Electronic traverse compensation control method for double-needle bed warp knitting machine

Abstract

The invention relates to a two-needle bar warp knitting machine electronic horizontal movement compensation control method. The method is characterized by comprising the following steps that 1, guideyarn guide bar operating lines of a two-needle bar are projected to a two-needle bar knitting plane, and a projection line of a guide needle guide eyelit core on each guide yarn comb is generated; 2,the distance between front and back needle bar knitted lines is obtained; 3, the shrinkage distance formed when the guide yarn comb swings to the farthest needle bar knitted line and the shrinkage distance formed when the guide yarn comb swings to the nearest needle bar knitted line are obtained; 4, when the guide yarn guide bar swings to the farthest needle bar knitted line, a shrinkage deviationvalue needing to be compensated for is obtained; 5, step 3 and step 4 are repeatedly executed, and the deviation compensation of all guide yarn guide bars on the opposite needle bar knitted lines ofthe two-needle bar warp knitting machine is worked out; 6, time sequence compensation is performed for each guide yarn guide bar. For each guide yarn guide bar, due to the fact that different shrinkage errors are generated by deflection of a push rod, precise active error compensation is performed.

Description

technical field [0001] The invention relates to an electronic traverse compensation control method for a double-needle bed warp knitting machine, which belongs to the technical field of mechatronics intelligent control of warp knitting equipment. Background technique [0002] The double-needle bed warp knitting machine has multiple guide bars and two needle beds parallel to each other. When making ordinary products, generally only the spacer comb in the middle needs to lay yarn on the front and rear needle beds, and the spacer comb in the front The needle bed or the yarn guide comb on the rear needle bed does not lay yarn on the opposite needle bed, but in special weaving techniques, sometimes it is necessary to place the yarn guide comb on the front needle bed or the rear needle bed not only into the opposite needle bed, but even It is required to lay the yarn or form a loop on the opposite needle bed, which requires the yarn guide bar to be placed in the front / rear two nee...

AI Technical Summary

Problems solved by technology

Although this method can reduce the retraction of the bar position caused by the deflection of the guide rod, it cannot fundamentally eliminate this error. It is a passive type to reduce the error and cannot actively compensate the error; moreover, the gauge of the current / rear needle bed increases When the error is reduced, the reduction of the error cannot be maintained, causing the yarn guide comb to be too small in the yarn holding gap on the opposite needle bed to easily break the yarn or wipe the needle, which will reduce the product quality and production speed. In addition, due to the use of an extended push rod , will increase the overall length of the machine, lengthen the tension spring of the guide bar, and make the mechanical mechanism more complicated, which is not conducive to the high-speed production of the machine

[0005] In the modern double-needle bed warp knitting machine based on electronic traverse, how to reduce or avoid the shrinkage error caused by the deflection angle of the push rod has not yet been seen.

Images