Fix oscillations and wobble in Betaflight
Not every wobble is the same: the frequency reveals the cause. Slow waggle, fast buzz and oscillation only at mid throttle each have a different source — and a different fix.
Slow waggle (1–2 Hz): usually too much I
A slow, sluggish back-and-forth over roughly a second almost always points to too much I. Lower I in small steps until the slow oscillation disappears without the axis drifting.
Fast buzz: too much P, too much D or noise
Fast, high-frequency buzz comes from too much P (overshooting correction), too much D (which amplifies noise) or from unfiltered motor noise. Reduce P to just below oscillation; if D is the culprit, more D-term filtering or slightly less D helps.
Oscillation only at mid throttle
If the wobble appears only in a certain throttle band, motor harmonics slipping between the filter notches are usually to blame. Check that the RPM filter and dynamic-notch range cover the mid band — a mechanical cause (prop, bearing, screw) is often involved too.
Read the frequency from the log
Instead of guessing which of the three it is, PIDoctor reads the frequency and axis straight from the log and classifies your wobble — slow vs. fast vs. throttle-dependent — and suggests the matching fix.