Controlling a buffered data transfer between a source and a destination by loading a source count value and a destination count value from a buffered data transfer device. Manipulated fibrous materials may be either composed of natural polymers such as cellulose, hemicellulose, silk, et cetera, or synthetic polymers, or mixed materials. By selectively using the tool post and the fly cutter spindle device, high-precision machining of transverse grooves and longitudinal grooves on a roll-shaped workpiece. The first and second multistatic probes are electrically coupled by a float-coupler.