Bug: No heating when resuming from Heater fault

  • Hello!
    I think I found a bug. You might know it better. 🙂

    I currently have the problem that my thermistor has a loose connection. When it gets loose while printing the print pauses and the heater is turned off (fault state). When I then click on the resume button the print continues but with a cold hotend since the heater is still shut off. That leads to printing with a jammed nozzle until end of print.

    Duet 2 Maestro Hardware
    Firmware Name: RepRapFirmware for Duet 2 Maestro
    Firmware Electronics: Duet Maestro 1.0
    Firmware Version: 2.02(RTOS) (2018-12-24b1)
    Web Interface Version: 1.22.6

    Is that a bug or am I missing a gcode script for resuming or so?

    Thanks and cheers!

  • Moderator

    Did you reset the temperature fault before resuming?


  • @phaedrux
    After I found out what the problem is I just click on the heater in web interface to reactivate it. What I would expect instead is that the resume button does this automatically as it also stops automatically. I also expect this, because the temperature sensor is already getting read again so that I already see the current temperature (at least when it is just a short off-contact duration).
    Alternatively to an automatic reactivation of the heater the GUI could warn you with the same warning level as for the initial heater fault that you are trying to print with a heater shut off.

    Nevertheless I too wasn't aware of the M562 command. Thanks for that hint! 🙂

  • Moderator

    I've never had many heater faults, so I'm not that familiar with their handling. But I think what you say is reasonable.

  • administrators

    You could add M562 and M116 to your resume.g file if you want to clear heater faults automatically.

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