Nozzle and bed temp cuts off mid print

What is the problem?

Part way through a print, the nozzle and bed temps go to zero. Yet printer continues going (well tries to). This has happened 2 times in the past week. Using Cura and Snapmaker A250. The octoprint temp graph shows this drop, but there are no warnings, etc. Just keeps on (air) printing.

I don't know what is causing the temps to cut off, and would desperately like to resole this. But isn't there any setting in OctoPrint to stop, alert, etc. when such a situation occurs? I've looked through the plug ins, but only see things for over-temp, not under temp.

What did you already try to solve it?

Nothing, re-ran the print.

Have you tried running in safe mode?


Did running in safe mode solve the problem?


Systeminfo Bundle

browser.user_agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:90.0) Gecko/20100101 Firefox/90.0
connectivity.connection_ok: true
connectivity.enabled: true true
connectivity.resolution_ok: true
env.hardware.cores: 4
env.hardware.freq: 1500
env.hardware.ram: 3959984128
env.os.bits: 32 linux
env.os.platform: linux
env.plugins.pi_support.model: Raspberry Pi 4 Model B Rev 1.4
env.plugins.pi_support.octopi_version: 0.18.0
env.plugins.pi_support.throttle_state: 0x0
env.python.pip: 21.1.3
env.python.version: 3.7.3
env.python.virtualenv: true
octoprint.safe_mode: false
octoprint.version: 1.6.1
systeminfo.generator: systemapi

Additional information about your setup

Octoprint 1.6.1, Cura 4.9.1, Snapmaker V.12.1

Hello @tiw !

You missed the part that asked further things (you deleted them).
So I'm afraid, we cant do nothing more than guessing...

Hello, I updated the original post with missing info and added a screen capture.

Still needs more data.

  • Please enable Serial logging. (Wrench icon, Serial already has highlight, scroll down to and check Serial logging)
  • keep it activated and go on using your printer until said situation occurs again.
  • then, with the issue captured in the log, create a systeminfo bundle (footer of the webpage, entry to the right) which downloads as a .zip to your download dir.
  • upload said zip archive here.

I enabled serial logging. I will report back when/if the issue happens again. Thank you.