Husqvarna AUTOMOWER 440 Operator's Manual page 5

1.2.5.2 Search method 2 - Follow guide wire
The robotic lawnmower operates irregularly until it
reaches the guide wire. Then the robotic lawnmower
follows the guide wire to the charging station.
The guide wire is a wire that is laid from the charging
station towards, for instance, a remote part of the
working area or through a narrow passage to be then
connected with the boundary loop. See
the guide wire on page 19 .
This search method makes it easier for the robotic
lawnmower to find the charging station beyond many or
large islands, narrow passages or steep slopes.
The benefit of this search method is shorter search
times.
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1.2.5.3 Search method 3 - Follow boundary wire
The robotic lawnmower operates irregularly until it
reaches the boundary loop. Then it follows the boundary
loop to the charging station. The robotic lawnmower
randomly selects to travel clockwise or anticlockwise.
This search method is suitable in an installation with an
open lawn space, wide passages (wider than about 3
m / 10 ft.) and no or only a few small islands.
The benefit of this search method is that there is no
need to install a guide wire.
The disadvantage is that some tracks can be formed in
the lawn alongside the boundary loop. The search time
will also be longer if there are narrow passages or
numerous islands in the installation.
As a rule, this search method is used only if the robotic
lawnmower cannot find the charging station using
search method 1 or 2 within the expected time period.
Installation of
Introduction - 5