| 摘要 |
<p>A sewing method and apparatus for sensing a characteristic of a workpiece to be sewn and then accurately positioning or registering the workpiece at a predetermined location or registration position at a sewing station, thereby facilitating reducing tedious manual registration, is disclosed. The method and apparatus for positioning a workpiece (14) relative to a predetermined position associated with a sewing station includes the steps of providing a transport (62) for the workpiece having a registration stop (74), placing the workpiece onto the transport so that an edge of the workpiece is aligned with the registration stop, sensing a leading edge (90) of the workpiece during advancement thereof and generating a leading edge signal in response thereto, sensing a trailing edge (92) of the workpiece during advancement thereof and generating a trailing edge signal in response thereto, determining a position of the workpiece relative to the predetermined position based upon the leading edge signal and the trailing edge signal, and transporting the workpiece a distance based on the determined position of the workpiece.</p> |
