Caliper varying

1. Check the forming table: Ensure that the forming table is level and that a uniform sheet of paper is being formed on it. If the table is not level, adjust it accordingly. Also, make sure that the headbox is functioning properly and providing a consistent flow of stock.

2. Inspect the presses and press felts: Examine the presses and press felts to ensure they are in good condition. Any damage or wear on these components can lead to variations in caliper. Replace or repair any damaged parts as necessary.

3. Maintain an accurate crown: The crown refers to the shape of the rolls in the paper machine. It is important to maintain an accurate crown and loading appropriate to the crown used. This will help ensure consistent caliper measurements. Regularly check and adjust the crown as needed.

4. Use a modern traversing caliper measurement system: Invest in a modern traversing caliper measurement system. This type of system allows for accurate and continuous measurement of the paper’s caliper across its width. It can help identify any variations in caliper and assist in troubleshooting the issue.

By following these troubleshooting steps, you can identify and address the causes of caliper variations in paper production.