Machine Control System, AGL GeoMax EzDig "S" 1D Standard Excavator Guidance System #834407
Machine control receivers work with rotating lasers. The laser provides a reference plane of laser light over the jobsite. The receiver is mounted above the machine's cutting edge on grading equipment or on the dipper arm of excavation equipment. The receiver is initially set on-grade to a known desired elevation or benchmark. As the machine is used and the blade or bucket is moved, the operator is given a visual indication of which direction to move the blade or bucket to get to on-grade, effectively checking grade from the cab.