digitalcontrollab 3701 NW 40 th Terrace, Suite 1 Gainesville, Florida 32606 USA

1. MineralScan MillSlicer Polar Plot Toe Position (PMC AG Mill Data) 0o 0o Mill Rotation Mill Rotation Under-filled Mill Full Mill 90o 90o Toe = 136o Real-time Toe Angle Toe = 149o 180o 180o Note: As the mill fills, the load shifts up on the liner. Toe Angle 0 degrees = 4 mA, Toe 360 degrees = 20 mA Toe = 149o Shell Fill Level (teal) Feed (red) Inlet Fill Level (blue) Toe = 136o Outlet Fill Level (green) Water Mill Power www.digitalcontrollab.com 3701 NW 40th Terrace, Suite 1 Gainesville, Florida 32606 USA Bearing Pressure

2. MillSlicerToe Position Automatic Control Strategy Feed (red) Toe = 152o Toe = 145o Water (light blue) Mill Power (black) Fill Level Signals: Shell (teal) Inlet (dark blue) Outlet (green) Bearing Pressure Basic Automatic Control Strategy: 1. Empty mill start-up set-point for Toe Angle = 145o. Enter this set point and start auto-feed control. 2. As the mill fills, observe how bearing pressure & power increase over time (see trends). 3A. If power or bearing pressure begin to reach their maximum limits, increase the toe set point. i.e. change toe angle set point from 145oto 147o. This should now reduce the feed and empty the mill. 3B. If power or bearing pressure are significantly below their maximum limits, decrease the toe set point. i.e. change toe angle set point from 145o to 143o. This should now increase the feed and fill the mill. Note: Upon start-up, it is recommended that the operator run the mill in manual control to more quickly bring the mill up to the desired power/pressure operating point and then switch to auto-control.