If you like, a hal command can extract a value from the ini file using something like [A]B where A is the section and B is the name. You do not need to do this, however; you can put the value right in the hal file too.
might want to use better names for A and B
'... is the name you choose.' maybe?
assuming the context is in 2nd person
"All of these files can be read and edited in any of the commen test file editors available with most any Linux distribution."
I'm going to try clicking on them
I get gedit for .hal and .ini
oh that's nice
and .vcp and .var and README
03cradek 07HEAD * 10emc2/src/emc/task/taskintf.cc: recreate the posfile in case it's read-only after being copied e.g. from a sample config
03jepler 07HEAD * 10emc2/docs/src/config/ini_config.lyx: spelling and markup fixes
03jepler 07HEAD * 10emc2/tcl/bin/pickconfig.tcl: make the copied configuration files writable
may... this reminds me of my misplaced childhood... spending my entire time tinkering with computers, instead of playing with toys.
tinkering... fixing software that I broke
Try this address for searching the logs: http://22.214.171.124/cgi-bin/search.cgi
jepler: I guess we attacked that two different ways
cradek: it can't hurt to do both
03jepler 07HEAD * 10emc2/scripts/runtests: provide a way to clean up files left by runtests, and clean up most files (from tests that PASS or XFAIL) automatically
03jepler 07HEAD * 10emc2/scripts/runtests: stderr files weren't being removed
apparently I'm a new find(1) user
03jepler 07HEAD * 10emc2/src/ (Makefile configure configure.in):
the emc-environment script is for use with run-in-place systems. It sets up
PATH correctly to run script like 'emc' and 'halrun', and commands like
'halcmd' and 'iosh'. It also sets up the PYTHONPATH environment variable
so that the emc-specific python modules may be imported
03jepler 07HEAD * 10emc2/scripts/emc-environment.in:
the emc-environment script is for use with run-in-place systems. It sets up
PATH correctly to run script like 'emc' and 'halrun', and commands like
'halcmd' and 'iosh'. It also sets up the PYTHONPATH environment variable
so that the emc-specific python modules may be imported
03jepler 07HEAD * 10emc2/src/Makefile: install halrun
03jepler 07HEAD * 10emc2/debian/emc2.files: put halrun in the debian packages
Some husky mosfets on that thing.
could not fine some .1uf caps to save my life'
in a pinch...
yah - its so far a way from me. well if you think 20miles is far.
Here that would be an hour or so drive...
Pull them out of a scrapped board?
thats what I was looking for. But gave up :)
Hate it when that happens :-(. That is why I ordered 100 from DigiKey, got tired of always looking for those.
I think this is going to be the test board. I need to get some decent copper clad. The copper on this stuff is so thin.
skunkworks: cool, I like the mounting on the cap
that was all jmkasunich
Wider traces :-).
plus if you look at it wrong - the traces comes off.
when's the smoke test?
when do you go into production?
Once I get the .1uf caps
skunkworks: I'd offer you a hanfull, but I suspect I am a bit further away than the rat shack...
I will find some. just have to look a bit harder
They will be in the last place you look, so look there first ;-)
skunkworks: where's that pic of the mill you're building this for?
[01:51:28] <skunkworks> http://www.electronicsam.com/images/KandT/DSCCurrent.JPG
chili peppers are sure a strange background for a picture of a servo amp
yah :) I had to pick them as it is supposed to freeze tonight.
snow by wed
that's funny, I didn't notice the peppers
I heard we might get snow here too, but I don't believe it
but I guess I remember distinctly that we have had snow and ice on the ground before halloween
skunkworks: are you actually going to run that mill with pwm out the parport like my toy?
I don't know yet. depends on how the test go.
(Yes I am cheap)
Not cheap - thrifty :-)
I think it is a neat idea. cradeks lathe on steroids :)
it would be very neat if it works
still need a few encoders.
To test I was hoping to do what you did for the spindle.
if that makes sense
you mean count on the parport too? it'll work if you don't go too fast
I use dividers to get the encoder counts down to a suitable speed
costs you resolution of course
I bet you're going to want hardware counters of some kind
If it works decent - I will probably buy a fpga (mesa?) that would do encoder in an pwm out.
those are really not that expensive.
I would just need to change the pwm + dir to pwm + pwm. ( simple logic)
I think that stepgen already has that mode -- it's called 'up' and 'down' output
and freqgen, of course
or is this some kind of hardware pwm on the fpga?
jepler: right - I mean if I go with the fpga
skunkworks: oh sorry, I'm not paying as much attention as I should
or if you have 6 pwm channels it's easy
I don't know anything about the mesa cards
I really don't know the exact specs of the mesa cards.
I know they do 4 axis out of the box - but I think it is pwm+dir. At least that is what I remember.
2 and gates an I would have pwm+pwm.
atleas thats what I remember talking to SWPadnos a while back.
yes, I'm pretty sure it's PWM+direction, since it isn't bipolar
SWPadnos: did you see jmkasunich handy work? http://www.electronicsam.com/images/KandT/servostart/almost.JPG
(his board design. my bad soldering)
yep - looks nice to me
will you post the schematic/PCB files?
yes - I need to put values and such. I was just using what was the right size pad spacing wise
plus it has to work first :)
well, that is a plus ;)
OK, here's a weird one: when I install the emc2 package, my speakers become muted
it seems to be at the step where it restarts udev...
03jepler 07HEAD * 10emc2/src/ (Makefile configure configure.in): configuration installation improvements for simulator mode -- simulator now works installed
ok - time for bed. Night
see you skunkworks
what did people do to get banned from a channel like this?
I'm feeling lazy .. but here's the log anyways: http://126.96.36.199/irc/irc.freenode.net:6667/emc/2006-10-10#T03-05-25
anyone here familair with under/over driving leadscrews with timing pullies?
you mean something other than one-to-one drive between motor and screw?
its pretty simple - what do you want to know?
how does torque translate in the ratios?
if I have a 100oz stepper direct drive
like if you have one gear half the size of another?
and a 50oz stepper @ 1:2
is it the same
if you have a small pulley on the motor and a big pulley on the screw, the motor torque is increased when delivered to the scrwe
with a slower max speed?
yep (assuming when you say 1:2 you mean small pulley on the motor)
so the 50oz would have the same torque at have the linear speed on the screw
have any idea how people normally tension the timing belt in that sort of setup?
aside from a moveable idler pulley
sometimes they slot the motor mount screw holes so they can move the motor to tighten the bolt
the only thing I can come up with is attaching the motor ..
cradek, you listening? do you still have an online pic of your lathe drivetrain?
I have an X axis pic - let me look
[03:17:09] <cradek> http://timeguy.com/cradek-files/emc/DSCN6290.JPG
that's a 1:3 ratio
cradek: ... what's "timeguy.com" did you make clocks at some point in time?
I'm trying to build a small 3 axis mill before I get into anything big
and I only have two 50oz and one 60
A-L-P-H-A: I repaired antique watches
A-L-P-H-A, s/make/fix s/clocks/watches IIRC
so I'm hoping to use those at a slower linear speed
and then get some real steppers
ejholmgren, 50 oz-in is pretty low, even for a very small machine
My favourite watch died on me... I think the capacitor in it died... I had it for like 7 years... quartz movement, "guess steel" collection... wasn't super expesnive... but died. :(
you'll need to be very carefull to avoid friction
no $ for ballscrews yet, hence the cheap a** steppers
ejholmgren: that mount took me quite a bit of effort to make and I had working machinery to use to make it... a simpler mount and a larger stepper might end up saving you money (and frustration)
how come I can't connect to timeguy.com?
I was thinking more about having and oblong hole in the face ofthe x and y axis
and then making a plate out of aluminum with the motors facing outwards
and then slotting the bolts for that so I could tension them
A-L-P-H-A: don't know, I'm talking to you from it
I'll have an old shopsmith mark v in about a month, so I think milling the plates with that should be feasible
I tried www.timeguy.com no go.
other sites seem to work
no dns or connection refused?
pic worked for me
yeah, I can't route to it.
I just tried to ping www.timeguy.com
main page comes up too
A-L-P-H-A: must be you (or in between of course)
try with no www.
alpha@workstation:~$ ping www.timeguy.com
PING outpost.timeguy.com (188.8.131.52) 56(84) bytes of data.
--- outpost.timeguy.com ping statistics ---
47 packets transmitted, 0 received, 100% packet loss, time 46021ms
alpha@workstation:~$ ping timeguy.com
PING timeguy.com (184.108.40.206) 56(84) bytes of data.
www.timeguy.com is fine (I'm no amateur sysadmin :-)
--- timeguy.com ping statistics ---
10 packets transmitted, 0 received, 100% packet loss, time 9012ms
cradek: np... must be somewhere in between.
comes up for me... http://timeguy.com/cradek/
quicksilver:~/Music/iTunes ejholmgren$ ping www.timeguy.com
PING outpost.timeguy.com (220.127.116.11): 56 data bytes
64 bytes from 18.104.22.168: icmp_seq=0 ttl=55 time=49.238 ms
64 bytes from 22.214.171.124: icmp_seq=1 ttl=55 time=346.5 ms
64 bytes from 126.96.36.199: icmp_seq=2 ttl=55 time=140.027 ms
64 bytes from 188.8.131.52: icmp_seq=3 ttl=55 time=53.503 ms
64 bytes from 184.108.40.206: icmp_seq=4 ttl=55 time=41.005 ms
64 bytes from 220.127.116.11: icmp_seq=5 ttl=55 time=42.876 ms
--- outpost.timeguy.com ping statistics ---
6 packets transmitted, 6 packets received, 0% packet loss
round-trip min/avg/max = 41.005/112.191/346.5 ms
al gore must have disconnected one of the tubes somewhere ;)
ejholmgren: what pitch of screws do you think you'll use?
hmm, even 100 oz-inch might not turn that
maybe 1/4-16 or even 1/4-20 might be better, jmk do you know?
smaller dia would be easy to drill out later
it's the easier pitch that will let you move some mass with the little bit of torque
1/4-16 acme is cheap and available, it's what I have on my little mill
cradek, actually, non-ballscrews are counterintuitive
they are rarely more than 20% efficient, so the linear force reflected to the screw by the pitch is only a fraction of the total torque required
and pitch changes therefore result in little torque change
the dominant load is friction force (linear force * friction coeff) times screw radius
don't listen to me, ejholmgren
so smaller diameter is the best way to reduce friction torque
I'm aiming for something like 10" x 20" x 1-2" xyz
maybe jump down to 3/8" ?
does it matter how many threads in your nut?
not in a first order analysis
coarse and fine threads will have about the same friction torque
I still need enough center material to turn down a 1/4" shaft
the coarse one will of course have more torque needed to turn the load
but the percentage of load torque compared total torque goes up
how about 3/8" 12tpi?
have you thought about what kind of nuts yet?
thought about the dumpster cnc ones
are those the zero backlash spring loaded ones?
those will take even more torque because they clamp down onto the threads
how about just a regular delrin nut with a flange?
that might be your best bet if your motors are small
have any leads on a good source?
I have the dumpster nuts on my mill (they work really great) but I have pretty large motors
just noticed that the enco site is down right now
fenn attacked a spare piece of acme rod with an angle grinder to make a tap, and made what seemed to be some nice nuts
[03:56:48] <Jymmm> http://www.embeddedtronics.com/acmetap.html
I got a 1/2 - 10 tpi.
cost me like $120CDN. :(
bloody hell expensive.
I'm in minnesota
so canada isn't to far away
ejholmgren: ... it'll still cost you like $80USD or more.
ejholmgren: mscdirect.com mcmaster.com use-enco.com/useenco.com
if I was just cutting delrin I'd definitely try a homemade tap
ejholmgren: if you're going that route... might as well go for ballscrews...
check out www.roton.com for affordable ballscrews... albeit they aren't machined.
$80 for a nut?
ejholmgren: $80 for the tap... you make as many nuts as you want.
enco is down right now and mcmaster is expensive ... will check out msc
I made my money back on those that tap though... made some solid brass nuts for some people... and they love the nuts, as far as I know.
A-L-P-H-A: you could make your own acme tap if you have a lathe...
I've never done it... but was told it was easy
ejholmgren: what are you tapping? material wise...
if it's soft... do what that guy did in http://www.embeddedtronics.com/acmetap.html
sort of a random question, but what do all of you do for your day jobs?
ejholmgren: I'm a pimp.
Jymmm: get back to the corner, and work your ass off... I don't buy your drugs for free!
isn't that more of a night job?
Those corporate types need stress relief 24/7...
this is taking forever to update my system to a usable state.
my audio still doesn't work either.
an no apache, or mysql, or php5. urk.
the joys of running a linux desktop machine?
well... if I was a normal user, it'd be just the install CD.
but I'm not a normal user...
nor are most people in here.
oh... what's the state of emc2 + axis without magma/RTlinux?
03jmelson 07HEAD * 10emc2/src/hal/drivers/hal_ppmc.c:
Fixed handling of multiple DIO boards
Tested operation with multiple encoder and DAC boards
I remember hearing that it can run in SIM mode now...
03jmelson 07HEAD * 10emc2/configs/ppmc/ppmc_load.hal: added hal gate to make e-stop condition latch safe
03jmelson 07HEAD * 10emc2/configs/ppmc/ppmc_io.hal: added hal gate to make estop function latch safe
hmm... windows gto wiped from my HD completely...
accidentally from a linux install.
hardly any motivation to go back, besides autocad, mastercam, adobe flash... I need VMware to work.
03jmelson 07HEAD * 10emc2/configs/univpwm/univpwm_io.hal: added hal estop latch to prevent automatic release of estop
03jmelson 07HEAD * 10emc2/configs/univpwm/univpwm_load.hal: added hal estop latch to prevent automatically leaving estop
I had XP randomly erase one of my hard drives during an install once
great fun ...
Oh yes. much.
luckily I copied everything over.
that box went back to 2000 just so I can play halo on it
halo on the PC? :(
no xbox here
I go over to a friends house for halo 2...
work was going to throw away an 800mhz g4
so that's the main box now
and a closet full of slackware boxes
I think I just lost my mp3s.
all of them.
you'd better start drinking
and hope you start hearing music that's not there ;)
I have internet radio.
listen to oem?
I think I can get most of it back from my ipod
mr. ipod? you gonna connect and save me?
except they're all named funny
rhythmbox will figure out the names... so okay.
someone should make an EMC machine to do this... http://www.facadeprinter.org/
ejholmgren: I thought so
they just need the playboy symbol instead, if they're gonna do a bunny
anonimasu hey dude!
GUESS WHAT I FOUND!
I'm actually super happy about this.
I found a working G201 gecko in my stash.
So, now I have 6 working ones... and two unknowns.
selling 3 now...
a REV1, and two REV3's...
or are they REV4... who knows.
I'll be trying my spindle tonight :D
really looking forward to it
oh... seen the spray paint stuff...
going to make a box/pocket in something
or maybe a conrod ;)
I have a nice drawing stored somewhere..
are these the airplane screws?
[07:42:11] <anonimasu> http://www.chevroletls1.com/images/connecting_rod.jpg
okie... and machinining it would be what reason? do you have use for it?
because I can
do you really never do anything that's not useful?
hm, my buisness cards are ready
I have cool business cards.
wish I had cooler ones...
made of sheet metal, laser cut and etched.
stainless steel ones.
[07:47:01] <A-L-P-H-A> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=200033851208
[07:49:52] <anonimasu> http://www.jenimattson.com/pages/identity/melvin.shtml
though having one dosent matter if you cant pick locks anyway
anonimasu... google 'bump lockpicking'
A-L-P-H-A: pardon my phrasing.. but that's gay..
um.. rather "lame" not gay..
did you look?
super easy to pick a lock.
I know how bump keying works
requires near zero skill!
it's hardly related to real lockpicking..
it's like thoose guys picking locks with their toothbrushes..
I like thoose buisness cards woz has ;)
I want a metal one, and be like woz!
they're about $2 when you make 10,000 of them.
how much if you make 100?
I saw another place printing translucent plastic cards... those looked g
yeah but thoose are too easy to make ;)
yeah... still cost $$.
I got paper, gloss, that looks like brushed steel...
we were giving them out, and people were trying to open them.
it was cool
oh... looked like a card holder.
appearantly in some places, carrying lock pick tools while you're not a liscensed locksmith can get you in some trouble.
yeah, I keep forgetting you live in a policestate..
wth are you talknig about?
I'm in Canada!
I wonder if Canada is housing any secret CIA prisons, like they do in Europe
hm.. I just called about a dog
[08:38:35] <anonimasu> http://www.kennelgroths.com/eng/Bilder%20till%20hemsidan/ottokruka1.jpg
kinda looks like a large terrier.
a dwarf schnauser
not my favourite dogs though..
I'm not really a pet kind of person.
but thoose are very nice for allergic people
I got the new huydralic motor, now :)
where was I the last time?
bloody eyes just nearly dried up and went blind
I can't remember who's house I was at.
I can't remember...
man... could have been a while ago
gotta remember not to go again.
anonimasu, what are you up to?
or with my life?
you working today? free? play sudoku?
* A-L-P-H-A pokes alex_joni in the eye
you there too??
welcome aussieland person.
good bye aussieland person
A tackle box would be AWESOME for housing electronics.
must go get one.
anonimasu, off work yet? go play in the shop!
3 hours left
* anonimasu longs home
unless you know someone named home. ;)
* anonimasu sighs
are you by any chance really bored?
you ask me... and then wander off.
I can tell when you start making notes on other people's writing. ^_^
I need to get some more work done..
I'm feeling lazy .. but here's the log anyways: http://18.104.22.168/irc/irc.freenode.net:6667/emc/2006-10-10#T12-56-55
skunkworks: you didnt miss anything
he missed me!
Its still entertainment :)
[13:35:23] <skunkworks> http://www.electronicsam.com/images/KandT/servostart/almost.JPG
let any smoke out yet?
nope. maybe tonight. I still have to find some caps - if all else fails I will run to radio sham
ah - right
that's a self made servo controller board?
not that complicated - it is just a great big h-bridge
the plan is.. encoder -> emc2 -> pwm -> h-bridge. (like what cradek is doing with his servo lathe)
can you really do pwm fast enough?
so that thing is good for 20A continuous, and peaks to 40-ish, right? (assuming good heatsinking)
umm... 90s2313 can have some 10mhz pwm.
A-L-P-H-A: I know.
skunkworks: heh, like the peppers :D
I thought he were talking about doing pwm from the pc directly
SWPadnos: I don't know about the peaking part :) but yes.
a mesa card is probably better for the PWM
* anonimasu nods
anonimasu: 20kHZ should suffice
that's kinda easy with emc2
alex_joni: going to freeze here - had to pick the rest of them.
how do I roll up a window in gnome?
the mosfets are rated for 44 amps but as jmkasunich showed me - that is almost imposible with these mosfets.
but I am hoping it will handle a few peaks.
they probably will
The main draw back is how many lines my encoders are.
which I have not bought yet :)
thats not really a drawback
I think cradek: is running 25khz on his laith (.00002 period)
25 usec if I remember right
some_ is now known as some_away
ok - All I saw was jeplers ini which was 20us
thats 20khz :)
yes it's 25usec, scale is 375
375 per mm?
for an actual servo, the encoder count rate will be the limit, I think
for PWM of a spindle, it shouldn't matter much
for software counting definitely
I have /8 or /16 on mine
Thats why I want to play with low count encoders. If all works well I will probably end up getting a mesa board.
can't remember which
I'm excited either way :)
you could buy an encoder that gives you .001 or .0005 inch per transition, and what you get for max speed is what you get
have you figured out what that is?
1000 edge would give me .0003333 resolution
(3 threads per inch)
units ".001 inch * 10kHz" "inch/second" -> * 10
is this the correct calculation?
I think so
10 inches per second ?
I would take that :)
so 3 ips with 1000 edge
I would take that also
wait isn't it twice that? it can count one edge per period
% units ".0003333 inch * 20kHz" "inch/sec"
where your you getting the 20khz
if you can count at 25 or 30kHz, all the better
isn't that 40khz
275 per mm?
% units ".0003333 inch / 25microsecond" "inch/sec"
* cradek waves his hands
should be enough
anyone to keymap the windows key + d, to hide all windows and focus desktop? I can only map the windows key atm.
windows + m
wow. That would be unreal.
at 25us the max feed would be 800 ipm
The servos can't go that fast. But still :)
this will definatly be a neat experiment :)
heh - 40000 / 3000 = 13 1/3 ;)
Even I think I could remember that formula :)
crashed mirc when I did that
of course, you get the 40000 by doing 1/25 uS
err - 1/(25 uS)
can you get a 250 line encoder that will mount to your setup?
I don't have any setup yet :) The plan was to buy the ecoders and make them work
the servos that I want to play with have a tach on the back.. I was planning on making them fit in there some how.
honestly have not really looked much at the encoder side yet.
cradek: are you meaning 250line - 1000 edges?
* skunkworks is still a little fuzzy on the whole encoder thing
yes... google is my friend.
250CPR (cycles per revolution) = 1000 PPR (pulses per revolution) for encoder counters that count all edges
for a reasonable selection of reasonably good encoders at a reasonable price :)
this might be nice to control a mill: http://www.3dconnexion.com/products/3a1.php
[14:33:46] <alex_joni> http://www.3dconnexion.com/
<- front page has a nice animation on that
yeah - those are pretty cool
I'd love to see something that just uses the Griffin PowerMate knob for jogging or the like
[14:34:52] <SWPadnos> http://www.griffintechnology.com/products/powermate/
actually, jmk's hal_joystick driver may be able to put that to use
I'm cheap, so even $45 sounds expensive
I have some little encoders that were made to be volume controls or something - I should try them as jogwheels
they're expensive, but they are actually made of machined aluminum, not plastic
some push in, which chould change axes
and I could make a nice aluminum knob
cradek: are those the ones with about 24 detents per revolution? That's not too many..
yes something like that
I can finally type the euro sign in linux! :)
it would be ok for touching off, but not for general jogging
cradek, that's a ninja star.
not a euro sign to me.
well yours looks like three @ to me
looks like a square to me
cradek typed CURRENY SIGN (U+0084) and A-L-P-H-A typed EURO SIGN (U+20ac)
there's no consensus on encodings in irc
I didn't think I was sending unicode at all
I actually find 16 steps/rev to be enough for most stuff in my (small) lathe
is that the universal currency symbol or something that cradek was sending?
Lerneaen_Hydra, what's the resolution then?
step distance of 0.05mm, and when spinning quickly runs at around 400-500mm/min
A-L-P-H-A: that seems to be what wikipedia thinks CURRENCY SIGN is for. http://en.wikipedia.org/wiki/Currency_sign
I wouldn't want to jog large distances though
the arrows work fine for that
I use the jogwheel for stuff under 30-40cm
actually I like the low res because when doing small moves one can hear each step and one can know without looking at a screen how far you've moved
cradek: do you have 3 spare inputs on any of your parports? That would seem to be the main problem with adding a jog wheel...
ie touch off, then move 10 steps -> 0.5mm
for the mill, yes, the lathe, no
are there three handshaking inputs on a serial port?
cradek: hmm not sure
if so that would be a nice hack
"TD, DTR, and RTS are generated by the DTE and RD, DSR, CTS, DCD, and RI are generated by the DCE."
so I think the answer is yes
nice, so there are 4
you might have to power it, though
Lerneaen_Hydra: what kind of stuff are you going to machine?
yeah you could vampire the keyboard
hm -- you could make DTR 0 and RTS 1, then you're sure to have both voltages needed
assuming you could handle the high voltage
I don't know if encoders can generally run on >5
nice, the MSR byte on the 8250 has all four status bits, so you can read it with one inb
I was under the impression that these little encoders were purely mechanical
I'm sure they are
anonimasu: in the lathe?
just like the old microsoft mice
anonimasu: most stuff, plastics, aluminum, stainless (ugh), various steel types
not only mild steel
cradek: why wouldn't mechanical contacts handle >5V?
oh well that's a good point, duh
I was not thinking specifically about those I guess (I have a real jogwheel too)
The four Hardware handshaking inputs, plus bits indicating that their change in state since the previous read of MSR are encoded as:
uh, is there an openssh log file somewhere with lots of nice logging data?
also is there any way to show all running daemons?
Lerneaen_Hydra: on ubuntu, /var/log/auth.log shows activity including ssh
Oct 9 21:50:10 localhost sshd: Accepted publickey for jepler from 22.214.171.124 port 2853 ssh2
Oct 9 21:50:10 localhost sshd: (pam_unix) session opened for user jepler by (uid=0)
oh, so just grep after ssh?
"ps waux" shows all running processes, including daemons
"netstat -l" shows all ports that are "listening", though it doesn't list the associated process
oh, "netstat -lp" does show the associated process -- I didn't know that
I seem to be having many hits to my ssh box
any simple way to auto-refuse an IP after x failed attempts?
instead of doing that, make sure ssh is only enabled for the accounts that need it, and make sure their passwords are good (or refuse password authentication)
is "only for x accounts" in the config? I didn't see anything when I looked last
auto-refusing connections is a bad idea, always prefer real security when possible
refuse password authentication?
Lerneaen_Hydra: in /etc/ssh/sshd_config, you may want to write something like this:
oh, that simple ;)
will that default to dis-allowing everything else?
If you want to allow more than one user, then usse 'AllowUsers user1 user2 user3' (separated with spaces)
# To disable tunneled clear text passwords, change to no here!
you can do this if you have keys everywhere
what cradek is suggesting is a good idea too, but it can be inconvenient since you have to have a private key for each machine you log in from, or do something with a USB key
yeah it's not what you want if you want to get to your machine from anywhere
that's the point of this machine currently
then at least do AllowUsers and make sure you have a good password
yeah, just make sure your password is strong, and used nowhere else, and only your account is in AllowUsers
strong = not derived from a dictionary word
I've got a alphanumeric with special symbols psuedorandomly chosen
[15:49:22] <jepler> http://www.alw.nih.gov/Security/Docs/passwd.html
8 chars, so probably good enough
both large/small case
and ... don't tell others about it :-)
hm, won't cracklib get passwords like these? 'Choose two short words and concatenate them together with a punctuation character between them. For example: ``dog;rain,'' ``book+mug,'' ``kid?goat.'''
yes, that's old advice, now bad
but if you don't have the crypted form or access to the machine, you won't find it since network attacks are so much slower
AllowUsers <users> doesn't seem to disallow all other users
yes it does
I could still log in with my main (sudo-able) account
This keyword can be followed by a list of user name patterns,
separated by spaces. If specified, login is allowed only for
users names that match one of the patterns
did you restart sshd?
I rebooted the machine (needed to change bios stuff too)
maybe you have more than one sshd_config file and you got the wrong one?
I was looking at ssh_config
shouldn't allowrootlogin be very much no for an open box?
or have I misunderstood the term
yes you should never allow root logins remotely
on your typical ubuntu system, it is a difference that makes no difference, because root won't have any ~/.ssh/authorized_keys and won't have a valid password
and with AllowUsers it's redundant
Stumpy is now known as dastumster
how you doing?
fixin on lurking for a while, listening in, a friend wants me to do a build involving emc2, and the ubuntu
(Kernel):[Linux 2.6.17-1.2142_FC4smp i686] (Uptime):[14:18] (Load):[0.09] (CPUCount): (Model):[Pentium III (Katmai)] (Clock):[499.937MHz] (Cache):[1024 KB] (Bogomips):[1001.76] (Mem):[225/4154M 14[43||||||||||14]] (Total Space):[104.4G] (Processes):
* dastumster is more familiar with fc4, soo, figure I would do a hangtite and jus catch some ideas, and needed conf tweakin
ne problems in the channel with lurkers?
the more the merrier
if you want to try out emc2 without trashing your existing install, you have two choices: we have an ubuntu live CD with emc2 installed, and in the development version we've been working on a simulator mode that runs without a special realtime kernel -- in fact, I have used this on an fc4 machine. You can see how the GUIs look, get an idea of the configuration files, and preview your g-code files.
you can install the OS and emc together with the live CD too; it's the easiest install you can imagine
* dastumster is a sysadmin, I have plenty of boxes to play with
thats why my friend asked me to do it, he's a pretty good machinist
ok -- feel free to ask questions anytime.
have you found our mailing lists and websites?
i've been going through linuxcnc.org since yesterday
thats when he advised me I was doing it
I already downloaded to a server the install, with ubuntu
* dastumster would prefer using fc4, thats the distro Im most familiar with
you're welcome to, but building the realtime kernel can be a big challenge
compared to that, building emc2 is easy
ok, u convinced me to use ubuntu
hmph -- looks like frappr.com reset their database, my entry is gone
* jepler re-adds himself
compiling is ok on fc4, but building.... I was force to try that on freebsd, I delightedly /fsck the box
hum, and most of the entries there are vandalism
maybe it's time to forget about frappr
by cloak they mean vitual ip?
I think alex had mentioned that they stopped using google maps for the pins also, to their detriment
dastumster: yes, if you have a "cloak" then it is shown instead of your hostname/IP address: jepler [n=jepler@pdpc/supporter/active/jepler] vs [email@example.com]
heh - I sense the frappr link about to go away ;)
jepler has changed the topic to: Welcome! EMC (Enhanced Machine Controller) is a linux-based CNC control. | EMC 2.0.3 is out! | Home: www.linuxcnc.org | Wiki: wiki.linuxcnc.org
jepler has changed the topic to: Welcome! EMC (Enhanced Machine Controller) is a linux-based CNC control. | Latest release: EMC 2.0.3 | http://www.linuxcnc.org
maybe add the http://
in front of the wiki link - it's not clickable in chatzilla
I attempted to access the following link, 404ed http://126.96.36.199/irc/irc.freenode.net:6667/emc/
could be y they said unstable?
I'm feeling lazy .. but here's the log anyways: http://188.8.131.52/irc/irc.freenode.net:6667/emc/2006-10-10#T16-53-03
I guess the IP changed ;)
does anyone know of a way to regenerate a new blank home dir with all default settings?
logs from 2004 there, ok
useradd or some such, I think
for muh distro
that command doesn't seem to want to add a home dir for a pre-existing user
/useradd then for yours?
that creates from scratch
Whats a good place to get decent copper clad?
cradek: is it a bug that linux-headers-2.6.12-magma doesn't require the compiler that the kernel was built with?
Depends: coreutils | fileutils (>= 4.0), linux-headers-2.6.12-10, libc6 (>= 2.3.4-1)
this is one of theirs
Depends: coreutils | fileutils (>= 4.0)
just this on the base one
so, I dunno
if the only purpose of the linux-headers package is to build kernel modules, it's useless without the right compiler
but I can't say for sure whether that's the only purpose of the package
we are very busy
got a 10K stainless order yesterday
and theres a 20K order for nice light guage, powder coated work too
very busy all of a sudden
when people start ordering "2000 of these .. and these" ... you start having to think carefully about job times
I wonder how difficult spot welding stainless is?
well, probably easy :)
didnt see spot welding.. though stainless welds nicely
I think you have to use quite thin electrodes
small contact patch and high current
we have "sufficient" weld power .. 90KVA
[18:19:24] <anonimasu> http://www.greenspun.com/bboard/q-and-a-fetch-msg.tcl?msg_id=008g8T
we are tried some tests this afternoon
32 cycles of 8000 amps
how did it end up?
stuck but not great
I think smaller area is needed
more power.. *grin*
the machine is calibrated with charts for mild steel
up to 10mm sheet
water cooled power stages and tips :)
lets say i would know everything about the geckodrive, would it still be economic to buy a gecko rather than build one self?
lets say i had all the components as well
is it the pcb that is hard to make?
the issue is more of a r&d issue..
research and development
but lets assume i aldready knew all the details and had the schematic and stuff
at that point it probably would not be economic.. but that's purely speculative
economic to buy a gecko..
so the gecko is simply stuffed with tons of commersial sensitive details
manufacturing a board of that pitch would require soldermask, and probably a legend as well. you'll pay $100 for bare boards, let alone parts
Stop being a moron..
(I'm assuming 3 boards or so)
Bo^Dick: I think you've begun to realize how much time development of something like a gecko takes.
or shuold have ;)
Bo^Dick: _if_ your time is free you live off your parents and have nothing better to do yeah..
it'd still be cheaper to buy a gecko.
well i'm not trying to imply that everyone should try to build their own anything unless the circumstances would be very fortunate to do so
you would have the problem of acquiring parts in low quantities, whereas Geckodrive gets things in the thousands per month
so you'll be paying 3x their cost (or more) for everything, and it'll likely cost you more in the end
my broken gecko isnt broken.. it's a broken encoder
if i needed geckoperformance and could afford it i'd of course buy geckos
Bo^Dick: wouldnt you be better off working part time somewhere to afford geckos?
then spending time building drives?
it's just my point of view..
but i'm as well learning how µcs work
when i master µcs i could also build frequency conformers and they're really expensive
I paid 1000sek for the one I have :)
though I'm about to throw it out ;)
the price must've fallen really much the last decade
probably not throw out.. but im not going to use it for the mill..
are you talking about VFDs?
a new one is about 3-5000sek..
depending on your spec..
that's rather expensive isn't it
less the one of my servos.
oh yeah. I got two on eBay for about $100-$125 each. one 1 HP, one 3 HP - good ones, too (Allen Bradley and Mitsubishi)
well, I've got to go..
I'll be back in a hour
btw, what does "VFD" stand for?
Bo^Dick: look at blocket for used ones..
variable frequency drive
Variable Frequency Drive
Bo^Dick: regarding the vfd, what kind of power do you need?
Bo^Dick: you should ask jmkasunich about vfd's..
anonimasu... anything new?
A-L-P-H-A: not really
I found out that my huydralic motor has to little starting torque..
not a big deal.. going to solve it tomorrow..
I'm longing until I can make parts :/
how are you going to solve that?
sorry, was on the phone
now I need coffee...
I'll probably put a larger/slower motor there..
and gear a little bit
anonimasu, so is the old motor a waste?
what about torque after start?
not a problem
why not allow it to spin up free then?
like you have to have it sprinning while it's trying to dig into the part.
if I run just the motor it starts..
the motor had to wear a bit before it'd start :)
had to untighten the screws that goes through the casing
and run it for a bit before it started to run smoothly..
I'm just curious...
very very exactly machined..
so it's 'new' and needed to be worn/broken in to work properly.
I'm just wondering if you really need a new motor, or you just 'want' a new motor.
I need a new motor..
current motor is too weak at start up.... correct? What about post start up, does it have enough torque then?
and post start up?
the problem is the initial torque/start torque..
i.e. it won't start to spin?
you'd have to start it yourself, like old Model T fords, where you crank start?
I'm not going that way
I think the problem is because the displacement is too small
but at the same time it's odd..
I ahve a bearing [ ] thingy that comes with the motor..
and the shaft out is 1,5cm..
1.5cm?.. that's small.
it's really large compared to the motor shaft :)
that's three pencil leads only.
oops... 7.5 pencil legs.
2.54cm is a inch..
maybe 75pencil leads
damn... my calculator button doesn't launch calculator anymore
some of the other extended buttons work.
I wish I knew linux better to fix these silly issues.
so it's not tiny at all..
so... how come it wouldn't have enough torque to start up?
pull string start. :D
like on a lawn mower.
too small displacement I think
I'm actually being serious...
but it's still funny to me.
once it gets moving, does it move?
I couldnt get it moving with the spindle..
like have enough torque to cut?
yeah.. if it'd get spinning
oooooooooh.... so if it's by itself, it works... but when with the motor, there's too much mass to start it up. [I only finally clued in]
with the spindle..
that requires more torque to start..
sorry, I just woke up like 30 minutes ago... took a 4hr power nap.
anonimasu, what's the solution now then?
= slow speeds
or are you just gonna gear it up?
larger motor and geared for speed..
these belts? or gears?
replace the original pulleys then.
I actually want to get some new belts.
* anonimasu sighs
they're these red linked together belts.
[20:41:02] <anonimasu> http://www.piesau.com.au/pic/gen3.jpg
that kind of belts
I want this kinda belt. http://www.onlinetoolreviews.com/reviews/powertwistplus.htm
as I don't use timing gears on my mill.
but do on my lathe
going to talk to some people about what kind of motor size I'd need..
im amazed at my timing gears/belts
they are supposed to handle 4kw..
they arent heft at all..
well shit happens..
and always to me.
anonimasu... and remember that the sky is falling all around you.
quit complaining... you have a SCHAUBLIN!
wanna sell and ship me one? :D
I couldnt help myself..
I'll off $2,000 shipped. :D
freak'n apps all seem to be closing by themselves.
* anonimasu draws a connecting rod
schaublins are cheap here
Really? Wonder why
$10 isn't cheap.
err 10K isn't cheap
-Supportsvarv Schaublin 5,5"/500
Pris 5 000:-
what's a Pris to the Canadian dollar?
something like it..
that's only like 700 CDN.
how come your country isn't using the
wtf is that sign
[20:53:37] <anonimasu> http://www.blocket.se/vi/9485048.htm?ca=1_12_s
because we didnt want to
1000eur for that machine
do you guys track the same ratio all the time with the euro?
that's IT for that machine?
w t f.
usually we do eur/10
where would I ever put it though
that's my problem
[20:55:59] <anonimasu> http://www.blocket.se/vi/9436378.htm?ca=1_12_s
think they'd ship it for 5K euro all inclusive?
you'd have to rent a container on a boat
shipping a car only costs $5K from North America to Europe!
well if you could get them to pack it..
[20:57:39] <anonimasu> http://www.blocket.se/vi/9232804.htm?ca=1_12_s
is that an emd?
dude, that's older than me!
need a snack
It works !!!
SkunkWorks_: ! COOL !
(after getting rid of a solder bridge that made the opto-isolator act really goofy :)
SkunkWorks_: gonna share your servo schematics? :D
once I get it straitened out. :)
* SkunkWorks_ is still winging it
I'm right now looking at V-belts... twist lock, www.fennerindustrial.com the powertwist plus stuff
Anyone think these are expensive? I need like 6ft of this stuff... price is in CDN. so divide it by 1.12 to get USD.
twist lock belts?
they aren't cheap
but I like them
jmkasunich: so is.. $6.70/ft a decent price?
does it reduce vibrations a lot?
yeah to both accounts?
it's local... so no shipping costs.
although in my case it was compared to a chinese V belt, which was really bad
dunno about the price yet, checking McMasterCarr
(thats where I got mine)
I recall it was pretty expensive, but don't know how expensive
what size? 3L 4L, etc
my belts are A38 and A30
so I'd need 6ft.
4L is 25.36 (US) for 5 feet in McMaster
or 6.09 a foot if you buy by the foot
+ shipping and stuff...
so... say 32 + shipping... [dunno how much McMaster charges for shipping]
does McM have warehouses in CA?
where as I'm paying $40.18 + tax...
$40 us or ca?
where as I'm paying $40.18USD + tax...
Where as it's $32USD + shipping + $duty brokerage fees
I dunno how bad the fees are
depends on the method of shipping.
could be $25CDN for brokerage fees, and $5/taxes.
I use McM all the time because the warehouse is only 1 day away by UPS ground, I dunno if its the right choice for you
mofo brokerage companies.
sounds like its not
jmkasunich: nah... MSC Direct is pretty good... as they will custom ship via USPS to me, on request.
and they'll price match McMaster.
yeah, so I got some precision drill chucks, for like $80CDN bucks cheaper than local.
get road runner.
wonder would a road runner be tastey...
[23:54:00] <A-L-P-H-A> http://en.wikipedia.org/wiki/Roadrunner_%28bird%29
I wonder would someone get angry, if someone edit a new section to that article...
Flavour - "tastes like chicken when broiled"
or added it to the whooping crane.
Q. Anyone ever call Mariss? He sure likes to talk. :) Very nice guy... but just likes to talk... reminds me of my friend Brad, who's also an engineer... they sound the same too. kind of erie.
yeah, I've talked to him
jmkasunich: know what I mean?