Hardi ISOBUS VT, Operator'S Manual

Page: 67 / 104

7 - Menu 3 Calibration
7.15
Menu 3.6.2 Tractor drawbar
Here the length of the tractor drawbar is entered.
•
The measurement is from the center of the tractor rear axle to the
center of the drawbar pin.
This has to be adjusted every time a new tractor is hooked on to the
sprayer. When hooked up, check the rigidity of the tractor drawbar
mounts. There must be no sideways movement.
Factory setting: 31” (80 cm)
Menu 3.6.3 Dead zone for regulation
This is the non regulation zone when the sprayer is straight behind the
tractor. If the sprayer is oscillating in the hydraulics when driving straight,
this value must be increased.
Factory setting: 4“ (10 cm); Over 8” (20 cm) not recommended.
Menu 3.6.4 Damping of hydraulics
If the system is to aggressive the damping constant must be increased.
Failure to do so may damage the boom.
Factory setting: 50%
Menu 3.6.5 Align right - left
This is to compensate if the front potentiometer is placed offset to the
center line when the sprayer is attached.
Factory setting: 0” (0 cm)
Negative setting will move the sprayer to the left of the track, and
positive setting will move the sprayer to the right of the track. The
sprayer must follow the tractor in a straight line in all situations. If the
value is over 4” (10 cm), it is recommended to manually adjust position
of the front angle sensor.
Too short measurement: The Track reacts faster, but will make the
sprayer steer too large curves.
Too long measurement: The Track reacts slower, but will make the
sprayer steer too short curves.
Decreasing value: Reacting on small deviations. Tendency to
oscillation that will damage the boom.
High precision, but more unstable driving
with small corrections all the time.
Increasing value: No oscillation but tendency to sway. Low
precision, but very steady driving with less
corrections.
No damping (0%): High precision, but very unsteady. Fast
reaction time, but more aggressive
movement that potentially can damage
the boom.
Full damping (100%): Low precision, but very steady. Slow
reaction time, but less aggressive.