1.2.3 Defining Obstacles-Perimeter Islands
Obstacles that are relatively rigid and
higher than
15cm (6 inches)
, such as trees, phone
poles and power poles can be left in the lawn without any consideration during the wire setup.
The Robomow will turn when it collides with this type of obstacle.
Other obstacles such as, flowerbeds, fountains and small trees, must be protected from the
Robomow using the perimeter wire. This is done as part of the setup process and is commonly
referred to as a perimeter island. However, for the most gentle and silent operation, it is
preferable to demarcate all fixed objects in the working area.
To create a perimeter island (Figure 1.8):
Take the wire from the perimeter section closest to the obstacle;
Peg it around the obstacle, using the RoboRuler short distance;
Returning back to the same spot of the edge you started from;
The wires leading to the perimeter island and coming back to the edge should be parallel and
touching BUT they cannot be crossed. The wires to and from the perimeter island can be
secured with the same pegs. The mower will not recognize these two wires and mow over
them as if they do not exist. The single wire around the perimeter island will be recognized and
prevent the mower from entering this area.
Areas with obstacles grouped closely together should be covered by a single perimeter island
or if they are close to the edge of the lawn, leave them out of the designated area.
While the picture
shows two wires
separate, they
should be adjacent
same pegs
and placed under the
Perimeter Switch
Perimeter Wire
Min distance of 1m (3ft) between
two adjacent wires of perimeter
islands otherwise demarcate them
together as one perimeter island
Direction of set-up
followed around obstacle
Figure 1.8 -
Perimeter Islands Setup
1.2.4 Slopes
The maximum slope limit Robomow can mow is
18 degrees grade roughly equals to 33cm (1ft) of
rise per meter (3ft). In any event, a slope that
causes the front of the mower to raise from the
ground while climbing is too steep and should not
be included as part of the cutting area.
Max 18 degrees
(33% slope)
1 meter / 3ft
33 cm / 1ft
Max 18 degrees
(33% slope)
1 meter / 3ft
33 cm / 1ft
Figure 1.9 -
Max slope
15
