Duet & Duex5 in E3D ToolChanger - Every Other Fan Header Dead



  • I recently got hold of E3D's toolchanger platform, on first power up I noticed I couldn't get all but one of the hotend fans to spin.

    The way the machine is structured is it allocates 2 fan pins per tool, one for the heatbreak cooling and one for the part cooling fan. If I swap the connectors for the part cooling fans with the heatbreak fans all the heatbreak fans come on. It also turns out the one that was spinning was wired wrong, I had the PCF and HE fan's switched, though, interestingly that part cooling fan is fully dead, as in I can't get it to spin even on a bench supply, it takes no current.

    So, I broke out a multimeter and measured the output from the duet.

    M107 (P0 to P8)

    Pin Voltages -
    Duet
    P0 0.6-0.8v
    P1 0.6-0.8v
    P2 0v
    Duex
    P3 0.6-0.8v
    P4 0v
    P5 0.6-0.8v
    P6 0v
    P7 0.6-0.8v
    P8 0v

    M106 (P0 to P8) S255

    Pin Voltages -
    Duet
    P0 0.6-0.8v
    P1 0.6-0.8v
    P2 24v
    Duex
    P3 0.6-0.8v
    P4 24v
    P5 0.6-0.8v
    P6 24v
    P7 0.6-0.8v
    P8 24v

    What's likely happened here?


  • administrators

    The heatsink fans are configured to turn on thermostatically. So they won't turn on unless the heatsinks are hot enough. For testing purposes, include H-1 in the M106 S255 command to disable thermostatic mode.



  • Oh..
    okay, yes - that's all this was.

    I don't know why you're answering idiot questions at 10pm, but I'm glad you are.

    Thanks!


  • administrators

    No problem!


Log in to reply