Advanced Information
Theory of Operation
Truesight 2 systems use a single Hall Effect crop sensor assembly mounted on the head to sense the
corn rows and return a voltage to the combine (1-4 volt output). If centered in the row, the crop sensor
output voltage should be 2.5 volts; when stalks fully push the right side wand, the voltage should raise
to 4 volts; when stalks fully push the left side wand the voltage should drop to 1 volt. The output voltage
form both the crop sensor and the combine wheel angle sensor are used by the Truesight 2 controller
to determine the direction the combine needs to be steered. The controller communicates the steer
command by sending a voltage to the autosteer valves or steering motor on the combine (factory or
aftermarket). The operator’s primary interface with the Truesight 2 system is through a VT display, used
for setup, calibration, adjusting settings and running the system. The Truesight 2 controller also receives
information from the operator through the various safeties and sensors. Truesight’s safeties can include
the seat switch, GPS speed sensor, and steering wheel motion sensor. The system can be disengaged by:
rotating the steering wheel, pressing the steering wheel button on the VT, raising the feederhouse (auto-
engage mode), or pressing the foot switch. The system can be engaged by: pressing the steering engage
button on the VT display, lowering the feederhouse (auto-engage mode), or pressing the foot switch.
Wheel Angle Sensor
Steering Device:
Autotrak, Ag Leader,
Outback, Trimble, etc
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Advanced Info
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