Arduplane limited servo movement

Posted by Mark on April 23, 2014 at 4:09am

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?

 

cheers

 

Mark B

 

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Replies

  • Mark April 25, 2014 at 3:36am

    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  

  • OutbackUAV.com April 23, 2014 at 5:21pm

    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...

    • Mark > OutbackUAV.com April 24, 2014 at 12:02am

      same problem as me

    • iskess > OutbackUAV.com April 23, 2014 at 5:40pm
      Your P gains are too low. Pick a large value then see what happens when testing on the ground.
    • Mark > iskess April 24, 2014 at 12:01am

      cool ok - will do as well

    • OutbackUAV.com > iskess April 23, 2014 at 5:59pm

      Thanks! will do

  • Dieter Gross April 23, 2014 at 5:34am

    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, :) 

    cheers

    Dieter

    • Mark > Dieter Gross April 23, 2014 at 6:45am

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

    • Dieter Gross > Mark April 23, 2014 at 4:37pm

      What plane is it?

    • Mark > Dieter Gross April 24, 2014 at 12:01am

      its an easy star 2

This reply was deleted.