1. D rives & C ontrols S ervices, Inc. Quality Mining Services AccuWeigh Production Monitoring System ™

2. D rives & C ontrols S ervices, Inc. Electrical Troubleshooting Electrical Tuneups & Audits Static Motor Field Exciters Static Generator Field Exciters Excavator Startups PLC Modifications Boom Tightline Systems Excavator Data Acquisition Systems Dragline/Shovel Payload Systems

3. Offices USA Tyler, Texas Bogata, Texas Heath, Texas Henderson, Texas Jasper, Alabama Montgomery, West Virginia Tornado, West Virginia Casper, Wyoming Gillette Wyoming Dubois, Wyoming Edmonton, Alberta, CAN Emerald, Queensland, QLD Mackay, Queensland, QLD

4. AccuWeigh ™ Introduction Real-time Access to Information –Increase Productivity –Reduce Maintenance –Prevent Overloads

5. PLC Based Integrated directly with machine control system… NO BLACK BOXES No proprietary equipment “Off-the-Shelf” hardware –Industrial durability –High Availability –Low Maintenance Training –Simplified Troubleshooting

6. A-B PLC (PLC5)

7. A-B PLC (SLC500)

8. Unprecedented Accuracy 20 parameters are measured and stored on a cycle or truck basis Sampled at 20-50 times a second Error correction –Tightline –Acceleration –Motor field variation –Loop Unbalance Highly accurate position resolvers are more accurate and durable than older encoder technology

9. Position Resolver

10. Flexible Operator Interface Any PLC interface terminal AccuWeigh™ standard panel –PC touch screen using RSView –12 Inch VGA –Readable in direct sunlight

11. Easy Access to Information Data is collected and stored in a non- proprietary database –Retrieved manually from machine –Optional- telemetry to mine office “Data Packet” provided to mine dispatch systems

12. Sample Block Diagram

13. How It Works Cycle Detection Payload Weighing Write To Database

14. Cycle Detection Bucket Dump Dig Detection Hoist Position Hoist or Drag Torque is High Swinging to Dump Swing Speed (shovel) Hoist Speed (dragline) Weigh Load Bucket Dump Swing Back to Cut Bucket in Dump Zone or Dipper Trip

15. DRAG/CROWD POS. Payload Weighing HOIST POSITION DRAG/CROWD POSITION HOIST MOTOR AMPS MOTOR FIELD HOIST ROPE PULL LOTS OF TRIGONOMETRY WEIGHT ON ROPE VERTICAL COMPONENT WITH DRAG/CROWD INFLUENCE DRAG/CROWD POSITION COMPENSATION HOIST VELOCITY ACCELERATION COMPENSATION DRIVETRAIN EFFICIENCY CORRECTION SUBTRACT THE EMPTY BUCKET WEIGHT SCALED WEIGHT IN POUNDS

16. Write To Database Bucket Dumped Signal from PLC Read Data Parameters from PLC to PC Write Data to Database Transmit Data via Telemetry AccuWeigh Database Truck Loaded Signal from Dispatch Write Data from PLC to Dispatch Transmit Data via Dispatch Telemetry Dispatch Database

17. Increased Productivity Spot performance trends with excavators and operators –Operator Performance –Excavator Performance –Excavator Faults Operators receive immediate feedback from operator interface system Timely feedback for operators and management is essential to increasing performance and productivity

18. Powerful Reporting Tools Web Based Reporting –Viewable from a standard web browser –Can be exported to Excel –E-mail reports on a schedule –Quick-pick, one-touch reports –Custom configuration of reports Site specific reports available

19. Downtime Detection AccuWeigh system detects downtime and prompts operator for a reason –Productive, Down, and Delay time is accounted for and reported in AccuWeigh Database

20. Alarm and Trip Reporting Optional alarm and trip database Tracks time and duration of specific alarms from PLC Allows tracking of faults and identifies maintenance problems and trends Allows faults to automatically enter down codes into machine chronology report

21. Blasting Effectiveness Tracking bucket fill energy, bucket fill time, and load weight –Allows dig index creation energy/ton that can be tracked by time or machine location –Evaluate blasting patterns and practices

22. Unparalleled Support 24 hours - 7 days a week worldwide Telemetry allows upgrades and improvements to be installed remotely Not limited to AccuWeigh –PLC troubleshooting –Remote X-Y for regulator performance

23. Thank You D rives & C ontrols S ervices, Inc. Quality Mining Services