CONTROLLING METHOD OF SLIVER UNEVENNESS IN DRAWING FRAME WITH AUTOLEVELER OF PLURAL DELIVERIES

摘要

PURPOSE:To correct the thickness of slivers in the respective deliveries in an allowable preset range, by measuring the thicknesses of slivers in the respective deliveries separately, and finely adjusting the rotation of draft motors with a reversible control motor. CONSTITUTION:The thicknesses of slivers passing through trumpets 25 of the respective deliveries are sensed by a control indicating apparatus 34 through a measuring apparatus 33. If the average thickness for several meters of the slivers is sensed to be beyond the allowable preset range, the rotational direction of the control motor 35 is directed to start the control motor 35, and a speed change operating shaft of a stepless speed change apparatus 17 is driven by a speed reduction apparatus 36 and a suitable mechanism to adjust the rotational frequency of the output shaft finely. Accordingly to the operation, the rotational frequency of back draft rollers 23 is adjusted finely to adjust the drafting ratios of the respective slivers independently for the respective deliveries.