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MDU-G4 Auto Calibrate
Manual steering override when using the MDU-
G4 as the actuator is different than using a
hydraulic pressure transducer or override switch.
The GCU detects manual steering override using
feedback from the MDU-G4. In this screen the
bar graph represents the current tested setting
and pressing the – or + will adjust this bar graph.
After adjusting the manual override setting
pressing the start button will turn the steering
wheel to the right and the setting can be tested.
Once the setting is correct, pressing the Save
Limit button will set the saved limit to match the
tested limit.
AUTO CALIBRATE
Auto Calibrate wizard guides user through calibration process
for the active vehicle. Calibration steps teach the system
characteristics of the vehicle and the steps are critical to
achieve optimal control performance. The Auto Calibration
process can be paused and resumed at any point during the
process.
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NOTE!: Auto Calibrate wizard takes a significant
amount of space for your vehicle to operate within.
Depending upon vehicle size, it may take up to 4.0
acres [approximately 300 x 600 ft] (1.6 ha
[approximately 90 x 180 meters]) to complete Auto
Calibrate procedure.
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Vehicle will execute a series of maneuvers during calibration process including turning full left and full right
Auto Calibrate wizard provides specific instructions about required area, speed, and engine RPM during each step of the
process. Calibration steps and time vary according to vehicle type and equipment installed. Follow onscreen instructions
to perform Auto Calibration procedure.
Calibration process can be broken into two areas:
Common Calibration Steps
—These are steps that all vehicles must perform during Auto Calibrate wizard.
Vehicle Type Specific Calibration Steps
—Once Common Calibration Steps have been completed, Auto Calibrate
wizard will go on to different steps depending on which vehicle type has been selected. Calibration routine for Valve /
Steer-by-Wire, and CAN Bus / ISO Controllers are different. Procedures for different types will be discussed later.
To start Auto Calibrate wizard, press Auto Calibrate button from AutoSteer Setup screen. Initial Auto Calibrate screen is
displayed. This screen will be different depending on which vehicle type is being calibrated. Screen will summarize all steps
required to complete calibration and provide an approximate amount of time each step will take.
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All of steps of routine must be completed and changes saved before system is allowed to AutoSteer vehicle.
COMMON CALIBRATION STEPS
All three Auto Calibrate wizard processes will start with same Common Calibration Steps. They are as follows:
Compass Calibration
—Calibrates GCU electronic compass.