Arduplane limited servo movement

Hi - Not sure if thats a good title but here goes - I have built a plane with pixhawk and arduplane installed - all is working fine but I have one simple problem - When I move the elevator and rudder in stabilized mode using the sticks on the tx the surfaces move to their normal extents but if I run stabilize mode and move the plane around the elevators and rudder barely move to their limts (they move about 40% od the total movement possible) - they move some movement but not all the way meaning the plane turns or pitches too slow to correct and stabilize


- the plane is working and trimmed in manual no issues and stabilize works to some extent but why are the control surfaces not moving to their limits when trying to stabilize the plane?




Mark B


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  • that was a lot less painful than I thought it was - just to complete the thread - I adjusted the p gains up to 1.0 and the surfaces did indeed move alot more - thanks for the help  

  • I'm wondering the same thing and in FBWA mode I don't get anything like the movement I see in manual mode.

    In RTL I can roll it 90 degrees and the ailerons only move a little...

    • same problem as me

    • Your P gains are too low. Pick a large value then see what happens when testing on the ground.
    • cool ok - will do as well

    • Thanks! will do

  • Hi Mark,

    I don't have a Pix but flying a few planes with apm 2.5 installed. as I understand it is normal that the servos not running to their limits in stabilize mode and normal not need too. fly the plane and check it out.

    And Mark, be ready to switch back to normal mode if anything goes wrong, don't try this in 15m altitude, :) 



    • well yes I can just go for it I guess - was just trying to sort out the issue first ;)

    • What plane is it?

    • its an easy star 2

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