摘要:
A method for forming the wound package of cylindrical cheeses on rotor spinning machines, wherein a crossing angle αM in a central zone of the bobbin traverse is less than 28° and a crossing angle αR in the end zones located adjacent the ends of the wound package is increased in respect to the central zone. The cylindrical cheeses thereby produced are distinguished by great running lengths, solid structure, good density distribution, and excellent unwinding properties.
摘要:
A method for forming the wound package of a conical cheese on rotor spinning machines, wherein a crossing angle αM in a central zone of the bobbin traverse is less than 28° and a crossing angle αR in the end zones located adjacent the ends of the wound package is increased in respect to the central zone. The cylindrical cheeses thereby produced are distinguished by long running lengths, solid structure, good density distribution and excellent unwinding properties.
摘要:
A method and device for determining the orientation of a cross-wound bobbin tube (1) having a yarn draw-off end face (27) configured as a tube tip (2) with a beaded edge (4) and an opposite end face (27) configured as a tube foot (3) without a beaded edge (4). A digital image of an end face (27) of the bobbin tube (1) is detected, the digital image is subjected to an edge detection to determine the object edges (6, 7, 8, 9) of the tube (1), a recognition parameter dependent on the width (b1, b2) of the circular ring (10, 11) formed by the object edges (6, 7, 8, 9) is determined, this recognition parameter is compared with a reference value and a conclusion is drawn about the orientation of the bobbin tube (1) depending on the result of the comparison.
摘要:
A service unit (16) for a cheese-producing textile machine (1), in particular an open-end spinning machine, has manipulation devices for repairing ordinary yarn breaks, an auxiliary yarn transport device (34) for piecing yarn following a cheese/empty tube exchange, and a control device (24) storing a first program with optimal operating parameters for piecing an ordinary yarn break and a second program setting differing operating parameters for producing a safety piecing following a cheese/empty tube exchange.