System and method for on-line missing/gained filament detection

Details System and method for on-line missing/gained filament detection System and method for on-line missing/gained filament detection

1996-12-05

1998-11-17

Mansen, Michael

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 40, 242 18G, 242 36, 3644701, 36447015, B65H 5402, B65H 6302, G06G 764

Patent

active

058365320

ABSTRACT:
An on-line system and method provides for monitoring the build up of yarn package diameter which detects winding defects, including missing or gained filaments, in multifilamentary yarn spinning processes. The system and method derive and compare yarn package denier for several yarn packages wound on a common winding apparatus. Diameter ranges are used to divide a yarn package into various measurement zones. Denier measurements are derived for each zone from two on-line, real-time inputs: yarn package speed and time to traverse the specified zone. Comparison of denier for diverse packages being simultaneously wound on one winding apparatus are compare to each other and determined to be within a specified tolerance. The apparatus operator is notified of out of tolerance measurements so that remedial action may be taken. The system also provides for constant and periodic updating of the denier measurement algorithm to account for process variations.

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