The joint stays straight when the signal is equal to 0. Positive and negative values bend the constructon in the opposite directions. The gyroscope mounted on a horizontally aligned stick sends 0 to its outputs. The signal value grows as the stick gets closer to any material object. Reaches 0 when the stick touches the ground.
Higher values mean that the stick is pushed into the ground.
Rich or closer energy sources smell 'stronger' than small or distant ones.