Re: [Emc-users] Max speed too fast

2007-08-23 Thread Manfredi Leto
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 / (

[Emc-users] Curve in place of square edges...

2007-08-23 Thread Tamas Konya
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:

Re: [Emc-users] EDM

2007-08-23 Thread Jim Register
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

Re: [Emc-users] help

2007-08-23 Thread Christopher Purcell
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

[Emc-users] Curve in place of square edges...

2007-08-23 Thread [EMAIL PROTECTED]
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

Re: [Emc-users] Curve in place of square edges...

2007-08-23 Thread Sam Sokolik
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

Re: [Emc-users] Curve in place of square edges...

2007-08-23 Thread Chris Radek
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

Re: [Emc-users] handwheel overrun

2007-08-23 Thread Stuart Stevenson
Gentlemen, That is the fix. thank you very much! :) :) Stuart - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files

[Emc-users] How Fast Are Pythons

2007-08-23 Thread Kirk Wallace
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Chris Mason
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

[Emc-users] intro and question about Jeff Epler's Etch CNC servo driver board

2007-08-23 Thread Sebastian Kuzminsky
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Chris Mason
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Stephen Wille Padnos
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 - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to

Re: [Emc-users] Curve in place of square edges...

2007-08-23 Thread Tamas Konya
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:

Re: [Emc-users] How Fast Are Pythons

2007-08-23 Thread ben lipkowitz
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

Re: [Emc-users] intro and question about Jeff Epler's Etch CNC servo driver board

2007-08-23 Thread Jeff Epler
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread [EMAIL PROTECTED]
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Stephen Wille Padnos
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Chris Mason
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

[Emc-users] Max speed too fast

2007-08-23 Thread Cecil Thomas
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Stephen Wille Padnos
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

Re: [Emc-users] Max speed too fast

2007-08-23 Thread Stephen Wille Padnos
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Chris Mason
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:

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Stephen Wille Padnos
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

Re: [Emc-users] loading emc-unbuntu

2007-08-23 Thread Stephen Wille Padnos
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 - This SF.net email is sponsored by: Splunk

Re: [Emc-users] How Fast Are Pythons

2007-08-23 Thread Kirk Wallace
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

Re: [Emc-users] How Fast Are Pythons

2007-08-23 Thread Stephen Wille Padnos
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

[Emc-users] synchronized axes.

2007-08-23 Thread Dave Engvall
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