1. Fix the wood to be rounded on the workbench.

2. Pick up the cylindrical planer, aim its blade at the wood surface, and the blade forms a 45-degree angle with the wood surface.

3. Place the edge of the cylindrical planer gently on the wood surface, and push it forward hard to make the planer cut into the wood surface.

4. When pushing the cylindrical planer, keep a certain speed and strength, and keep the angle between the edge of the planer and the wood surface unchanged.

5. After planing a circle, gently rotate the external planer and push the planer again until the required round surface is planed.

6. After planing, use tools such as sandpaper or grinder to trim the planed surface to make it smoother and flatter.