Reciprocating ball reducer

Converts rotation into reciprocating (linear back & forth) motion.

Functioning parameterized design, so you can make it as big as you want.

I designed this as a motion study, and to see how well this would work on a 3d-printer. It works surprisingly well.

It's currently designed to be hand-operated, but easily modifiable to be motor-driven. Motor-driving it is on my short-list.

In the hand-driven configuration, it needs to be held together by hand as you turn it to get the correct motion.

I would be very happy to see your application for this!

The case could use some modifications (e.g. attachment points) depending on your application.

I recommend a Frequency 3, Radius 1 inch, Height 1 inch as a working starting point.

Anything below Frequency 3 will bind. I've tried 1, 2, and 3. If you modelled in some support tracks for Freq 1 or 2, it could work.

Anything below about a 1:1 ratio (radius to amplitude) will bind at frequency 3 (I've gotten a 1:2 at fre