Electromagnetic active compensator of a yarn loop at a workstation of a textile machine and controlling method thereof

Abstract

The invention relates to an electromagnetic active compensator of a yarn loop at a workstation of a textile machine, and a controlling method thereof. The compensator comprises a compensating arm mounted on a cylindrical magnet or on a shaft with a magnet, which is mounted rotatably about its longitudinal axis between the magnet pole extensions, which is associated with an electric control coil connected to a power source and to a control device, the compensator comprising a position sensor of the compensating arm. The position sensor of the compensating arm comprises at least two mutually spaced sensing elements, which are coupled to a control device. The method is used for controlling the motion of the compensating arm, whereby the yarn is acted upon by one end of the compensating arm inthe section between a draw-off mechanism of yarn and a winding device of yarn, while maintaining stable tension in the yarn, thereby sensing the position of the compensating arm. Furthermore a signalabout the position of this compensating arm is carried to the control device for the yarn loop compensation, wherein the operation of the compensator, the motion of the compensating arm and the magnitude of the force exerted by the compensating arm are controlled according to the signal.

Description

technical field [0001] The invention relates to an electromagnetic active compensator for yarn coils at the workbench of a textile machine, comprising a compensating arm mounted on a cylindrical magnet or a shaft with magnets around its longitudinal axis Rotatably mounted between pole extensions associated with electrically controlled coils connected to a power source and control means, the compensator includes a position sensor of the compensating arm. [0002] The invention also relates to a method for controlling an electromagnetic active compensator, wherein the movement of the compensating arm is controlled, whereby one end of the compensating arm acts on the yarn in the section between the yarn drawing mechanism and the yarn winding device, At the same time a constant tension is maintained in the yarn. Background technique [0003] During the winding of the yarn on a cross-winding bobbin on a spinning machine (such as an open-end spinning machine or on an air-jet spin...

AI Technical Summary

Problems solved by technology

However, there are disadvantages consisting of limited maneuverability in certain situations, especially in relation to the specific needs of operations and manipulations that take place at the workbench to be performed during transients, such as spinning yarn, breaking Yarn, changing bobbins, etc.

However, CZ PV 2016-102 does not describe in more detail how the signals of the sensors are processed in the control unit

Although the device according to CZ PV 2016-102 has some advantages, it still does not allow adjustment of the trajectory and force of the compensating arm during the entire compensating cycle, ie during the entire range of motion of the compensating arm

Furthermore, there are disadvantages regarding limited controllability in certain situations, certain states such as in the idle state outside of loop compensation, and when operating the compensating arm in extreme positions, etc.

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