John Deere OMPFP10808 - Manual (Page 31)

Setup
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Slope compensation aids in helping drive the machine up
a hill to account for implement drift. It looks at the machine
roll angle and slope compensation value to determine the
amount to move the machine up hill. On a 5 degree slope
with a value of 2.54 cm (1.0 in.)/degree this will move the
machine 12.7 cm (5 in.) up the hill to compensate for
the implement drifting down hill. If the implement drifts
more than that, increase the slope compensation value.
If the implement drifts less than that, decrease the slope
compensation value.
Recommendation for use:
• Unless the field is completely flat, the slope
compensation value can aid in keeping the implement
on line.
• 0­2 degrees—Slope compensation may not be needed.
Recommended starting value 1.3 cm (0.5 in.)/degree.
• 2­5 degrees—Slope compensation provides a moderate
amount of machine correction and is recommended to
be turned on. Typical values of 1.3 to 3.8 cm (0.5 to
1.5 in.)/degree.
• 5 degrees and above—Slope compensation is
recommended to be on. Typical values can range from
2 to 7.6 cm (0.8 to 3.0 in.)/degree.
NOTE: Values above 7.6 cm (3 in.)/degree should be
used with caution. On a 10 degree slope with
a value of 7.6 cm (3 in.)/degree, the system will
try to move the machine 76 cm (30 in.) up hill
to compensate for implement drift.
Using the Calibration Feature:
• Machine and Implement should be tracking on line with
iGuide activated. Do not perform the calibration during
line acquisition.
• If the current slope compensation value is more than 1.3
cm (0.5 in.)/degree difference, it may be better to enter
the value manually with the increment and decrement
buttons. If a large change is made, it could cause some
system instability until the system has time to react to
the large changes.
• Calibrations made at roll angles between 2­5 degrees
may not be ideal for larger roll angles and vice versa.
NOTE: You cannot navigate away from the iGuide
screen while calibrating slope compensation. Stop
calibration then navigate to other screens.
Adjusting the value manually:
• When transiting to a hillside and implement error is
showing the implement needs to move down hill, slope
compensation needs to be reduced.
• If the implement error is showing implement needs
to move up hill, slope compensation value should be
increased.
When slope compensation (A) is checked, slope
compensation will be turned on.
Calibrated slope compensation displays the last slope
compensation value created during calibration.
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A—Slope Compensation
On/Off
B—Calibrated Slope
Compensation Button
C—Slope Calibration Help
Button
D—Decrease Slope
Compensation Value
E—Calibrated Slope
Compensation Value
F— Increase Slope
Compensation Value
G—Decrease iGuide Sensitivity
H—iGuide Sensitivity Input
I— Increase iGuide Sensitivity
J— Machine Roll Angle
K—iGuide Status Pie
Slope compensation (E) is an input field allowing for
manual adjustment of the slope compensation value and
shows current compensation value.
Adjusting Slope Compensation Value
Slope Compensation can be changed by three methods:
1. Calibrate slope compensation by pressing (B). Also
see GUIDANCE SETUP for detailed information.
2. Use decrement (D) and increment (F) buttons to
change slope compensation value (E).
3. Manually enter Slope Compensation value (E).
Adjustment for slope compensation using decrement (D)
and increment (F) buttons is 0.01 cm (0.01 in.)/degree.
NOTE: Average slope compensation range is 1.3 to 8.9
cm/degree (0.5 to 3.5 in./degree). If value is higher,
re­calibrate. If value is still too large, turn off slope
calibration. This can typically be seen on flat ground.
NOTE: If upon calibration, slope compensation value
is above 4.00, calibrate again. Re­calibration
is recommended to verify a consistent slope
compensation value. If a consistent value is not
achieved, review the slope compensation guidelines
in the GUIDANCE SETUP section.
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