Trimble CFX-750 - Roll Compensation; Pre-calibration; Calibration procedure

Autopilot steering system 4 Vehicle guidance setup
3.
Tap when you have entered the correct offset.
Roll Compensation
Note – Before proceeding with Roll Compensation, complete the Manual Override, Automated
Deadzone, and Steering Gain calibrations.
Tip – Trimble recommends that you use a highly-repeatable GPS correction mode for roll correction. For best
results, use a RTK mode or OmniSTAR® HP signal that has been converged for at least 20 minutes. If you do a roll
calibration with less accurate GPS correction modes, repeat the measurements at least four times to ensure a
more consistent result.
You calibrate Roll Compensation at the Guidance screen with an open field and an established AB
line.
The results of this procedure must then be entered in the Roll Compensation screen. Repeat the
calibration process as often as required to achieve the required accuracy.
Pre-calibration
Note – For best results, complete the following procedure using the Drop Flag Method for roll
compensation.
1. Remove any implement(s) from the vehicle and drive to a flat, smooth area where you can
complete passes of at least 125 m (400 feet) in length.
2. On the display create an open field profile and an active AB line.
3. Run the calibration procedure until the correct response has been achieved.
Calibration procedure
It is recommended that you drop a flag marker from the center of the draw bar hitch for this test to
create a point of origin and reference center line.
1. Drive to the created AB line.
2. Engage on the Line for a short distance. When the vehicle’s direction stabilizes on the AB line
and when the displayed cross track error is below 2 cm (1 inch), stop the vehicle.
3. Mark the vehicle’s position by placing a flag below the center of the drawbar pin hole or
another repeatable reference point.
4. Continue to drive the vehicle down the AB line and at the end of the line, turn the vehicle
around.
5. Re-engage on the AB line, moving in the opposite direction toward the original dropped flag
marker.
6. Stop the vehicle on the same point as the original dropped flag marker.
Version 7.0, Revision A CFX-750 Display User Guide 79