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Tricopter PI Settings kk2 - Pitch Problem

mumbimumbi Cologne, GERClub Members Posts: 24
Hi there,

i had my first real flight with my tricopter today and it was for the start pretty good.

The only problem ist that the tri is moving back if am in the air - (in the direction of the one rotor)



Dont know how to describe it better:



   l            l

   l            l



        l

        l



        ↓

It moves in this direction in the air.



I think i need to adjust the pi settings.

here are my settings i use at the moment:



Roll & Pitch :

P-Gain: 25

P-Limit:100



I-Gain: 15

I-Limit: 20

___



Rudder:

P-Gain: 80

P-Limit:20



I-Gain: 80

I-Limit: 10



Can anyone tell me how i need to adjust this values to get my tricopter more stable?

Thank you very much.



Comments

  • jstremmlerjstremmler Germany&U.S.A.Club Members Posts: 436
    First a question: Is it really balanced ? (Center of gravity in the middle of the tricoper)

    Second: Did you do the sensor calibration when the tricopter was absolutely level? (use a water bubble for that)

    After you have done that set the ACC-Trim Pitch value to negative !!! values until the copter does not move back anymore. (increase or decrease values in steps of 5, when starting...)

    jstremmler2016-05-22 00:03:38
  • mumbimumbi Cologne, GERClub Members Posts: 24
    the board is in the center of the tri. i calculated that, but the whole tri is not balanced... not really possible for my setup.

    Yes the copter was stable and leveled during acc calibration of the kk.

    Okay the acc trim sound perfect for me. Where can i find that on the kk?
  • WTWUKWTWUK CornwallClub Members Posts: 13,519 ✭✭✭
    Why is it not possible to balance your tricopter?

    If it is out of balance all you are doing is wasting motor power by making them work harder and turn imbalance into heat and getting shorter flight times.



    Why can you not place a minimum amount of weight at the 'high' point to level the thing?
  • jstremmlerjstremmler Germany&U.S.A.Club Members Posts: 436
    1. press menue

    2. press down until self-level calibration is highlighted

    3. press enter

    4. press down until ACC-Trim Pitch is highlighted

    5. press enter

    6. now change value to negative values

    7. fly and observe your copter

    8. go back to step 6 and adjust value again until your copter keeps the position

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