Trimble FM-1000 - Page 175

8 Vehicle guidance setup Autopilot system
Steering angle sensor calibration
Note – Perform the steering sensor calibration only if a rotary potentiometer is installed on the vehicle. If an
AutoSense device is selected as the steering angle sensor, the Steering Sensor screen does not appear.
Steering sensor calibration converts the voltage output of the steering sensor into an equivalent
steering angle measurement.
Note – Complete this calibration before you attempt to calibrate the steering deadzone or roll correction
procedures.
This calibration requires the vehicle to be in motion. Ensure that you:
l Perform this procedure on a hard, level surface that is free of obstructions.
l Maintain a tractor speed above 1.6kph (1mph).
l
Watch the Sensor Angle value:
ll For a symmetrical angle reading at the steering extremes while you manually steer the
wheels to full right and full left
ll To ensure that the angle reading is near zero while you manually steer the wheels straight
ahead
Calibration steps
To run the steering sensor calibration:
1. At the Vehicle Calibration screen, select Manual Override and tap OK. The Autopilot Steering
Sensor Calibration screen displays.
2. Move the tractor forward slowly.
3. Center the steering wheel and then tap Next.
4.
Turn the steering wheel completely to the left and then tap Next. If the steering wheel is not
turned completely to the left or if the steering sensor requires adjustment or replacement, an
error message displays.
The value for Volts updates as you turn the steering wheel:
5. Turn the steering wheel completely to the right and then tap Next. If the steering wheel is not
turned to the full right position or if the steering sensor requires adjustment or replacement,
an error message displays.
6.
At the next screen, center the steering wheel. While the wheel is at the center position, tap Next.
The value for Volts updates as you turn the steering wheel.
7. Tap OK to accept the calibration.
Version 9.25, Revision B FM-1000 Integrated Display User Guide 175