out toward drafting device 1 a that runs into drafting device 1 a drafting device 1 a is formed in this instance by an entrance roller pair middle roller pair and a supply roller pair only the lower roller 20 21 and 22 of the roller pairs is shown a draft of slivers 2 is realized by clamping the slivers or fleece 2 between the rollers of the various roller pairs that rotate with increasing circumferential speeds viewed in the direction of sliver travel the measured values of sensor 3 are converted by evaluation unit 4 into electric voltage values that represent the fluctuations of sliver thickness and are supplied to memory 5 this memory 5 is designed as a fifo memory first in first out and forwards the voltage with a defined delay in time to theoretical value stage 7 to this end memory 5 receives a number of impulses from impulse generator 6 that is a measure for the speed of slivers 2 running through sensor 3 the slivers are transported here from the pair of entrance rollers so that it is appropriate to couple impulse generator 6 to this roller pair using the impulses from impulse generator 6 the voltage values of sensor 3 are retained in memory 5 in accordance with the path traversed by slivers 2 between sensor 3 and drafting device la when the slivers or fleece 2 with the sliver piece to be regulated reach the fictitious draft location in the draft field of drafting device 1 a the corresponding measured value is released by memory 5 and an appropriate placing handling is performed which will be.