摘要:
In the method for setting a cleaning threshold for an elongated textile test material, such as yarn, on an electronic measuring head, a first cleaning threshold, which is dependent on at least two parameters of the test material, between admissible and inadmissible imperfections is established in the test material, represented in a diagram as a first cleaning curve (14) and transmitted to the measuring head. A second cleaning threshold, which is dependent on the at least two parameters of the test material and differs from the first cleaning threshold, between admissible and inadmissible splices in the test material is automatically calculated from the first cleaning curve, represented in a diagram as a second cleaning curve (16) and transmitted to the measuring head. In this way, a cleaning threshold for splices is determined in a simple manner, which provides differentiated criteria for the elimination of splices.
摘要:
For characterizing a yarn that is moved along the longitudinal direction thereof, measured values of a property of the yarn are recorded along the longitudinal direction of the yarn. Values of a parameter of the yarn are determined from the measured values. An event field (3) is provided, the x axis (31) of which indicates an extent (L) of parameter values in the longitudinal direction and the y axis (32) of which indicates a deviation (ΔM) of the parameter from a setpoint value. Densities of events in the event field (3) are determined from the values of the parameter and the extent (L) thereof in the longitudinal direction. A test piece of the material is calculated in the event field (3) as an area (4) that is bounded on the one hand by the x axis (31), on the other hand by the y axis (32) and also by a line (41) that substantially follows a constant event density. The area (4) is numerically specified. At least one value of the numerical specification is output as a characteristic of the yarn.
摘要:
The method is used to establish a clearing limit of an electronic clearing system for an elongated textile test material such as yarn. First, a statistical representation of the test material is determined by means of measurements of the test material (101). Based on the statistical representation, a clearing limit is calculated (102) and proposed for use, wherein a length-related number of impermissible occurrences to be expected with said clearing limit is calculated (103) and output (104). An operator can comment on the number of impermissible occurrences to be expected (105), whereupon the clearing limit is automatically established (109) according to the opinion. The method is user-friendly and easy to perform.
摘要:
The yarn clearer comprises a measurement head (40) with a capacitive measuring cell (5) and an optical measuring cell (6) for detecting characteristics of a yarn (90). An evaluation unit (45) compares the detected yarn characteristics with predetermined quality criteria. A cutter device (10) cuts the yarn (90) upon a cut command from the evaluation unit (45). The capacitive measuring cell (5) detects yarn-mass variations and the optical measuring cell (6) detects yarn-diameter variations. The evaluation unit (45) Outputs an unevenness cut command if the yarn-mass Variation detected by the capacitive measuring cell (5) and/or the yarn-diameter Variation detected by the optical measuring cell (6) do not comply with the predetermined quality criteria. Both the capacitive measuring cell (5) and the optical measuring cell (6) further detect foreign matter contents in the yarn (90). The evaluation unit (45) Outputs a foreign-matter cut command if the foreign-matter content detected by the capacitive measuring cell (5) and/or the foreign matter content detected by the optical measuring cell (6) do not comply with the predetermined quality criteria. The yarn clearer is versatilely usable.
摘要:
The method is used to characterize a yarn moved along the longitudinal direction thereof. Measured values of a property of the yarn along the longitudinal direction of the yarn are captured. The measured values are used to determine values of a yarn parameter. An event field (3) is provided, which contains a quadrant of a two-dimensional Cartesian coordinate system, the abscissa (31) of which indicates an extension of yarn parameter values in the longitudinal direction and the ordinate (32) of which indicates a deviation of the yarn parameter from a target value. The values of the yarn parameter and the extension thereof in the longitudinal direction are used to determine the densities of events in the event field (3). A yarn body is depicted as a surface (4) in the event field (3). The surface (4) is delimited both by the abscissa (31) and by the ordinate (32), and furthermore by a line (41) in the event field (3), which substantially follows a constant event density. The depiction of the yarn body allows the quick and efficient specification of a cleaning boundary (6).