The boundary wire generates a magnetic field that tells the robotic lawnmower which areas are to be mowed and which are not. In most cases, the delivery of your robot already includes a basic set of several hundred meters of perimeter wire, including lawn fasteners (nails). But what if these are not sufficient? What should you do if you change your garden layout or it increases in size over the years? In order to ensure your robot continues to function under these conditions, it is necessary to extend or modify the perimeter wire.
Most robotic lawnmowers recognize the lawn area with the help of a perimeter wire. This is laid along the outer perimeter or your lawn, around beds, garden ponds or other areas that the robot shouldn’t drive over. By connecting the wire to the charging station, it creates a magnetic field that the robotic lawnmower detects and turns before crossing any boundaries.
At the same time, the wire helps the robot to find its charging station. When the battery is running low, it travels along the wire to the station.
The perimeter wire is thus very important for the functionality of the robotic lawnmower. If the device does not detect the signal correctly, the robot will leave its area and cause damage to beds and the like. In the worst case, it can become damaged by falling into a garden pond or pool.
Laying the cable is therefore the first task when activating a new lawn robot - and at the same time, the most time-consuming. After that, robot installation is usually quite quick and easy.
You can easily extend the perimeter wire if necessary. For this purpose, there are both butt and click connectors as well as special waterproof wire connectors. The latter ensure that moisture can’t penetrate or compromise a strong connection. Connections with an exposed screw run the risk of rusting. Therefore, in any case, use connections that can be squeezed with combination pliers.
Before getting started, lay out all the necessary tools:
The maximum length of the boundary wire is finite. It can easily be seen in the instruction manual and sometimes differs significantly for robotic lawnmowers for areas for 300 m² or 2,000 m². On the one hand, this results from the fact that the robotic lawnmower can only cope with a certain area. On the other hand, the electrical resistance increases with the length of the boundary wire. This means that at some point, the signal can no longer be transmitted without error and interference can occur.
If the boundary wire is above ground, the extension is quite simple. After testing the functionality, simply attach the additional route with lawn hooks as well.
If the section is to be extended in the case of an underground cable, it is advisable not to bury the new section at first but to test the functionality while the robotic lawnmower is in operation. Adjustments can then be made easier before burying.
Small cracks lead to corrosion: the thatcher damages a cable or it is cut by a spade. There are many causes of damage to the perimeter wire. Most often they go unnoticed until the robotic lawnmower stops working properly.
A broken wire may cause errors in operation, and the search for it often proves tedious, as damage to the wire is not always easy to detect. A very simple method can make your search much easier.
If you do not have a special cable break detector on hand, an old transistor radio is also suitable. Switch the radio to a frequency without a transmitter, i.e. you should only hear a continuous hiss or a frequency tone. Then run the radio with the antenna parallel along the cable. At the point of a possible broken cable, the volume of the sound decreases significantly. The defective area can then easily be repaired using the method described above.
For smooth functionality, it is also important to make sure that the cables are compatible with each other in terms of their properties. The extension of the perimeter wire will be simple and quick, and you will remain permanently flexible in garden design. Only the maximum length of the cable is a limitation of the extension.
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