Automatic pattern generation type sewing machine
AssigneeKabushiki Kaisha Yaskawa Denki Seisakusho
InventorsSadaaki Nanai, Akinobu Iwako
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Abstract
In an automatic pattern generation type sewing machine, a function generating device generates stitch positions using a signal synchronous with the rotation of the armshaft of the sewing machine, a digital signal generating device provides digital signals corresponding to the stitch positions, and a servo driving device, using the digital signals, moves the cloth or the needle, to thereby form a variety of geometrical stitch patterns automatically.
Claims8
In an automatic pattern generation type sewing machine, a digital signal generating device including function generation means for sequentially calculating stitch positions in accordance with an arithmetic function and selected input parameters and means for outputting digital signals corresponding to the calculated stitch positions, said function generation means being operable in accordance with signals synchronous with the rotation of the arm shaft of the sewing machine and with pulses from a clock pulse generator which have a higher frequency than said synchronous signals, and a servo driving device which employs said digital signals as feed and bight positions of the needle of said sewing machine to move a piece of cloth or the needle and thereby form a particular stitch pattern.
Dependencies are inferred from the claim text.