* jt-plasma listens to Jethro Tull...
anybody know any links for a picture of a topographic model machined out of foam?
hm thatd be pretty cool
I thought so
Valen: I was planning to do that out of bambo
some sort of laminated thing?
Valen: may be in 2 or 3 phases yes
you can get DEM's for free and they are high accuracy
[00:54:50] <Valen> http://www.acelasersupply.com/CNC%20topographies.html
they are simple hight maps (16 bit grayscale)
something like that was what I was thinking
I have dealt directly with the SRTM data
you get get them as grayscale with a resolution of 30m/pixel
I was planning to make pne of Ecuador
I was planning to use balsa (sorry I said bambo before) because I can get that cheap
ahh that makes more sense
I can get balsa here cheaper then foam...
I am new to EMC2 and only have a little linux experience. I'm building a CNC controller for an existing router. The router originally had a propriatary PC controller. My question is about the best way to go about implementing the enable for the servo drives. The sample config I have started with for my Mesa 5i20 seems to assume the drives are always enabled or possibly enabled with a single "enable" line. My servo drives require sort of a three wire sta
you were cut off after "My servo drives require sort of a three wire sta"
..."my servo drives require a sort of three wire start stop. To enable, you make a momentary contact closure between A and B. To disable, you break a contact closure between B and C. How would you go about implementing this type of enable?
an SPDT relay could do that
A to contact 1, B to center, C to contact 2
I'm familiar with ladder. I suppose I could invest a little time in figuring how to get classic ladder to do it. I don't think the SPDT would work due to the timeing being simultaneous.
but there may be too much of a delay between A-B breaking and B-C making contact
ladder could do it, and there are also HAL components that can do edge detect and energize separate relays for a certain amount of time on rising edge and falling edge of the enable
Yes, i think you must have AB closed and BC closed together for a few miliseconds at least.
I think two relays (per servo, or use 3 pole relays) are required, no matter how the internal logic works
OK, tell me about the HAL components that can trigger signals for times on the edge detections. Perfect!
[01:30:46] <SWPadnos> http://www.linuxcnc.org/docs/2.3/html/
there's a section on "Realtime components and kernel modules"
edge is the one that does edge detect, timedelay is the one that works like a time delay relay
hmmm. maybe only oneshot - timedelay is the opposite
I'm looking in the docs now.
oh. edge has its own timed output, so you can just use that
you'd use two, one set to detect rising edges, the other for falling edges
both inputs get connected to axis.0.enable-out (I think - check the spelling)
one output goes to a NC relay, the other to an NO relay, which go to the drive(s)
I'm looking for something called "edge". The section I am in only talks about the siggen, encoder, pwm, etc functions. I don't see anything about edge or timer.
the page I linked to has a section on realtime components - don't follow the link that's labeled realtime components :)
it's about 80% down the page
I follow what you are saying perfectly. Just trying to find out how I create an "edge" object and tie it's function to something to get it executed.
ah, read in the integrators guide, there should be a HAL tutorial
or look through the links in the HAL section of that docs page
here's a good one: http://www.linuxcnc.org/docs/2.3/html/hal_hal-examples.html
Now I found the edge page
I did read the integrator guide. (but only yesterday._ smile)
So let me see if I get it.
yeah. that link to realtime components should be renamed, or all of the components should be on that page
I will loadrt edge
then I will find a function that makes edge execute
I will addf that to my servo_thread
once that is set up, the edge code is executing all the time
so i have to figure out the syntax of the net thing and point a pin from the enable to the input of the edge
there are a couple of parameters to set
then I map the outputs of the edge object to the new gpio pins that I want to physically trip my enables
you can get a lot of help by running halcmd interactively - a lot of this stuff can be done on the fly
exactly, you've got it
I played with the interactive command and the scope so I think I am set with your general info to go start playing (er em I mean working)
same thing :)
Hey, I'm going to sign out. You gave me enough to work on. I think I can get it from here.
Thank you! Thank your~
krushia_ is now known as krushia
[13:31:49] <EbiDK> http://ebidk.blogspot.com/
Guest752 is now known as skunkworks_
ries: please join emc-devel; we are discussing your patch
cradek: will do
[14:49:59] <skunkworks_> http://www.cnczone.com/forums/showthread.php?t=99073
optic! - how is your laser?
still working well
we still don't have any good CAM software though :(
it's all either $50k or total shit
I was playing with SheetCam but it doesn't work right on any of my computers
can't help you there... have you looked thru all the cam packages on the wiki?
yeah, i look through it every couple of weeks
dxf to gcode paths shouldn't be THAT ahrd
I don't think?
one of our members did a usable svg to gcode converter
cradek: great! :)
that will help explain it.
Optic: i thought you were going to entertain the cam route for doing that?
using cam software,,
which would also take care of toolhead size and such
didn't someone have a axis filter for dxf to gcode.. I thought it was almost done. Was that micges_work?
didnt sheetcam accept dxfs as input?
skunkworks_: almost done ;)
:) thanks micges_work
frysteev: yes but I can't get it to work right on any of my machines
it uses some sort of weird windows video api that requires absolutely perfect device drivers
i haven't tried the linux sheetcam
hmmm i think linux cam is needed for the lab
it will also be needed for any future pcb mill
funny - I actually do see nine fixtures there
including the aluminum plate bolted to the table? :)
yep that's obviously a fixture for doing a final outline of the part - you can see the outline and a mounting screw
is that a picture from wichita?
[15:15:01] <Optic> http://kilpatrickaudio.com/?p=striptease
this thing was made using our laser
we do ok with it. :)
so was this:
[15:15:51] <Optic> http://aonomus.wordpress.com/2010/02/01/diy-syringe-pump-version-1/
emc has been excellent
no trouble at all
it's just the rest of the workflow is a pain :)
1/4" acrylic cuts nicely at about 4ips
i prefer mm/beer
at the moment it is ft/coffee
that's G102 feed rate mode
have you looked at modifying emc for rastering?
one of our members does rastering with hal-streamer
[15:31:02] <Optic> http://github.com/jedediah/graster
oh - neat. Does it work well?
I don't know much about what he's done overall
but he makes gcode that does the movement and then a bitmap file that controls the laser
I didn't know anyone had tried it. that is what is always talked about when someone asks about rasterizing. Cool
yep, it does work
yes, most are unusable
these were done on our laser
[15:37:29] <Optic> http://farm4.static.flickr.com/3444/3979220394_c91fa3a29d.jpg
wow - neat. Emc can do everything! ;)
it's pretty cool!
i keep running into mach3 people who dont even know what linux is
it makes me chuckle
how much power can a ordenary cd writer laser put out? :)
the new mocca i/f looks nice. but i didnt know what was happening while it loaded the 3D penguin , i thought it had stalled. very nice work!
mrsunshine, not enough to do anything useful.
dvd writers output a bit more, if you're careful.
MrSunshine: there's a laser faq I think called sams laser faq that tells you that
i was thinking for burning marks etc in wood =)
and the guy that wrote the halstreamer app also has another google code project for emc2 laser http://github.com/jedediah/hacklab-engraver
[16:18:56] <mozmck_work> http://www.repairfaq.org/sam/lasersam.htm
maybe should finnish my ordenary mill before planing to make something new :P
[16:22:28] <MrSunshine> http://cgi.ebay.com/NEW-40W-CO2-LASER-TUBE-CUTTING-ENGRAVING-WATER-COOLED_W0QQitemZ390154831606QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item5ad70a46f6
something like that, is there only needed a power source for it or is something more needed?
i finally got the pic's pwm to give me 200nS rez reliably, but now the range is a bit limited. the bottom end is 200nSon & 400nSoff, but the top end is only 680uS on and 20uS off. i thought i could get longer periods than just 700uSec (~1200hz) well it may be good enough for copper electrodes, and for sure is good enough for graphite.
the beloved repairfaq
[16:30:10] <MrSunshine> http://www.youtube.com/watch?v=sr5U5YlE9Zc
looks like it can be used for surface engraving of some materials =)
still, its neat to just be able to engrave stuff like that
should be enough to cut sticker plastic etc? :)
black sticker plastic, anyway.
might not work on white materials? :)
woohaa, 5axis waterjet :=)
sounds dangerous :P
yeah, white would be more reflective.
although maybe you could "encourage" it by pre-heating the vinyl.
anyone know the mounting hole locations for a 7i33 and 7i37? I assumed it would be in the manual but it is not :/
weekend before last I had the same realization, and I just measured them...
seb says pcw already has a 'feature request' to add that information...
my cards are at home and I'm not :( and I was laying out the holes for my 6061 plate
we didn't make a program for the ones we mounted, we drilled in mdi - otherwise I could tell you
pretty sure I remember 7i37 is on a .1" grid, but 7i33 was something different and random
7i33 is 3.7 X 2.2 on center.
I don't have a 7i37 here at the moment
skunkworks_: is that the outer four holes?
I think the inner four are the same as the 7i37 but I'm not entirely sure
do you need the inner one?
ones (the ones next to the plugs?)
no, I just need the outer ones I assume
this is a cool hack: http://img.photobucket.com/albums/v19/markandannie/tool%20holders/MVC-003S.jpg
that is cool
a thought just crossed my mind to stack the 7i37's to save space on the mount plate... any issues I might be overlooking?
are they the ones with the screw terminals?
yes the TA versions
not sure if TA is different than T - would you be able to get to the screws?
the TA has removable plugs like this picture of the 33 http://www.mesanet.com/graphics/motion/7i33tacolo.png
neat - those are better than the ones I have
of course you can't work the screws if you mount them like you say, right?
they told me that they have phased out the T's for TA's
good, the T's connectors kind of sucked
no, unless I staggered the mounts...
7i33 and 7i37 are the same size and pattern
at least mine are
I bet T, TA, and no-suffix are all different
they dont make t anymore, but possibly
because I know the 33 and 37 we used weekend-before-last were completely different
i have all ta's
one may have been T, the other no-suffix
JT-Work: sounds like you better wait and measure, or maybe pcw will appear and tell you the answer.
no-suffix has the 50 header for the I/O too
yes, measure twice and drill once :)
I'm sure we had 7i37 no-suffix, and I think 7i33T
i just mounted mine on both the lathe and mill, and the patterns were identical
I thought that they were the same footprint
yea at least the ta's i have are
even the 7i42ta was the same
I've got all TA's
we got ours about the same time as well
well I sit corrected
i'd just get some tall standoffs and double stack them if you need the room
maybe we should make a wiki page called 'all you ever wanted to know about mesa mounting dimensions but were afraid to ask'
cradek: well i got a 7i42ta i bought in spring of 09 and it is different
but all my current stuff is the same
they added a 50 pin header to the 7i42 which makes it the same size as the 7i33 and 7i37 now
but all the boards had multiple patters, and they all had at least 1 pattern that matched the others
jt-plasma: do you not have your boards yet? thought you did
they are at home and I'm at the other shop
hey i was working on a cycle time counter in ladder the other day, and i had issues with one assignment block always changing a compare block i was using in a different section
we do most of the design and assembly and machining at my other brother John's shop and fabrication and now lathe in my shop
whatever parameters i put into the one assignment block always changed the values in the compare block in a different section
and vice versa
any idea what i'm doing wrong?
did you make sure they have different names?
that sounds strange
I don't have a Linux computer over here so I can't look and see atm
names? i was unaware that you can name them
maybe thats it.
um, I guess it's a number
the top thing in the properties window
so in your assignment window you have something like %QW0=5 and the 5 is changing?
cradek: the top window in the asignment parameters is the expression
jt-plasma: it changes everything... if it was %QW3=C1.V, it'll put the same thing in the compare block
different sections, different pins, different counters, and it still does it
I was thinking about counters/timers, sorry
i just dont get it
danimal_garage: if you don't get it figured out e-mail the clp file to me and I'll take a look at it when I get home
I'd look too if you're stuck
sometimes it's hard to run someone else's ladder though
i worked on it for a few hours
all i could do to get it to work was get rid of the hour counter
i think i have enough assignment blocks.. the default is 10, and i have 6 (7 if you count the one that doesnt work
oh good idea checking to make sure you have enough of everything
arithmatic expressions are just compare and assignment blocks, right?
I think assignment is the one on the right, compare is on the left
I think math expressions only make sense on the left
i've used math on either side
what does it mean on the right?
I think they're called COMPARE and ASSIGN
i have one that is %QW2=QW1-1
to me it makes no sense to ASSIGN anything but an expression involving =
ok I can see that
compare is the = and assign is > on the editor
other way around
compare is an input, assignment is an output
I should not have so many windows open on all these monitors :)
but as far as arithmetic expressions.... there's something in HAL in the classicladder line that says numrungs=## numsections=## numarithmexpr=## etc........ what is considered an arithmetic expression, just compare and assignment blocks, right?
(trying to make sure i have enough)
man classicladder says [numArithmExpr=N]
(but I have no idea if the manpage is up to date)
yea, i'm typing from memory
figured you'd know what i was refering to
it has numSymbols too; I don't know what that means
the classicladder section of the integrator's manual isnt too in-depth
no info in the manual on the ones that are not intuitive
just looking now
the cycle time counter works pretty well though
i just wanna spruce up the pyvcp stuff a little
i also wanna add a total run time timer and a parts counter as well
usefull for mass production
so... would uvw be referenced to the tool? like if a tool was pointed in an odd direction because of a xyzabc location - you could say drill along w which would be along the tool? (if kins are setup correctly)
skunkworks_: sure, you can do that
you can even switch to G17.1 and use G83 to peck drill along W
you have plenty of axes to use however you want - I think putting one in the direction the tool's pointing is a very useful thing to do - and necessary if you want to use tool length offsets.
well if you let crappy orange wine sit for 5 or 6 years it tastes good now
apparently you can turn MT4 into R8
cradek: how do you come up with this stuff?
surf surf surf
that site is not far from here, hard getting him to convert to emc
I shall keep trying though :)
but a nice idea, we have been chucking drills that size these last few days
you'd think you could buy such a thing
bits that big are usually morse taper
I might not be a qualified engineer, but I reckon that is broken.
so is the pozidrive on the lower left
breaking shit left and right
What is it we
're looking at?
It's a beam-type flex-coupling.
Or, more accurately, an Ex-coupling.
skunkworks_: do you know of a high power version of that? like for a big servo?
1:1 belt I suppose
this one is for jt-plasma http://www.stevenson-engineers.co.uk/files/british%20steel.jpg
cradek: How high a power do you want?
the large servos we had where hard coupled to the leadscrews
[21:18:25] <andypugh> http://www.ondrives.com/couplings-gear-couplings-0-125mm-bores-10-2500nm.html
Up to 2500Nm
Eeek! I just saw the price.
Perhaps one of these?
[21:20:14] <andypugh> http://tsubaki.com.au/pages/PTUC/roller_chain_coupling.htm
[21:20:26] <skunkworks_> http://www.couplingtips.com/servo-couplings/high-torque-servo-couplings/
there really is a web site for everything
I would guess - very expensive.
skunkworks_: I don't have numbers so I guess I don't know
Here they are with prices:
[21:23:13] <andypugh> http://www.ondrives.com/couplings-bellows-couplings-10-90mm-bores-18-5000nm.html
we have some couplers that have 2 sets of laminated shimstock between the ends. I would think that would handle higher torque
this one is hard coupled - but I think something somewhere is slightly bent
There is a reason that my machine has everything driven by toothed belts :-)
is this on the jr?
Perhaps raid the scrapyard for the driveshafts from a FWD car?
they have play
yeah I wondered about that, or regular old U joints
but I'm sure they do have play in them
Not a lot, as that causes clonking noises. Bane of my life are clonking noises. (Not this week though, this week it's combustion noise)
I have some couplings here that could be home made
That was the way I was going.
One simple coupling is two discs with two pins at 180 degrees, and a steel plate with 4 holes. An alternative (and equivalent) arrangement replaces the disc with a number of spring-steel beams.
cradek: can you remove the coupling and indicate for eccentricity(sp)?
skunkworks_: I think it's the motor shaft, actually
Maybe make a Layrub coupling? (As used on the drive shaft of the Jowett Javelin)
[21:32:11] <andypugh> http://www.twiflex.com/brochure/products/couplings/overview/layrub.php
andypugh: I'm having a hard time picturing that
they are rubber bushes ,steel inner bush in each bush, two flanges with studs engage
anyone know if there is some odd holiday in Poland atm?
cradek: A home-made version of this: http://www.gobizkorea.com/blog/ProductView.do?blogid=SYSGM_000000010&id=897850
(Note that the heads are a very loose clearance in the opposite flange, but do give an emergency drive if the disc fails)
none... odd, why is UPS screwing me around then....
usually that distance from me to poland = 1 day to get here and suddenly its delayed
yes - that is what I was trying to describe.
(the shimstock discription ;))
I have seen them with rubber/fibre discs. (used on the drive shafts of Dennis trucks from about 1922 onwards. Before then they used a radiused square steel block in a square hole, adding bronze slippers after about 1910)
Greens rollers used one on the drive shaft
was there a 35 size taper?
BT35 between BT30 and BT40 you mean (or 30/40INT)
[21:49:08] <andypugh> http://en.wikipedia.org/wiki/Machine_taper#NT_40_.28int40.29
(Before reading that Wiki page, my answer was about to be "No"
was trying a 30 in the adcock and shipley , sloppy fit, and smaller than a 40
[21:53:31] <andypugh> http://www.tools-n-gizmos.com/specs/Tapers.html
Has dimensions of BT35
1.5" at the big end.
They even have tooling for sale
[21:57:07] <archivist> http://www.archivist.info/cnc/works2008/P1010201.JPG
seems the same as a no 1 http://www.lathes.co.uk/adcock&shipleyhorizontal/page3.html
Heh, the artwork on the SAW VI dvd is suppose to be a circular saw blade, but it's actually a gear
anyone have any experience with enco's shipping? They said my order was packed yesterday, but no tracking number yet
it sometimes takes a day or two, but never longer
Eric_K: When it shows up at your door, it's been shipped.
that's what I'm hoping for, but I got free shipping so they may just wait for gas prices to come back down
if it's shipped, you can get the tracking on their website when you log back in
I guess dealing with McMaster has spoiled me
I dont get why ppl are like that... If you're so anxious to get something dont mail order it. Instead ppl will hit the refresh every 2.43s - it's almost as bad as a lil kid on a road trip saying ARE WE THERE YET? ARE WE THERE YET? ARE WE THERE YET? ARE WE THERE YET? ARE WE THERE YET? ARE WE THERE YET?
I just wanna hit refresh once and then go about my bidness
not exactly like I can buy the stuff locally
Eric_K: You probably could, just cost an arm and a leg
no way, closest source is at least 90 minutes away
cradek: you have kids?
I bought my son a toy from Burger king that said ARE WE THERE YET? over and over
what was I thinking?
Eric_K: See, there ya go, 90m instead of 90d
Eric_K: and you an buy battereies cheap from china, only take 21 days for delivery
for the toy
it's gone now I think
Eric_K: so, in the meantime he will say "ARE THEY HERE YET?" "ARE THEY HERE YET?" "ARE THEY HERE YET?"
my wife is good at urging the kids to throw away their old toys
But most of the stuff I get from China arrives in 9-11 days
when I order from china I'm pretty sanguine about how long it takes
the funny thing was when my daughter bought an ipod, watching it travel around the world was pretty entertaining
Um, they have those locally btw
it only took a couple of days to get here from Singapore
I wasn't involved in the purchase, I think it was drop shipped from apple
That's ok, iPods are just seriously overpriced
archivist, multi lathe are no good
and I hate iTunes
and I hate iTunes.com
I hate the fact that itunes needs to run in the background, what's up with that?
I hate that even for FREE apps, yu MUST have a CC on file with them to even sign up
I hate UPS
you mean Ooooooooops
for some reason my package is delayde until monday
when the distance where it is = normal time to get here is 1 day from where it is
[23:10:48] <alex_joni> http://www.youtube.com/watch?v=S955wKsPkqg
alex_joni: looks like they did the same to jst_home's router
seb_kuzminsky: probably so
* alex_joni is off to bed
good night all
I wonder if there is a way to suppress the "jst_home has joined" / "jst_home has left" messages?
with chatzilla you can
you can set your client to ignore quits and joins
Well, in general I want to see them.
or an op bans the user for a time
jst_home fix your connection please
I have turned off the noises, that should help me kep my sanity.
I have to decide what should follow me home on Thursday
can someone email me some of the funny standoffs that are 6-32 male and 3mm female like found on some older mobo's
I have dozens of them in a kit I bought, and have never found a use for them
But they are too big for my email tube.
hmmm how about the transporter
I broke it trying to use a 6-32 standoff in an M3 hole.
[23:46:17] <andypugh> http://www.maplin.co.uk/Module.aspx?ModuleNo=31262
jt-plasma: why do you need those kind of standoffs?
the mesa cards
i just use mobo standoffs
And can't you just CNC some?
from old puter cases
yea, make some on your cnc lathe lol
LOL they are for my CNC lathe :P
what came first, the chicken or the egg, right?
guess you answered that age old riddle
been through all the old cases and I'm 3 short
Actually, I think my Mesa card is held on by them, they self-tap quite nicely into MDF.
i got some from the fry's place i got my ribbon cables from
but i'm sure you need them sooner
did they have the 3mm female
I looked at Fry's but they didn't say much about the ones I found
no clue, i just used screws from my computers
if they had them then I'd order some cable as well
i wish jst_home would make up his mind
seems the newer ones use 6-32 for both threads and 6-32 is too big for the mesa holes and others
entering and leaving the channel 8000000 times
is that you?
oh, I never see that
i just drilled out the mesa boards
Every minute, regular as clockwork.
they drilled easy
I'm glad I don't have to see that anymore
* jt-plasma tries to do it right first then gets out the camp axe
when all else fails
i dunno, they only had to be opened up a hair
so i just did it
did it on the drill press, holding them by hand up to the drill bit
small enough hole, so there werent any problems with grabbing and spinning the board
it's only about 0.020 small for a 6-32 screw
i say you just go for it. punch them right in the baby maker.
I think I have an old computer left over at Dad's house
I did find a 5 1/4 to 3 1/2 bay adapter that is perfect to mount the hard drive on :)
well if you use 6-32 standoffs, you can get some taller ones so you can stack the mesa boards
I've just about talked my self out of that plan LOL
i just welded up a bracket. i used an old bad harddrive to bolt the brackets to, then welded them to a plate, so it was a perfect fit