The printer freezes during printing

[Stelio]

Printer Model

Voron 2.4

Extruder Type

Clockwork 2

Cooling Type

Stealthburner

Hello friends! I've been having an issue with my Voron 2.4 . During printing it just freezes in place, all the text on the display disappears and only the backlight stays on… I also lose connection to the Raspberry Pi 3 (can’t access it through the web interface). I noticed that the Raspberry’s temperature was around 65°C — I added a fan and it dropped to 40°C. I also checked its power supply and increased the voltage to 5.2V. I replaced the USB cable to the controller (Octopus Pro) — still no result. I don’t see any errors reported in the logs. I also changed the SD card. The printer is running the latest firmware updates. Usually after a restart it works normally. Sometimes it completes prints of 7–8 hours without issues, but the next time it may freeze after 1 or 4 hours… it just happens randomly. Could someone please give me some guidance on what the problem is and where to look for it.

 

[5twenty]

Sounds similar to a faulty wire losing communication.

 

[Darth Avocado]

Does It freeze as in, your stepper motors are still holding position but the UI and other functions are lost? Does the cooling fan on the hotend keep running?

What about your cable routing? Are any 120V wires near your display/raspberrypi/printer board?

And, how are you powering your raspberry pi? I use this USB Type C 12v/24v to 5v supply. It sounds like you maybe be using some sort of adjustable supply for your pi, and I used to have issues with my PI 4 until I got this dedicated power source. They can be VERY picky.

 

[individ]

I've had the same symptom as you on my Voron 0 with Raspbery Pi 3. If you run uname -a in the raspberry pi's terminal, what does it say?

My problems appeared after I had reinstalled the raspberry pi. I upgraded from 32 bit to 64 bit os. Turns out the performance took a real dip. It surprised me how bad it was. If I run a room fan next to the raspberry, I could scrape by and get a print out. Otherwise it locked up as soon as the temperature rose to about measly 40 degrees C (!). Wifi was lost and it was impossible to connect to it. Sometimes klipper would complain about the mcu timing instead.

Reinstalling again with 32 bit os made all these problems go away.

So I'd check that out and make sure it's a 32 bit os that's running.

 

[StefanT]

I know the OP has a Pi3. But for all those that might read this in the future. For Pi4+ 64bit is said to be faster than 32bit.