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31 Aug 2019 20:37:03
Looking forward to BFU #9 footage  :D Hope you all had a great time
31 Aug 2019 04:46:44
Hope you all have a great day today at the BFU 9  :beer2:
29 Aug 2019 11:19:07
try again now, hopefully it should be resolved...
29 Aug 2019 11:17:40
Should be fixed now
29 Aug 2019 11:12:33
replies with only a few words are being rejected as file too big.. :hmm:
29 Aug 2019 11:09:33
3D Site also affected
29 Aug 2019 11:09:11
Gaza is on the case
29 Aug 2019 11:09:03
there are currently issues with the forum
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28 Aug 2019 17:28:19
Cheers Andy7.
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MultiWii yaw

Started by barneyg, Tuesday,June 25, 2013, 13:04:47

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This one is different ... Its not about yaw speed :)

I';m noticing 2 behaviors and I';m wanting to try and tune them out if possible.

The first is random yaw movement.  Using angle mode if I sit hovering in place I find that the quad will randomly yaw usually to the right but not always.  Introducing left trim on the yaw axis on my TX doesn';t work as this movement isn';t a constant rotation.

2nd up is when I manually Yaw the quad (again in angle mode) I find that when I stop it swings back the way it came a little bit.

I';ve tried randomly upping all three of the Yaw pid values with no noticeable effects.  Does anyone have any advice ?


Has your board got the compass on to, if so is it calibrated accurately or could you be getting interference from your power cables or other source   :beer2:


It does have a compass but is that it shouldn';t be having any effect in Angle mode :



One thing i noticed on my ventures is that i have seen motor layout and prop directions change depending on whos sketch. For instance.... Multiwii has diff motor layout and prop direction from Megapirates. I wonder how many other configurations are out there :/   i would guess if your copter turns one way better then the other and since mechanicly the same all around other then yaw i would beconcerned of maybe a motor turning wrong way. Not prop, just motor. If not balance you would have a centrifical force wanting to turn one way faster then the other if motor torque are not directionally balanced.  As if motor layout (directions) dont match your gyro sketch.  I am a noob at this but sounds lagit! Lol


well getting better ... I';ve been playing with PID';s ... increasing P seems to help.


If the prop or prop adapter on one of your motors was slipping you might get random yaw movements in one direct and not another.
One circlip short of a quadcopter.
 1 lobe short of an antenna.


interesting that may be why i was seeing a little random yaw coming out of invented descents, thx.
Point and click.

Monkey see, Monkey do.


Saturday,June 29, 2013, 21:32:08 #7 Last Edit: Saturday,June 29, 2013, 21:35:31 by barneyg
As far as I can tell the props are not slipping ... the increased P seems to have reduced the pendulum effect too.

Though it was pretty windy today so I';m not sure the affect that had.


You might also want to check that your props are level. My hex had a right yaw movement and in the end I found out one of the props was slightly off center. Good luck.
Always smile because you never know who could be falling in love with it. :) Drone Operator in North Wales. www.aerialworx.co.uk