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    750w AC bed with SSR25 relay.....slow heating

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    • imrjundefined
      imrj
      last edited by

      I have done the heater tunning, but still takes a while to heat up the bed , when I used marlin board it was like 4 times as fast, do I need to do anything special for accounting that is an AC 120V bed with SSR25 relay? the duet bed heater output just feeds the relay....

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      • dc42undefined
        dc42 administrators
        last edited by

        There is no reason why it should be significantly slower unless you have restricted the heater PWM. Please post your config.g and config-override.g files.

        Are you sure that the bed thermistor is reading the correct temperature?

        Duet WiFi hardware designer and firmware engineer
        Please do not ask me for Duet support via PM or email, use the forum
        http://www.escher3d.com, https://miscsolutions.wordpress.com

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        • mrehorstdmdundefined
          mrehorstdmd
          last edited by

          This calculator should give you a pretty accurate idea of how long it should take to heat the bed:
          https://jscalc.io/calc/uS8JYjYISgIvzJ1x

          If the bed is massive, it will take a few minutes to heat up.

          https://drmrehorst.blogspot.com/

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          • Karimundefined
            Karim
            last edited by

            I have a 16"x16"x/14" Mic 6 Aluminum plate, with keenovo 1000w 400x400mm 110v. Mine take about 4mins to get 110C.

            This is my Bed config
            ;Bed
            M143 H0 S120 ; Disable bang-bang mode for the bed heater and set PWM limit
            M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
            M307 H0 A204.4 C836.7 D1.5 S1.00 V24.3 B0 ; Set temperature limit for heater 0 to 120C

            fcwiltundefined 1 Reply Last reply Reply Quote 0
            • fcwiltundefined
              fcwilt @Karim
              last edited by

              @karim said in 750w AC bed with SSR25 relay.....slow heating:

              I have a 16"x16"x/14" Mic 6 Aluminum plate, with keenovo 1000w 400x400mm 110v. Mine take about 4mins to get 110C.

              This is my Bed config
              ;Bed
              M143 H0 S120 ; Disable bang-bang mode for the bed heater and set PWM limit
              M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
              M307 H0 A204.4 C836.7 D1.5 S1.00 V24.3 B0 ; Set temperature limit for heater 0 to 120C

              It seems to me your comments are out of place.

              Frederick

              Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

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              • Karimundefined
                Karim
                last edited by

                ;Bed
                M143 H0 S120 ; Set temperature limit for heater 0 to 120C
                M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
                M307 H0 A204.4 C836.7 D1.5 S1.00 V24.3 B0

                fcwiltundefined 1 Reply Last reply Reply Quote 0
                • fcwiltundefined
                  fcwilt @Karim
                  last edited by

                  @karim said in 750w AC bed with SSR25 relay.....slow heating:

                  ;Bed
                  M143 H0 S120 ; Set temperature limit for heater 0 to 120C
                  M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
                  M307 H0 A204.4 C836.7 D1.5 S1.00 V24.3 B0

                  OK that makes more sense.

                  Did you tune your bed heater?

                  Frederick

                  Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

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                  • Karimundefined
                    Karim
                    last edited by

                    Yea, I did the when I install it first.

                    fcwiltundefined 1 Reply Last reply Reply Quote 0
                    • fcwiltundefined
                      fcwilt @Karim
                      last edited by

                      @karim said in 750w AC bed with SSR25 relay.....slow heating:

                      Yea, I did the when I install it first.

                      OK good.

                      Has anything changed since you did that? Added a build surface? A piece of glass?

                      Frederick

                      Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

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                      • Karimundefined
                        Karim
                        last edited by Karim

                        I just have buildtak flex system. It was tune with this.

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