[Mallowsthecat]

Hello i would like to ask if you have any input on my experience below:

when i fly my quad and i go high altitude then descend my quad (medium to high oscillation) oscillates while decreasing altitude.

when i fly my quad on windy conditions i experience mild to medium oscillation

thanks in advanced for your inputs and suggestions

here is my setup:
2200mah zippy 20c 3s
DYS 250 frame
20amp esc x4
5x3x3 props x4
cc3d
fs-i6 rx
dys brushless motors x4 2300kv
 

[TheOtherCliff]

I assume it is not actually a rhythmic oscillation; that it is flops around randomly, with random timing.

This is normal but can be minimized by tuning (increasing) the PIDs.  Hand tuning the PIDs is a long discussion.  I suggest you Google about it.    If it is actually a rhythmic oscillation, then at least part of the PID is too high.

Also, for the flopping around issue while descending, there is a feature that increases the PIDs when you decrease the throttle that is made for this.
Configuration -> Stabilization -> Bank# -> Advanced -> EnableTPS

If you are uncertain about whether it is an oscillation or random flopping around, you might post a video here for us to see. 

[Mallowsthecat]

Hello Cliff thanks for the advice! yes you are right it is a random flops


also thanks for this cliff i will try this later!

Configuration -> Stabilization -> Bank# -> Advanced -> EnableTPS