Husqvarna AUTOMOWER 520 Owner Manual - Page 5

1.2.5.2 Search method 2 - Follow guide wire Follow guide wire means that the robotic lawnmower operates irregularly until it reaches the guide wire. Then the robotic lawnmower follows the guide wire to the charging station. The guide wire is a wire that is laid from the charging station towards, for instance, a remote part of the working area or through a narrow passage. The guide wire is then connected with the boundary loop. See Installation of the guide wire on page 19. This search method makes it easier for the robotic lawnmower to find the charging station despite many or large islands, narrow passages or steep slopes. The benefit of this search method is shorter search times. 1.2.5.3 Search method 3 - Follow boundary wire Follow boundary wire means that the robotic lawnmower operates irregularly until it reaches the boundary loop. Then it follows the boundary loop to the charging station. The robotic lawnmower randomly selects to travel clockwise or anticlockwise. This search method is suitable in an installation with an open lawn space, wide passages (wider than about 3 m /10 ft.), and no or only a few small islands. The benefit of this search method is that there is no need to install a guide wire. The disadvantage is that some tracks can be formed alongside the boundary loop. The search time will also be longer if there are narrow passages or numerous islands in the installation. As a rule, this search method is used only if the robotic lawnmower cannot find the charging station using search method 1 or 2 within the expected time period. 362 - 002 - 06.02.2018 Introduction - 5