What is wrong with FAN1 output?



  • I'm using M106 P0, P1 or P2 for fan output connections FAN0, 1 and 2 followed by a S255 for full on or S0 for full off. My FAN1 has no output using the command. When I reset the Duet, or cycle power FAN1 does cycle on then off. I contacted Filastruder, they contacted Think3dPrint3D, and a warranty replacement was sent. Now this new board exhibits the same behavior. I'm running FW v1.17 (2016-12-24). This is the first time trying to use this output so I have no experience with it working correctly. Can someone verify it's not a FW problem? Please advise if any other testing should be performed on my end. Thanks.



  • Just so everyone is on the same playing field are you considering FAN1 the cooling fan for extruder 0 ?

    For me the following applies

    M106 P0 S255 turns on the part cooling fan to full
    M106 P0 S0 turns off the part cooling fan, you can of course go in between.

    M106 P1 S255 does nothing as it's only turned on via thermostatic control when the hot end goes above 45C.
    M106 P2 S255 does nothing as it's only turned on via thermostatic control when the hot end goes above 45C.

    Hope this helps.

    Jeff



  • Jeff,

    It looks iike I posted this before carefully reading the documentation: "FAN1 is set up as a thermostatically-controlled fan by default. To use it as a normal controlled fan, you must first cancel thermostatic mode by sending M106 P1 H-1."

    Thanks for the feedback,
    Bob


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