• Tags
  • Documentation
  • Order
  • Register
  • Login
Duet3D Logo Duet3D
  • Tags
  • Documentation
  • Order
  • Register
  • Login

M307 "bad model parameters" please help

Scheduled Pinned Locked Moved Solved
General Discussion
chamber heating heated enclosure
4
25
1.4k
Loading More Posts
  • Oldest to Newest
  • Newest to Oldest
  • Most Votes
Reply
  • Reply as topic
Log in to reply
This topic has been deleted. Only users with topic management privileges can see it.
  • undefined
    honeycris @fcwilt
    last edited by 5 Jul 2021, 23:08

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

    undefined 1 Reply Last reply 6 Jul 2021, 00:28 Reply Quote 0
    • undefined
      honeycris @fcwilt
      last edited by 5 Jul 2021, 23:18

      @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

      undefined 1 Reply Last reply 6 Jul 2021, 00:30 Reply Quote 0
      • undefined
        Phaedrux Moderator
        last edited by Phaedrux 7 May 2021, 23:23 5 Jul 2021, 23:22

        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        It probably won't help in this case, but your firmware is also out of date.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

        undefined 1 Reply Last reply 5 Jul 2021, 23:34 Reply Quote 0
        • undefined
          honeycris @Phaedrux
          last edited by 5 Jul 2021, 23:34

          @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
          • undefined
            fcwilt @honeycris
            last edited by 6 Jul 2021, 00:28

            @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
            • undefined
              fcwilt @honeycris
              last edited by 6 Jul 2021, 00:30

              @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
              • undefined
                honeycris
                last edited by 6 Jul 2021, 18:06

                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
                • undefined
                  Phaedrux Moderator
                  last edited by 6 Jul 2021, 18:20

                  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

                  undefined 1 Reply Last reply 7 Jul 2021, 12:03 Reply Quote 0
                  • undefined
                    honeycris @Phaedrux
                    last edited by 7 Jul 2021, 12:03

                    @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
                    • undefined
                      Phaedrux Moderator
                      last edited by 7 Jul 2021, 16:32

                      Glad that solved it.

                      Z-Bot CoreXY Build | Thingiverse Profile

                      undefined 1 Reply Last reply 7 Jul 2021, 18:01 Reply Quote 0
                      • undefined
                        honeycris
                        last edited by 7 Jul 2021, 18:00

                        This post is deleted!
                        1 Reply Last reply Reply Quote 0
                        • undefined
                          honeycris @Phaedrux
                          last edited by 7 Jul 2021, 18:01

                          @phaedrux

                          I spoke too soon. I tuned the heater with the thermistor pretty close to the heater because otherwise I kept getting the "auto tune cancelled because temperature is not increasing" error. So I moved the thermistor and was able to get it to tune, but then I moved the thermistor to above the print bed. After moving it when I tried to run the heater it would never get up to temp. So then I tried to re-tune with the better thermistor position and I got the auto tune error again and again.

                          I ultimately want the thermistor to be above the print bed for reasons but I cant get the heater tuned in that position.

                          undefined 1 Reply Last reply 7 Jul 2021, 18:17 Reply Quote 0
                          • undefined
                            Phaedrux Moderator @honeycris
                            last edited by 7 Jul 2021, 18:17

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

                            I ultimately want the thermistor to be above the print bed for reasons but I cant get the heater tuned in that position.

                            Chamber heaters are usually pretty slow to heat the entire volume, so placing the thermistor far away from the heat source makes for a very loosely coupled heater control system. It's probably a better idea to have the thermistor closer to the heater so that it can actually be controlled. You'll just have to have a delay to wait a while for the temp in the chamber to rise and equalize.

                            Z-Bot CoreXY Build | Thingiverse Profile

                            undefined 1 Reply Last reply 7 Jul 2021, 19:47 Reply Quote 0
                            • undefined
                              honeycris @Phaedrux
                              last edited by 7 Jul 2021, 19:47

                              @phaedrux

                              Okay that makes a lot of sense. Thanks.

                              undefined 1 Reply Last reply 7 Jul 2021, 20:02 Reply Quote 0
                              • undefined
                                dc42 administrators @honeycris
                                last edited by 7 Jul 2021, 20:02

                                @honeycris alternatively, use a small fan (one that can stand the temperature in the chamber) to circulate air, so that the heat reaches the thermistor more quickly. This should also make it viable to use PID control.

                                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 0
                                • undefined
                                  Phaedrux Moderator
                                  last edited by 7 Jul 2021, 20:03

                                  can you give us some more details about the heater, chamber, and printer itself? Maybe with some more context we can give a better recommendation.

                                  Z-Bot CoreXY Build | Thingiverse Profile

                                  1 Reply Last reply Reply Quote 0
                                  19 out of 25
                                  • First post
                                    19/25
                                    Last post
                                  Unless otherwise noted, all forum content is licensed under CC-BY-SA