A method for operating a spinning station of a rotor spinning machine includes monitoring the yarn being and upon detection of a yarn defect, stopping the spinning station and removing the yarn defect. The method specifies a certain produced yarn length or a certain time interval of yarn production and a maximum number of yarn defects within the produced yarn length or time interval. Upon detecting and exceeding a maximum number of yarn defects within the produced yarn length or the time interval, a mechanical cleaning of the spinning rotor is carried out. Alternately, a certain minimum produced yarn length or a certain minimum time interval between two yarn defects is specified and the produced yarn length or time between detection of the yarn defects is recorded. Upon undershooting the minimum produced yarn length or minimum time interval between yarn defects, the mechanical cleaning of the spinning rotor is performed.

A method for operating a spinning station of a rotor spinning machine includes monitoring the yarn being and upon detection of a yarn defect, stopping the spinning station and removing the yarn defect. The method specifies a certain produced yarn length or a certain time interval of yarn production and a maximum number of yarn defects within the produced yarn length or time interval. Upon detecting and exceeding a maximum number of yarn defects within the produced yarn length or the time interval, a mechanical cleaning of the spinning rotor is carried out. Alternately, a certain minimum produced yarn length or a certain minimum time interval between two yarn defects is specified and the produced yarn length or time between detection of the yarn defects is recorded. Upon undershooting the minimum produced yarn length or minimum time interval between yarn defects, the mechanical cleaning of the spinning rotor is performed.

A textile machine with a plurality of similar workstations as well as display means and a central control device, wherein the display means is connected to the central control device and/or a workstation control device. The textile machine comprises a display means, which is designed as an LED light bar, a section of the LED light bar is assigned respectively to a workstation, and the LED light bar displays the respectively produced yarn batch and/or operating states of the respective workstation.

A textile machine with a plurality of similar workstations as well as display means and a central control device, wherein the display means is connected to the central control device and/or a workstation control device. The textile machine comprises a display means, which is designed as an LED light bar, a section of the LED light bar is assigned respectively to a workstation, and the LED light bar displays the respectively produced yarn batch and/or operating states of the respective workstation.

The present invention relates to a spinning position of an air-spinning machine having a spinning device, and to a spinning device for manufacturing a thread from a supplied fibre band by means of a circulating air flow, with a hollow spinning cone arranged in a spinning housing, the spinning housing having an envelope wall arranged coaxially and at a distance from the spinning cone and forming an envelope gap, and a nozzle device to which compressed air can be applied for producing an air flow circulating the spinning cone in the envelope gap. Furthermore, the present invention relates to a method for monitoring the spinning process on a spinning device. In order to provide a spinning position of an air-spinning machine with a spinning device which detects process disturbances reducing the thread quality as early as during the spinning process, and in order to provide a method for monitoring the spinning process on the spinning device, there is provision in the spinning device for the spinning cone and the envelope wall for forming a capacitor unit to have electrodes arranged opposite one another with the envelope gap interposed and forming an electrode pair.

A method is provided for contactless optical detection of yarn at a workstation of a textile machine in which the yarn moves in a sensing slot between a source of radiation and an optical sensor having at least one row of radiation sensitive elements, whereby shading of the individual radiation sensitive elements by yarn moving through the sensing slot is monitored and a state of the yarn is evaluated on a basis of the monitoring. The method monitors and evaluates a position of the yarn in the sensing slot or a time course of the position of the yarn in the sensing slot. A change is detected in the position or in the time course of the position of the yarn in the sensing slot corresponding to a yarn break before an end of the yarn break passes through the sensing slot. When the yarn break is sensed, a stop signal is generated for the workstation.

A method is provided for contactless optical detection of yarn at a workstation of a textile machine in which the yarn moves in a sensing slot between a source of radiation and an optical sensor having at least one row of radiation sensitive elements, whereby shading of the individual radiation sensitive elements by yarn moving through the sensing slot is monitored and a state of the yarn is evaluated on a basis of the monitoring. The method monitors and evaluates a position of the yarn in the sensing slot or a time course of the position of the yarn in the sensing slot. A change is detected in the position or in the time course of the position of the yarn in the sensing slot corresponding to a yarn break before an end of the yarn break passes through the sensing slot. When the yarn break is sensed, a stop signal is generated for the workstation.

A method to operate a ring spinning system containing a ring spinning machine having spinning positions and a winding machine having winding positions. Yarn is spun at the spinning position and wound to a cop. Values of a spinning parameter are determined at different times during the winding of the cop and stored as spinning data. The cop is transported from the spinning position to the winding position, where the yarn is rewound from the cop onto a bobbin. Values of a yarn parameter are determined at at least two different times during the rewinding, and stored as yarn data. The spinning data and the yarn data are assigned to each other such that they relate to the same yarn section. Based on the spinning data and yarn data assigned, an intervention is made on the ring spinning machine.

A method to operate a ring spinning system containing a ring spinning machine having spinning positions and a winding machine having winding positions. Yarn is spun at the spinning position and wound to a cop. Values of a spinning parameter are determined at different times during the winding of the cop and stored as spinning data. The cop is transported from the spinning position to the winding position, where the yarn is rewound from the cop onto a bobbin. Values of a yarn parameter are determined at at least two different times during the rewinding, and stored as yarn data. The spinning data and the yarn data are assigned to each other such that they relate to the same yarn section. Based on the spinning data and yarn data assigned, an intervention is made on the ring spinning machine.

A method is provided for contactless optical detection of yarn at a workstation of a textile machine. The yarn moves in a sensing slot between a radiation source and an optical sensor having at least one row of radiation sensitive elements. Shading of the individual radiation sensitive elements by yarn moving through the slot is monitored and a state of the yarn is evaluated based on the monitoring, which includes monitoring and evaluating a position of the yarn in the sensing slot or a time course of the position of the yarn in the sensing slot. A change is detected in the position or in the time course corresponding to a yarn break before an end of the yarn break passes through the sensing slot. When the yarn break is sensed, a stop signal is generated for the workstation.