How to Tell the Crown of a Board
Understanding the crown of a board is crucial for anyone involved in woodworking or furniture making. The crown refers to the bow or curve that naturally occurs in wood due to its growth pattern. This curve can affect the stability and appearance of a board, making it essential to identify and address it properly. In this article, we will discuss how to tell the crown of a board and provide tips on how to work with it effectively.
Identifying the Crown
The first step in determining the crown of a board is to examine its surface. Look for a consistent bow or curve running along the length of the board. The crown can be either convex (upward curve) or concave (downward curve). To identify the crown, place the board flat on a level surface and observe the way it interacts with the surface. If the board sags in the middle, it has a convex crown. Conversely, if the board bows up in the middle, it has a concave crown.
Measuring the Crown
Once you have identified the crown, it is important to measure its severity. Use a straight edge or a level to measure the distance between the highest and lowest points of the crown. This measurement will help you determine how to proceed with the board. If the crown is minor, you may be able to work with it as is. However, if the crown is significant, you may need to take additional steps to correct it.
Correcting the Crown
If the crown is too severe to work with, you can take steps to correct it. One method is to flatten the board using a planer or jointer. Start by setting the machine to the appropriate depth, then pass the board through the machine multiple times until the crown is removed. Be sure to check the board’s flatness after each pass to avoid over-planing.
Another option is to use a hand plane or sandpaper to gently remove the crown. This method is more time-consuming but can be effective for minor crowns. Apply even pressure while working along the length of the board, gradually removing the crown.
Using the Crown to Your Advantage
Even if the crown cannot be completely removed, you can still use it to your advantage. For example, if you are making a table or a shelf, you can position the board with the crown facing up. This will help to distribute the weight more evenly, reducing the risk of the board sagging over time.
In conclusion, knowing how to tell the crown of a board is essential for any woodworker or furniture maker. By identifying and measuring the crown, you can determine the best course of action to ensure your project’s success. Whether you choose to correct the crown or work with it as it is, understanding the crown will help you create beautiful and functional pieces.
