b'Once stock levels improved, the machine production rate was increased significantly.Figure 5. Total refining energy.One of the first effects seen on the machine was that the mid ply wet line moved back indicating improved drainage. The adjustment of the mid ply wet line is not achievable under normal running conditions due to poor drainability of the mid ply stock.Although the machine had steam availability on the 250gsm, the machine speed could not be increased due to low pulp supply level from the fibreline. Once stock levels improved, the machine production rate was increased significantly. Figure 6 shows machine production rate versus steam usage.Figure 6. Machine production vs steam rate.WORLD PULP&PAPER 21'