Since the establishment, Dongguan Zuolong Machinery Co., Ltd. has always been focusing on the R&D and production of single needle sewing machine . With great production capability, we can provide customers with personalized solutions according to their needs. Zuolong Machinery's automatic cutting machine is widely applicable in the Manufacturing Machinery industry. Zuolong Machinery's single needle sewing machine feature stable performance, high quality, and easy operation. Besides, they are reasonably-priced and well-designed. The products we produce are of high quality and reasonable price. If needed, please contact us! The automatic cutting machine series has many styles to meet the diversified needs of customers.

Dezhou Qingyun, where is the sewing machine? Have your own factory,Ah Qingyun,

The old sewing machine came out of that country. First of all, let's check whether the needle is installed correctly,It's better to change a new machine needle.2, if still not,We went on to open the needle,Turn the needle to the lowest position,Look at the rotary shuttle tip from the machine needle 8mm or so.If yes,Then raise the machine needle 2.3mm or so,Look at whether the rotary shuttle tip coincides with the machine needle center.At this time, the needle and the tip of the shuttle can not be too tight,There should be 0.1 gap.3, sometimes the needle has a little bend will also jump the needle, the easiest way is to change the needle to try, if not, when the needle is installed, try a little bit, only a little bit, otherwise, it will break the line. sometimes such a simple operation is also very effective.4. it also has something to do with the thickness of your sewing.Thick things should be thicker,If the needle is fine, it will jump,If something thin,If the needle is thick, it will also jump.