The aim of the invention is to enable the exact determination of the rotational speed and rotational speed ratios for and between the individual disks, even for the maximum rotational speeds and working speeds.

Between the steady-state and the increased speed ratios smaller than steady-state speed ratios are set.

Their rotary speeds are the same.

In this way, a fixed structure of an eccentric rod and a vibration generator are obtained which reduce noise generated by vibration when run at high as well as at low rotation speeds.

The rotational speeds are adjustable in real time.

Comparatively high speeds can thus be achieved.

The bowls opposite have identical rotational velocities.

An electrical generator for use at low rotational speeds.

Preferably, the rotational speed value used is a mean value of the two rotational speeds (203, 205).

The blower is configured to operate at variable rotational speeds.

The calculated speeds are stored and can be displayed.

The invention enables a more precise determination of differences in the speeds of rotation.

A speed of rotation sensor is a micromechanical silicon component.

This makes a noise reduction possible at low rotational speeds.

The invention is useful for measuring absolute angular positions, the rotating speeds of rotating machines.