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  • Lcvette
12 Mar 2026 16:04
Replied by Lcvette on topic QTPYVCP+VISMACH+LINUXCNC ROLLED INTO ONE?
we are revamping many things in the pyside6 version currently, 2 of the things being worked on is vtk and the gcode plotter. both are seeing some very big changes, so i will add this to the list of things to add some simulation functionality to.
  • Lcvette
12 Mar 2026 16:03
Replied by Lcvette on topic Add Buttons in Probe Basic
that's one you will have to sort from others as i have not used one of those usb type if that is what you are referring too. but i think some others have on here so may be some solutions to any issues further down the topics list! good luck and post any issues or solutions you find for others please!
  • Lcvette
12 Mar 2026 16:01
Replied by Lcvette on topic Probe Basic DRO display appears blank
glad your resolved!
  • Todd Zuercher
12 Mar 2026 15:37
Connect Siggen to Stepgen? was created by Todd Zuercher
I am working at tuning some older digital (step/dir command) servos, that don't have any auto tuning capabilities.  In order to avoid needing to use an  oscillo scope I would like to be able to connect a square wave siggen signal to the velocity command input of an unused stepgen on a 7i76eu (I also have a 5i85 for encoder feedback.)  I loaded the siggen, and made the hal connections, set all the parameters and enabled everything from halshow.  I can see the input for the stepgen's velocity-cmd changing, but I don't think any steps are being generated (no changes of any of the stepgen's count or feedback pins.  

Where am I going wrong?  Is this another situation where changes to parameter pins are only effective in a hal file at startup?

I was hoping to just create a little hal file that I can load manually after Linuxcnc was running to set tuning parameters then plug one of the drives step/dir plugs into the testing plug to run the tuning (moving them back to their regular position when running.)
  • TAKUYA
12 Mar 2026 15:17
Replied by TAKUYA on topic Ethercat random jitter fix
Ah okay gotcha.

Ill plot the mentioned signals this weekend when im back at the machine.
Latency on my host is ~20k with max jitter when opening mulitple tabs max 45k

would lowering/increasing the SyncCycles value help with this?
  • masawee
12 Mar 2026 08:10 - 12 Mar 2026 08:11
Replied by masawee on topic Trying out LinuxCNC on Raspberry PI5
but normal need use WHITOUT this expensive hat , only gpio pin out and shift level converter can use 3,3V gpio pin to out 5V and traight to driver step and dir and enable pin.
how this made if ewer newer not has understand anything code nd not understand what need doing code, understand only good all hardware how connect and build,
i have rpi4 and SD card have linuxcnc rpi4 image, working and boot ok, (whit HDMI display) but not boot whit pi hut mikro HDMI to vga cable.
how make this gpio pins can take out gpio pin to driver DM556. were can download setting hal and ini file or what need add to rpi4, normal peoples NOT can understand and write hard code to rpi, hal or ini or what possiple need doing, not know.
i just buy rpi4, paraller port BOB, cheap chinese 10$ board, encoder, rotary SW, shift level converter modules, 3,3V to 5V, all buttons, DM556 drivers, nema 23 470 OZ/3Nm motors, lot hardware but not can made code anything.

help need send to me files what need copy and paste to rpi4 linuxcnc and were folder need add. not know were and what and how.
  • grandixximo
12 Mar 2026 01:54 - 12 Mar 2026 02:01
Replied by grandixximo on topic LinuxCNC S-Curve Accelerations

hey guys

just wondering whats the latest on this.

cheers

andrew
 


Still work in progress

github.com/LinuxCNC/linuxcnc/pull/3807

you can read above, if anyone wants to test what's done so far, they can download the debs from github build artifacts
github.com/LinuxCNC/linuxcnc/actions/runs/22982518117?pr=3807
the above is today's build, scroll to the end of the page for the debs for the different systems, I think I got it to the point where it is in a good enough state for sim testing by the community
To test it set planner type 2, I have included a zip file in this post with my testing settings for planner type 2.
YangYang is refactoring the code, he put planner type 1 on pause because there are certain limitations with TP1 implementation, he cannot reach high speed on short segments.
TP2 will be the general base idea, but much needs to be refactored, the feed override needs to be reworked, kinematics TP and RT servo-thread need to be reworked, there is talk in the github about this, any extra mind is appreciated.
At the moment TP2 generally works, what's still missing from my implementation is spindle sync, I never tested probing or adaptive-feed.
as far as running gcodes and MDI, I believe everything works, but it is far from hardened, it is just me doing testing in a sim, if you put it on your machine, it is at your own risk, play with it in the sim, and let me know how it goes, here, in the gihub PR, or even on my github fork.
  • grandixximo
12 Mar 2026 01:40 - 12 Mar 2026 01:42
Replied by grandixximo on topic Ethercat random jitter fix
They are same

github.com/grandixximo/linuxcnc-ethercat

this just has one small optimization

dc-phased is latency dependent, can you plot in halscope, app-phase, pll-error, and servo thread?
  • tommylight
12 Mar 2026 00:14
Replied by tommylight on topic MPG Pendant
No.
USB pendant goes to USB on PC, not to Mesa.
  • LXcncforthewin
11 Mar 2026 23:53
MPG Pendant was created by LXcncforthewin
If i get a USB pendant, do i need to have an MPG interface on the controller board? (like the Mesa 7I76EU) or can i just use the USB communications into the LinuxCNC PC? Not sure if i need to connect the pendant to the PC or to the controller.
Any help would be appreciated.

Thanks.
  • rodw
11 Mar 2026 22:06
Replied by rodw on topic current latest download of LinuxCNC V2.9.8 will not install GRUB on several PC's
The Linuxcnc installer uses Bookworm (V12)
The Debian installer is currently Trixie (V1 3)
Trixie has better uefi support at boot

Linuxcnc installer uses Debian's Live Build which is the same as what Debian uses so its odd
so install Debian Trixie and type sudo apt install linuxcnc-uspace linuxcnc-uspace-dev to get v 2.94 (missing a few minor bug fixes)
Install Debian Sid (aka testing) do the same and get v 2.97 (missing one minor bug fix)
Follow this process  on Trixie or Bookworm and then follow the steps in the docs here to get 2.98 (current version)
linuxcnc.org/docs/stable/html/getting-st...th_preempt_rt_kernel
  • Badger1875
11 Mar 2026 21:52 - 11 Mar 2026 21:52
Replied by Badger1875 on topic AI generierter G-Code wird in LinuxCNC völlig verkrüppelt dargestellt...
Der verwendete Zeichensatz war UTF-8 und ich hatte auch mehrere Editoren ausprobiert, Überall wurde der Code passend interpretiert. Gedit direkt in Linux hat ihn auch ohne krytische Zeichen richtig angezeigt, nur im maschineneigenen G-Code Fenster kamen dann die wirren Zeichen zum Vorschein.

Ich hab mir anderweitig auch noch Hilfe geholt, und wir haben den Fehler gefunden.
Wie schon richtig vermutet, war ein Sonderzeichen Schuld an der Misere...
Allerdings nicht unsichtbar, sondern offen im Code zu sehen:
'-' ist im Editor klar zu lesen, aber effektiv gibt's da 3 Varianten davon, den Geviertstrich, den Halbgeviertstrich und den Bindestrich. Der letztere ist in der Darstellung ein Minus-Zeichen. Da die AI in den meisten Fällen (außer sie wird direkt aufgefordert ein anderes Format zu nehmen) Textfiles so generiert, dass sie für digitale Druckvorlagen genügen, kommt je nach Zusammenhang im Text, der Geviertstrich, vielleicht auch als 'em-Slash' bekannt, zur Anwendung.
Auf den ersten Blick fällt das nicht auf, aber wenn man ihn dann unmittelbar neben einem Minuszeichen sieht, kann man den Unterschied erkennen.
Ich hab dann meine Schnipsel diesbezüglich geändert und seitdem funktioniert es so wie es sein soll.

Danke für eure Hilfe und Gedanken!

Freddie
  • tommylight
11 Mar 2026 21:08
Replied by tommylight on topic current latest download of LinuxCNC V2.9.8 will not install GRUB on several PC's

I downloaded the official Debian installer image (not the LinuxCNC specific one) and it ran and installed absolutely fine, didn't even complain about missing firmware, grub installed fine, and it didn't even hiccup once.
That is/was my next question/tip/request/advice! :)
Thank you.
  • Xnke
11 Mar 2026 20:58
Replied by Xnke on topic current latest download of LinuxCNC V2.9.8 will not install GRUB on several PC's
CSM enabled does not make any difference for my install when using the LinuxCNC live USB image.

I downloaded the official Debian installer image (not the LinuxCNC specific one) and it ran and installed absolutely fine, didn't even complain about missing firmware, grub installed fine, and it didn't even hiccup once.

From here, I'll follow the normal install instructions for installing the preempt-RT kernel and linuxCNC from packages.
  • Becksvill
11 Mar 2026 20:34
Replied by Becksvill on topic LinuxCNC S-Curve Accelerations
hey guys

just wondering whats the latest on this.

cheers

andrew
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