John Deere AUTOTRAC OMPFP11320 - Manual (Page 63)

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