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Tuning tips, tricks, and precautions, Troubleshooting – John Deere AUTOTRAC OMPFP11320 User Manual

Page 63

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GS3 2630 Advanced Settings

CF86321,000027E -19-16MAY11-1/1

CF86321,000027F -19-16MAY11-1/1

Tuning Tips, Tricks, and Precautions

High Speed/Loose Soil Conditions
- Tip 1: The main goal with AutoTrac is to minimize

off-track error. In many conditions the best results are
obtained as the production system is currently tuned
with the default settings.

- Tip 2: It has been demonstrated through testing that

increased Heading Lead when operating at higher
speeds, greater than 11 km/h (7 mph), improves
AutoTrac stability.

- Tip 3: Loose soil has a tendency to decrease the

ability of the machine to steer when necessary,
thereby decreasing performance. To counteract this
issue increase the Line Sensitivity Heading.
Potential tradeoffs associated with increasing Line
Sensitivity Heading are:

1. In some conditions the increased Heading Lead
can lead to higher frequency instabilities.
2. Line Sensitivity Heading is used for line acquisitions
as well as tracking on line. Therefore, increasing Line
Sensitivity Heading can affect line acquisitions.

When using AutoTrac to cross previous rows
- Tip 1: In these circumstances it is common to

experience excessive and repeatable side to side
motion. Increasing Line Sensitivity Heading and
Heading Lead can help reduce the vehicle motion.

- Tip 2: In extreme cases, Differential Lock may be

required in addition to the above tip to achieve
satisfactory performance.

NOTE: When increasing Line Sensitivity Heading and

Heading Lead, Line Sensitivity Tracking may need
to be reduced to prevent excessive wheel motion.

Troubleshooting

Symptom

Problem

Solution

AutoTrac controller unstable when
entering track

Acquire sensitivity too high

Decrease acquire sensitivity

AutoTrac controller takes too long
to enter next track

Acquire sensitivity too low

Increase acquire sensitivity

AutoTrac controller constantly
weaves in the row

StarFire Height or Fore-Aft not
properly set

Enter correct StarFire Height and
Fore-Aft dimension

Line sensitivities incorrect.

Optimize line sensitivities (See
OPTIMIZING AUTOTRAC
UNIVERSAL PERFORMANCE
in Setup section.)

StarFire mount direction in SETUP
different from actual mount direction

Correctly match TCM SETUP mount
direction to actual mount direction

AutoTrac controller did not establish
direction correctly

Drive forward at a speed greater than
1.6 km/h (1 mph) and turn steering
wheel greater than 45 degrees in one
direction

Loose Soil

Add Ballast (Follow recommended
machine specifications)

AutoTrac Controller drives inside
curve

Curve Sensitivity too high

Lower curve sensitivity

45-9

090811

PN=63