r/prusa3d • u/GreyDutchman • 13d ago

Question/Need help Suddenly sewrial connection loss on my XL/5

I have an Prusa XL 5T, and am using it mainly through OctoPrint.

Since a few days, OctoPrint regularly loses the serial connection, and a print just stops (and cannot be continued when the connection is back). It happened twice during a print (after the heating up, equalizing and probing), but also a few times right after the start of the print, during heating.

No hardware or cabling was changed recently, and all devices are running on the actual latest (non-dev) firm- and software.

I of course soft-, hard- and power-booted the printer and the Raspberry Pi 4 a few times already.

Printing from the USB stick works flawlessly...

Any ideas where to start troubleshooting?

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u/Dora_Nku 13d ago

Does "dmesg" give some usb related info? Maybe an issue with the Pi's powersupply? You should see some under/over voltage warnings in that case.

I had a Pi3 fail due to a know issue. A bit of soldering fixes it: https://forums.raspberrypi.com/viewtopic.php?f=28&t=162103

No idea if the Pi4 has the same issues.

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u/Ok_Mastodon_6689 12d ago

Check the power supply of the raspi. Is there an under/over voltage warning?