Trimble FM-1000 - Page 204

EZ-Steer assisted steering system 8 Vehicle guidance setup
AngleperTurn calibration for EZ-Steer system
Angle per Turn is a course adjustment of the angle that the wheels turn through during one full
rotation of the steering wheel. If the setting is too low, the system may require several attempts to
reach the line.
To calibrate the EZ-Steer system, and set the correct steering performance parameters, complete
the following steps with the vehicle moving forward along the A-B line.
Note – Use the Cross Track Error history plot on the top right of the page and the Average Offline distance to
optimize EZ-Steer performance for each step in the calibration.
1. At the EZ-Steer Steering Calibration screen, select Steering Performance. The EZ-Steer Steering
Performance screen displays.
2. Select the Step 1 tab.
3. With the vehicle moving forward along the A–B line:
a. Nudge the vehicle left or right 1 m (3') from the A–B line.
b. Engage the EZ-Steer system.
4. Adjust the Angle per Turn value so that when the system is engaged, the vehicle moves close to
the guidance line. To make:
ll More aggressive turns, decrease the value for angle per turn
l Less aggressive turns, increase the value for angle per turn
Freeplay Offset calibration for EZ-Steer system
Add a Freeplay Offset if the steering has greater freeplay in one direction than the other, causing it
to drive consistently to one side of the guidance line.
Note – If you are calibrating a 4WD articulated vehicle, you may need to set the Motor Speed setting to Auto
Low.
Note – The Advanced Calibration tab is currently not available. To access these options, select the EZ-Steer
Diagnostics from the main Configuration screen.
1. To adjust the Freeplay Offset settings, at the EZ-Steer Steering Performance screen select the
Step 3 tab.
2.
Engage the system on the A–B line. If the vehicle is offline:
ll To the left, increase the freeplay offset to the right
l To the right, increase the freeplay offset to the left
204 FM-1000 Integrated Display User Guide Version 9.25, Revision B