Method and apparatus for monitoring and controlling winding operation of a winding station in a textile winding machine
AssigneeW. Schlafhorst AG & Co.
InventorsFerdinand-Josef Hermanns, Rolf Haasen
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Abstract
In a textile winding machine of the type wherein yarn is cross-wound onto a bobbin peripherally driven by a friction roller, the winding operation may be monitored and controlled to achieve a high winding quality by constantly varying the time period per revolution of the friction roller, constantly measuring the respective time periods per revolution of the bobbin and the roller, at least intermittently comparing the measured revolution time periods, and regulating the friction roller drive or stopping the winding operation altogether or otherwise intervening in the winding operation as a function of deviations of the comparison result from established theoretical values.
Claims28
A method of monitoring and controlling winding operation of a winding station in a textile winding machine of the type wherein a bobbin is rotatably driven by a driven friction roller in peripheral contact with said bobbin for winding a traveling strand about said bobbin, said method characterized by the steps of essentially constantly varying the time period per revolution of said friction roller while constantly measuring the time period per revolution of each of said friction roller and said bobbin and at least intermittently comparing the time periods per revolution of said friction roller and said bobbin, establishing theoretical values for the result of comparison of the time periods per revolution of said friction roller and said bobbin over the course of a winding operation, and selectively controlling regulation of the drive of said friction roller, intervention of said winding operation, and stopping of said winding station as a function of deviations in said comparison result from said theoretical values.
Apparatus for monitoring and controlling winding operation of a winding station in a textile winding machine of the type wherein a bobbin is reotatbly driven by a friction roller in peripheral contact with said bobbin for winding a traveling strand about said bobbin, said friction roller being driven by an associated drive means, characterized by means associated with said bobbin for measuring a value proportional to the time period per revolution of said bobbin, means associated with said friction roller for measuring a value proportional to the time period per revolution of said friction roller, an electronic calculator operatively connected with each said value measuring means, said calculator comprising a comparator for comparing the measured values of said bobbin and said friction roller and means or establishing theoretical values for the result of comparison of said measured values, said calculator being operatively associated with said drive means for selectively controlling regulation of said drive means of said friction roller, intervention in said winding operation, and stopping of said winding station as a function of deviations in said comparison result determined by said comparator from said theoretical values determined by said establishing means of said calculator.
Apparatus for monitoring and controlling winding operation of a winding station in a textile winding machine of the type wherein a bobbin is rotatably driven by a friction roller in peripheral contact with said bobbin for winding a traveling strand about said bobbin, said friction roller being driven by an associated drive means, each of said bobbin and said friction roller having an associated pulse generator adapted to emit one pulse per revolution thereof, and wherein an electronic calculator is operatively connected to said pulse generators, characterized in tha said electronic calculator comprises a freuency generator, a first time period counter operatively associated with said frequency generator and said pulse generator of said bobbin for measuring a frequency value proportional to the time period per revolution of said bobbin, a second time period counter operatively associated with said frequency generator and said pulse generator of said friction roller for measuring a frequency value proportional to the time period per revolution of said friction roller, a comparator for comparing the measured frequency values of said first and second counters, and means for establishing theoretical values for the result of comparison of said measured frequency values, said calculator being operatively associated with said drive means for selectively controlling regulation of said drive means of said friction roller, intervention in said winding operation, and stopping of said winding station as a function of deviations in said comparison result determined by said comparator from said theoretical values determined by said establishing means of said calculator.
Dependencies are inferred from the claim text.