Leica Geosystems Introduced GradeStar 3D Machine Control System Version 4.2

Leica GeosystemsintroducedGradeStar 3D machine control system Version 4.2, which has been expanded to provide GPS- and TPS-based machine control capability for bulldozers as well as motor graders. GradeStar is designed to work with Leica System 500 GPS receivers or TPS1100 robotic total stations. The operator can select from several GPS or TPS sensors and switch from one to the other in the field. Position data from the GPS or TPS sensor is transmitted via a radio link to the onboard GradeStar computer, where the position, tilt and rotation of the blade are compared with a stored digital terrain model. The computer then calculates deviations in real time to control the machine's hydraulics to move the blade to the desired attitude. The new version of GradeStar is designed to work with the popular SonicMaster grader system and PROControl dozer system, providing an integrated solution for automatic machine control. It can be retrofitted on any of the hundreds of machines already equipped with SonicMaster or PROControl systems. A number of new routines have been added to optimize GradeStar for bulldozer requirements, such as automatic compensation for the dozer's mainfall angle and mast tilt for better accuracy on contoured surfaces and slopes. Other major new features include the incorporation of a Windows 2000 operating system, multiple radio modem configurations and a new intuitive menu for hydraulic tuning. (Leica Geosystems, Atlanta, Ga.)