Precautions for installing the needle

There are three points to pay attention to when installing the needle:
1. The plane of the needle handle of the needle is backward.
If the needle handle is reversed, sewing will not work properly.
2. Push the needle up to the top in the needle groove of the needle bar.
It is very important to push the needle up to the top, otherwise it cannot be used normally.
3. Tighten the needle clamp screw appropriately, but do not overtighten the screw.
This is most easily overlooked. "Appropriate" means that the screw is just tightened, that is, the screw feels a little resistance when it is screwed. Use a little force to stop it (the needle is already firmly installed at this time).
Some people worry that the needle will fall, and tighten the screw too hard, which may damage the needle clamp or screw.