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Indeed Dedeer, Beckhoff has recently released a series of PCs specifically for real-time Linux: www.beckhoff.com/en-us/company/press/twi...linux-r-2024-04.html

Differential signaling is more resistant to EMI generating false step/dir signals
but where there is enough EMI to actually damage components, a single ended
connection is more resistant to damage since common mode EMI (applied to both
+ and - signals) is mostly eliminated.

Single ended connections would be:

7I96S GND      DRIVE PUL-, DIR-
7I96S STEP+   DRIVE PUL+
7I96S DIR+     DRIVE DIR+

 

Is there some other device you can ping to see if the issue is the host or the FPGA card?

Le acabo de poner una pica de tierra al lado de la pata de la mesa en la parte de atras para tener tierra totalmente separada.

Me puedes confirmar lo de single ended.

Gracias

Hard to tell if this is a EPP interface issue or maybe a Mesaflash problem

Can you try:

Power up on alternate EEPROM (which should have a valid boot sector)

program FPGA via JTAG (NOT FLASH!)

Then try mesaflash again to write a standard EPP bitfile

If this does not work, a temporary workaround (if you are building you own firmware)
would be to write the flash via JTAG

Thank you, I will try and report

Sigi

Yes. I tryed. Result was the same

Did you try writing one of the standard supplied EPP bit files?

The official LinuxCNC 2.9.4 image for arm64 is installed on a Raspberry Pi 400. There are strange partial graphical glitches in browsers, such as some pages or partial horizontal section of the page not displaying properly, while the rest is fine.

This was tested with Firefox ESR, but Chromium was also installed, and for example, the settings page for Chromium never displays properly. It would appear the underlying text and buttons/links are present but not visible, except by sometimes mousing over them. 

The problem appears to be only in browsers, not other applications. Youtube in either browser is also unusable, with graphical glitches on the player controls (YT buttons like play/pause/settings are either invisible or look corrupt).

Similarly, when opening PDF documents in browsers, the control buttons along the top of the document for Zoom/Download/Save etc are often invisible, but still present if moused over.

Also, Youtube video playback is extremely laggy, and that is including after removing the isolcpu=2,3 option. The goal on the Pi is just to familiarize with LinuxCNC and set up configs, not to run machines on it, so I'm not too concerned about the latency penalty in this case.. 

Has anyone else experienced this problem? 

I had an old Bridgeport mill that had had heavy production use. After getting some level of proficiency with it, I was having BIG problems getting things to fit together. So, I'd make some device, and then in a different setup, make a cover with screw holes that were supposed to line up. They didn't! It turned out that the Acme (trapezoidal thread) screws were more worn in the center that at the ends.
This was enough so that there was a large positioning error when moving from one end of the screw toward the middle.
Tommy, so this machine has ONE servo motor and clutches to the various leadscrews? I've heard of such machines, but never seen one. That does kind of match the amount of electronics in the thing.
Jon

No it does not.  After unsucsessful firmwareI  I tried to boot from the second EEPROM (W3 in the low position). But Mesaflash not founded 7i90 and 2 leds glowed ( power and int ) opposit to 3 in first case.

Looks basically ok
Maybe the machine does not think its homed
You should be able to jog without homing by adding
the joint jog pins:


# ---Handrad-Signale zu Mesa Encoder - shared MPG---

net axis-selected-count <= hm2_7i80.0.encoder.03.count

# ---mpg signals---

# for axis x MPG
setp axis.x.jog-vel-mode 0
net selected-jog-incr => axis.x.jog-scale joint.0.jog-scale
net axis-select-x => axis.x.jog-enable joint.0.jog-enable
net axis-selected-count => axis.x.jog-counts joint.0.jog-counts


# for axis z MPG
setp axis.z.jog-vel-mode 0
net selected-jog-incr => axis.z.jog-scale joint.1.jog-scale
net axis-select-z => axis.z.jog-enable joint.1.jog-enable
net axis-selected-count => axis.z.jog-counts joint.1.jog-counts

sets selected-jog-incr 1.000000

Was gibt beim
ip a
in terminal?

Does the alternate EEPROM still have a valid image?
(that say mesaflash --readhmid works with)

Sorry, attached the wrong file...

This should be right: