Abstract: A method for controlling and/or regulating a sewing machine, in particular an overlock sewing machine, for a sewing operation for mechanically producing a seam (1) within a base material (2), the method including the following steps: identifying a sewing operation or an upcoming sewing operation of the sewing machine (100); setting an upper sewing speed limit (vmax) of the sewing machine (100); setting a lower sewing speed limit (vmax) of the sewing machine (100); and carrying out the sewing operation at a sewing speed between the lower sewing speed limit (vmin) and the upper sewing speed limit (vmax). A device (10) for carrying out the method is provided, and for a sewing machine (100) having the device (10), and to a computer software product (70) for use in the device (10) or in the sewing machine (100), respectively, the computer software product (70) being configured for carrying out the method.

Abstract: A method and the device for displaying sewing processes to allow simulation of the formation of stitch patterns and embroidery patterns in sewing machines (1) and embroidery machines or in sewing simulators close to reality is provided. In the representation on the monitor (3) features, such as colors and the structure of the sewing material (2), are considered. By activating a simulation mode, the drive for the stitch formation unit can be disabled.

Abstract: A method and the device for scaling or changing embroidery patterns (1) for sewing machines that allows a quick calculation of optimized stitching data. For one or more different change factors qj, data sets dj with optimized stitching data (xji,yji) are stored. A target data set z with stitching data changed according to a given change value v is determined by selecting one of the stored data sets dj and performing an extrapolation or an interpolation with the associated stitching data (xji,yji). For a pattern with several sub-patterns, these sub-patterns can be changed individually and combined to form a changed pattern.

Abstract: A method and the device for displaying sewing processes to allow simulation of the formation of stitch patterns and embroidery patterns in sewing machines (1) and embroidery machines or in sewing simulators close to reality is provided. In the representation on the monitor (3) features, such as colors and the structure of the sewing material (2), are considered. By activating a simulation mode, the drive for the stitch formation unit can be disabled.