Discussions

Pixhawk+APM power module+Attopilot Wiring ??

Posted by Ronny Grimm on March 5, 2014 at 10:10am

Hi!

I just ordered a Pixhawk to put on my s800 hexacopter.

As I need 12v for video TX and gimbal controller card i have a 3s lipo onboard, the ESC/motors run on 6s.

I just want to make shure my thinking is right.

I want to power the pixhawk from the std. APM Power module from the 3s and monitor the U and I on the 6s Battery (because it is the one that will become empty first...)

Is my drawing correct???

Is this a safe way to power the Pixhawk or...Should i power it some other way ? 

3691102554?profile=original

Best regards Ronny Grimm

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Replies

  • Ronny Grimm March 13, 2014 at 11:13am

    Hi

    I will answer ny own question after having tested this out...

    This works just fine!!

    I also power the output rail from a 5V bec for redundancy.

    • Developer
      Bill Bonney > Ronny Grimm March 13, 2014 at 11:23am
      I think you would be better off connecting the ground via the the PM. The wires on the DF13 connector are rated at 500mA. They are paired to give 1A. By re-routing the gnd to the attopilot sensor, you bring the cable capacity closer to the operating current. By taking a fly lead from GND from the PM to the attopilot, you will restore the 1A capacity.

      It may work ok, but i'm trying to highlight the impact of your changes.

      Hope that helps:)
      • Ronny Grimm > Bill Bonney March 13, 2014 at 11:25am

        Ok thanks!

        • Ronny Grimm > Ronny Grimm March 13, 2014 at 11:42am

          Ok like this then..  :D

          3702750744?profile=original

          • This reply was deleted.
            • Ronny Grimm April 28, 2014 at 3:31am

              Yes it flies like a dream with the pixhawk. Flies well on default settings but I tuned a little higher  Stabilize P (5,5000) instead of default 4,500 on roll and pitch. 

              "Flips backwards..." must be some serious fault on your setup.!!

              Double check that you have connected the motors as this on your S800 

              Due to different motor numbering on DJI and APM you have to connect the motors as below...

              APM/PIXHAWK OUTPUT # 5 to f800 # 1
              APM/PIXHAWK OUTPUT # 3 to f800 # 2
              APM/PIXHAWK OUTPUT # 2 to f800 # 3
              APM/PIXHAWK OUTPUT # 6 to f800 # 4
              APM/PIXHAWK OUTPUT # 4 to f800 # 5
              APM/PIXHAWK OUTPUT # 1 to f800 # 6

              This is with default Pixhawk settings...

              https://www.youtube.com/watch?v=aMwMEcYTmYA

              • This reply was deleted.
                • Ronny Grimm April 28, 2014 at 9:06am

                  Yes "X" And one more thing...

                  Check your radio so pitch channel is not reversed...

This reply was deleted.

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