Patent Number: 6,167,824

Title: Sewing machine having work holder

Abstract: A sewing machine calculates a standard sewing speed N to the Pth stitch, and a position of the Pth stitch. When the Pth stitch point is in a first area within a work holder, the sewing speed is determined to be N rpm. In a second area, it is determined to be N-100 rpm. In a third area, it is determined to be N-200 rpm. The distance from the first area to the connecting part of a work holder driving mechanism is the shortest. The distance for the second area is the next. The distance for the third area is the longest. Therefore, the larger the damping by the movement of the work holder is, the slower the sewing speed is set to. The sewing speed for each stitch created by the stitch formation mechanism can be set as fast as possible so that the damping is substantially settled. Thus, the quality of sewing can be secured and the entire sewing speed can be increased, thereby reducing the sewing time.

Inventors: Tomita; Shintaro (Nagoya, JP)

Assignee: Brother Kogyo Kabushiki Kaisha

International Classification: D05B 19/00 (20060101); D05B 19/16 (20060101); D05B 21/00 (20060101); D05B 019/12 (); D05B 021/00 (); D05C 007/00 ()

Expiration Date: 01/02/2018