The grader is fitted with a Trimble GCS900 control system. The Trimble GCS900 used with the Universal Total Station is a full 3D control system that puts the site plan – design surfaces, grades and alignments – inside the cab.
The on-board computer uses position information, and compares it to the design elevation to compute cut or fill to grade. This information displays on the Trimble CB460 screen- in plan, profile, cross-section view, or text. The cut/fill data is also used to drive the valves for automatic blade control.