The patterns in the pattern files of industrial embroidery machines all take the stitch unit with control information as the basic pattern unit. The pattern file data mainly includes pattern information and sewing action information, which will be used for sewing control of each stitch. For the convenience of description, the following definitions are given first: the memory pattern file is the pattern file in Flash; the data of a stitch in the pattern is called a sewing frame; the pattern data uses 0.1 mm as the basic unit, and 0.1 mm is set as 1. Steps, the numerical values involved in this article, such as the size of stitch displacement, x, y, are all measured by the number of steps.

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