Well, it is hard to say, I think there is a limit to the base period (at
least I saw that in my machines) and it is about 1 to 15000 ns. If I
decrease it, everything froze. Said that, an approximated formula that gives
you an idea of the needed base period is:
BASE_PERIOD = 1 / (
Hi all,
I use the EMC 2.1.6 with a Bridgeport style, three axis BLDC servo system.
The servos are digital types with own position loops. Two parports, software
PID loops and freqgen used, see that picture
http://www.upload-images.net/imagen/390bf13788.jpg for more.
I use this G code to test:
Jon Elson wrote:
Gene Heskett wrote:
On Tuesday 21 August 2007, Jon Elson wrote:
I think with a hollow electrode with a drip feed
scheme through the electrode it would go a lot faster.
Theres always that 'yabut' Jon, in this case yabut where can I find one of
those? :)
How about a
Date: Wed, 22 Aug 2007 16:28:19 -0400
From: Chris Mason [EMAIL PROTECTED]
Subject: [Emc-users] help
To: emc-users@lists.sourceforge.net
Message-ID: [EMAIL PROTECTED]
Content-Type: text/plain; charset=us-ascii
To all,
I have downloaded the live cd successfully..according to the mdsum
I have also noticed a slightly similar thing but in a different context.
I have a script in which a cut is made by the Y axis then this returns
by means of a G0 and the work is turned by the A axis. The A axis always
starts to move just before the Y axis stops. This is on a basic stepper
The lower you have your acceleration set - the more you will see emc2 'blending'
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?TrajectoryControl
If you want it to be exact path you need to use G61. This will stop at every
endpoint and follow the path exactly. You could do a G64 Px.xxx where
On Thu, Aug 23, 2007 at 08:51:09AM -0500, Sam Sokolik wrote:
The lower you have your acceleration set - the more you will see emc2
'blending'
http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?TrajectoryControl
If you want it to be exact path you need to use G61. This will
stop at every endpoint
Gentlemen,
That is the fix.
thank you very much! :) :)
Stuart
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Still grepping through log files to find problems? Stop.
Now Search log events and configuration files
My first pass on getting my lathe turret working went okay. It turns out
that shell scripts are way too slow for what I was trying to do.
The plan was to, using an M101 script, energize the rotator solenoid,
which raises the turret table and starts it rotating. I then monitor the
four bit binary
Kirk,
I now have a cd that works. It boots on one pc but not the one I want to use
it on. The problematic pc just goes to a blank screen as soon as the boot
sequence starts. I have formatted the hard drive on this pc and it was
having registry problems before...windows xp. So my problem is
Hi folks, I'm new here. My name is Sebastian Kuzminsky, I live
in Boulder, Colorado. I'm a software guy with a little electronics
experience. For my day job I do mostly kernel and network programming
in Linux.
I'm just starting to play around with machine tools and CAD software.
I've cut some
I'll have to get back to you w/that info. What's smp?
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Stephen Wille
Padnos
Sent: Thursday, August 23, 2007 12:59 PM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] loading emc-unbuntu
Chris
Chris Mason wrote:
I'll have to get back to you w/that info. What's smp?
Symmetrical Multi-Processing - more than one CPU
- Steve
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Still grepping through log files to
Hi,
Thanks everybody the answers. I made a picture about pid.0.error (X-axis),
pid.1.error (Y-axis), axis.0.motor-pos-cmd and axis.0.motor-pos-cmd. You can
see it in: http://www.upload-images.net/imagen/c6ebc76f47.png , an other
after the acceleration changed smaller value:
This really sounds like a perfect job for classicladder. If you arent
interested in learning ladder logic, then writing a custom hal component
might be easier, since you seem comfortable with C. I think the issue here
is that your script is not running realtime, and so the timing is off.
As
On Thu, Aug 23, 2007 at 10:40:02AM -0600, Sebastian Kuzminsky wrote:
About the circuit, what is the purpose of resistors R1-R4? They look like
pull-up resistors for the encoder outputs.
The encoder I had used OC drivers, so the resistors were the recommended
circuit. If your encoder has
Chris,
How about putting the hard drive from the bad machine into the good
machine and trying to install onto it there? The other thing would be to
get hold of a low level disk repair program and run it on the disk from
the suspect machine. If you install the Linux as the only OS on the
Chris Mason wrote:
Can you recommend a low level (downloadable) program for cleaning the disk.
I'd rather not swap disks around and all that if I can avoid it. I have a
feeling that you are right and windows somehow left some crap on the system
that I can't seem to shake.
I'm sure that's not
When the pc first starts to boot (black screen/white letters), it
acknowledges that the cd is in and seems to be reading it (some verbage that
I don't remember but it seems to know linux is in there). Right after this
is when the ubuntu screen appears on the working pc.this is when the
screen
Thanks for the help.
I set my base period to 15,000, servo period to 60,000 and traj
period to 600,000.
I lowered my max vel to .75 (45 inches per minute, plenty fast
enough). Everything seems happy except the realtime error which I
have not run to ground yet.
The RT error was there at the
OK.
It now sounds to me like the video card is some extremely strange beast
(at least relative to the Linux world :) ), or something like the
multiprocessor thing is causing issues.
I'll be interested in seeing the hardware specs wheen you get them
later. I think you may need to install from
Cecil Thomas wrote:
Thanks for the help.
I set my base period to 15,000, servo period to 60,000 and traj
period to 600,000.
Ack!
Unless you're running a servo machine at 1000m/min (yes, 1 kilometer per
minute), you don't need a 60 microsecond servo rate. For most normal
machines - those
I'm fairly sure the video card is an oxygen. The system was built for
cad/cam several years ago but is still very fast for what I use it for.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Stephen Wille
Padnos
Sent: Thursday, August 23, 2007 3:33 PM
To:
Chris Mason wrote:
I'm fairly sure the video card is an oxygen. The system was built for
cad/cam several years ago but is still very fast for what I use it for.
It should work in the VESA/BIOS mode the boot CD uses, but it may not.
I don't think 3DLabs was ever very good with Linux
Chris Mason wrote:
How about switching out the video card?
That's a good option. Some old Matrox card (G400 or G450 are good, G200
is passable) would be excellent.
- Steve
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On Thu, 2007-08-23 at 17:24 +, ben lipkowitz wrote:
This really sounds like a perfect job for classicladder. If you arent
interested in learning ladder logic, then writing a custom hal component
might be easier, since you seem comfortable with C. I think the issue here
is that your
Kirk Wallace wrote:
On Thu, 2007-08-23 at 17:24 +, ben lipkowitz wrote:
This really sounds like a perfect job for classicladder. If you arent
interested in learning ladder logic, then writing a custom hal component
might be easier, since you seem comfortable with C. I think the issue
Hi all,
I have an application that needs (eventually) 4 axes.
Two are X and Y and the other pair need to track (rotationally) with
in a few degrees or better.
Rotational speeds are from zero to 1800 rpm for one axis and either
1:1 or 2:1 for the other.
The speed of rotation and the
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