How to check if motors are connected right?

I just installed the firmware, did the accelerometer and radio calibrations, and got everything plugged in on a spider frame quad. The motors will all spin up and I can tell the board is making adjustments by the sound of the motors as I run it up while holding it. But the control response is all screwed up. My right stick inputs (mode 2 radio) don't make the quad go in those directions. It looks like roll gives me a pitch response, pitch doesn't do much at all, and yaw gives me yaw and a bit of roll. I am pretty sure I plugged the motors in to the right outputs based on the diagram on the setup page, but motors in the wrong outputs would definitely cause this problem. So is there a way to test each motor individually through mission planner so that I can verify that the flight controller is hooked up right?

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  • Obviously you can check the direction of rotation of each motor...  that's the first thing to confirm, otherwise you'll experience the 'flip of death' as you try to take off

    Then simply check the motor number against the diagrams and the APM output:

    http://copter.ardupilot.com/wiki/connecting-the-escs-and-motors/

     

    You will normally find that the Elevator (right stick forwards/backwards) will be inverted..  it's a historical feature lol!

     Also look at the Motor Test function under Initial Setup/Optional Hardware.

    When you are happy all is correct, you can spin the quad motors on the ground at very low speeds (outside!) and gently try the controls - you can then notice if the quad moves as expected...

    Don't use enough power to get airborne, just sufficient to notice that the quad tries to go in the commanded direction..

     

    Hope this helps!

    • Thanks. I already have the rotation direction right, and now I'm at the point of testing my control response. That's where I got stuck.I was wondering if there is a way in mission planner that I could order a single motor to turn so that I can verify that I have them plugged into the outputs correctly?

      • No problem..

        As I said above..   Also look at the Motor Test function under Initial Setup/Optional Hardware (Mission Planner) you can spin each motor independently. (From what I remember, they only turn clockwise though..)

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