The firmware was the same, downloaded a month ago. The cable is provided 
by Mesa, no damage observed.

Today is even "funnier": the machine started to drift away, like user 
said, to go to completely different position than commanded in G-code.
This was observed at least four times. Two of them where going to the 
material - operator noticed and hit the Emergency button.

I think it is drifting away with the latest analog command DACs received 
and Enable signal state and all components: LinuxCNC, Mesa cards and 
servo drives are happy with it, not stopping anything and not issuing an 
error in a timely fashion.

You can see the videos and pictures by yourself. The user claims it is 
the same G-code, almost the same time, no HW / SW changes, cables also 
not touched. Maybe even without LinuxCNC restart:
https://www.youtube.com/playlist?list=PLMTctt_8ZIjX3eo2pw2IDmmH3Q34qZm83

The pictures of electric cabinet, cables, cards:
https://drive.google.com/drive/folders/0Bx5r7yxJ8GWDTVdvbnFxVFFyYmc?usp=sharing


04/24/2017 03:23 PM, Peter C. Wallace rašė:
> On Mon, 24 Apr 2017, Marius Alksnys wrote:
>
>> Date: Mon, 24 Apr 2017 13:52:55 +0200
>> From: Marius Alksnys <[email protected]>
>> Reply-To: "Enhanced Machine Controller (EMC)"
>>     <[email protected]>
>> To: [email protected]
>> Subject: [Emc-users] Had to re-flash Mesa 7i77 twice
>>
>> A month ago one machine with LinuxCNC and Mesa cards: one 5i25 and one 7i77
>> started bringing errors(1) each time program was started. Then I re-flashed
>> 7i77 using ./update_7i77 script from mesanet page. It fixed the problem..
>> till today. Today I got similar errors(2). And again, reflashing 7i77 fixed
>> the problem.
>
> If the error was not a complaint about the 7I77 firmware version being < 14,
> reflashing the card would not help. I suspect that there is  a signal
> integrity issue perhaps in the 5I25 PCI/system connection, as that set of
> errors looks like bad data at that interface.
>


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