The hairspring belongs to the speed regulation system in the watch structure and is called the heart of the watch. The organic cooperation between them makes the watch rotate and swing back and forth in the watch machine, maintaining a certain speed and ensuring the accurate timing of the watch. Change the method as follows:

1, the balance wheel must be flat, that is, the rim of the balance wheel should be perpendicular to the pendulum axis;

2, to be round, not eccentric, that is, not oval;

3, to balance, that is, the weight around the balance wheel should be consistent;

4. The hairspring is installed on the balance wheel. The plane of the whole hairspring should be parallel to the plane of the balance wheel and cannot be skewed. The outer column of the hairspring is perpendicular to the hairspring plane and parallel to the pendulum axis;

5. When installed on the movement, the hairspring should be parallel to the pendulum splint. If the curve of the outer end of the hairspring is incorrect or the outer pile is skewed, the hairspring will tilt and the frame spacing will be inconsistent. There will also be a whole bowl-shaped or umbrella-shaped hairspring. This can adjust the height of the outer pile in the outer pile pipe to correct it.