i just finish to draw the schematic of optoisolators circuit
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
if ok, I could start buidling the pcb ..
well r1 to r6 are wired wrong
Jacky^: The 390R resistors - I'd be inclined to use 1K
ok, i can change it with 1k, np
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
Take pin 3 of each 6N137 to the Parport pin
the parport can sink more than it can source
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
i just looked at the datasheet :(
in the example application they was using 470 ohm resistor..
yes 470 is right for an led
but the way you have them wired will keep the led on all the time
should be ok
i will replace the 470 hom resistor with 1k
the inputs from the parallel port take direct to pin 3 of the apropriate opto isolater and do not connect pin 3 to ground
same with the limit switch inputs
the limit switch are optical
5V are from another ps
do thay give a 5v out when active
but this is not much important
yes it is
because i used 3 ic's to isolate the outputs from limit switches
taking any input on the circut as you have drawn it would require it to drive a 0.01A load
no idea :\
i just know the limit switch are TTL
give me a min i will draw you the correct layout for one of the opto isolators
anna_emc: ~ ~~~~ ~
i used 3 IC 7432 to isolate the output of optoswitches
si divertono ad entrar sul mio pc
ok its in dxf format is that ok
[00:51:15] <AchiestDragon> http://www.whipy.demon.co.uk/opto.dxf
AchiestDragon: thanks a lot
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
ok updated that , same link
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
[01:34:08] <AchiestDragon> http://www.metoffice.gov.uk/satpics/latest_IR.html
dosent look that big from here
looks like that other huracane has finaly made land in the us http://www.metoffice.gov.uk/satpics/namerica_IR.html
Any one up
I have a emc question
how do I increase axis travel beyond 10"
[06:41:04] <Jymmm> http://www.linuxcnc.org/handbook/part2/freqmod.html
ok so the min max trajectory is what I play with
I've been to turkey for a week
turkey ? nice :)
nothing, always working..
i'm drawed a schematic for my optoisolators circuit, but seem something is wrong ..
hi AchiestDragon :)
i'm going to modify it
* anonimasu have got loads of work piled up for tomorrow
but today is a day off
AchiestDragon: i'm working to change the schematic of my optoisolators today
i'd like to show to you it when i finish..
trying to export autocad dxf files into blender , and the other way also
np.. few minuts of work
i'm looking for some equivalent npn transistor may I already have
bc550 bc108 and the like
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
the bc108 is a metal can version of the bc550 thats in a plastic case but almost same spec
ok found a list of sutable ones ,, one min
found 9 2N2222 :)
2n3904 , bc547c,bc550c , bc549c , bc337-16 bc546 2n5551 bc548b , 2n2222 , bc107 ,bc108 or any equivelent of those
thanks, solved with the 2N, now working on eagle ;)
AchiestDragon: schematic update: http://www.roboitalia.com/modules.php?name=coppermine&file=displayimage&album=lastup&cat=&pos=0
i'm not sure about GND yet..
why dont you buy geckos?
i hope to buy it soon..
you need to do the same for the other optos ok 7,8,9
ah ok.. right i forget :\
what about gnd- gnd1 ? are ok ?
yes the gnd gnd1's are ok
resistors 1k in ouput should be ok too..
yes , not needed but not a problem at that value
ok, im changing the limit switches side
the resistors you have on the outputs should be on the input end of the circuit thay connect to
and there perpous is to ensure the input is at a known state if there is nothing connected to it
between the collector of 2n2222 and the input of optos ?
oh.. ok understood
no the 1 k ones , r7,8,9,10,11,12 , & 16,17,18
i could remove it from pcb, the place near the input of drivers ..
should be better ?
to place it near the input drives
if I understood well is for the lenght wire effect, right ?
* Jacky^ thanks X for crashed
* anonimasu yawns
*looking at op amp information*
tryng to autoroute the pcb with eagle spiderman appers on the screen :(
* Jacky^ ghghg ..
trying to find some specs on it
is never happy with most pcb autorouteres ,, thay get things wrong , sometimes its easyer to manualy route the boards
also found i can route some designs that a autorouter decideds it needs a dubble sided pcb on single sided
you going to mill out the pcb or etch it ?
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
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
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
i agreed with you .. i'm manually routing now..
i cant use my cnc to mill the pcb at the moment
to much red line using autoroute, and to much bridges
i will use the iron and laser printer for the pcb, not cnc ..
i use a ink jet ,, but print onto plain paper , and photocopy it onto clear asitate for photo etch
there is a compay dose some transfers , you print out on you laser onto the sheet and iron it onto the board then etch
would be nice to directly print a pcb on with a laser printer :P
I know ..
TPC is called, maybe
well an etch resitant pen in a flat bed pen plotter can get good results
I use some lucid paper type, it seem work quite fine
press-n-peel from techniks.com
i used to etch my own , but now got a 2yr old son running arround so dont want to have tanks of etchant arround
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
_AchiestDragon is now known as AchiestDragon
p_c you hiding?
what the hell?! YOu all come out of the hiding spaces at the same time.
Jymmm: made any parts yet?
anonimasu : Heh....
anonimasu gimme a few minutes to upload a pic
not even close... try at least 20 minutes
or lots of pics?
I didn't make that, that is the replacement part I just received 30 minutes ago.
how's the finish?
why are you asking about the finish? it's smooth
the pics makes it look rough :9
ah. well that jagged slot isn't suppoe to be there... it's a counter sunk hole.
what was wrong with the first one?
this is the block that holds the radial bearings for the leadscrews
I need to make new ones ~_~
the original ones were made too short, so the pulley is grinding on the frame.
Yes, these blocks will functionally work, but damn that's some ugly/shitty work.
I'd hate to take this router to a show and let customers see that.
* anonimasu nods
your or their customers?
mine. Imagine showing off at a show with shitty tools.
Doens't give a good impression on potential clients.
ah well, it's a bit until you can show off anything anyway
anonimasu What makes you think that?
Jymmm: Have you made any parts yet?
The only thing holding me up is a properly operating machine.
been doing lots of manual machining?
a cnc is just a tool.
you should be aware that even with a accurate/good/great machine some people cant machine stuff to spec..
your old mounts as a example..
Their problem is pure QA (or lack there of).
Jymmm: so, have you machined anything by hand?
This is a router, not a mill. So if your asking if I've fabricated wood/plastic by hand. yes.
no, as in machined.
I'm only doing wood and plastic.
making accurate stuff is more to it then just having tools.
Jymmm: ah well, as soon as you start machining you will experence what I mean..
anyone here used visualmill generated g-code for sherline?
yes for sherline/emc
anonimasu: are you using the post from mecsoft's web site?
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.
I wrote my own/modified one
does it handle pausing for tool changes, etc?
and may i get a copy?
I dont have a toolchanger
i don't have a tool changer either, but i would liek to be able to change tools for multi-pass jobs
well, I have no idea about it..
I dont have the post at this comp but at the work laptop :/
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
when you get back there, could you email it to me: email@example.com ??
it'll be tomorrow the same time as now since I am going to go away for some work :)
or well a bit earlier
hey! anyone home?
I'm trying to figure out how to set my video to 1280 x 1024 60Hz to make a LCD happy under 4.20!
only that chicken over there.
I thought pc was hiding.
ok how do I force a given modeline
Under the Monitor section...
ModeLine "1280x1024" yadda yadda
OK...and just pick one that gives the correct vertical
Modeline "1280x1024_60.00" 108.88 1280 1360 1496 1712 1024 1025 1028 1060 -HSync +Vsync
we'll give it a try
is there an easy way to shutdown X windows and restart ... rather then rebooting?
You can also use ddcprobe to find out what the monitor will support.
my locate says i don't have it
I'm going to shutdown so I'm going away.
hopefully I'll be back later
Kills X and it should restart