MCU shutdown: timer too close - after I start a print (quite a heavy file)

Hi, any ideas what is wrong with my printer? Once I have started a big print job, klipper shuts down with this error (photo below). I have done a couple of small prints with no problem, so I assume the gcode file is too heavy (which would be weird in my opinion)

Dante Tango•10/31/24, 5:23 PM

I'm getting the same error now too

Dante Tango•10/31/24, 5:24 PM

Tried with two different pi's

DDante Tango I'm getting the same error now too

armearme.OP•11/1/24, 7:17 AM

Are you getting this error when trying to print a larger file? Because I am not getting this error if gcode size is up to 250 mb

armearme.OP•11/1/24, 7:18 AM

Other gcode size is 350 mb. That’s when I first got this error

armearme.OP•11/1/24, 12:05 PM

okay this might not be related to gcode size, because I just got an error again with a smaller gcode

Dante Tango•11/1/24, 12:47 PM

Yeah unrelated to size for me

DDante Tango Yeah unrelated to size for me

armearme.OP•11/1/24, 12:58 PM

That's really frustrating. @miklschmidt maybe you have some insights?

miklschmidt•11/1/24, 1:04 PM

So you guys can't print anything right now?

miklschmidt•11/1/24, 1:05 PM

@armearme. please post a debug zip

Mmiklschmidt So you guys can't print anything right now?

armearme.OP•11/1/24, 1:10 PM

I have managed to start the print once in the last 4-5 attempts. I also sometimes receive an error of "communication lost while homing" and similar.

Mmiklschmidt @armearme. please post a debug zip

armearme.OP•11/1/24, 1:10 PM

ratos-debug.zip672.14KB

armearme.OP•11/1/24, 1:14 PM

I just tried to start the same gcode one more time and looks like this time it worked. And I did not have these errors until I have started to test the printer with large parts (250 mb gcode)

miklschmidt•11/1/24, 1:15 PM

Hmm

miklschmidt•11/1/24, 1:15 PM

Can you show me a screenshot (or even better a video) of the live output of this:

ssh pi@ratos.local
htop

ssh pi@ratos.local
htop

After you've started a print ?

miklschmidt•11/1/24, 1:19 PM

In case it's a postprocessor issue, rebooting should help (at least to print smaller files). But it shouldn't run out of memory at this point, it should throw an error saying it can't post process the file instead.

It might not have anything to do with that however. There aren't really any obvious clues in the logs.

Mmiklschmidt Can you show me a screenshot (or even better a video) of the live output of this...

armearme.OP•11/1/24, 1:25 PM

idk now I have this:

armearme.OP•11/1/24, 1:25 PM

that's during the bed probing before print starts

armearme.OP•11/1/24, 1:27 PM

And this one after I press "home"'

armearme.OP•11/1/24, 1:30 PM

okay that's getting bad. I just pressed "home" once more after the "communication timeout during homing", printer probed the bed 3 times and then shutted down:

Aarmearme.okay that's getting bad. I just pressed "home" once more after the "communicatio...

miklschmidt•11/1/24, 1:34 PM

Did you reboot?

miklschmidt•11/1/24, 1:34 PM

Please show me the output of htop.

Mmiklschmidt Please show me the output of htop.

armearme.OP•11/1/24, 1:50 PM

I didn't understand, do I have to send that code via console after I start the print? or just after rebooting?

Aarmearme.I didn't understand, do I have to send that code via console after I start the p...

miklschmidt•11/1/24, 1:56 PM

Ah, sorry, i'll explain better. It needs to be run through

ssh

ssh

, so open the command prompt (i'm assuming you're on windows). You can do that by hitting win + rwin + r then type in cmdcmd and hit enter

miklschmidt•11/1/24, 1:57 PM

Then you write ssh pi@ratos.localssh pi@ratos.local. Replace ratos.localratos.local with whatever hostname you've given your machine.

miklschmidt•11/1/24, 1:57 PM

It'll ask you for a password, the default password is raspberryraspberry

miklschmidt•11/1/24, 1:57 PM

when you're in, you type

htop

htop

and press enter

miklschmidt•11/1/24, 1:58 PM

It'll show you a resource monitor, i need a screenshot or a video of that once you've started a print, preferably before or right around the time when you get the error on screen.

Mmiklschmidt Ah, sorry, i'll explain better. It needs to be run through `ssh`, so open the co...

armearme.OP•11/1/24, 2:05 PM

does not look right. What I am doing wrong?

Aarmearme.does not look right. What I am doing wrong?

miklschmidt•11/1/24, 2:07 PM

seems like you've connected via ssh before but have since reinstalled RatOS so it's gotten a new fingerprint

if you write notepad C:\Users\armin\.ssh\known_hostsnotepad C:\Users\armin\.ssh\known_hosts notepad should open, delete the line that has vc4.localvc4.local in it and save it. Then try again.

Mmiklschmidt seems like you've connected via ssh before but have since reinstalled RatOS so i...

armearme.OP•11/1/24, 2:09 PM

There are 2 lines with vc4.local. Delete both?