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    Heater fault on heated bed because it's rising to slow.

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    Tuning and tweaking
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    • Exerqtorundefined
      Exerqtor @Exerqtor
      last edited by

      @exerqtor

      Didn't have time to test yesterday, so i just tried a heatup and :

      Error: Heater 0 fault: at 64.9°C temperature is rising at 0.4°C/sec, well below the expected 0.7°C/sec
      

      So i get the feeling the tuning outputs a higher than realistic heating rate to be honest.

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

        @arnold_r_clark

        I'm also seeing similar behavior since updating to 3.4.0b6 (from 3.3.0)

        My bed heater faults very often while initially warming up. And I can also clear the fault and continue heating, but very annoying.

        Re-running PID tuning did not improve the situation.

        SIamundefined gloomyandyundefined 2 Replies Last reply Reply Quote 0
        • SIamundefined
          SIam @pfn
          last edited by

          Hi,

          Try to use the half of the computed R value from the PID Tuning, This is how it works with my printer

          https://forum.duet3d.com/topic/25321/bed-heater-fault-3-4-b5

          Hypercube-Evolution-Hybrid, Piezo Orion, Orbiter
          Duet WiFi 1.02 or later + DueX5
          RepRapFirmware for Duet 2 WiFi/Ethernet 3.4.0beta4 (2021-09-27 11:30:36)
          Duet WiFi Server: 1.26
          Duet Web Control 3.4.0beta4 (2021-09-27)

          1 Reply Last reply Reply Quote 1
          • gloomyandyundefined
            gloomyandy @pfn
            last edited by

            @pfn There are quite a few fixes post beta6: https://github.com/Duet3D/RepRapFirmware/commits/3.4-dev

            Some of these may impact the problem you are seeing...
            https://github.com/Duet3D/RepRapFirmware/commit/37b4e02726993763b477181b6aa918089e2210b4
            https://github.com/Duet3D/RepRapFirmware/commit/1e0e6c99252dee6aa20194f212aca3be6e68415a

            0 dc42 committed to Duet3D/RepRapFirmware
            Fixed heater fault detection while heating up
            
            Also shortened the M307 response so that it fits in the reply buffer
            0 dc42 committed to Duet3D/RepRapFirmware
            Fixed bug in calculation of heater PID parameters
            pfnundefined Exerqtorundefined Gixxerfastundefined 3 Replies Last reply Reply Quote 4
            • pfnundefined
              pfn @gloomyandy
              last edited by

              @gloomyandy thanks for digging! looks like known issues that will be resolved in the next beta/rc

              1 Reply Last reply Reply Quote 0
              • Exerqtorundefined
                Exerqtor @gloomyandy
                last edited by Exerqtor

                @gloomyandy

                Well there you go, just have to adjust the heating rate until b7 / RC1 sees day then 🤣

                1 Reply Last reply Reply Quote 0
                • Gixxerfastundefined
                  Gixxerfast @gloomyandy
                  last edited by

                  @gloomyandy Thanks for the info.

                  I thought that my Nevermore carbon recirculation filter with fans was responisble for the heater errors.

                  Looking forward to the next beta release then 🙂

                  Voron V2.4 (#1317) with Duet 3 Mini5+ Wifi and 1LC v1.1 Toolboard
                  Voron V0.1 (#637) with Duet 3 Mini 5+ Wifi and 1LC v1.2 Toolboard
                  Ender 3 Pro with BTT SKR-2 + RRF

                  gloomyandyundefined 1 Reply Last reply Reply Quote 0
                  • gloomyandyundefined
                    gloomyandy @Gixxerfast
                    last edited by

                    @gixxerfast Just to be clear, I'm not saying that the above changes will fix the problem, just that some things have been changed! Will need to be tested with the next release I guess?

                    Exerqtorundefined 1 Reply Last reply Reply Quote 1
                    • Exerqtorundefined
                      Exerqtor @gloomyandy
                      last edited by

                      @gloomyandy said in Heater fault on heated bed because it's rising to slow.:

                      @gixxerfast Just to be clear, I'm not saying that the above changes will fix the problem, just that some things have been changed! Will need to be tested with the next release I guess?

                      @dc42 Guess this is something you could either confirm or deny?

                      1 Reply Last reply Reply Quote 0
                      • hestiahuangundefined
                        hestiahuang
                        last edited by

                        Heater 0 fault: temperature rising too slowly: expected 0.44°C/sec measured 0.21°C/sec

                        Build the new source code after Beta6, the same.

                        Heater 0 fault: temperature rising too slowly: expected 0.44°C/sec measured 0.21°C/sec

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

                          @hestiahuang did you run M303 heater tuning on the bed heater, and save the M307 result?

                          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

                          hestiahuangundefined 4 Replies Last reply Reply Quote 0
                          • hestiahuangundefined
                            hestiahuang @dc42
                            last edited by hestiahuang

                            @dc42
                            yes, I did. Ran Auto PID and saved, also restarted. But still failed, even I used bangbang mode, full speed, I mean.
                            f8407f95-69a0-4681-8397-802319220802-image.png
                            bf0bf4db-e9fe-45ab-8515-8d90cce13e5c-image.png
                            72158536-c695-4211-a59a-26ce79e18b35-image.png
                            After above, I got this too b68c20db-d126-466c-adc8-cf9f6680ff2d-image.png

                            Then I changed the code and built Beta7 version, everything looks good now.
                            I adjusted the factor 0.5 to small value simplely => RepRapFirmware\src\Heating\LocalHeater.cpp => Line#317 => if (actualTemperatureRise < expectedTemperatureRise * 0.5)
                            e27e72fe-a7b6-44b3-9d5d-16b07a445495-image.png

                            hestiahuangundefined 1 Reply Last reply Reply Quote 0
                            • hestiahuangundefined
                              hestiahuang @dc42
                              last edited by

                              @dc42 I guess this should be new good feature, it will be perfect if it is better to enlarge the limitation. Or can have parameter to set expected rate.

                              hestiahuangundefined 1 Reply Last reply Reply Quote 0
                              • hestiahuangundefined
                                hestiahuang @hestiahuang
                                last edited by

                                Need to resume my printer can print first, so I call it simple way...👼

                                1 Reply Last reply Reply Quote 0
                                • hestiahuangundefined
                                  hestiahuang @dc42
                                  last edited by

                                  @dc42
                                  Read from change history, issue is involved from Beta3 and keeping improving.
                                  01a9e47d-e50e-4db6-b176-f86da380e93e-image.png

                                  1 Reply Last reply Reply Quote 0
                                  • hestiahuangundefined
                                    hestiahuang @dc42
                                    last edited by

                                    @dc42
                                    similar topics
                                    https://forum.duet3d.com/topic/24842/rrf-3-4b3-bed-heater-fault/14?_=1639653214558
                                    https://forum.duet3d.com/topic/24809/3-4-0-beta-3-heater-0-fault/12

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

                                      @hestiahuang we have made changes in 3.4.0beta 7 that we believe resolve the majority of these cases.

                                      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

                                      hestiahuangundefined 1 Reply Last reply Reply Quote 0
                                      • hestiahuangundefined
                                        hestiahuang @dc42
                                        last edited by

                                        @dc42 You did great! Thank you so much!

                                        1 Reply Last reply Reply Quote 0
                                        • joekoundefined
                                          joeko
                                          last edited by

                                          now with beta7 i also get this error. with rrf 3.3 all was fine

                                          Exerqtorundefined 1 Reply Last reply Reply Quote 0
                                          • joekoundefined joeko referenced this topic
                                          • Exerqtorundefined
                                            Exerqtor @joeko
                                            last edited by

                                            @joeko
                                            Have you re tuned the heater after upgrading to b7? I haven't gotten around to test mine btw, so just asking out of curiosity 😋

                                            joekoundefined 1 Reply Last reply Reply Quote 0
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