Method and device for dynamically controlling stitch formation in a sewing device
AssigneeBrother International Corporation
InventorMark A. Corio
Life of this patent
Estimating the term…
Abstract
A sewing device includes a material wrapped around a spool (the spool rotating around an axis), and a needle with a hole through which the material passes. A material feeding mechanism moves the needle and feeds the material in a feeding direction, thereby unraveling the material from the spool and stitching the material into a workpiece. A controller controls the material feeding mechanism to move the needle to a first rest position above a top surface of the workpiece. The first rest position is determined by the following formula: PR1=PW1+AT; wherein PR1 is the first rest position; PW1 is a first position of the top surface of the workpiece; and AT is an amount of material to be used in forming a second stitch in the workpiece after forming a first stitch in the workpiece.
Claims14
A sewing device comprising:
- a spool configured so as to rotate around an axis;
- a material which is wrapped around the spool;
- a needle with a hole through which the material passes;
- a material feeding mechanism which is configured to move the needle and feed the material in a feeding direction, thereby unraveling the material from the spool and stitching the material into a workpiece;
- and
- a controller configured to control the material feeding mechanism to move the needle to a first rest position above a top surface of the workpiece, the first rest position being determined by the following formula:
- PR1=PW1+AT;
- wherein:
- PR1 is the first rest position;
- PW1 is a first position of the top surface of the workpiece;
- and
- AT is an amount of material to be used in forming a second stitch in the workpiece after forming a first stitch in the workpiece.
A method of stitching a material into the workpiece, the method comprising:
- providing a spool which rotates around an axis, the material being wrapped around the spool;
- providing a needle with a hole through which the material passes;
- providing a material feeding mechanism which is configured to move the needle and feed the material in a feeding direction, thereby unraveling the material from the spool and stitching the material into the workpiece;
- moving the needle through the workpiece to form a first stitch;
- determining a first position of a top surface of the workpiece at which the first stitch is formed;
- moving the needle to a first rest position above a top surface of the workpiece, the first rest position being determined by the following formula:
- PR1=PW1+AT;
- wherein:
- PR1 is the first rest position;
- PW1 is the first position of the top surface of the workpiece;
- and
- AT is an amount of material to be used in forming a second stitch in the workpiece after forming the first stitch in the workpiece;
- and
- moving the needle through the workpiece to form the second stitch;
- determining a second position of the top surface of the workpiece at which the second stitch is formed.
Dependencies are inferred from the claim text.