Temp controlled Fan setup for non-heater application

  • I am trying to setup a Chassis fan to suck out air from enclosure once the ambient enclosure temp exceeds say 65degC

    I have this setup as i am using PT100 sensors

    M305 P0 T100000 B4138 R4700 ; Set thermistor + ADC parameters for heater 0
    M143 H0 S160 ; Set temperature limit for heater 0 to 160C
    M305 P1 X201 ; Configure PT100 for heater 1
    M143 H1 S430 ; Set temperature limit for heater 1 to 430C
    M305 P2 X200 ; Configure PT100 for heater 2
    M143 H2 S430 ; Set temperature limit for heater 2 to 430C
    M305 P3 T100000 B4138 R4700

    Fan control something like this

    M106 P2 S0 T65 H3

    as using P2 Fan output.

    I wish to use a normal thermister on say E0 thermistor input as its not used due to PT100 Board

    I was playing with the M305 command to setup parameters for thermistor

    Is there a simple way for the M106 commane to read the thermistor channel, do i need to create a tool?
    What have i missed?

    some help would be greatly appreciated.

  • Any Help here. i can seem to read the onboard thermistors after i have the PT100 allocated to the Hot ends.

    For the time being i have my chamber fan turning on after the Bed gets to 130 Deg C.

  • administrators

    Use M305 to set up a virtual heater that uses that thermistor (e.g. heater 102), then use M106 to control the fan thermostatically from that heater number.


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