Yarn monitoring apparatus for an open-end spinning turbine
AssigneeTeldix GmbH
InventorsHeinz Wehde, Fritz Schumann, Burkhard Wulfhorst
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Abstract
In the production of yarn in an open-end spinning turbine having an elastically mounted rotor bearing, a break in the yarn or an operating state which influences yarn quality is detected by means of a sensor which produces a signal representative of radial deflections of the bearing and an evaluation circuit which responds to the absence of and/or a change in the signal component produced by the sensor as a result of radial deflections created by the fiber material present on the rotor.
Claims12
A system for monitoring the production of yarn in an open-end spinning turbine, the turbine including a rotor rotatably mounted in a bearing and means elastically supporting the bearing so that the delivery of fiber material to the turbine and the production of yarn therefrom creates a spinning imbalance in the rotor which causes the bearing to undergo an oscillatory radial deflection at a frequency equal to the rate of rotation of the spinning imbalance, the spinning imbalance having, under normal operating conditions, a predetermined rate of rotation, different from the rate of rotation of the rotor, said system comprising:
- a measuring value sensor disposed for monitoring the radial deflections of the bearing and producing a measuring signal at least a component of which is representative of the spinning imbalance;
- and evaluation means connected to receive at least that component of the measuring signal which is representative of the spinning imbalance and responsive to a change in the frequency of such signal component for providing an indication of the occurrence of a deviation from normal operating conditions constituted by at least a break in the yarn of an operating state which adversely influences yarn quality.
Dependencies are inferred from the claim text.