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    Heater Fault

    Tuning and tweaking
    heater fault
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    • justinds89
      justinds89 last edited by

      Hello everyone!

      I just built a HyperCube Evolution with DuetWifi.

      I noticed that the hotend heater will steadily climb to about 200-210 and then start fluctuating before showing a heater fault.

      Could anyone please hello me figure out what could cause this or how to resolve this so I can print?

      Thanks!

      A Former User 1 Reply Last reply Reply Quote 0
      • Veti
        Veti last edited by

        have you done a pid tune?
        https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control

        1 Reply Last reply Reply Quote 1
        • justinds89
          justinds89 last edited by

          I have not. I will checkout the link you sent and see if I can't figure out how to do that.

          Hopefully that will solve the problem.

          1 Reply Last reply Reply Quote 0
          • A Former User
            A Former User @justinds89 last edited by A Former User

            @justinds89

            Can you add a screenshot of the "graph" on the Duet-Web-Conrol? Can you give some more info on type of heater & temperature-sensor (also it is a "heater-fault" usually the problem is either PID-tuning or the temperature-sensor...)

            1 Reply Last reply Reply Quote 1
            • justinds89
              justinds89 last edited by

              I will post a screenshot later when I can.

              I am using a 24v 40w heat cartridge and a E3D thermistor cartridge.

              Temp sensor is new and I have not done any PID tuning.

              I saw the wiki entry, but can anyone tell me how to properly PID tune the hotend?

              Not sure how to store the value or what to do with it.

              A Former User 1 Reply Last reply Reply Quote 0
              • A Former User
                A Former User @justinds89 last edited by A Former User

                @justinds89

                Well, basically you just copy and past those lines into the "g-code-console" if you think all your wiring is good and your heater/temp-sensor is in a state where you can "fire it up":
                https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control#Section_Setting_the_model_parameters_by_auto_tuning

                e.g. for firmware 1.18beta1 and later, it seems it states:

                M303 H1 S240 ; auto tune heater 1, default PWM, 240C target or maximum temperature
                M303 ; report the auto-tune status or last result
                M500 ; save results in config-override.g

                justinds89 1 Reply Last reply Reply Quote 0
                • justinds89
                  justinds89 @Guest last edited by

                  @lb Ah okay, so after running those commands there isn't anything I need to set in config.g or anything?

                  A Former User 1 Reply Last reply Reply Quote 0
                  • justinds89
                    justinds89 last edited by

                    Here's a current screenshot after PID tuning. I almost think it's worse...

                    0_1558388082412_Temp graph.JPG

                    Not really sure what could be causing this.

                    A Former User 1 Reply Last reply Reply Quote 0
                    • justinds89
                      justinds89 last edited by

                      It's kind of going steady right now, so maybe it's okay.

                      I will run a print and see what happens.

                      1 Reply Last reply Reply Quote 0
                      • justinds89
                        justinds89 last edited by

                        Spoke too soon.

                        0_1558388357862_Heater Fault.JPG

                        dc42 1 Reply Last reply Reply Quote 0
                        • siblues
                          siblues last edited by

                          I had similar issues with mine and it ended up being the wiring.The extruder movement was causing the connection to be lost for fractions of a second causing the dips in the graph.

                          1 Reply Last reply Reply Quote 0
                          • JamesM
                            JamesM last edited by

                            The wiring on the E3D thermistor cartridges are delicate. I went through a few before I realized I had to constrain the wires once installed so they wouldn't move\shake during printing. Once I did that I've been on the same one for about 2 months now without issue.

                            1 Reply Last reply Reply Quote 0
                            • justinds89
                              justinds89 last edited by justinds89

                              I've tried moving the wires all over and no blips in the graph, but once I start a print out may do it in just a few minutes or may take an hour. I don't get what it could be. Everything looks good.

                              I may just try swapping the thermistor out.

                              1 Reply Last reply Reply Quote 0
                              • siblues
                                siblues last edited by

                                Have you checked the plug that plugs into the Duet itself it may have a bad crimp on the terminal?

                                justinds89 1 Reply Last reply Reply Quote 0
                                • justinds89
                                  justinds89 @siblues last edited by

                                  @siblues

                                  Yes I did. I may just reterminate it again to role it out.

                                  1 Reply Last reply Reply Quote 0
                                  • siblues
                                    siblues last edited by

                                    Yeah if that doesn't rule out a bad connection then I would try another thermistor and see what happens.The thermistor is a cartridge type right?

                                    justinds89 1 Reply Last reply Reply Quote 0
                                    • justinds89
                                      justinds89 @siblues last edited by

                                      @siblues yes it is, I actually just swapped it out so we will see.

                                      1 Reply Last reply Reply Quote 0
                                      • jay_s_uk
                                        jay_s_uk last edited by

                                        Does it happen when your part cooling fan turns on? If so, run the PID tuning with the fan on 100%

                                        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

                                        justinds89 1 Reply Last reply Reply Quote 0
                                        • justinds89
                                          justinds89 @jay_s_uk last edited by

                                          @jay_s_uk It does it regardless if the fan is off or on and it does not change when I manually turn the cooling fan on.

                                          I plan on trying it out tonight with the new thermistor.

                                          1 Reply Last reply Reply Quote 0
                                          • A Former User
                                            A Former User @justinds89 last edited by A Former User

                                            @justinds89 said in Heater Fault:

                                            @lb Ah okay, so after running those commands there isn't anything I need to set in config.g or anything?

                                            I think you just have to check if you have a config-override.g in your /sys/

                                            You can also update by hand the vals thrown back in the console into your config.g (I would refer to it as "old style") but you can get tired of it over time, and I guess that is why you can automate all that by M500 that saves everything into the config-override.g...

                                            1 Reply Last reply Reply Quote 0
                                            • A Former User
                                              A Former User @justinds89 last edited by A Former User

                                              @justinds89

                                              Search the forum for "heater fault" and or "temperature sensor problem" or alike

                                              I remember posts with:

                                              • either cables/connectors loose -> check if errors get worse/more with heated up parts while moving all axis/motors...

                                              • capacitive coupling between components (mains-earth and dc-ground e.g.); -> get a torch or your mobile-phone-led and check all wirings again and again...

                                              • "bad" temperature-sensor with wrong internal heat-conductive-isolating-filler that was throwing errors only over a certain temperature <- to be sure that is the problem you would have to reproduce your error in total standstill, no moving motors. If the error is only above a certain temperature and NEVER below a certain temperature, you might just have bough one of these, where the mfgr took the wrong thermal paste I guess...

                                              EDIT: hot-glue with not-conductive "glue" (most of the time you can get a chep hot glue explicit for "wiring/cables", that is the one you want)

                                              1 Reply Last reply Reply Quote 1
                                              • dc42
                                                dc42 administrators @justinds89 last edited by

                                                @justinds89 said in Heater Fault:

                                                Spoke too soon.

                                                0_1558388357862_Heater Fault.JPG

                                                Sudden random changes in temperature indication like that indicate a problem in the temperature sensor or its wiring. Not connected with heater tuning at all.

                                                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

                                                1 Reply Last reply Reply Quote 1
                                                • justinds89
                                                  justinds89 last edited by

                                                  Thanks for all the help guys!

                                                  I swapped the termistor with another new one and so far it's been holding steady!

                                                  Hopefully that was the problem.

                                                  1 Reply Last reply Reply Quote 0
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