Auto tune cancelled because target temperature was not reached



  • Hi,
    I am working on my extruder which take quite some time to heat!!
    how can I avoid this error and make the controller waits more to reach the temperature?

    Also how can I change the heating rate so I can avoid the heater fault error?
    Thanks



  • Is it expected that your heater will take a long time to heat up? I mean, is it a custom-made one? If it is a 'standard' version, it should work within range. In both cases, it would be good to know:

    • The M303 autotune command you are sending
    • Your config.g (and config-override.g if used) settings for the heater and thermistor(s)
    • The resistance of the heater cartridge
    • The voltage you are using
    • Also check that you have put the hot end together correctly, ie that any cooling fan block is not touching the heater block

    All these will effect the rate at which the heater will heat up the hot end, and it's difficult to advise you without knowing them. Other threads on the same subject, which might help: https://forum.duet3d.com/search/?term=auto tune cancelled&in=titlesposts

    Ian



  • @droftarts said in Auto tune cancelled because target temperature was not reached:

    ll th

    Thanks for your reply.

    regarding your questions:

    1. I used the M303 H2 S180 command

    2. these are the configurations for the heater:
      --in config:
      M305 P2 T100000 B4725 C7.060000e-8 R4700 ; Set thermistor + ADC parameters for heater 2
      M143 H2 S250 ; Set temperature limit for heater 1 to 280C
      --in config_override:
      M307 H2 A276.0 C368.1 D5.5 S1.00 V11.8 B0

    3. the resistance is 4.8 Ohm

    4. the voltage is 12V

    5. I am trying to make a heated piston extruder with stainless steal
      the system needs time to be heated and I could reach the required temperature when I reset the printer and turn the heater on several times!!!


  • administrators

    Try configuring that heater as a bed or chamber heater, then tune it. When tuning has succeeded and you have saved the resulting M307 H2 parameters, you can change it back to a tool heater.

    Upgrading the heater cartridge to 50W or turning up the supply voltage a little may also help.



  • @dc42 said in Auto tune cancelled because target temperature was not reached:

    M307 H2

    Thanks the problem was solved by making the heater a chamber heater and then tune it


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