Rise In Turf Encountered - Toro Multi Pro 1200 Service Manual

Rise 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 time between the sensor signal generation
and the received echo. As long as the sensor height re-
mains 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 rise in the turf,
the time necessary for the sensor to receive the signal
echo is shorter than the calibrated timeframe. This
change in time causes the TEC to energize the appropri-
ate electrical relays causing the controlled boom actuat-
or to retract and the boom section to raise. Once the
boom section is raised to the calibrated distance, the
elapsed time between the sensor signal generation and
the received echo returns to the correct timeframe, re-
lays are de--energized and the boom stops raising. This
maintains the boom height at the calibrated distance
from the ground.
Multi Pro 1200/1250
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
electrical relays. The energized relays will lead to a
change in boom actuator length and ultimately a change
in boom height.
A LOWER BOOM HEIGHT IS DETECTED SO THE
BOOM ACTUATOR RETRACTS TO RAISE BOOM SECTION
Figure 5
Page 9.1 - 11
RISE
Ultra Sonic Boom System (Rev. A)