Friendly Robotics robomow rl350 Operating Manual page 17

1.6 Defining Obstacles-Perimeter Islands
Many obstacles can be left in the lawn without consideration to excluding them using the perimeter wire.
The basic rule of thumb is that the obstacle must be at least 6 inches (15 cm) high from the ground, vertical
to the ground and the obstacle must be relatively rigid. Good examples of these kinds of obstacles include
many trees, phone poles and power poles. When obstacles like this are encountered in the lawn, it is
easiest to allow the Robomow to bump into them, causing the bumper sensor to activate and assist in
navigating around them. If there is a doubt whether to leave a specific obstacle without the perimeter wire
around it or not, the best way to determine is to drive Robomow manually towards the obstacle Obstacle
can be left without the perimeter wire around it, only if the front bumper responds when hitting the obstacle,
from all directions Young, sapling aged trees are not good examples, as they are not very rigid. Other
obstacles that are not rigid and at least 6 inches high (15 cm) 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. Good examples of these types of obstacles are flowerbeds, islands, small trees and low bed
edging.
The Robomow is designed to easily work in the lawn with both types of obstacles, however, for the most
gentle and silent operation, it is preferable to demarcate all fixed objects in and around the working area. If
you are unsure about a particular obstacle, it is best to exclude it with the perimeter wire. It will have no
effect on the efficiency of the mower and can later be removed if not needed.
To create a perimeter island, take the wire from the perimeter section closest to the obstacle and peg it
around the obstacle, using the Roboruler distance around the obstacle, 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 can not be crossed. The gap between the wires shown at figures 1.5 for
illustration purposes only. 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.
Perimeter
wire
Perimeter switch placed at least 3 feet (0.9
m) from perimeter. Wires to perimeter swit
should be placed adjacent and touching, the
same as wires leading to an obstacle.
Direction of
set up
ch
Figure 1.5
Excluding Obstacles With the Perimeter Wire
While the picture shows two
wires separate, they should be
adjacent and no more than 1/8
Flowerbed
inch (3 mm) from one another
Direction of set up
followed around
obstacle
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