Robo welder is rotating. Not welding yet but soon.
It amazes me that tiny motor and gear box is all you need.

Here is a movie to prove it.

Just because something you are building is small does not mean it does
not take a lot of time.

I tried the rubber tubing coupler but it did no rotate smoothly.
It would wind up and then would release.
This is a special coupling nut with a 4-40 set screw.

Paul Lamar

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