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    M307 "bad model parameters" please help

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    chamber heating heated enclosure
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    • honeycrisundefined
      honeycris
      last edited by

      I am trying to tune a chamber heater.

      -Here is the output for M115:

      FIRMWARE_NAME: RepRapFirmware for Duet 2 WiFi/Ethernet FIRMWARE_VERSION: 3.2.2 ELECTRONICS: Duet WiFi 1.02 or later + DueX5 FIRMWARE_DATE: 2021-02-11

      -Here is my config file for this heater:

      M308 S7 P"duex.e6temp" Y"thermistor" T100000 B4138 ; configure sensor 7 as thermistor on pin e6temp
      M950 H7 C"duex.e6heat" T7 ; create chamber heater output on e6heat and map it to sensor 7
      M141 H7 ; map chamber to heater 7
      M143 H7 S100 ; set temperature limit for heater 7 to 100C

      -Whenever I run auto tune, I get the following error:

      Auto tune cancelled because temperature is not increasing.

      -I've tried to increase dead time using M307 so that the auto tune will work and here are the results:

      M307 H7 D200
      Error: M307: bad model parameters

      M307 H7 D300
      Error: M307: bad model parameters

      M307 H7 D500
      Error: M307: bad model parameters

      M307 H7 D6000
      Error: M307: bad model parameters

      Will adding more dead time fix my auto tune issues? What is with this "bad parameters" error?

      fcwiltundefined 1 Reply Last reply Reply Quote 0
      • fcwiltundefined
        fcwilt @honeycris
        last edited by

        @honeycris

        If you turn on the heater manually do you see the temperature increasing?

        Frederick

        Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

        honeycrisundefined 1 Reply Last reply Reply Quote 0
        • honeycrisundefined
          honeycris @fcwilt
          last edited by

          @fcwilt
          Yes. The temperature increases during the auto tune as well, but it's just a little slower than the auto tune will allow so the auto tune process cancels itself.

          It also increases when I just turn on the heater from web control.

          fcwiltundefined 1 Reply Last reply Reply Quote 0
          • fcwiltundefined
            fcwilt @honeycris
            last edited by

            @honeycris said in M307 "bad model parameters" please help:

            @fcwilt
            Yes. The temperature increases during the auto tune as well, but it's just a little slower than the auto tune will allow so the auto tune process cancels itself.

            It also increases when I just turn on the heater from web control.

            You reported that the error was:

            Auto tune cancelled because temperature is not increasing

            I can find no information on that error message.

            Perhaps @dc42 would know what is going on.

            Frederick

            Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

            honeycrisundefined 1 Reply Last reply Reply Quote 0
            • honeycrisundefined
              honeycris @fcwilt
              last edited by

              @fcwilt
              Any thoughts on the "bad model parameters" when trying to add more dead time?

              fcwiltundefined 2 Replies Last reply Reply Quote 0
              • fcwiltundefined
                fcwilt @honeycris
                last edited by

                @honeycris said in M307 "bad model parameters" please help:

                @fcwilt
                Any thoughts on the "bad model parameters" when trying to add more dead time?

                I'm doing some tests now.

                Will post soon.

                Frederick

                Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                1 Reply Last reply Reply Quote 0
                • fcwiltundefined
                  fcwilt @honeycris
                  last edited by

                  @honeycris

                  The largest value for D that is allowed under firmware 3.3.0 is 70.

                  I just tested D10, D20, D30, etc until I found the limit.

                  Frederick

                  Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                  Phaedruxundefined honeycrisundefined 2 Replies Last reply Reply Quote 1
                  • Phaedruxundefined
                    Phaedrux Moderator @fcwilt
                    last edited by

                    @fcwilt said in M307 "bad model parameters" please help:

                    The largest value for D that is allowed under firmware 3.3.0 is 70.

                    I think it may actually depend on what the other values are. Will have to get DC42 to answer for sure.

                    Z-Bot CoreXY Build | Thingiverse Profile

                    fcwiltundefined 1 Reply Last reply Reply Quote 0
                    • fcwiltundefined
                      fcwilt @Phaedrux
                      last edited by

                      @phaedrux said in M307 "bad model parameters" please help:

                      I think it may actually depend on what the other values are. Will have to get DC42 to answer for sure.

                      That well may be but the error message the OP was getting was the same error that I got when the value for D exceeded 70.

                      So it seems that he should determine if that is the problem by trying lower values.

                      Frederick

                      Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                      honeycrisundefined 1 Reply Last reply Reply Quote 0
                      • honeycrisundefined
                        honeycris @fcwilt
                        last edited by

                        @fcwilt
                        OK cool. that makes sense. I'm a she not a he just fyi.

                        fcwiltundefined 1 Reply Last reply Reply Quote 0
                        • honeycrisundefined
                          honeycris @fcwilt
                          last edited by

                          @fcwilt
                          I tried to change D to lower numbers and here are my results:

                          M307 H7 D30
                          Error: M307: bad model parameters

                          M307 H7 D60
                          Error: M307: bad model parameters

                          M307 H7 D69
                          Error: M307: bad model parameters

                          M307 H7 D70
                          Error: M307: bad model parameters

                          fcwiltundefined 1 Reply Last reply Reply Quote 0
                          • Phaedruxundefined
                            Phaedrux Moderator
                            last edited by Phaedrux

                            Can you share your full config.g and config-override.g files please?

                            Also the results of sending M122 and M98 P"config.g" may be helpful.

                            It probably won't help in this case, but your firmware is also out of date. Update by uploading this zip file to the system tab in DWC.

                            https://github.com/Duet3D/RepRapFirmware/releases/download/3.3/Duet2and3Firmware-3.3.zip

                            Z-Bot CoreXY Build | Thingiverse Profile

                            honeycrisundefined 1 Reply Last reply Reply Quote 0
                            • honeycrisundefined
                              honeycris @Phaedrux
                              last edited by

                              @phaedrux

                              M122
                              === Diagnostics ===
                              RepRapFirmware for Duet 2 WiFi/Ethernet version 3.3 (2021-06-15 21:44:54) running on Duet WiFi 1.02 or later + DueX5
                              Board ID: 0JD0M-9P6M2-NW4SJ-6J9DD-3SJ6J-KASRK
                              Used output buffers: 3 of 24 (16 max)
                              === RTOS ===

                              M98 P"config.g"
                              HTTP is enabled on port 80
                              FTP is disabled
                              TELNET is disabledconfig-override.g config.g

                              1 Reply Last reply Reply Quote 0
                              • fcwiltundefined
                                fcwilt @honeycris
                                last edited by

                                @honeycris said in M307 "bad model parameters" please help:

                                @fcwilt
                                OK cool. that makes sense. I'm a she not a he just fyi.

                                That's marvelous!

                                Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                                1 Reply Last reply Reply Quote 0
                                • fcwiltundefined
                                  fcwilt @honeycris
                                  last edited by

                                  @honeycris said in M307 "bad model parameters" please help:

                                  @fcwilt
                                  I tried to change D to lower numbers and here are my results:

                                  M307 H7 D30
                                  Error: M307: bad model parameters

                                  M307 H7 D60
                                  Error: M307: bad model parameters

                                  M307 H7 D69
                                  Error: M307: bad model parameters

                                  M307 H7 D70
                                  Error: M307: bad model parameters

                                  Interesting.

                                  I cannot test under the version of firmware you are using as all of my printers are now running 3.3.0.

                                  At this point I suggest you upgrade and see if it makes a difference - they have the upgrade procedure mostly foolproof.

                                  Frederick

                                  Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                                  1 Reply Last reply Reply Quote 0
                                  • honeycrisundefined
                                    honeycris
                                    last edited by

                                    I upgraded the firmware and I'm getting all the same results.

                                    M307 results:
                                    m307 h7 d60
                                    Error: M307: bad model parameters

                                    Tuning results:
                                    m303 h7 s50
                                    Auto tuning heater 7 using target temperature 50.0°C and PWM 1.00 - do not leave printer unattended
                                    Auto tune cancelled because temperature is not increasing

                                    😞

                                    1 Reply Last reply Reply Quote 0
                                    • Phaedruxundefined
                                      Phaedrux Moderator
                                      last edited by

                                      Try replaving your heaters block with this, which I generated from the config tool. For some reason you have it skipped to heater7 when the next heater should be 5.

                                      ; Heaters
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950              ; configure sensor 0 as thermistor on pin bedtemp
M950 H0 C"bedheat" T0                                       ; create bed heater output on bedheat and map it to sensor 0
M307 H0 B0 S1.00                                            ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                                     ; map heated bed to heater 0
M143 H0 S120                                                ; set temperature limit for heater 0 to 120C
M308 S1 P"e0temp" Y"thermistor" T100000 B4725 C7.06e-8      ; configure sensor 1 as thermistor on pin e0temp
M950 H1 C"e0heat" T1                                        ; create nozzle heater output on e0heat and map it to sensor 1
M307 H1 B0 S1.00                                            ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S280                                                ; set temperature limit for heater 1 to 280C
M308 S2 P"e1temp" Y"thermistor" T100000 B4725 C7.06e-8      ; configure sensor 2 as thermistor on pin e1temp
M950 H2 C"e1heat" T2                                        ; create nozzle heater output on e1heat and map it to sensor 2
M307 H2 B0 S1.00                                            ; disable bang-bang mode for heater  and set PWM limit
M143 H2 S280                                                ; set temperature limit for heater 2 to 280C
M308 S3 P"duex.e2temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 3 as thermistor on pin duex.e2temp
M950 H3 C"duex.e2heat" T3                                   ; create nozzle heater output on duex.e2heat and map it to sensor 3
M307 H3 B0 S1.00                                            ; disable bang-bang mode for heater  and set PWM limit
M143 H3 S280                                                ; set temperature limit for heater 3 to 280C
M308 S4 P"duex.e3temp" Y"thermistor" T100000 B4725 C7.06e-8 ; configure sensor 4 as thermistor on pin duex.e3temp
M950 H4 C"duex.e3heat" T4                                   ; create nozzle heater output on duex.e3heat and map it to sensor 4
M307 H4 B0 S1.00                                            ; disable bang-bang mode for heater  and set PWM limit
M143 H4 S280                                                ; set temperature limit for heater 4 to 280C
M308 S5 P"duex.e6temp" Y"thermistor" T100000 B3950          ; configure sensor 5 as thermistor on pin duex.e6temp
M950 H5 C"duex.e6heat" T5                                   ; create chamber heater output on duex.e6heat and map it to sensor 5
M307 H5 B0 S1.00                                            ; disable bang-bang mode for the chamber heater and set PWM limit
M141 H5                                                     ; map chamber to heater 5
M143 H5 S80                                                ; set temperature limit for heater 5 to 80C

                                      Z-Bot CoreXY Build | Thingiverse Profile

                                      honeycrisundefined 1 Reply Last reply Reply Quote 0
                                      • honeycrisundefined
                                        honeycris @Phaedrux
                                        last edited by

                                        @phaedrux
                                        This worked! I was able to tune correctly and the bad model parameters were probably that heater 7 shouldn't have existed.

                                        1 Reply Last reply Reply Quote 1
                                        • Phaedruxundefined
                                          Phaedrux Moderator
                                          last edited by

                                          Glad that solved it.

                                          Z-Bot CoreXY Build | Thingiverse Profile

                                          honeycrisundefined 1 Reply Last reply Reply Quote 0
                                          • honeycrisundefined
                                            honeycris
                                            last edited by

                                            This post is deleted!
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