What is the problem?
This is frustratingly temperamental issue. Seemingly completely at random, and not that often, my print head just stops moving. Temps remain set. No retraction, no movement away from the print. When I open OctoPrint it seems to be stuck in a rapid cycle of "paused" "resuming" "printing" "paused" "resuming"...etc and is unresponsive. I have to restart to get it to work again. The printer is seemingly ready to go still awaiting a command i.e it holds all the temperatures and just sits there oozing and melting the part!
What did you already try to solve it?
This has been happening for 6 months at least. It doesn't happen that often but it can be on prints of any size at any stage of the print. If it fails and then I run exactly the same print again it will more than likely not fail a second time. I have tried a fresh install of Octoprint from a new image on a new SD card (and therefore upgraded Python). The problem has not got any better or worse from the addition or removal of add-ons although I have never run octorint with no addons at all.
I have not yet had the same problem when running the printer directly from the SD card - only ever via OctoPrint.
Have you tried running in safe mode?
no. as the problem is so sporadic
I'm hoping someone can direct me to the most appropriate log. I have looked in the "logging" section of OctoPrint and there is nothing stored from around about the time of the last time the fault occurred. My serial.log does not have anything in it and my octoprint.log only includes details from today. Is there something else? I have a timelapse video showing it but that's all I can see. Sorry. I must be missing something.
Additional information about your setup
browser.user_agent: Mozilla/5.0 (Windows NT 6.3; Win64; x64; rv:86.0) Gecko/20100101 Firefox/86.0
env.plugins.pi_support.model: Raspberry Pi 3 Model B Plus Rev 1.3
printer.firmware: Marlin Ultimaker2; Sprinter/grbl mashup for gen6