Husqvarna Automower Solar Hybrid Technical Manual page 16

always available along the entire length of the
boundary wire.
The loop signal's reception and amplification in the
mower can also vary by +/- 10% from one mower to
another. This means that at the same point in an
installation one mower may show A=250 and another
A=275. The charging station's circuit board and the
mower's loop sensor can also show some variation
between different machines.
This means that the Automower will not follow the
boundary wire at the same distance everywhere along
the loop, even if the set corridor width is the same. The
mower will, for example, take a short cut in corners and
not always be able to negotiate passages.
Should the Automower not find the right loop signal
strength when searching for the charging station, it will
look for the strength by running in a saw tooth pattern
along the boundary wire and in this way search the
area closest to the loop. The behaviour is recognised
through the Automower running for a short distance,
stopping, searching, running for a short distance again,
stopping, searching, running for a short distance again,
stopping, searching and so on.
IMPORTANT INFORMATION
The solution to the problem above is to
increase the corridor width for the boundary
wire. The mower then searches for a lower
signal level.
If the Automower does not find the right loop signal
strength when it leaves the charging station to follow
the loop to a remote area, it will start to mow directly
instead.
1.10.2 Guide loop
The guide wire together with the part of the boundary
wire that makes up the return to the charging station
is known as the guide loop. The current in the guide
loop always goes to the left in the connection
between the guide wire and the boundary wire. The
signal from the guide wires are called Guide 1 and
Guide 2 (Guide 2 only applies to 230 ACX and Solar
Hybrid).
The strength of the Guide signal varies like the
A-signal depending on the distance to the guide wire.
Inside the guide loop the signal is positive and its
strength diminishes the further from the cable you
come. Outside the guide loop the signal is negative
and its strength diminishes more rapidly. The area
inside the guide loop is called the guide area.
Automower always follows on the left-hand side of the
guide wire in the direction towards the charging station,
i.e., the mower follows the negative value on the Guide
signal.
16 - English
1. FUNCTION
Saw tooth pattern
3012-606
Guide area
3012-704