The measured cone force Fc shown in Fig. 7 is more regular, while the force in Fig. 5 includes more perturbations besides the oscillation movement. The strong periodical character of the force signal is also visible in the Fast Fourier Transformation of the measured force shown in Fig. 7 which has the main frequency at 2 Hz. As before, this is the frequency of the oscillation axis. But in contrast to the former transform of the signal measured with the open-loop-controller, there is just one main frequency in the signal. This one is the frequency of the oscillation, which is directly mechanically coupled to the system. Between zero Hz and 5 Hz, there are disturbance frequencies in the spectrum, as before for feed controlled honing. But, in comparison they are less noisy and also from smaller magnitude.