Method and device for dynamically controlling stitch formation in a sewing device
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United States of America Patent
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May 20, 2014
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N/A
app pub date -
Mar 4, 2011
filing date -
Mar 4, 2011
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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:
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.
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