A paper web is passed from the press section to the drying section in a paper machine. A nsPEF generator may be used with an electrode assembly to apply the pulses to one or more tumors where the parameters for the nsPEF are optimized for treating such tumors. The linkage system is pivotably connected to a main bearing of the vehicle body and is pivotably connected to the cover. During \u201cDrop\u201d, reverse voltage is applied briefly to demagnetize the lifting magnet. The invention enables production of a powder product having a desired average particle size at high efficiency.