Thermostatic fan control



  • I am wanting to control an enclosure fan so that it comes on when the E1 thermistor reaches 26c. I have it set up on PWM FAN1.

    M107 P1 S1 I0 F500 H1:2 T26

    But instead it turns on when the hotend starts to heat up. What am I doing wrong in the code above?



  • Please, try this:

    M106 P1 L255 S255 F500 H2 T26


  • administrators

    @cdl1701@yahoo.com:

    I am wanting to control an enclosure fan so that it comes on when the E1 thermistor reaches 26c. I have it set up on PWM FAN1.

    M107 P1 S1 I0 F500 H1:2 T26

    But instead it turns on when the hotend starts to heat up. What am I doing wrong in the code above?

    H1:2 means turn the fan on when either thermistor 1 or thermistor 2 is at or above 26C. You need just H2 as in the previous reply.



  • Ahh I misunderstood what the H1 was then. I thought H1 enables thermostatic mode and H-1 disables. But it means turn it on or off for that particular thermistor. So H0, H1, and H2 are available for thermostatic mode?



  • @cdl1701@yahoo.com:

    Ahh I misunderstood what the H1 was then. I thought H1 enables thermostatic mode and H-1 disables. But it means turn it on or off for that particular thermistor. So H0, H1, and H2 are available for thermostatic mode?

    Correct.

    H-1 = Disable
    H0 = Heater 0
    H1 = Heater 1
    H2 = Heater 2



  • So the fan still will not turn on when the inside of the box reaches temp. Should all three thermistors be showing up in the heaters section?


  • administrators

    The third thermistor reading will not show up unless you configure it to be used as another extruder heater, or as a chamber heater. So I suggest you configure heater 2 as a chamber heater (even though it isn't really) using M141. You will also need the usual M305 commands to set thermistor parameters for heater 2.



  • Ahh that did the trick. Thanks!


Locked
 

Looks like your connection to Duet3D was lost, please wait while we try to reconnect.