| 摘要 |
<p>An electronically controlled sewing machine which, in addition to the capability to stitch in the longitudinal direction, may selectively feed a work material in a selected right or left lateral direction. Additionally, bight pattern information may be taken from a memory means of the sewing machine and applied to the feed system thereof in order to obtain lateral patterning. In order to obtain lateral feeding, a straight stitch pattern is selected from the memory means in order to provide null or zero bight signal indicative of center needle position. Simultaneously, the signal from the arm shaft position sensor is applied to the bight actuating circuit, this arrangement providing for motion of a sewing needle in one lateral direction while in a work material, and in the other lateral direction while out of a work material. By applying the signal from the arm shaft position sensor to a selected inverting or non-inverting terminal of an operational amplifier in the bight actuating circuit, a selected right or left lateral feed direction may be obtained. In order to obtain lateral patterning, the signal from the arm shaft position sensor is directly applied to the selected terminal of the operational amplifier in the bight actuating circuit. Concurrently, the bight pattern information released from the memory means is transferred to the feed actuating circuit.</p> |
