What is necessary for the operation of a potentiometer wiper contact?

For the effective operation of a potentiometer wiper contact, a high drive torque is essential. This is because the wiper must maintain consistent contact with the resistive element of the potentiometer, ensuring an accurate and stable output voltage. High drive torque enables the wiper to overcome any mechanical resistance, dirt, or imperfections on the resistive surface, which can affect performance. This ensures that the wiper glides smoothly along the resistive track without skipping or losing contact, which would result in erratic behavior or fluctuations in the output signal.

In contrast, insufficient drive torque—regardless of whether it's low, standard, or medium—could lead to poor contact and unreliable performance. If the torque is too low, the wiper may not press firmly enough against the resistive element, making it prone to bouncing or losing contact altogether. Therefore, high drive torque ensures that the potentiometer operates efficiently and provides accurate readings across its range.