Still going to update one more part but here is what my design looks like so far:
Base-Added lower base to hide electronics.
SC-Maik, I laughed when I saw your design as i had recently finished mine and the similarity was close!
In my design, the head of the USB cable is fully within the base
The upper base screws into the lower base. The lower base has the option to attach to the desk.
-A hole in the middle of the upper base for wires to go through.
-Redesign of Uprights to accommodate ball bearings. These will change as I am redesigning for cheaper Skateboard bearings.
-Redesign of spring retention to remove need for screws. (SC-Maik has furthered this design with the ability to accommodate many spring diameters)
Arms-The spring is moved to the other side of the arm. This allows a more compact design overall.
-The angle of the spring to the arm is changed.
The original design, when built, required the user to press the handle down while plugging in to get a decent center on the Z axis.
This change in angle sets the handle in the middle of the Z axis with the springs at rest.
-On the spring side, adjusted shaft diameter to fit in bearing (again, will be adjusted for new bearings)
-On the Pot side, the shaft of the pot is still used but a bearing slides over the shaft. The forces of use are transferred to the bearing via the Pot shaft.
Instead of a shaft sticking out of the arm, the Pot shaft extends into the arm itself as seen below:
To Do:-Redesign for Skateboard bearings (much cheaper)
-One thing I am wanting to do but haven't figured out how: The spring angle is not always exact (manufacturing tolerances and whatnot)
I am trying to think of a way to minutely adjust the springs angle relative to the base as a way to calibrate the Delta Throttle to your specific springs.
In example, my current build shown in this post has a center that gives me slight forward thrust when I am not touching the throttle.