Topcon 1004089-01 - Chapter 6 - Troubleshooting Guide; Excessive wheel motion; Aggressive snaking motion

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Troubleshooting Guide
Chapter 6 –
Symptom
Causes
Solutions
Excessive wheel
motion.
Overall steering
performance is
acceptable, but the
operator is concerned
about how quickly the
wheels are twitching
back and forth.
AES-25 Deadband
Adjustment set too high.
Reduce AES-25
Deadband Adjustment.
AES-25 Sensitivity
Adjustment set too high.
Reduce AES-25
Sensitivity Adjustment
(only if no WAS fitted).
pTime setting too low.
Increase pTime setting.
Incorrect vehicle profile
being used.
Load correct vehicle
profile.
Incorrect vehicle type
being used, example:
swather set-up using
harvester vehicle type.
Load correct vehicle
type.
Worn or loose steering
components.
Inspect steering system
for worn or loose
steering components,
replace or repair.
GPS receiver has a loose
fitting or is fitted
incorrectly.
Check receiver mounting
is secure and correctly
fitted.
Aggressive snaking
motion.
The vehicle appears to
be continually moving
back and forth when
looking over the front
nose of the vehicle.
Although a lot of
motion is observed, the
cross track error
displayed is relatively
small.
Online Aggressiveness
setting too high.
Reduce Online
Aggressiveness setting.
pTime too low.
Increase pTime setting.
Compass calibration
corrupted.
Re-calibrate compass.
Vehicle geometry GPS
receiver to center axle
incorrect.
Check measurements of
vehicle geometry are
correct.
GPS receiver has a loose
fitting or is fitted
incorrectly.
Check receiver mounting
is secure and correctly
fitted.