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LookAhead
The LookAhead can be activated in the Extended Menu E8.1.5; this is only for EFC
regulation.
There are no adjustments for the system, it can only be activated or disabled.
In section “Extended Menu 8” on page 23, it shows where the LookAhead system is
activated or disabled in the HC5500.
What is the LookAhead?
The LookAhead is a system using the following components:
•
Motor with a pulse generator (pressure regulation valve)
•
Speed input (speed sensor)
•
Boom position (boom sensor)
•
Flow registration (flow sensor)
•
Detection of section status (Spray box)
If the optional pressure sensor is fitted, menu E.8.1.7, the system switches from flow based
sensing when less than 5 Hz to pressure based sensing.
A description of how the pressure regulation valve works is in section Pressure regulation
valve for LookAhead” on page 36.
The LookAhead can predict the correct setting of the pressure regulation valve when the
main ON/OFF function is OFF e.g. on the headland. The pressure regulation valve will
continue to regulate in relationship to the speed and number of active sections.
When the main ON/OFF function is switched ON again e.g. in the crop, the pressure
regulation valve will be very close to the right position for the right flow.
When spraying, the LookAhead logs the valve position every time the correct application
has been maintained for more than 10 seconds.
The logged position is related to the calibrated value and an offset is done if it is not the
same. This could be due to, for example, a different setting on the agitation. LookAhead
learns as it sprays.
When the sprayer is in transport position, the boom sensor deactivates the LookAhead so it
will not function on the road.
Figure 6 shows the LookAhead system compared to the old pressure regulation valve. The
main difference between the two valves is how fast the pressure regulation valve finds the
right flow. The three circles mark where changes are made in the flow.
