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  • grandixximo
  • grandixximo's Avatar
Today 02:03 - Today 02:06
Replied by grandixximo on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

For somebody trying hard to follow along from the sidelines, can you guys outline the objective for rolling back to 1.52 here?
Has anybody looked at the Igh Ethercat master 1.6 or even 1.7 which was released on gitlab 3 weeks ago (but not in their repositories) to see if it has these delays outside of linuxcnc.

It seems to me it would be unlikely that iGh master 1.6 or 1.7 are problematic as people would be complaining at iGh so to me,  the effort should be in understanding what has changed that linuxcnc-ethercat is not liking. Rolling back to a very old version does not seem a progressive step following the synchronisation enhancement.


Did it on pagagno-source request

Why don't we try installing Ethercat 1.5.2 on Trixie, so as to understand if the problem is on the kernel or Ethercat side.


This is just for testing, I pretty much knew it was a dead end when I started on this path, but it is just so we are all on the same page, I need to bring receipts, I won't simply hand wave his concerns, he wanted 1.5.2 on Trixie so that he will be convinced that is not the issue, and I gave him that. I don't want to come back to this point over and over again as we proceed with more testing, once it is proven that 1.5.2 does not solve the issue, we can move on to the next thing. Just trying to respect other people's perspective, call it an unnecessary waste of time if you want, I can see where you are coming from, but I feel the best approach is moving systematically one step at the time, clearing up all concerns, testing thoroughly, find agreement, move to the next thing.

1.6 and 1.7 present the same OP time delays in my testing.
  • cmorley
  • cmorley
Today 01:28
Replied by cmorley on topic Using Offsetpage Widget?

Using Offsetpage Widget?

Category: GladeVCP

Can you post your glade file?
  • grandixximo
  • grandixximo's Avatar
Today 01:17 - Today 01:20
Replied by grandixximo on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

Tested a bit.
I get fairly consistent loading times of lcec's rt_app_main() function of 1.85-1.90 seconds.
But but. In syslog I can see that the initial sync of slaves takes anywhere between zero and
say 3,4,5 seconds. 
To check
ethercat debug 1
start linuxcnc
exit or leave running, doesn't matter.
sudo journalctl --since "2 minutes ago" | grep "Sync after"
and see where it stops for every slave.
I reckon this is the problematic delay time.
Seldom, but it happens, I get "Checking for synchrony" and then it is satisfied directly and moves on.

It seems measuring the time of lcec's rt_app_main is not a good indicator.
Is there a good way of measuring time to OP?

trixie, 
Linux plasma 6.12.69+deb13-rt-amd64 #1 SMP PREEMPT_RT Debian 6.12.69-1 (2026-02-08) x86_64 GNU/Linux
IgH EtherCAT master 1.6.8 1.6.8.g2543cc5-1+27.3  (via apt)
linuxcnc-ethercat, a slightly modified version of commit bf13577ec7b1b54844e07a80d949232e71776b32
linuxcnc 2.9.4 (via apt)


At the end of my hal file I
loadusr halshow
and I save the default watch to display the OP pins, you can have master all-op, and each slave individual OP pin, I count Mississippies or use stopwatch...
Another alternative is
watch -n 0.2 ethercat sl
But this might "dirty" the bus, may effect OP time, maybe...
To get more accurate times might have to build a script, or use dmesg with some debug from ethercat.
But I think the difference papagno-source is talking about can be perceived with less precise tooling, in one case everything OP even before the UI opens, and in the other he has to wait some amount of time, so it is a difference in the seconds range.
I will try to setup similar setup to yours, and check the OP times.
  • rodw
  • rodw's Avatar
Today 00:49
Replied by rodw on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

For somebody trying hard to follow along from the sidelines, can you guys outline the objective for rolling back to 1.52 here?
Has anybody looked at the Igh Ethercat master 1.6 or even 1.7 which was released on gitlab 3 weeks ago (but not in their repositories) to see if it has these delays outside of linuxcnc.

It seems to me it would be unlikely that iGh master 1.6 or 1.7 are problematic as people would be complaining at iGh so to me,  the effort should be in understanding what has changed that linuxcnc-ethercat is not liking. Rolling back to a very old version does not seem a progressive step following the synchronisation enhancement.
  • rodw
  • rodw's Avatar
Today 00:37
Replied by rodw on topic HAL component for tangential knife

HAL component for tangential knife

Category: HAL

Looks pretty good. I'll have to check it so I don't miss anything. :)
Sorry, I've had to focus on other projects these last few days which I have almost completed, then record an overdue video for my Youtube channel, then I will get back to this.
  • grandixximo
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Today 00:37
Replied by grandixximo on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

I have installed linuxcnc-ethercat...0.9.5-retro1.5.2-rc1, without error, but if coomand ethercat version have reult 1.6.9
But I think, this is not the Igh part, but the lcec driver, right?
I have a version running in place in another directory, do I need to copy or link something to test?
On Debian 10 , in direcory bin the linuxcnc , i have only lcec_conf and not have lcec_coffingen
 

gitlab.com/grandixximo/ethercat/-/jobs/1...ad?file_type=archive
This is the igh ethercat, you need to uninstall your current ethercat master to get this to work, also ethercat-dkms and libethercat.
You might have to run or restart the ethercat service after installing the deb packages in the artifact.zip
 
sudo systemctl restart ethercat.service

for the linuxcnc-ehercat remove your current version
and install this
github.com/grandixximo/linuxcnc-ethercat...0.9.5-retro1.5.2-rc1
this is the lcec part, and it has both lcec_conf and lcec_coffingen
I cannot fathom why you would have one and not the other if you installed my packages.

I saw you tried to come to the discord, but you did not give a thumbs up to the rules message, so you were not allowed in.

I'm on +08:00 time. not in Italy. So mind the time difference. I'll only probably be available in the morning Italy time.
  • grandixximo
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Today 00:21
Replied by grandixximo on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

Syste is debian 10 buster x86_64
Kernel: 4.19.0-27-rt-amd64 #1 SMP PREEEMPT RT Debian 4.19.316-1 (2024-06-25) x86_64 GNU/Linux
Ethercat : IgH ETHERCAT master 1.5.2 unknow
Etherlabmaster-1.5.2+20190904hg33b922p8ea394
LINUXCNC 2.9.0-pre0


When axis opens the gui, the axis dimensions are already present. From tests done, when I had the same problem with debian 12, as soon as it reads the loadrt lcec command, the dimensions appear on the pins in hal, relating to the individual axes.

 
linuxcnc-ethercat version?
dpkg -l | grep linuxcnc-ethercat
 
  • bedouno
  • bedouno
Today 00:06
Replied by bedouno on topic HAL component for tangential knife

HAL component for tangential knife

Category: HAL

i hope to help with this analysis , it is made by AI, and this try to understand ,  

This browser does not support PDFs. Please download the PDF to view it: Download PDF

 
  • spumco
  • spumco
Today 23:23
Replied by spumco on topic MotionMaster Upgrade

MotionMaster Upgrade

Category: General LinuxCNC Questions 

I also don't understand from first principles what a reactor does. I think they are inductors to smooth out ripples in the outgoing current from VFD to spindle

If they're upstream of the VFD they're called 'line reactors' and smooth out incoming power ripples.

If they're downstream they're called 'load reactors' and smooth out the power to the motor.  Reduces heating in the motor, especially useful for older motors which aren't rated for VFD use and which are going to be run at speeds lower than nameplate rating.

Grease - you can flush out all the greased components with kerosene, then blow out excess with air, then regrease with whatever flavor you want.  Disconnect each grease circuit and flush each component separately - this will help identify any clogged or broken lines.  When you've cleared all the individual circuits out, flush any manifolds and header lines.
the X-axis is "grinding"

Could be from a number of sources.  Suggest disconnecting the ballscrew nut (or nut mount) from the X-carriage.  This will allow you to move the carriage by hand, as well as rotate the ballscrew in it's bearings, and also the nut on the ballscrew.  Should help you identify the source of crunchiness.
Ball bearings. Should I just put new ones in while I'm at it, or, do they last a lifetime?

Which bearings?  Your machine has quite a few.  Some are cheap, some are not.  Your wallet will determine what you can replace... but if the bearing is easily replaceable and remotely suspect, I'd replace it.  You can usually find NOS name-brand bearings on ebay for decent prices.
  • spumco
  • spumco
Today 23:01
Replied by spumco on topic FlexGUI - Multiple spindles?

FlexGUI - Multiple spindles?

Category: Flex GUI

Spindles are typically controlled through the NML interface by the GUIs, so if the GUI doesn't support multiple spindles you might have to use MDI to turn on and off the auxilliary spindles.

THat said, flexgui is mane to be flexible, so maybe there is suopport?
I haven't used it yet.
 

Thanks Andy.  I'm trying it out for the first time now.

All machine functions are already handled with hardware controls; I just want displays for all three spindles.  The only on-screen control which could cause machine movement of any type will be an MDI 'run' button.

I'm guessing FlexGUI is new enough that @JT hasn't had anyone bugging him about outlier configurations much.
  • rodw
  • rodw's Avatar
Today 21:32
Replied by rodw on topic retrofitting a Proxon for coin die milling

retrofitting a Proxon for coin die milling

Category: Milling Machines

See if you can add isolcpus=3 to your kernel boot file. I have done it on a pi but can't remember how
It should improve latency.
  • fer662
  • fer662
Today 21:14 - Today 21:15
Replied by fer662 on topic Sanitycheck my plan: ethercat + stepperonline A6

Sanitycheck my plan: ethercat + stepperonline A6

Category: EtherCAT

I hit buy on the servos this morning! My order was at the weight limit so i couldn't even add couplings to it and i'll have to place another for the extras, but i can use the us store for that and reship as well. Regarding the cables, of which i need at least 2 longer ones than they come with the motors, i'm guessing i can't chain them and i just have to replace with the longer version, right? Also, is the one for the servo with the break completely different?
  • 0x2102
  • 0x2102's Avatar
Today 20:43
Replied by 0x2102 on topic spindle-at-speed

spindle-at-speed

Category: Deutsch

Der VFD scheint in P02.10 nur eine feste Frequenz zu unterstuertzen. Damit koenne man wohl pruefen ob er z.B. eine Mindestdrehzahl hat. Z.B. 100Hz oder 6000UpM. Aber er kann wohl nicht vergleichen, ob die Vorgabe durch Spannung erreicht ist und dann erst schalten.

Wenn du ganz viel Langeweile hast, kannst du dir auch die ModBus Implementierung anschauen:

github.com/xsnoopy/LinuxCNC-Yalang-yl620...d?tab=readme-ov-file

Der RS485 Anschluss scheint stoeranfaellig zu sein. Ich wuerde das maximal zur Rueckmeldung der Drehzahl nutzen, nicht aber um die Spindel an und auszuschalten.

Falls du ModBus mal testen willst, nimm bitte einen USB / Serial zu RS485 Adapter mit A/B und GND (Masse). 120Ohm Widerstand am Ende der Verbindung nicht vergessen.
  • andypugh
  • andypugh's Avatar
Today 20:36
Replied by andypugh on topic Sanitycheck my plan: ethercat + stepperonline A6

Sanitycheck my plan: ethercat + stepperonline A6

Category: EtherCAT

The walkthrough attached to this post might also help:
forum.linuxcnc.org/ethercat/56545-step-b...shine-to-pi-5#331624
  • andypugh
  • andypugh's Avatar
Today 20:32
Replied by andypugh on topic Considering a Full Rewire on a Working Schaublin 125 CNC

Considering a Full Rewire on a Working Schaublin 125 CNC

Category: Turning

The trick to freeze the VFD PID when not on the limits might be to set maxerror to a very small number (actually = 0 means "no limit") using a mux component.
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