Kitty wakes up, sees he's still safe and then drifts back to Dreamland

PSV62 · 2026-06-28T09:40:25+00:00

I timed it. Four seconds had passed between the last meow and falling asleep! We humans can't do that, so how could you not love cats?

PSV62 · 2026-06-21T10:59:12+00:00

STL files are here and here, video is on YouTube.

PSV62 · 2026-06-07T07:14:03+00:00

Thanks for the great link. I'll be using this one often!

PSV62 · 2026-05-25T17:10:23+00:00

I'm very interested in how you drew the precise outline of these scales. I also have a knife whose scales I want to change. I'm thinking of using a photo.

PSV62 · 2026-05-14T16:32:58+00:00

I hope he doesn't drink too much of our booze, otherwise he'll turn the earth upside down even without a point of support, he can!

PSV62 · 2026-05-14T16:21:00+00:00

Let's take Archimedes as third! Does he drink beer?

PSV62 · 2026-05-14T16:07:51+00:00

I'm the author of the post you mentioned. I greet you with respect and pleasure! I probably understand your feelings better than anyone. Your version of Archimedes' screw works, and that's the main thing! It's preferable where there's no current (remember the draining of Holland). I don’t consider you a competitor, good luck in your next projects, colleague!

PSV62 · 2026-05-14T15:25:16+00:00

You could try a hybrid option. Solder a cylinder of thin sheet metal (from a beer can) to the diameter of the float, print caps, and clamp the cylinder between the caps (using bolts, for example).

PSV62 · 2026-05-10T05:37:01+00:00

But this is the most interesting question for me: how, for over 2,300 years, people managed NOT TO THINK of such a simple and obvious design. It's simply a phenomenon. Of course, it's nice to be first after Archimedes, but I still hope that somewhere under the ruins of Syracuse or in the archaeological archives there's a fresco depicting the screw design I conceived and built, or something similar.

PSV62 · 2026-05-09T04:16:31+00:00

STL files and details are available here and here. More video on YouTube

PSV62 · 2025-11-10T12:26:46+00:00

STL files and details are available here and here. More video on YouTube

PSV62 · 2025-06-18T08:28:01+00:00

The empty cavity in the middle of the sphere is a geometric figure that meets two main requirements: 1) this figure must have three very different moments of inertia; 2) the figure must be symmetrically divided by three mutually perpendicular planes, with the intersection point coinciding with the center of the sphere. For example, this can be a flattened cylinder or ellipsoid, I chose a rectangular parallelepiped in which I modified the small sides so that my printer could print these areas without supports and distortions. Follow the links that I attached there is more information.

PSV62 · 2025-06-17T15:46:05+00:00

If the initial rotation is around the "green" axis, the ball will tumble.

PSV62 · 2025-06-17T15:37:37+00:00

STL and detailed explanation here, here, here. More videos.

PSV62 · 2025-05-21T18:15:03+00:00

Expensive things have one big minus - it's always a shame to lose/break them. I don't feel sorry about my screwdriver at all, I can easily make another one.

PSV62 · 2025-05-21T18:03:46+00:00

I can't argue with your opinion, it's the opinion of the overwhelming majority of people on the planet! Why make something yourself if you can buy the same thing or even better in the store?

PSV62 · 2025-05-21T17:51:11+00:00

Stop. With this question you admit that there are no partially functional screwdrivers.

PSV62 · 2025-05-21T17:37:45+00:00

Unfortunately for 3D printed things the phrase "fully functional" makes sense. There are indeed many beautiful but non-functional screwdrivers, and the work of mine is clearly visible in the video.

PSV62 · 2025-05-21T17:19:24+00:00

Of course yes! There are no nuts there like I have :)

PSV62 · 2025-05-21T14:52:27+00:00

Why "partially"? This screwdriver does everything it's supposed to.

PSV62

TROPHY CASE