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    SSR stuck on???

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    Duet Hardware and wiring
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    • Phaedruxundefined
      Phaedrux Moderator @gnydick
      last edited by

      @gnydick I'm not familiar with your particular meter, but yes you'd set it to DC voltage in the range that would register 24v accurately. Touch + to + and - to -. Careful not to short anything else.

      Z-Bot CoreXY Build | Thingiverse Profile

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      • gnydickundefined
        gnydick @Phaedrux
        last edited by

        @Phaedrux yep, 24.1v 😞

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        • gnydickundefined
          gnydick @Phaedrux
          last edited by

          @Phaedrux can I use a different connection to trigger the SSR while I wait for the replacement?

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          • A Former User?
            A Former User
            last edited by A Former User

            If its not covered by warranty and you want to use the SSR anyway you might get away with soldering a wire from the gate on the bed FET and run that to the SSR input. (you may have to invert the output if you do)

            Edit: sure, can def use any of the fan outputs instead.

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            • gnydickundefined
              gnydick @A Former User
              last edited by

              @bearer any pointers on how to set that up? Would I just wire two of the pwm pins to the SSR and map the bed heater to that pwm?

              A Former User? 1 Reply Last reply Reply Quote 0
              • Phaedruxundefined
                Phaedrux Moderator
                last edited by

                Since the bed heater is being powered via SSR and the SSR input will accept lower voltage than VIN, you could use any other open heater or fan output with a little configuration.

                If the Duet came with the RailCore kit I'd seek a warranty claim.

                Z-Bot CoreXY Build | Thingiverse Profile

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                • A Former User?
                  A Former User @gnydick
                  last edited by

                  @gnydick said in SSR stuck on???:

                  @bearer any pointers on how to set that up? Would I just wire two of the pwm pins to the SSR and map the bed heater to that pwm?

                  i'd use the "ground" from a fan, that ground is pwm controlled by the duet and you can use any supply voltage, the one on the fan output is convenient though. then unmap the fan if needed and map the heater. I'm sure some of the wizzards can help with the config if needed

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                  • gnydickundefined
                    gnydick @Phaedrux
                    last edited by

                    @Phaedrux I am, but it will take time. I'd like to get everything else tested out while I wait.

                    dc42undefined 1 Reply Last reply Reply Quote 0
                    • dc42undefined
                      dc42 administrators @gnydick
                      last edited by

                      You can also use a spare heater output on the Duet or the DueX5.

                      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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                      • Phaedruxundefined
                        Phaedrux Moderator
                        last edited by

                        Here's the directions for using a chamber heater. It's the same principal. Using an alternate pin for controlling an extra heater. The only difference for you is that instead of defining a new heater 3, you'd be altering the configuration for heater 0 (the bed on duet 2)

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

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                        • gnydickundefined
                          gnydick @Phaedrux
                          last edited by

                          @Phaedrux thanks

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                          • jens55undefined
                            jens55
                            last edited by

                            It is highly unlikely that the SSR has failed since it is not stuck in the 'on' position. It is way more likely that there is a wiring error.
                            Are you aware that the positive line will always be high no matter if the heater is on or off?
                            Simply wiring the negative to ground will cause all these issues.
                            Verify the ruting of the two control lines.

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                            • gnydickundefined
                              gnydick @dc42
                              last edited by

                              @dc42 do I remap a pin to H0 or do map a different heater to "bed"? I'm kinda lost as to which direction to go.

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                              • dc42undefined
                                dc42 administrators @gnydick
                                last edited by

                                @gnydick said in SSR stuck on???:

                                @dc42 do I remap a pin to H0 or do map a different heater to "bed"? I'm kinda lost as to which direction to go.

                                If you are using RRF2 then use a different heater number. Use M140 with an H parameter in config.g to tell the firmware which one.

                                It's very usual to have a dud bed heater mosfet on a Duet. Is the bed heater LED on the Duet permanently illuminated too?

                                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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                                • whosrdaddyundefined
                                  whosrdaddy
                                  last edited by whosrdaddy

                                  @gnydick : If I look at your photo, I believe you made a wiring error, you have wires labeled "BED-SSR" connected to the VIN connector and wired VIN to the Bed output connector!!!! Please double check your wiring, diagrams can be found here

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                                  • dc42undefined
                                    dc42 administrators @whosrdaddy
                                    last edited by

                                    @whosrdaddy said in SSR stuck on???:

                                    @gnydick : If I look at your photo, I believe you made a wiring error, you have wires labeled "BED-SSR" connected to the VIN connecter an wired VIN to the Bed output connector!!!! Please double check your wiring, diagrams can be found here

                                    Well spotted!

                                    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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                                    • whosrdaddyundefined
                                      whosrdaddy
                                      last edited by

                                      I stared like 10 minutes at his photo and didn't see the error, thanks to @jens55's remark, it all made sense 🙂

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                                      • Phaedruxundefined
                                        Phaedrux Moderator
                                        last edited by

                                        Completely glossed over that one. Should have looked at the diagram.

                                        Z-Bot CoreXY Build | Thingiverse Profile

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                                        • Phaedruxundefined
                                          Phaedrux Moderator
                                          last edited by

                                          But my test asked to disconnect the bed wiring and test the terminals without an SD card present. Was that not actually carried out?

                                          Z-Bot CoreXY Build | Thingiverse Profile

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                                          • gnydickundefined
                                            gnydick @whosrdaddy
                                            last edited by

                                            @whosrdaddy yep, that was it! Thank you!

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