CD PROFILING WORLD PULP&PAPER 44 BETTER THAN GUARANTEED The project guarantee for coating profile improvement was 30%, but that goal was surpassed substantially by a 50% improvement in 2-sigma CD variation (see Figure 2). This quality improvement allowed a substantial increase in coating weight, thereby giving leverage for a return on investment. The mill staff report that, after several months, they find a better appreciation of their paper quality from their customers. The improved control The mill staff report that, after several months, they find a better appreciation of their paper quality from their customers Tasowheel has provided more than 200,000 OEM cross-direction actuators and dilution valves to paper machine manufacturers and control system suppliers for over 30 years. Now, they are supplying either standalone CD control systems with actuators, or providing actuators and control system solutions by partnering with local, experienced system integrators. In this case, the partner was the Italian Tecnerga company. The mill expected to improve both the top and bottom side profiles, and then increase the coating weight. The potential cost savings were an important part of their ROI projections. Burgo was familiar with Tasowheel from a project at their Sora mill: there, Tasowheel had equipped a Valmet coater with new actuators. The interfaces to the existing quality control system and the implementation of the CD control in the existing control system were handled by Tecnerga. Figure 2. Coating (patina) profiles have been improved by 50% at the Burgo mill.