Hardi HC6500

3 - Description
3.2
HARDI® LookAhead
With LookAhead, the pressure regulation valve can predict the correct setting before the main switch goes to ON. It also
improves application precision when re-starting after a tank fill.
LookAhead helps farmers who have tractors with semiautomatic gearbox, meaning the “hardimatic” function does not work
due to constant PTO revs.
The LookAhead system has 3 main advantages:
1. To improve regulation response time when sections are shut OFF or opened.
2. To improve regulation response time when the spraying speed changes during headland turns.
3. To stabilize regulation during pressure/flow fluctuations in the period immediately after main ON/OFF function is
turned ON.
The LookAhead feature is active when the boom is unfolded and the LookAhead menu is activated and calibrated.
When the power is switched to ON, note the regulation valve will adjust from the actual setting to the minimum setting and
then back again to determine its actual position.
For LookAhead to function correctly, the controller must know which nozzles and application rate will be used. This is
selected from a number of nozzle choices stored in memory. At start up of the controller, it will prompt user for a choice
between using nozzles from last spray job or selecting a new nozzle to be used.
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ATTENTION! The tractor gearbox must be an automatic or semi-automatic type with constant revolutions P.T.O. or
the tractor must be driven with constant R.P.M. for the LookAhead to work properly.
Pressure based regulation (optional equipment)
To improve the non-equal EFC (Electric Fluid Control) system, an optional sensor can be mounted to switch from flow to
pressure based regulation. When active, the system automatically switches to pressure based regulation when the flow
drops below the minimum flow rate for the flowmeter.
The drop of flow can be due to number of sections selected for the boom and number of nozzles in each section. If there
are few or only one nozzle in the outer section of the boom while spraying in an angle with only the outer section open,
there is almost no flow in the liquid system, resulting it to shut down.
The same will happen if the sprayer is fitted with a large flow housing. The flowmeter will stop rotating and measure no flow
with small boom sections or nozzles with low output.