zomg ... netslpit
[00:59:20] <ejholmgren> http://www.homestead.com/tool20895/CABIN1.html
wow that is impressive hootnannery
also I have determined I hate CNC lathes without tailstocks
I like the 2nd pic down in the left column
I bet it works ;-)
could be dangerous ;)
you go first
as operator ... or target
sure as hell doesn't look like nerf =)
eric_u: we're talking about http://www.homestead.com/tool20895/files/22cal_gattling_gun.jpg
I still have yet to figure out what exactly that first one is
which first one? the top left pic?
looks like the start of the second picture - or similar
its the crankcase for the top right
that configuration is usually used in aircraft, right?
was rather than is
what's the technical term?
think WW2 bombers and DC-3s
what's the benefit
compared to a V-12 or something?
low rpm torque
good cooling by the airstream, light weight
and even then a lot of figher aircraft used V12s
why is the sky blue?
I kid >:)
for fighters the narrow profile of a V helped with drag
for bombers, HP was more important
they made a 4 row one (28 total cylinders) that made 3000 HP from 4360 cu in
I want to buld one of these - http://www.homestead.com/tool20895/files/dif_engine.jpg
then a 4 cylinder bigger one.
oh, actually later versions made 4300 HP
a free piston one would be really cool - but I want to start easy ;)
[01:27:06] <jmkasunich> http://en.wikipedia.org/wiki/Pratt_%26_Whitney_R-4360
amazing technology for 60 years ago
close to 1hp/cu inch as well
jmkasunich: i dont know where i got 'em but there are prints for the 'edwards radial 5' available (I'm looking at a hard copy now). the 'model air museum says they have them but i cant find them yet http://engine-museum.com/.
and here's a radial bike http://www.rotecradialengines.com/Osh/Osh06/3RotecTeam0.htm
ah, i might have got them here http://groups.yahoo.com/group/R_and_R_engines/
( same guy drew this set ) very detailed, 36 drawings.
my kinematics prof used to joke that he took a job at Va. Tech because they had a cutaway radial aircraft engine
that thing was pretty neat, I hope they still have it.
omg, the book from that course now costs $128
03cradek 07TRUNK * 10emc2/configs/sim/axis.ini: support for starting a user-configurable editor on the loaded program or tool table
03cradek 07TRUNK * 10emc2/src/emc/usr_intf/axis/scripts/axis.py: support for starting a user-configurable editor on the loaded program or tool table
03cradek 07TRUNK * 10emc2/share/axis/tcl/axis.tcl: support for starting a user-configurable editor on the loaded program or tool table
03cradek 07TRUNK * 10emc2/src/emc/usr_intf/axis/scripts/axis.py: removed an entry above, so this index has to change
03cradek 07TRUNK * 10emc2/lib/python/rs274/author.py: use tolerance mode
03cradek 07TRUNK * 10emc2/src/emc/usr_intf/axis/scripts/image-to-gcode.py: use tolerance mode
[03:15:43] <ejholmgren> http://www.grizzly.com/products/category.aspx?key=78
what pray tell do those do?
those are planer heads, right?
they are just using machining inserts to do their job instead of blades
that's a lot of inserts
probably just enough to do a decent job
steve_stallings is now known as steves_logging
any other tkinter gurus besides jepler about?
Jymmm is now known as Jymmmmmmmmm
Jymmmmmmmmm is now known as MrAsshole
Sir Mr A
MrAsshole is now known as Jymmm
Skullworks_ yes sir?
were you looking for me earlier?
Skullworks_ is now known as Skullworks_PGAB
NIC changed while power company yanked my meter...
lazy SOB's put in wireless transmitters so they only have to drive down the alley to "collect" meter readings.
short range like bluetooth.
Yeah, should make less errors on the meter reaidng.
I say put transmitters all over and make everyones nill go negative =
To bad there wasn't a way to pull a Tesla... Figure out how to absorb all those emissions and use it as a remote power source.
Old Nic was a crazy coot
Burned down the city power plant with one of his experiments, then build the city a replacement generator that could make the amount of power he reuired.
Jymmm is now known as Red70sShow
Red70sShow is now known as Jymmm
no one at ESC?
in SJ for ESC I mean
I have an invitation, but no time
i think if you register online, you can get in for free.
"A $95 value"
SWPadnos ears ringing?
yeah, but I got the post card
ds3 the big tri-fold one?
You guys need help
Dallur you're here, what more do we need
hmmm. a complete plasma welding system on ebay for $1000,,,, tempting
[08:18:02] <Dallur> http://cgi.ebay.com/THERMAL-DYNAMICS-PLASMA-WELDING-SYTEM-NEW-PRICE_W0QQitemZ260102413273QQcategoryZ25295QQrdZ1QQcmdZViewItem
Dallur: indeed :D
but it's in the US
ds3 You should go harass Steve
Steve? who's steve?
SWPadnos_ = Steve, he's at the ESC
Oh. didn't know his name
yeah, I am going there
Stephen Wille Padnos :)
Ohhhhhh... thought it was something like Software Padnos..
[08:29:44] <alex_joni> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Stephen_Wille_Padnos
good idea :P
Bananasplit sterling.freenode.net <-> irc.freenode.net quits: skunkworks
must go to work :(
somehow I joined the working world.
who had the h bridge-on-a-cap design?
maybe he should patent the name :D
skunkworks: how many watts was your h bridge? :)
* alex_joni thinks 4-500
could i drive them in pwm right from the mesa 5i20? ( or opto drive them )
skunkworks drove them directly from the parport
so I see no problem in doing that from the mesa
wicked, thank you very much
I'd recommend optos though
4-500W meets 2-300$
mesa is pwm+dir - my bridge was pwm+pwm. hoping someone would make that an option for the mesa.
yeah, but you can generate the second pwm from the first.. right_
one inverter should be enough
right - that was the plan
(I am going to play with the pluto first which does pwm+pwm)
is there a visual on this? ( a scope output showing what is desired on the drive signal )
btw - the cap on bridge design was jmkasunich idea.
I've seen HBOAC before :)
tomp: you're driving the 2 H-halves directly
can't have them on at the same time
so 2 out of phase signals
emc lingo is up/down :)
if dutycycle1 < dutycycle2 it runs CW
if dutycycle1 > dutycycle2 it runs CCW
if dutycycle1 = dutycycle2 it doesnt turn
ok, i got the scope picture in my head now :)
* alex_joni launches IRCScope v0.1
this is called up/down ? ( picture got fuzzy suddenly )
yes and no
up/down is very similar but doing digital stuff (steps on steppers)
ok, would a hardware inverter cause significant delay ( if only 40nS or so ) ?
significant = anythingtoworryabout
don't you need 2 'and' gates and an inverter?
just thinking out loud
tomp: if you use a HC or HCT chip, I suspect it's ok
pencil sketch looks like its just inverted, thanks
did not know 'skunkworks' was a regular slang term, translates to something like the slang 'government job' ?
I am talking conveting pwm+dir to pwm+pwm. 2
tomp: you can always run the other leg through a simple and gate (for the same delay)
2 and gates - one leg of each hooked to the pwm out - one of the other legs hooked to direction - and the other leg hooked thru an inveter to direction.
pwm-> and-> h-bridge-in0
pwm-> not-> h-bridge-in1
again, thanks, (doh!)
tomp: no clue - I used only because I have a dodge stealth - stealth plane was made by 'skunkworks'
usually it means a top secret project of sorts.
it always reminds me of the related animal
ah, a REAL government job ( the shop joke when a toolmaker was working on his own stuff was, he said it was a 'government job' )
we use that term also - 'goverment job'
skunkworks: can you point me to your files? i know i found your schematic and jpegs last night, but cant even find my downloads today
old logs had it http://www.electronicsam.com/images/KandT/servostart/
* alex_joni always smiles at the endoder
sorry - was away.
I didn't even notice it until cradek mentioned it to me ;)
where was that site that you can sketch things like pastebin?
[13:46:40] <tomp> http://www.drawblog.com/
[13:48:50] <rayh> http://imagebin.org/
will let you post images.
i got 3 heavy duty copier slides, cast alum frame, nsk rails, 1mm pitch national ball screws, 1um tll linear scale, pittman dc motors with spiral couplers. will try your h bridge and the mesa on it.
this is sort of waht I was thinking 'http://www.drawblog.com/images/20070403064924794.jpg'
[13:50:47] <skunkworks> http://www.drawblog.com/images/20070403064924794.jpg
nice handwriting :P
looks good, thanks, the xtra drive is good idea, with alex's even delays , and optos... save and strong enuf to overcome shop noise
[13:54:19] <alex_joni> http://www.drawblog.com/images/20070403065356764.jpg
that is the actual part list I am using. I would try to find some lower rds mosfets.
I call it .. 'boredom'
ah, great, thanks!
tomp: what are you planning to do with it?
if i can find my niMh batteries will post pix of the slide i will drive
cool. alex_joni: there are opto's on my bridge.
skunkworks: then it's great
i was planning on testing an idea with it.
if emc can position a simple xyz machine tool, then get hal to move an axis without emc control ( but emc knowing the postiion is 'ok' like Dallur does with his torch height control). then moving to another position
( emc would be whats called 'point to point control; ).
The Hal motion would be EDM with feedback from the process to the amplifier, and positions reported to EMC.
Hal motion would return the tooltip to the original position before returning to 'emc' mode.
Here's the test slide http://imagebin.org/7964.
heres one of the machine tools to retrofit http://imagebin.org/7965
tomp: yeah that would probably work
tomp: but that's still a ugly hack ;)
the alternative is to rewrite the trakjectory planner so it wont try to enforce 'ontime & in position' which ruins edm
i cant untangle that code so i work around it
tomp: well, it's this stupid idea with where motion comes from :/
its good for mills and lathes, just not for dynamics which want to be 'on path wherever the process says'
well, or toolchanging..
unless you write toolchanges as macros..
I'd have thought that adaptive feedrate would allow on time and in position to accomodate edm.
i think toolchangin has some new possibilities, if this hack works, then a rack tool changer can work too
well, you can script that in a macro...
tomp: g0 (T*10)
for 10 times the number of the tool to the next raco position
rayh: been thinking about another kind of UI?
the more machine-ish kind we spoke about
okay. what did you come up with?
my mind's all at workstuff right now
rayh: as mydynac (?) demonstarted, edm that always progresses can work with that idea. but real edm doesnt lag behind the process. it follows the process and needs to 'jiggle ( not retract ) edm is not feedrate, edm is process a jiggly signal. we been here before.
I've been thinking about a sane toolkit..
tomp: how about introducing jitter on the output position?
anonimasu: if this hack works, then rack tool changers and t(#1001 * #1002) is ok
in hal, before the signal gets output?
maybe im all on the wrong track..
that jitter would have to stay inside emc's inposition term. we'd just be 'loosening up the control to allow it. i want tight position control based on the process. thats when edm runs well.
* anonimasu nods
better i do it with a hack and evaluate the result :)
thanks all: off to work:)
should i disable apic support in my kernel?
i remember reading that apic's were bad for realtime
that was ACPI
no, acpi != A. programmable interrupt controller, I think
alex_joni: In the background, is there snow in the mountains? http://dsplabs.cs.utt.ro/~juve/blog/index.cgi-files/photography/01168244631/IMG_9508.JPG
hmm.. the white stuff in that pic are clouds
but there was snow on that mountains, can
but there was snow on that mountains, can't see it because of the trees
SWPadnos__ is now known as SWPadnos
oh crap, the processor i bought has netburst
maddash: how's RT on netburst?
lerneaen_hydra: makes me wanna burst
maddash: netburst isn't really all that fun
lerneaen_hydra: i'll post up some latency results after I finish recompiling
what x86 hardware do you guys use? i had quite a difficult time locating a motherboard w/o onboard video
I've been happiest with fast PIII machines
onboard video doesn't matter as long as you can ignore it and put in a video card
server mobo w/ onboard video seem to work
PIII here too
the best one I had is a Athlon 1600+
hm, so my first board (Pent D, intel graphics, sound , onboard lan) wasn't so bad after all?
I had one machine with onboard i8xx graphics that was good for realtime
it was also PIII
then what's the deal with http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Hardware_Requirements?
I don't understand the question
the wiki cries wolf on onboard video
yes it's the most common problem people have
sometimes you get lucky
If you have realtime problems with a system using onboard video, the first thing to do is disable it and plug in a video card.
^^ very good advice
wow, 220.127.116.11 in < 15 min.
anyone want to see the netburst latencies? http://pastebin.ca/422816
did you exercise it? move windows, load programs, etc?
be sure to run opengl stuff too (like a few glxgears)
did i mention that a) i don't have X11 installed and b) the board has no video capabilties whatsoever?
ha that'll help
also was able to disable onboard sound from the bios
netburst's kernel latencies: http://pastebin.ca/422822
vs. Pentium D's kernel latencies (from a month ago): http://pastebin.ca/379779
maddash: maybe watch a movie using libascii ?
alex_joni: fullscreen youtube in w3m
hmm, all i have to do now is figure out what those numbers mean
Overall Max Latency
20000nS is about as high as you ever want to go.
Jymmm: 20000ns under what load?
Also, be sure to disab;e any serial, usb, IDE controllers, etc in the BIOS that oyu're not using.
while compiling a kernel, i'm awfully close to Jymmm's 20ms limit: http://pastebin.ca/422844
(kernel) and http://pastebin.ca/422846
and it's NANOseconds, not Miliseconds btw =)
Jymmm: isn't 20 * 10^3 nanosec = 20 microsec?
yeah, but no need to convert
nano, micro, milli,
Jymmm: did i mention that my zero key is almost broken in half?
femto, pico, nano, micro, milli..
you have two of them
maddash: even there
you STILL have two of them =)
usually on 'M'
* Jymmm snickers *
my boss is going to be warpath when he sees this data
maddash your still at 18000, not THAT bad
well, because of my insistence to find a board w/o video, the ovl max has nearly doubled..
maddash I found a Dell P3 500 w/o onboard video
my laptop does 100,000 nS, but under DOS using TurboCNC it does fine.
Jymmm: hm, so rm -rf emc*?
maddash No, it has BDI on it, just not too usefully for RT
how's the avg latency ccalculated?
hmm, maybe i can focus my boss's attention on lat avg, which has nearly fourthed
Spam Subject: Be like Ron Jeremy
no thanks :)
robin_sz: how much did that plasma cutter cost?
He seems like a very nice guy... just happens to be hung like a horse is all
maddash, which plasma cutter?
[19:12:24] <maddash> http://www.redpoint.org.uk/plasma.jpg
For some reason, I built a 2.5 x 1.25m plasma cutter running EMC as the controller.
alex_joni: that's yours?
robin_sz: never got anything back from your mate
maddash: no, robin built that
alex_joni, ? he said he mailed you asking for more info onthe spec
I never got anything..
hmmm .. I cc'd you on the mail I sent, right?
I got that one
so he had the address OK,
and I think I replied to him a couple of days later
* alex_joni checks
oh, right ... I'll kick him for you
maddash, that was a VERY early prototype
they ended up a lot neater than that
er, you built that?
no, from good parts
[19:18:48] <robin_sz> http://www.redpoint.org.uk/photos/machine2/DCP_1200.JPG
erm, how is v2_1_branch diff from RELEASE_2_1_*?
the RELEASE_2_1_* tags are all along v2_1_branch
v2_1_branch is always the latest thing waiting to be released
so current_tag = RELEASE_2_1_4 == current_tag = v2_1_branch?
I don't understand - v2_1_branch is the latest thing on that branch, which might be the same as the last release, or it might have bugfixes that are waiting for the next release
today there are a couple bugfixes on it that will be in 2.1.5
[19:23:15] <alex_joni> http://cvs.linuxcnc.org/cvs/emc2/VERSION?graph=1
so it'll be v2.1branch for me, then...
maddash, did you like that?
robin_sz: v2.1branch? sure
no the machine silly
wanna see the current version?
current version: http://www.rapidcut.co.uk/products/PL2515.html
did you quit redpoint?
404 Document Not Found
that means robin doesn
that means robin doesn't do them anymore
or it could mean rapidcut fired him :)
maddash, no, redpoint is my computer consultancy company, rapidcut is my fabriaction and sheet metal business
we just do fabrications, not plasmas anymore
too much hassle
yeah, driving around the country answering questions asked by idiots
does that mean i should avoid plasma cutters? because i've always dreamed of getting one...
well, no not idiots, thats unfair
but at least soem of them didnt have any clue how to work one
no, you should build one
with a clue about CNC its easy to use one
with no clue, ... well, its not going to be fun/
first question: halui spindle-override pins are available in the 2.1.4 release or only in the cvs-head?
it is in 2.1.4
most of halui is in 2.1.x
only the new analog jogging pins aren
second question what exactly is the pin halui.spindle-override.value
thinking about the feed override in AXIS I can modify it from 0 to a max%
if I want for example the override be 120% what should be the value for that pin?
1.2? my guess ;)
whee :-) new Z-axis motor
a REAL one
its uber fast and accurate
* crepincdotcom` likes
(FLOAT) halui.spindle-override.value - current SO value
xemet: you can only read that pin, not write to it
spindle override = SO
so if I want 120% I've to?
feed override = FO
you need to set it to 120%
ok, not 1.2
set scale to 0.1, and hit increase 2 times
in the wiki there is an error, halui.spindle-override.value float //current FO value
xemet: yes, 1.2
it says F0, not S0
xemet: fix it :)
xemet: maybe I'm not beeing clear
the idea is the following
you can set SO (spindle override) from more than one place
GUI (AXIS, tkemc, etc), halui, ..
for that to work you cannot use fixed settings
like halui.pin-whatever = 1.2
that is not permitted / doesn't work
yes, but if I want to change it...?
I want a slider in AXIS made with pyVCP to change it
you already have a slider in AXIS which changes it directly
there is one for the feed override
not one for spindle
there is one for spindle speed override too
but you need to enable it in the ini
uhm...I don't ghave it
Ah, how to enable it?
[20:13:31] <alex_joni> http://wiki.linuxcnc.org/uploads/lathe_sim_pyvcp.png
woo hoo - server is fault tolerant again..
there is a MIN_SPINDLE_OVERRIDE and MAX_SPINDLE_OVERRIDE
well, the picture is beautiful, but how to enable it?
xemet: rtfm :P
it's a fine manual :D
well, there is the chat :)
[20:15:41] <alex_joni> http://www.linuxcnc.org/docs/devel/html/config/ini_config/index.html
a question, WHY not all the wiki pages are in the wiki table of contents
xemet: because there are 240 pages
[20:17:24] <alex_joni> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl/emcinfo.pl?action=index
well, exactly this the reason because they should be in the table of contents...
so one can find things...
you cannot have a 240 pages table of contents
not 240 pages...but sections
with other tables...
maybe put the link to the index in the table of contents?
xemet: the wiki is community work :)
I put it under my pillow in hopes of osmosis..
so I could do that
jtr_: the link to the index is at the beginning of every page
jtr_: it's called PageIndex
xemet: you can start a page where you put the structure you propose
if it's ok, we'll move it to the front page
No wonder I missed it...
sorry, not seen the ,message before
jtr and jtr_ are me - I'm at an airport and initially hooked up to a (bad?) access point.
So i guess there's a zombie jtr out there for a while.
jtr_: if you have a registered nick you can type "/msg NickServ GHOST nick"
or GHOST pass? something like that
[04/03 13:27:52] -NickServ- Syntax: GHOST <nickname> [password]
[04/03 13:27:52] -NickServ-
[04/03 13:27:52] -NickServ- If you suddenly get disconnected from your isp or
[04/03 13:27:52] -NickServ- the irc server, sometimes a ghosted client will
[04/03 13:27:52] -NickServ- be left behind. This command can be used to
[04/03 13:27:52] -NickServ- kill the ghosted client so you can get your
[04/03 13:27:52] -NickServ- nickname back. If <nickname> has SET SECURE
[04/03 13:27:52] -NickServ- OFF, and you match a hostmask on <nickname>'s
[04/03 13:27:52] -NickServ- ACCESS LIST, or if you are identified to a linked
[04/03 13:27:52] -NickServ- nickname, you do not need to supply a password.
[04/03 13:27:52] -NickServ- Otherwise, you have to supply the correct
[04/03 13:27:52] -NickServ- password.
ok, thank you alex, I go, good night
On an automated SMT soldering machine, how are the compents kept in place without moving before being soldered?
pick n place
but there are different technologies
the most common is glue under the capsule
I've seen videos, I never saw any glue being used when a component is grabbed from it's contianer
I think it's on the board
or is it on the PCB before placing?
the other way I've seen is they use some solder paste on the contacts
place teh component on it (sticky) then input some heat
maddash_ is now known as sudo_maddash
jmkasunich: could you post a component list for the h-bridge design? 'info' in eagle does not yield any values. i can add the values to the schema and post it back.
Ya know, soldering a wire to a SMT LED AIN'T THAT EASY!!!
where is `man usrmot`?
i can't find the documentation in linuxcnc.org/docs
wiki's got nothing...
there is no man usrmot
if you have built from source, then ~/emc2-head/src/emc/usr_intf/usrmot.c can be read for some info ( like accepted commands )
[22:10:23] <alex_joni> http://cvs.linuxcnc.org/cvs/emc2/src/emc/usr_intf/usrmot.c?rev=1.21;content-type=text%2Fplain
* Jymmm needs a vise that'll hold a 1.1mm x 1.6mm part w/o crushing it. What would MacGyver do???
chewing gum and ice box
[22:12:16] <Jymmm> http://en.wikipedia.org/wiki/List_of_problems_solved_by_MacGyver
actually sounds like you need tweezers, not a vice
cradek that's not a bad idea at all. I could even toss in a bolt/nut to adh the tension
watchmakers will often shellac a part that size onto a much larger carrier, for finishing etc
then soften and throw it in alcohol to get the shellac off without abrasion when done
cradek most tweezers won't give enough tension. to hold it secure (I think), at least not from what I've tried so far.
all depends what you want to do to it
solder what to what?
solder a wire to a SMT LED
Jymmm: I use fingers for that
yeah that's easy :-)
correction, solder lots of wires to lots of SMT LEDs
I thought you wanted to machine it
lots of fingers?
the 1mm part
overarm spring tension, like a 'cats whisker', leave solder area exposed
ah, no. just hold long enough to solder two wires to SMT led
tomp I was thinking something like that
Jymmm: when I need to do stuff like that, I secure the wire
Hey, I could use the clothes pin as the tension, then drill a couple tiny holes to hook
then grab the LED with my left hand, and soldering gun with my right one
alex_joni and the wire?
with the 3rd hand
Jymmm: secure the wire
alex_joni ha, yeah right....
usually on the desk, some sticking out
were talking 30ga, never is straight
I think that's what I'd do too
put a weight on it
yeah sit the spool of solder on the wire
I do the exact same thing
I have forcepts, but the wire still flows to it's natural bended state
Remember, I have to position the wire within 1.6mm
err half of that
quit planning and just go solder it, sheesh :-)
Jymmm: you can get http://www.eng.iastate.edu/twt/Courses/Undergrad/packet/images/sensor/helping%20hands%20with%20sensor.jpg
cradek I did, took me forever
sample output from `ls -l /dev/rt*`:
crw-rw-rw- 1 root root 10, 254 2007-04-04 11:12 /dev/rtai_shm
Jymmm: it shouldn't take more than 1 second to solder it
alex_joni Yeah, helping hands are nice, but the alligator clips usually have larger gabs in the teeth
shouldn't rtai_shm be a symlink?
at least, according to http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?TroubleShooting
alex_joni soler is instant, getting everything aligned is the problem
lots of them? make a jig to hold the leds (several) make a jig to hold the wires (several) then both hands fre to hold pen and solder
maddash: where those come from depends a lot on your rtai version
worse, some are uppercase, some lowercase
I forget which one emc wants
tomp That's the idea, just need to figure out a way to actually clamp the SMT LED and the wires
cradek: does emc expect rtai_shm to be a symlink?
lowercase I think
maddash: that doesn't matter
* alex_joni goes to bed
good night all
alex_joni see you in a few
Jymmm: one of my first soldering jobs (way back) was to make a model of a couple of street corners with street lights.. soldered about 150 LEDs back then
with regular resistors
alex_joni Yeah, if I use regular, I'd just wirewrap and be done with it
fits PERFECTLY on a led leads
the spring clamps used to hold microscope slides http://www.standa.lt/products/catalog/optical_mounts?item=82
(just a piece of thin metal)
I was almost thinking the clips used to hold model rocket igniter leads
and 'fahenstock clips' to hold the wires http://www.crystalrad.com/parts.htm
i'd relieve the lower jaw of a regular allig8r clip and mount the shank end rearward of where the led die went, so only the top jaw pressed down over the die. then you'd have a nice thumb button to release it after soldering
[22:31:23] <tomp> http://www.drawblog.com/images/20070403033041664.jpg
did you see those clips I linked to... flat, no teeth
[22:33:30] <Jymmm> http://www.muellerelectric.com/images/BU34.jpg
could use those to hold the led and the wires too
i think you might want a little 'well' under the top jaw to place the led into ( a locator divot ), so the lower jaw might be removed
yeah, will have to think about this, I don't have any bits that small, would have to use a razor blade.
removing your lower jaw would be a bit extreme, makes eating difficult
skunkworks: could you point me to a full parts list for the h-bridge?
i'd like to order the parts and cant determine the values for any caps of resistors, or the chip used for q4 ( suspect opto-isol8r), also the 15v-reg is not on the pcb as far as i can tell.
skunkworks: jmkasunich: wait. isee the parts already total 120$ for 1 amp while mesa offers a dual 400 watt hbridge fpr 161.
you will need to get that info from skunkworks
I just laid it out ;-)
where are you getting $120 from?
and where are you getting 1A from?
skunk's bridge is good for about 20A IIRC
ok, spreadsheet said 120, digikey & mouser...and 1 amp(lifier) not 1 amp(ere)
IIRC he's using a pair of IR2110 or similar gate drive chips, I would hope they're under $5 each (maybe $2 each?)
the FETs should be $5-10
skunks bridge is designed for up to about 200VDC input
fet 16.52 each, rurg 7.41 @ , driver 7.56 each....
at 20A thats 4000 watts (peak)
i only need 24V at 9amp
digikey & mouser
that seems like high amps and low volts - not good for efficiency
pittman 30.3V motor rated 19A stall
but if its what your motor wants...
but it's an assy that i have already, just to test an idea
what is the 9A based on?
the power curve suggested they'd run at a reasonable speed/torq with those values
not maxing anything, middle of the road stuff
with such low voltage, I'd give some serious thought to paralleling '298s, especially if you don't really need that much current
I'm not real familiar with 298s, (cradek is) but I think they work up to 40V, and are good for a couple amps
seemed 298 was near 80-100watt, i'll look to see how to parallel them tho
watts is deceptive
use amps and volts
watt = va