The Model

This hook is most convenient for filling the bobbin. Spool of the shuttle is visible through the transparent window on the needle plate. This is handy because you can easily estimate the amount of the remaining thread on the bobbin. Machine equipped with such a hook less vibrate as the shuttle rotates, rather than swinging. It should be noted that in machines with a shuttle so much less tangled bobbin thread. Horizontal hook does not require lubrication.

The disadvantages of such a shuttle can be attributed not easy adjustment lower thread tension - in order to reach the adjusting screw is necessary to remove the needle plate. Vertical canoe double used in the construction of expensive sewing machine production Pfaff and Bernina (in series machines Artista). Shuttles similar design used in professional sewing machines. The main advantage - high reliability. Machine equipped with such a hook and vibrate less than low-cost designs and also reduce the likelihood of tangling the bobbin thread. An important advantage of this design to a horizontal shuttle is convenient tensioning the bobbin thread. Thread tension to get a quality weld is necessary that the upper and lower thread interwoven in the thickness of the material, rather than on its surface.

Providing the right weave achieved tensioning strands. Upper thread tension usually varies with a special controller, which is located on the sleeve of the machine. The center position is sometimes referred to as 'auto' and corresponds to the most commonly used tension. Some manufacturers (eg Brother in the model nx 600) declare the existence of the automatic thread tension adjustment depending on changes in the thickness of tissue.