Downward Slope In Turf Encountered - Toro Multi Pro 5800 Service Manual

Downward Slope in Turf Encountered

During sprayer operation with the sonic boom switch in
the automatic position (sonic boom light is illuminated),
the boom mounted sonic boom sensors continually
send impulse signals and then receive echoes as the
signals bounce off the turf. The Toro electronic controller
(TEC) determines the sensor distance from the ground
based on the elapsed time between the sensor signal
generation and the received echo. As long as the sensor
height remains the same as the calibrated height, the
spray boom section will remain at a fixed distance from
the ground for spraying accuracy.
When a spray boom section encounters a downward
slope in the turf, the time necessary for the sensor to re-
ceive the signal echo is longer than the calibrated time-
frame. This change in time causes the TEC to energize
the appropriate solenoid valve coils in the hydraulic
boom lift control manifold. The energized coils provide
hydraulic flow from the gear pump to the barrel end of
the boom lift cylinder causing the cylinder to extend and
the boom section to lower. Once the boom section is
lowered to the calibrated distance, the elapsed time be-
tween the sensor signal generation and the received
echo returns to the correct timeframe, manifold coils are
de--energized and the boom stops lowering. This main-
tains the boom height at the calibrated distance from the
ground.
The boom sensor target distance is initiated during initial
sonic boom calibration and is typically set at twenty (20)
inches. If the boom target distance changes when in au-
tomatic mode, the TEC will energize the appropriate lift
control manifold solenoid coil(s). The energized coils
will lead to a change in boom lift cylinder length and ulti-
mately a change in boom height.
A HIGHER BOOM HEIGHT IS DETECTED SO THE
LIFT CYLINDER EXTENDS TO LOWER BOOM SECTION
SLOPE
Multi Pro 5800
LEFT BOOM SECTION LOWER SHOWN
LEFT CYLINDER
RETRACT TO RAISE
(EXTENDING)
C2
S4
(ENERGIZED)
BOTTOM
COIL
(ENERGIZED)
S2
G
FROM
STEERING
CONTROL
VALVE
Figure 6
Page 7.1 - - 9
RIGHT CYLINDER
RETRACT TO RAISE
C1 C3
S5
TOP BOTTOM
COIL COIL
SH
OR
LC
P T
Figure 5
Ultra Sonic Boom System (Rev. A)
C4
TOP
COIL
S3
TO OIL
FILTER AND
HYDRAULIC
RESERVOIR