|
RCdabbler--
I enjoy reading of your imaginations. May I, please, ask several questions?
Why use a potentiometer (POT) at all? Let the driver be responsible for total control of the steering. If you steer left, then you'd also need to steer right to correct back to center, and vise versa.
How do you intend to orient the steering servo you design? Will you have to change direction of mechanical motion? I like your idea of a jack screw. Have you considered using a bell crank? You could gain some mechanical advantage with the crank, depending on the length of the two arms.
If you're looking for really small machine screws, check at a model railroad shop for the Walthers hex head brass screws and nuts. The hex head could offer several ingenious ways of attaching to a servo output (I use RC airplane fuel line--its flexibility as it turns means the jack screw is less likely to bind). The brass nuts, with some careful soldering, could be fastened to the end of a brass tube. The other end of the tube could be flattened and drilled to accept a link to the steering mechanism. I'm thinking screws of 0-80 thread size.
I hope you can provide some clear and detailed pictures of your effort--even if it doesn't work (though I really hope it does). Documenting your prototype would give us a chance to see what does and does not work, engage our lazy minds, and perhaps offer some helpful suggestions.
Thanks.
chilli
|