The steps to close the automatic presser foot of jack a4 are as follows: 1. Turn the handwheel counterclockwise to stop the needle position at the highest position (if the needle position is already in the upper position, there is no need to turn it).

2. Loosen the right hand pin clamp screw (turn the screw counterclockwise)

3. Take out the original needle from the left side.

4. Lift the presser foot pin with the left hand and remove the extended data:

The presser foot is an essential part in the feeding mechanism of computer sewing machine. Various types of sewing machine presser foot play a very important role in the production process, such as sewing thread and sewing machine presser foot with hidden zipper, tucking sewing machine presser foot and so on. In different sewing operations, it is very important to choose different sewing machine presser foot. In Jack computer sewing machine, in order to improve sewing efficiency and reduce sewing operation procedures, the automatic presser foot lifting function of sewing machine is developed and designed. This function realizes automatic lifting through the hinged rotation of the electromagnet driving mechanism.