mach 4 looks like a windows version
[22:06:45] <zeeshan> of linuxcnc
[22:06:49] <zeeshan> literally copied over
[22:06:51] <jdh> exhausted constant driving sounds dangerous
[22:06:57] <zeeshan> jdh no
[22:06:57] <jdh> and not conducive to seeing the beauty.
[22:07:00] <zeeshan> we had 3 drivers
[22:07:04] <PetefromTn_andro> Shades of Happy Gilmore
[22:07:09] <zeeshan> we wanted to spend most of our time in newfoundland
[22:07:14] <zeeshan> not the areas we already have been to
[22:07:22] <zeeshan> we slowed down in newfoundland
[22:07:47] <zeeshan> http://www.google.ca/url?sa=i&source=images&cd=&cad=rja&uact=8&docid=L7Blac32Owa9KM&tbnid=4yqFtHAN-wvsmM:&ved=0CAgQjRw&url=http%3A%2F%2Ftravel.nationalgeographic.com%2Ftravel%2Fparks%2Fgros-morne-canada-park%2F&ei=GtLqU--4MJW2yATqrILAAQ&psig=AFQjCNG6dkGoAK7QI5DdSy54bIOP-k_qiw&ust=1407984538939461
[22:07:50] <zeeshan> stopped by that park
[22:07:54] <zeeshan> http://images.nationalgeographic.com/wpf/media-live/photos/000/367/cache/western-brook-pond-gros-morne_36749_600x450.jpg
[22:07:57] <zeeshan> sorry for the prev link
[22:08:44] <PetefromTn_andro> Well nite guys talk tomorrow
[22:08:58] <zeeshan> gnite PetefromTn_andro
[22:09:01] <zeeshan> i hope you sell lots!
[22:09:17] <zeeshan> i want to see your business run =)
[22:09:23] <PetefromTn_andro> Lol yeah buddy me too.
[22:10:06] <PetefromTn_andro> Hell I'd be happy just to keep busy and make a few bucks
[22:10:10] <PetefromTn_andro> Gn8
[22:13:41] <CaptHindsight> zeeshan: can you drive farther much north into NL?
[22:14:54] <zeeshan> CaptHindsight: that is the north most point
[22:15:01] <zeeshan> well i guess its not
[22:15:06] <zeeshan> you can go 15 km more north
[22:15:12] <zeeshan> theres some viking village there
[22:16:02] <CaptHindsight> looks like only one road across the bay to the north
[22:16:21] <CaptHindsight> 510
[22:16:56] <zeeshan> CaptHindsight:
[22:17:09] <zeeshan> "l'anse aux meadows natural historic site'
[22:17:24] <zeeshan> we saw icebergs...
[22:17:29] <zeeshan> there was a polarbear chilling on one
[22:17:29] <zeeshan> lol
[22:18:02] <zeeshan> i laugh cause those things make me wonder..
[22:18:17] <zeeshan> why would you decide to float away randomly
[22:18:21] <zeeshan> without any control
[22:21:10] <ChuangTzu_> they can swim...
[22:21:22] <zeeshan> yea
[22:21:24] <zeeshan> but they're no whale
[22:21:27] <zeeshan> they're not gonna swim for hours
[22:21:37] <zeeshan> from what i've heard
[22:21:56] <zeeshan> they'll swim to land
[22:22:03] <zeeshan> and then cause havoc on the communities
[22:22:21] <zeeshan> they float down from greeland
[22:22:51] <zeeshan> nsfw
[22:22:52] <zeeshan> http://www.arcticphoto.co.uk/Pix/QQ/80/QQ.0093-18_P.JPG
[22:22:55] <zeeshan> thats what ends up happening to them
[22:22:58] <zeeshan> .. =/
[22:24:53] <ChuangTzu_> yummy
[22:33:00] <zeeshan> i really need to get rid of some of this stuff
[22:33:01] <zeeshan> http://i.imgur.com/cEKrH7C.jpg
[22:33:02] <zeeshan> =/
[22:43:08] <XXCoder1> is that.. spidles?
[22:43:10] <XXCoder1> why so many?
[22:43:19] <XXCoder1> I see maybe 5?
[22:57:50] <XXCoder1> zeeshan:
[23:01:24] <XXCoder1> damn http://www.ebay.com/itm/ROCHESTER-4-x-8-CNC-MILL-/150453948065?pt=US_Heavy_Equipment&hash=item2307c10ea1
[23:01:30] <XXCoder1> way too big for me lol
[23:45:14] <zeeshan> haha nice XXCoder1
[23:45:28] <XXCoder1> yeah and too much cnc for me LOL
[23:45:35] <zeeshan> me too
[23:45:42] <zeeshan> unless you're planning to cnc some car chassis
[23:45:43] <zeeshan> :D
[23:45:53] <XXCoder1> would have to get few walls down at home and probably still not fit. I rent place so.. no. lol
[23:47:36] <zeeshan> haha
[23:47:43] <zeeshan> that machine costs more than a house
[23:48:04] <XXCoder1> lol get it, build a house around it, probably cheaper ;0
[23:48:38] <zeeshan> sigh
[23:48:53] <zeeshan> im a TA for an undergraduate lab this upcoming term
[23:48:59] <zeeshan> they put a code "M3"
[23:49:04] <zeeshan> i have no idea what lab it is..
[23:49:07] <zeeshan> i requested metal forming
[23:49:13] <zeeshan> cause thats my expertise
[23:54:58] <XXCoder1> hmm lets see what happens heh
[23:55:43] <zeeshan> i'm pretty sure its metal forming
[23:55:52] <zeeshan> like if they put me in the lab "drag on spheres"
[23:55:57] <zeeshan> which is compeltely fluid mechanics
[23:56:05] <zeeshan> i'd have to really review stuff
[23:56:20] <zeeshan> i wanna be the COOLEST lab TA!
[23:56:32] <XXCoder1> :)
[23:56:37] <XXCoder1> hm random thought
[23:57:04] <XXCoder1> wonder if possible to make very close to perfect sphere by air pressure and certain shaped metal form
[23:57:16] <zeeshan> lol
[23:57:22] <zeeshan> you're going to find this funny.
[23:57:27] <zeeshan> i still remember it to this day
[23:57:33] <zeeshan> my final exam question for heat transfer was.....
[23:57:57] <zeeshan> using an acoustic levitation device
[23:58:26] <zeeshan> molten metal would drop into the device
[23:58:38] <zeeshan> and acoustic levitation would shape it into a sphere..
[23:58:42] <zeeshan> a perfect sphere
[23:58:51] <zeeshan> we were to calculate the cooling time
[23:59:04] <zeeshan> accounting for radiation, natural convection, etc
[23:59:24] <zeeshan> i thought it was some 'bs' question
[23:59:32] <zeeshan> but the device exists!