摘要 |
An automatic sewing machine is provided to optimize the rotational number of a motor and the moving timing of a cloth object when XY driving of a cloth presser is performed in a semi-closed loop control type. A position determining unit has operative quantity sensing units(76c) for sensing the operative quantity of pulse motors(76a,77a), which moves a cloth holding member to a predetermined position. A needle position sensing unit(2b) senses a position of a needle. A pattern storing unit(72) stores sewing pattern data. An operation control unit(1000) outputs command pulses, which keep a predetermined variation with real operation, to the pulse motors by one pulse. A storing unit stores the required time for outputting the command pulses. The operation control unit initiates the output of corresponding command pulses so that the output of the command pulses is ended when the sewing needle reaches a cloth object on a needle plate, considering the required time.
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