Husqvarna Automower 320 Technical Manual page 10

1. FUNCTION
1.5.3 Irregular mowing pattern
The robotic lawnmower mows the lawn in an irregular
pattern. This gives a very even mowing result. In addition,
there are no distinctive tracks left in the lawn, which is
often the case when using a conventional lawn mower.
Spiral cutting
Sometimes the robotic lawnmower can change the
mowing pattern and start to mow in a spiral pattern
instead. This is called spiral cutting. The purpose of spiral
cutting is to quickly get the same length of grass over the
entire working area.
When the robotic lawnmower starts spiral cutting this
means it has perceived the lawn in an area to be longer
and/or thicker than before. The length/thickness of the
lawn in this area does not need to differ that much from
the other areas for the robotic lawnmower to start spiral
cutting. Sometimes the difference is hardly visible.
The robotic lawnmower always attempts to keep the
blade disc at an even speed. Different degrees of power
are used for this depending on the length/thickness of
the grass. The Automower compares the instantaneous
®
power with an average power value from the latest hours
of mowing. This means that, when the robotic lawnmower
enters an area where the lawn is longer/thicker than
before, the instantaneous power will differ from the
average power and the Automower will then start
®
spiral cutting.
The factory setting for Intensity is Medium for the
Automower to begin spiral cutting. Intensity can be set
®
between Low/Mid/High using the Settings - Spiral cutting
menu. It is also possible to entirely shut down the spiral
cutting function in this menu. The Low setting means that
the robotic lawnmower begins spiral cutting less often.
Spiral cutting is only activated in the automatic
operating position, i.e. the Main area mode. Mowing in
the Secondary area mode does not allow the robotic
lawnmower to begin spiral cutting.
English - 8