I bet it's 3.3/5V actually
just the pins from the microcontroller, no level shifting
(at least I don't see any 232 chips on mine)
maybe I should look a little closer at the datasheet
or maybe I can wire something else up from some things lying around here
all you need is a max232
that is what I got
no problem then. most of the max232 variants only need like 5 caps
from a DRO a place I was working at tossed out... think the power supply when bad ... it has 2 max chip in em
all 0.1 or 1 uF (I don't remember)
well, you'll want to be sure they have internal voltage boosters
you guys created linuxcnc.org btw?
uh, yes. for some values of "you guys"
heh, pardon SWPadnos
alright. i was just lookin at it
it's great :)
the website or the CNC psoftwrae?
website is not so great :)
but it's ok
thatcalled EMC2 actually :)
ok - if you have specific suggestions, we'd be happy to hear the
just looking at it now :)
and ignore them if they require flash :P
i wouldn't recommend anything flash based.
good for you!
the first stepper I controlled was with the 2003 chip using debug it sucked compared to the using c and gtk until I quit rollen my own and found EMC2
2003. don't know that one
unl2003 I believe
maybe another CMS. ...a wiki...a trac...or something
wiki.linuxcnc.org has the wiki
yep, I know it now
I assumed it was a processor or something ;)
now I am looking into the EMC2 code and ways I can help the open source machining community
nopmop: where did you expect the link to a wiki to be? (so i can put it there)
I am not bold enough to join the developers channel yet lol
fenn: perhaps between documentation and news?
hmm i dont know how to do that
fenn: not sure. what cms is this now? hand made?
fenn: got it. ah right..it's written underneath
i do think the wiki needs to be more prominently linked, right now you have to dig for it
fenn: i noticed..
I wonder if we should just get rid of the polls and make the right side into important permalinks
or move news to the right, make quick links the left, and still get rid of the polls
if i were you, i would set up a mailing-list (if it's not in place yet) and an rss-feed for the news from the site
coden4life: you don't need to be a dev to join the -dev channel
nopmop: we have two mailing lists
SWPadnos do you think the butterfly is a great start for micro controller firs timers?? I have been looking at the pic basic kits and all that jazz for about 2 years now and finally got the AVR..
emc-users, and emc-developers
the butterfly is meant to demonstrate a couple of major features of the mega169 family: the LCD controller and low power operation
jmkasunich: i can't see them right away on the site
it does have peripherals, which is cool
really hoping to stick with the c language ... don't want to deal with assemble if I can help it
was cheap and you get what ya pay for
click on the "contact" link in the top bar
nopmop, see "contact"
SWPadnos: got it
the STK500 is $79 now, and supports most of their chips, and has better breakouts for all the ports
but it doesn't have cool stuff like the LCD and that kind of thing
it has 8 buttons and 8 LEDs (you connect them to port headers if you want to use them), the whole thing costs $79 now I think
and it has a built in programmer, which can program other chips in-circuit
(so it replaces the AVRUSB programmer)
that sounds dangerously great
* fenn suggests a solderless breadboard and a usb programmer
the STK500 costs about the same as that pair, but actually comes with one or two microcontrollers also
[00:17:36] <SWPadnos> http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail?name=ATSTK500-ND
with all this to occupy my mind when will I get time to work on my tesla magnifying transmitter lol
keep the microcontrollers far away from the tesla ;-)
Dumb engineering question of the day:
Can I use a metal lathe to turn small things out of wood?
sure but the chips can get in the mating surfaces and throw the machine off
i would definately put bellows on the ways of a machine
that i was going to do that with
as ever - still don't have EMC2 set up properly
I'm confused, because I did a full reinstall from their liveCD, but it doesn't work
first I had terrible latency issues, which folks in here and in the list helped me track down to the nvidia blob
turning all manner of other things off I'm down to the 12k range if I don't use anything with Flash
if I do, it spikes to almost 40k
but that's all that seems to spike it
lots of windows, large file copies, window movements, glxgears fullscreen, and much else all at once doesn't go much past 12k ever, so I'm using 15k
then I run the config wizard - I've never in 2 years now managed to get the axes tests in there to work
tonight, though, trying from scratch to set things up right, they now error on me
I can open the test dialogs, but when I click Run, I get the same error for all axes
I tracked that down to none of the RT stuff running, and ran /etc/init.d/realtime start from a shell to fire them all up
now I can get into the axes tests, but as always before (2 years now), they don't do anything
I click Run, it stays depressed in, but nothing moves
it was like that even back when I was on Dapper and had EMC2 working regardless
does anyone else have problems with the stepconf axes tests?
I managed to kind of get them to dodgily work recenly by sending values in there all over the place, and way out of sensible ranges
but it wasn't moving them nicely, or smoothly
write your hw configuration of pc and machine
is that an operation, or do you mean you want a list of what hw I'm on?
oh, and also, if I try to run EMC2 now, I can't
I get an error
the second one :)
actually, I haven't managed to get it to work since installing 8.04
different errors now that I got the RT stuff up, though
I'm on a Shuttle SS51G http://walmart.ca/wps-portal/storelocator/Canada-HealthAndBeauty.jsp?selection=listingDetails&page=hb&lang=null&assetId=11727&imageId=41149&suggestedItem=&priceType=1&page=null&departmentId=14&categoryId=193
2GB RAM, IIRC
bought in '03
Sherline driver box, 4 steppers - XYZA
the jog buttons in the axis tests do nothing, too
never managed to get them working
I just did something new
went into stepconf wizard and chose to edit the old setup instead of making a new one
and canceled out after it wouldn't work again
killing the changes
now I *can* load Axis
first time since upgrading to 8.04
but when trying to power up, I get limit errors
e.g. joint 0 on limit switch error
I can use the override limits checkbox and then turn it on finally, but any attempt to move things throws up errors, unchecks the override, and turns it off again :)
if I override, then try to home, it just sends the Z axis off on its way, though it doesn't actually do anything on the machine
the number in EMC2 just starts scrolling
okay, I redid the limits to surround 0 in the stepconf
-4 to 4, e.g., instead of 0 to 8
the limit errors are gone
still no signals to the motors :(
is /etc/init.d/realtime start okay all by itself?
[07:39:19] <gfixler> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?TroubleShooting
"A script is provided with emc2 to load and unload all the realtime modules, and is much quicker for troubleshooting than starting and stopping all of emc2. To use it, type:
it seems emc2 was supposed to fire this up, but didn't
when I did an /etc/init.d/realtime status, none of the rt stuff was loaded, though it was listed
looks like maybe I just don't understand stepconf
having hammered out the other errors, I finally decided not to make my own config file, and just use the step xyz example file
it works brilliantly
I've never seen my Sherline move so quickly
doesn't appear to have lost any steps
next up - diff my ini file with that one to see what I have wrong
I ran the EMC2 AXIS sample file that loads on start
it got through it in about a minute, which is fast for this thing
gfixler: whoa... hold your horses
yeah, that was a lot of data - sorry
right now I'm tweaking scales and directions
axes are moving the wrong amounts, and backwards
that's what I wanted to suggest.. start from stepper-xyz
when you start emc, you can select a sample config, then chose to make a copy of it
I was trying to use the stepconf wizard
that seems to be a broken route for me
stepconf needs modding so it reads the output textfile then it will be more usable
you mean the wizard doesn't read its own .stepconf file?
something I've not yet uncovered: is the TRAJ section an override of the following AXES sections in inch.ini?
why does it have values that are then set again specifically on a per-axis basis?
which will Axis obey, and why?
and will it ever switch for some reason?
gfixler: there are some cases where you want to limit moves in TRAJ
imagine a robot..
the rotaries each move at a certain max speed, but you might also want to limit the max tooltip speed
[TRAJ] referrs to max tooltip speed/accel
so the motors won't spin over their respective axes speeds
but the cutter won't go over the TRAJ limits
so if you have a move from X0,Y0,Z0 to X1,Y1,Z1
you get actually a faster tooltip speed, then any of the X,Y and Z speeds
right, it would be a combination of moves adding up to a greater speed at the cutter
I'm glad to finally understand that
I'm thinking some day I should write an EMC2 For Dummies book
to help the slow people like me :)
did you try the latest docs we have?
probably at least in part
the biggest problem is that there's so *much* documentation!
the wiki is rather enormous
and unfortunately it's a mix of old and new info
many sections outline problems, but don't list solutions, or have one solution that doesn't fit for me
I feel like the problem is that without knowing a lot of the data already, it's harder to make sense of smaller parts of it
like when my programmer friends try to explain mathematical concepts to me, but all of the words they use are from higher maths I've not learned
it's on my long to-do list of things to do - reading the EMC2_User_Manual, the Integrator Manual, and even the Dev and HAL manuals
unfortunately, I have so much else on that to-do list
there is a getting started manual now
so maybe you should start with that
[08:31:21] <alex_joni> http://www.linuxcnc.org/docs/EMC2_Getting_Started.pdf
I don't see it linked in the knowledge base
though I see a Getting Started section
(HW Req, Latency-test, and Installing EMC2)
it's quite simple for me, really
I have no spindle control, no RPM info, no home/limit switches, no spray setup, no feedback to the PC of any kind, no probe...
just 4 steppers for the PC to control
4 steppers==helical gear :)
you mean I can make one?
because that would be pretty awesome
I do on 4 axis :)
takes a bit of time to get it right though
[08:39:49] <archivist> http://nl.youtube.com/watch?v=HAtziCsUj5Q
need 5 axis to save setup time
Lerman____ is now known as Lerman
now contemplating making a trunnion started a drawing last night
gfixler: im looking on your videos
it looked to me like your problem was the clamping not the boring tool ;)
well, it was still a totally incorrect usage of the boring tool
it's supposed to be used to open up existing holes in small increments
you can use boring heads to flycut surfaces just fine.
well, it was actually to counterbore there
trying to make a deep hole
though then you usually stick the bar -------------------^
so this is interesting
the Sherline driver is supposed to do half stepping
when I gave stepconf a value of 2 for microsteps
it generated the scale value of 4000
but to get my steppers moving actual increments
it needs to be 16000
8000 was giving me half distances
1 in axis == .5 in real life
I think the scale value equates to the microstepping
which would seem to suggest that their driver does more than half step
the good news, however, was that with a speed of F1, a move in X from 0 to 3 took just over 1:58 by my stopwatch
so feed speeds seem accurate
that means 8 microsteps per step..
11:11 < gfixler> when I gave stepconf a value of 2 for microsteps
11:11 < gfixler> it generated the scale value of 4000
I'm not sure what 4000 itself means
4000 is steps per "unit"
yeah, steps per unit.
per inch.. or so
16k steps per inch for me/
I don't believe my hardware is accurate to that level :)
but I'm happy to let it try
I'm going to machine at the molecular level
actually, first up is a miniature circular saw blade for a friend's Halloween costume
I don't know why he needs it, nor what the costume is
why not go big and attach it to an exo skeleton? that'd be one awesome costume for halloween... everybody would think the blood on it is fake...
[09:03:36] <gfixler> http://www.garyfixler.com/marcsaw1.png
the inside line is the blade
the outside is my own manual offset
I haven't quite gotten the hang of cutter diameter offsets and tool tables yet :)
hehe "I'm also working on a back-end to this site that takes precedence over the front-end."
I think that note is around 7 years old :)
lol, dealextreme now sells lockpicks too
wow a subscriber!
yeah, I wanna keep up on the excitement, if that's okay
* fragalot sips his tea
fragalot: how's things?
as usual, too busy to take the time to even wipe.
I need a bigger desk
maybe stack another o..... omg thats a good idea, lol.. I'll do that later
gfixler: Already did
by hand, but meh
oh yeah, well done
I remember that
I'm thinking of putting a smaller "table" under my screens
I think when I build my house I'm going to make sure the entire floor is cabinets sunk into the floor
so i can shuv my keyboard under if i need more space
if I want to roller skate, I can just sink them all to floor level
if I want a couch, I can raise a row of them near the wall
that'd be awesome
and each would store stuff
so everything could fit underneath me
insane, but awesome
I don't know why homes don't already feature this
why must I think of everything?
because you need to dig the space out below, hydraulics don't last forever without maintenance,..
what about over a natural steam vent?
still requires maintenance
with a complicated series of rubber bladders
rubber def. doesn't last forever
by 'maintenance,' do you mean more than just dumping oil down there once in awhile?
what if your fridge bladder blows? hmm?
yeah, by maintenance i mean verifying a smooth operation, pumping oil in, checking the valves..
okay, forget that
making sure the hoses you used haven't died yet
large stepper motors
and threaded rods
if you make sure the motors don't corrode, that'd do, but why steppers?
why not just asynchronic ?
I mean, it's not like you'll position it within 1mm accurate o.0
you never know!
I might need a really precision outfeed table
push button, it moves,.. release button, it locks (worm wormwheel)
I like you're plan
wait, don't asynchronous motors need brushes?
which wear out?
could get brushless
I suppose they won't be moving constantly
except on Disco Night
boss did dig out the basement here, has a machine shop[ in it now and a sloping entrance ramp
* fragalot jealous
I've long wanted to dig out my back yard
now idiot is selling the place
I'm on a tiny ~0.2 acre lot in Los Angeles
gfixler: get a dog. :D
with neighbors butted right up against me
I'd like to go 7 basements down to my bat cave/lair
then I could machine all night without waking anyone
gfixler: "tiny" ?
bigger than an apartment
my whole house is probably (including the yard) 1/4th of yours
they dont know tiny in the states
aren't you in an apartment?
my parents are on 33 acres
I used Google Maps to overlay their property on my property and the surrounding neighborhood here
translation: maintenance workers (eg. gardener) required.
then put red dots on the houses that were more than 50% in the guesstimated property line
and counted up the dots
something like 250-300 2-bedroom homes with garages, and small front and back yards fit in the space
and so much of the land around our land is empty forests and fields
empty as in not developed
you know, what you guys call a 2 bedroom house, for us, that means you could move in with 2 families and still have space left for a guestroom or 2
how can you have room for machine shops and woodshops?
^_^ exaggerated :p
I'm so crammed into mine
quite literally can't get to half of it most of the time
have to wheel the band saw over to the wall, then the circular table saw up against it, then the router table up against that
our garage fits 3 cars in a row, then thers the lil' toolshed behind it, small yard, 3car driveway, and the rest of the house
that's TONS of room!
what were you talking about earlier?
I just put the cars out, take all my tools ( all manual tools ) out of the closets ..
that wouldn't work here
plastic craptastic quality racks with doors on it
if you close one door, the air pushes the other open :'(
I can't casually carry this thing out of anywhere: http://www.flickr.com/photos/garyfixler/2905719504/in/set-72157607646207687/
though this helps me wheel it about finally: http://www.flickr.com/photos/garyfixler/sets/72157607928566557/
gfixler: see, the biggest thing I have atm is this: http://www.dewaltdeals.com/Dewalt%20Circular%20Saw.jpg
like I said, all handheld tools.
I'm dying for a 2, or 3 car garage
but I'm kind of stuck here for now
actually i think the router is bigger
that's a big router
gfixler: note, the bikes take up the space of 1 car, and the 2 cars take the rest.
smaller cars over there
I'm in a hatchback, but I think your cars are more like the mini coopers here, typically, no?
and a renault twingo
my router: http://www.flickr.com/photos/garyfixler/sets/72157605513381360/
gfixler: mine: http://www.gijsdehaan.nl/images/Bosch_bovenfrees_11300.gif
I wish LA would fall in love with small European cars
everyone here has some complex and wants Suburbans
ooh, plunge router, nice
that's something I lack entirely
though the table is killer
it's far from perfect up close :p
yes, that, too, but I meant my router table
here's me routing some 2x4s on it: http://www.youtube.com/watch?v=JFdRnNZ8gKQ
I'm rabbeting the edges to slip in panels
friend of mine has that too, but supersized (everything he has is supersized to the max. lol)
bigger than this?
that's pretty awesome
lemme see if i can find something that compares to it
I can't :/ but it's not really a router, it's more of a fixed mill, lol.
('cos its so big >.>)
it scares me.
I have a healthy respect for some of these big tools, too
I don't, all I have is fear. :p
I ran my finger through a circular saw once in high school
cut about 1/16" off the tip of my finger
I had a hard time even using the saw for a few years after that
I did the same thing with a manual saw 2 days ago,... now i don't have a fingernail on my thumb.
I foolishly was pulling a small piece through from the back
and it kicked
and pulled my hand past the blade instantly
no time to react at all
it's always like that
ouch about your thumb
one of the reasons why i love sawstop or whatever it's called.
no blade scares me like a circular saw blade
<-- thats about the size of tools he usually puts on his router.
or a robot that feeds the wood through for you
I like the vacuum clamped in there
and those are Sherline parts
so I know exactly how big that is
gfixler: I just googled that :p
gfixler: what I don't like is cutting a board on a circular saw table thingy,.. nothing that holds it down but you..
that, and I often have lil' things stuck between the blade, and the guide... :p broken a window or 2 that way
you need 3 pairs of safety glasses
I still want to make those goggles you made me imagine the other night
inch-thick Lexan :)
I don't do any circular saw table cutting where I'm holding things myself
ripping is against the fence
cross cuts is on the Incra Miter5000
I've plans to build a few custom sleds
gfixler: Aye, don't always have the courage to take /EVERYTHING/ with you if you go on location to make things..
what's 'on location?'
I think it's easier to ship the location to my lot
[09:46:08] <alex_joni> http://www.techamok.com/forum/viewtopic.php?t=8191
I found a local copy of a video I edited together of so much footage
more than an hour of me working in the woodshop
it's now 27:40 in length
and I disagree with about 60% of everything I did in it
I can never show this video
I'm doing everything wrong
usually like that if you see yourself later
at the time you think it's great
when am I done?
then a week later it's like "WTF did i do here???"
at some point I should be 'awesome'
You are welcome back, anonimasu. :p
* fragalot feeds on some orange chunky goop
I watched "Fringe"
that orange goop is muscle relaxer!
* fragalot falls on the floor
making you the serial killer, uncaught for some 2 decades
invading your kellogs
what did cereal do?
besides provide 9 essential vitamins and minerals
I didn't get a toy last time!
you hate our freedoms!
gfixler: I long for a new ep :p
gfixler: it's not amazingly good, but good enough to watch
it's a bit too fantastic for my taste.
it fills in for my occasional need to sit motionless in front of a box full of blinky lights
I dont have that need very often..
except on sundays when there's mythbusters ^^
less and less so for me these days
too busy with projects
blind driving ftw.
I met 2 of them!
and as ever, my camera was there
[10:21:18] <gfixler> http://www.flickr.com/photos/garyfixler/134708389/
I spotted the mythbusters in several movies and series sofar
it was weird being bigger than Jamie
once in CSI, and then a few others that I can't remember
he's larger than life to me
he was exactly as on the show
nice, but gruff
and Grant was extremely friendly
making sure to learn everyone's name who came up for a pic
and call them by it when they walked away, thanking them for being fans
he's the nice one
he's also the techy geek
i love his creations, lol.
I saw Adam, but he had at least 2 small kids with him who were having bathroom emergencies
when I went up, he was off in the restrooms with them
I don't think any part of his life isn't crazy
I need to get the new episodes of it.
same for adam
I missed the last one
as I were studying
studying is importanter
last I saw was part of the episode where they try blind driving
that's how you learn about words that aren't real
gfixler: "more important"
I'm currently multitasking
fragalot: any latency?
chatting to you guys, eating my orange goop, and studying my french
gfixler: ~.3 sec
drawing up protocol design and irc:ing
I thought you already knew it
* anonimasu puts a nail into canbus
gfixler: Aye,.. I do,.. but still, tests suck
(<-- uni bod)
playing guitar and procrastinating
I do that alot
great minds think alike *grins*
we also saw Rob Cockerham that day
[10:26:00] <gfixler> http://www.flickr.com/photos/garyfixler/134711092/
internet-famous for www.cockeyed.com
I have no idea who that is :)
yeah, he was surprised anyone knew him
or was a fan
my friends knew so much more about him than me
I think they creeped him out
I feel like blowing something up
fragalot: just do it
found ~750grams of gun powder the other day
you find cooler things than me
did you find it on a shelf in a gun shop?
I'm thinking of making a giant oak ball, and then a big fat barrel
you mean turning it on a lathe?
gfixler: no, on an old farm
can old gp blow up?
unless if you light it
uh.. if you ignite it..
I still have some giant wooden balls
from when we played car snooker
my school buddy is in the army
well, it wont blow up unless it's enclosed..
when he was in IIRC Kuwait, he had ammo go off in his hand
large bullet, I think
because it was old
it'll just dissapear in a cloud of smoke and go bang..
anonimasu: thats what it does if compressed too... :p
just more bang.
[10:30:03] <gfixler> http://www.flickr.com/photos/garyfixler/412415264/in/set-72157594573095546/
gfixler: the balls we used for car snooker were ~1m in diameter :;p
snooker balls are real solid :)
gfixler: ofcourse solid :p
it was, but GREAT FUIN
how does one even go about making one of those?
keep rolling a huge log down a mountain until round?
you know the friend i told you about with everything superized?
well... on his lathe
his lathe is that large?
that is most definitely supersized
I can make things about 5" in diameter on mine
and up to ~17" long
that's 12.7cm dia
souvenir baseball bat pens
my own chopsticks
boxes and boxes of toothpicks
the good life
I'm saving a fortune making my own toothpicks
unless if you have a barfeeder, I'd say it's cheaper to just buy them in bulk
and even then
electricity costs more than buying new
except if you run the lathe by a windmill
very high taxes on toothpicks here
which is something I wanna make someday.. windmill.
for generating electricity?
* anonimasu sighs
stupid valve package.
it'll make me hurt :/
shoot it from a distance
I want them with pressure feedback for all ports..
well, of the servo pressure.. :p
so I can calibrate the pilot valves..
are you making my patented elevator floor cabinets?
hmm.. I need a spring tester..
maybe I should just keep calculating/estimating spring wear.. -_-
gfixler: what if we springload those cabinets! for quick emergency access
fragalot: or rapid egress!
just gotta time it properly with the automatic sunroofs
gfixler: then put one under your bed, as an alarm clock
*THUD* WAKE UP! *THUD*
some foo with a dead weight pressure tester
* fragalot puts an egg in a bag, sets it on fire, and puts it on gfixler's doorstep
*stomp stomp stomp*
dude! you were supposed to eat it :'(
nice cooked eg.
*STOMP STOMP STOMP*
is it dead yet?
it's *nom nom nom*
I'm not eating it now
it's all smashed up
yes you are
*nom... nom... nom*
ew you ate it
it's been laying in the sun for 4 days, any longer and it'd have hatched :/
when do we find out if I gained superpowers?
after you get out of the hospital
something to think about while I'm in, at least
meanwhile, i'm patenting your idea.
I have inserted a fatal flaw in the concept
obviously, I fix'd that.
it was recursive in nature
based on fractals
eliminating it makes it stronger
I skipped that part.
well now you just have cabinets
I hope you choke on them
[10:50:29] <fragalot> http://www.break.com/index/expensive_multi_car_accident.html
thats how I like my races.
I *really * hope the more senior/stuffy members of the list read through our part of the chat archives
wow, those cars are designed to explode
"hey look I have a racecar. I have above average grip on the road when it's dry. fear me."
and the visibility is too low for them to tell what's coming up ahead
slicks + wet road == win
gfixler: dude, look better.... it doesn't matter if they ca see it or not xD
this video needs a cost meter in the top corner
gah.. I wonder if I should just do away with alot of stuff and replace it all with a velocity pid controller.
anonimasu: what are you making over there?
machines to make holes in the ground
who needs machines when they have gunpowder?
big onesones that mount to forest machines..
laser? hydraulic? eh o.0
there's almost been laser involved at one point ;)
for position sensing
lasers are capable of creating incredibly precise positioning systems
but ultrasonic works better ;)
except when they're put on consumer tools that I buy
they are more rugged.. and handle dust alot better
crumple zones are there for your safety!
everything with a laser on it is far more accurate when I turn off the laser
that looks survivable
none of my tools /HAVE/ lasers
except for the laser leveler thingy
but it's off
how fast was that crash?
it's made of tin foil
tinfoil can be sturdy.
gfixler: that was slowmotion >.>
if you fold it thr right way ;)
anonimasu: so can paper
yep, that was the point
I've built paper chairs before.
one of my ways of wasting time at work is interleaving the pages of 2 telephone directories together
really fat ones
I'm in the Bs now
once I finish, no force will be able to tear them apart
didnt you study?
gfixler: done that for a wedding present
took 5 thick telephone directories, and interwove them, hiding money in between.
making them work for it
well,.. thats not hte worst part
I had something similar recently...
we also stuffed the house with packing foam peanut thingies
~50cm high, in every room
my dad bought me a lot of savings bonds as a kid
for about 6 years
came to 71 of them
I did a cardboard box epmty but use a scalpel to plate gift in the wall
which I finally cashed in recently
had to write my name, social security number, and full address on every one of them
took me about 40 minutes
my hand was dead for the next day
I wanna re-do the peanut thing again
i think they are still finding those peanuts behind the couch
fragalot: lol - you have the best life
life is what you make it
half an hour before class starts again..
I'm making my life a warning to others
* anonimasu nods
I have class tomorrow
and at thursday I have a chem test..
while signing those bonds, knowing that each time I signed I was agreeing to get $50 or $100
that I'll fail.
I need to think of something epic to do
a thought experiment occurred to me
atm i'm planning on fixing up an old jaguar
if you knew you could make $50 (or local equivalent) for signing your name
how many times would you do it?
wrist and hand get really sore after awhile
but it's a lot of money for just a signature
20k times or so..
if there isnt a cap..
if you do it enough times you can stop working :p
depends on where i sign my name.
I didn't know how much longer I could go after signing 71 times + address and SSN
err, start playing ;)
my muscles started spasming in reverse
get a stamp
so the loop under my y would be above it
then put your signature under it.
yeah, I wanted a stamp, but it was just a one-off thing
then the lady had to go through and do a bunch of work for each one
you could cnc mill it :p
a stamp ;)
I determined that savings bonds in large quantities are a really great way to give someone money if you don't like them, or having to give them money
anonimasu: or just order one trough work :p
they are $$$
the point of thought experiment was that there was a cost to the reward
==the growing pain in your wrist
one thing thats real fun here are the 1cent coins
they are worth more in copper than their currency value
that was the case here as well
but they fixed that
I think during the Great Depression people were filing coins down
making piles of powder to melt down
just melt 'm >.>
they'd only file a bit
so they'd still use the coin for money
but then build up new coins, too
so coins were shrinking
they'd file it down below its value
thats one way to do it...
but it would still kinda look right
but ours are really worth more as they are
people wouldn't think about it and accept them
ours are zinc filled now
starting in 1982
so are you making things in a kiln to sell for more?
euro is fairly new, they never thought about that (back when they were created, copper wasn't that valueable)
now, BigJohnT.. now,... him... y'know... like...
[11:08:13] <gfixler> http://www.flickr.com/photos/garyfixler/sets/72157600719174813/
you file the edge down until you see the silvery zinc
somehow I mixed it up, and took a pre-1982 penny at first
and was filing and filing
and never saw silver
then amid the filing dust, I realized I'm an idiot
fragalot: what are you babbling about :)
I had about 1/3rd of the penny filed away
muriatic acid is scary
I caught a whiff of it and it almost knocked me down
got a very scary feeling of my lungs searing and boiling away
muriatic acid is code language for hydrochloric acid
I like to keep a couple gallons of it lying around for intrigue
that's still nice acid..
only acid i have is sulpheric acid
for car batteries
hydroflouric acid is the shit.
is that the one that can strike you dead just from looking at it?
if you get it onto yourself, get the proper stuff for neutralizing it..
dont try water ^_^
it eats ceramics :)
Well,... class time! cya in ~5 hours
[11:24:35] <anonimasu> http://www.elec.qmul.ac.uk/staffinfo/eric/qmwweb/hydroflo.htm
bedtime for me!
take a peek at that :p
it's the nasiest stuff I've ever read about
other acids seem cute when compared
I'm looking at injuries now
[11:26:01] <anonimasu> http://en.wikipedia.org/wiki/Hydrofluoric_acid
I feel bad for the brave people who discovered it
and quickly perished
or became swamp monsters
I wonder if the pen I ordered have arrived today
I'm contemplating turning a pen in my lathe
I don't know much about it yet
I've been digging through rockler's site for awhile
and they sell tons of pen blanks and kits
[11:28:53] <anonimasu> http://www.de.ufpe.br/~cribari/lamy_safari.jpg
that I bought
I don't have a particular thing for pens, but I do have a lathe, and it seems a fun project
though relatively cheap..
looks like a spy's tool
the white ones are much cooler :p
[11:29:56] <gfixler> http://www.rockler.com/CategoryView.cfm?Cat_ID=2508
[11:30:00] <anonimasu> http://inkbread.files.wordpress.com/2008/01/lamy1.jpg
they have way too many blanks http://www.rockler.com/CategoryView.cfm?Cat_ID=2513
* anonimasu nods
that white one is being a ninja in that picture
it has this storm-trooperish look :p
well, I dont care for looks, I hope mine writes well ^_^
what if it's too cool, and you don't pay attention in class?
haha, it's just a pen..
seemed pretty cool, though
pen?, whats wrong with a keyboard
oh, it's hard drawing stuff with a keyboard..
I think were I back in school now, I'd try to get the professors to let me dictate notes into a pocket recorder
then I'd repeat what they said as they said it
maybe critiquing them as I went
cnc engrave a stone tablet
I've wondered about that
but not for awhile
I've set my mind to getting my handwriting readable too :p
when I first got the mini mill, I was hung up wondering about all that I'd be able to do
and engraving stone was one thing I was curious about
well, more like grinding stone ;)
would be fun to make stone gears
I'd want to find a stone that would mill uniformly
not shattering and chipping the whole time
[11:36:26] <anonimasu> http://www.youtube.com/watch?v=ZIK1_8WJBNc&feature=related
I bet water is sort of a requirement
I have a dry setup
* anonimasu nods
I could just pour buckets on it and mop up my wood floor later
brb eating something :)
well, I'm quite excited to have EMC2 back up, and seemingly better than ever
I'm getting feed rates higher than ever
owing likely to far better values set in at all levels
lewin1 is now known as lewing
heaven help me, skunkworks's renewed work on his big servo amplifier has me thinking about stepper translator/drivers using a CPLD or small FPGA to work with existing integrated or discrete H-bridges. http://emergent.unpy.net/files/sandbox/cpldstep.png
a dumb microstepping firmware would take an afternoon to write, but the programmable nature of the cpld/fpga would mean that one could experiment with advanced features that some stepper drivers advertise
you could sweep pwm and compare instead of parallel adc for less i/o
fenn: besides a voltage-output DAC I'm not sure how to "multiply" the reference voltage by the desired winding current %
* fenn now sees that it's a DAC
i still dont understand that last comment. why cant you just use a transistor to level shift?
vref sets the winding current for a "100% on" winding (this is the pot on most stepper driver boards)
at a "half step" position you actually want to set the winding current at 70% (sqrt(2)) of the reference current
with a voltage DAC you do that by outputting 70%*255=178
I don't see how to do that with pwm, since it swings to VCC, not to Vref
(the number of I/Os isn't that important; all but the smallest CPLDs have enough I/Os .. but getting rid of a whole chip would be nice)
bbl, lunchtim e
my box has proven itself worthy just now
I've spawned over 300 instances of pidgin on windows XP by accident and all that it has done is disable the "comma" button on my keyboard o.0
[17:42:49] <fragalot> http://omploader.org/vdG56/oops.PNG
even when it's struggling to spawn more instances it takes a screenshot without hesitation
and you have 300+ instances of Pidgin why???
SWPadnos: because I left my book on the keyboard.
which kept spawning new instances.
oh. well that explains it ;)
jepler, depending on the CPLD family, you may be able to power one set of IOs with the variable reference voltage. Then the PWM percentages are fixed for a given fraction of the set full current
also, you could use the adjustable reference with an op-amp (as variable gain), and use fixed reference levels
how bout a voltage divider on the output
3-pin trim pot
hm, you defenetively need to decouple it somehow..
even if it's reference voltage it needs to supply a tiny bit of current..
(unless the cpld outputs are protected against overcurrent already
a reference that feeds into an op-amp or two should be fine coming from a CPLD
if the H-Bridge doesn't turn itself off from overcurrent (which I assume because the Isense goes to a comparator then to CPLD), then the reference levels may not be needed
at that point, you can use a fast pseudo-ADC (like fenn suggested), and compare internally
(but a comparator is probably better)
one would think this would come up a lot in cpld circuits and they would have a comparator built in
some do, but not many
CPLD/FPGA are usually used for logic, not analog interface, so it doesn't come up as often as you'd think
other than the lack of free Linux tools, these are just about perfect: http://www.actel.com/products/fusion/
oh, and cost and size
whee my microchip shipment arrived today
~ $170 on samples ftw.
now where did the sample emails from atmel go
looks like it
so the PIC32 is basically a MIPS core with the PIC name?
hmmm. then maybe I should look at them before dismissing the line completely
not worth the trouble :P
the name spoils it all
yeah. it's hard to convince myself to actually buy one
so the question is: should I get a layer 2 switch or a layer 3 switch?
I'm thinking layer 2 is better, but layer 3 may be good enough for my office
layer 3 certainly sounds more impressive (50% more impressive!)
unless I want to play with RTNet or that kind of thing ...
well, it's actually 1/3 less impressive
SWPadnos: 24p or 48p ?
Jymm, yes, 24 + some SFF (shared with the last 2 RJ jhacks)
harder with gigabit
16 or 24 port would be fine
[18:18:59] <Jymm> http://www.linksys.com/servlet/Satellite?c=L_Product_C2&childpagename=US%2FLayout&cid=1169672084111&pagename=Linksys%2FCommon%2FVisitorWrapper&lid=8411195123B09
I also haven't decided how important a serial port is for management
SWPadnos: has traffic shaping and vlan too
yep. vlan was one of the requirements
serial is better because you can always connect, whether you lose the IP address or not ;)
Yeah, IF you hace a serial port =)
as longa s you have the right connector size, gender, and DCE/DTE style connector
or a serial cable
I mean on the computer itself
incidentally, WD Green 1TB drives are the "Shell Shocker" at NewEgg right now: $115 each
now if shipping wasn't $250 i'd get 3.
wht or blk?
if you get the combo with a locking SATA cable, they'll give you extra money too
free 3-day shipping
not the Black Edition, the green ones - low power (like 5W active)
limit 5 :)
I hereby pronounce you linked
err - LINKed
But you should still like do it
oh, are you looking for a link to the hard drives?
[18:30:07] <SWPadnos> http://promotions.newegg.com/shellshocker/20081014/index.html?cm_sp=HomepageTopRt-_-ShellShockr89-_-http%3a%2f%2fc1.neweggimages.com%2fWebResource%2fThemes%2f2005%2fNest%2fShocker_brandBnr.jpg
why is atmel so much pickier on their samplse than microchip :p
I mean all I asked for was a devboard :(
does anyone sample those? (over the web anyway)
atleast you can request them.
interesting. I should look into that
usually they want you to be from an established company before they'll send you anything
impulse buy ftw. I just ordered that harddisk
just one? :)
don't have a need for more nor can I afford more.
I got 5 this morning - should arrive tomorrow
4 for the RAID, 1 for - uh - testing :)
with the cables thrown in, I actually got $3.20 off per drive
before I actually send the payment I'm checking fi they do international shipping for free too
so i won't get screwed over later.
the cables are $7.49, but they're only $4.29 if you buy 5. The combo still gives you $7.49 off that, so I got the drives for $111.79 each delivered
hmmm. they usually don't ship internationally
and it's definitely not free
Yeah they don't
SWPadnos: ship me one for free. and i'll send you 90euro.
hmmm. lemme check the exchange rates ;)
too bad it wasn't on sale Friday - my sister just went to Germany last night (cheaper shipping from there)
I can't send these to you. I "need" them! :)
jymm, that switch is $650, which is a little higher than I wanted to go
I'm trying to figure out if it's "that much better"
so... anyone here interrested in a Sun Fire V60x?
that's what, about the speed of an AVR32? :)
dual intel Xeon 2.6Ghz
ok, dual AVR32
2GB ECC ram and a 36GB SCSI drive.
does it have a parallel port?
if you put one in...
(or have you already checked the latency and found it crappy?)
no the power bill is just too big for me to keep it running 24/7
400euro/month == insane.
400euro for electricity costs/
fenn: includes gas.
um.. i dont get it
like for cooking...
natural gas... y'know.. when lit it burns..
oh, i see. i thought you meant the computer ran on gas
some places combine "utilities" onto one bill - electric, gas, sewer/water, trash ...
for comparison: my uncle also pays 400 ...... but for him it's per year.
* alex_joni heads to bed
good night all
SWPadnos: there is one that's $450
I have a few in a comparison window at NewEgg
ranging from $230-ish to $400-ish
this should be fun
attempting to solder a 150mil SOIC EEPROM to my lil' PCB
wow. that looks almost as good as
I haven't read it all, but I do believe that this (expired) patent includes "decoding quadrature in the buggy way everyone thinks of first" (figure 3): http://www.google.com/patents?id=JUsxAAAAEBAJ&pg=PA3&vq=fig_3&source=gbs_search_s
gotta love most patents
they are so skewy and dodgy that you have no idea if you're violating it or not
I have never built an appakatus in my life
Is the appakatus a mammal?
I think it has a pouch and lays eggs.
* fragalot hands jepler a chickaroo
hm, according to the internet that's a fictional candy similar to a rollo but with white chicken meat instead of caramel. I'll pass.
(see also: crunchy frog)
jepler: did you see the last page or two? that's interesting.
(10% off $99+ order from enco...)
cradek: the "disclaimer and dedication"? No, I hadn't read that far
I did read a patent earlier which had a page of corrections at the end. "On page 1, column 1, line 34, replace "electrochemical" by "electromechanical""
cradek: I'll be happy to help you get to a $99 order :-P
piffle minor difference
cradek: carbide-tipped boring bar sets on sale in october: http://www.use-enco.com/CGI/INPDFF?PMPAGE=47&PMKANO=188&PARTPG=INLMPA&PMCTLG=01
oo that page has the nice keyway broaches
what in the world is a "zero flute" tool? http://www.use-enco.com/CGI/INPDFF?PMPAGE=54&PMKANO=188&PARTPG=INLMPA&PMCTLG=01
they have a hole
it has a hole in it instead of flutes
what's the point of zero flute?
it's a design that doesn't dig in or chatter
I think you pretty much get a chip thickness proportional to the pressure you apply
i have found the 6-flute "chatterless" countersinks dont like being run in a drill press at all (awful chatter)
I bet you should try running them much much slower
i'd have to make a jack shaft
what speed have you been using?
lowest speed, probably 300rpm
300 rpm at what diameter?
I meant surface speed - that's almost 50 sfm, I bet half or a third of that would work much better
5/8 is pretty big
it's worse than i thought - lowest speed is 620 rpm
yeah that's all that's wrong
I bet the zero flute would chatter less, but slower speed is the best fix especially if you're working on steel
the standard 60deg lathe center tool works just fine
still on a 5/8 hole?
i was chamfering a 3/8" hole
oh I misunderstood
Hello All, The other day I mentioned about the posibility of driving a small rotary table directly with a servo. I know this could be a how long a piece of string scenario but here go's. What torque would one need as a minimum torque say in Nm?
depends what the table needs to stand up to
* archivist sitting here drawing up a table tonight
Sure... Light work at most say 50mm dia ali
Paragon: try turning whatever crank by hand and estimate how much force you put on the handle
measure the torque it takes to turn it and hold it against machining forces
with a torque bar?
multiply by something around 5-10
and note added friction that dirve has to overcome etc
torque wrench probably not enough resolution.. if you really want to measure you could use a spring scale and string wrapped around a pulley
That a good idea. .. :-)
I saw something about a one foot pole with a known weight on the end if the motor lift it and holds it pne can calculate the torque by multiplying the length and weight etc. Just dont remember the exact calc.
But I like the spring idea :-)
hint ft lb or nm
ie force distance
Newton = 1kg m/s^2
gravity = 10 m/s^2
you have mass (kg) and distance (lever arm in m); just massage until the units turn out right
yep... thanks guys
google calculator or gnu units can help out
I ve seen a motor that is about 1-2 Nm but I was not sure how strong that was. In a real world CNCapplication.
but are you driving direct or via a worm and wheel
I would like to bypass the work if at all possible due to backlash etc. The table is 100mm dia so is fairly small.
work = worm
not gonna happen
So it need to be geared then.
Im designing worms in, in mine to make sure there is no reverse drive, backlash will be removed with a sprung worm engagement
alos there is speed v torque
The problem also is that the worm feed does not feel consistant for the amount of torque required to turn the table
then poor table assembly / not concentric
didnt someone report buying a direct drive rotary? http://www.dovermotion.com/SpecificProductFamilyPage.aspx?ID=5
Paragon: you might be able to get away with a big timing pulley
Speed is not my primary issue but backlash is more so concerning. Dovermotion I got a quote from them last week.
I think someone fell off his chair at the price
Yeah £3900 from memory ... lol
* archivist wonders what the price barrier is for the amateur/ cheapskate
fenn Im thinking of making trunnions for sale
that sounds like a great idea
but el cheapo compared to haas etc
so you are doing a market study in #emc :)
i'd say put on ebay, lower price until you get some nibbles
heh need hardware first to try on epay
well worst case scenario is you have a trunion table left over
if they are cheaper then 100$
$100 is too low
archivist: keep me in mind.
archivist: actually I dont mind paying quite a bit for one, if it's big enough and you manage to keep the backslash low
archivist: ~500-700$ is sane.. if you make them big enough..
150mm table possibly
hmm.. then 300 is more like it.. :)
steppers built in.....
i'd love it at 300 but dont thing that 3900 pounds is way off target for value ( they're not out to screw you, they have competition )
make it big enough to mount one of those rotary tables from littlemachineshop
rotary will be in it no need to add your own
[20:26:25] <tomp3> http://www.mmkmatsumoto.com/
does anyone know the headers and/or source for this emc kernel ?
[20:27:22] <archivist> http://www.haas.co.uk/tr110.html
archivist: I think you shouldnt make them with motors..
piasdom: you can get them with apt, like every deb package
anonimasu: had to get 6, had to add renishaw ring encoders, got very scared by costs, but theres' no cheap way to do somethings ( really just got scared cuz it wasnt my money ;)
* anonimasu nods
I know the feeling
it's even worse when it's your own company your purchasing stuff for..
does haas build it? ( they are big on bein' all american built , but this is a specialty item )
archivist: do you know anyone who does iron casting?
fenn yes I can get reasonably local 1 or 30 miles
that's pretty good then
bit expensive atm though
piasdom: "apt-get install linux-headers-2.6.24-16-rtai" for headers
piasdom: apt-get source for the kernel source is a little trickier because ubuntu releases source packages that "apt-get source" thinks are newer than the rtai source.
piasdom: you can download it from http://linuxcnc.org/hardy/dists/hardy/base/source/
(get .tar.gz and .dsc file, then use dpkg-source -x <packagename>.dsc to extract)
(that's assuming you're using ubuntu hardy, I didn't see whether you said)
anyone know the headers and/or source for this emc kernel ?
Just this once .. here's the log: http://www.linuxcnc.org/irc/irc.freenode.net:6667/emc/2008-10-14.txt
piasdom: I answered you, you can read it in the log: ^^
i froze...had to restart ksirc
follow that link from logger and you will see what I said
i'm not set to save log
ok thanks...i'll try
hmm - seems that the current limit is working...
I will hook it to the pluto next.
looks like it should work down to 0 amps
would 12Nm have a good chance at holding a rotary table by direct connection ? http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=110277723352
what the hell..
thats like 2500 oz/in ~ right?
maybe 2000 os/in
quite a lot then ;-)
Paragon dont expect full torque if microstepping, nor inter step accuracy
Step angle accuracy is stated at 5% full step, no load.
hmm /me contemplates a fat stepper sitting here
I dont think 200 steps is ok for direct drive
no, not nearly
i bought 3 x controlers and stepper motors an 2 x power supplys from these people cost was around £100 all in :-)
Sure, Thats the problem would need micro stepping but then as you mentioned the torque and accuracy trade off comes into question.
you should gear them alot and run them fast..
I thinking about going with a belt drive and pulley. but then I am sure there will be slop in that system too.
thoose motors are 12Nm of holding torque..
Yep thats a lot right....
and 8 when moving stuff slow..
yes look at the curve torque v speed it will drop rapidly
ideally you should gear so that 4Nm is enough to move your load..
and then spin them as fast as you have to..
contant power woohoo!
pps? pulses per second?
that would probably be steps per sec..
so 4000 pps =~ 4.2Nm at 100V 6A
take the highest value and divide it by the amount of steps per rev..
Thats way fast enough for the rotary table
I have 90-1 worm on my current rotary
1500/50 = 30r/min
dosent that end up a bit slow if you want to use it for contouring?
* anonimasu thinks impellers ;)
That is you use the reduction but what about direct?
depends on the toolpath but yeah
depends on the rotab size, though
you probably need more torque..
* anonimasu cant remember the formula to calculate cutting loads
direct you will probably have a positional accuracy/finish problem
Yeah i am sure your right.
ie what resolution/accuracy to you want
1.8/deg is pretty shitty..
if doing direct drive..
a lot shitty snap end mills shitty
7.2 X 106 N-m/rad
thats the specs for some torque motors
But with microstepping @ 4000 pps or even less to get higher torque?
13 X 106 N-m/rad
microstepping reduces torque..
direct drive tabels are essentially linear motors
that's for torque motor tables..
that means you need 13*10^6 Nm to move the table one radian
well, we cant look at torque motors anyway..
too much $$$$
[21:47:10] <anonimasu> http://machinedesign.com/ContentItem/62955/Torquemotorsdothetrick.aspx
holding torqu also does not say how springy the "detent" is at any step
yep that too
Just been taking a look at the worm drive on the table i just bought... It's terrible...
I think it was made in china though....
* archivist sees proper term on that page "Angular stiffness "
it's better than trying to direct drive a table
that's really what you want to know..
well, and the actual torque when in motion.
toastydeath: did you find that precision machine design book?
we all want to read it
Belt drive vs say a planetary drive (like the gear drives found in electric screwdrivers) ?
anonimasu: NO, they were taken home
anyone who left a book in the thing was asked to take it home apparently
so i just have to buy them =(
* anonimasu nods
I know I'll own them in a few years :)
Paragon: round tooth belts have no backlash
books is a bad habit
on the scale of bad habits
i'd say it's a pretty awesome bad habit
books is an obsession, not a habit
I have it bad
it's a wonderful obsession though
Timing belts do you mean?
gates GT series
toastydeath: that's too bad, I guess we'll have to wait for you to buy it :)
please paypal etc etc
archivist: where' the best kind of place to look for used science/philosophy books
any old used bookstore?
toastydeath, yes, but its a slog and after a while you find the best ones
Hay on Wye in the uk has a few shops
went twice this year
i think we have several "pretty good" ones here in delaware, usa
toastydeath: library inventory dump sales
supposed to be a good one in Stamford uk as well
and amazon has second hand but ive never bought that way
raiding other peoples collections (Lucas and a bereavement) got the bulk for me
i am just looking to fill out some reference stuff and philsophical classics
not really collect
these motor/gearbox are pretty cool:
[22:01:43] <fenn> http://www.onviollc.com/dotnetnuke/Cycloidal/SpeedReducersDOJEN/tabid/72/Default.aspx
Nice ..... $$$$ ??
also with built in servo motor....
i'm geeking out on cycloidal drives lately
* archivist stabs the site catalogue for thinking I run netscape
Netscape ..... Me too :-)
I have a timing belt that i bought from sps by mistake the problem is it like 1.5 mtr in length and not joined. I am looking for a crimp tool of some sought. unless any of you know of a way to join them?
you can splice the belt by cutting off the teeth and half of the tension strands on each end
but it reduces the strength of the belt a lot
Not sure if I follow you fenn...
joint would spoil the accuracy a bit as well
hmm belt cures my last backlash and mechanism folding problem
This is were I purchased them from. The postage turned out to be more than the belts and pulley. Got hit by customs too :-( https://sdp-si.com/eStore
Sterling is sold in the UK by Davall, or was
Sterling ... that a belt manufacturer?
SDP SI SI = Sterling
* archivist has catalogue in hand right now
Oh OK was not aware of that.
here we go: Paragon http://reprap.org/bin/view/Main/AssemblingDarwinMachinery#Z_belt
Paragon, their stuff should be available from www.davall.co.uk
dont forget the most important step: "Make a cup of Earl Grey tea and think British thoughts."
Thanks Guys taking a look now...
bleh /me hates tea, Nescafe Gold Blend
Paragon, btw scrounge the sdp si catalogue from Davall it has a 236 page technical section
Earl Grey ... :-)
archivist: I will do... thanks for the heads up on these and fenn on the splicing technique.... :-)
just found the online catalogue request page on davalls site
and a few other things
cool Just download a pdf catalogue but it's not the same as the real thing....
Download is 180Mb and way to slow...
fenn: Eh, ppl are too stupid
has the Golden Gate been busy lately?
stock market mayhem and all
a heard you got your smoke machine wired
LawrenceG: s/smoke/fog/ Yeah, works pretty cool =)
neet.... I was in the grocery store this morning... it seems it was a bumper crop of pumpkins this year... lots of really big ones
now I just need that cnc pumpkin carver
Paragon, useful site for us brits http://www.bearingboys.co.uk
our new Fidia would do a nice pimpkin - 6 axes
pimp my pumpkin on a cnc
for 500 bucks an hour
* archivist does 4 axis for less :)
naw the cleanup would be a mess the high pressure coolant would destroy the pimpedkin
5axis water jet would do the trick.... it would make a big tub of pumpkin soup
maybe use the thru tool with a 1/8" thru cooland gun drill and use it as a waterjet
Does anyone here have any advice on where to get a replacement lathe belt?
I'm currently using a camera strap.
archivist: How much for 4-axis CNCing?
high pressure coolant isnt really waterjet high pressure ;)
for a pimpkin' i'd split the differance ;)
4200 psi from the pump.. thru a .030" oriffice... im not putting MY hand over it
I've always wondered if a diesel fuel injector could be used for waterjet cutting.
pup to head is 1.5" dia. hydraulic hoses
4200psi is just 300bar..
how much volume do they run... pretty low even on the big ones i worked on
for the huydralics I work with we run at 200l/min
waterjets run at 90000psi btw.. 6 205.28156 bar
ive run all sorts of hydraulic sytems.. constant speed/tension/torque
but we WERE talking a pumpkin here...;(
even 5bar would cut it ;)
gnite.. be well
Curiously enough, diesel injection can manage up to approx. 2,000 bar.
I wonder if you could cut anything with that?
spasticteapot: I wouldnt mess with that stuff..
pressure intensifiers = deadly
WHAT volume SPAS
dmess: Good question.
pretty much big pumps to raise the pressure up to 2000bar :p
and what kindof hose would you use?
anonimasu: I'd take the pump and hose from a diesel car.
many little pistons.. NO volume
dmess: Great big pickup truck....EFFING HUGE VOLUME.
it isnt needed in a fuely pump
Also, those pistons need fuel very, very often.
well, big pump assembly ;)
spasticteapot: I think you are simplifying this alot
at 2000bar things start getting scary.
but its all steel and has NO coorosion resistance ( it was meant for oil) so it'll ROT in no time under pressure
Dieseljet injection, anyone?
im not running it for ya
That said, it's not that hard to find a low-viscosity oil with a high flashpoint.
Turbine grease, for example.
plan 'B'---- exit stage LEFT
some early Canadian Avro tubines could burn CORN pellets...