8 Vehicle guidance setup Autopilot system
Roll / antenna compensation calibration
Note – Antenna offsets are provided when the antenna cannot be placed directly over the working point of
the implement. It is recommended that these offsets are minimized whenever possible.
At the Vehicle Calibration screen, select Roll/Antenna Correction and tap OK. The Autopilot Roll/Antenna
Compensation screen displays.
Precalibration
Before configuring the antenna compensation, make sure that:
l The Autopilot system is completely and correctly set up.
l GPScorrections are set up.
l You read this section carefully.
l If multiple GPS technologies will be used (for example, RTK and SBAS), use the technology with
the highest accuracy when you perform the Roll Correction calibration.
Calibration steps
1. Set the antenna height above the ground.
a. Place the tractor on a flat, level surface.
b. Measure the distance from the ground to the base of the GPS receiver (or antenna).
c. Enter this value for Antenna Height Above Ground.
2. Set the antenna distance from the fixed axle.
a. Place the tractor on a flat, level surface.
b. Measure the distance from the fixed axle to the center of the GPS receiver (or antenna).
c. Enter this value into the Antenna Distance from Fixed Axle entry box. Enter a negative value if the
GPS receiver antenna is to the rear of the fixed axle. The nose of the vehicle is considered
the forward direction.
3.
Configure the roll offset correction.
Use one of the following methods to calculate the roll offset and then enter the roll offset
correction to compensate for it:
ll Tire track offset method
l
Flag offset method
Choose the method which best matches the conditions.
4. Enter the roll offset value for roll offset.
5. Select one of the offline direction options, depending on whether the roll offset distance is to
the right or left.
Version 9.25, Revision B FM-1000 Integrated Display User Guide 181
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