Ag Leader GeoSteer Operation Manual - Manual (Page 78)

Auto Calibrate
64 GeoSteer System
Note: Before the calibration process was started, the Antenna Lateral Offset value should be as close to 0 as possible. If the
value is off by more than 4.0 inches (10.2 cm), the calibration process will have to be redone after changing this value.
1. Set an AB line, engage the AutoSteering, and let the vehicle AutoSteer for at least 100.0 feet (30.5 m).
2. Stop the vehicle, place it in park, and disengage the GeoSteer system.
3. Use a plumb bob to place a flag in the ground directly beneath the center of the draw bar.
4. Return to the vehicle, start the GeoSteer system, and engage the AutoSteer for at least another 100.0 feet (30.5 m) on the
same AB line.
5. Disengage the AutoSteer, turn the vehicle around, and AutoSteering back down the same AB line in the opposite
direction.
6. When the vehicle's draw bar reaches the flag stop the vehicle, place it in park, disengage off the GeoSteer system, and exit
the vehicle.
7. Check to see if the center of the draw bar is over the flag.
8. If the flag is exactly beneath the center of the draw bar, no adjustment is needed.
9. If not, use a plumb bob to mark the spot directly beneath the draw bar, and then measure the distance between that spot
and the flag.
10. Calculate the Offset Error by dividing the measured distance by 2. (The measurement is divided by two because taking the
measurements driving in opposite directions doubles any error.)
11. From the AutoSteer Setup Vehicle screen, go to the Manage Vehicle > Edit >Antenna Lateral Offset screen (see
Antenna Lateral Offset on Page 33). Adjust the existing value by adding or subtracting the Offset Error.
Figure 2-67 Edit Vehicle Adjust Lateral Offset
Note: This measurement may require that the Left or Right button may have to be changed.
12. Repeat the procedure to ensure that the lateral offset is now correct using a new A/B line for both directions.
Example:
After AutoSteering up and down the AB line, the center of the draw bar is 3.0 inches (7.6 cm) to the right of the flag. Divide
the measurement by 2, which gives an adjustment of 1.5 inches (3.8 cm). Go to the Edit Antenna Lateral Offset screen and
adjust the lateral offset 1.5 inches (3.8 cm) inches to the right (the adjustment must be made in the same direction of the error).
Note: if the adjustment is more than 4.0 inches (5.2 cm), the vehicle will have to be recalibrated.