On Tuesday 17 December 2019 12:44:47 Dave Matthews wrote:
> On Tue, Dec 17, 2019 at 9:22 AM Peter C. Wallace
wrote:
> > You can get really bad base jitter if you try to run the base thread
> > faster than the machine is capable of responding (the latency-tests
> > default 40 KHz base thread is
On Tuesday 17 December 2019 13:41:09 Dave Matthews wrote:
> On Tue, Dec 17, 2019 at 12:55 PM andy pugh wrote:
> > On Tue, 17 Dec 2019 at 17:47, Dave Matthews wrote:
> > > For those of us in the cheap seats how does the base thread
> > > frequency relate to the maximum number of words per second
On Tuesday 17 December 2019 13:18:10 Eric Keller wrote:
> In the past, I have had a reasonable amount of luck reducing real time
> delays by building a custom kernel. Not sure if those kinds of gains
> are still possible. And it's a lot of work unless you are using
> realtime preempt.
>
> As
On Tue, Dec 17, 2019 at 2:00 PM John Dammeyer wrote:
>
> Actually I think it's at one pulse per two base periods. One to set the step
> signals high, one to set them low. The document referenced by "bari",
>
> How to choose your base period:
>
On Tue, 17 Dec 2019 at 19:00, John Dammeyer wrote:
>
> Actually I think it's at one pulse per two base periods. One to set the step
> signals high, one to set them low.
The parport driver offers a "reset" function that sets selected pins
back to zero. You can run this later in the thread than
n Dammeyer
> -Original Message-
> From: Dave Matthews [mailto:n36...@gmail.com]
> Sent: December-17-19 10:41 AM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Latency Warning Messages
>
> On Tue, Dec 17, 2019 at 12:55 PM andy pugh wrote:
> >
&
On Tue, Dec 17, 2019 at 12:55 PM andy pugh wrote:
>
> On Tue, 17 Dec 2019 at 17:47, Dave Matthews wrote:
>
> > For those of us in the cheap seats how does the base thread frequency
> > relate to the maximum number of words per second sent to the parallel
> > port?
>
> The system can send a
In the past, I have had a reasonable amount of luck reducing real time
delays by building a custom kernel. Not sure if those kinds of gains are
still possible. And it's a lot of work unless you are using realtime
preempt.
As far as Gene's problem with the beep, they are probably using the 8051
On Tue, 17 Dec 2019 at 17:47, Dave Matthews wrote:
> For those of us in the cheap seats how does the base thread frequency
> relate to the maximum number of words per second sent to the parallel
> port?
The system can send a maximum of one pulse per base period.
--
atp
"A motorcycle is a
On Tue, Dec 17, 2019 at 9:22 AM Peter C. Wallace wrote:
>
> You can get really bad base jitter if you try to run the base thread faster
> than
> the machine is capable of responding (the latency-tests default 40 KHz base
> thread is too fast for some systems so you might get considerably better
On Tue, 17 Dec 2019, andy pugh wrote:
Date: Tue, 17 Dec 2019 11:32:22 +
From: andy pugh
Reply-To: "Enhanced Machine Controller (EMC)"
To: "Enhanced Machine Controller (EMC)"
Subject: Re: [Emc-users] Latency Warning Messages
On Mon, 16 Dec 2019 at 23:42,
On Mon, 16 Dec 2019 at 23:42, John Dammeyer wrote:
> For example. The board in the machine at the moment generates a Servo Jitter
> of 33217 and Base Jitter of 131983.
That's fairly terrible.
Out of interest, how well does that machine work with Mach3?
--
atp
"A motorcycle is a bicycle
On Monday 16 December 2019 23:12:20 bari wrote:
> On 12/16/19 9:02 PM, Gene Heskett wrote:
> > intel cpus are better than equ dated amd's, my old quad core phenom
> > was phenominally bad at latency-test. 100+ microseconds. New 9th gen
> > 6 core i5, 4 or 5 microseconds. Till kmail beeps the
On 12/16/19 9:02 PM, Gene Heskett wrote:
> intel cpus are better than equ dated amd's, my old quad core phenom was
> phenominally bad at latency-test. 100+ microseconds. New 9th gen 6 core
> i5, 4 or 5 microseconds. Till kmail beeps the chassis speaker, then its
> 200 u-secs.
BIOS issues likely
On Monday 16 December 2019 21:17:40 John Dammeyer wrote:
> > > For example. The board in the machine at the moment generates a
> > > Servo Jitter of 33217 and Base Jitter of 131983.
> >
> > Thats pretty slow john, I'd take that machine to the office and
> > bring out the office machine. It
On 12/16/19 5:40 PM, John Dammeyer wrote:
>
> For example. The board in the machine at the moment generates a Servo Jitter
> of 33217 and Base Jitter of 131983.
> For the MESA and PP configuration I have:
> BASE_PERIOD = 24000
> SERVO_PERIOD = 100
>
> If I understood the document link
> >
> > For example. The board in the machine at the moment generates a Servo
> > Jitter of 33217 and Base Jitter of 131983.
> Thats pretty slow john, I'd take that machine to the office and bring out
> the office machine. It might just be faster. :)
>
Yes Gene,
I sometimes wonder if there
On Monday 16 December 2019 18:40:35 John Dammeyer wrote:
> > -Original Message-
> > From: bari [mailto:bari00...@gmail.com]
> > Sent: December-16-19 10:51 AM
> > To: emc-users@lists.sourceforge.net
> > Subject: Re: [Emc-users] Latency Warning Messages
> -Original Message-
> From: bari [mailto:bari00...@gmail.com]
> Sent: December-16-19 10:51 AM
> To: emc-users@lists.sourceforge.net
> Subject: Re: [Emc-users] Latency Warning Messages
>
> It depends on how you configure and run Linuxcnc with your intended
> ha
the MESA once the testing and development is done.
>
> John
>
>> -Original Message-
>> From: N [mailto:nicklas.karlsso...@gmail.com]
>> Sent: December-16-19 9:38 AM
>> To: Enhanced Machine Controller (EMC)
>> Subject: Re: [Emc-users] Latency
On Monday 16 December 2019 12:38:18 N wrote:
> > I bought 3 different low profile video cards to try and get rid of
> > that latency message. The ultimate and best solution was to buy the
> > MESA 7i92H. Does away with the parallel port completely. John
> > Dammeyer
>
> The parrallel port cause
nced Machine Controller (EMC)
> Subject: Re: [Emc-users] Latency Warning Messages
>
> > I bought 3 different low profile video cards to try and get rid of that
> > latency
> message. The ultimate and best solution was to buy the MESA 7i92H. Does
> away with the paralle
> I bought 3 different low profile video cards to try and get rid of that
> latency message. The ultimate and best solution was to buy the MESA 7i92H.
> Does away with the parallel port completely.
> John Dammeyer
The parrallel port cause latency messages?
On Mon, 16 Dec 2019 at 05:47, Thomas D. Dean wrote:
> Looks like the on-board video adapter shares main memory with the CPU.
> Linuxcnc system requirements says this is a no=no.
That advice might be outdated, I have many systems that seem perfectly
happy with this.
> Question: Will installing
le.com]
> Sent: December-15-19 9:46 PM
> To: 'Enhanced Machine Controller (EMC)'
> Subject: [Emc-users] Latency Warning Messages
>
> My CNC computer was purchased several years ago from Sherline with CNC
> installed.
>
> I have two disk drives. One has linuxcnc-2.7.14-wheezy.is
My CNC computer was purchased several years ago from Sherline with CNC
installed.
I have two disk drives. One has linuxcnc-2.7.14-wheezy.iso and the
other has linuxcnc-stretch-uspace-amd64.iso.
On both OS's, I see 'unexpected latency warning messages', infrequent on
'wheezy' and 99% of the
On Sun, 23 Jul 2017, dave wrote:
Date: Sun, 23 Jul 2017 10:37:09 -0700
From: dave <dengv...@charter.net>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.ne
ntroller (EMC)"
<emc-users@lists.sourceforge.net>
Subject: [Emc-users] latency excursions
dave@linuxcnc:~$ uname -a
Linux linuxcnc 3.4-9-rtai-686-pae #1 SMP PREEMPT Debian
3.4.55-4linuxcnc i686 i686 i386 GNU/Linux
task: 103857488 cycles, min=0.49, max=0.474214, avg=0.010993, 86
la
On Sunday 23 July 2017 11:48:19 dave wrote:
> dave@linuxcnc:~$ uname -a
> Linux linuxcnc 3.4-9-rtai-686-pae #1 SMP PREEMPT Debian
> 3.4.55-4linuxcnc i686 i686 i386 GNU/Linux
>
> task: 103857488 cycles, min=0.49, max=0.474214, avg=0.010993, 86
> latency excursions (> 10x expected cycle time of
On Sun, 23 Jul 2017, dave wrote:
Date: Sun, 23 Jul 2017 08:48:19 -0700
From: dave <dengv...@charter.net>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforg
For me this or something similar i happening one of my computers at every
startup. I think it is running smootly in between now but this have not always
been the case, I removed a graphics card a while ago and might have changed
things or simply a newer kernel.
On Sun, 23 Jul 2017 08:48:19
dave@linuxcnc:~$ uname -a
Linux linuxcnc 3.4-9-rtai-686-pae #1 SMP PREEMPT Debian 3.4.55-4linuxcnc
i686 i686 i386 GNU/Linux
task: 103857488 cycles, min=0.49, max=0.474214, avg=0.010993, 86
latency excursions (> 10x expected cycle time of 0.01s)
task: 25439189 cycles, min=0.49,
Hi pierre
the same was observed in my p4 asus 775i65G, really bad latencys on debian
pae kernels, dont know if its a kernel issue or anything, switch back to
10.04 agh.
regards
rck
2016-05-24 15:41 GMT-03:00 Forum Deswysen :
> Hello,
>
> i86 pentium 4
Hello,
i86 pentium 4 Fujitsu siemens scenic E600 :
with ubuntu 10.04 and 2.7 linuxcnc
*latency +/- 22,000 max*
I format the pc and i install debian 7 and 2.7 linuxcnc
*latency +/- 65,000 max*
Why do you have an idea?
Best regards,
Pierre
I was testing the latency of this computer and I thought that it was doing
pretty good, but over night there were some pretty significant latency spikes.
I was afraid this was going to happen, it is an HP-Compaq dc5750 and the bios
has virtually zero user settable power settings (the only thing
So i had some issued with drivers, but got around that by installing the
machinekit-rtai kernel
and then manually compile linuxcnc ontop of wheezy..
Well i dont think its optimal.
The setup is a Core i5, 8gb ram and running SSD drivers in a raid 0
configuration.
Lets say it boots like its on a
On 2/27/15 9:20 AM, Andreas Pettersson wrote:
But stock wheezy is 64bit and with the RT_PREEMPT kernel, you managed to
compile linuxcnc with that? All i get when trying that is No realtime
kernel present error.. :/
Yes, LinuxCNC runs fine on 64-bit RT-Preempt. You need the uspace
flavor,
: Re: [Emc-users] Latency issues; machinekit Kernel
But stock wheezy is 64bit and with the RT_PREEMPT kernel, you managed to
compile linuxcnc with that? All i get when trying that is No realtime
kernel present error.. :
The standard LinuxCNC wheezy ISO uses a RTAI kernel (and you can test
: [Emc-users] Latency issues; machinekit Kernel
But stock wheezy is 64bit and with the RT_PREEMPT kernel, you managed to
compile linuxcnc with that? All i get when trying that is No realtime
kernel present error.. :
The standard LinuxCNC wheezy ISO uses a RTAI kernel (and you can test latency
Sweet im gonna try that, having issues with PAE not claiming one of the
memory modules. =)
Thanks!
// A
Sebastian Kuzminsky skrev den 2015-02-27 18:26:
On 2/27/15 9:20 AM, Andreas Pettersson wrote:
But stock wheezy is 64bit and with the RT_PREEMPT kernel, you managed to
compile linuxcnc
So im guessing the step, where you do ./configure -a in the debian
folder is void and null when running the RT_PREEMPT kernel, because it
states there is no realtime kernel and refuses to configure.
In effect i cant figure out which packages i need to install other than
running the other
On 2/27/15 11:44 AM, Andreas Pettersson wrote:
So im guessing the step, where you do ./configure -a in the debian
folder is void and null when running the RT_PREEMPT kernel, because it
states there is no realtime kernel and refuses to configure.
In effect i cant figure out which packages i
On 2/27/15 11:17 AM, Andreas Pettersson wrote:
Sweet im gonna try that, having issues with PAE not claiming one of the
memory modules. =)
This is a bug in our pae kernel - it actually has pae turned off, so
you can only use the first 3.5 gigs or so.
I punished the guy responsible for that
Ah i see, i was considering rebuilding the kernel, so if this isnt
working i will do that.
But this could be useful to learn as well. - just reinstall for the 30th
time this day.. *lmao*
// Andreas
Sebastian Kuzminsky skrev den 2015-02-27 19:21:
On 2/27/15 11:17 AM, Andreas Pettersson wrote:
yeah i figured, i got it working and are stressing it now, i wrote this
for my own head - but will most likely google index pretty fast as well..
http://www.roughedge.se/blogg/2015/02/27/installing-linuxcnc-2-7-uspace-on-debian-wheezy/
Servothread 11347, Base thread 12665 while running
5
: Re: [Emc-users] Latency issues; machinekit Kernel
Are you running a standard Wheezy AMD64 install and the master buildbot
installations as well then??
I can always reinstall, i rather have a 64bit OS than the PAE version
anyday. =)
// A
Stock wheezy ISO works fine, I would try latency
17:09:10 +0100
From: Andreas Pettersson andr...@roughedge.se
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Latency issues; machinekit Kernel
Are you running
, 27 Feb 2015 15:58:08 +0100
From: Andreas Pettersson andr...@roughedge.se
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] Latency issues; machinekit Kernel
So i had some
: [Emc-users] Latency issues; machinekit Kernel
So i had some issued with drivers, but got around that by installing the
machinekit-rtai kernel
and then manually compile linuxcnc ontop of wheezy..
Well i dont think its optimal.
The setup is a Core i5, 8gb ram and running SSD drivers in a raid
If its stable running after 15min of basicly 100% cpu load - do i need
to bother running it any longer?
// Andreas
Sebastian Kuzminsky skrev den 2015-02-27 19:49:
On 2/27/15 11:44 AM, Andreas Pettersson wrote:
So im guessing the step, where you do ./configure -a in the debian
folder is void
On Fri, Feb 27, 2015, at 02:13 PM, Andreas Pettersson wrote:
If its stable running after 15min of basicly 100% cpu load - do i need
to bother running it any longer?
Is if 15 minutes of doing the same load thing over and over? Or doing a lot
of different things?
CPU loading usually doesn't
Ah well yeah the GPU was an issue, running the onboard in the i5 - but
giving it more resources helped alot.
For I/O i ran a create and move file around and delete script that uses
/dev/urandom and create, random sized file, gzips it, moves it a couple
of times to random folder and then
On 2/27/15 3:37 PM, John Kasunich wrote:
Stress it in a variety of ways - transfer large files on the network, drag
windows around, play a youtube video, run glxgears, walk away until the
screensaver and/or power management kicks in, etc.
Also try disk I/O and USB hotplug events.
--
Dave wrote:
You won't have any issues with the D525MW and an SSD on that Pico power
supply. I have used several and never had a failure yet.
Some have 3+ years on them now..running 24x7.
Yes, the D525MW is supposed to have a normal power draw of 13 W,
while a worst-case maximum test was
Message: 1 Date: Mon, 25 Mar 2013 15:25:31 -0400 From: Kent A. Reed
kentallanr...@gmail.com Subject: Re: [Emc-users] Latency problem To:
Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Message-ID: 5150a4ab.6050...@gmail.com Content-Type: text/plain;
charset=ISO-8859-1; format
continuing our dialog about the latency spikes bjørn is observing with his
Intel D525MW MB
On 3/28/2013 5:23 AM, bjørn wrote:
that I bought the power supply together with the D525MW board. here are a
link -
http://www.ebay.com/itm/160721043666?ssPageName=STRK:MEWAX:IT_trksid=p3984.m1438.l2649
snip
/I keep mulling over this 5-6 hours observation. I know we recommend
running the latency test for a long time but I don't think we understand
why these spiking events show up rarely. It's all well and good to blame
power saving features in modern CPUs but they are functioning over much
On Mar 28, 2013 2:58 PM, bjørn bj...@spesmek.no wrote:
snip
/I keep mulling over this 5-6 hours observation. I know we recommend
running the latency test for a long time but I don't think we understand
why these spiking events show up rarely. It's all well and good to blame
power saving
You won't have any issues with the D525MW and an SSD on that Pico power
supply. I have used several and never had a failure yet.
Some have 3+ years on them now..running 24x7.
Dave
On 3/28/2013 2:53 PM, bjørn wrote:
snip
/I keep mulling over this 5-6 hours observation. I know we recommend
On Mon, Mar 25, 2013 at 2:36 AM, Dave e...@dc9.tzo.com wrote:
Has anyone tried running the latency test on the Intel H61, H77, or Z77
design motherboards using a CPU with the integrated HD graphics?
Intel DH61AG + i3 2120T 2.6 GHz LGA1155
Am 20.03.2013 um 08:48 schrieb Bj?rn:
I bougt this.
http://www.ebay.com/itm/200542103383?ssPageName=STRK:MEWAX:IT_trksid=p3984.m1438.l2649
running the latest version of linuxcnc.
specifically which version?
I have a D525MW and get much better results
Hypertreading off in bios,
ISOLCPU is
Unless I am reading that incorrectly, that appears to be fine for a 1 ms
servo thread, but would not work well for direct stepper control.
The D525MW boards are really nice. I have used a lot of them over the
last year plus and I have a bit of stockpile built up right now, but the
Intel 525
On Mon, 25 Mar 2013, Dave wrote:
Date: Mon, 25 Mar 2013 11:01:45 -0500
From: Dave e...@dc9.tzo.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Latency
Unless
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Latency
Unless I am reading that incorrectly, that appears to be fine for a 1 ms
servo thread, but would not work well for direct stepper control.
The D525MW boards are really nice. I
I missed that board and the other integrated Celeron boards.Thanks
for pointing those out.
Let us know what you find. That Gigabyte board has a lot to like.
What AMD MITX boards are known to work well?
Dave
I think I'll order this one to try out today:
On Mon, 25 Mar 2013, Dave wrote:
Date: Mon, 25 Mar 2013 13:52:28 -0500
From: Dave e...@dc9.tzo.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: Re: [Emc-users] Latency
I missed that board and the other
On 3/25/2013 9:56 AM, Bjørn wrote:
snipping off previous discussion now i have tested: boot with isolcpu(big
improvement in general latency but still spikes)
turn of smi, (improvement in general latency but still spikes)
'idle=poll' and 'nohlt'(little or no effect)
acpi = off and api=off
Has anyone tried running the latency test on the Intel H61, H77, or Z77
design motherboards using a CPU with the integrated HD graphics?
A number of companies make them and they all seem to be socket 1155 boards.
The boards cost $50-$130 each and a 35 watt CPU runs about $80.
Thanks, Dave
On Sun, 24 Mar 2013, Dave wrote:
Date: Sun, 24 Mar 2013 19:36:47 -0500
From: Dave e...@dc9.tzo.com
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: emc-users@lists.sourceforge.net
Subject: [Emc-users] Latency
Has anyone tried running the latency test
I bougt this.
http://www.ebay.com/itm/200542103383?ssPageName=STRK:MEWAX:IT_trksid=p3984.m1438.l2649
running the latest version of linuxcnc.
Hypertreading off in bios,
ISOLCPU is done.
when runnnig latencytest and 3 x glxgears + some video i can run for 30
min and get:
servo thread (1.0ms) max
Am 20.03.2013 um 08:48 schrieb Bjørn:
I bougt this.
http://www.ebay.com/itm/200542103383?ssPageName=STRK:MEWAX:IT_trksid=p3984.m1438.l2649
running the latest version of linuxcnc.
specifically which version?
I have a D525MW and get much better results
Hypertreading off in bios,
ISOLCPU
Am 20.03.2013 um 08:48 schrieb Bj?rn:
I bougt this.
http://www.ebay.com/itm/200542103383?ssPageName=STRK:MEWAX:IT_trksid=p3984.m1438.l2649
running the latest version of linuxcnc.
specifically which version?
I have a D525MW and get much better results
Hypertreading off in bios,
ISOLCPU is
Regards Bjorn
I am running 10.04 LTS and LinuxCNC 2.5.2
when you say, boot the kernel with the option 'idle=poll' is this done
the same way as isolcpu?
yes
try both 'idle=poll' and 'nohlt'
see section 4 of http://wiki.linuxcnc.org/cgi-bin/wiki.pl?XenomaiKernelPackages
this applies
2012/3/31 Alwyn McLeod mcleod.al...@gmail.com:
When I run the latency test, I get Base thread jitter of 932659. In the
config file the max. is set at 50,000.
What You set in INI file is the length of the particular thread. I
guess that length of base thread is set at 50'000 ns and length of
The simple explanation is that is a lot of jitter. Look here to debug -
http://wiki.linuxcnc.org/cgi-bin/wiki.pl?TroubleShooting
I had a graphics card that ran at 200,000 when using the manufacturer 3d
driver, but down to 40,000 with software 3d.
On Sat, Mar 31, 2012 at 2:40 AM, Viesturs Lācis
On Sat, 2012-03-31 at 08:00 +0200, Alwyn McLeod wrote:
When I run the latency test, I get Base thread jitter of 932659. In the
config file the max. is set at 50,000.
When I load EMC2 I get a message Unexpected real time delay: check dmesg
for details' as well RTAPI: ERROR:Unexpected
On Sat, Mar 31, 2012 at 2:00 AM, Alwyn McLeod mcleod.al...@gmail.comwrote:
When I run the latency test, I get Base thread jitter of 932659. In the
config file the max. is set at 50,000.
Being a novice as far as Ubuntu is concerned, I am at a loss as to how I
can resolve these issues. Any
On Saturday, March 31, 2012 01:32:39 PM Kirk Wallace did opine:
On Sat, 2012-03-31 at 08:00 +0200, Alwyn McLeod wrote:
When I run the latency test, I get Base thread jitter of 932659. In
the config file the max. is set at 50,000.
When I load EMC2 I get a message Unexpected real time
that the
coffee pot is empty because the coffee machine had a problem downloading the
most recent bean roast sensing algorithm.
--- On Mon, 2/20/12, Jon Elson el...@pico-systems.com wrote:
From: Jon Elson el...@pico-systems.com
Subject: Re: [Emc-users] Latency - was Re: Which video card/driver for LinuxCNC
)
Subject: Re: [Emc-users] Latency - was Re: Which video card/driver for LinuxCNC?
the allocation of computing resources seems to be a recurring theme with pc
based machine controllers.
while i have wished for an accesible pocket calculator gui more than one time
while standing in front
On Tue, 2012-02-21 at 03:47 -0800, charles green wrote:
the allocation of computing resources seems to be a recurring theme
with pc based machine controllers.
while i have wished for an accesible pocket calculator gui more than
one time while standing in front of a machining center console,
It would be nice to know enough to debug latency issues, instead it feels
like kludging around with no idea what is the cause. I suppose rtai has
some tools if you know what you are doing.
On Tue, Feb 21, 2012 at 1:12 PM, Kirk Wallace
kwall...@wallacecompany.comwrote:
On Tue, 2012-02-21 at
On Tue, Feb 21, 2012 at 1:26 PM, Erik Friesen e...@aercon.net wrote:
It would be nice to know enough to debug latency issues, instead it feels
like kludging around with no idea what is the cause. I suppose rtai has
some tools if you know what you are doing.
Do they? It's been a while since I
On 20 February 2012 06:14, Jon Elson el...@pico-systems.com wrote:
Dropout wrote:
A quick question, does latency matter for servo drives?
Yes, absolutely. But, it is not as critical. For software stepping,
the base
thread is typically around 20 us, and so a jitter of even 5 us is more
2012/2/20 Roland Jollivet roland.jolli...@gmail.com
So the norm is that a stepper system can run off the parallel port, but for
DC servo's, extra hardware is required to sample the encoders.
My question is; if one built a headless system(no video) and disabled
drivers wherever possible,
2012/2/20 Roland Jollivet roland.jolli...@gmail.com:
My question is; if one built a headless system(no video) and disabled
drivers wherever possible, would such a system be fast enough to run DC
servo's and read the encoders on the parallel port?
As Andrew mentioned, for normal speed with
Roland Jollivet wrote:
My question is; if one built a headless system(no video) and disabled
drivers wherever possible, would such a system be fast enough to run DC
servo's and read the encoders on the parallel port?
You have to figure this out for each case. What is the maximum encoder
A quick question, does latency matter for servo drives?
Dropout.
On 2/19/2012 1:36 PM, Viesturs Lācis wrote:
2012/2/19 Alan Browningajbrowning2...@yahoo.com:
Thanks for the quick response. So you build your machines from the ground up
with new componenets? Due to budget limitations I have to
On Sun, 19 Feb 2012, Dropout wrote:
Date: Sun, 19 Feb 2012 13:45:41 -0500
From: Dropout drop...@sympatico.ca
Reply-To: Enhanced Machine Controller (EMC)
emc-users@lists.sourceforge.net
To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net
Subject: [Emc-users] Latency
@lists.sourceforge.net
Subject: [Emc-users] Latency - was Re: Which video card/driver for LinuxCNC?
A quick question, does latency matter for servo drives?
Dropout.
Well at some amount of latency it matters but servo systems will tolerate a
lot more latency than software step generation
Dropout wrote:
A quick question, does latency matter for servo drives?
Yes, absolutely. But, it is not as critical. For software stepping,
the base
thread is typically around 20 us, and so a jitter of even 5 us is more than
noticeable. But, on a typical servo system (or a stepper with
Gentle persons:
Andy Pugh's aside to Tom Easterday
I found that having a webcam tab causes realtime errors in my
otherwise well-behaved D510MO setup.
should be a reminder to all of us that the latency-test results we post
for different systems are not immutable. They may be helpful when
I need know how to calculate latency in EMC2's latency-test.
could anyone tell me the latency test's algorithm?
--
ThinkGeek and WIRED's GeekDad team up for the Ultimate
GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE
The latency-test runs the following realtime component:
http://git.linuxcnc.org/gitweb?p=emc2.git;a=blob;f=src/hal/components/timedelta.comp
Each time a realtime thread runs, the time interval del=(now-last) is computed.
The minimum and maximum del ever seen are computed in min_ and max_.
The
Hello...
I know that laptop's are not great for EMC, but I have few of them lying
around and wish to use it.
HP NX9005 work's now for longer time without some troubles. It has some
strange thing. The layency in 1'st few minutes (up to 5) is high(in
range 1ms). I don't know why but after that
Neil Baylis wrote:
OK, so I started up the computer, then waited 1/2 hour. Then I ran the
latency test for 1/2 hour with no abuse, and the latency was below 7
microseconds. I have plenty of other computers, so I certainly don't
need to be doing anything else on my EMC box when it's running
If the GUI latency test gives a result of how EMC will perform I always
wondered if abusing the computer during the test does not result in an
overly conservative number. I never use the computer that is running EMC
with any other program until the parts are done. (Am I the only one?) There
@lists.sourceforge.net
Date: Thu, 14 Jan 2010 07:05:49 -0500
Subject: Re: [Emc-users] Latency test numbers confusing
If the GUI latency test gives a result of how EMC will perform I always
wondered if abusing the computer during the test does not result in an
overly conservative number. I never use the computer
On Thu, Jan 14, 2010 at 4:05 AM, rng3 r...@verizon.net wrote:
If the GUI latency test gives a result of how EMC will perform I always
wondered if abusing the computer during the test does not result in an
overly conservative number. I never use the computer that is running EMC
with any other
2010/1/14 Евгений Александрович evgeni_a...@mail.ru:
Maybe the problem is CPU TERMAL TROLLING?
I tested one PC, which had BIOS without option to disable CPU TERMAL TROLLING.
I did not find any way how to use that PC with EMC2.
Sorry I don't know what that is. I guess it means my BIOS has no
1 - 100 of 156 matches
Mail list logo