:) i only learned 1 swear word, and have since forgot it thru disuse
look for the StudioDesignPKM app too
theorb is now known as theorbtwo
blender has all the kinematics I need, it just needs a UI more suited to building mechanisms
it looks so easy in TopSolid compared to blender
* Valen is a rocket scientist
well space scientist anyway
but I work in IT :-<
what type of rail is this using ? http://en.wikipedia.org/wiki/File:Mineral_casting.jpg
Valen: how specific an answer are you looking for?
what should i google for to find some details about it
I have seen round linear rails and bearings but their load rating is pretty low
hmm... I've heard them all referred to as "linear bearings"... linear rails might be a little more specific
I was looking for the name of the ones with the angles rather than a round
Valen: what kind of loads do you need?
[03:38:11] <L84Supper> http://www.techno-isel.com/tic/quote/TechnoRail_A.htm
hopefully milling steel
the dovetail rails/guides in that pic are rather small
dunno what that pic is for
[03:47:50] <L84Supper> http://www.nookindustries.com/profilerail/ProfileRailHome.cfm
they have some pretty heavy duty stuff
[03:48:42] <morfic> http://www.linearmotion.skf.com//home.aspx?lang=en&cou=8
i am not sure where our designer ordered the rails from for the tail stock
larger rails with ratings to ~32 tons, that should be rigid enough
[03:49:27] <morfic> http://www.deltron.com/
linear ways <-- probably best terms to use for google
yeah skf, danaher, many more
still not sure about this "let's machine the tail stock, so we can move it on linear ways" idea, but that's not my decision
THK is probably the biggest http://www.thk.com/us/products/index.html
Valen: I'm using some of these ball screw actuators that use similar rails to machine steel http://www.parkermotion.com/products/Ball_Screw_and_Lead_Screw_Tables__5508__30_32_80_567_29.html
but this machine http://www.hermle.de/ablage/med_00000101_1225117081_C20_EN_2008.pdf http://www.myvideo.de/watch/4107844/5_Achs_Bearbeitung_auf_Hermle_C40U
uses them to pretty good effect
thing is I can get the round ones *really* cheap
8 x supported rail SBR25-600mm long 16 x SBR blocks to suit 299 usd
4x RM2505-600mm ballscrew with ends machined to suit bearing blocks 279 usd
8x bearing block BK/BF15 sets, 4BK12 x fixed 4xBF12 supported style 136 usd
Sub-total: 714 usd
Air shipping: 343usd
Total: 1057 usd
thats for 25mm rails and ballscrews
check the load rating
yeah, pretty light is the down side
just looking for it now
there are dry bearing versions as well
we are using ballscrews from this guy to good effect http://shop.ebay.com.au/linearmotionbearings2008/m.html?_nkw=&_armrs=1&_from=&_ipg=
basic load rating is c 100 and co 160 kgf
[04:12:35] <L84Supper> http://www.igus.com/Main_fs.asp?KATALOG=XIGLIDUR&GO=IGLIDUR_EXPERTE&language=usen&Unit=I
use the calculator to see what type of life you'll get
ichudov: you using ubuntu? a simple way to install Heeks is with this: https://m21.hyte.de/blog/category/cnc
I sorta upgraded my computer over the weekend :) I have an Intel i5 quad core, 4gb DDR3 RAM, dual nVidia 8600GT in SLI
rob_melb_ is now known as rob_melb
elmo40: That's it? Eeeeesh, I have that much power in the calculator I just bought for $0.99
I have 8gb ram and one 8800
q6600 though not the I5
X2, 2GB and 9500GT here. that's 3 of us who can run Cuda
EMC for cuda = FTW?
not that we need it for emc2 yet, but it's nice to know it's there :)
naah to be honest, I can't think of a single use
maybe a voxelated simulation in the axis display
that'd be cool
actually that'd be really cool
wouldn't even need to be voxelated
means you can use sim to check for gouges and such
FEA on it too, so you can check it doesn't overheat
this probably all belongs at the CAM stage, so maybe real time isn't vital
* Jymmm has a 486DX50 with 8MB ram and monochrome CRT!
* micges_work is jealous
Ok I lied, I only have the monochrome/paraport 8bit ISA CARD, not the CRT (anymore)
But, it does have 3.5" and 5.25" FDD's
this is a nice taxonomy for rap-names: http://i.imgur.com/RXRGd.jpg
I am going to have to try this as soon as I get fully setup http://www.adafruit.com/blog/2009/05/25/adafruit-business-cards-laser-cut-spirograph-cards/
Jymmm: very cool
what's the 'width' in slot cutting?
I would understand the width of a slot to be the short dimension - if cutting a slot with an end mill in one pass, the slot width would be the end mill's diameter
cradek: I mean here: http://git.linuxcnc.org/gitweb?p=emc2.git;a=blob;f=nc_files/useful-subroutines.ngc;h=7aa1903704f2872ae6c295d5fea0f15e52ef92ce;hb=HEAD#l39
alex_joni you around? got a couple of questions regarding the robot stuff if you have a minute
robotic, nice topic
Colinb: your best off asking a question
not asking to ask
you mentioned a while ago that emc needed modding to make it work properly with robot arms
iv got myself a fanuc 420i arm and im currently hooking some servo drives upto it so i can play with it in emc
Colinb: well.. there is still a fundamental change that is going on in emc2
currently the code is in joints_axes3 ( a separate branch )
but the regular branch could be good enough to run it
what changes are needed?
a clean separation between joints and axes
j0,j1,j2,... vs. X,Y,Z,A,B,C...
how far along is the code?
i do have a robot programing addon for delcam
and i can output individual joint angles
it compiles, runs
but to be able to feed it straight gcode would be nice
so what are the changes making it do that it cant do already using the kinematics as they are?
[#emc] "This is the #emc channel - talk related to the Enhanced Machine Controller and general machining. Website: http://www.linuxcnc.org/,
wiki at http://wiki.linuxcnc.org/"
it is funny going through my access logs for my website...
like this http://www.usinages.com/ca-c-est-du-changeur-d-outils-t942.html
wonder what he means by "decent DIY CNC" if max is "fairly expensive"
I don't think he knew what you used to make it.
cradek: did you see our broaching results?
[14:29:16] <skunkworks> http://www.electronicsam.com/images/KandT/conversion/yaxis/adapt-a-broach.JPG
we pressed the metal gear though the aluminum ring.
did you grind the leading side flat?
(I see the teeth on this side are filleted)
yes - we ground the back side of the gear square.
what's it for?
it is how we are going to drive the y axis.
it is going to be one end of the 'flex' coupling between the y axis and the servo.
(working with what we have_
it will allow for a little bit of disallignment. (still think I made up that word)
alex just about to build a spare rig to test and play with the ja3 stuff
it will be in an oil bath all its life - so I think it should work well. (for the minute movement it might have)
keep your broach in a safe place, preferably attached to the machine...
we tried to hard couple it - but the runout of the shaft we made was too much.
it was wishful thinking that it would all line up correctly :)
I'm currently having the same wishful thinking with the cnc A axis I'm building
we'll see how it turns out :-)
what are you using?
putting a motor on a good 12" manual rotary table I've had for some time but never used
(what use is a manual rotary table?)
heh you can see it where it's been stored for ages: http://timeguy.com/cradek-files/emc/jr.jpg
we have some large ones - works great for making circle when you don't have a cnc
huh? I don't understand what you mean.
on the floor - on plywood? ;)
I'm in the process of making it even heavier
heh - funny how that works out. - dad machined the adaptor that mounts the y axis servo - took out about 25lbs of cast and it still hurts to carry :)
I'm going to have to come up with a better way to lift it...
time for a gangtry crane in your shop :)
oh - you don't have the headroom
engine hoist would be fine, but I don't want to waste the space to store it
some sort of pier(sp) hoist?
actually it's pretty ok for two people to lift - maybe I'll just continue to use that method
arg, maritool doesn't make 5C metrics
cradek: I am so jealous of your lovely cnc mill... plus it will have a 4th? >_<
yep if it works out... either that or I'll be looking for a cnc rotary on ebay :-/
cradek: something like this - but not so expensive ;) http://cgi.ebay.com/Jib-Crane-H351-6-1812-3-ton-18w-138-h-20l-/350395865172?pt=LH_DefaultDomain_0&hash=item5195389854
ah - cool
looks like it needs good floor attachment...
it is all reletive
yes, those rely on floor thickness. for 1000lb capacity with a throw of 10feet you need 3' deep concrete at a radius of 2' !
we are about to add 5 of these in our shop. but 25' throw and 2000lb capacity. Insane the tube size! I can't hug it, that is for sure.
was the sag fault of libcrypto.so on 10.04 do to lack of memory I have 516mb and axis won't run on the live cd for me either
lack of memory? at 512?
alSMT: not enough information to guess what's wrong
seems to be the same problem that others have had axis won't start do to sag fault of libcrypto
jepler noticed it happens for some python users on 10.04, not only emc2
maybe there's a bugreport at launchpad?
I keep on having the 'file system locked' issue. when I close Axis I can not run anything else, nor click to shut the computer off.
yes anyone find any help for it?
i'll ck launchpad
alSMT: try renaming it and see if AXIS starts up then
you can there too
ok I'll give it a try
hmm.. another thought would be to install libcrypto++8 from universe.. maybe it replaces libcrypto which segfaults
can that be done using livecd
i hate to install if it wont run
here we go
cradek: interesting location for the probe. can't put it in the tool carousel?
I couldn't then - it's in the carousel now
cradek: are you going to use the amc drive for the 4th axis?
already tested, even
that was with encoder velocity setup? (within the amc drive)
the motor I'm going to use has a tachometer (and no encoder unfortunately)
I haven't decided whether I'm going to put the encoder (resolver really) on the worm or the rotating table itself
it will have a tiny bit of backlash but in velocity mode I think I could still tune it fine
that should be fun
I wonder how "linear" my resolver is (can a rotating device be linear?)
I think with elson's board I get 8192 counts/rev
I think that is something you try not to think about and assume that jone's converter just works ;)
well I could pretty easily test it (against jr's ballscrews)
set it on the table horizontal - bore a hole in something - mount off center - rotate axis - probe hole - repeat
actually I have a good bore standard. surely it's quite round - I would use that for the 'hole'
I could even generate a comp table for it that way!
let you know if your gear is consistant
I'd test small increments over 4 degrees for worm error, and then maybe every 4 degrees for gear error
I bet there are both kinds of error - it would be cool if we could code periodic errors into our comp tables
well I might have resolver error too... hmmm
but if I put the resolver on the table itself, I'd be measuring only resolver error
hmm - yah - I think you don't know if it is resolver vs worm gear - but you would know the ring gear error.
well depends where the resolver is
you can test just the resolver if you put it in the center of the table
resolver, worm, ring errors combine if you put the resolver on the worm
hm, 8192 isn't much resolution - each count is .005 at the outside of the table
I better put it on the worm
6 * (2pi/8192)
fired up the old pcb mill today: http://www.youtube.com/watch?v=9Pi5gnrcf1c
some kind of socket?
hpgl format? so it is technically a plotter?
awallin_: did you make that beast?
it's made by LPKF in 1994 I think
stepper motors with round-bar type rails
awallin_: JEEBUS, the table and rails on it are huge!
that is huge? interesting.
For PCB, yep
the working area is A4 or 210x297mm
[16:40:57] <awallin_> http://cgi.ebay.com/LPKF-PROTOMAT-C30-S-PRINTED-CIRCUIT-CARD-PLOTTER-SYSTEM-/320592019966
1" thick table
that ebay one must be a newer model, but otherwise roughly the same
The only plastic I see is the cords
and the hose
Heh, that auction is local to me
this looks like their current model http://www.lpkfusa.com/protomat/h100.htm
Ah, THAT one I've seen before
Ina DIY PCB mill, has anyone come up with some kinda of automatic tool changer design?
does anyone know a windows x server with hardware opengl acceleration which could remote display the emc axis gui? or maybe software opengl but this should work quite fluid than. i tried cygwin but the x-server is really slow in updating the 3d view. and xming doesn't show the axis window at all
I used it for display of scientific data via opengl. of course, it is not free :(
what! for pay? ;)
what about http://www.calcmaster.net/visual-c++/xwinlogon/
(just doing a search) says opengl
thanks, i will try it :)
yes, but the one difference is that only exceed does render openGL on your graphics hardware
all others use mesa3d
but its expensive :(
but even non-free software has its uses
:) I come from the windows side... so I know :(
JT-Hardinge: ping? JT-Work ping?
JT-Hardinge: JT-Work This is on sale (with coupon) for $59.99 (not the 79.99 listed here) http://www.harborfreight.com/1250-lb-capacity-mechanical-wheel-dolly-67287.html?utm_source=prospects&utm_medium=email&utm_campaign=3810B
Anyone recommend a source for
tapered ball/bull nose bits
you can't find them cheap unfortunately
(For release angles on sand cast patterns)
Not looking for cheap
I get some from precisebits.com
they have a 5.6, 3.? taper bits
(Those are the half-angle degrees)
[20:28:07] <cradek> http://www1.mscdirect.com/CGI/GSDRVSM?PMTYPE=KEY&SISMNO=17108998&SIPCNO=0000000718&SIZZNO=65595119&SIS0NO=1506388&SISHNO=0&SISRC=KG&SISRCH=1&SILEVL=3&SILSEQ=1&SIT4NO=94229428
on the off chance that url will work...
around $30-100 each
I'm seing that.
[20:43:05] <Anon9782345> http://www.precisebits.com/products/carbidebits/taperedcarve250b4f.asp
Jymmm: that is a car dolly not much use for moving machines I suspect
Jymmm: a buddy gave me some turtles the other day anyway