No response from jt_plasma. Does that mean he has blown up the PC and the intertubes?
the last tab has a hook on it
The pictures I can find on the interweb all show hooks, I have no idea what they are for, I am not a PC kind of chap.
:/ it won't power up now
is your bios configured for an agp card?
jt-plasma: YOU FORGOT THE BBQ SAUCE!
i know at least mine has that option in bios
Is card-voltage jumper-configured somewhere?
that is all it takes is agp
and yes, the BBQ sauce as well
I must have dorked the mobo putting on the heat sink and fan :/
power supply won't even come on
Well, pull the card out and see if it powers up then?
Switched on at the wall?
plugged in? lol
I put the old heat sink back on and it powered up :?
jt-plasma: cpu heatsink?
LONG PAUSE FROM jt-plasma
Anything useful here: http://www.neoseeker.com/forums/17/t1447748-boot-with-new-agp-card-card-mobo-fine/
jt-plasma: make sure your heatsink grease is covering the entire contact area for the processor or you'll have issues
I put the new agp card in and it powers up...
the heatsink came with grease on it all ready
I suspect it wasn't seated properly
* jt-plasma takes the angle grinder to the heat sink for revenge
I don't think the heat sink is touching the cpu properly ro some reason
damm heat sink touches the socket...
* jt-plasma gets his Stihl Chain Saw out
Jymmm: wins the prize, where do you want the slice of jerky sent
and Jymmm will be by to pick it up LOL
* jt-plasma thinks I'll make some more jerky this weekend...
wonder if my truck still starts, i need to go gets some rocks for the front yard
parents are coming out this month, guess i should clean up and tidy up the landscaping a bit
maybe at least pick up the dog poop lol
and the beer cans :)
jt-plasma: how do you make the jerky? dehydrator?
cans? i'm not that white trash, i at least buy good beer lol
in my smoker
mmm sounds good
i tihnk my dad would be upset if he thought i was drinking crappy beer
measuring ingredients for jerky http://i47.photobucket.com/albums/f163/johnplctech/Smokin/Cure.jpg
sure it isnt a methlab?!
making snack sticks
[00:40:23] <jt-plasma> http://i47.photobucket.com/albums/f163/johnplctech/Smokin/Snack%20Sticks/Grinding.jpg
in a blizzard http://i47.photobucket.com/albums/f163/johnplctech/Smokin/Snack%20Sticks/Smoking01.jpg
Canadian Bacon http://i47.photobucket.com/albums/f163/johnplctech/Smokin/Canadian%20Bacon/CB03.jpg
I hope I didn't bbq the cpu :/
damn now i'm hungry
whats the little box next to the smoker with the readout? a temp control unit you made?
plc smoker control
must have smoked it :/
nice! (about the smoker) shitty about the cpu
is it a P$?
Socket A motherboard
i have spare processors that might work
I might have some in all these spare computers laying about
this one had an amd processor
is it the same as a socket 462?
the manual says socket 462
let me know, i have several kicking around
processors, that is
ok, time for me to cook pizza
you can have one if you need
talk to you later
amd xp2600 processors
my wife speaks spanish but I do not LOL
anyway it is time to cook
jt-plasma: Glad you found the issue
Jymmm: he said its cooked
How so? He said he replaced a card and it booted up
down further he said he must have smoked it
Making more progress on my Joe's 4x4 Hybrid
Just mounted the fans for the controller box tonight http://www.lascolinascnc.com/2010/02/11/controller-fans/
I can almost taste it
saw dust can have that effect
rats, my cycle time counter resets for m00 and m1's
coworker picked up some amc drives that take pwm+dir input (will do brushed and brushless) and they run real nice off the printer port. :)
skunk what's the normal ipm of a parallel port ran cnc?
your limited by how fast you could read the encoder back in.. (if you are closing the loop) I was playing around with it as a spindle..
ahh I'm using steppers.. open loop
my setup seems rather.. slow
ya it all depends on the jitter and the step size I put in
if I can get my jitter down it would help
change the max velocity in the ini file and see if you can get it any faster
what's your jitter?
a little high
I had it under 6000 at one time
when I compiled the smp kernel... but I haven't reinstall that kernel yet
i dont think 15000 is horrible though
if I edit the ini file, I may go over the bandwidth of the parallel bus
my mill is probably around 12000ns
ya but your using a mesa card yes?
kinda doesnt matter i guess
I would think that would make a difference
SMP kernel isn't that hard to put in
I think its even in a repo somewhere?
ya I know, I had it installed at one time... but ended up reinstalling the whole ubuntu
wiped the smp kernel and haven't reinstalled it
whats an smp kernel?
it's for a dual core processor
but ya my ipm is real low.. like 18ipm
I'll try bumping up the velocity in the ini and see what it does
means you have one CPU reserved for realtime stuff
18ipm is rediculous
no reason it should be that low
180 would be a better start ;->
if my big lump of iron does 110, i would think his desktop millshould do at least that.
mesa card or no mesa card
I'm workin on it lol... I'm just a noob here
thought yours would do that while cutting lol
ours runs at 240 on rapids atm
ha, i have cut some stuff at 110ipm, accidentally
direct drive servo
well thats why
thats mainly because I'm scared of running it faster
i have 1350oz in steppers, slower than molases
ours are 500w scooter motors
oh yea i remember yours now
you should, its awesome ;->
did I show you the rotary table?
i dont think so
[02:25:32] <Valen> http://www.vapourforge.com/russell/mill/rotary_table/11012010455.jpg
dad made these on it the other day http://www.vapourforge.com/russell/mill/clamps/05022010509.jpg
not the rotary table
thats not running yet
they are dead set the most sexy clamps I have ever seen lol
haha yea, way better than the purchased ones
how big is that servo?
well they were plastic and exploded the first time he tightned it up
500W 5000RPM into a 100:1 harmonic drive reducer
physically ~30cmx8 or so?
is there any backlash?
harmonic drives are sposed to be 0 backlash
theres none I can feel
roughly speaking its about the size of my forearm
its a propper servo ;->
[02:35:33] <skunkworks> http://mcmastercarr.com/
heh - That wasn't supposed to be pasted here.. ;)
sure, we all know what pr0n you like
It's a propper servo!! I like it. ;)
* tlab_ compiles the kernel
i think ill order some encoders now
for the mill and lathe
skunkworks: ey well our other "servos" are scooter motors and linear scales
I gotta say i love having a toolchanger
you are a tool changer
Finally, i'm actually not
are there anyone that makes an ATC for the smaller machines?
oh i dunno, i dont think so
for the next size up, there is the tormach stuff
make your own
there isnt a ton of moving parts
just donno how to get the alignment to repeat
how do the tool changers work?
lathe or mill?
[05:00:44] <danimal_garage> http://www.youtube.com/watch?v=jE8xAXmYv4Q
on the mill
danimal i hate you ;-P
limit switches are done
what kind of machine is it?
frysteev: WooHoo, Now make me a cheeseburger
umm it might taste of cutting oil
my lathe toolchanger is just an 8 position turret, nothing to write home about
it's a Shizuoka AN-S
so those are CAT-xx holders?
a NMBT-40 is about the size of my spindle
probably a bit overkill for this machine, i think a 30 taper would be fine
but NMBT-40 holders are dirt cheap and easier to find
here's some pics of the mill: http://smg.photobucket.com/albums/v20/danielwilcox/shizuoka/
*nod* it just takes a machine big enough
danimal_garage: that is awesome
is your lathe turret changer an ATC?
and here's the lathe: http://smg.photobucket.com/albums/v20/danielwilcox/hardinge/
frysteev: as long as it's all organic and food grade safe
food milling hmmm
Jymmm: i got some soy based cutting oil you can try
better be food grade
danimal_garage: horizontal or vertical and how many positions?
check the last link i posted, it shows the turret
It's a Hardinge HNC
I used a very close japanese copy of your lathe
is there diy tool changers?
with the same tool changer.. what kind of control is on there?
EMC on both machines
the copy I used had a fanuc control
is that 16C spindle?
so that is different
it's a 30 year old lathe
that clone is probally the same age... it had a paper tape reader on there
this had an old GE control, but it was crap
yea so did this
i think this was pre-fanuc
always wanted to see what the original it was copied from was like
there it is!
serial number 416
does your ATC jam?
no, i got it dialed in pretty good
it did though
there's a magnet you have to adjust
danimal_garage: Is this your photo? http://smg.photobucket.com/albums/v20/danielwilcox/shizuoka/?action=view¤t=DSCN0779.jpg
Oh? we used a 12"length of broom stick to unwedge it
but then that was a machine at a JC
danimal_garage: Did you wire that panel?
yes, never said i was a pro :)
danimal_garage: It's called PANDUIT
i dont know what that is and google brings up 100 different results
[05:19:55] <Jymmm> http://media.digikey.com/photos/Panduit%20Corp%20Photos/H4X4LG6.jpg
It's plastic 'U' shaped track for running cabling
comes with a cover too
oh that crap, i got a bunch of it, but it wont work well for the room i had
Yo have PLENTY of room
but not plenty of wire
some of the cables come off of stuff that would be a bitch to swap out
like the tool changer
Again, no excuse. I've seen ppl get fired for having a wiring closet looking like that
ok, i'll fire myself
the ribbon cable makes it look worse than it is
I'm ignoring the ribbn cable (for the moment)
danimal_garage: I can tell you EXACTLY what the problem was... you were just anxious to get it going.
Also, I don't see any CB/fuses in there
For any of it (but could be out-of-view)
there is fuses for higher voltage stuff
not for the 5v stuff
from the mesa boards
there's 2 other enclosures on that machine
As a side-note... I dont like that the SSR relays are mounted in such a way that someone could reach in and touch the contacts inadvertanly.
Adn the HIGH side too
they'd get a death-defying 5v shock
depending if there are no floating grounds anywhere
they arent high voltage
and 5VDC side of a PC PS is 10A+ potential
it only take 80mA (iirc)
and switcher PS are not isolated (typically)
danimal_garage: and wth is the grn/wht twisted pair so tight?
i really dont see where i could put that panduit stuff
it's twisted the same way it was under the sheathing
Ok, flip all the boards so the ribbon cable is on the right, instead of left.
i didnt twist it
danimal_garage: No, it's AWEFULLY tight
then my cables wont reach
no slack in it
danimal_garage: Well, next time take that into consideration. you need the slack
optical illusion, there's some slack.. i just opened it and looked
I can only go by what I can see in the pic.
i use my machines to pay the mortgage, i cant spend too much time to make it look pretty. i'm the only one who touches the machines, so noone is gunna get zapped
i know you'll say no excuse, but tell that to my lender lol
I can appreciate that. But when you count on something to put food on the table, you also want to give it some TLC too
Not have it fail when you need it most
danimal_garage: I'm not trying to be an ass, just put a lil TLC in it s all I'm saying.
being that i built it, i can troubleshoot it fairly quickly.. but i see your point
i know. it's lightyears beyond what it was before though
i'm a machinist, i have no training in this stuff
there is a learning curve :)
sorry, i'm cranky, i just finished working and i havent eaten more than a bowl of ceral and a pb and j all day
danimal_garage: From Star Trek - famous catch phrases
never seen it
pizza is cooking!
the ORIGINAL Star Trek
never saw any of them
or star wars
i cant stand sci fi
"I'm a doctor, not an engineer."
"I'm a doctor, not a mechanic."
His nickname (and now yours) is 'Bones'
ok, i'm jack of all trades, master of none
Been there, still doing that
i'm sure that enclosure will change 8 times this year lol
Well use some of that panduit, 1.5" works nicely for the most part
yea, i got a bunch of it from various things
i really need to string a new cable from the tool changer
Score with a carpet knife and snap
it's barely long enough to reach
to remove tabs easily when you setup a 'T'
(that's what she said)
i should just get a huge cabinet and consolidate
hmm they do have some at the surplus yard
I have no place for a huge cabinet, so I'm trying to work with a full height PC case - gutted, or some smaller ones (that look cool), but not enough room for everything cleanly
yea, i dont have a ton of room either.
I have a 3rd enclosure that's awesome, but I need to cut some square holes and nfc how I can do that cleanly (no access to a mill)
i have 2 enclosures about that size (12x16x20 ish) plus a smaller enclosure, and my vfd-s and resistors are mounted on the back of the mill
jig saw works well
Not in 1/8" steel =)
that's pretty thick for an enclosure
most of mine are like .07" ish
Sure, but this one is cool =)
the size of enclosure i'll need will be big enough to crawl inside
if i wanna fit everything
stepper power supply is pretty large
plus VFD, braking resistors, and the VFD braking unit
all that crap
unfortunately takes up some real estate
well pizza's done, gotta run. adios
[05:54:55] <frysteev> http://www.youtube.com/watch?v=8PSG2al1Sus
needs more wood
...and duct tape
see, mine isnt the worst one out there
scope? He has a scope? does he mena on his bb gun?
nylon rope counter balance - nice!
dual head - awesome!
[07:01:53] <frysteev> http://www.youtube.com/watch?v=8I3diD1lpho
getting the emc listserv on a usable email account might be bad for my mood
frysteev, wtf =)
has to have a flex of the X axis of like an inch :P
Hey Guys, I have a charge pump circuit enable to my PMDX.... Now when my computer did shut of due to thermal heat, my router went on/off for a split second. COuld that be because the charge pump is to slow to notice that my computer is off?
ries: the chargepump usually has a time constant
it's probably mentioned in the manual how long it is
but something around 1 second is to be expected
alex_joni: it states I need to feed it with 100Hz, for me that would mean during any fault, my outputs stay active for at least 100ms (depending on the implementation of the CP)
ries: usually at least 5-6 cycles before it notices an error
I have had two times my computer shutting down due to thermal problems, and my router did turn on/off for a split second. I think this is because my CP circuit is to slow.
did anything happen when it turned on?
alex_joni: it did shut of right away, it's just a split second
hefty steppers these ones ries =)
frallzor: yeaaa... that's why you need a estop circuit ;)ç
bill20r3 is now known as bill2or3
LawrenceG: How da hell are ya?
JT-Work: I heard you had a issue with a mobo
Jymmm, hey... not too bad.... listening to the olympics mayhem in Vancouver on the radio
people taking over downtown and putting it in gridlock
they are doing the final parts of the torch run for the opening ceremonies tonight
175M budget for security and they are over a billion so far and all it takes is one doorknob with a hand grenade to put a kink in the system.. they blew up a fishing rod yesterday (unattended package)
I am glad I am 60miles from the action
heh - really? funny. I don't really know canada at all. I always assume all this stuff is taking place on the east side of it.
what is the format of MAX_VELOCITY = in emc ?
inches? mm ?
if i set it to 118.11 inches i wont get 300mm/s
machine units - units/sec
with the money spent on the olympics, they could probably have bought everyone that wanted one, a bridgeport with emc2
ahh depends on how many steps it is etc?
input scale 157.48
units as in units of measure
inches or mm
if your unit is mm, you put it in millimeters
Danimal-office, but if i set it to 300 it becomes like 28000mm/sec
then you have your units set wrong i'd assume
1.95 becomes 117mm/s
MrSunshine: What do you have the units set to? Inches or mm?
Jymmm, its the axis_mm profile
MrSunshine: What do you have the units set to? Inches or mm?
you need to set units in the ini
ok then, there ya go
im editing that
i think you might have your scale off maybe?
settings MAX_VELOCITY to 1.95 and when i start axis its 117mm/s
"INPUT_SCALE = 157.48"
117mm/s or mm/min?
ahh min :P
there ya go
ahh got it =)
that makes sense - 1.95*60 = 117mm/min
1.95 * 60
that's the kinda mistake i make :)
thanks for the help
25mins to cut a 60x99mm block of 10mm alu
i need higher speed spindle and better endmills :P
and less friction
i wonder how to fix the friction problem .. or stronger steppers :P
I'm having a hard time making a .config file for smp to work on emc, anyone have any suggestions? I thought a step thru on how to compile the kernel was in the emc docs but I don't see it
what kind of aluminium has the best millability ? :)
I'd say it depends on what you have =)
i think 7075 machines alot better than 6061 but it's more expensive
7075 doesnt stick to the cutters nearly as bad as 6061
MrSunshine: are your steppers stalling?
might be an acceleration issue if it's stalling at slower speeds
like durring starts and direction changes
hi all, can you please tell me the name in english of this http://www.bocchicontrol.it/prodotti_dettaglio.jsp?cid=14&sid=96&p=0&id=326
it is a base where you can do precise measures, commonly used in mechanics
Jymmm: yep cpu I think and a case of DA
but dont know its name in english
Deffie surface plate
thank you :)
man, they had vernier calipers on that page
i havent seen anyone use those since trade school
some people swear by them
except for extremely large sizes
my eyesight is too bad
I use a 12" all the time
I'm too cheap to buy a decent 12" dial
I used one the other day, no issues
i dont even like dials
i use mitutoyo digitals
I like dials the best. I have a good b&s 6" that has never wronged me
i'm not clean enough for dial calipers
I've only wronged myself
i usually get some sort of crud in there and it jumps on me
verniers and dials require actual thinking
this one, best there is IMO: http://www.lie-nielsen.com/catalog.php?grp=1350#
didn't know they still existed
micrometers require thinking too
I use the b&s 100 times for each time I use a micrometer...
i got a set of those cradek
(and yeah I am much more likely to screw up reading the micrometer)
they're pretty beat though, i use them for scribing
sharpened the depth guage?
they were dropped one time too many
not good enough for actual measuring
they were really nice when new though
does a digital caliper survive a drop?
that's a nice advantage then
i've had the same pair for about 12 years
and they've been through the war
tips are getting worn now
time to replace i guess
cradek: i lost mine in my garage that was prone to flooding when i lived back east. I found them under my bench frozen in the ice under my workbench. They had probably been there for 1-2 months. Still worked fine after they defrosted and dried out
must be 440-c or something, they never rusted
krushia_ is now known as krushia
my first caliper was varnier.. Now I only touch the 4ft'er.. :)
I am the same as far as calipers go. I use my digital 99% of the time and micrometers for the last .003" if it has to be that accurite.
yea same here
cant go wrong with decent digitals
even cheap ones are pretty decent. ;)
i've only had to calibrate mine maybe a few times in the past 12 years, and i suspect a couple of those times was because some douche who barrowed them tried zeroing them out with dirt on the blades
cheap ones have a bit of flex.. i never go cheaper than mitutoyo. I guess maybe the fowlers are ok, but still..
the chineese ones change quite a bit of you squeeze a little hard
I zero mine all the time. It works nice for lets say turning a shaft. zero it to the size you are shooting for. Then you know How much you need to take off.
yea i do that too, but mine have a zero button and an orgin button. The orgin button is what you use to calibrate them
the zero button is only active till you turn them off and on
then it goes back to orgin
so you never loose your original calibration
ah - Mine are not that complicated. ;)
it's a pretty handy feature
[18:51:46] <skunkworks> http://www.electronicsam.com/images/KandT/DSC_0242.JPG
ok i'm off to get rocks for the front yard.. adios
anyone know why my SMP kernel wouldn't show two cpu's?
do you have two cpus?
if so, do you have the right acpi options enabled to bring up the second cpu?
hmm I think I have all the acpi disabled
I think I needed some of it on my dual P3
I had it working at one time.. with hyperthreading but I've disable hyperthreading
can you use some of the premade experimental smp kernels?
[19:40:07] <tlab> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC_With_Custom_Kernel
I use this guide... but my .config is messed up
[19:40:17] <skunkworks> http://linuxcnc.org/experimental/
I have the newest emc install... I guess I could downgrade emc
if you disabled hyperthreading maybe you only have one processor
it depends on your machine
I read some where that hyperthreading doesn't help emc
and to disable it
but ya I dunno for sure
costly vernier not needed
since many times grinding finish will work
only needed for these grinding finish
also you can translate measure from a micrometer, gauge to a chinese
that experimental smp kernel, etc doesn't support all my memory ugh..
way OT but does anyone know why a gnuplot should flash on the screen and then go awan?
gnuplot 4.2 patchlevel 2
-persist lets plot windows survive after main gnuplot program exits.
certainly worth a try
Ah much better :-)
Anyone know how to round a float? Like make 0.9999999 become 1 instead of 0 when seen from classicladder.
yes, and think carefully about negative numbers before you do that
OH, of course...
I need stepgen.n.position-fb rounded and feed into classicladder as an IFn.
So the adding would have to occure outside of cl.
if you don't need much resolution, you could use a lesser scale divisor, and then round/scale in integer space once inside CL
like instead of having each tool position be 1.0 position apart, make it 10.0 or 100.0
then inside CL you can (...+5)%10 or whatever
That might work.
I won those iBE drives on eBay, but when I collected them, they were not iBE. They were plain ordinary BE series brushless motors with gearheads, and NEMA 16 frame size. I am disappointed, but glad I went to collect rather than have them arrive through the post in a surprisingly small box.
Very nice little motors, with the emphasis on "little"
In emc 2.3.4, is there no math function that can be used in the hal file to do things like rounding and adding?
Adding yes, and also float to int
the float to int truncation...
the float to int uses truncation...
so how does one add, say 0.5 to the output of stepgen.n.position-fb?
setp sum2.in0 0.5 ; net stepgen.n.position-fb => sum2.in1 ;
(actually, depending on how many sum2 blocks you have, it will be sum2.0.in0 or sum2.1.in0 etc)
This weekend I will be mainly making the head of my mill tilt.
One fun job will be making the curved T-nuts.
(The plan is approximately to add two discs and a pivot between the dovetail casting and the gear housing)
Thanks, I was looking for something called 'ad', 'math', or something, and did not even notice 'sum' in the list of components...
setp can be used to set the value of an input pin?
Or did I not understand the part about 'setp sum2.in0 0.5'?
the add has two inputs that it sums togather. your setting one as 0.5 and the other is your position-fb. the output from it is going to be fb+0.5
I really appreciate the help. I know sometimes my questions might be a bit 'dumb'.
Well, I got to go now ... Thanks again.
Yes, setp probably stands for "set pin". You can set them to a constant (and then change that in the HAL config viewer). There is also a "Constant" block but I have not found a use for it yet.
Can you use "constant" as a variable, to store a result from one HAL cycle to the next?
I can see that being used in conjunction with a PID block for thinks like closed-loop spindle control.
'constant' is just a historical artifact - it has no use now
I remain a bit confused by HAL in general.
What are the signal names for?
in very early days of hal you couldn't setp a pin. if you wanted it to have a value, it needed a writer. so you'd use a constant component.
andypugh: to tell them apart
I created a bunch of signals called LED0, LED1 etc net-ed to some spare pins on my 7i43. My idea was I could reference LED0 as a telltale on some other signal in the HAL to watch it. But I don't think it works like that?
Or does linksp let you do things that "net" doesn't?
net does everything linksp does and more. (allowing you to hook multible things together and creating signals)
andypugh: re: curved tnuts, maybe just make thm rectangular base shorter than the chord, and use a round post not rectangular
and congrats on the win ( sorry not ime )
Yeah, I paid a lot more than I wanted to, but I had spent a week plotting what I was going to do with them. I got a refund.
really the tnuts just shouldnt turn, i have some curved, they are cute, not worth replicating
the heads on my 2 agie abs tilt +/-45deg
[22:18:31] <tom3p> http://www.elitemachinery.co.uk/toolroom/Agie-AB_M-Spark-Eroder.htm
nice condition, with istema tooling and fagor dro & scale
I was going to go for curved nuts as the only material I have is Ali (cast iron would have been a lot better) so want to maximise contact area
Looks great till you put a rider on top.
Then it just looks unfortunate.
danielfalck, aye they are
no ballscrews or anything just high friction trapetzoids or whatever they are called
anybody know of a good company to buy stainless pots and pans that are not made by commies?
danielfalck, high friction is a cause of it as i cant move the shafts by hand if the motors stall and i turn them off
All Right Now the weekend is here
MrSunshine: wrong daniel
sorry danielfalck =)
tab-fu not working too well
and my memory doesnt serve me well :P
what is the difference between 304, 316, 18-8, and 18-10 stainless?
I have worked a lot with 304 and 316, but looking at cooking things, it seems many of them are made of 18-8 or 18-10
WalterN, more acid resistant or something +
316 I thought was the best for that
They are different ways of defining the spec.
304 is ferritic and 316 is austenitic.
but the 304/316 numbers are a different way of saying the same thing as 18-8 and 18-10
Like EN24 is 807M30
Look them up on www.matweb.com
That gives a lot more info than will fit in an IRC chat.
is 18-8 and 18-10 more like a class, and 304 falls under 18-8 or 18-10?
I did 10 years as a post-doc metallurgist and still don't know the diferences without looking it up.
just when I get my pots and pans, and decide to distill hydrogen peroxide in it, dont want any reactions going on
304 is often used
No, the 308/304/316 is a parallel and different definition scheme to 18-10 etc. 18-10 means 18% chromium, 10% Nickel I think (or the other way round) whereas 316 is a spec that might well mean the same thing, but is on a different standard
if you are distilling hydrogen peroxide, let me know so I can be sure not to be around :D
ds3: I might make a distiller later on for rocket stuff
hydrogen peroxide is really good stuff
one of the best
only a couple other things are more reactive
WalterN: while you are at it, whynot boil up a batch of HF ;)
liquid fluorine is one of them
Good use for Peroxide: http://www.bloodhoundssc.com/
andypugh: I would use it for http://tiwake.com/rocket.pdf
Going back to metallurgy, I was once analysing an industrial process that involved quenching red-hot steel into molten sodium hydroxide. I asked them why they used that, and they said they thought it was because it was cheap. I looked at the specific heats and infra-red transparency numbers and could only find one other thing marginally better. That was a mixture of sodium fluoride, lithium fluoride and potassium fluoride. W
decided to stick with the caustic soda.
WalterN: Bloodhound swaps the 3000psi pressure vessel for a V10 engine.