| 摘要 |
A sewing machine is provided to allow the height of the center two triangular pieces under the metal handle of a plow-blade to be set easily. A sewing machine comprises a center two triangular piece motor under the metal handle of a plow-blade; an encoder for detecting the rotation amount of the center two triangular piece motor; a sewing data memory unit; a pulse number detection control unit for detecting the drive pulse number corresponding to the rotation amount of the center two triangular piece motor; a pulse difference calculation unit; a control unit the height of the center two triangular pieces; and a sewing data preset control unit.
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