Vibration
Traditional vibrating rollers are equipped with a circular vibrator in the drum. It effects by fast rotation that the drum begins to vibrate, thereby compaction forces arrive into the soil. With the directed vibrator two moving masses, arranged in opposite directions, are used which cause directed oscillations.
Oscillation
In the oscillation drum masses turning in the same direction, produce one moment around the drum axle. The moment changes its effect direction during a turn of the mass (forward and backward), so that the oscillation drum movement is created. Here thrusts are introduced into the soil.