LawnMaster VBRM16 Manuel D'instructions page 18

ASSEMBLY
When the robotic mower detects that there is no grass or encounters an obstacle, it changes route
in a random manner and starts mowing again in a new direction. To allow the robotic mower to
move freely inside the lawn, the lawn must be properly checked and adjusted so that the robotic
mower has enough space for recognizing when there is no grass. Carefully follow instructions
listed as below for types of borders/protections that can/cannot be used for defining the working
area.
Paving
The lawn requires a paved or wooden edge of at least 35 cm wide for it to stop safely and change
direction.
Paving or wooden edge less than 35 cm wide must be widened, or can be used in conjunction with
a barrier. See Raised Barrier section below (Fig. 3).
Raised barrier
With the ultrasonic sensors on, a perimeter barrier at a height above 6 cm can be used to define
the border of the working area.
If an existing barrier is shorter than 6 cm, replace or raise the barrier or add additional paving
(Fig. 4).
Hedging
With the ultrasonic sensors on, hedges can be used to define working area (Fig. 5).
NOTE: Foliage is usually recognized as grass by the robotic mower. Therefore, ultrasonic sensors
must be always kept on when using hedges as the border of the working area.
Fine gravel
If fine gravel or small stones are used to border the lawn, make sure the width of the border is more
than 35 cm wide and has clear edges (Fig. 6).
NOTE: Never use gravel, stones or similar materials with irregular edges for defining the working
area (Fig. 7). Failure to provide clear edges will result in the mower leaving the mowing area and
blade damage.
Physical Bump Barriers
A border that physically obstructs the movement of the mower can also be used. This boundary
could be lower than 6 cm so undetectable by the ultrasonic object sensors, and also narrower than
35 cm. When the robot meets this physical barrier, it will bump off, reverse and turn. This type of
boundary may suit your lawn in some areas.
Temporary Physical Bump Barriers
During first use, while lawn patches are being seeded or with seasonal lawn flowers, it may be
desirable to use a temporary method to protect or define the lawn area for the robot to cut. In this
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