The Prototype is Finished - DAY 10 - Marble Machine Flywheel Prototype
162,269
Published 2023-08-11
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Video edited By Martin and Hannes from the Trainerds YouTube Channel:
youtube.com/c/TRAINERDS
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- Go subscribe to Terrence who is building an AMAZING marble machine, MMt:
youtube.com/@TKMUSIC_
Thanks to Yan and Tom for fantastic work on the Tightinator Software:
github.com/YanFett/Wintergatan_data_analysis
tom.mcnulty.in/
The creators of the software describes it as
"A Website that takes a wav file and outputs a csv file of all peak timings and supports that data with graphs. Its goal is to save time and help in the pursuit of an ever tighter marble machine."
Thank you for helping out with the Marble Machine process.
The prototype is designed to answer the age old question: Can I play tight music using a very strong flywheel? The new flywheel have 20x more moment of inertia compared to the MMX Flywheel.
We are recording at the wonderful location of Siegfrieds Mechanical Music Museum in Rudesheim Am Rhein, Germany. Check out their youtube channel: youtube.com/@Musikkabinett
Edited By the Glorious Hannes Knutsson From the @Trainerds Youtube Channel
Trainerds: youtube.com/@Trainerds
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All Comments (21)
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Wow! That has to be the best flute ever made by human hand! The impeccable playing technique too! That kid has to be a genious to be able to make such a beatifully superiour instrument! (I am definitely not him)
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It seems to me that Martin is testing two different but related things: 1. The machine's ability to keep tempo. 2. Martin's ability to drive the machine.
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If you want to go with the crank, a freewheel mechanism like on bicycles would be nice. That way it won't smack you when you stop cranking. Edit: Actually, you could also use a bicycle derailleur to have gears. That way you could get up to 140bpm or maybe more.
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I can’t believe it. We finally got to hear the MMX play a song.
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A good measurement for judging the friction in the system is the time it takes for the rpm to drop to half the initial speed. When you let it wind down to a stop you get a combination of the effect of running friction and static friction. The 50% time point is only affected by the running friction. That would be a good baseline data point.
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You’re fixing one of the few things that worked so reliably on the MMX, the power source.
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I love seeing Wilson spin as the progress indicator.
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@Wintergatan you could control the output power from the flywheel, with a torque limiter + governor. Then you could be at an exact BPM as long as the flywheel is above a minimum speed (thus you do not need to keep the flywheel at an exact speed)⚙🧑🔧⚙
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Regardless of pedal or crank. I’m thinking the limitation will ultimately be Martins physical endurance. He’s either gonna need to bulk up or employ a motor driven power unit to get through a concert.
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When you mount the fly wheel on the chuck, put your gauge on the rear face to measure the run out and get it level in the chuck. When you machine the front face it will take off the wobble and both faces will be parallel 🙂
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@wintergatan I used to play in marching band and with slow tempos it was always important to subdivide the beat to stay in time better. Maybe two contact mics would help so you get the feedback twice every beat instead of once every beat.
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The community that's born around your work is amazing
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When you single handedly inspire a whole generation to build Marble Machines.
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Don't burn yourself out Martin ! Courage !
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Footpedal + Governor would be an ideal combo - cuts down on fatigue while maintaining the tempo you need. Keep in mind that once you start lifting hundreds of marbles per minute (and various additional mechanical losses), your input power needs will go up... a lot
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Now all you need is to create a governor to keep the speed at the same rotation you wanted. It will help level out the rotation and keep it where you want it, even when pushing the pedal to go faster, with out peaking up past your rotation. Edit; you may want to add a rotation gauge so you can see how many revolution per minute you are going.
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Martin: I need to develop a scientific method to test this hypothesis. Also Martin: I ignore the science, hand crank is more comfortable.
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The pedal's flex might be part of what's making it feel less tight.
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You could maybe add some kind of centrifugal governor to the system to keep a constant speed, similar to steam or sterling engines. It could be made adjustable to hit fixed increments of RPM
