Fenn and Eric I have good news
Parpot configured and works. Still received a home limit error. I used a scope and found that the hobby cnc board has quite a bit of noise.
[00:50:21] <cradek> http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?HobbyCNC
I noted a regular pulse that went +/- 3v for 80 micro seconds. I believe that was falsly tripping limit errors
I used a 0.01 uf capacitor and now it works.
minor documentation patch: http://pastebin.ca/1361105
will emc2 step muliple axis simulataneously?
can xstep and ystep be active at the same time?
go for it
when emc2 does a g0 move, does it do it at MAX_VELOCITY?
yes, for all the involved joints
or the TRAJ limit, whichever is lower
we're having some trouble with the system losing alignment, but we're debugging
we're trying to figure out if it's mechanical or our stepper control
we trust emc :)
you can also test uwing a "bare HAL"
load a stepgen, parport, and a siggen component
[01:36:10] <Optic> http://hacklab.to/archives/laser-engraver-is-alive/
we're using stepgen and parport
original config was made with the stepper wizard
but we've changed it quite a bit since then
connect the sine wave, or if you want to test accel/vel limits the square wave output, from the siggen to the stepgen. you can change the frequency and amplitude of the signal on the fly with halcmd
I'm talking about HAL, without EMC running
just the parport driver, the step generator, and the signal generator
that's a good idea
and you can load up a scope and several meters
so you can see what's happening
for debugging, it's best to reduce the system to the smallest thing that will exhibit the problem
and we should make a simple gcode that just draws a series of boxes
a siggen or two will do that nively also
is the USB supported on the Mesa 7i43? I only see EPP in the driver source.
there are simultaneous sine, cosine, square, triangle, and sawtooth outputs
only for power, I think
(and maybe not that)
so I'd have to add USB support
well, that's a much more complex task than you probably think, but yes - you would
yes, I didn't say it was simple :)
it's not just the 7i43 driver that would need to change. you'd have to write a driver for the USB host controller, figure out how to prevent Linux from using it, and make changes to the core of how EMC handles hardware
thats what I'm trying to look over
what's the contention over the USB host with the kernel and emc2?
USB and all normal Linux drivers are inherently non-realtime (in the context we need)
yes , it be tweaked for real time
not just that
emc2 expects to be able to read and write information in real time
USB always introduces some lag for any feedback data (such as encoder inputs or GPIO)
and there's also lag for command data
so the trajectory planner, which is in the RT kernel on the PC, doesn't have a good connection to the real world that it's trying to control
yes, it depends on the application, I may have a softcore in the fpga to handle this for my app
the FPGA side is the easy part
USB is fine if you have a "set it and forget it" system - you output a burst of positions which get played back at a fixed rate
and you don't care whether you get feedback data quickly
Optic: neat vid
yes, i see the latency issues
it works pretty well!
this screws up things like feed override on a CNC, and also makes it a requirement that anything like spindle synchronization or electronic gearing be done on the FPGA
anyone ever port emc2 to ARM or Microblaze?
definitely not Microblaze (AFAIK), there's abeen a lot of talk about ARM
I'm just digging into emc2 again
what's the size of the binary on x86?
there are a number of binaries that make up emc2
how long ago did you stop looking at EMC? :)
yes, depends on the features used
well, yes and no
there was always a split between task and motion (and probably IO as well)
about a year, forgot much of it already, just refreshing
ok, wasn't sure if you ever saw the whole HAL thing
lots of little components for small functions (usually - the motion controller is also a HAL component)
just looking at control over USB vs PCI for some applications
simple on/off motor stuff and similar
there's a device called the ncPod, which uses a Windows EMC2-based interpreter and sends position data to a USB connected device
the source code is available, though not always easy to find
the company is OEMTech
found the binaries
there's source too
but don't come here with questions :)
(we're unlikely to know the answers, really)
grabbed the sdk
now if you figure out something that could make USB position lists work in Linux, definitely come back ;)
(hmmm - I hope that didn't seem like I was being a jerk - it's just that we don't have anything to do with their codebase)
is there any demand for prepackaged debs for emc2?
don't worry :)
we provide Ubuntu .debs. if you have ideas on how to make those OS-agnostic, please do tell
I'm usually dealing with coreboot, grub and x developers
coreboot was LinuxBIOS, right?
it's civilized in here : )
I've never gotten to the point of putting it on any of my machines, but I'd love to try
I can hide a usb host from the kernel with coreboot
I think I have a SuperMicro motherboard that would work, but it's not specifically listed
init it later
you may be able to use some udev rule as well
almost everything is initialized with hotplug these days - even CPU cores
yes, we do that with VirtualBox
hmmm. unrelated question: do you know any virtualization (or Wine-like) solution that would allow me to run a Windows app that needs DirectX 9.0c, Shader model 3?
looking at using EMC for printer control
I think Wine is getting there - they have some new DX10 code now, but I always seem to hit a dead end at Shader Model 2
we have it working and shader 4
can I buy that?
or get it free :)
heh, my 16 year old son got it up
have to check with him
with a little help
pixel shader or virtex shader?
which graphics card?
well, definitely let me know - I'd love to be able to run Altium under Linux
I have nvidia and ATI - Quadro FX3500, some 9600GT
9500GT, and an ATI HD4870
you'll need the restricted Linux drivers for your gpu
and I'll gladly buy a GTX260 or later if necessary ;)
yep, I use the restricted drivers
he said it's a snap, it's in hardware
gotta get those 13000 FPS rates in glxgears ;)
he has it working on his old 9800pro
yeah, the hardware supports it, but I don't know that the libraries do
he got it
radeon or geforce?
they both had 9800s I think
do you know if he's using wine, or did he install Windows libraries
maybe I have a different problem with Altium - it could be a 32/64 bit thing or something else
eveything can be done in Wine
give him an hour for a howto
heh. OK - will do ;)
for ubuntu 8.04 or?
I have 8.04, 8.10, and 9.04 alpha - I can take my pick
and I can compile for myself if needed
wouldn't be too long on the Phenom x4
he's typing away
wow. great - thanks
glad I asked :)
ok, perfect. I think that's what's on the Phenom at the moment
sure, I'm trying to keep him busy and out of trouble :)
with the HD4870
well, anything I can do to help, you know
I'd almost rather have it in VMWare (where it runs fine but doesn't do the cool stuff without SM3), but wine is fine too
have you tried virtualbox?
virtualbox, vmware, and several wines
including Transgaming or whetever they call it now
debugging an issue now with virtualbox on 8.10 with WinXP on the VM
pro or free version?
free binary version, the open version does not support USB yet
right - that was what I thought
is that no USB at all, or just no USB2?
I have a device with 2 different product ID's, with a Cypress USB2.0 and fpga behind that
2 product IDs - that sounds a little odd
2 endpoints I can imagine, of course
but then again, I have one like that too - the Belkin Nostromo game controller looks like two devices
yes, one is the USB device before the FPGA gets loaded and the other is what the device becomes after
not sure if virtualbox can handle the USB ID shell game yet :)
I guess I should look into how all this works at some point. I might want to snoop some USB traffic soon, and doing it in a virtual machine seems like a reasonably good way of doing that
why I was asking about the Mesa boards
32 bit or 64 for the dx9 suppot?
well, my hosts are 64-bit, and I have XP64 pro - so I guess 64
done, maybe I'll get him to package emc2 in .rpm or for Gentoo
actually, I think there are ebuilds and RPMs already
but I don't know how recent they are
didn't notice them yet
I think you can check on the wiki for those
virtex shader 3.0 or 4.0 ?
not sure - I don't think that will matter
pixel or viretx, pretty sure one is ATI and the other nvidia
both are part of the DirectX spec
I need pixel shader 3
(I think that's it anyway - the specs only say "shader model 3")
he got it working about a month ago, the Wine guys didn't believe him and banned him from the irc until he posted a video :)
like I said it's civilized in here
hmmm. I'll take that as a compliment :)
this will be fun. I may try to get this to work on my laptop as well, so I can show the Altium guys at the ESC conference later this month :)
do some pc serial ports operate at 3.3V?
er, parallel ports
yes, I think many laptop ones may
SWPandos : which gpu is in the laptop?
also, there are electrical differences between the various modes (EPP, ECP, SPP)
L84Supper, Geforce 8400m or 8600m
which mode should be using for 5V?
the laptop is shader 4.0
the port has "bi-directional" epp and ecp
Optic, bi-directional or epp should work, I think ecp is not good (more often that not anyway)
L84Supper, I don't know that vertex shader 4 is even out yet - maybe part of DX10 or something
does the bios setting affect linux?
our parallel port seems to be making 3.3v :-/
Optic, yes - you should set the bios to epp or bidirectional
and/or get a breakout/buffer board
ok, it was set to ECP
wish there was an open version of pro-e or solidworks
yeah, that would be nice
there's a very inexpensive parametric modeler (for Windows of course) that does a lot of what SOlidWorks does
but it looks a bit like old skool UNIX software
called CadMax, $300
i just don't like working with windows anymore
yeah, me either
things like Altera FPGA tools bug me too - free on Windows, $2k for Unix/Linux
and then the boneheads at Altium who, though they make a fantastic electronic design package, use directX instead of openGL for 3D
the Xilinx tools are clunky as well on Linux
at least they work though
I haven't tried the Altium tools yet, what do you think of them?
they're really excellent
whats the $
some library support is sketchy, but of course you can pretty easily design your own components
does FPGA (but needs vendor tools for place-n-route), C-code to FPGA, pinpart/pin swapping between FPGA and PCB ...
Orcad/Cadence fpga integration is clumsy
yeah - Altium is a bit like SolidWorks in the PCB arena - it works very well, has tons of features, and looks nice
doesn't necessarily do a lot more than the other packages, but it's very easy to do some very hard things with it
and also, like SolidWorks, they seem to be stuffed quite a ways up Microsoft's ass
we get most schematics in Orcad Capture, layout in allegro
I haven't touched Orcad since the SDT III days
don't plan to unless I have to :)
Solidworks does most of the mechanical, the industrial designers prefer pro-e
oh it was terrible back then
yes it was
I can't stand pro/e
I never got used to pro-e
I guess it's what you are used to though
if nothing else, when it goes and checks for a license it should just do it silently
the ID people say it does all the funky curves and forming easier
I don't understand why it has to put up a dialog box telling me it no longer trusts me 30 minutes after it checked for the license last time
but what if someone else tried to start it up and stole your floating license
you wouldn't want to illegally keep doing your job, would you?
then put up the stupid dialog box
I haven't reinstalled since I upsized the HD, it didn't think it was installed anymore
I had that problem with CadMAX too
change hard disks or network cards and you're in trouble
it much check the ID or size of the HD to build a check for the license manager
like nobody upgrades PCs, ever
serial number a lot of the time, but there are some schemes that put data in unused space on the HD
And thus sw hacking was born
(like the rest of cylinder 0, which is often unused)
yeah, no kidding
Now, jsut shove it in a VM and remove the networking =)
"I will figure out how to use my legally purchased software without having to $TERRIBLE_SCHEME"
I'm expecting a SM3 how-to in a few minutes :)
"Hey, you a5holes, My engineers are in Alaska you dumb fsck and dont have internet access. Fix this POS!"
Linux has all these great 3d modelers and ray tracers, but no 3d CAD
Thank you and have a nice day
Stinger Missile 3 ?
SWPadnos: who did you piss off?
shader model, bonehead!
I mean JymmmEMC
SWPadnos: What's the toy this years at the show?
you have to pay extra for it
they still have some Arduinos from last year - I'm sure they're not too happy about that
the OMAP is what I was considering a port to of EMC
how much for the Arduinos?
I mentioned that I may want a few if they're fast enough
the OMAP in the beagleboard has ARM + DSP + GPU
they offered me one when I complained about not getting a pro-rated refund (they cut the conference to 4 days instead of 5)
I paid << half price, so I'm not doing too badly still, but it was annoying
and I had bought a refundable/changeable flight, so I didn't incur any extra costs there (saving a little, since I cut a day off the hotel :) )
so no fun day on Friday, I'm sorry to say
we'll have to hit the Palace BBQ some other time :)
like Sunday the 29th - does that sound good?
L84Supper: if you want to help get the linux 3d cad off the ground, help work on HeeksCAD
[03:16:55] <fenn> http://heekscad.googlecode.com/
this is something i made the other day
[03:18:50] <fenn> http://fenn.freeshell.org/motor_mount.png
[03:24:55] <L84Supper> http://pastebin.ca/1361217
Wine with DirectX 9.0c Pixel Shader 3.0+
contact him with any issues
will do, thanks again
I should get him a paypal account :)
did anyone ever get the Lego NXT stuff going with Linux?
I rode my bike on a 70 mile ride known as the "7 climbs of death"
I think it is amazing that blackberry has an irc client
Speaking of different CAD packages, I recently discovered VeriCAD http://www.varicad.com/
it has Windows and Linux versions. Has anyone here used it or tried it? Or heard anything about it?
Im working on a bridgeport mill conversion. Could I uses the pre-existing DRO glass slides as a good encoder setup vs a on motor rotary encoder?
yeah that was my question
you can do that, no problem
Seems to me it would be better considering I would have to worry about play anywhere in the system since the reading is coming directly off of the linear slide.
wouldnt* have to worry about the play
depends on how much play you don't want to worry about, but it should help
i mean if there is some play in the screws that wouldnt really show up on since the slide is where the reading is coming from
However, it may cause the slide to jitter on heavy cut regardless
Also, in theory I wouldnt really have to mathematically figure out the ratios and screw pitch for anything
you have analog command servos?
yeah (im guessing)
Dac amp copley controls amp cards
eric_unterhausen: what kind of setup do you have?
analog servo using motor encoders for feedback
Do you have any photos of your system?
it's on cnczone
I gotta go to be thoug
if you can't figure out the screw ratio you have no business messing with linear encoders
gnite, I'll find the link next time
np seeya round
Its not a matter of being able to do math, its a matter of why do it if I dont have to as well as pay 180 for two new rotary encoder when I already have 2 linear encoders installed
because you need some form of velocity feedback from the motor
or they will buzz like mad from the play or stretch in the system
What outputs the velocity, just the A/B phase of the encoders?
the linear encoder is much lower resolution, so you get very coarse velocity info from the position ticks
isn't that dependant on the quality of the encoder?
in the 80's they made a lot of systems with glass scales and tachometers, which are little DC generators attached to the back of the motor (voltage proportional to speed)
which im using
All my motors have tachs.
you could use a super high resolution scale but why?
While running my motor without load and with the rotary encoder the vibration/hum is basically gone
I have run servos with just a hi res linear encoder with good results. Max velocity was a little lower then "usual", what, maybe 100 or 200 FPM? Lower due to "speed limit" of hi-res encoder, as I recall. Not bad though.
KimK: are you saying there should be little problem with buzz/humm/vibration in the motors you used when you used linear encoders?
Like fenn mentioned I really don't want bad buzzing in my motors 24/7
Well, we did not have any servo tuning / feedback / type-problems of that sort, but we were using induction motors and vector drives, so running on AC. And in a loud industrial environment.
We must have come in to run them on a weekend, though, and I don't recall hearing any unusual noises when things were quieter.
There should be something in the wiki about the advantages of running two encoders though. As I recall, the hi-res encoder goes to the "I" term of the PID and promotes more accurate final settling. Maybe the rotary encoder removes the speed limit so the hi-res linear encoder doesn't get "lost" at hi speeds?
No, I'll bet not. If it gets lost, it gets lost.
Lost is lost
I'll just have to do some testing with what I have at hand if all else fails I will go back and use rotary encoders
I'm always glad when I get to use a Bridgeport that has a DRO, versus one that doesn't, though
KimK: I run a screw machine shop, Acme gridley 6 spindles and davenport 5 spindle bar feeders, What do you specialize in?
I do assorted electronic and motion control stuff, sometimes a little simple machining. Working on some EMC2 retrofits. I've done non-EMC2 retrofits in the past. Looking forward to seeing EMC2 work.
the idea is the linear encoder doesn't need to be so high rez
In my case, the linear encoder we were using had an optional converter box that put out the usual A/!A, B/!B, Z/!Z. So (as that button in the commercial says) Easy!
Well, fenn I suppose I'll just see what I get and go from there, I still have a lot to learn so i'll be messing around with thi stuff for awhile.
Do you have a ny photos or specs on your setups fenn?
The HALscope should make tuning easy, when you get to that point
UncleGemc: eh i haven't dont anything substantial with servos yet
[06:54:32] <fenn> http://fenn.freeshell.org/portfolio/DCP_0785.JPG
that's a pancake servo from a copy machine
yeah, me either I just got a couple running like bats out of hell on my desk here, I am in the process of building the conversion block for the mill and also a yx table to do profiles on my index werke single bar feeder
Hah, is that a plexiglas/perspex motor mount?
The "floating" motor, LOL
Hey, if it works, I can't knock it!
what is the machine it's self?
from this POV it looks like a very basic lathe
UncleGemc: While we're waiting for fenn, what city are you in, and how has business been lately? And since you mention screw machines, how long does it take you to changeover? Or do you never change?
it's polycarbonate, 3/8" or so
i had a bunch of it lying around
Huntington, IN north of Indianapolis and south of fort wayne. Depending on complexity of the part a achanger can take anywhere from 2 hours to 16 hours and average of 8 hours in most cases
the machine is a gingery lathe, somewhat modified from the original plans
UncleGemc: OK, I had heard changeover on a screw machine was a big deal, just curious.
This reason is why I considered getting into CNC on my single barloader, I can do a fast setup for prototype/sample parts and short run jobs without taking two work days to complete
fenn: welcome back, thanks for the pic
my original idea was to do lost foam cast aluminum for the motor mounts, but i had to give the CNC foam cutter back to its builder
and the cam software available wasn't up to what I wanted
seems to me it would be easier/cheaper to buy a small hardinge at auction and do a conversion that way
you should get a HNC - that way it's basically done already
[07:06:43] <UncleGemc> http://www.pulleys.com/hardinge6station.jpg
[07:06:47] <fenn> http://www.wallacecompany.com/cnc_lathe/HNC/
Thats what I was referring to
look at the size of that crank pulley
i wonder what all that electrical stuff is on kirk wallace's lathe
VFD for the coolant pump??
oiler relay and timer fuses?
looks like a lot of overkill to me.
maybe he just has money to spend
fenn: re: cast aluminum, interesting, what kind of foam is it OK to "lose", without (possibly) releasing aluminum-unfriendly gases? acids? etc? Does about any foam work?
On the coolant pump VFD, I can see a use for that. Recently I was using a machine with a strong coolant pump, I had to turn the stop valves almost all the way closed (99%?) to stop excessive splashing.
So that was OK for a while, but then slowly, slowly, the valve openings clogged, and the coolant dropped off. So every so often, I had to open the valves and then close them again.
A VFD would let you keep the large (non-cloggable) valve opening, but reduce the flow as needed. So I vote nice feature.
KimK: the most environmentally friendly is plain white styrofoam; i use blue house insulation because it has a fine grain structure for good surface finish, but it gives off some flame retardant stuff which stinks
don't use "great stuff" though because it gives off cyanide
just putting a secondary coolant output valve back to the pump resivoir would do the same thing though
thats I how I do my pumps on my crossdrilling machine.
fenn: OK, thanks, I'll keep that (those) in mind. If I was heating aluminum, I would likely be heating it in the great outdoors, but still, you can't be too careful.
UncleGemc: Say, that sounds like it would work too, I'll give it some thought
KimK: you see, im kinda old school and used to mainly mechanics so I seem to find workarounds without electronics before anything else
I gotta admit though, there are some pretty amazing things I can accomplish with this cnc business
Hey, no problem, whatever is the easiest and cheapest to get working. Especially in the present economy.
building a cnc profiling attachement for my single barloader will saves tons on form tools since they need to be edm'd and ground all the time, where the profiler can be just a simple carbide lathe tool
especially with sample parts and prototyping, I dont want to spend a couple hundred on tooling just to make 5 parts.
Speaking of cheapest (compared to AutoCAD or SolidWorks) Have you guys ever run across VariCAD? I asked this earlier, sorry if you saw it already. Or how about HeeksCAD or HeeksCAM, ever played with those?
I like Qcad because it's free on Ubuntu, but it's only 2D and is pretty basic. I miss TurboCAD Pro on Windows, but hope not to go back to the dark side. VariCAD looks promising.
I tried using the dxf to gcode converter but I cant seem to get it to work
anyone else mess with it?
from my experience it just would output a blank file
BTW, there is a Windows version of Qcad (the "Community Edition", free and unlimited) on SourceForge. They don't advertise it much on the web, but it's there.
You mean dxf2gcode? Yes, I tried it, I got way more than nothing, but it was kind of confusing mess. I used some of it by copying and pasting blocks that I recognized. Other parts I just filled in by hand. So, not a rousing success for me.
yes that was the program but like I said I just got fail :P
I will have to look back into it
Did you feed it the DXF from Qcad? And did you make use of layers at all? I think layers help, but I can't really say from one test.
it may not have been from qcad, it was a dxf I got off the web
:( got D/C did I miss anything?
Not a thing, I was looking up something. And here it is: The download page on that Windows free-non-demo Qcad: http://sourceforge.net/project/showfiles.php?group_id=240145
It's a totally manual install, you have to create a folder under "Program Files", and then make a shortcut to it in the Start Menu. The upside is, it doesn't monkey with the registry or anything.
To uninstall, just delete everything manually.
yeh, I dont really use windows much so..
I did btw just get that converter to spit out a simple file I made in qcad to work.
Yeah, I'm trying to avoid Windows too, but useful free apps (Firefox, OpenOffice, etc.) are great ways to lead users to Linux, and make them feel more at home when they get there.
thats how I did my g/f
You got dxf2gcode to work? Great! What did the result look like?
Was it what you expected?
LOOKED LIKE WHAT i EXPECTED :)
I hate it when I bump caps lock, lol
I actually left it on from when I was editing the gcode file getting rid of the z axis
Your machine wants caps? Yeah, probably most do. Nice that EMC2 takes either case.
Well, UncleGemc , fenn , thanks for the chat. I'm going to call it a night.
what is preferably used for steppers, fast, slow or mixed mode decay?
if you take a step in x&y, you move further than if just in X (1.414... and ad nauseum for xyz xyzw etc motions).
So, the velocity would increase if the step rate was constant ( constant step freq but varying step lengths).
Does emc check the velocity on a step by step basis, or a longer time interval?
we ran across this in the 80's on AGie wire edms (2d systems)
emc doesn't deal with steps at hte planning level, it deals with position changes over a fixed period (the servo period)
it's impossible to move less than one step
huh, what about less than 1 step? the dist traveled in XY motion is 1.414 the unit size
so if you choose a step size that's large enough to make a difference whether you're moving X, XY, or XYZ, then you have an inappropriate step size
in all likelihood, the steps on XYZ will not be at the same instant, unless they're all going full speed (not likely in EDM)
so you end up with a zig-zag, and slightly varying speed
i must be unclear, the distance moved is greater in a multi axis step, than in a single axis step. if the step rate is constant, the velocity is not constant
yep, I agree
you asked (I thought) if EMC takes this into account. the answer is no - not at that level
EMC asks for a velocity, which is decomposed into joint velocities, which are accomplished by stepgen (for steppers)
what are you doing up? on the road?
no, I'm getting ready to go out to breakfast with my wife :)
ummmm american breakfasts (drool)
it's almost 10:00 - you have to get out relatively early to aboid the college crowd
best eggs benedict in the world IMO
(and I've tried a lot of eggs benedict, in ~15 time zones)
oh, and you're in maple syrup land too
hmmm. maybe a waflle too :)
hey - they're online: http://www.sneakersbistro.com/
way back when it used to be a jazz bar that started to serve breakfast
now they only do breakfast :)
time to run. catch you later
hi Dan, how are you
doing well. Are you still across the ocean?
yeh, looks like another month, got nice digs tho
we got 5 axis up running & incredibly sweet. sounds like real servos should ( squeek, whiz, chirp )
what kind of machine?
custom 7 axis edm
i have the spanish cnc developer here with me, between him & the taiwanese, i go nuts
whats new in the usa? did obama make a difference? everyone her is dissapointed he wasnt the messiah
I've been too busy to notice yet. We're making bike parts as fast as we can here.
we started doing bike frames too
biking is big here, really hi-end shops. people throw big buck around
[14:07:38] <DanielFalck> http://cielo.chrisking.com/
i loved to watch brits sweat frames together with italian joints
the drop outs, seat stays, fork crowns, head badges, heat tube collars, etc are some of my work
out of 17-4 stainless
[14:09:39] <DanielFalck> http://www.velonews.com/photo/88700
HeeksCAD/CNC is coming along nicely now
pocketing is working very well
I did some engraving in my home shop with it last night
the pix are great, i dunno Heeks
[14:11:44] <DanielFalck> http://imagebin.org/41383
[14:12:00] <DanielFalck> http://code.google.com/p/heekscnc/
his work is split up into different modules
[14:12:34] <DanielFalck> http://code.google.com/p/heekscnc/wiki/Capabilities
hey i cant look that fast! you a busy guy ! :)
even brent of apt360 fame is checking heekscnc out
we still hang out in #cam
i've not been on #cam for a while...
steves_logging is now known as steve_stallings
i dont et it, what the heck should PFD be ? :) anyone know ? ... i have a pot on now but i cant figure out what the max voltage in on it is
pfdh = 0.6xVDD, pfdl = 0.21xVDD
should i just set it to mixed and be happy with that? :)
Personal Flotation Device ?
[14:59:00] <alex_joni> http://www.kayakonline.com/pfds.html
alex_joni: setting for decay mode
anyone here have a good idea about oxyfuel cutting?
what do you mean by "good idea" ?
abouit how piercing works
and with lots of backspatter
yeah, that's what im wondering
do you just preheat lots then go down with the torch to cutting depth?
after turning on the cutting gas?
you need to do some pecking cycles
[17:50:29] <anonimasu> http://www.io23.net/ul/files/IMAGE_217.jpg
ah, thin stuff?
and thicker stuff too
[17:51:07] <anonimasu> http://www.io23.net/ul/files/IMAGE_218.jpg
[17:51:16] <anonimasu> http://www.io23.net/ul/files/IMAGE_213.jpg
thin enough ;)
you get issues if you pierce with more than 40mm
and how do you do it?
like call up a peck cycle?
something like that
I were hoping to avoid it :)
I have a motor but no controlled Z
other then a thc that should arrive soon
and that just moves Z to make it keep a constant height with some relay outputs
alex_joni: any ideas?
cut from the side of the sheet ;)
or use a drill to predrill insteead of piercing
at least that's how I've seen it's done on thicker stuff
but for <40mm stucc
for that you could probably do it
im looking for options how to make it work with my setup.. like peck cycle, but without a fully controlled axis..
basicly you need to move up/down a couple times
not necessarely in a controlled manner
well, I can move my axis down to the cut height..
and run it up, for 2 seconds and pierce
and move it down to the cut height and repeat
yup, that might get you closer
try doing it by hand a couple times, till you find a good setting to do it
yeah, as soon as the thc arrives :)
I meant by hand
holding the torch
with your hand
* anonimasu nods
say, does anyone here have experience with casting timing belt pulleys?
I've looked around a bit and these pulleys are very expensive
do you want a sandwiches ?
[20:21:50] <giacus> http://www.youtube.com/watch?v=lQOkMz3kiS0
that was odd
but I do want a sandwich
dpy: i think you'd have to hob them like a gear
dpy: are you doing XL or MXL or what?
fenn: this is for MXL
what is "to hob them like a gear" ?
yes of course, that is the standard way of doing it
my point is: can't you take an existing gear, make a mold out of it
and resin cast a new one
for MXL the gears are fairly small and lightweight
meaning, the resin/mold supply costs are low
oh, resin cast yeah
lower than buying a couple of these at sdp/si or one of the european companies
i was thinking sand casting aluminum or something
but I figure, I'm the only thinking of doing it
i think i'd rather figure out how to set up a way to make them properly, then i can make any size i like
properly means a 2000+ machine
you're just not thinking
[20:59:09] <fenn> http://www.americanmachinetools.com/How_to_use_a_Milling_Machine_files/Fig8-34.gif
single point gear cutter
good night all