it looks like they've been mising for a couple of days
SWPadnos: thank you
sure. thanks for the bug report ;)
just for that - you are now required to put your local history into the logger. ;)
so - who is excited about the workshop?
uh - I guess I am
SWPadnos: you must be looking forward to the drive
I just have to figure out which vehicle has easier-to-fix AC
yeah that's the best part
yeah - I love that part
are you going to bring coffee and snacks again?
yep, I was planning on it
I was depending on that
coffee, and snacks too
ok, so snacks with the coffee then
yeah, both please
I may even be able to bring chocolate, if I can get one or more AC systems fixed in time
long drives without AC .. reminds me of my childhood
yeah, and most of my adulthoos
I bought a Jeep Grand Cherokee (well used), which came with 10-ply tires
I wonder if it would be smart for someone to bring a big electric fan
apparently, they use 12-ply on semis
very rough - I'm debating whether I shuold change them for the 2600 mile round trip
hmmm. I'm not sure whether heat+fan+dust is better than just heat+dust
somebody should bring a hose - then we can have mud instead of dust
SWPadnos: 11 mpg?
heh - no, I've been getting a whopping 16+ in town
I've also been debating a tune-up
what year is it?
with the gas prices in the midwest, there may be less debatwe
I am hoping we will be taking dads scion
2000, 94k miles
not much to tune up
true - plugs, wires, fuel filter ...
maybe plugs, maybe O2 sensors
I can change the air filter easily enough
I guess our toyota corrola would be good also. But I don't know if the wife wants to be without it.
platinum plugs are $20 or so total
hmmm. I should take the Accord, but I think my wife would kill me when I got back
no point to new wires unless it runs bad in the rain
On the way down last year - the oil pressure lite came on.. (jeep grand chermumble
then there's the minivan, which still runs great, but needs $1500 or thereabouts in bodywork to pass inspection (and gets 25MPG on the highway)
what's inspection? :-)
true - I can leave before it expires, then leavbe the rusting hulk in NY state
hmmm. I shuold get the garage estimate for the van instead of using my own
sell it in IL and fly back
I think I'd take a big loss doing that ;)
you might come out (way) ahead by renting a small car and leaving the jeep behind
assuming you could fit all your stuff in anything smaller
also, any rental car you get here isn't allowed to cross the Mississippi river unless you pay more
(and I need it for 11 days or so, so it's expensive anyway)
You want expensive - rent a car in a different country. :)
been there, done that
I think we paid $600 just for insurance.
try England, where petrol is ~$6/gallon
that too. (ireland)
I actually get most of the insurances from my credit card
I thought it wasn't too bad until I saw it was in liters ;)
I think I only need the 3 pound/day coverage
it was still fun though. more than worth it.
yep - every time :)
the toyota is supposed to get 41mpg highway.
I suspect that depends heavily on not loading it with machinery, and not going petal-to-the-metal ;)
I suspect that depends heavily on lies in advertising
well - 1.8 liter isn't exactly a speed demon. (I think it is 1.8 - maybe 1.5)
heh - and outdated EPA testing techniques
actually we have been getting 38mpg
in our normal driving
Blew me away.
it's funny - I used to get 40+ MPG from a Plymouth Horizon
I got 30+ while towing a U-Haul
I got 23 in the rain and wind at 85mph yesterday
not a great record
that would be excellent ...
for a Hummer
I just check the subaru and it gets about 24mpg (forester)
I usually get 26-31 highway depending on speed
but it uses about a quart of oil a week.
the stealth get any wheres between 5 and 24mpg. directly proportional on how hard it is driven ;)
but have not been driving it as it takes premium
03cradek 07TRUNK * 10emc2/src/emc/nml_intf/canon.hh: first pass at fixing the tool table units problems
03cradek 07TRUNK * 10emc2/src/emc/rs274ngc/ (gcodemodule.cc interp_convert.cc): first pass at fixing the tool table units problems
03cradek 07TRUNK * 10emc2/src/emc/sai/saicanon.cc: first pass at fixing the tool table units problems
03cradek 07TRUNK * 10emc2/src/emc/task/emccanon.cc: first pass at fixing the tool table units problems
cradek: do you remember what your mustang used to get?
that was the smallest engine, remember
(piece of crap)
wife got a job working about an hour away. That is why we needed a better vehicle. Seemed anything domestic got really bad milage compared to the toyota/honda.
plus, domestic cars lose their value about twice as fast, and have terrible reliability ratings
I still smile when I think I drove that mustang for a year and then sold it at a gain
The saturn wasn't too bad. But the first car we looked at was the corrola. So everything was compared to the 41mpg highway.
Corollas and Civics are pretty inexpensive cars too (unless you go for the Hybrid version)
right - 15k there abouts. (last years model)
hmmm. they were a bit less expensive a couple of years ago when we got the Accord
I thought around $13k
still am not used to driving it smooth. The clutch is so light and engages over such a long distance.
* skunkworks_ doesn't remember
I remember it being under 15K
with teh str1pes!
coffee can exhaust?
holy cow: http://www.flickr.com/photos/starwarsblog/sets/72157600262862719/
Dallur: Are you around?
Hey Martin: yup i'm around
How is everything going ?
Hello Dallur, nice to see you.
Im making progress, I hope I soon can make a cut on my next machine
martin_lundstrom: great :)
Now I have trouble with the config, I get a limit sw error on joint 2
(16:09:32) martin_lundstrom: Dallur: Are you there?
(16:11:17) martin_lundstrom: Dallur: I have been testing around abit and I get a "joint 2 on limit switch error" when I try to start the machine
(16:12:15) martin_lundstrom: Dallur: I tried to invert the in signal for the joint 2 in thc.hal but I still get the same error
(16:12:34) martin_lundstrom: Dallur: Any ideas?
I wonder if we will see fenn?
Dallur: Are you at work?
yes I'm at work
maybe I can catch you at a better time, when you dont work?
martin_lundstrom: there might be an issue with the simulator config where it would cause a limit on joint2 if it's not hooked up to anything with a steady off float switch
Martin_Lundstrom: it's fine but I don't have an emc install here though
I connected the thc and i tried both sim and normal thc config
the same problem aperes
martin_lundstrom: I will have to check and try at home
Im about to print your odg file to get a better overview of the system
it's a good place to start, it's the only way to get the big picture
does anyone rememeber the date of last years cnc workshop?
it was sometime last year
2006, I think
in May though
[16:02:45] <jepler> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?EMC_Fest_2006
"CNC Workshop runs from May 15 (Monday) through May 21 (Sunday).
aaaaaaghhh - my eyes!!!
I hate red white and blue web pages with large sections of blinking text
hmm rigid tapping was a topic of the last fest ;)
and with luck it'll be a topic in '08
for some reason - rigid tapping sounds a bit dirty to me.
lol rigid tapping
i have yet to have someone explain to me why rigid tapping is more advantagous in either a production or prototype situation
i'm sure it must have advantages, i'm just not quite certain what they are
compared to what? doing it by hand or having a floating holder?
most of the dudes at work rigid tap with floating holders and don't break any taps
the dudes who rigid tap still break some
maybe that's just some crappy machinery
:) - I just think it is cool :)
with rigid tapping you can peck-tap
which could come in handy
i could see that
if you were stuck with straight flute taps
Doesn't seem like a bad price for 3 motors... http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=150127321150&ih=005&category=78196&ssPageName=STRK:MEFM:RC:IT
5.5A * 0.42 ohm = 2.31V/ph does that seem right?
nice - other than you don't know what brand they are.
and what size they are NEMA23/34/etc
you usually run 10-20(something like that) times the voltage with pwm drives.
Yeah, I just wanted to make sure the voltage wasn't something like 30V/ph LOL
you want the voltage to be low
30*25=You're screwed (750V)
[19:02:54] <JymmmEMC> http://homeshopcnc.com/page5.html
wth, plastic?! http://homeshopcnc.com/page8.html
taig uses PP (PE?) tubing
some people use hoseclamp + rubber hose
:) that is what I did here to play http://www.electronicsam.com/video/MVC-413W.MPG
air tubing works great as it re-inforced. I would thing high pressure hydraulic hose would also be good (cable re-inforced)
skunkworks you used rubber reenforced hose - that's a bit different than using PE/PP/PVC
But if I'm gonna pay $40 for a coupler it better be able to withstand me stepping on it
that thing looks like it'll break if you just drop it
take a look at the mcmasters catalog for couplers
quite a few have plastic parts
It's the type of plastic that I question, not just all plastic
FWIW, the PP/PE tubing works fine
ds2: Try this sometime get some SCH40 PVC pipe, put it on the ground and smack it with a hammer (were a face mask), Then get some grey electrical conduit, and beat it with the hammer like 40 times.
the pvc will shatter like glass, the conduit will just smooth
good hydraulic hose may throw the hammer back at you
ds2: Yeah? Set you tiag with it's PP/PE coupler in the sun for a couple of days and see what happens =)
JymmmEMC: it isn't entirely PP/PE... it just uses the tubes to transfer motion
PVC in a disc configuration might be fine...just not the entire assembly (see mcmasters for a picture of what I mean)
[19:24:34] <ds2> http://www.cartertools.com/mounts.html
this is what Taig does and it is fine
sbailard_ is now known as sebastienbailard
Finally got hotel reservations for the cnc workshop :)
I am not a procrastinator or anything
Dallur: Are you around?
Dallur: Im making progess... UI found a small error compared with the chart. I think it should be: net FloatSwitch parport.1.pin-13-in-not => or2.1.in1 and2.4.in0 and2.5.in1 and2.6.in1 in tch.hal
martin_lundstrom: ahh, I will try to check it tomorrow, about to go to sleep
martin_lundstrom: did that fix the error for you ?
I know the start, end, and another point on an arc in the XY plane. How do I determine if it's a G2 or a G3 arc? Do I need to place an additional restriction or have an additional piece of data to answer this question?
are you trying to go clockwise or counterclockwise around the arc?
just look at the start point, and the end point
and determine if you need to travel in a CW or CCW direction to make the shape you want
from start to finish.
10 LOOK AT CIRCLE
20 PRINT IT IS CCW?
30 GO TO 10
uh, you can have it be either
what I mean to say is, I can look at n arc and "tell" whether it's CW or CCW, but I'm interested in writing some computer code that can tell
look at *an* arc
do you know the radius
sure, I have a formula that gives the center and the radius based on the information I have
g2 and g3 will take a negative radius
which complicates things somewhat
I will probably use the center format when I actually output the gcode
well i was thinking in terms of figuring out which way to travel
like, if we pretend for a minute that negative arcs won't affect anything (and they might not)
you could see which way around the arc that point lies
like if you have your start point, end point, and a point in the middle somewhere
based on which angular direction you have to travel to get to it will tell you if it's clockwise or counterclockwise
I am thinking I can use atan2() to find the angle of each point compared to an arbitrary point: theta_start, theta_mid, theta_end
if theta_mid is less than theta_start, add 2pi; if theta_end is less than theta_mid add 2pi or 4pi as necessary. Now, if theta_end - theta_start < 2pi it is CCW
(it's only ambiguous if end == start, a 360 degree circle)
360 degree circles are bad practice anyhow
yes, I'll prevent them at another point in my program
(but in general I think you get decent 360 degree circles if you use center-format arcs)
some machines have rounding errors
and mill off into space