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  • ContinenteCNC
29 Dec 2025 21:47 - 01 Jan 2026 21:30
PID Windup on the way down was created by ContinenteCNC
Hi folks!

The current PID hal module has a maxoutput pin to avoid integrator windup, but wasn't it supposed to have also a minoutput pin?

I am currently setting up a basic spindle control for a lathe and I am experiencing windup when I have to go from a higher spindle speed to a lower speed. On the way up it works just fine (well tuned)

Then I noticed that the PID output goes negative for a while during the ramp down, so the integrator is winding up to the negative side. This doesn't make sense from the DAC/VFD point of view, once the lower voltage they can handle is 0V. (I am using 0-10v analog control)

What I've just wrote make sense? Or am I just shaming myself publicly again? image missing /media/kunena/emoticons/silly.png
  • MaHa
29 Dec 2025 21:35
Replied by MaHa on topic EasyProbe
On my system I get this error, when i forgot to set M-code executable
  • RotarySMP
29 Dec 2025 21:34 - 29 Dec 2025 21:49
Replied by RotarySMP on topic Escalation of a Maho MH400E Retrofit (LinuxCNC + EtherCAT)
Very nicely laid out. My only advice would be to provision 20% extra terminals, especially grounds and 24VDC than you calculate you need.

I don't see a pendant. I am not familiar with that layout style from Solidworks, but you will certainly want a pendant. :)
And a fourth axis.
Cheers,
Mark


 
  • JT
29 Dec 2025 21:28
Replied by JT on topic 7i97t Mesaflash Problem
Did you install the required libraries with
Code:
sudo apt install libpci-dev libmd-dev pkg-config build-essential git

Typically you use sudo make install to build and install mesaflash.

gnipsel.com/linuxcnc/mesact/index.html

JT
  • JT
29 Dec 2025 21:25
Replied by JT on topic 7i97t Mesaflash Problem
Using translator
Hello everyone,
First of all, I'm a complete beginner with Linux.
I've converted an old milling machine using a Mesa 7i97t board and, thanks to this forum and other resources, I've managed to get everything working so far.
The original problem was that I couldn't control the analog outputs for the power amplifiers.
My guess was that the wrong firmware was installed on the Mesa board.
I tried to load the correct firmware, but it didn't work. I kept getting a message that it was unknown or something similar.
My guess was that the mesaflash version was too old.
I then tried to download the new version, as someone else here on the forum had success with version 3.5.10.
Then git was missing, and so on... After many, many hours, I've managed to get git and everything else installed again, as far as I can tell.
I now have the current Mesaflash package.
However, when I run the command `make` in the folder, I get the message: `pkg-config can't find libpci`.
When I try to install this, I get a message that cvs, perl-dbdabi-94, perlapi-5.32.0, and libc6 >= 2.38 are missing. (libc6 2.36-9 is installed)...

I'm completely stuck.
It's very possible that I've done several things wrong; I simply can't assess the situation properly.

I would be very grateful for any help!

I'm using LinuxCNC 2.8 and Debian 12.

Thank you!
  • dfarnainekl
29 Dec 2025 20:43 - 29 Dec 2025 20:45
Spindle Encoder: Float Precision Issues was created by dfarnainekl
Hello,

I have a spindle encoder set up (via EL5151) to output the position/angle as revolutions (float value), which get fed into spindle.0.revs.
I am also using a ddt component to calculate the speed and feed it to spindle.0.speed-in.
This seems to work well enough (the speed needs some filtering for low speeds though, as the time step of the ddt is rather small).

There is one aspect of this though that I don't quite understand, and where I am surprised that I can't seem to find much information about (and people who this causes issues for): float precision.
The raw encoder count gets converted to float revolutions by dividing by a float factor (either in the EL5151 or in the lcec component, I am not sure). If these values are also internally handled as float (which I understand is the case), this should cause issues with the limited float precision, when the spindle has accumulated lots of revolutions:
  • The absolute resolution (i.e. minimum step size) of the position becomes large. This makes the output of the speed ddt increasingly "jumpy", needing more low pass filtering to display steady numbers. This also makes spindle synchronized motion (e.g. threading) less accurate.
  • The small relative position error caused by the limited precision of the encoder factor becomes a large absolute position error. This makes spindle angle synchronized motion (especially those depending on the absolute angle) less accurate.
How are these issues typically dealt with in LinuxCNC? I can think of ways to avoid them using the raw encoder count and integer arithmetic, but I don't know how to properly do it with the mostly float-based components available in the HAL.

Best Ragards
Daniel
  • Routercnc
29 Dec 2025 20:41
EasyProbe was created by Routercnc
Hello,I installed EasyProbe following exactly video instructions.The probe itself is working correctly:
  • The probe signal works
  • G38 probing works without errors
  • The EasyProbe LED changes state correctly
However, I am facing an issue related to M130.When the option “Auto reload G-code / Clear plot” is enabled:
  • Clicking X0 Y0 Z0 R0 causes the error “Unknown M code used: M130”
  • Clicking Abort operation also triggers the same error
If I disable “Auto reload G-code / Clear plot”, the error does NOT happen when clicking X0 Y0 Z0 R0, but it still happens when aborting an operation.I am using:
  • LinuxCNC 2.9.4 (Debian 12 Bookworm, PREEMPT-RT)
  • EasyProbe installed exactly as shown in video
Could this be related to how LinuxCNC 2.9 handles remapped M-codes during auto-reload or abort events? Best regards,
Josias
  • PCW
29 Dec 2025 20:17
Replied by PCW on topic Linuxcnc 2.9.7 - Mesa 5i25 with HKD 5 AXIS MACH3 STEPPER I/FACE and 5i25_5ABOBx2
Did you verify that  the BOB has 5V power?
It needs both 5 and 12V power for operation,
5V for the step/dir outputs and 12V for the analog out and digital inputs
  • Cooped-Up
29 Dec 2025 20:14
Replied by Cooped-Up on topic Escalation of a Maho MH400E Retrofit (LinuxCNC + EtherCAT)
this is awesome. I am currently nearing the finish line on a MH800e retrofit. i used mesa cards and followed in the footsteps of rotarysmp and his documentation. this was a huge boost in feasibility as he had already done it. As the machine currently sits I could run a program but shift gears manually as I am still integrating auto shifting into the mix.

what issues did you have with the indramat?
  • automata
29 Dec 2025 19:27
Replied by automata on topic Ver 2.9.4 iso clean install Trouble when disabling EOE
Hi Hakan,
I have been able to wedge the double domain stuff into lcec_main.c and got a single yaskawa drive working with lcec_generic
For now I have made the double domain an option for the master. But I still need to check how to make it work only for yaskawa slave without affecting the other non-yaskawa slaves.
I'll try to wiggle that option into only the needed syncmanager or the required pdos.
Unlike fdarling, I did not need to disable fsoe part. So that part is good.
Will post more updates towards the end of the week.
-automata
  • Ozcnc
29 Dec 2025 19:04
Replied by Ozcnc on topic Linuxcnc 2.9.7 - Mesa 5i25 with HKD 5 AXIS MACH3 STEPPER I/FACE and 5i25_5ABOBx2
Breakout power option is off.
  • Ozcnc
29 Dec 2025 18:48
Replied by Ozcnc on topic Linuxcnc 2.9.7 - Mesa 5i25 with HKD 5 AXIS MACH3 STEPPER I/FACE and 5i25_5ABOBx2
Here is the files that were posted for it.

 
  • Robin123
29 Dec 2025 18:46
7i97t Mesaflash Problem was created by Robin123
Hallo zusammen, 
vorab ich bin absoluter anfänger mit Linux.
Habe eine alte Fräsmaschine auf eine Mesa 7i97t umgebaut und durch dieses Forum etc. Alles soweit zum laufen gebracht.
Das ursprüngliche Problem war das ich die Analog Outputs für die Endstufen nicht steuern konnte. 
Meine Vermutung --> falsche Firmware auf der Mesa.
Habe versucht die richtige zu laden, funktionierte nicht. Es kam immer eine meldung das es nicht bekannt war oder so ähnlich. 
Meine Vermutung  --> zu alte mesaflash version.
Habe dann versucht die neue Version zu laden, da bei jemand anderen hier im Forum es mit 3.5.10 funktioniert hat.
Dann war git nicht mehr da und so weiter .... habe nach vielen vielen Stunden git und alles andere wieder soweit ich beurteilen kann drauf.
Habe nun das aktuelle Mesaflash paket.
mit dem befehl -make in dem Ordner kommt aber die Meldung: pkg-config can't find libpci
Wenn ich nun Versuche dies zu installieren, kommt die Meldung das cvs, perl-dbdabi-94, perlapi-5.32.0 und libc6 >=2.38 fehlen. (libc6 2.36-9 ist installiert) ....

Ich komme dort irgendwie nicht weiter.
Es kann sehr gut sein das ich einiges falsch gemacht habe, kann das leider absolut nicht einschätzen.

Ich bin für jegliche Hilfe sehr Dankbar! 

Habe Linuxcnc 2.8, debian 12 

Danke!
  • MaHa
29 Dec 2025 18:24
Replied by MaHa on topic Disable pushbutton
That was easy to do, and it works exactly as desired. It is important for me to lock out this kind of potential risks.
Thank you for providing this information.
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