I could use some help with gcnccam...
hello, i just heard about this channel
any luthiers here ? (guitar makers)
hmmm. I don't know that anyone here makes guitars
or other musical instruments, for that matter
i attempted a violin top/back by hand ...cnc looks very interesting
it would be fun if i had a bigger machine
if you're talking about scrollwork and inlays, you'll want a very precise machine
i dont think the vacuum table at old job would do the planks for guitars well
ppl here do home brew machines though ?
desktop mills too
it's usually either homebrew or retrofits
i had an idea for anti-backlash nuts
tho youd prob be limited to neck work with something like that
or conversions :)
fiddle tops look doable from what i have seen
swpadnos: theres two people in another chan im in building homebrew setups
oh sure - people do it all the time, just not a lot of homebrew in this channel on a regular basis
linear rails, ballscrews and MDF
one just finished, hes doing PCB milling on his
there are also the folks building their own servo amps and stuff (here and elsewhere)
i am going tyo go w/ steppers
stpetenick: steppers and step drivers are pretty cheap
you can get very good results you just have t stay on top of it
yup ...hobbycnc pro looks nice
once you have everything dialed in and get comfortable with speeds/feeds theyre very reliable
guitar bodies you need a decent Y, so yeh youre prob better off going homebrew if you dont want to drop closer to $10K on a machine and probably conversion costs/time
... i assume it's not much of a problem feeding linux text based g-code from a windoze machine
gcode is gcode is gcode
you have to make sure the line endings are correct
its just text and linbreaks, basically
does mach choke on *nix text?
thats a bit sad =(
ahh, if i could only do the molds in cnc, it would be great, ... stacked mdf
install the package "tofrodos" when you get EMC2/Ubuntu installed, and you'll have a program called "dos2unix", which will convert for you
and unix2dos, in case you need it
i thought so
im pretty sure emc handles dos files ok
tho im not sure i guess
I think it doesn't actually
yeh cuz i do cam work in windows
but from a mingw app =\
dunno if its outputting dos files or not
there was an email on the user list from someone who had edited in notepad, and he was having problems which I believe ended up being (partly) a lot of ^M characters in his file :)
you can sent the files to emc though no prob ...?
since it's on Windows
networking shouldn't be an issue. I routinely connect my Linux machines to my Windows 2000 workstation and move files around
because i think when i vim or nano or whatever them, i get a [DOS] flag in the status files
just use dos2unix first and everything will be fine (assuming you have good G-code :) )
yeh tru that
ok, very cool
i wonder if pcb photoplotters care about rs274x linebreaks
eagle prob outputs cam files the same in w32 and nix, anyway
night time for me. good night
i have to go also, i just heard about this channel and had to check it out
bye all, cool channel
[Global Notice] Hi all. One of our larger client servers just dropped off the network for a few minutes. It's back now and hopefully stable, sorry for the downtime and thanks for using freenode!
a-l-p-h-a is now known as a-l-p-h-a
some good us military design guides http://www.bjg-design.com/designbook/start.htm
FLOAT - a 32 bit ﬂoating point value, with approximately 24 bits of resolution and over 200 bits of dynamic range.
what does this mean in non-geek english?
it takes up 4 consective bytes in memory. and is a really big number with a lot of decimal places in front and behind the dot :)
not an infinite number in front or behind, but a lot
and the float means, the posn of the dot moves, and where it is specified in the 32 bits, leaving less for the infront and the behind values to work with.
you can divy the rest up in fornt or behind, as you like , but, keep it all inside those 32 bits. so its limited for some math, but we think good enuf for cnc.
BigJohnT: "24 bits of resolution" means that there are about 7 digits of precision
so you can store 10000000 and 10000001 as distinct values in a 'float', but not if there's one more zero
did you take high school chemistry or physics, to learn about exponents? 3.0 x 10^25 and all that?
then "200 bits of dynamic range" is harder to explain
it means that the biggest possible values are very big, about 30 digits if you wrote them out in regular numerals .. and the values closest to zero can have about 30 zeros from the decimal point to the first nonzero value
so a float is stored as an exponent number?
is it very precise near zero ? and less precise when the 'whole number' gets real big ( like the 1000000 can not have loads of decimal places after it, while the number 11 can have loads behind it )
thats the 'dynamic range ' part
ok, that makes sense
and yes the computer stores them in a kind of exponential notation, similar to the 3.0x10^25 you might see in scientific contexts .. except with everything based on 2 instead of 10
there are a few bits of this article that are written for a non-geek to understand: http://en.wikipedia.org/wiki/Floating_point
LOL I was reading that :)
hmm is there something I don't know? Results 1 - 10 of about 137 for "it's 2009 now". (0.10 seconds)
must be new math
probably missing digits for the required precision
so 2008.12 turns into 2009
ever look at the dashboard clock, see 10:01 and think "it's only 9 oclock" ?
but more often then not it's "shit it's 03:00 not 10:00"
archivist: was it you spending time in #mysql ?
archivist: if so .. can you join #cia, maybe you can be of some assitance with some mysql config issue BearPerson is having
Welcome! EMC (Enhanced Machine Controller) is a linux-based opensource CNC control. | Latest release: EMC 2.2.8 | http://www.linuxcnc.org
alex_joni has changed the topic to: Welcome! EMC (Enhanced Machine Controller) is a linux-based opensource CNC control. | Latest release: EMC 2.2.8 | http://www.linuxcnc.org
(packages for ubuntu dapper are not quite ready yet)
Now installing 2.2.8 on Hardy! THANKS you guys!
mshaver: let us know if there are issues
alex_joni: This is a _release version_, what could possibly go wrong?
(I'm told the dapper packages are ready now too)
OK, one problem. motion.feed-hold doesn't stop feeding during homing. If it matters, this is a machine with HOME_SHARED and IGNORE_LIMITS_DURING_HOMING. I don't know if this was any different in 2.2.7, but I was fooling around and discovered this now.
mshaver: I doubt it's different from 2.2.7..
would take a patch to fix it, though..
I doubt it's different too. I'm sending out some software to a couple of guys. They'll likely never notice it, but I think it's something that should be fixed in TRUNK and included in 2.2.9.
I've just been giving things an extra critical eye lately.
that's always more than welcome
(the critical eye part)
critical eyes (and good bug reports) is very valuable :-)
seb_kuzminsky: Now that I've got my previous task done (getting software ready to send out), I'm going to collect some data on the ferror problem.
mshaver: if your asking to cruise faster than your stepgen timings allow, that might cause the ferror you're seeing
or faster than your stepgen.maxvel allows
ok i'm outta here, ttyl
* alex_joni is off to bed
good night all
so.. Know why the vacumm pump quit last time. You have to keep oil in it.
* alex_joni is gone figuring
[22:18:17] <skunkworks_> http://cnczone.com/forums/showpost.php?p=538614&postcount=16
skunkworks_: you can have negative TLO.
[22:26:29] <alex_joni> http://sourceforge.net/projects/tkbacktracer/
(if he could motorize the knee he'd be in good shape)
hm, weather forecast for tomorrrow says "much colder"
darn, I thought it was supposed to be warmer