CH595674

An incremental belt transport device with adaptive gain control and a rotating head magnetic tape unit, comprising: a take-up reel; a motor functionally connected to rotate said reel; a supply of tape; rotary means in cooperation with a stretch of tape running between said supply and said take-up reel, following a transverse or lateral path of travel across the width of said stretch of tape; said tape having a plurality of data tracks distributed at intervals and having servo-control rates for at least certain tracks; transducer means capable of operating by reading said servo-control indices in order to determine the lack of alignment of said rotary means with its data tracks; means for generating an advance order or tape step; means for detecting the excess of stroke and the defect or shortness of stroke of the engine; means for comparing the excess and defect of stroke with a predetermined threshold value; and means for adjusting the motor gain to minimize motor oscillation. (Machine-translation by Google Translate, not legally binding)