Ushing the button while sewing immediately reverses sewing, and pushing the button A once stops the needle-up, and pushing twice does the needle-down. So, there is no reason to manipulate the pulley. In case where backtack is required during sewing, backtack is carried out by stopping the machine and touching the button B once. With respect to thread trimming after backtack, pushing the button B once and trimming carries out trimming without backtack.

The trimming mechanism is devised to adopt special material-used movable/fixed mes to increase wear-proof and durability and facilitate the adjustment of trimming power.

The length of thread left on the needle after trimming is minimized and the shortest leftover thread is provided available among similar models.

It is devised to cause the feed teeth movement and power from the movement of feed cam; it is the special device to generate powerful drive with less power.

The rotating mes resulted from the correction of previous mes' defects can serve a wide range of trimming from thin to thick thread and from cotton thread to nylon thread.

The bobbin catcher prevents the empty bobbin-rotating phenomenon prior to the trimming process by the use of its featured function so that the consistent lower thread tension is maintained.

Reverse sewing and needle conversion (up/down) features.

Backtack insertion and deletion features.