Is Gravity Really Constant? I Built this machine to find out.

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Video edited By Martin and Hannes from the Trainerds YouTube Channel:

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- Yes, yes it is.

This tool has really been such a help in my process to find a way to accurately rotate a shaft using mechanics only.

The Tightinator is measuring the tightness of transients by measuring the standard deviation of a set number of consecutive transients. When we are looking at the "Best 300" its the tightest 300 consecutive transients of an audio recording we are measuring.

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[craftedbyorre]

Martin is becoming a 17th century physicist, and I’m all here for it.

[jcagle]

Martin - "No more scope creep"
Also Martin- "Let's reprove science"

[antoineboillet]

Hi Martin, here are my 2 cents from a Mechanical engineer's point of view. Don't forget that your driving mechanism will not only have to be tight in a constant load condition (ex: a tuned watch, or air fan at equilibrium), but will also have to play tight with highly variable load as the marble machine plays. If you are not controlling the speed and power input by direct human power, you will need a very reactive control system to maintain constant speed under variable load especially if this system is not compatible with high moment of inertia. You don't want it to end up with more variation than with a high moment of inertia human-driven system.

[AsbjornOlling]

Martin: I need to simplify and reduce scope, so I can have a marble machine that actually works.
Also martin: let me design a mechanical instrument to check if gravity works.

[lesalmin]

What you have built, is basically an old time weight driven wall clock, so it's not a big surprise it's tight as a clock. 😃

[dalegray]

Fast forward 10 years and Martin is experimenting with atomic clocks to create the ultimate tight music!

[evanramee]

I would love to see you use bike drive chain components, like cassettes and derailleurs, to change tempos. They're readily available with a wide range of gear ratios.

[DoodleChaos]

Anybody else chuckle when they read the title? I love Martin's contraptions

[litterbox]

can't wait for the one where he truly builds a marble machine from scratch, by first reinventing the universe

[fijnman]

7:00 Martin casually making a graph in CAD as an easy solution just explains a lot haha

[StuffandThings_]

The story of the Marble Machine reminds me a *lot* of the story of the Marine Chronometer. John Harrison spent over 30 years working on his designs, along with many unsatisfactory prototypes, and many others improved upon his work later to achieve even better results. Don't give up!

[mattcy]

Oh no now his music wont be tight because of gravitational waves.

[hsfinlayson]

While I absolutely find enjoyment in this ongoing series — and have for the past few years — I must profess that I am curious as to the reasoning for recently obsessing so much on milisecond-level "tightness" of the system. Some of the best music we've all ever enjoyed was made before click tracks were used in the studio. Many of our favorite rock & top-40 hits from the '60s, '70s, and '80s have tempos that fluctuate all throughout... or ramp-up across the length of the tune... and nobody cared(cares). If your next version of the Marble Machine has tempo fluctuations, who cares...? The live musicians can adapt. Unless you plan on sync'ing to backing tracks, it seems like overkill - I presume I am missing something... (?)

[XIIchiron]

The mechanism you built is almost identical to a lot of really old clock towers, so you're in great company in terms of realizing that gravity can be used for precise timing

[americanbaldguy]

I think Martin is trying to build a clock that can play music!

[metern]

You really need to install a Governor. It is a reason they use it on a machine with a heavy flywheel. It really helps to keep a steady speed. 😉

[NorbertFuto]

When perfection takes over, I understand the concept you are chasing and why, I just hope you will be able to enjoy and appreciate The just enough

[CelticKnight]

The fact that its that close… and theres no compensation for friction is absolutely amazing…

[LightProgRock]

If you want to change the tempo analogically (not just 100bpm to 120bpm), you can use the mechanism for the motor speed on old vibraphones ! The belt is on a conical shaft and a command moves the belt on the small or big diameter for tempo changes.
My vibraphonette has that, works like a charm, even though you have to ensure perfect friction

[blackssalad]

Martin, please, use two separate power inputs in the machine, one for the programing wheel/info of the machine, and another one for the marble lifting, you will get way better results