#linuxcnc | Logs for 2013-01-16

[01:33:40] <zultron> Not sure, I can't afford a CPU to make that calculation.
[01:58:41] <DJ9DJ> moin
[03:44:55] <mrsun> rigidity rigidity rigidity
[03:45:13] <DJ9DJ> riggly diggly!
[04:19:08] <Loetmichel> mornin'
[06:21:29] <mrsun> hmm mill table is rocking when i switch direction also :/
[06:21:36] <mrsun> about 0.03mm at the far end of the travel
[06:21:59] <mrsun> if i turn it throws the table 0.03 in one direction
[07:29:54] <jthornton> yuck
[09:01:43] <mazafaka> http://mazafaka.posterous.com/thanks-to-previous-job-from-where-i-originate
[09:03:56] <mazafaka> need to add couple of videos and go go the seminar of young specialists with that thing that thing of which I had been asking.
[09:04:46] <mazafaka> http://getfile2.posterous.com/getfile/files.posterous.com/temp-2013-01-16/vzrlwpEygihEodgnJdyAritqBmnEuxfGIGeofaAhyFnousmlwuAuDjgcIbos/SAM_0635.JPG.scaled1000.jpg
[10:22:51] <mrsun> hmm when checking table on a mill, should i realy do it at the far ends of it? :P shouldnt the ends of the place where the table sits be nough ...
[10:22:58] <mrsun> i might be overdoing it like hell ? :P
[11:39:56] <Loetmichel> re @ home
[11:40:12] <jdh> @ work
[11:54:47] <Connor> @ work/home :)
[11:57:49] <IchGuckLive> hi holgi B)
[11:58:01] <IchGuckLive> liegt schnee
[11:58:20] <pcw_home> light snow?
[11:59:15] <IchGuckLive> its snowing here pcw_home
[11:59:53] <pcw_home> just cold (for California bay area) here
[12:00:22] <Holgi> Ja, hier liegen 10 cm
[12:00:48] <pcw_home> been about 0C most mornings for the last week or so here
[12:08:07] <IchGuckLive> tjb1: ? are you online
[12:08:14] <IchGuckLive> pcw_home: by the way
[12:08:24] <IchGuckLive> will you make a THC for the parport
[12:08:39] <IchGuckLive> so only trigger up down
[12:08:57] <IchGuckLive> easyplasma has one for 300USD
[12:09:20] <IchGuckLive> that is compared to your one nasty expensiv
[12:09:41] <pcw_home> You can use the THCAD on a parallel port
[12:10:11] <IchGuckLive> howmany pins
[12:10:45] <pcw_home> 1
[12:11:02] <IchGuckLive> isent it a Quad signal
[12:11:15] <pcw_home> no just a rate
[12:11:20] <IchGuckLive> so PWM in
[12:11:54] <pcw_home> Not PWM, variable frequency square wave
[12:12:11] <IchGuckLive> like in model servos
[12:12:25] <IchGuckLive> 0.5-2ms at 20ms signal wide
[12:12:51] <pcw_home> No its variable frequency (10-1 range)
[12:13:19] <IchGuckLive> did you provide a example towards hal connect
[12:13:50] <IchGuckLive> i will ask retrofit if he can supply it in Austria
[12:14:06] <pcw_home> limitation with software counting is that you need to low-pass filter the result so the control bandwidth is limited to say 50 Hz
[12:14:47] <IchGuckLive> therfor it woudt be good to get a up down signal
[12:15:35] <pcw_home> Not really I think its much nicer for LinuxCNC to read the voltage and have all the control in LinuxCNC
[12:15:57] <IchGuckLive> ok
[12:16:18] <pcw_home> theres a component for this
[12:16:27] <IchGuckLive> is in the manual a drawing for NOOBs like me to get the lowoas done
[12:16:42] <pcw_home> JTs THC comp
[12:16:50] <IchGuckLive> if seen this
[12:17:01] <pcw_home> No but lowpass is pretty simple
[12:18:07] <IchGuckLive> for people like you im a LED solderer
[12:18:23] <IchGuckLive> if it is not on turn 180deg
[12:18:58] <pcw_home> well it only has 3 pins...
[12:19:20] <pcw_home> not much worse than a LED :-)
[12:19:27] <IchGuckLive> B)
[12:19:47] <IchGuckLive> i wil usk JT for a Drawing of it
[12:20:06] <IchGuckLive> no eagle needed but a shematic woudt be great
[12:22:54] <pcw_home> how fast is your base thread normally? (that will determine what resolution you get vs sample time)
[12:23:06] <IchGuckLive> 15k
[12:23:32] <IchGuckLive> jt requests 2pins for the thc.comp
[12:23:38] <pcw_home> 15 usec = 66 KHz?
[12:23:49] <IchGuckLive> i guess
[12:25:32] <pcw_home> so roughly 6 bits/ms resolution
[12:26:01] <pcw_home> so 10 bits will take 16 ms
[12:26:30] <IchGuckLive> good enoph
[12:27:18] <pcw_home> so ~1/3 V resolution at 16 ms update rate 1.2V at 4 ms
[12:28:03] <pcw_home> probably fast enough for z axis unless you are cutting thin corrugated stock
[12:28:20] <pcw_home> cross grain
[12:30:00] <IchGuckLive> i will see how tjb1 did it he got a new P45 plasma to work
[12:31:17] <pcw_home> He has a THCAD and using a parallel port so should be a good example of how this works out
[12:31:57] <IchGuckLive> agree i wil lget it to run overssees as well O.O
[13:13:57] <ReadError> mmm this locline stuff is pretty nice
[13:19:59] <IchGuckLive> ReadError: http://www.youtube.com/watch?v=35tHYaDUmZQ
[13:20:58] <IchGuckLive> tjb1: ?
[13:27:13] <ReadError> thats awesome
[13:31:09] <IchGuckLive> as big as you can go B)
[13:31:15] <IchGuckLive> ok im off By
[13:36:04] <kwallace1> This one is still available: http://www.ebay.com/itm/320974456467
[13:36:51] <cradek> Ships to: Local pick-up only
[13:37:03] <cradek> that is an understatement.
[13:38:01] <AR__> i messaged and said i only accept USPS priority shipment
[13:38:29] <AR__> if they can disassemble and ship in flat rate boxes i will purchase
[13:39:45] <Connor> cradek: I can see why it's still available.. It's freaking huge and they're asking allot for it.
[13:40:10] <AR__> that is not a bad price
[13:40:18] <cradek> if it runs or almost runs, it's cheap
[13:40:33] <cradek> needing it, moving it, and having a place for it are the hard parts I bet. not the price.
[13:40:58] <Connor> The control system looks ancient.
[13:41:20] <cradek> sure, probably needs a linuxcnc retrofit
[13:41:50] <AR__> i ask if i can use my 160oz-in steppers
[13:41:59] <Connor> How old is that thing you think ?
[13:42:22] <cradek> 1975-1980
[13:42:32] <Connor> SN has 79 in it.. I bet that's it.
[13:43:12] <AR__> it is not very old
[13:43:15] <AR__> i have a similar one
[13:43:42] <Connor> 34 years
[13:44:29] <tjb1> What did IchGuckLive need?
[13:58:34] <JT-Shop> YIPPIE! the 308 tool changer is back alive :)
[13:58:57] <JT-Shop> he wanted to know how you hooked up the THCAD card I think
[14:41:23] <ReadError> tjb1: get the printer kit yet?
[14:52:05] <tjb1> No
[14:52:52] <tjb1> I haven't hooked the thc a-d up yet
[15:59:15] <Mr_Wolfsl> Hi anyone know how can I keep axis A C in the .var with the software
[16:12:39] <DJ9DJ> gn8
[16:44:18] <tjb1> ReadError: My printer should ship tuesday they said
[17:08:26] <JT-Shop> printer?
[17:10:13] <ReadError> 3d printer
[17:10:29] <Tom_itx> which one did you get?
[17:10:36] <ReadError> oh ive had one, prusa2
[17:10:47] <ReadError> but tjb just ordered a makergear one
[17:11:07] <Tom_itx> is that the one everyone is shunning?
[17:14:33] <ReadError> nah its a prusa2
[17:14:41] <ReadError> makerbot is what you are thinking of
[18:22:26] <JT-Shop> Tom_itx: what size cylinder did you use?
[18:58:51] <Tom_itx> JT-Shop, iirc it was 3"
[18:58:58] <Tom_itx> 3 x 24
[18:59:15] <Tom_itx> pretty sure it wasn't 4
[18:59:29] <Tom_itx> 2 stage pump
[19:02:55] <Tom_itx> http://tsc.tractorsupply.com/search#?w=hydraulic+cylinder&searchButton.x=0&searchButton.y=0&sliredirect=1
[19:06:43] <Tom_itx> you got me wondering now.. i'm gonna see if i still have a pic of it
[19:15:22] <r00t4rd3d> http://filabot.com/reclaimer.php
[19:17:02] <r00t4rd3d> that would be ideal for any douche bag with a 3d printer :D
[19:18:04] <r00t4rd3d> i guess they are shipping those to the kickstarter supporters
[19:20:18] <ReadError> eh
[19:20:23] <ReadError> too much effort
[19:20:29] <ReadError> i use the best PLA
[19:21:29] <r00t4rd3d> i wanted a 3d printer before a cnc router
[19:21:46] <r00t4rd3d> cheaper for a router though
[19:21:57] <ReadError> im about to buy/build a router
[19:22:04] <ReadError> 24x48"
[19:22:33] <r00t4rd3d> ill build it
[19:22:36] <r00t4rd3d> 1k
[19:22:37] <jdh> I want to cnc a lathe
[19:22:48] <ReadError> yea, i dont want wood on it :)
[19:22:49] <jdh> even though I think cnc lathes are probably the least useful thing for me.
[19:22:57] <ReadError> maybe just the spoil board
[19:23:24] <r00t4rd3d> a good part of my machine is aluminum
[19:23:39] <ReadError> updated pics?
[19:23:44] <r00t4rd3d> no
[19:23:47] <ReadError> well see im torn right
[19:23:58] <ReadError> rack&pinion vs. screws
[19:24:26] <r00t4rd3d> i would use all cnc router parts parts
[19:24:33] <ReadError> yea
[19:24:38] <ReadError> i was lookin at their kit
[19:25:26] <r00t4rd3d> super easy
[19:25:41] <ReadError> dont talk about my mom like that
[19:27:15] <alex4nder> ReadError: did you see the A2Z sale on taig lathe pieces?
[19:27:20] <r00t4rd3d> http://www.cncrouterparts.com/gantry-riser-set-p-131.html
[19:27:25] <r00t4rd3d> i want a set of those
[19:27:35] <r00t4rd3d> and 4 extended carriages.
[19:28:18] <ReadError> alex4nder: nah anything worth while?
[19:32:54] <alex4nder> ReadError: yes, the taig lathes
[19:34:18] <ReadError> i got one for xmas
[19:36:24] <r00t4rd3d> the first thing he made was a rather large black dildo
[19:36:38] <ReadError> why would i do that on a lathe?
[19:36:39] <ReadError> ;p
[19:37:05] <r00t4rd3d> so you can rib it, duh....
[19:38:12] <alex4nder> ReadError: oh awesome
[19:39:17] <ReadError> yea using a lathe is harder than I expected
[19:39:20] <ReadError> but im getting it down
[20:26:30] <tjb1> ReadError: did you get the message
[20:26:46] <tjb1> r00t4rd3d: you can put the brushes on those
[20:33:51] <Tom_itx> i forgot who's building the quad?
[20:34:57] <Tom_itx> http://www2.electronicproducts.com/Dancing_drones_are_controlled_by_mobile_device_app-article-FAJB_CES_Parrot_Jan2013-html.aspx
[20:36:23] <ReadError> message bout what?
[20:36:32] <ReadError> Tom_itx, me
[21:35:01] <ReadError> http://dl.dropbox.com/u/25091878/Photo%20Jan%2016%2C%2010%2020%2000%20PM.jpg
[21:35:04] <ReadError> dont mind the mess
[21:35:13] <ReadError> got my vac setup ;)
[21:35:53] <ReadError> aww man its sideways for me
[21:36:17] <Tom_itx> no kidding
[21:36:41] <ReadError> yea i been in work mode not cleaning mode
[21:37:00] <Tom_itx> no mist lube?
[21:37:10] <ReadError> nah i would make even more mess with that
[21:37:18] <Tom_itx> hard on bits
[21:37:39] <ReadError> these are only 3$ each
[21:37:48] <ReadError> if i had nicer stuff i would probably
[21:38:06] <Tom_itx> learn good habits no matter what
[21:38:30] <ReadError> does a mist lube require a spraying setup?
[21:38:37] <ReadError> or just a spray bottle
[21:40:03] <Tom_itx> you can do it either way
[21:40:18] <Tom_itx> the good ones use an air compressor and a reservoir
[21:40:20] <ReadError> well, i noticed when i put a lube on it, the chips want to gunk up and stick around
[21:40:35] <r00t4rd3d> mill me a qc
[21:40:35] <ReadError> where was just the vacuum pulls them all away
[21:40:50] <ReadError> a wut?
[21:40:57] <r00t4rd3d> quadcopter
[21:41:18] <r00t4rd3d> send me your dxfs for that recent one
[21:41:20] <ReadError> http://dl.dropbox.com/u/25091878/Photo%20Jan%2015%2C%209%2054%2057%20PM.jpg
[21:41:24] <ReadError> you seen that one?
[21:41:37] <r00t4rd3d> ya that one
[21:41:47] <ReadError> i got full blown gcode if you want that
[21:41:54] <ReadError> its for 1/8" endmill tho
[21:42:21] <r00t4rd3d> i have those but i would probably do it wood
[21:42:33] <jdh> how would spruce or something work for that?
[21:42:44] <ReadError> i seen plenty of folks use aluminum on routers r00t4rd3d
[21:42:54] <ReadError> jdh, not sure, i dont know much about woods/strengths
[21:43:04] <ReadError> but wood would work i think
[21:43:14] <r00t4rd3d> lots of people use wood
[21:43:38] <ReadError> you making jabs at my mom again?
[21:44:29] <Tom_itx> what did you use to generate the gcode?
[21:44:31] <r00t4rd3d> most kits are laser but plywood
[21:44:38] <r00t4rd3d> cut*
[21:44:49] <ReadError> Tom_itx, HSMXpress
[21:44:50] <ReadError> its free
[21:44:53] <ReadError> pretty decent too
[21:45:03] <Tom_itx> do you start with a solid model or what?
[21:45:29] <ReadError> yup
[21:45:38] <jdh> free + solidworks?
[21:45:39] <ReadError> its built in so if i change the model, the code adapts
[21:45:41] <Tom_itx> solidworks add on?
[21:45:43] <ReadError> yea
[21:45:47] <ReadError> its completely free though
[21:45:51] <Tom_itx> what ver will it work with?
[21:45:59] <ReadError> 2009-2012 i think
[21:46:03] <Tom_itx> crap
[21:46:11] <jdh> except SW is far from free!
[21:46:32] <r00t4rd3d> borrow a boat
[21:47:09] <Tom_itx> ahh.. limited to 2.5d
[21:47:18] <Tom_itx> no 3d surfaces
[21:47:36] <ReadError> yea ;/
[21:47:37] <Tom_itx> mine'll do surfaces
[21:47:41] <ReadError> thats how they get you
[21:47:44] <ReadError> what do you use Tom_itx ?
[21:47:53] <Tom_itx> an old ver of smartcam
[21:47:55] <r00t4rd3d> if i had the dimensions I could make that in Aspire in minutes
[21:48:04] <ReadError> oh i use visual mill also
[21:48:08] <jdh> export it as a dxf
[21:48:08] <ReadError> its pretty decent as well
[21:48:25] <ReadError> i can when i get back upstairs
[21:48:29] <ReadError> babysitting the mill
[21:48:44] <ReadError> i suspect all this airflow will keep things cool as well
[21:48:51] <ReadError> theres tons of air going around the endmill
[21:48:55] <Tom_itx> how does it handle pockets etc?
[21:49:10] <jdh> does air really cool well?
[21:49:42] <ReadError> Tom_itx, worked good on the last one
[21:49:57] <ReadError> i should get my IR gun and see what the temp difference is
[21:50:34] <Tom_itx> how much is solidworks now?
[21:51:15] <ReadError> no idea tbh
[21:51:23] <ReadError> i hate the scam they have going
[21:57:12] <ReadError> i figure after a few more mcmaster orders i will never need to buy ziplock bags again
[22:01:22] <jdh> they don't last
[22:03:01] <Tom_itx> for what?
[22:03:05] <t12> whats the solidworks scam?
[22:11:00] <jdh> the price
[22:16:03] <t12> its pretty difficult software to engineer
[22:26:23] <jdh> sure
[22:33:18] <thrile> I have a problem. I have a machine with a maximum A and V. I need it to reach a specific point X at a specific time (t). It can do so only by applying a fixed acceleration (a) for tb seconds, and then applying -a for tb seconds before stopping. Thus, I can control its position only by messing with the acceleration. Here's a reverse run, I can't figure out the formulas. https://docs.google.com/file/d/0B9B78Ofn6Af3c0dkU3VKUW11Vmc/edi
[22:33:45] <thrile> (I'm interested in the math behind figuring out discrete X points, and the blending time start position, in theory)
[22:49:38] <pcw_home> stopped at beginning and end?
[22:50:13] <jdh> hsmworks/hsmexpress are owned by Autodesk... but it's for solidworks only.
[22:51:01] <thrile> yeah, no blending between motions, I'll do that later.
[22:51:11] <thrile> for now I just want to understand the math behind a simple trapezoidal motion.
[22:52:18] <pcw_home> P = 1/2at^2 so A= 2P/T^2 (for first 1/2 of trip)
[22:58:03] <thrile> hmm
[22:58:09] <thrile> that seems about right
[22:58:24] <thrile> it graphs ok in mathematica, so, yeah...
[22:58:54] <thrile> but how do I know where's my transition point? (the ones between 0 and constant acceleration)
[23:10:36] <pcw_home> for trapezoidal you need to have the maxvel specified (and then break the trajectory into 3 pieces: ramp-up (to maxvel), slew(at maxvel) , ramp-down)
[23:13:13] <tjb1> ReadError: r00t4rd3d is scared to cut aluminum
[23:13:20] <tjb1> all he cuts are paradise boxes :P
[23:14:08] <ReadError> lol
[23:15:36] <toastyde1th> aluminum cuts pretty easily
[23:15:56] <toastyde1th> HUNDRED AND TWENTY INCHES A MINUTE
[23:16:01] <toastyde1th> baller statusssss
[23:18:15] <thrile> yeah, knowing maxvel of course.
[23:19:19] <thrile> also, what makes the X snap exactly to t (at least mathematically)? is a different value of a used sometimes? or is the maxvel altered in some way?
[23:19:30] <toastyde1th> at my old college i used to cut aluminum with a 4" facemill at 80-100 ipm because it was so loud
[23:19:45] <toastyde1th> people would come out of classes to watch
[23:20:25] <toastyde1th> 6000 rpm, 100 ipm, and .150 deep
[23:20:27] <ReadError> cut super clean ?
[23:20:48] <toastyde1th> the facemill was fucked up so it never cut clean
[23:21:09] <toastyde1th> the teeth pockets were all banged up and filed back down so the teeth were all at different heights
[23:21:34] <toastyde1th> but it would have been pretty shiny if i used a flycutter or a non-retarded facemill
[23:21:42] <toastyde1th> or maybe a wiper insert
[23:37:13] <ReadError> t12
[23:37:16] <ReadError> the scam bing
[23:37:17] <ReadError> being*
[23:37:26] <ReadError> if i make something in SW2012
[23:37:30] <ReadError> and send it to you
[23:37:34] <ReadError> and you have SW2011
[23:37:37] <ReadError> it wont work
[23:37:56] <ReadError> so if you want this contract, you need to upgrade/pay more
[23:40:54] <ReadError> https://dl.dropbox.com/u/25091878/Photo%20Jan%2016%2C%2011%2026%2005%20PM.jpg
[23:40:58] <ReadError> almost done!
[23:41:04] <ReadError> just gotta mount the electronics