• This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn more.

Tricopter Yaw Servo issues

rshaan

Junior Member
#1
Hey Guys! My yaw servo on my tricopter won't center itself properly when I let go of my rudder stick! It's properly trimmed and re-centers fine when my KK2 is disarmed, but otherwise just does not want to recenter! I took this video to be more descriptive..


What can I do to fix this? Is it a defective servo, maybe?

Thanks for your help!
 

Trinom

Crazy electrician
#2
I don't think your servo is defective. It is connected to the KK board, isn't it? I have rabbit and it does the same on the ground, but once it's in the air, it works fine. I guess it's because the control board is expecting movements, but it doesn't sense anything.
 

jsj7206

Junior Member
#3
I know this is an old thread but I'm having the same problem with my tricopter on the bench. Did you ever figure yours out/did it fly right? I'm running an analog HS82mg on a KK2 1.6 board. Thanks in advance!
 

xuzme720

Dedicated foam bender
Mentor
#4
If it's only doing it when armed then it's like Trinom said. Basically it's normal since it isn't sensing any movement to counteract, just like the tail rotor pitch on a CP heli. Acts like its stuck(doesn't center) while on the ground and will only move with rudder stick inputs until it's in the air.
 

Cyberdactyl

Misfit Multirotor Monkey
#5
Make that a third on the same as xuzme and trinom said. I was perplexed and worried too when I tried it out on the bench. Once in the air it's much better.
 

Johan

Senior Member
#6
Just tested mine and when stationary (no props, on desk) it behaves the same (no full re-centre).

I noticed something else along the way by the way: Rudder input turns the yaw servo in the right direction, but (with auto - level on on the KK2 and turned by hand, the yaw servo seems to twist the wrong way?? Have to figure that one out...)

Any pointers appreciated
 
Last edited:

xuzme720

Dedicated foam bender
Mentor
#7
mixing editor should take care of that. just reverse the number for the servo...for example: if it's 100, make it -100. I don't know what you values are just make sure you are changing the rudder servo and not the speed control.
 

Johan

Senior Member
#8
mixing editor should take care of that. just reverse the number for the servo...for example: if it's 100, make it -100. I don't know what you values are just make sure you are changing the rudder servo and not the speed control.
@xuzme720, Thanks for the quick reply,

Sorry, I just checked and I was not thinking straight, It actually corrects in the right direction.

With the yaw mechanism it is confusing a times, you have to imagine in what direction it pulls the tail, pointing the head in the opposite direction.

I just had things a bit mixed up....
 
Last edited: