Mixed use control method of large and small yarn bobbins

Abstract

The invention relates to a control method for mixed use of large and small yarn bobbins. The tension F is set on the man-machine interface and transmitted to a PLC controller. The PLC controller transmits the tension F and the calculated yarn linear velocity V to a DC servo controller. The measured revolutions R of the bobbin are transmitted to the DC servo controller. The number of revolutions R is the number of revolutions of the bobbin per unit time. The DC servo controller is based on the formula D=V / (R*π) , the output torque of the servo motor N=DF / 2, that is, N=FV / (2R*π), N is calculated, and finally the DC servo controller controls the output torque of the DC servo motor according to the calculation result, and the present invention ensures that yarns with different diameters The purpose of keeping the tension of the yarn out of the tube is the same, and it also ensures that the tension of the yarn tube remains constant during the process of changing from large to small, which improves the quality of warp knitting and warping, and reduces the difficulty and cost of production.

Description

technical field [0001] The invention relates to the field of textile manufacturing, in particular to a method for controlling the mixed use of large and small yarn bobbins. Background technique [0002] At present, some warping machines (such as split warping machines, plastic flat yarn and other warping machines) on the market are controlled by AC torque motors on the bobbins (such as chemical fiber mother silk, plastic flat yarn, etc.) All the torque motors use the same voltage to control the tension of yarn output from the bobbins, and there are many bobbins on the warping machine. This control method allows users to use bobbins with the same diameter. After winding and use, there will inevitably be differences in diameter. In the production process, this bobbin control method increases the inconvenience of use and causes waste of raw materials. Contents of the invention [0003] The object of the present invention is to provide a control method for mixing large and sm...

AI Technical Summary

Problems solved by technology

[0002] At present, some warping machines (such as split warping machines, plastic flat yarn and other warping machines) on the market are controlled by AC torque motors on the bobbins (such as chemical fiber mother silk, plastic flat yarn, etc.) All the torque motors use the same voltage to control the tension of yarn output from the bobbins, and there are many bobbins on the warping machine. This control method allows users to use bobbins with the same diameter. After winding and use, the diameter will inevitably be different. In the production process, this method of bobbin control increases the inconvenience of use and causes waste of raw materials.

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