Discussions

Different weight - climb/fall down, PID tuning or what?

Posted by Nayden on September 11, 2014 at 1:52am

Hi all,

I have ~6 kg Octo.

Main problem:

- When i have only the frame:

when I'm moving the RC stick in middle, the copter starts to climb.
If I set in Alt Hold mode it's the same.

- When I'm set + 3 kg (gimbal + camera):
when I'm moving the RC stick in middle, the copter begins to fall down.

Experience: On Dji naza controller, not depends from weight, here maybe I have to set for different weight or something?

What am I missing could you help?

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althold, loiter, pixhawk, climbing, pid, throttle, weight

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Replies

Gerard Toonstra September 11, 2014 at 4:07am

I think the APM uses a "throttle_mid" setting that can influence how it deals with altitude:

http://copter.ardupilot.com/wiki/ac_throttlemid/

As stated there, if you have to apply a lot of throttle, it may be underpowered and you don't have a lot of reserve for manoeuvers and adjustments in attitude.
- Nayden > Gerard Toonstra September 11, 2014 at 4:16am
  
  Thank you Gerard :)

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