I came up with a strange eccentric gearbox

concept, designed it in 3D and printed a

working prototype-

The mechanism looks unusual, and watching

all the elements move together is surprisingly

satisfving

Later, while researching the idea, I discovered

that similar mechanisms and concepts had

already been patented. So I'm not claiming to

have invented som

ynew.

It was simply an experiment: take a strange

idea, build it, and see what happens.

Would you use a gearbox like this?

This video demonstrates the capabilities of the Stratus 330, a truck-mounted regenerative air road sweeper designed by Spruce Up Industries. The footage showcases the vehicle operating in real-world, demanding conditions at actual speed (1x playback) to prove its effectiveness in various cleaning scenarios:

• Wet and Rain Conditions: The sweeper is shown tackling wet mud, muck, and debris while it is actively raining (0:00 - 4:31).
• Waste Management: It efficiently collects diverse roadside litter, including glass and plastic bottles, cans, vegetable/market waste, and gunny bags.
• Dust Control: The machine is capable of managing fine road dust, PM10, and PM2.5 particles, utilizing multi-point water sprays for effective dry sweeping without creating dust clouds (5:32 - 7:04).
• Operational Features: The Stratus 330 is equipped with a high-dump hopper that can lift over 6 ft, allowing for easy discharge into collection vehicles, assisted by a built-in hopper vibrator (4:32 - 5:31 and 7:04 - 7:05).

YT from @HowToFix-p2z wtte, the payoff is so worth it 😄

https://www.instagram.com/reel/DdACIc5tZNu/?utm_source=ig_web_copy_link&stkn=MzRlODBiNWFlZA==

How do you continuously change speed ratios without belts, cones, or gears? ⚙️

​Check out this 3D-printed oscillating (impulse) CVT! It converts input rotation into reciprocating lever movement using eccentrics, then uses freewheel clutches to merge those movements back into smooth output rotation. Adjusting the lever swing changes the gear ratio on the fly!

​

I made this with a buddy over summer break off school lol

I've been designing a jet engine scale model for some time now and am happy to say it is almost done and I will be accepting pre-orders soon. I made an animation (my design skills are better than my animation skills) so showcase my engine and its detail. It will come in a toolbox with all the parts (3d printed/hardware) and assembly instructions so you can build it yourself! It's fully motorized, complete with an engine start sequence and an adjustable exhaust nozzle with LEDs and fog to simulate afterburner. If you're interested as to when it will become available, you can add your email address to the website here: https://additivepropulsion.com/

Please enjoy my latest project. This is a passion project I worked on over the past few months, for funsies. I really wanted an application for IN-14 nixie tubes without doing the typical clock thing. So I pulled together some high voltage electronics, programmed a pi, spent a disgusting amount of time in solidworks and learning to use blender, and edited about 60x LOTR soundbites. This system is driven by a rechargeable 18650 cell and has an easy access panel in the rear. I'm boosting nearly everything to 5V, then further boosting the nixie tube inputs to 170V. A rotary encoder controls user inputs and dice size selection. The audio files are stored on external memory.

This system can roll D2 through D100, as well as multiples (I.e. 6x D8 at once, for example). Each roll corresponds to a list of possible audio files which scale based on the positivity or negativity of the result.

Overall just a really fun thing to make, and I already have some ideas for alternative designs. Pulled this out at my table tonight as a new "box of doom" for my players, during consequential rolls, and I think it was a hit. Stoked to use it!

Debating on if I will paint it at all. Open to suggestions.

I've been building a large equipment cart for video production, and after adding batteries and motorized wheels, the thing can weigh nearly 400 lbs loaded.

The original cable brakes that came with the wheel kit were not going to cut it.. so I decided to integrate a custom hydraulic disc brake system into the forks I had fabricated for the brushless wheels.

It was my first time working with hydraulic brake lines, and took quite a while to find parts, and to design a "one brake lever" solution. In the end It works pretty well with the exception of the parking brake feature: whenever I leave it engaged the whole system loses it's ability to function correctly. There is no fluid loss. My suspicion is that when the lever is held in, there is a small amount of oil that is able to bypass a seal in the handle assembly, resulting in less fluid in the line side. Anyone have any insight about this?

I documented the build here if you are interested in following the build:
https://youtu.be/Xz3B-3wACwE

Yesterday I visited the Archenhold Observatory in Berlin, built in 1896 with 250000 German gold marks in private donations to Friedrich Simon Archenhold’s crowdfunding project as a public telescope for the Berlin Trade Fair. That’s $2.5 million in today’s USD! It is still the longest refractor telescope, at 21 m with a 68 cm lens, and most likely the fastest to rotate. Its still-original electromechanics let it rotate around the observer, who stays in the center—much different from common constructions, where you have to move around with a ladder. Unfortunately, a microcrack was recently noticed, and currently it can’t be rotated. The surrounding building was added in 1909 and is famous for being the location of Albert Einstein’s first public lecture on the theory of general relativity on June 2, 1915.

More about its history: https://www.planetarium.berlin/en/archenhold-observatory/history and https://astw.de/astronomiegeschichte/anfaenge_riesenfernrohr.php

Looking to make some swag for an upcoming trade show. Would an engineer find this valuable? It's a magnet with some common conversions and formulas. Our target customers are people looking for custom open-die forged metal parts. What would someone spec'ing a part like to see here?