Sewing machine jumper

We may all know about sewing machine thread skipping in our daily life, but what should we do if the sewing machine thread skipping occurs when we are sewing clothes? Many women have responded that the sewing machine is a relatively old one, and it has always been used for only a few days and then taken out for running-in, and it is still working well. Let's take a look at the relevant introduction below.

The reason for sewing machine thread skipping is actually because the threading method is actually very incorrect. Re-thread it according to the "threading diagram" method, and the straight needle is very incorrect when installing. The way to check the needle is also the height and facing position. Move the needle downward slightly in front of the needle plate hole.

The first stitch breaks, and the broken thread end looks like a cut. Product reason: The needle is installed upside down or not fully installed, causing the needle to be too low. The sewing material is too hard, the needle is too thin or the presser foot pressure is too high. Solution: Check the installation of the needle and whether the needle bar connecting shaft screws are loose. Replace the needle or adjust the presser foot pressure.

The sutures are curled at both ends of the cut and have short whiskers. Product reason: The thread is too tight or the thread is tangled during sewing. The sewing thread is squeezed into the guide groove of the shuttle bed by the shuttle. The sutures are brittle and easy to knot, of poor quality, and have burrs at the thread crossing. Solution: Change the pressure of the wire clamp and check the wire passing line to eliminate the entanglement. Check the wear of the shuttle and replace it if necessary. Sand the areas where the stitches have crossed and replace the stitches. The thread suddenly breaks during sewing and the upper thread fluctuates in a curved shape. Product reason: The shuttle bed is not properly positioned and the upper thread is rolled into the shuttle bed. The bobbin case is not locked or suddenly shifts during sewing. The quality of the shuttle is poor, the shuttle core spring is too long or the core sleeve is oval. Solution: Re-adjust the position of the shuttle bed, reinstall the shuttle, and replace the shuttle with the center sleeve.

However, the sewing machine skipped thread situation occurred when the bottom thread suddenly broke at the sewing terminal. The lock core is very unreasonable, with an oval inner diameter. When such a situation occurs, it is necessary to promptly replace the bobbin case, Xuansong the bobbin spring screw, rewind the bobbin thread, and replace the bottom line of the machine. We must pay attention to these situations.