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Heated bed 2500 Watt + Duet3 6hc

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Duet Hardware and wiring
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  • undefined
    Phaedrux Moderator @dutti
    last edited by 25 Jun 2020, 02:21

    @barbarossa-cologne said in Heated bed 2500 Watt + Duet3 6hc:

    It's working but heating up needs a lot of time. How can I change this?
    23 to 60 degree needs 10 or more minutes

    Have you PID tuned the heaters and saved the results?
    https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control

    Z-Bot CoreXY Build | Thingiverse Profile

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    • undefined
      dutti
      last edited by dutti 25 Jun 2020, 11:53

      @Phaedrux
      I started 3D print 3 months ago. So I´m sorry when I don´t understand some code etc.
      Is this picture helpful?
      thanks for all

      PID.jpeg

      I have to say that this morning it was heating up a bit faster. I disconnected other things from the socket. But it is still slow.... SSR isn´t warm.
      the house is about 70 years old... maybe it is not enough power on the socket??

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      • undefined
        jens55
        last edited by 25 Jun 2020, 16:42

        Ahhhhh .... the guilty party is the PWM setting. You have set the heat pad to effectively be 250W!
        Calibration voltage 0.0V ???

        undefined 1 Reply Last reply 25 Jun 2020, 16:48 Reply Quote 0
        • undefined
          dutti @jens55
          last edited by 25 Jun 2020, 16:48

          @jens55
          Ok. Do you mean 2500 watt?
          How can I change this parameters ?

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          • undefined
            jens55
            last edited by jens55 25 Jun 2020, 16:54

            Remove the portion of your M307 command in config.g that says "S0.1"
            Run heater tuning again.
            The way you have things configured at the moment is that your heat pad is effectively 250W!

            undefined 1 Reply Last reply 25 Jun 2020, 17:23 Reply Quote 0
            • undefined
              dutti @jens55
              last edited by 25 Jun 2020, 17:23

              @jens55
              ok I understand.... with S1 or S0.5 its heating much fast,but it comes to a fault. ``temperatur rising much slowly than expected. 1.3.C /sec. (with S0.5 its 0.7c/ sec.)

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              • undefined
                jens55
                last edited by 25 Jun 2020, 17:34

                Default is S1 so just remove the portion that specifies 'S' or replace it with S1.0. You will want full power.
                You need to run heater tuning again in order to get rid of the warning message. You probably will see a message talking about being over - powered but that is expected. You need to understand what that means nad be aware of it but it's not a show stopper.

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                • undefined
                  jens55
                  last edited by jens55 25 Jun 2020, 17:36

                  What is the command you give to start the tune ?

                  undefined undefined 2 Replies Last reply 25 Jun 2020, 18:11 Reply Quote 0
                  • undefined
                    Stephen6309 @jens55
                    last edited by Stephen6309 25 Jun 2020, 18:11

                    https://duet3d.dozuki.com/Wiki/Gcode#Section_M303_Run_heater_tuning

                    undefined 1 Reply Last reply 25 Jun 2020, 18:29 Reply Quote 0
                    • undefined
                      dutti @jens55
                      last edited by 25 Jun 2020, 18:11

                      @jens55
                      With S.1 or nothing in the config.g the always comes to a warning:
                      ``temperatur rising much slowly than expected. 1.3.C /sec"

                      I mean I can skip the warning and start again. A few times and it's hot enough. So there are 2 options.

                      S0.1 = heating slow BUT NO warning ``temperatur rising much slowly than expected. 1.3.C /sec"

                      S1.0 or nothing: temperature rising fast but it comes to the warning:
                      ``temperatur rising much slowly than expected. 1.3.C /sec"

                      I use the button in the web control. I mean I used the configuration tool to setup heater etc.

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                      • undefined
                        jens55
                        last edited by 25 Jun 2020, 18:15

                        It is of course up to you if you use S0.1 or S1.0, you need to decide while keeping in mind the speed of warmup (and maximum temperature).
                        Forget about the warning message for now!

                        undefined 1 Reply Last reply 25 Jun 2020, 18:20 Reply Quote 0
                        • undefined
                          jens55
                          last edited by 25 Jun 2020, 18:20

                          It's been a while since I have done tuning so maybe someone else can chime in to give you details about how to get rid of the warning message.
                          Also, if the warning message results in the heater stopping to heat, then there is a problem. Again, I am not the right person to help out with that.

                          undefined 1 Reply Last reply 25 Jun 2020, 18:21 Reply Quote 0
                          • undefined
                            dutti @jens55
                            last edited by 25 Jun 2020, 18:20

                            @jens55
                            Ok.. but why does it come to a warning when it is faster? The warning tells its rising to slow..
                            Why does it care about it? Haha
                            Can I skip this warning forever or change the value for " it's to slow"?
                            THANKS

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                            • undefined
                              dutti @jens55
                              last edited by 25 Jun 2020, 18:21

                              @jens55
                              No worries. You already helped me. Thank you!!!!

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                              • undefined
                                jens55
                                last edited by 25 Jun 2020, 18:26

                                The system tries to guess what it should see in the temperature rise. If it sees something that it thinks is out of the norm, it tells you about it. There are numerous parameters than can be tweaked from the 'standard' tuning and modifying them would alter the way that Duet thinks what is or isn't normal.
                                As long as the system doesn't throw a hard error, you can disregard the error and just keep it in the back of your mind.
                                A hard error is one where the system stops heating because it thinks there is something seriously wrong.

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                                • undefined
                                  dutti @Stephen6309
                                  last edited by dutti 25 Jun 2020, 18:29

                                  @Stephen6309
                                  M303: Run heater tuning
                                  Parameters

                                  Hnnn heater number
                                  Pnnn PWM to use, 0 to 1 (you should normally use 1 i.e. full power), default 1
                                  Snnn target temperature
                                  Examples

                                  M303 H1 P0.4 S240 ; tune heater 1 using 40% PWM, target temperature 240C

                                  I made this with my date and it was fixed. Thank

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                                  • undefined
                                    jens55
                                    last edited by 25 Jun 2020, 18:33

                                    What you just posted is tuning for a nozzle heater.
                                    Again, just leave out the parameter that sets PWM (P) unless you know what you are doing.
                                    You should be running M303 H0 S60 or something in that area.

                                    undefined 1 Reply Last reply 25 Jun 2020, 18:34 Reply Quote 0
                                    • undefined
                                      dutti @jens55
                                      last edited by dutti 25 Jun 2020, 18:34

                                      @jens55
                                      I used the code with my specifications.
                                      M303 H0 P0.7 S65
                                      Sry

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                                      • undefined
                                        jens55
                                        last edited by 25 Jun 2020, 18:38

                                        I don't understand why you insist on putting in PWM figures but if it makes you happy (and if it it doesn't give you a warning message) then so be it. Just be aware that it results in less power to your heat bed and causes a longer warmup time.

                                        undefined 1 Reply Last reply 25 Jun 2020, 19:53 Reply Quote 0
                                        • undefined
                                          dutti @jens55
                                          last edited by 25 Jun 2020, 19:53

                                          @jens55
                                          25C - 60C
                                          S.1 = 78sec
                                          S.0.7 = 110 sec
                                          Both it's ok in my mind
                                          No warning. Thanks to. The tune was successful @Stephen6309

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