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Heavy wobble on descend & gain height on roll

Posted by jjohow on December 10, 2011 at 2:33pm

Hi there,

I'm a real newbie, managed to get my stock 3DRobotics quadcopter APM finished yesterday and did some tests today.

Two questions for now:

the copter was flying quit well except for a wobbling that occurs on (even not so very fast) descends. When I pushed it down a bit faster, it wobbled like hell and almost crashed.

I read in the toubleshooting that a solution for a wobbling copter on descend is to raise gains on RATE_ROLL_P and RATE_PITCH_P.

But by who much? That for me is a general question on PID settings. Is it more like: from 0,130 to 0,180 (or something) or is it like from 0,130 to 2,5?

- and - whenever I roll the copter it gets a clear gain in height. Is that normal?

Thanks guys...

Joerg

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Replies

  • Developer
    Jason Short December 10, 2011 at 2:59pm

    you should try increments of .01

    Or better yet, use Ch6 input to control the value with a proportional control on your radio. Flaps control knob for example.

    Jason

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