Re: [Emc-users] dahlih
Stuart Stevenson wrote: > good idea Jon > I will try that > although the program doesn't just move to the end of the g2 line - it > skips the g2 line completely and move directly to the end of the g1 > line that follows the g2 line > OK, now that you point that out, I see what you mean. Still, making arc moves in a plane other than the selected plane SHOULD flag an error, so bad behavior of the smoothing or something might be expected if wrong G-code was allowed through the interpreter. (Wrong in the sense that it is asking for arc moves not in the selected plane.) Since your G-code sample doesn't set the arc plane, that was the only thing I could imagine fouling things up. And, it would be revealing a bug, as that condition should get an error message. If you do get a message when you try it, then it would indicate that the wrong arc plane was NOT set by mistake or left over by a previous program, and then we have to look elsewhere, for a hard to reproduce problem. Just love searching for those! Jon -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Logitech Gamepad
Len Shelton wrote: >I followed that tutorial exactly. In fact, the way I got it to work was to >swap out the hal_input line with the hal_joystick line from: >http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?HereIsHowToCheck > >...and to rename the hal pins appropriately. > >Hal joystick works fine, but hal_input does not. > Could you either tell us exactly what you used to try to load hal_input, or post a log of what you did (in a terminal I presume) on http://pastebin.ca ? >I put EMC into debug mode >to watch what was happening, and it could not find the device by parsing the >lines that hal_input is supposed to be parsing. > > Uh, what exactly do you mean by "put EMC into debug mode"? There are several debugging facilities, so it's hard to tell which one(s) you mean :) Also, what version of EMC2, and what version of Ubuntu do you have? You should do testing with a halcmd prompt and maybe a short test.hal file (you can easily use halrun to start up the realtime system and take it down when you're done, just use "halrun -I " or "halrun -I yourtestfile.hal") You can use the program "script" to log what you do at the command line and the output from any programs you run. "script filename" will save a log of everything you do to "filename" until you type "exit". - Steve -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Logitech Gamepad
I followed that tutorial exactly. In fact, the way I got it to work was to swap out the hal_input line with the hal_joystick line from: http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?HereIsHowToCheck ...and to rename the hal pins appropriately. Hal joystick works fine, but hal_input does not. I put EMC into debug mode to watch what was happening, and it could not find the device by parsing the lines that hal_input is supposed to be parsing. >Len -Original Message- From: John Thornton [mailto:[EMAIL PROTECTED] Sent: Saturday, December 06, 2008 6:42 PM To: Enhanced Machine Controller EEMC" Subject: Re: [Emc-users] Logitech Gamepad I use the game pad and wrote an article on the steps I used to get it up and running here. http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Simple_Remote_Pendant What did you add to your .hal file use the gamepad? and which file did you add it to? John On 6 Dec 2008 at 7:51, Len Shelton wrote: > I have installed a Logitech Gamepad on my machine recently. I could > not get > EMC to recognize it using hal_input, but it works fine using > hal_joystick. > The error was that it could not find "Dual" even though I confirmed > it was > initializing as "Logitech Logitech Dual Action". I also tried > using > "Action", the product id, and the Phys string, but it would never > locate it. > Any ideas? > > > > >Len > > > -- > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, > Nevada. > The future of the web can't happen without you. Join us at MIX09 to > help > pave the way to the Next Web now. Learn more and register at > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visit > mix.com/ > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Logitech Gamepad
This looks interesting. Does it have to be that specific Logitech gamepad or will a generic XBox (original) gamepad work? Andy John Thornton wrote: > I use the game pad and wrote an article on the steps I used to get it up and > running here. > > http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Simple_Remote_Pendant > > What did you add to your .hal file use the gamepad? and which file did you > add it to? > > John -- Andy PGP Key ID: 0xDC1B5864 -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Logitech Gamepad
I use the game pad and wrote an article on the steps I used to get it up and running here. http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Simple_Remote_Pendant What did you add to your .hal file use the gamepad? and which file did you add it to? John On 6 Dec 2008 at 7:51, Len Shelton wrote: > I have installed a Logitech Gamepad on my machine recently. I could > not get > EMC to recognize it using hal_input, but it works fine using > hal_joystick. > The error was that it could not find "Dual" even though I confirmed > it was > initializing as "Logitech Logitech Dual Action". I also tried > using > "Action", the product id, and the Phys string, but it would never > locate it. > Any ideas? > > > > >Len > > > -- > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, > Nevada. > The future of the web can't happen without you. Join us at MIX09 to > help > pave the way to the Next Web now. Learn more and register at > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visit > mix.com/ > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] dahlih
On Sat, 2008-12-06 at 08:34 -0600, Stuart Stevenson wrote:
> Let me know what {and how :) }to do this.
Maybe start EMC from a terminal:
$ emc 1>1.txt 2>2.txt
This should redirect stdout and stderr to files. You can later look at
them in an editor, or view them as they are created in another terminal
with:
$ tail -f 1.txt
or
$ $ tail -f 2.txt
Hope you find out what's going on!
Thanks,
Matt
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Re: [Emc-users] Ethernet, rtai, and rtnet
Rafael Skodlar wrote: > You seem to like low cost stuff as quoted later but I doubt that you'll > find that together with Ethernet/CNC controllers. > > NXP, Atmel and a bunch of other outfits have $12 - 15 chips that have an ARM7 CPU and a 10/100 Ethernet port on one chip, with additional I/O. I make a line of parallel port-controlled motion interfaces. The driver currently (with a big thanks to John Kasunich!) almost builds a packet and interrogates the board, and then sends back a packet of commands. The architecture is half way there to doing this like you would over networking hardware. I think I could make a $50 "converter" that goes between the ethernet and the existing parallel port to control one or more of my boards. Later I could get rid of the parallel interface and go with just the Ethernet. > > > How do they coexist with parallel port or Mesa card for example? > The various devices are SEPARATE hardware, and therefore can be isolated. If all the SATA ports on a motherboard are on ONE chip, it may be impossible to isolate them. SATA is not intended for network-like communications, and is meant for very short runs. Ethernet has the VERY important feature of full electrical isolation, which should be quite helpful in making reliable systems. Jon -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] dahlih
good idea Jon I will try that although the program doesn't just move to the end of the g2 line - it skips the g2 line completely and move directly to the end of the g1 line that follows the g2 line On Sat, Dec 6, 2008 at 12:32 PM, Jon Elson <[EMAIL PROTECTED]> wrote: > Stuart Stevenson wrote: >> when the machine enters this state it will repeat the incorrect behavior >> >> > Maybe you need to find out what programs and operating steps your > operator was doing before the problem happened. Perhaps running the > same programs in sequence will cause it to get in the same state. I'm > thinking some sequence of modal commands has got something set in a > really wierd way. I can't think of any logical modal settings that > would do this. Oh, wait a minute! What about the arc plane? What > would EMC do if you set the arc plane to something OTHER than XY and > then give a G02 move with XYIJ words? Is that an error condition, or > does it blithely move to the commanded XY end position, but with no arc, > as the arc is going to be performed in, say, the XZ plane? I don't see > any G17, G18 or G19 in junk.txt to set the arc plane to a known state. > Could be easy to enter the wrong one by accident in MDI. > > Well, there are only 3 arc planes to run the code in, might be worth a > try in the two non-XY planes to see what it does. > > Jon > > -- > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. > The future of the web can't happen without you. Join us at MIX09 to help > pave the way to the Next Web now. Learn more and register at > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] graphiteone
There used to be nice videos showing use of graphite one. Does anyone know where I can find them again? Or does anyone have a user manual I can get. thanks. -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] dahlih
Stuart Stevenson wrote: > when the machine enters this state it will repeat the incorrect behavior > > Maybe you need to find out what programs and operating steps your operator was doing before the problem happened. Perhaps running the same programs in sequence will cause it to get in the same state. I'm thinking some sequence of modal commands has got something set in a really wierd way. I can't think of any logical modal settings that would do this. Oh, wait a minute! What about the arc plane? What would EMC do if you set the arc plane to something OTHER than XY and then give a G02 move with XYIJ words? Is that an error condition, or does it blithely move to the commanded XY end position, but with no arc, as the arc is going to be performed in, say, the XZ plane? I don't see any G17, G18 or G19 in junk.txt to set the arc plane to a known state. Could be easy to enter the wrong one by accident in MDI. Well, there are only 3 arc planes to run the code in, might be worth a try in the two non-XY planes to see what it does. Jon -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EMC 2.2.7 + 7i43 + Ted's sample, and same error than using EMC 2.2.6 + 7i43 + Ted's sample.... What now?
On Sat, 6 Dec 2008, Richard Acosta wrote:
Date: Sat, 06 Dec 2008 15:12:32 -0200
From: Richard Acosta <[EMAIL PROTECTED]>
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] EMC 2.2.7 + 7i43 + Ted's sample,
and same error than using EMC 2.2.6 + 7i43 + Ted's sample What now?
i'l'l try the lights when at home and tell the exact order.
The port is an onboard port in a via mainboard
Can you also tell me the motherboard type and cable length?
I'm chasing some timing/ noise problems in the FPGA and CPLD code
and duplicating your setup would be helpful here
El 06/12/08 13:02, Peter C. Wallace escribió:
On Sat, 6 Dec 2008, Richard Acosta wrote:
Date: Sat, 06 Dec 2008 03:14:13 -0200
From: Richard Acosta <[EMAIL PROTECTED]>
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] EMC 2.2.7 + 7i43 + Ted's sample,
and same error than using EMC 2.2.6 + 7i43 + Ted's sample
What now?
El 05/12/2008 07:35 p.m., Peter C. Wallace escribió:
On Fri, 5 Dec 2008, Richard Acosta wrote:
This may also indicate a inability to communicate with the card.
1. Is the card jumpered for EPP (W4 and W5 both in the 'down' position)
Yes.
2. Is the card powered properly (all three status LEDS = RED RED
YELLOW)
Should be on at power-up
Yes,
3. Is your parallel port set for EPP 1.9 mode?
Yes,
4. What kind of parallel cable do you have? We have done all of our
testing
with Flat cable.
Flat cable, when starting EMC2 lights flash an ready goes on after about
1 or 2sec
Ready?
What lights change?
There are three status lights on the 7I43: /DONE /INIT (both red) and
POWER (Yellow)
Also what type of parallel port do you have, Motherboard or PCI add-on?
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Re: [Emc-users] EMC 2.2.7 + 7i43 + Ted's sample, and same error than using EMC 2.2.6 + 7i43 + Ted's sample.... What now?
i'l'l try the lights when at home and tell the exact order.
The port is an onboard port in a via mainboard
El 06/12/08 13:02, Peter C. Wallace escribió:
> On Sat, 6 Dec 2008, Richard Acosta wrote:
>
>> Date: Sat, 06 Dec 2008 03:14:13 -0200
>> From: Richard Acosta <[EMAIL PROTECTED]>
>> Reply-To: "Enhanced Machine Controller (EMC)"
>>
>> To: "Enhanced Machine Controller (EMC)"
>>
>> Subject: Re: [Emc-users] EMC 2.2.7 + 7i43 + Ted's sample,
>> and same error than using EMC 2.2.6 + 7i43 + Ted's sample
>> What now?
>>
>> El 05/12/2008 07:35 p.m., Peter C. Wallace escribió:
>>> On Fri, 5 Dec 2008, Richard Acosta wrote:
>>> This may also indicate a inability to communicate with the card.
>>>
>>> 1. Is the card jumpered for EPP (W4 and W5 both in the 'down' position)
>>>
>> Yes.
>>> 2. Is the card powered properly (all three status LEDS = RED RED
>>> YELLOW)
>>> Should be on at power-up
>>>
>> Yes,
>>> 3. Is your parallel port set for EPP 1.9 mode?
>>>
>> Yes,
>>> 4. What kind of parallel cable do you have? We have done all of our
>>> testing
>>> with Flat cable.
>>>
>> Flat cable, when starting EMC2 lights flash an ready goes on after about
>> 1 or 2sec
>>
>
> Ready?
>
> What lights change?
>
> There are three status lights on the 7I43: /DONE /INIT (both red) and
> POWER (Yellow)
>
>
> Also what type of parallel port do you have, Motherboard or PCI add-on?
>
>
>
>
>>
>> --
>>
>>
>> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas,
>> Nevada.
>> The future of the web can't happen without you. Join us at MIX09 to
>> help
>> pave the way to the Next Web now. Learn more and register at
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>>
>> ___
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>> https://lists.sourceforge.net/lists/listinfo/emc-users
>>
>
> Peter Wallace
> Mesa Electronics
>
> (\__/)
> (='.'=) This is Bunny. Copy and paste bunny into your
> (")_(") signature to help him gain world domination.
>
>
> --
> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada.
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> pave the way to the Next Web now. Learn more and register at
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>
>
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> https://lists.sourceforge.net/lists/listinfo/emc-users
>
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Re: [Emc-users] Logitech Gamepad
I have not tried any other devices with hal_input, but I did carefully read, understand, and implement the UDEV rule set. I even chmodded 777 the rule set file to make sure it was readable. >Len -Original Message- From: Jeff Epler [mailto:[EMAIL PROTECTED] Sent: Saturday, December 06, 2008 9:39 AM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Logitech Gamepad Have you successfully used any devices with hal_input? If not, then carefully read the section "PERMISSIONS AND UDEV" in the hal_input manpage, and craft an appropriate rule for your device. Jeff -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Logitech Gamepad
Have you successfully used any devices with hal_input? If not, then carefully read the section "PERMISSIONS AND UDEV" in the hal_input manpage, and craft an appropriate rule for your device. Jeff -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] EMC 2.2.7 + 7i43 + Ted's sample, and same error than using EMC 2.2.6 + 7i43 + Ted's sample.... What now?
On Sat, 6 Dec 2008, Richard Acosta wrote:
Date: Sat, 06 Dec 2008 03:14:13 -0200
From: Richard Acosta <[EMAIL PROTECTED]>
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] EMC 2.2.7 + 7i43 + Ted's sample,
and same error than using EMC 2.2.6 + 7i43 + Ted's sample What now?
El 05/12/2008 07:35 p.m., Peter C. Wallace escribió:
On Fri, 5 Dec 2008, Richard Acosta wrote:
This may also indicate a inability to communicate with the card.
1. Is the card jumpered for EPP (W4 and W5 both in the 'down' position)
Yes.
2. Is the card powered properly (all three status LEDS = RED RED YELLOW)
Should be on at power-up
Yes,
3. Is your parallel port set for EPP 1.9 mode?
Yes,
4. What kind of parallel cable do you have? We have done all of our testing
with Flat cable.
Flat cable, when starting EMC2 lights flash an ready goes on after about
1 or 2sec
Ready?
What lights change?
There are three status lights on the 7I43: /DONE /INIT (both red) and POWER
(Yellow)
Also what type of parallel port do you have, Motherboard or PCI add-on?
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Re: [Emc-users] dahlih
Gentlemen,
Now would be the time to set the debug level where we want it. We
should be able to send the output to a log file, create a cron job to
(maybe tar and ) purge the log file and capture all events until the
next occurence. Hopefully the next occurence will 'occur' soon.
Let me know what {and how :) }to do this.
thanks
Stuart
On Sat, Dec 6, 2008 at 2:42 AM, Alex Joni <[EMAIL PROTECTED]> wrote:
>> If it ever happens again, crank up the debug level and run it again. It
>> would be good to know if the arcs don't get sent or if they just don't
>> get executed.
>>
>
> Also, in order for that to bring a usefull result, please remember to run
> emc2 from a terminal
> (I think even if you run it from a shortcut/launcher, you can tell it to run
> in a terminal).
> Otherwise the debug messages end up nowhere.
>
> Regards,
> Alex
>
>
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[Emc-users] Logitech Gamepad
I have installed a Logitech Gamepad on my machine recently. I could not get EMC to recognize it using hal_input, but it works fine using hal_joystick. The error was that it could not find "Dual" even though I confirmed it was initializing as "Logitech Logitech Dual Action". I also tried using "Action", the product id, and the Phys string, but it would never locate it. Any ideas? >Len -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Ethernet, rtai, and rtnet
> So does SAS and now SATA. The distances are not the same by default but > could be extended when needed. You and Marc Bodmer both talk about > expensive Ethernet industrial controllers. Who's going to buy "3/6 Axis > DC Servo controller (~900Eur)" for hobby or small shop use? > > It would be way less expensive to buy DIO, ADC, or DAC PCI card with > small PC box next to the CNC machine when PP is not available anymore. > > I thought that EMC is mainly for small installations with an occasional > large one. When you start talking about PLCs, SERCOS PCI-Board, etc. > that's another ball game. Nothing against it, just that a lot of people > will be left out. > I did not mean everybody should just go and buy those not so inexpensive 900Euro Axis controllers. Just wanted to show that there acutally exist some devices. And compared to the really expensive industrial devices this is actually not so much. I agree it's too much for hobby use, I would only buy it if there is no alternative. But neverthless it's an interesting device. More interesting than this 900Euro thing are the bus connection chips and controllers i have in my list. And they are actually not so expensive. This would allow to do some interesting and inexpensive stuff. I am not starting to talk about PLC. EMC does a good job in taking over this part. Even in industry plcs are disappearing more and more. Their job is taken over by SoftPLCs on the CNC PC - same as with EMC long ago. Most DIO/DAC/ADC PCI boards I know are way more expensive or at least not cheaper than those 900Euro, and then you still have no power stage and motor control yet. Both of these Buses can be driven by Software Masters. This means you can use any standard Ethernet controllers on the host as with RTNET. And there even exist Opensource Masters for EtherCAT. So you don't need PCI Boards. Since Ethernet controllers are in EVERY mainboard nowadays this is the same situation as with SATA. Many even have 2 controllers onboard. There is no additional HW on the host pc side. The SATA idea is an interesting one. I think it's just not very practical. And it is really impossible to buy anything anywhere. -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Ethernet, rtai, and rtnet
> There is no such thing as "Linux driver." Call it GNU/Linux RT driver > for Ethernet interface or whatever. That too needs to be isolated from > the regular Ethernet driver as you would need to isolate SATA-CNC driver > from the default SATA driver. Before making such statements, please read up on the way things are done in emc2 (and any other RTAI application that uses hardware access). Once a patched kernel exists there are basicly 2 different domains running on the same PC (the RTAI RT domain, and the linux domain). All linux drivers are available only to the linux domain. The emc2 code runs inside the RTAI domain, and has _no_ access to any linux drivers. That said, any hardware you want to support from emc2 needs special drivers that use only RTAI system calls. Such a driver exists for some ethernet cards (check RTNet), for serial ports (rtserial), for parport (a few actually, emc2 has one), for special hardware (check COMEDI and emc2 drivers). The fact that there is a RTAI driver for a piece of hardware doesn't mean that we can use it directly in emc2, but it means such a driver can be written to run in RT context (that means we can probably use it from emc2). The issues I see with SATA: * there is usually only one controller on the motherboard. that means you would need to access it from 2 different domains (to separate one port for RT). That will surely lead to problems, as the RTAI domain has higher priority and can preempt the linux domain at any time. The SATA/whatever controllers have some setup procedures before you can actually send/receive data from a certain port, so 2 domains will probably lead to problems. This can be fixed by using a separate SATA controller board, but that is way more expensive than an addon ethernet card. (remember the thread started because of people looking for alternatives for the cheap parport... people willing to invest modest amount of money already have enough solutions). * >> At the other end of the wire, you need an FPGA or embedded controller >> with an Ethernet interface. Such things are much easier to find than >> the same thing with an SATA interface. > > You seem to like low cost stuff as quoted later but I doubt that you'll > find that together with Ethernet/CNC controllers. That is the whole point of the thread. Some people are actually trying to build a device connected through Ethernet to emc2. It won't be a ethernet CNC controller, but part of it. emc2 will still do more than enough, but the ethernet gizmo will do the actual data output/input. (be it step/dir or pwm+encoders or whatever). >> >>> Case 2, SATA-CNC: >>> Implementation requires motherboard/Linux drivers combo with SATA >>> (always available), SATA/CNC adapter, and SATA-CNC driver. >> >> And a realtime SATA driver. And some way to keep the Linux driver from >> interfering with the realtime driver. Linux drivers are NOT realtime. >> > > Not all Linux drivers are RT of course. I never claimed that. Read above, "linux drivers are useless for emc2". NO linux driver is a RT driver. > That all depends on the driver. What's currently preventing SATA from > interrupting parallel port? RT scheduler. That's all. They don't talk to the same piece of hardware. The SATA driver runs in the linux domain, so when RT executes there is no way for the SATA driver to run. >>> There is almost always a spare (S)ATA port on the motherboard, but only >>> one Ethernet port which would better be used for default network >>> connections. >> >> It is extremely unlikely that a Linux driver for the filesystem and a >> realtime driver for the CNC will be able to coexist on SATA. >> > > How do they coexist with parallel port or Mesa card for example? Let me rephrase that: It is extremely unlikely that a Linux driver for the SATA controller and a realtime driver for the CNC will be able to work on the same SATA controller chip. > You mix file systems with interface driver. SATA drivers do not deal > with file systems directly. They send bytes of commands, status, and > data back and forth. You can format (S)ATA drives any way you want. > > What you forget is that drives are mechanical devices which could be > controlled real time with appropriate driver. Tape drive that changes > tape cartridges, connected to SATA bus, is much closer to a CNC machine > than any Ethernet card ever was. > >> An ethernet card is slightly cheaper than dirt. Newegg has 35 cards >> under $25, and 9 that are under $10. >> > > This is immaterial for this discussion. SATA is included in basic MB > price so it's cheaper than any Ethernet. > Only if you can manage to access it from both RTAI and linux at the same time without problems. > SATA was specifically designed to work with drives outside of the box > like SCSI does. The amount of data depends on programs and drivers just > like it does for Ethernet. that may be, but the point you are (probably willingly) overlooking is "industrial environment
Re: [Emc-users] dahlih
> If it ever happens again, crank up the debug level and run it again. It > would be good to know if the arcs don't get sent or if they just don't > get executed. > Also, in order for that to bring a usefull result, please remember to run emc2 from a terminal (I think even if you run it from a shortcut/launcher, you can tell it to run in a terminal). Otherwise the debug messages end up nowhere. Regards, Alex -- SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
