Rotary on not round or cylindrical items

[misken (Melvin)]

I did a similar thing with a turn table, just for fun. The only thing you would need to change is the orientation of that axis. I have a short demonstration here:

DIY laser turn table

It was a small project, just how to test how it can be done. I have no use for it (yet). I just wanted to see if you can misuse the z-axis for this use case, and it works fine. I think that’s already done like this in other laser types, but I didn’t see it for a diode laser yet. Of course, for real usage, you need to add automatic loading and unloading of the table. Here is the video: [Simple turn table for diode lasers] And here is some rough description:

There is also a link to a more elaborate description. So you could design it to have the rotary as z-axis and do 90° turns every step.
But you can’t change the design per side using this method, it would repeat the same design on each side.