FFT LOG- not what I expected

ArduCopter Copter 4.2
1

Hi Everyone- I received a nice set of props from MejZlik so after replacing the tri props I tried to update the notch filter, but when looking at the fft logging it does not look as expected…(attached are 2 logs) 2 Items
and a screen pic of the output below - Thanks in advance!

fft
fft993×457 9.76 KB

2

You didn’t enable batch logging. Set these:
INS_LOG_BAT_MASK,1
INS_LOG_BAT_OPT,4

You have some motor oscillation that should be addressed before tuning the notch filter. Looks like D-term oscillation to me but you can also reduce these based on the MOT_THST_HOVER value:
PSC_ACCZ_I,0.71
PSC_ACCZ_P,0.3737
and set this:
INS_ACCEL_FILTER,10

3

Thanks Dave…i suspect the lighter configuration im using isnt helping the oscillation