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Issues to switch ON / OFF the heated Bed

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  • undefined
    heinrich.platau
    last edited by 14 Jan 2021, 13:49

    Hi,

    I am using a Duet2 Ethernet Board with Firmware 3.2

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      heinrich.platau
      last edited by 14 Jan 2021, 13:54

      2021-01-14_14h52_17.png

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        fcwilt
        last edited by 14 Jan 2021, 14:13

        What is the voltage and wattage ratting of the bed heater?

        The only time I use an SSR is when the bed heater runs off line voltage.

        Frederick

        Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

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        • undefined
          heinrich.platau
          last edited by 14 Jan 2021, 14:15

          @fcwilt said in Issues to switch ON / OFF the heated Bed:

          What is the voltage and wattage ratting of the bed heater?
          The only time I use an SSR is when the bed heater runs off line voltage.
          Frederick

          The voltage is 24V (power supply, duet board and heated bed)
          The wattage from the heated bed is 850W. (400x400mm bed size)

          undefined 1 Reply Last reply 14 Jan 2021, 14:36 Reply Quote 0
          • undefined
            fcwilt @heinrich.platau
            last edited by 14 Jan 2021, 14:36

            @heinrich-platau said in Issues to switch ON / OFF the heated Bed:

            The voltage is 24V (power supply, duet board and heated bed)
            The wattage from the heated bed is 850W. (400x400mm bed size)

            Then it makes sense to take the load off of the Duet.

            It's a little hard to tell from the photo but the red lead from the power supply (positive) seems to be connected to the negative connection on the SSR and the positive connection on the SSR is connected to the bed heater.

            IF that is the case I think that is the problem - the connections to the SSR need to be reversed.

            Frederick

            Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

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            • undefined
              heinrich.platau
              last edited by 14 Jan 2021, 14:55

              Hi Frederick,

              Thank you very much. That worked out. Now I can switch the heated bed on and off.

              May I ask another question.

              When switching the heated bed on, after some seconds my duet board responds:

              ERROR: Heater 0 fault: temperatur rising much more slowly than expected 1.8°C/sec

              does that mean, that I have selected the wrong Thermistor Type in "configtool.reprapfirmware" ? Or is this a tuning question?

              undefined 1 Reply Last reply 14 Jan 2021, 15:01 Reply Quote 0
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                fcwilt @heinrich.platau
                last edited by 14 Jan 2021, 15:01

                @heinrich-platau said in Issues to switch ON / OFF the heated Bed:

                ERROR: Heater 0 fault: temperatur rising much more slowly than expected 1.8°C/sec

                Have you run the bed heater tuning procedure?

                Frederick

                Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                undefined 1 Reply Last reply 15 Jan 2021, 20:05 Reply Quote 0
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                  Phaedrux Moderator
                  last edited by 14 Jan 2021, 19:54

                  https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control

                  Z-Bot CoreXY Build | Thingiverse Profile

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                    heinrich.platau @fcwilt
                    last edited by 15 Jan 2021, 20:05

                    @fcwilt Thank you Frederick.

                    Now, after auto tuning, the heating bed works fine.

                    undefined 1 Reply Last reply 15 Jan 2021, 20:11 Reply Quote 1
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                      fcwilt @heinrich.platau
                      last edited by 15 Jan 2021, 20:11

                      @heinrich-platau said in Issues to switch ON / OFF the heated Bed:

                      @fcwilt Thank you Frederick.

                      Now, after auto tuning, the heating bed works fine.

                      Glad we were able to help.

                      Frederick

                      Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

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