The sewing machine stuck when it hit it, and the hand wheel did not move. After unpacking, the spindle is found to be on which axle and the spindle will rotate about 360 degrees

Make an abnormal noise and the bottom line can not be sewn onto the cloth. Which expert is going on?

Replace shuttle shell

The spindle doesn't come in properlyAlso, the needle should be replaced

Hello, my friend. I'm a needle mechanic. I'll teach you. According to your description, the large arc (spindle housing) screws may have loosened and displaced,! You put the machine back open, the shuttle roots have two small screws loosened, and then left the big arc (shuttle) of the shuttle tip to live right hand needle, shaking the pulley will be under the needle to the lowest point, and then continue to shake up the pinhole just in the shuttle tip following 1.5MM position (i.e. a needle bar thickness), and the needle tip just pay attention to the shuttle hair trace on the line, next to the tight to the broken needle, too far to skip, and then tighten the two screws... I hope I can help you, do not understand, please continue to ask, hope to adopt!