Patent ID: 8726440

Claim:
A washing machine comprising: a washing drum mounted in a vibration system; a drive that drives the washing drum at two different target rotational speeds below an application rotational speed for a predetermined time period, wherein the application rotational speed is a speed where laundry is forced against the drum wall by centrifugal forces; a sensor that measures a movement of the vibration system at each target rotational speed; and a programmable controller programmed to: drive the washing drum at two different target rotational speeds below the application rotational speed for one respective predetermined time period; measure a vibration system movement value due to a falling action of the laundry at each target rotational speed using the sensor; and compare the vibration system movement values with one another, ascertain a highest vibration system movement value, and ascertain an optimal target rotational speed which is associated with the highest vibration system movement value.