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    ST3Di Modelsmart 280 - Duet Maestro repair/upgrade

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    • Blacksheep99undefined
      Blacksheep99 @jay_s_uk
      last edited by

      @jay_s_uk said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

      what software does the printer originally run?

      No idea. I was able to get it working with Cura and outputting gcode based on marlin but that's it. There was no way to access the FW etc.

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      • jay_s_ukundefined
        jay_s_uk
        last edited by

        you may have to either take a punt on the thermistors as something like 3950's or 4092's.
        Other than that you'll have to change them so you know exactly what you they are.
        I've just had a quick google and nothing has come up.

        Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

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        • Vetiundefined
          Veti
          last edited by

          first measure the resistance at room temperature so that you can determine that it is a 100k ntc thermistor

          Blacksheep99undefined 1 Reply Last reply Reply Quote 0
          • Blacksheep99undefined
            Blacksheep99 @Veti
            last edited by

            @Veti said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

            thats the difficult part.

            is there any way you can get documentation as to what the exact model number is of the thermistor?

            Would there be anything on the part itself to provide a clue? I can go check.

            I changed the R25 number based on what I'd seen others use. On initial test of the bed heater it threw an error as heating too slowly. I ran autotune and it then would heat up to 80c without error. I've a lot to learn.....

            Vetiundefined 1 Reply Last reply Reply Quote 0
            • Vetiundefined
              Veti @Blacksheep99
              last edited by

              @Blacksheep99 said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

              I changed the R25 number based on what I'd seen others use.

              the settings are specific for your thermistor model.

              Blacksheep99undefined 1 Reply Last reply Reply Quote 0
              • Blacksheep99undefined
                Blacksheep99 @Veti
                last edited by

                @Veti to be clear, on the bed there are the power cables and then the thermistor cables right?

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                • Blacksheep99undefined
                  Blacksheep99 @Veti
                  last edited by

                  @Veti said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

                  @Blacksheep99 said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

                  I changed the R25 number based on what I'd seen others use.

                  the settings are specific for your thermistor model.

                  Understood, thanks.

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                  • Vetiundefined
                    Veti @Blacksheep99
                    last edited by

                    @Blacksheep99 said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

                    to be clear, on the bed there are the power cables and then the thermistor cables right?

                    that is normally the case

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                    • Vetiundefined
                      Veti
                      last edited by

                      can you post a picture of the thermistor?

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                      • Blacksheep99undefined
                        Blacksheep99
                        last edited by

                        bed4.jpg bed1.jpg bed2.jpg bed3.jpg

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                        • Blacksheep99undefined
                          Blacksheep99
                          last edited by

                          Each heater is 120x150mm

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                          • dc42undefined
                            dc42 administrators @Blacksheep99
                            last edited by

                            @Blacksheep99 said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

                            The probe\end stop has one but shared power circuits, the servo has a single feed to one pin with shared power, the hot ends have a single pin but share power also.

                            Shared +5V or +3.3v power and ground to the Z probe and the endstops is OK, if they use the same power voltage. Sharing power with the servo is also OK if they all need +5V power.

                            Shared +VIN power to two heaters is OK as long as the cable can handle the current for two heaters.

                            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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                            • Blacksheep99undefined
                              Blacksheep99 @dc42
                              last edited by

                              @dc42 said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

                              @Blacksheep99 said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

                              The probe\end stop has one but shared power circuits, the servo has a single feed to one pin with shared power, the hot ends have a single pin but share power also.

                              Shared +5V or +3.3v power and ground to the Z probe and the endstops is OK, if they use the same power voltage. Sharing power with the servo is also OK if they all need +5V power.

                              Shared +VIN power to two heaters is OK as long as the cable can handle the current for two heaters.

                              Thanks @dc42 I'll check the above. The two heaters are using the installed cabling so I should assume that it is up to the task. I am using the same PSU etc.

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                              • Blacksheep99undefined
                                Blacksheep99
                                last edited by

                                It has been mentioned in one of my other threads but worth me double checking. With my 24v psu I will need to change the fans on the printer to 24v also? the current ones are 12v. I think it's easier to replace than buy a converter?

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                                • jay_s_ukundefined
                                  jay_s_uk
                                  last edited by

                                  Either way to be honest.
                                  My preference is to use the correct voltage fans but other people are happy with buck converters

                                  Owns various duet boards and is the main wiki maintainer for the Teamgloomy LPC/STM32 port of RRF. Assume I'm running whatever the latest beta/stable build is

                                  Blacksheep99undefined 1 Reply Last reply Reply Quote 0
                                  • Vetiundefined
                                    Veti
                                    last edited by

                                    have you measured the resistance ?

                                    Blacksheep99undefined 1 Reply Last reply Reply Quote 0
                                    • Blacksheep99undefined
                                      Blacksheep99 @Veti
                                      last edited by

                                      @Veti said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

                                      have you measured the resistance ?

                                      169.1 Kohms If i read it correctly. That is at room temp which is cool today as there's no heating on at the moment in that room.

                                      Vetiundefined 1 Reply Last reply Reply Quote 0
                                      • Vetiundefined
                                        Veti @Blacksheep99
                                        last edited by

                                        modules:composer.user_said_in, @Blacksheep99, ST3Di Modelsmart 280 - Duet Maestro repair/upgrade

                                        That is at room temp which is cool today as there's no heating on at the moment in that room.

                                        which is about what temperature?

                                        Blacksheep99undefined 1 Reply Last reply Reply Quote 0
                                        • Blacksheep99undefined
                                          Blacksheep99 @Veti
                                          last edited by

                                          @Veti thermostat in that room says 12c

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                                          • Blacksheep99undefined
                                            Blacksheep99 @jay_s_uk
                                            last edited by

                                            @jay_s_uk said in ST3Di Modelsmart 280 - Duet Maestro repair/upgrade:

                                            Either way to be honest.
                                            My preference is to use the correct voltage fans but other people are happy with buck converters

                                            I think I side with you. I'll order some fans

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