Why Heater 1 appears to be over-powered???



  • Hi,

    When i do a temperature tunning, with M303 H1 S240.

    The result is this message...

    Warning: Heater 1 appears to be over-powered. If left on at full power, its temperature is predicted to reach 654C.
    Auto tune heater 1 completed in 219 sec
    Use M307 H1 to see the result, or M500 to save the result in config-override.g

    The results of code M307 H1...is:

    Heater 1 model: gain 629.9, time constant 149.2, dead time 6.2, max PWM 1.00, calibration voltage 24.2, mode PID, inverted no, frequency default
    Computed PID parameters for setpoint change: P6.9, I0.226, D29.6
    Computed PID parameters for load change: P6.9,

    Why?



  • @peirof The message means what it says - so if for example a Mosfet failed in such a way that the PWM wasn't working, the temperature could reach 654 deg C which could be dangerous and possibly constitute a fire hazard. You can either choose to ignore that warning or use a lower powered heater. Some people have reported this issue when fitting silicone socks to E3D hot ends. Whether they then choose to ignore the warning of use a lower powered heater, I cannot say.



  • The solution can be change Termopar?



  • @peirof said in Why Heater 1 appears to be over-powered???:

    The solution can be change Termopar?

    Not sure what you mean by Termopar - it hasn't translated well. But if the heater is being reported as over powered then the solution would be to use a lower powered heater - say 30 Watt instead of 40 Watt for example. Or simply ignore the warning but take appropriate safety steps like not leaving the printer unattended for long periods.


 

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