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US 6,405,966 B1Granted
Process and cross-winding device for laying a thread
AssigneeBarmag AG
InventorsReinhard Lieber, Friedhelm Lenz
Life of this patent
Estimating the term…
Abstract
A method and an apparatus for traversing a yarn, wherein a traversing yarn guide is moved by means of an electric motor. The actual position of the yarn guide is continuously determined by means of a measuring device and supplied to a control device, which performs a comparison between the actual and desired positions of the traversing yarn guide, and the control device generates a corresponding differential signal for controlling the operation of the electric motor.
Claims25
A method of winding an advancing yarn to form a wound package, comprising the steps of
- traversing at least one yarn guide back and forth along a rotating winding tube by means of an electric motor, while guiding the advancing yarn through the at least one traversing yarn guide and onto the rotating winding tube and so as to define a traverse stroke,
- continuously monitoring the actual position of the at least one traversing yarn guide within the traverse stroke, while
- comparing the monitored actual position of the at least one traversing yarn guide with a predetermined desired position, and
- generating a control signal in response to a difference between the monitored actual position of the at least one traversing yarn guide and the predetermined desired position so as to control the operation of the electric motor and thereby accurately position the yarn along the entire traverse stroke in accordance with a predetermined winding program.
1 more element
An apparatus for winding an advancing yarn to form a wound package, comprising
- a winding spindle adapted for coaxially mounting a winding tube thereupon,
- drive means for rotatably driving the winding tube,
- a yarn traversing mechanism for reciprocating an advancing yarn along the rotating winding tube to form a wound package thereon, said yarn traversing mechanism including
- (a) at least one yarn guide,
- (b) means including an electric motor for traversing the at least one yarn guide along the rotating winding spindle and so as to define a traverse stroke,
- (c) a sensor for continuously monitoring the actual position of the at least one yarn guide as it moves along the traverse stroke, and
- (d) control means for comparing the monitored actual position of the at least one yarn guide with a predetermined desired position, and generating a control signal in response to a difference between the monitored actual position of the at least one yarn guide and the predetermined desired position so as to control the operation of the electric motor and thereby accurately position the yarn along the entire traverse stroke in accordance with a predetermined winding program.
4 more elements
An apparatus for winding an advancing yarn to form a wound package, comprising
- a winding spindle adapted for coaxially mounting a winding tube thereupon,
- drive means for rotatably driving the winding tube,
- a yarn traversing mechanism for reciprocating an advancing yarn along the rotating winding tube to form a wound package thereon, said yarn traversing mechanism including
- (a) first and second yarn guides,
- (b) means including a first electric motor for traversing the first yarn guide along the rotating winding spindle and so as to define a traverse stroke,
- (c) a sensor for continuously monitoring the actual position of the first yarn guide as it moves along the traverse stroke,
- (d) control means for comparing the monitored actual position of the first yarn guide with a predetermined desired position, and generating a control signal in response to a difference between the monitored actual position of the first yarn guide and the predetermined desired position so as to control the operation of the first electric motor and thereby accurately position the yarn along the entire traverse stroke in accordance with a predetermined winding program,
- (e) means including a second electric motor for traversing the second yarn guide along the traverse stroke in a direction opposite the direction of movement of the first yarn guide,
- (f) a second sensor for continuously monitoring the actual position of the second yarn guide as it moves along the traverse stroke, and
- (g) control means for comparing the monitored actual position of the second yarn guide with a predetermined desired position, and generating a control signal in response to a difference between the monitored actual position of the second yarn guide and the predetermined desired position so as to control the operation of the second electric motor and thereby accurately position the yarn along the entire traverse stroke in accordance with the predetermined winding program.
7 more elements
Dependencies are inferred from the claim text.