The Robust joystick from China manufacturer connects a voltage divider to a rotating part, and this system can be applied to a variety of control systems. This is how a traditional steering wheel works, for example, by turning the voltage divider contact arm directly through the steering wheel.

Some Robust joysticks from China manufacturer use a voltage divider corresponding to the Z axis, which is driven by the rotation of the joystick itself. Some joysticks also have a "big top hat" (a tiny controller on top of the joystick that is controlled by the thumb). This small joystick uses the same switch system as the simple joystick described in the previous section.

The traditional Robust joystick from China manufacturer's analog system works well overall, but does have some limitations. In the next section, we'll explore the main drawbacks of analog systems and look at some recent solutions. As light from each LED shines through a slot, a photocell on the other side of the wheel generates a tiny current. When the wheel rotates slightly, the light is blocked, and the photocell produces no current (or very little current).
As the axis of the Robust joystick from China manufacturer spins, it turns the wheel, and the moving slots repeatedly block the light beams that hit the photocells. This allows the photovoltaic cell to generate high-speed current pulses. Based on the number of pulses generated by the photocell, the processor knows how far the joystick has been moved. By comparing pulse patterns from two photocells monitoring the same wheel, the processor can calculate the trajectory of the joystick's movement. Many computer mice employ the same basic system.
Through the above introduction and analysis of the Robust joystick from China manufacturer, hope it helps you.