APM Controlled Gimbal is Jumpy

Posted by 29sbpxgo3ojqq on July 30, 2014 at 4:26am

I am working on stabilizing my mapping camera using the built-in gimbal function and it is very jumpy/stepping in the roll axis.  I do not notice it in the pitch axis. I have tried three high-quality, high-speed digital servos and one analog servo with the same results. I am about to go to a separate control board, since I believe it is the APM at this point.

Any ideas?

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Replies

  • Keith Geary July 30, 2014 at 7:40am

    I have the PixHawk set up to only supply the servos with voltage, once they are armed. This also includes the camera trigger, sometimes I take a test shot and wonder why nothing happens, then remember that the arming switch has not been pressed. The gimbal does move a little even when not armed, but to test everything, you should arm the aircraft, if indoors, remove the prop or make sure its clear and the RC Tx is at hand with the throtle fully down and all the switches on the Tx are up, so it does not decide to RTL or something crazy.

  • Keith Geary July 30, 2014 at 7:29am

    If you do add a BEC, I should have stated you must disconnect the ESC + wire from the ESC servo plug!

  • Keith Geary July 30, 2014 at 7:05am

    Have you armed the aircraft? How are you powering the servo rail and APM?

    You might find adding a BEC to power the servo rail helps, but make sure it is not supplying more than 6.8v or whatever your servos / APM are rated for.

    I am using a PixHawk to control a FlatMap1 2D gimbal, powering the servo rail with a 6v 5A BEC, the actual voltage on the rail is around 6.1v, it seems to work fine.

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