The method is for monitoring contamination in a stream of fiber flocks transported pneumatically in an airflow. Characteristics of entities, including contamination, in the stream of fiber flocks are detected and evaluated. Values of a first parameter and a second parameter of the entities are determined from the characteristics of the entities. An event field is provided, which contains a quadrant or a part of a quadrant of a two-dimensional Cartesian coordinate system, wherein a first axis defines the first parameter and a second axis defines the second parameter. The values of the first parameter and the second parameter determined for an entity are entered in the event field as coordinates of an event representing the entity. Thus, entities can be handled in a differentiated way.

The invention relates to a method for optimizing a spinning process, through which a fiber material fed in the form of raw fibers and output in the form of yarn passes, with respect to foreign materials. At a first position in the spinning process, a first foreign material information relating to the foreign materials is determined. At a second position in the spinning process, which is downstream with respect to the first position, a second foreign material information relating to the foreign materials is determined. The first foreign material information and the second foreign material information are associated with each other such that they relate to substantially the same sample of the fiber material. Based on the first foreign material information and the second foreign material information assigned thereto, a change is made to the spinning process to optimize the spinning process.

The invention relates to a method for optimizing a yarn production process in which foreign materials (90) are monitored in a textile fiber formation (9). The textile fiber formation (9) is illuminated with electromagnetic radiation from at least two color ranges. The foreign materials (90) are classified into different color classes according to their colors. If a sufficiently large random sample with classified foreign materials (90) is available, a frequency distribution of the foreign materials is determined for the color classes and compared with a reference frequency distribution. If the determined frequency distribution deviates from the reference frequency distribution, at least one of a set of multiple optimization actions is performed, e.g., a warning signal is output.

The invention relates to a card with a device for recognizing interfering particles, in particular trash parts, neps, shell neps, thick spots and/or foreign parts in a carded fibre web. The device comprises at least one sensor stationarily disposed in a web guiding element, which is disposed at the transition from a doffer to a stripper roll. The at least one sensor detects the fibre web on the doffer.

In one aspect, a textile machine for processing and/or transporting fiber material includes at least one processing unit configured to process and/or transport fiber material and at least one sensor unit configured to detect soiling on and/or at the at least one processing unit and/or damage to the at least one processing unit. The textile machine also includes at least one display unit configured to display the soiling on and/or the damage to the at least one processing unit.

The present, invention refer(c) to. a measuring device (200) for measuring stickiness, imperfections and imparities in textile fibers, in particular cotton fibers, such a device comprising a housing inside which. a pair of rollers (203a, 203b) are placed, arranged side by side to one another and rotating in opposite senses and between which a web of cotton fibers is made to pass, heating means for heating the rollers (203a, 203b) , detection means (205a, 205b) for detecting the IS sticky fractions of the web that adhere to the rollers after the passage of the web between them, removal means (206a, 205b) for removing from the rollers (203a, 203b) the sticky fractions adhering thereto, wherein the operation of the heating means is controlled by a processing and control unit as a function of the temperature of the rollers detected by temperature sensor means (207a, 207b) associated with them.