How To Assemble And Disassemble The Sewing Machine Lever

　　 Compression lever It is also called the presser bar. Its main function is to deliver cloth with the feeding tooth, and control the material to swing. This part is not easy to fail, but if the operation is not proper and the pressure adjustment is not suitable, it will still appear when the material is stopped or broken. In addition, when the sewing work is finished, the foot wrench is not lifted in time, which causes friction between the presser foot and the feeding tooth, causing the bottom of the presser foot to be worn. As long as we master its structure and performance and take corresponding measures, we can avoid or reduce the above problems of sewing equipment.

The compression rod part is made up of more than ten parts, and its pressure is mainly produced by the close coordination of the two parts of the pressure regulating screw and the pressing spring. If it is necessary to increase or decrease the pressure, as long as the screw is screwed down or upwards, the pressure of the presser foot is too large, and the material will be chewed. Otherwise, too small will cause the swaying of the fabric or the uneven speed of the walking.

Tightening rod Disassembly and assembly The pressure rod usually needs not to be dismantled, and the failure is mostly adjusted from the outside. When the pressure rod and the guide and other parts are worn or inside, the oil is deposited. It needs to be cleaned and it is to be dismantled, repaired or replaced.

Before removing the lever, remove the panel on the nose first, then you can see all the accessories of the inner compression lever. The position of the pressing rod parts can be removed in sequence. First, screw off the foot screw, remove the presser foot, release the guide screw, and the pressure lever can be pulled out from above, so that both the guide frame and the pressure spring can be removed at the same time. Finally, the screwdriver screws are screwed down by hand. The remaining three parts, as long as the screws are released, the pressure wrench and the spanner shaft can be pulled out. After all the pressing rod parts are completely disassembled, clean with oil and check carefully whether there is any damage. In particular, it is necessary to note whether the guide bar of the pressing rod and the clamping rod has sloshing or grinding. If it is found that two parts are damaged, it is necessary to replace the new sewing machine accessories. If the bottom of the movable presser foot is worn out, the groove can be leveled and then installed.

Installation of the clamping rod: all the pressing rod parts to be dismantled. Familiarize the relationship between the parts before installation. Then install them sequentially. First, the spanner is put on the pin. After the pin is inserted into the shell, it is fixed with top wire. Sewing machine The pressing rod is inserted from the upper part of the head to the hole of a human rod. When inserted into the middle of the casing, the guide frame is sheathed on the pressing rod and continues to insert the lower hole of the human chassis. At the same time, the pressing pin and the screw are installed in the screw hole of the pressing rod at the same time. Finally, the two parts of the pressure spring and the pressure regulating screw are installed in the upper end screw holes of the cabinet by the center line. When all the parts are finished, check whether the presser plane is tightly pressed on the needle plate. If it is not tight, the foot wrench should be lifted, then the guide screw can be loosened, and the pressing rod will move down, so that the distance between the presser foot and the needle plate can be adjusted to 7-8 millimeters.