#emc | Logs for 2005-09-15

[00:11:38] <Jacky^> umpf..
[00:12:12] <Jacky^> i just finish to draw the schematic of optoisolators circuit
[00:12:44] <Jacky^> can anyone take a look to the schematic and tell me if it will burn or not ? :\
[00:12:59] <Jacky^> http://www.locrinformatica.it/jack/6n137.jpg
[00:15:59] <Jacky^> if ok, I could start buidling the pcb ..
[00:21:56] <AchiestDragon> well r1 to r6 are wired wrong
[00:22:17] <paul_c> Jacky^: The 390R resistors - I'd be inclined to use 1K
[00:22:50] <Jacky^> ok, i can change it with 1k, np
[00:22:59] <paul_c> & R13-15
[00:23:27] <Jacky^> ok
[00:23:29] <AchiestDragon> the side that connects to the 5v on r1 to r6 should go to the parallel port pin , and not the other side , you dont want to connect 5v to those resitors
[00:23:45] <paul_c> No...
[00:23:45] <Jacky^> looking..
[00:24:16] <paul_c> Take pin 3 of each 6N137 to the Parport pin
[00:24:38] <paul_c> the parport can sink more than it can source
[00:25:37] <AchiestDragon> with a 470r connected to 5v a change in the input from the parallel port wont change the output of the opto isolator as it will be (always on ) or overload the driver on the parallel port
[00:26:41] <Jacky^> i just looked at the datasheet :(
[00:27:24] <Jacky^> in the example application they was using 470 ohm resistor..
[00:27:46] <AchiestDragon> yes 470 is right for an led
[00:27:53] <Jacky^> oh ..
[00:28:09] <AchiestDragon> but the way you have them wired will keep the led on all the time
[00:28:27] <AchiestDragon> ok
[00:29:04] <Jacky^> should be ok
[00:29:41] <Jacky^> i will replace the 470 hom resistor with 1k
[00:29:57] <AchiestDragon> the inputs from the parallel port take direct to pin 3 of the apropriate opto isolater and do not connect pin 3 to ground
[00:30:27] <Jacky^> oh.. yeah
[00:30:28] <AchiestDragon> same with the limit switch inputs
[00:30:44] <Jacky^> uhm..
[00:30:56] <Jacky^> the limit switch are optical
[00:31:23] <Jacky^> 5V are from another ps
[00:31:23] <AchiestDragon> do thay give a 5v out when active
[00:32:04] <Jacky^> not exaclty
[00:32:15] <Jacky^> inverse
[00:32:25] <Jacky^> but this is not much important
[00:32:36] <AchiestDragon> yes it is
[00:32:59] <Jacky^> because i used 3 ic's to isolate the outputs from limit switches
[00:34:36] <AchiestDragon> taking any input on the circut as you have drawn it would require it to drive a 0.01A load
[00:35:12] <Jacky^> no idea :\
[00:35:27] <Jacky^> i just know the limit switch are TTL
[00:36:13] <AchiestDragon> give me a min i will draw you the correct layout for one of the opto isolators
[00:36:29] <Jacky^> ok
[00:38:38] <paul_c> anna_emc: ~ ~~~~ ~
[00:38:45] <anna_emc> hello
[00:38:46] <Jacky^> i used 3 IC 7432 to isolate the output of optoswitches
[00:38:56] <Jacky^> hi anna_emc
[00:39:11] <anna_emc> si divertono ad entrar sul mio pc
[00:39:13] <anna_emc> forse
[00:39:15] <anna_emc> qualcuno!
[00:39:17] <anna_emc> bho
[00:50:48] <AchiestDragon> ok its in dxf format is that ok
[00:51:14] <Jacky^> :)
[00:51:15] <AchiestDragon> http://www.whipy.demon.co.uk/opto.dxf
[00:52:03] <Jacky^> AchiestDragon: thanks a lot
[00:53:45] <AchiestDragon> the transitor and its resistor could be omitted but its advisable to use it , should of added another 4k7 resistor to ground on the input , for when it may be powerd but not connected
[00:54:46] <Jacky^> okay
[00:54:48] <Jacky^> :)
[00:55:23] <AchiestDragon> ok updated that , same link
[00:56:22] <Jacky^> saved, tnx
[00:57:19] <AchiestDragon> should also remeber that not there are 2 grounds ( one for each side of the opto isolator) thease like the power are not connected together
[00:58:26] <Jacky^> yeah
[00:58:55] <anna_emc> night all
[01:32:36] <Jacky^> ouch.. storm
[01:34:08] <AchiestDragon> http://www.metoffice.gov.uk/satpics/latest_IR.html dosent look that big from here
[01:36:01] <AchiestDragon> looks like that other huracane has finaly made land in the us http://www.metoffice.gov.uk/satpics/namerica_IR.html
[01:42:45] <Jacky^> G night
[06:22:28] <sean_> Any one up
[06:27:31] <sean_> I have a emc question
[06:34:57] <sean_> how do I increase axis travel beyond 10"
[06:41:04] <Jymmm> http://www.linuxcnc.org/handbook/part2/freqmod.html
[06:45:11] <sean_> ok so the min max trajectory is what I play with
[11:17:37] <Jacky^> morning
[12:11:04] <anonimasu> hello
[12:12:35] <Jacky^> hi anonimasu
[12:12:41] <anonimasu> what's up?
[12:12:47] <anonimasu> I've been to turkey for a week
[12:13:10] <Jacky^> turkey ? nice :)
[12:13:54] <Jacky^> nothing, always working..
[12:14:01] <anonimasu> :)
[12:15:16] <Jacky^> i'm drawed a schematic for my optoisolators circuit, but seem something is wrong ..
[12:15:33] <anonimasu> :/
[12:15:44] <Jacky^> hi AchiestDragon :)
[12:15:54] <Jacky^> i'm going to modify it
[12:17:08] <anonimasu> * anonimasu have got loads of work piled up for tomorrow
[12:17:12] <anonimasu> but today is a day off
[12:17:18] <AchiestDragon> hi
[12:18:44] <Jacky^> AchiestDragon: i'm working to change the schematic of my optoisolators today
[12:18:56] <AchiestDragon> k
[12:19:20] <Jacky^> i'd like to show to you it when i finish..
[12:19:30] <AchiestDragon> trying to export autocad dxf files into blender , and the other way also
[12:19:54] <Jacky^> np.. few minuts of work
[12:20:30] <Jacky^> i'm looking for some equivalent npn transistor may I already have
[12:20:55] <AchiestDragon> bc550 bc108 and the like
[12:21:11] <Jacky^> ok :)
[12:22:48] <AchiestDragon> think a bc458 /bc457 (the npn one of those 2 should do also ,, and a 2n2222 (if thats the right part for the npn ) is also an equivelent
[12:23:43] <Jacky^> good
[12:23:50] <AchiestDragon> the bc108 is a metal can version of the bc550 thats in a plastic case but almost same spec
[12:24:07] <Jacky^> yeah
[12:25:43] <AchiestDragon> ok found a list of sutable ones ,, one min
[12:27:10] <Jacky^> found 9 2N2222 :)
[12:28:56] <AchiestDragon> 2n3904 , bc547c,bc550c , bc549c , bc337-16 bc546 2n5551 bc548b , 2n2222 , bc107 ,bc108 or any equivelent of those
[12:29:34] <AchiestDragon> 2n2222a
[12:31:30] <Jacky^> thanks, solved with the 2N, now working on eagle ;)
[12:48:01] <anonimasu> *stretches*
[12:48:05] <anonimasu> hey les
[12:48:20] <les> hi anders
[12:53:05] <anonimasu> show's things?
[12:58:05] <anonimasu> s/show/how
[13:21:05] <Jacky^> AchiestDragon: schematic update: http://www.roboitalia.com/modules.php?name=coppermine&file=displayimage&album=lastup&cat=&pos=0
[13:21:26] <Jacky^> i'm not sure about GND yet..
[13:22:32] <anonimasu> :
[13:22:33] <anonimasu> :)
[13:22:44] <anonimasu> why dont you buy geckos?
[13:23:24] <Jacky^> i hope to buy it soon..
[13:23:26] <AchiestDragon> you need to do the same for the other optos ok 7,8,9
[13:23:45] <Jacky^> ah ok.. right i forget :\
[13:24:10] <Jacky^> what about gnd- gnd1 ? are ok ?
[13:24:25] <AchiestDragon> yes the gnd gnd1's are ok
[13:24:51] <Jacky^> resistors 1k in ouput should be ok too..
[13:25:29] <AchiestDragon> yes , not needed but not a problem at that value
[13:26:20] <Jacky^> ok, im changing the limit switches side
[13:26:51] <AchiestDragon> the resistors you have on the outputs should be on the input end of the circuit thay connect to
[13:27:37] <AchiestDragon> and there perpous is to ensure the input is at a known state if there is nothing connected to it
[13:28:14] <Jacky^> between the collector of 2n2222 and the input of optos ?
[13:29:20] <Jacky^> oh.. ok understood
[13:29:21] <AchiestDragon> no the 1 k ones , r7,8,9,10,11,12 , & 16,17,18
[13:37:41] <Jacky^> i could remove it from pcb, the place near the input of drivers ..
[13:37:49] <Jacky^> should be better ?
[13:38:21] <Jacky^> to place it near the input drives
[13:40:16] <Jacky^> if I understood well is for the lenght wire effect, right ?
[14:13:53] <anonimasu> hm
[14:18:14] <Jacky^> * Jacky^ thanks X for crashed
[14:18:17] <Jacky^> :\
[14:18:29] <anonimasu> :/
[14:18:38] <anonimasu> * anonimasu yawns
[14:18:55] <anonimasu> *looking at op amp information*
[14:25:04] <Jacky^> tryng to autoroute the pcb with eagle spiderman appers on the screen :(
[14:25:32] <Jacky^> * Jacky^ ghghg ..
[14:29:01] <anonimasu> heh
[14:31:26] <anonimasu> trying to find some specs on it
[14:53:32] <AchiestDragon> is never happy with most pcb autorouteres ,, thay get things wrong , sometimes its easyer to manualy route the boards
[14:56:50] <AchiestDragon> also found i can route some designs that a autorouter decideds it needs a dubble sided pcb on single sided
[14:57:19] <AchiestDragon> you going to mill out the pcb or etch it ?
[15:00:28] <AchiestDragon> if the cnc im building turns out to be any good i am going to try doing pcbs on it ,, just getting the small milling cutters .5mm :( and hopeing i dont break alot of them
[15:02:58] <AchiestDragon> well some sucsess today ,, managed to import a dxf template into blender , add a 3d mesh , export it back to dxf , inport it into autocad , save it as a diferent version of dxf and inport it into kcam ,and get it in gcode
[15:04:32] <AchiestDragon> but it needs some editing to stop the tool diving straigh into the middle of the mesh and taveling to the corner of it before doing a good job of machineing the mesh out
[15:07:19] <Jacky^> i agreed with you .. i'm manually routing now..
[15:07:45] <Jacky^> i cant use my cnc to mill the pcb at the moment
[15:08:56] <Jacky^> to much red line using autoroute, and to much bridges
[15:09:49] <Jacky^> i will use the iron and laser printer for the pcb, not cnc ..
[15:10:07] <AchiestDragon> :)
[15:11:06] <AchiestDragon> i use a ink jet ,, but print onto plain paper , and photocopy it onto clear asitate for photo etch
[15:11:26] <Jacky^> also good
[15:11:53] <AchiestDragon> there is a compay dose some transfers , you print out on you laser onto the sheet and iron it onto the board then etch
[15:12:01] <Jacky^> would be nice to directly print a pcb on with a laser printer :P
[15:12:11] <Jacky^> I know ..
[15:12:24] <Jacky^> TPC is called, maybe
[15:12:55] <AchiestDragon> well an etch resitant pen in a flat bed pen plotter can get good results
[15:13:09] <Jacky^> I use some lucid paper type, it seem work quite fine
[15:15:16] <AchiestDragon> press-n-peel from techniks.com
[15:17:08] <AchiestDragon> i used to etch my own , but now got a 2yr old son running arround so dont want to have tanks of etchant arround
[16:00:34] <AchiestDragon> if you are interested in the press and peel stuff , but dont want to buy 20 sheets at once from them , sithadmin in ##microcontrollers will sell some single sheets at $1.75 a sheet +p&p
[16:04:47] <anonimasu> hm
[16:07:03] <Jacky^> AchiestDragon: nice
[17:26:49] <_AchiestDragon> _AchiestDragon is now known as AchiestDragon
[18:07:18] <dave-e> anyone awake??
[18:46:55] <dave-e> p_c you hiding?
[19:28:34] <anonimasu> hm
[19:30:26] <Jymmm> what the hell?! YOu all come out of the hiding spaces at the same time.
[19:31:07] <anonimasu> Jymmm: made any parts yet?
[19:32:08] <Jymmm> anonimasu : Heh....
[19:32:28] <anonimasu> Jymmm: ?
[19:33:17] <Jymmm> anonimasu gimme a few minutes to upload a pic
[19:33:19] <anonimasu> ok
[19:44:54] <anonimasu> done yet
[19:44:56] <anonimasu> ?
[19:45:11] <Jymmm> not even close... try at least 20 minutes
[19:45:45] <anonimasu> slow connection?
[19:45:49] <anonimasu> or lots of pics?
[19:56:18] <anonimasu> ?
[20:02:43] <Jymmm> I didn't make that, that is the replacement part I just received 30 minutes ago.
[20:02:48] <anonimasu> hm
[20:02:48] <anonimasu> ok
[20:02:54] <anonimasu> replacement?
[20:03:09] <anonimasu> how's the finish?
[20:03:42] <Jymmm> why are you asking about the finish? it's smooth
[20:04:07] <anonimasu> the pics makes it look rough :9
[20:04:43] <Jymmm> ah. well that jagged slot isn't suppoe to be there... it's a counter sunk hole.
[20:05:04] <anonimasu> ah ok
[20:05:15] <anonimasu> what was wrong with the first one?
[20:05:34] <Jymmm> this is the block that holds the radial bearings for the leadscrews
[20:05:39] <anonimasu> ah
[20:05:51] <anonimasu> I need to make new ones ~_~
[20:06:19] <Jymmm> the original ones were made too short, so the pulley is grinding on the frame.
[20:06:51] <Jymmm> Yes, these blocks will functionally work, but damn that's some ugly/shitty work.
[20:07:06] <anonimasu> :/
[20:07:21] <Jymmm> I'd hate to take this router to a show and let customers see that.
[20:08:18] <anonimasu> * anonimasu nods
[20:30:48] <anonimasu> your or their customers?
[20:31:28] <Jymmm> mine. Imagine showing off at a show with shitty tools.
[20:31:41] <Jymmm> Doens't give a good impression on potential clients.
[20:33:44] <anonimasu> ah well, it's a bit until you can show off anything anyway
[20:34:28] <Jymmm> anonimasu What makes you think that?
[20:34:48] <anonimasu> Jymmm: Have you made any parts yet?
[20:34:51] <Jymmm> The only thing holding me up is a properly operating machine.
[20:36:25] <anonimasu> been doing lots of manual machining?
[20:39:26] <anonimasu> a cnc is just a tool.
[20:40:15] <anonimasu> you should be aware that even with a accurate/good/great machine some people cant machine stuff to spec..
[20:40:28] <anonimasu> your old mounts as a example..
[20:41:04] <Jymmm> Their problem is pure QA (or lack there of).
[20:41:49] <anonimasu> Jymmm: so, have you machined anything by hand?
[20:42:17] <Jymmm> This is a router, not a mill. So if your asking if I've fabricated wood/plastic by hand. yes.
[20:42:30] <anonimasu> no, as in machined.
[20:43:00] <Jymmm> I'm only doing wood and plastic.
[20:43:05] <Jymmm> Not metal.
[20:43:43] <anonimasu> making accurate stuff is more to it then just having tools.
[20:51:35] <anonimasu> Jymmm: ah well, as soon as you start machining you will experence what I mean..
[21:20:06] <mrallen> anyone here used visualmill generated g-code for sherline?
[21:21:33] <anonimasu> yes for sherline/emc
[21:22:12] <mrallen> anonimasu: are you using the post from mecsoft's web site?
[21:22:40] <anonimasu> no
[21:23:17] <mrallen> where did you get the post or did you roll your own? i'm looking at the generated code from their post and have serious doubts it will run.
[21:23:41] <anonimasu> I wrote my own/modified one
[21:23:54] <mrallen> does it handle pausing for tool changes, etc?
[21:24:00] <mrallen> and may i get a copy?
[21:24:05] <anonimasu> I dont have a toolchanger
[21:24:24] <mrallen> i don't have a tool changer either, but i would liek to be able to change tools for multi-pass jobs
[21:24:42] <anonimasu> well, I have no idea about it..
[21:24:52] <anonimasu> I dont have the post at this comp but at the work laptop :/
[21:24:53] <mrallen> so i need it to go to a know spot, lift the Z and pause so I can chang ethe tool ... issuing M0 usually works
[21:25:14] <mrallen> when you get back there, could you email it to me: stewart@neuron.com ??
[21:25:28] <anonimasu> yaeh
[21:25:38] <mrallen> much appreciated
[21:25:48] <anonimasu> it'll be tomorrow the same time as now since I am going to go away for some work :)
[21:25:55] <anonimasu> or well a bit earlier
[21:26:21] <mrallen> great, thanks
[21:26:56] <anonimasu> :)
[21:35:08] <anonimasu> hm
[21:50:17] <anonimasu> night everyone
[22:55:09] <dave-e> hey! anyone home?
[22:57:10] <dave-e> I'm trying to figure out how to set my video to 1280 x 1024 60Hz to make a LCD happy under 4.20!
[22:57:50] <paul_c> only that chicken over there.
[22:58:09] <dave-e> I thought pc was hiding.
[22:58:10] <paul_c> /etc/X11/XF86Config-4
[22:58:28] <dave-e> ok how do I force a given modeline
[23:00:00] <paul_c> Under the Monitor section...
[23:01:06] <paul_c> ModeLine "1280x1024" yadda yadda
[23:03:32] <dave-e> OK...and just pick one that gives the correct vertical
[23:04:13] <paul_c> Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
[23:07:00] <dave-e> we'll give it a try
[23:07:46] <dave-e> is there an easy way to shutdown X windows and restart ... rather then rebooting?
[23:07:58] <paul_c> You can also use ddcprobe to find out what the monitor will support.
[23:09:22] <dave-e> my locate says i don't have it
[23:11:36] <dave-e> I'm going to shutdown so I'm going away.
[23:11:53] <paul_c> one sec
[23:11:59] <dave-e> hopefully I'll be back later
[23:12:10] <paul_c> Ctrl-Alt-BackSpace
[23:12:24] <paul_c> Kills X and it should restart