Reasons for sewing machine jumper:
1. If the needle is bent or the needle is installed reversely, replace the needle with a new one or install the needle correctly.
2. If the tension of the thread take-up spring is too large or there is no thread take-up spring, it can be solved by loosening the thread take-up spring and installing the thread take-up spring.
3. If the tip of the rotating shuttle has burrs, you can use fine sandpaper to lightly grind off the burrs.
4. If the position error between the rotary hook and the needle is too large, the problem can be solved by adjusting the position of the rotary hook and the needle.
Tips for using sewing machine
1. The origin of no needle movement: the upper thread is used up; the presser foot is not put down; the bobbin thread shaft is not in the precise position. Remedy: Replace the empty spool and re-identify the needle; lower the presser foot; press the bobbin spool and return it to the left; lower the buttonhole lever.
2. The origin of the sewing machine trying to stop: the presser foot does not match or the needle hits the presser foot; the needle falls and jams into the crochet hook. Handling: Replace the presser foot; remove the needle and install a new needle. Sewing machine repair video.
3. The origin of the upper thread breakage: improper threading method; thread knotted; thread tension is too large; the needle is tortuous, blunt or has sand holes; the needle size is incorrect; the needle is not sleeping properly; the needle and thread are not properly coordinated; the initial sewing speed Too fast; threading without thread take-up. Handling: Restart the thread in general; eliminate knots in the thread; adjust the pressure of the thread clamp; replace the needle; replace the needle of the appropriate size; properly sleep the needle; change the thread or the needle; start the sewing machine at a medium speed; check the threading procedure.
