Device to a drafting arrangement for fiber slivers, for example a distance, the determination of setting values for the preliminary draft

摘要

Apparatus at a distance, a combing machine or card for determining of setting values for the preliminary draft, with a drafting arrangement for fiber slivers, wherein the ratio of the peripheral speeds of the means - to input of which can be varied under rollers of the drafting arrangement, in order to change the distortion, and in the case of the measured values of a the same time, in the main - and / or predrawing zone characterizing value can be accommodated, characterized in that, for the drive of the middle roller pair (ii / 13) a separate drive motor (32) is provided, the variable characterizing the same time, on the central drive motor (32) can be measured, and a function of the same time, between the measured values of the characterizing value and the preamplifier is stretched between the values can be determined, the slope of end point or - region of a parameter is obtained, which for the adjustment of an optimal advanced train value (vv) of the drafting arrangement (2) is used.