Patent ID: 6266573
Filing Date: 2001-07-24
Classification: D01G,D01H,G05B

Abstract:
A process for controlling draft of textile fiber material in a drafting textile machine drafting system, said process comprising the steps of:measuring a characteristic of the fiber material with a measuring device prior to entry of the fiber material into the drafting system and generating measured values from said measuring step;correcting the measured values;drafting the fiber material at the drafting point of the drafting system by controlling drafting elements of the drafting system as a function of the corrected measured values; andwherein said step of correcting the measured values further comprises the control steps of:transmitting the measured values to a correction device arid with the correction device, generating a mathematical simulation of a draft regulation error curve that compensates for any combination of operating properties of the drafting elements, magnitude of fiber material thickness deviation from a target value, and the gradient of the fiber material thickness deviation;generating error correction values with the correction device based on deviations between the draft regulation error curve and the measured values; andapplying the error correction values to the measured values prior to obtaining the corrected measured values.