Device for creating reverse stitching data for a sewing machine

A device for creating stitching data for a sewing machine including an input device for entering coordinate values and commands, and storage means for storing in an input order operational data for a stitching pattern comprising at least one of start data, thread trimming data, end data, stitch data and control data for the sewing machine generated by operating on the coordinate values entered in the input order from said coordinate input device, comprising:

• reading means for reading the stored data in an order reverse to said input order, beginning with a final data for said stitching pattern;
• analyzing means for judging that the data read from said reading means is any one of at least start data, thread trimming data, stitch data and vacant data;
• data converter means responsive to said analyzing means for converting at least one of said data read from said reading means into an appropriate type of data for a reverse sewing operation;
• and
• writing means for storing each data converted by said data converter means into said storage means.

A device for creating stitching data for a sewing machine including an input device for entering coordinate values and commands, and storage means for storing in an input order operational data for a stitching pattern comprising at least start data, thread trimming data, end data, vacant data, stitch data and control data for the sewing machine generated by operating on the coordinate values entered from said coordinate input device, comprising:

• reading means for reading the stored data in an order reverse to said input order, beginning with the final data for said stitching pattern;
• analyzing means for judging that the data read from said reading means comprises start data, thread trimming data, stitch data or vacant data;
• a data converter means responsive to said analyzing means for automatically converting the coordinates of each said stitch data to coordinates providing a reverse sewing direction, and converting others of said data to data appropriate for said reverse sewing direction;
• and
• writing means for storing each data converted by said data converter means into said storage means in order.

A method of generating stitching data for a sewing machine comprising:

• generating forward stitching data including at least start-type data, thread trimming-type data, end-type data, and stitch-type data;
• storing said data in a given order;
• reading said stored data in an order opposite to said given order;
• p1 analyzing said read data to identify the type of data;
• and
• converting said read data on the basis of said identified type of data.