Circle Rotation Sensor. Measures the angle
of the blade relative to the 130G Grader's
A-frame. When the blade is perpendicular to
the A-frame, 0-degree rotation is achieved.
Tracer Sonic Grade Controller. Mounted at
the top outside edge of the blade, the Tracer
Sonic Grade Controller uses sonic waves or
an R2S-S Laser Receiver to determine the
location and distance to a reference surface.
Once the Tracer Sonic Grade Controller has
been locked onto a reference (e.g., a string
line, a curb and gutter, or a previous pass),
any change in the set point distance causes a
correction signal to be sent to the Remote
R2S-S Laser Receiver. Detects the laser
beam and sends correction signals to the
Remote Interface Box. Corrections are then
sent to raise/lower the grader blade.