A method and plant for conversion into oil is provided which can completely heat and decompose a large amount of a plastic raw material, and treat a harmful gas. The platform is powered by a centrally located iso-linear drive system incorporating elastomeric bushings that support the cover of the platform and impart the oscillatory motion from the motor to said cover. The method also includes the steps of providing the PCA data as input to a neural network; and utilizing the neural network to process the PCA data to provide data representative of a corresponding modified head shape. In such a manner, while suppressing the peak of consumption current, the fall time of the boosted voltage can be shortened.