Husqvarna Automower Solar Hybrid Technical Manual page 19

In order to quickly test an installation, the delay times
for the boundary wire and the guide wires should be
temporarily set to 0 minutes. Automower will not then
make an Irregular search, but will directly start to
search for the boundary wire and guide wires.
The Irregular search method means that the
Automower runs in an irregular pattern until it finds
the F-field some 6 metres from the charging station,
or until the value of the F-signal is higher than 2.
When the Automower is in the F-field, it turns 180°
respective 90° to find the N-signal and the charging
station.
When the mower follows the boundary loop, it drives
a short way into the F-field and fixes its bearing when
the F-value reaches 25 (which corresponds to 4 m
(13 ft) from the charging station, see figure).
Depending on the fixed bearings, the mower either
leaves the boundary loop and starts to orientate itself
towards the charging station, through 90/180 degree
turns, or continues to follow the boundary loop once
more towards the charging station.
When the boundary wire is laid around an island, the
Automower follows the loop around the island about
two turns before leaving the island and continuing to
run until it finds the boundary wire in another location.
Should the Automower hit an obstacle when following
the boundary wire it passes this by making one or
more turns around the obstacle.
1. FUNCTION
Automower fixes its bearings
90°
180°
3012-613
F = 25
3012-614
3012-615
3012-616
English - 19