jmk having to redraw my cheat sheet stuff makes me think I should find a cad program from the truetype-and-laser-printer age instead of the pen plotter age
but that would probably mean windows, unless I'm very lucky with wine
your doing this in autocad 12 arn't you
it's all I have
:) that is probably what I would do also
I'd have to give up my autocad knowledge - I'm pretty good with it
but I also don't want to jump to something that requires me to find a windows license
Doing acad for 5+ years running a laser cutter make it very easy to use.
so the telescope tracking mount didn't work out of the box. I ended up having to take it appart and fix the encoder on one of the axis
seems to - cloudy here to actually try it. but now it doesn't go around in circles until it errors
sounds like a good sign
it has like a mouse encoder on each axis.
It will do the 2 star alignment just fine so I think it should work.
does the software know about earthly things like those iridium(?) satellites?
yes - it does
it has like 30,000 objects including asteroids and such
that sounds really fun
it tracks too I suppose?
maybe you could do photography with it
the scope has a camera mount
or a place to mount a camera with an adaptor.
Yes it tracks
pretty small scope though - but it will be neat.
this is it http://www.weasner.com/etx/observations/2005/dsx90-2.html
is it dark where you are now?
no - not yet
um I mean, since your move, does it get dark at your house?
or do you have to go for a road trip every time
The astronomy club uses a flying field
on a bluff
I am in town so viewing isn't the greatest - my parents house is about 20 minutes away and much darker
a telescope is one of those things I think I want sometimes, but I know in my heart I'd use it too rarely to justify it
amazingly, that's kept me from buying one
This was only 'too good to pass up deal'
$90 from sams club... because it was broken. Call meade and had me send in the broken part back for replacement.
haha sams club
I tried the "control program progress with jog wheel" on a real machine (nist lathe)
it is a bit jittery when you turn the jog wheel one detent at a time
when you give it a whirl and get ahead of the program it is nice and smooth
I bet people who like to turn on DTG, turn feed override way down, and watch whether the tool will hit the chuck would also like this gizmo
jmkasunich_ is now known as jmkasunich
jepler: can you go backwards?
skunkworks: it's just a hack that plays with the "feedhold" HAL pin
e.g., 1 click = feedhold set to TRUE for .01 second
sorry - I had to ask :)
oh by the way this was with my AVR USB jogwheel
jogging with it was a little bit uneven but not terrible if the alternative is no jog wheel at all
anyone planning to bring a 'scope?
I figure if one of us was to bring a scope, it should be you
jepler: I think we need to get you a 'vista cruiser'
(I think that's the huge 70s station wagon)
cradek: I'll be bringing a scope
ok I'll leave mine then
(and a current probe, and frequency counter, and a few other handy bits)
yeah, save room in the car for the crap I'm unloading on you
I'll bring a scope or two as well
SWPadnos: did you see the cool 5 axis mill cradek found at HGR?
was it blue?
don't remember the color
it was not-huge, and an interesting layout
I think it did see it, if ti's the blue one :)
I didn't see all that much detail in the photo
[03:08:40] <jmkasunich> http://www.hgrindustrialsurplus.com/search-products/product-detail.aspx?id=20-760-068
dark blue/gray I guess
the color isn't what stands out
unfortunately the price does
ok. that's a different one, but I did see this one as well
interesting. kind of like a lathe/horizontal mill setup
bottom of this page: http://www.barer.com/proteo5.html
shows the axis setup
yep - I
yep - I'm there now
I'm not understanding what the V axis is
it looks parallel to W to me
V rotates around X
ah, W is on the V platform
w rotates around Z or Y, or anything in between
now I see it. the perspective was screwed up for me
(fwiw, new linux-image-2.6.17-rtai3.5 deb in /experimental)
fixes the keyboard problem, nothing else
thats the SMP? or 64-bit?
what is the keyboard problem? I've seen some discussion of it, but don't know what it is.
sometimes while typing you get 400 of a character instead of 1
other times, a keypress is lost
I've had that happen a few time when running dapper in a vm under xp
ah. that would be a problem
it was/is(?) a kernel bug
it just keeps repeating indefinitely, until I hit the same key again - like a key release event was missed
yep that's the one
I assume my case was a VM thing
I don't exactly know what kernels it's in
I'm running stock dapper on that VM
ubuntu patched theirs a year ago, I took that patch
like I said, I don't know all the details
it could be a vmware thing - many possible causes for lost release events, all resulting in the same symptom
not a missing press
though that's still a missed keycode
well, missing press isn't as obvious
if it happens once every several thousand keystrokes, you'll just assume you missed the key or didn't hit it hard enough
missed release is a bit more noticable
SWPadnos: Daniels (effectively) says a proper fusee curve cannot be calculated, and your job as a watchmaker is to make a correctable compromise and then test it and tweak until it's good
cradek: I saw that discussion, interesting
I'm not sure I'm satisfied by that, but it's what you'd end up doing anyway
how critical is "good"?
actaully, it's possible to make the drum have a variable winding pitch
depends on your goal as a watchmaker
so the first example can be done with a custom drum and fusee
semi-constant force on the geartrain is better than wildly varying, and wildly varying is what most mainstream watches have/had isn't it?
these were originally used on fricitional rest escapements like verge, and the equal force was the only thing to give you timekeeping
with modern detached escapements like the lever, it's much less critical
I was assuming escapment technology that was at least as advanced as the fusee
but if your goal is to make a chronometer that varies < 1 sec a day, you may still want a good fusee
good being what? a few percent variation in force over the winding range? fraction of a percent? 0.001%?
a few percent I imagine
as late as WWII hamilton (american company!) made ship's chronometers with fusee and detent escapement - the english style
<- timekeeping geek, sorry
thats ok, its quite interesting
if the book that archivist posted the pics of was online, I'd read it
wouldn't buy it, bet its hard to find and expensive
me too - I don't have it
I have the Daniels book "Watchmaking" which is excellent but more on the practical side
... on abebooks.com for $60+
the archivist one, or Watchmaking?
the Rawlings book is only $35+
more for a copy already in the US though
(abebooks is really great)
would be $50+ to get one here
not bad if you have a serious interest, kinda steep for reading cause its neat
I've paid more for old books, but only when I really want them
sometimes you can get stuff like this through ILL, good to try first
I got the Moore "Foundations of Mechanical Accuracy" book that way
interesting, but not really a keeper
I finally figured out that full thread depth (pointy tool) for UNC screws is always .866 * pitch
I don't know why I didn't see that long ago
in the immortal words of Barbie: "math is hard"
ha I remember that uproar
how quaint what people used to worry about
I hoped you did ;-)
people still worry about or get offended by stupid things
did you see bloomberg's comments about terror plots?
they included "get a life"
don't obsessively worry about stuff that's unlikely to harm you, get a life
he'll never run for president of 9/11, errrr, the US
[03:45:24] <cradek> http://www.theonion.com/content/news/giuliani_to_run_for_president_of_9
lets not talk about politics
I thought it wasn't politics if it's funny, but maybe it's not universally funny
didn't look at it yet
hey I got autocad to use postscript fonts, so I can have nice output now too
well it always knew how, but I didn't
[03:47:35] <cradek> http://timeguy.com/cradek-files/emc/arcs5.eps
your pictures are better anyway, but this is good to know about
yeah 10x better than before
it still shows outlines on the screen, but when I generate postscript it uses the actual postscript font/text mechanism
I built a new smp rtai kernel (but it should have the same options as the last one)
at boot, and after running the "latency" test it doesn't have the lost interrupts problem I saw last time
I haven't run emc yet
... emc locked it up
actually it's not quite dead, I was able to get all this incomprehensible information: http://pastebin.ca/547450
is that the amd64?
that's why all the numbers are big and you've never heard of some of those registers
restarted, and tried disabling the code to run on the last CPU -- it's fine
added the code to run on the last CPU to the rtai latency test -- it's fine
reenabled the code in emc2 -- it's fine
what a pain
and I should go to work
How long is your drive to the workshop?
let me see what google says
google says "409 mi (about 6 hours 11 mins)"
seems like it took longer than that..
maybe that's about right when you exclude the time stopped for a meal in des moines
says 5hr40min for me.
and stopping for gas, waiting for traffic, tolls ...
be we don't go that direction it shows.
seems it took around 5hours
do you drive the speed limit? :-P
it's a lower bound ;)
dad drives - so normally exactly the speed limit
hmmm. google says "1,109 mi (about 18 hours 3 mins)" for me
but for some reason, I think it's longer
jeeze - I typed in gainsville instead of galeburg duh
yahoo says 4hr 40min
[13:14:43] <skunkworks_> http://maps.yahoo.com/;_ylc=X3oDMTExNmIycG51BF9TAzI3MTYxNDkEc2VjA2ZwLWJ1dHRvbgRzbGsDbGluaw--#mvt=m&q2=galesburg%20Il&q1=54661&trf=0&lon=-90.906372&lat=42.508553&mag=11
what are these "tolls"?
for that matter, what is "traffic"?
you new-englanders and your funny talk!
if we went thru chicago - we would have tolls.
and traffic ;)
cradek: jepler: do you guys carpool?
skunkworks_: only at lunchtime
cradek lives out in the suburbs; I live downtown
we come to work from opposite directions unfortunately
I ment for the workshop
oh of course
unless we have so much stuff it doesn't fit in one car :-P
bringing cradeks truck?
no, we can't afford the $2000 it would cost for gas
I bet that would be a trip
jeff's station wagon is huge, it'll be fine
cradek: it's your 600LB server computer that will be killing our gas mileage
hope we can make it up the hills in iowa
I'm sure we can, but going 45 we might get rear ended by the semis booking along at 60
what brand of station wagon?
it's a '78 lime green vista cruiser
cradek is telling fibs
ah - we have a 98 subaru forester... SO how much oil does yours leak?
haven't had a problem
we have pistion slap :o
cradek: which 'etags' did you write the rule for?
I just saw this error running 'make tags' on an ubuntu 6.06 machine:
find . -type f -name '*.[ch]' |xargs etags -l c --append
etags: Unknown option: -l
etags: option requires an argument -- l
etags (GNU Emacs 21.4.18)
lrwxrwxrwx 1 root root 24 2007-06-01 11:04 /etc/alternatives/etags -> /usr/bin/ctags-exuberant
lrwxrwxrwx 1 root root 23 2007-01-08 19:31 /usr/bin/etags -> /etc/alternatives/etags
I doubt '-l c' is needed
didn't we fix this once already?
you could just add - to those lines if you want
doubt anyone will use etags who isn't using emacs
-- top trace is spindle speed out, bottom trace is X position (with motor offset applied; it was actually moving from 1.5 to 0.5 inches from the presumed center of rotation during that trace)
at the end of the trace you can see the maximum requested RPM speed (2000RPM) was reached
yay - so it's done?
the realtime part is
now you just need to get it these numbers, which are currently hard-coded:
css_enable, css_factor, css_min, css_offset
[16:09:08] <jepler> http://pastebin.ca/548029
I'm not at all sure how to calculate css_factor
well that's pretty neat, we've begun the journey of a thousand miles
you snoozed and missed the chance to do the easy part
G92 S3000 (Sets the max rpm to 3000rpm)
G96 F0.25 (Sets feedrate to 0.25 units/rev)
G97 S200 (Sets speed to 200 CSS (typically meters/min))
^^ from http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Lathe_Advanced_Features
why is it not a straight line?
I think the minute should be redefined so that 10RPM is exactly 1 radian per second
I think that would involve making it exactly 62.8... seconds long
isn't r ~ d ~ circumference ~ surface speed
at radius=0 you have to spin infinitely fast
so I figured the speed had to be css_factor / radius
you spin at 100RPM with radius=1, 200RPM with radius=1/2 and 400RPM with radius=1/4
ok you're right
my thinking was pretty fuzzy
would like to become developer. How to begin?
what would you like to contribute?
what's needed? I know G-code, programming, assembler, and some machining. Also have cnc tabletop
how are you using EMC2 now?
Have just loaded EMC2 onto Dell Laptop, and hope to connect to mill Saturday.
sorry, it's unusual to have someone want to be a developer who doesn't have a particular enhancement/project/bugfix in mind, I'm just wondering what your plans would be
Plan to build Bipod mill, and expect to have to modify Hal to suit
for the first few things, we ask a new person to send patches to an existing developer, and if all goes well we give developer status and cvs access afterward
what is Bipod?
I believe I have a copy of 2.1.5 correctly loaded. First time. Unsure
Bipod. Two struts (joints?) driving a spindle in the XY plane
Was there some original EMC development with a bipod device?
I think a kind of bipod kinematics may be used as an example of writing a kinematics module (due to its simplicity) but I don't know of anyone who has actually used such a device.
[22:19:58] <jepler> http://linuxcnc.org/docs/2.1/html/motion/kinematics/index.html
Thanks for the reference. I'll sign off and investigate
alex made a tripod
no bipods that I know of
when do you start driving?
I'm on vacation as of 2 hours ago tho ;-)
tomorrow's gonna be busy
visit HGR, mow the grass, pack the truck
that last one is a major project, since it invilves shutting down and packing up computers and such
I am not sure if chris and I are going to load the car tomorrow afternoon or saturday morning
every time I've loaded on saturday, I wind up leaving late and tired, and arriving well after dark
I'd like to get there in time for dinner for a change