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Hi everyone,I’ve been looking for a suitable new industrial PC for LinuxCNC with Mesa (Ethernet-connected, 7i94), but the search is becoming frustrating.

There’s a lot of great information out there, but most recommendations point to older refurbished systems that are either no longer available here (Europe) or require a lot of BIOS tuning to get acceptable latency. I’d really prefer to avoid spending a lot of time testing different systems or diving deep into BIOS settings and latency tuning.

I’m already spending enough time figuring out the electrics, HAL setup, Python interface, and machine logic — so I’m really hoping to just buy one thing that works reliably and doesn’t add another rabbit hole to the project.

What I’m looking for is a currently available, new industrial PC that:

• Works reliably with LinuxCNC (using the preempt-rt kernel)
• Is known to perform well with Mesa over Ethernet (7i94)
• Doesn’t require deep tweaking to get good performance
• Is ideally fanless or low-noise and compact (DIN mountable is a plus, but not required)

Budget isn’t my biggest concern — I don’t mind spending a bit more if it helps me avoid hours of frustration and trial-and-error.

If anyone has experience with a specific model (e.g., something from OnLogic, Beckhoff, or Fitlet2-type devices) that works well without surprises, I’d really appreciate a recommendation.

Thanks!

No it's still the same. The first clip is in CSS mode. The signal is gradually tapering up and down when moving in 10mm moves. You can hear the spindle nearly stopping as it's tapering up or down, only when it levels out again it goes to the required speed.

The second clip is out of CSS mode and manually pressing the Jog buttons. The signal has sharp edges as it's going straight to the required speed instead of tapering up or down .

I still can't figure out why this is happening. My VFD requires a 0-10v input. I'll hook up an oscilloscope to the speed input on the VFD and see what's happening.

E-mail Adressen sollten mindestens etwas maskiert werden damit sie weniger von webcrawlern gefunden und für spam verwendet werden.

You could import the 'hal' library and create hal pins like this (example here is a digital input pin 'log-trigger'):
 

after launching linuxcnc and the logger this should show up as a hal pin:

 

You can add the actions for these pin to the 'update' function (example triggers a log on pin 'log-trigger' changing from 0->1)
:
 



 

Hallo Hermann
Danke für die Nachricht, ja das ist richtig. Das wäre schön wenn wir uns kennenlernen würden. Wie schon sooft geschrieben ich bin erst in LinuxCNC eingestiegen hatte keine Ahnung aber jetzt geht es schon besser. Das nächste ist jetzt die Werkzeuglängenmessung an der Reihe. Muß mich erst erkundigen wie man den Taster Baut, habe gesehen das schon was in der Visialisierung vorgesehen ist.
Vorher war ich mit Mach3 unterwegs.
Gruß Hans
PS: Meine E-Mail hat sich geändert  hans.lehr(at)gmx(punkt)at

My Ethercat Interface:

 

Bonjour ,
 apres quelque temps d 'arret , je continue sur la transformation de ma  fraiseuse fanuc o mate T.
 je voudrais avoir un temoin lumineux externe ,pour la mise en route et l 'arret de la broche , et aussi quand l 'outil doit etre changer.
je travaille avec linuxcnc 2.8.1.
 bonne journee
jf

If I press any of these buttons, their commands are executed, but Gmoccapy switches to MANUAL_PAGE instead of staying on the TOOL_PAGE.
 

MANUAL_PAGE:
 

I think I could fix it. But I don't know if that was intentional.

It's a good idea to set this permanently in Geany:
stackoverflow.com/questions/5287849/how-...e-in-geany-on-ubuntu

I tested the code yesterday and found that it's a good idea to go back to MANUAL_MODE:

You probably have tabs on that line instead of spaces.

@rbobey1989
"EDIT"  My bad, I jumped the gun and didn't pay attention that it was PWM... I saw the EL25"" models and responded too quiickly, yeah I am supprised there isn't any either...

Yes, there are pulse train terminals in the code already and have been for years.  Look for EL2521 models.  I have these and they work.

If you bought some other terminal, then here is the code to the 2521 so you can have something to work from.
scott laird link
linuxcnc-ethercat/src/devices/lcec_el2521.c at master · linuxcnc-ethercat/linuxcnc-ethercat · GitHub
sittner link
linuxcnc-ethercat/src/lcec_el2521.c at master · sittner/linuxcnc-ethercat · GitHub
Beckhoff link
EL2521 | EtherCAT Terminal, 1-channel pulse train output, incr. enc. simulation, RS422, 50 mA | Beckhoff USA


Also, those EL4032's are 12bit, the 4132's are 16 for when you are looking in the future.  The 4134 is also in the code for the last few years if you need to maximize terminal space... 
 

@Leuo_

Follow either of these two links and in the first post go down to PART 6 - LET’S SEE ETHERCAT WORK IN THE REAL WORLD .  There are detailed instructions on how to do the external Stop button and you should see how to do a start button also. 

Ethercat build from source - full instructions - LinuxCNC

Ethercat build from source instructions - Updated for 2024 - LinuxCNC

Hope it helps,
Robert

Thanks for your answer.
But Linuxcnc will coming up with an error:

 
 

hey scott, ive been playing with it for the last 2 weeks. I dont have much to show, but i think the environment switching is working kinda. im testing with a nucleoh743, from the debug it seems to be working but serial is messed, it seems i dont know how to do a define or something,

github.com/cakeslob/Remora-STM32H7xx-PIO...43/Src/main.cpp#L116

im not an expert but i think thats exactly what its supposed to look like (rpm changing as diameter changes). assuming those portions that are the straight lines are in between jog moves. I didnt see (or hear) any weird spindle speed drop outs like before thought. i am assuming you figured out the issue?