Abstract:

We present a course of needle take-up demand in the zone of lockstitch formation by the needle and the bobbin hook, as well as a course of thread control by the take-up for selected machines with different types of thread take-ups. The classical (crank-rocker) take-up and single-axial disc take-up are distinguished. The possibility of shaping the thread control curve with a disc take-up by changing the number and position of its operating points has been established. The diverse character of changes to the thread overfeed in the feeding zone of the machines indicates the need to establish a set of criteria assessing the correctness of the selection of this overfeed. For determining the thread control curve by disc take-up, software was used to shape this curve.