EP 0803596 A3 19990714 - Minimum value determining regulation method at a drawing or carding machine
Title (en)
Minimum value determining regulation method at a drawing or carding machine
Title (de)
Minimalwert-suchendes Regulierungsverfahren an einer Strecke oder Karde
Title (fr)
Méthode de régulation déterminant une valeur minimale dans une machine d'étirage ou de cardage
Publication
Application
Priority
DE 19615947 A 19960422
Abstract (en)
[origin: EP0803596A2] A draw zone on a draw frame or card has an open loop controller (10) with upstream sensing to adjust the draw ratio imposed on the sliver (20). The settings of delay and/or gain (R,K) are determined by measuring several values of a quality determining parameter, such as coefficient of thickness variation (CV), to obtain the functional relationship with delay or gain and optimising on the minimum values. These optimum values are determined in a prior test run and are left unchanged during production. Also claimed is a simplified method of adjusting delay (R) by storing upstream sliver measurements (do(n)). These are rewritten and read cyclically at the same location. The number of storage locations of a cycle between test runs is altered according to the delay distance (R).
IPC 1-7
IPC 8 full level
D01G 23/06 (2006.01); D01H 5/42 (2006.01)
CPC (source: EP US)
D01H 5/42 (2013.01 - EP US)
Citation (search report)
- [A] EP 0617149 A1 19940928 - GROSSENHAINER TEXTILMASCHINEN [DE]
- [A] WO 9222692 A2 19921223 - SCHUBERT & SALZER MASCHINEN [DE]
- [AD] EP 0176661 A2 19860409 - ZELLWEGER USTER AG [CH]
- [A] DE 9320794 U1 19950216 - TRUETZSCHLER GMBH & CO KG [DE]
- [A] PATENT ABSTRACTS OF JAPAN vol. 012, no. 450 (C - 547) 25 November 1988 (1988-11-25)
Designated contracting state (EPC)
CH DE IT LI
DOCDB simple family (publication)
DE 19615947 A1 19971023; DE 19615947 B4 20071031; DE 59703932 D1 20010809; EP 0803596 A2 19971029; EP 0803596 A3 19990714; EP 0803596 B1 20010704; US 5771542 A 19980630
DOCDB simple family (application)
DE 19615947 A 19960422; DE 59703932 T 19970207; EP 97101944 A 19970207; US 82233997 A 19970320