The paper mill did not consider a new headbox since the existing one provided good formation, so they relied on the profile control solution to improve the quality uniformity. formation, so they relied on the profile control solution to improve the quality uniformity. Cross-direction weight variation has over coating profiles and quality has also added to machine productivity in the form of faster grade changes and reduction of processing waste. CASE STUDY 2 REJUVENATED HEADBOX While Burgo targeted an improved performance of the coating stations, a specialty paper mill upgraded the grammage profile control capability of an older, manually-controlled open headbox by installing slice profile control actuators. The project included a link to an existing scanner and a new profile control system provided by a local partner. The old manual slice actuators were replaced by Tasowheel Forte-25010 high force motorised actuators. This actuator was selected because of the rigid slice lip construction. The actuator provides up to 35kN linear force, which was an optimal solution to ensure sufficient bending power of the lip and good CD control results. The focus of the project, commissioned in January, 2017, was to meet end- user quality needs and establish a high-level competitive position in the company’s niche market. The paper mill did not consider a new headbox since the existing one provided good WORLD PULP&PAPER 45 Figure 4. Swiss Quality Paper’s PM3 slice actuators. Figure 3. The Swiss Quality Paper installation.