A drive apparatus is provided, which is connected via a serial bus to a personal computer. The barrels are filled with gas pressure. The ore to be concentrated is fed to a feeding system including a bin in batch form and carried from the bin by a screw through a screen to the table. The entire procedure can be performed in a little over ten minutes, which represents an enormous time savings over existing methods. An access gate line is elevationally outward of the pair of electrically coupled datasense lines and is operatively adjacent the channel region.