Most common cause of poor touch function on your plotter

Are you experiencing problems with your touch screen? your plotter? In så case you may have a problem with incorrect grounding?

The power cable usually has three wires Black (-), Red (+) and Gray; or an exposed cable (Ground cable) and the boat lacks an RF grounding point, which is the case in most recreational boats, the ground cable must be connected to the negative terminal of the battery.

The most common error during an installation is that the earth cable is left "hanging" instead of being connected, which can result in limited touch functionality. The reason for this is that the ground cable is there to create a wave with low resistance to provide a return path for noise signals and if this is missing for mras the sensitive touch function.

Below following is a clip from the Axiom manual and the power connection section.

The power cable must be connected to a 12V DC outlet. It can be done by direct connection to a battery or via the electrical central. For boats with 24V, a voltage converter is needed. The product is protected against reverse polarity.

1. Power/NMEA2000 cable connects to back of the display
2. The ground wire connects to an RF ground point. If this is missing, it is connected to the minus pole of the battery (-)
3. Positive (red) cable is connected to the plus pole of the battery (+)
4. Waterproof salt holder with 7A must be installed (not included)
5. Minus cable is connected to the negative pole of the battery (-)