1. When welding the cylinder of the cylinder, because the motor is not uniform or unstable in rotation, the cylinder will definitely move in the axial direction.
2. If three of the four rollers of the roller frame are installed on the same plane, and the other one is installed on a different plane, if welding is performed, the rollers will basically appear axial to the cylinder. The final phenomenon of the external force is the phenomenon of movement of the cylinder.
3. When the driving wheel and the driving wheel of the welding roller frame are on the axis, in the same plane but not parallel, the welding roller frame will also cause an axial external force on the cylinder of the cylinder, causing the cylinder to move downwards. The driving wheel and the driven wheel of the welding roller frame are not on the same plane.
4. But if the driven wheel and driving wheel of the welded roller frame are not on the horizontal line at all, the welded roller frame will cause an axial phenomenon of external force to the cylinder, which will cause the cylinder to move in a lower direction.