生产纱条的精梳机具有初始拉伸阶段（10），其具有几对辊（11,12,14）和另外的拉伸阶段（40），其具有控制（35,50,48）以补偿短波 质量波动。 来自监视器（32）的信号控制第二绘图级（40）的驱动。 还要求的是其中纤维质量（8）在控制下拉伸并将拉伸的纤维质量聚集在一起进行测量的操作。 测量信号被传递给用于第一拉伸级（10）的控制（35,52,21）和用于第二拉伸级（40）的控制（35,50,48）。 纱线材料在离开监视器（32）时被拉出，并铺设（53）。

The invention relates to an apparatus for forming a sliver with a first, regulated drafting system (10) having a plurality of pairs of rolls (11,12,14) for the controlled stretching of the drafting supplied fiber material (8), wherein the nonwoven fabric delivered by the drawframe ( 28) are combined and fed to a measuring element (32) from which the measured fiber material afterwards to a second drafting arrangement (40) is transferred, wherein the regulating means (35,52,21) of the first drafting arrangement (10) for compensating mass fluctuations on the basis of the measuring device (32) signals emitted by including a predetermined setpoint from regulating in the drive of the first drafting arrangement (40). In practice, various control devices are known, in order to obtain a high quality fiber ribbon. In order to easily detect and compensate for short-wave and long-wave fluctuations in mass of a fiber mass submitted proposes a device, wherein the second drafting arrangement (40) is provided with a control device (35,50,48) to compensate for the short-wave fluctuations in mass, which on the basis of the measuring element (32 ) signals emitted in the drive of the second drafting arrangement (40) engages controlling.