The detection method includes generating a plurality of neural network models. The invention includes actively controlling the position of a tape guide used to support the tape as it passes over the tape head. The second power combinerdivider network combines processed signals into a second electromagnetic signal. A retracting linkage connected between the said other end of the drive arm and the slide frame serves to the slide frame from the extended to the retracted position with the footrest frame in the up position when the drive shaft is rotated in the opposite direction.