Both needle thread tension and bobbin thread tension have been decreased after reinvestigation of the double chainstitching mechanism. Furthermore, the stitch dial, gauges and looper have been dramatically improved, thereby forming beautifully finished seams and preventing puckering.

With its low-tension sewing capability and the best-suited timing among the needle, looper and feed, the machine forms even stitches with consistency at all times. The machine also prevents stitch skipping at a high speed to help promote high-grade manufacuring.

Newly developed folders are equipped as standard for the machine. The folders are designed to match the presser foot and allow overlapping material to be fed smoothly under them. They are easy to use and improve consistency in sewing. Many different kinds of folders are prepared in accordance with the materials to be used, ranging from folders for extra heavy-weight materials to medium-weight materials.

The shape of the bed has been designed to allow the operator to handle it with ease. The push-button type stitch length dial has been introduced to change the feed amount. The timings of the feed driving cam and the looper rocking cam can be separately adjusted. All of these features are designed for easier operation and maintenance.