Ag Leader GeoSteer Operation Manual - Manual (Page 73)

Auto Calibrate
Operator’s Manual 59
The Angle Sensor calibration should start automatically once the Valve Deadband has been determined. If it does not, press the
Resume button to start the calibration process. The steering axle will make a hard turn to one direction and then back to the
opposite direction to find the maximum Angle Sensor stops. The system will then reposition the Angle Sensor at regularly
spaced increments between the two maximum positions and measure the change of heading at each position. The system will
work from one direction, making increasingly less sharp turns, then continue past the straight ahead position, and then start
making increasing sharp turns in the opposite direction. It will then repeat the process in the opposite direction. Once this is
completed, the calibration process will move on to the next step.
Valve
The Valve calibration measures the rate of turn using the Angle Sensor when a signal command is sent to the Steering Valve.
As the signal to the valve is increased, the rate of turn at the Angle Sensor increases. The GeoSteer Control Unit takes readings
of the Angle Sensor rate of turn at different signal commands so the system knows how fast the vehicle will turn at any signal
command sent to the Steering Valve.
Figure 2-58 Valve Calibration
The Valve calibration should start automatically once the Angle Sensor calibration has finished. If not press the Resume button
to start the calibration process. The first step of this calibration step will be to determine the maximum rate that the steering
axle can be turned using the steering valve. The GeoSteer will command the vehicle to turn the steering axle to one direction at
the maximum signal and then to the opposite direction at the maximum signal. It repeats this two more times.
The GeoSteer will then start turning the steering axle slowly in both directions and measure the speed at which it turns. It will
regularly increase the speed at which it turns the steering axle until it reaches the maximum turning rate it measured at the first
part of this test. At the conclusion of the calibration step, the GeoSteer will be able to know how fast it will turn the steering
axle at any signal strength it sends to the Steering Valve. When this step is complete, the calibration procedure is complete.
Save Calibration
Figure 2-59 Save Calibration