Double Needle Sewing Machine Jumping thread is a common sewing problem, thread jumping will cause the needle thread to be uneven and affect the sewing effect. Here are some common jumper adjustment methods for twin needle sewing machines:

Adjust the thread tension: Jumping threads may be caused by unbalanced thread tension. Therefore, it is necessary to check whether the tension of each thread is consistent one by one. If you find that the tension is inconsistent, you can adjust the thread tension screw. The adjustment method is to turn counterclockwise to reduce the tension, and turn clockwise to increase the tension. In addition, it is also necessary to check whether the line is correct and whether there is any winding or tension.
Adjust needle board spacing: Needle board spacing is also a common cause of skipped threads. It is necessary to turn off the sewing machine, adjust the needle plate distance with a needle adjusting plate screwdriver, and adjust the distance to a suitable position.
Adjust the position of the needle eye: The position of the needle eye also has a certain influence on the sewing effect. If the thread jump is caused by improper needle eye position, you can try to adjust the needle eye position. It is necessary to remove the needle plate, and then fine-tune the needle eye up, down, left, and right until the needle eye is in a proper position.
Replacing the needle: If none of the above methods can solve the jumper problem, consider r

Double needle sewing machine, double needle machine, double needle machine refers to a sewing machine with two needles, and the effect is that the double threads are juxtaposed and parallel to each other. A pair of trousers uses double needles less than flat lathes, so in the workshop, the matching of flat lathes and double needles is about 5:1, but it is indispensable. The efficiency of the double needle is high, and the double thread is parallel and neat. All kinds of double-needle machines have a very troublesome problem, that is, the machine is unstable. The maintenance rate is high, especially after a few years of use, and many phase times are a bit messed up. Many machine repairers can't adjust it well.
        First, we start with the needle post and feed dogs. First adjust the amount of cloth feeding (adjustment dial) to zero. When there is no cloth feeding, turn the flywheel so that the needle column is at the bottom dead point. Loosen the fastening screw of the horizontal feed rocker arm, and adjust the inner distance between the needle column and the presser foot rod to about 1.5mm. If it is not adjusted properly, it will cause skipping and broken needles. Note that the needle drop point of the feed tooth hole will change after adjustment, and the feed tooth should be adjusted to match. The cloth feeding time should be adjusted so that the engraving point of the horizontal cloth feeding cam coincides with the engraving point of the lower