RC Servo control from Duet 2 Expansion header.

  • Good afternoon,

    I'm having some difficulty controlling a RC Servo from my Duet 2 expansion header.

    Duet 2
    Firmware 2.05.1

    In my config I disable heater pin for with the M307 H4 A-1 C-1 D-1 command.

    The servo I'm using is a Hitec HS-322HD. I'm using an external power supply for the servo and I've connected the signal to pin 13 on the expansion header labelled 'Heater 4'.

    When I send a M280 P4 I1 S90 command the servo only makes a small movement in a clockwise direction. I can keep sending the command and the servo will only make a small movement every time, it also has no holding power once the move is done the servo can be turned by hand without resistance.

    Any help would be appreciated.



  • @JustinCase

    do you have a config overwrite?

    that might reenable the heater.

  • @Veti I've checked and I don't. I type M307 H4 into my Console and it returns 'Heater 4 is disabled'

  • Turns out when I use Heater Pin 6 and Pin 7 it works. Not sure why Heater Pin 4 was not co-operating.


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