razr

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Overly sensitive yaw servo on tricopter
« on: January 31, 2016, 06:49:32 pm »
Hello

So after been building and flying with a quadcopter quite a bit last year I went and built a tricopter running with a CC3D

After completing it, it flew, but the yaw which is overly sensitive which causes the tricopter to wobble ridiculously.

So how do I tune it so the wobbles stops?

Thanks in advance!

f5soh

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Re: Overly sensitive yaw servo on tricopter
« Reply #1 on: January 31, 2016, 06:56:39 pm »
Is really Yaw or Roll ?

Take a look at this post:
https://forum.librepilot.org/index.php?topic=686.0


razr

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Re: Overly sensitive yaw servo on tricopter
« Reply #2 on: January 31, 2016, 09:54:52 pm »
It's the yaw servo.
For instance, when I arm the copter and then lift it up with my hand, the yaw rotor starts "shaking" if you know what I mean.
I tried to reduce the yaw mixer, it did sort of help but it also made the steering sluggish too

f5soh

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Re: Overly sensitive yaw servo on tricopter
« Reply #3 on: January 31, 2016, 10:45:25 pm »
Try adjusting the PID values for Yaw axis.

This appears only when on ground (soft landing gear) or while flying ?


razr

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Re: Overly sensitive yaw servo on tricopter
« Reply #4 on: February 01, 2016, 08:24:39 am »
It's happening whenever the copter is moving, whether by flying or while handled.
Which of the PID values should I change? There are quite a lot of different yaw values to choose from

f5soh

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Re: Overly sensitive yaw servo on tricopter
« Reply #5 on: February 01, 2016, 10:26:16 am »
Stabilization tab > Advanced > Rate (inner loop) > PID Yaw

Search for some youtube video if you know nothing about PID




razr

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Re: Overly sensitive yaw servo on tricopter
« Reply #6 on: February 01, 2016, 08:01:05 pm »
Thanks mate

I'll get going on learning PID and get it flying