Is Marble Machine X Back From The Dead?

[@joonboi84]

I’m hoping that the MMX gets it’s one original music video like its older brother got that helped this journey get started. It MAYBE is not your worthy, but the little bits of music you got to make with it prove that it could’ve made very beautiful music…

[@c0mpu73rguy]

Seconded, I still wish we could hear this beauty sing like its wooden older bro.

[@tommymcnicol9906]

@@c0mpu73rguy thirded, his music is beautiful but his best music is the ones he’s passionate to make yk

[@prime-mate]

Got my vote

[@joschi4148]

same!

[@d3j4v00]

Already thumbs upped as much as one can thumb. Got write another comment in favor of the MMX stand-alone music video.

[@chiraz111]

You have no reason to, but please please trust me on this: You ABSOLUTELY need to use gussets in the corners of your frame to prevent deformation of the structure. Once things start moving the frame will feel a lot of forces in many orientations. TRIANGLES ARE IMPORTANT!

[@ffsireallydontcare]

Triangles are nowhere near as important as cowbells. You can never have too much cowbell.

[@Musikkabinett]

As in: little triangles welded into the corners?

[@sliceofsparta8985]

Since the beginning of Martin's MM3 journey, I've tried to preach structural support, repeatability in the millions and the ability to handle the rigors of the road. It's understandable it's not Martin's top priority at this stage, but this machine needs to be tough, have long-lasting parts and the ability to replace them on the road. Ideas like yours will help a lot!

[@thomasbecker9676]

It's hard to care about things like this, when the cocoon of sycophants doesn't think it's important.

[@ffsireallydontcare]

@@thomasbecker9676 To whomever says cowbell isn't important I say "put em up! put em up!!"

[@huub8]

A safety suggestion: instead of just trying to block your foot from being able to end up under the lever, you could also implement a type of ratcheting mechanism. This would allow you to put force onto the pedal yourself but would stop the flywheel from being able to transfer force to the pedal. I think this would be much safer than the current design, in which it still seems possible to get your foot under the pedal (or something else, either destroying the object or perhaps lifting/harming the flywheel mechanism when that happens).

[@willyouwright]

ratchet will be noisy too?? and need more servicing??

[@Neimit]

Try suggest it on the discord server, I think it has a higher chance to be seen there than in the comments here

[@Volt64bolt]

Similar to what I was gonna say. I was gonna say just make the front part be on a hinge on top so it can freely lift up if anything is underneath.

[@Neimit]

@@Volt64bolt that's what I was thinking too, that would be a pretty good safety feature

[@huub8]

@@Volt64bolt That is indeed easier, but I believe this would still make it possible to pinch things on the upwards motion between the platform to stand on and the lever.

[@-CrySa-]

It's nice that the mmx is getting rebuilt. It might not be good enough for a tour but I would still like to hear it play a full song.

[@doro5751]

We are working on it, so that it can play at least something. How melodic it will be in the end? Let´s see. And maybe it will go on a museum tour somewhen....

[@PatPatych]

Add a one-way hinge down the middle of the pedal. The pedal would be able to fold in half when the force is applied from the bottom (like your foot being underneath) and will stay rigid when the force is applied from the top (you actually pedaling it). Should be simple to do and perfectly safe.

[@andrewmaxwell8181]

This is the way. Blocking the pedal introduces complexity/constraints - what if you need to remove the platform next to it for maintenance? What if you want to change the design? A one-way hinge is more modular because makes it safe regardless of design context or circumstances. It makes it possible to forget about the problem of feet under the pedal, rather than having to remember to solve it with a platform or whatever later.

[@thatguyStrike]

this

[@ElectRocnicOfficial]

Also bear in mind that if the flywheel is really breaking itself free inside this cage, it could turn 90 degrees while still rotating extremly fast and drop to the floor and eventually escape on the floor beneath the machine into the crowd. Please ensure that the wheel cannot escape anywhere in any rotation (and maybe test it that it really does not cut through the machine if it is turning so fast).

[@Neimit]

Try being this up on this discord, higher chance of it being seen ther

[@peterfireflylund]

And if it doesn’t escape but something suddenly brakes it, there’s the problem of conservation of angular momentum (rotational inertia). It might cause the machine to tip… violently. The flywheel has to be weak enough that that is not a concern. The key to a weak flywheel is low friction everywhere else + a smooth energy transfer from the player to the wheel. Cranks are good, pedals not so much unless a smarter transfer mechanism is used.

[@Zeftow]

Actually because of the gyroscopic effect, the wheel wouldn't be able to turn without slowing down first

[@andreasvox8068]

@@Zeftow Before slowing down it would have to get rid of the energy first. I think you can't have enough respect for flywheels. One should also expect shrapnel when the flywheel gets loose

[@CordobesErrante]

He should add 2 loops around the axle as close as possible to the flywheel

[@Dav_Wilson]

Hans is correct love the update! also get better soon! Sending love

[@GeneralDubby]

Yes we agree with Hannes and you David Wilson.. Nice update and have a good recovery Mister Wintergatan! And Greetinx to Hannes too & everyone involved & supportin dis crazy Project !! Seems like it will never end - but hey it's makin music! ..still sometimes I dream of sameway efforts are made on other fields too.

[@jacksonjones6281]

All the videos are a work in progress, and seeing the progress is why we're here. Thank you for sharing today, I love to look forward to these

[@3229dan]

It's really awesome if you were planning to bring this project back, thanks Wintergatan!

[@zactron1997]

Adding to the chorus on safety: because of the massive potential for harm to yourself (and others) if the flywheel mechanism fails uncontrollably, your best bet is to design the mechanism to fail. For example, if you make the belt substantially weaker than any other part on the mechanism, then the most likely failure will just be the flywheel free-spinning until it runs out of energy. Preventing failure is impossible, so your best bet is to ensure that when it fails, you know how, and can keep everyone safe during that failure. Plus, a torn belt is cheaper to replace than steel

[@willyouwright]

points to consider for flywheel speed... NOISE and vibration.. at certain speeds you will get vibration and tones.. Speed does store energy but it also creates more noise and vibration..

[@willyouwright]

also the flywheel can go so fast that air will whistle along it, like a fan.. only need to look at exercise bikes...

[@mortarsquad12]

And friction. Most importantly friction I would say.

[@Xx_drk_mtgbbr_xX]

Small mistake at 7:58 : kinetic energy = 0.5*mass*speed². So speed doesn't increase kinetic energy by 4X, kinetic energy is proportionnal to speed squared. On your example, it works because 4²=4*4, but lets say you increase the speed by 3X, then it is a 9X increase in kinetic energy. Don't know if it is of utmost importance for your design, but still a small mistake. Keep it up !

[@mortarsquad12]

Linearly yes, but circular/centrifugal forces are wack. Still not quite the correct numbers, but closer to Martins

[@Xx_drk_mtgbbr_xX]

@@mortarsquad12 yes indeed

[@riccardoorlando2262]

@@mortarsquad12 Even in rotating systems, like a flywheel, the energy is proportional to the (rotation) speed squared, while being only directly proportional to the moment of inertia. Of course, that's true so long as the axis of rotation doesn't change, but if it does, the machine has bigger problems :D

[@edwardingram5261]

Yeah it doesn't make sense to say that the KE would increase by 4x the increase in speed. For example, if this were true, if you doubled the speed, it would give an 8x increase in KE, and then if you doubled it again you would get another 8x increase, meaning a 64x increase overall. However if you just increase the speed by 4x, that would be a 16x increase in KE. This makes no sense as mathematically you have done the same thing. Square of the speed is correct I think

[@DevinDTV]

yeah i think he just wrote his script wrong and read it off. i bet he actually knew it's squared not *4

[@freman]

You might want to consider some sort of threaded rod in the square tube to drive that movable disk back and forth so you're not relying on friction between two flat surfaces...

[@linkhidalgogato]

i think you should consider putting holes on the flywheels like you said in the video speed matters way more than mass but on top of that where the mass is matters a lot too, all that mass near the center is doing very little for the energy it stores and if its lighter it will be easier to work with and move around which is probably important for a world tour ready machine i would think

[@JBEEUD]

Mass at the perimeter of the disks have a much greater effect than the mass at the center.😉😊

[@gerardvanhardeveld7215]

About your design for the flywheel, there is something you should definitly consider: As you stated at 7:48 the mass has a small effect compared to the outer ring speed. However you can take advantage of both. In simple terms, if you make the flywheen "T" shaped, you will increase the weight at the circumference of the flywheel, decrease the weight in the centre, keeping the same mass without increasing the speed of the flywheel whilst increasing the momentem. This should help enourmous when tuning the flywheel to your momentem needs whilst keeping the material costs down and have a higher standart for safety. YEAH SCIENCE!!!

[@radishhat5736]

Unbalanced flywheels are dangerous- instead of a T it'd have to atleast be an H, - not to mention other issued'

[@babybloc]

Yeah, Higher standards of safety! I was just watching the documentary Desolation Center about an early Survival Research Laboratories performance that included an explosion that resulted in a piece of sheet metal pinwheeling several feet above the audiences heads One of the artists, Mark Pauline, commented, how if they had beheaded someone, it would have changed peoples memories of the performance So please do make safety you’re highest priority. We really don’t want that to be everyone’s association of the marble machine

[@anonymousanon4822]

​@@radishhat5736His suggestion isn't an unbalanced flywheel. It is to make the rim wider than the struts.

[@robwilkes3351]

The important thing to remember is that it doesn't have to work perfectly (particularly with the following you have) and people will just be happy to see it in concert.

[@Thrillbo341]

Thankyou Martin for showing me where to get MMX content, this is the end for us however. I have no doubt you will go silent and give up again, I'm sure you you'll just palm off whatever you make onto some bright and enthusiastic creators. The amount of money, high quality equipment and time you took only to later discard, Well I'm sure it will haunt you without me saying any more. I'm so glad I never got around to buying any of the merch.

[@olivier2553]

I think that for an equivalent mass, you get more kinetic energy id the mass is on the circumference instead of being a full disk.

[@thewhitefalcon8539]

This is true.

[@TenSeventeen]

If your concern is mechanical tempo, consider governors like they had on old steam engines that turned massive flywheels. There are properties in mechanical governors that can be adjusted to have precision tempo

[@Izrun]

Hannes is absolutely right. We love to hear from you no matter what. I think with the quality of content you continually put out you can let yourself do some low effort videos occasionally. As for the design, I'm having trouble seeing how that pedal actually turns the flywheel, but I'm sure it will make sense later. I also wonder what the concept of "tight" is from this device. I guess you mean consistency? Since you already have an arduino setup you could very easily use a break sensor to get your RPMs and do the math for deviation. Heck, you probably could make a really simple one that you would leave on the machine and display to a gauge. Choose your tempo and it would give you a green / too fast / too slow readout you could easily use. Even if you didn't want anything electric on the tour you could use it to practice. I'm sure you already thought of this, but this project just brings out the engineering nerd in me!

[@synthgreen5648]

Martin: "How tight can i get my machine?" Chromeo: "This is the Linn LM-1Drum computer, the hat and the snare can't play at the same time."

[@wmrg1057]

The two problems I see are quick belt replacement and keeping the pieces parallel and / or perpendicular to each other for tensioning and after a "quick" belt change. Even a slight misalignment might cause problems.

[@GraGra3333]

For the foot peddle, you can cut into 2 pieces and create a swivel point on the top of the foot peddle for folding for transport. when down, will work as expected and if foot is underneath, the peddle will bend up and not hurt your foot.

[@thomasrogers8239]

If you're worried about the flywheel getting loose you can have it rotate forwards so that if it escapes it goes into the back of the venue and not towards the audience.

[@andreasvox8068]

Once a loose flywheel hits anything, all bets are off. It can change direction, or tear off other pieces and send those off somewhere else.

[@ciberbri59]

I really admire how you mentally process your failures and difficulties and set your sights anew like the great explorers of old. So happy to hear that all of your previous efforts have found a home where your vision creativity and hard work can continue inspire your fans. I think your prototyping efforts and newfound pragmatism will bear fruit and I will follow your efforts.

[@syriuszb8611]

To make the pedal safe, just make it in two parts, one that would extend from the box, and you interact with is a lever on pivot, supported on outside from the down so it can rotate only upwards. So if you push down with your leg- it's firm, if you pull it up or put something under it, its soft and moves up. I hope I explained it clearly enough. Maybe add some spring to tension it, so it wouldn't flop around when you play, just make the spring weak enough so it would still be soft enough if it would hit something. It would still have some inertia on hit, especially with spring, so it would be best to make it very light. The one way clutch or ratchet would be safer of course, but you probably didn't do it for a reason and you would need to redesign it quite heavily to fit it?

[@riccardoorlando2262]

this is a much better suggestion than a ratchet - completely silent and passive until needed.

[@simongeard4824]

Isn't that exactly what he did with the MMX? A pedal which would just fold upward if something obstructed its descent?

[@slartibartfast2649]

Concentrating the mass of the flywheel nearer to the perimeter would increase moment of inertia for the same mass of flywheel. Spokes or lightening holes could be included in the design to achieve this.

[@JosiGold1]

Small correction, Kinetic energy increases with the square of rotational velocity, not simply 4x. ie increasing the speed by 3x results in a 9x increase in energy.

[@masdichel3410]

I'm so happy that the meetup is in Rüdesheim, I just live an hour away, so bought the tickets and booked the hotel. I'm looking vorward to hear you play and see the Marble Maschines in person.

[@MrConverse]

Hearing from you in a video, even if it’s not as polished as you want, is much better than not hearing from you at all. But living your life the way you want is the most important thing. If you want to post a video each week or most weeks or on whatever schedule you use, that’s fine but don’t let it take over your life.

[@g0etzome]

Have you considered 80/20 aluminum profile? It's a modular system. Welding is great, but adjustability and all the readily available fasteners/components allow for greater flexibility. Packing and moving things becomes easy if you can break things down into many different sizes.

[@mystic95]

We are the music makers and we are the dreamers of dreams.

[@ChristoTracey1]

Wandering by lone sea breakers And sitting by desolate streams

[@MrPete81]

So happy that there's hope in your voice, despite the cold! Hope you feel better soon and have a great weekend :) Can't wait to see how things develop going forwards!

[@graxav]

Sq tubing is perfect for 'machine building' - tried and proved! I like the tabs too - wish I had that in my time!! 👀🤞

[@WilliamAndySmith-Romaq]

I really missed your videos, and I'm glad this popped up! I look forward to seeing where you take MM3. :)

[@sqeegie]

I know designing and engineering is a lot of work. I'm very curious how the other members of Wintergatan are doing and how anxious they are to be making music. I'm stoked for hearing more music from you Martin and Wintergatan as a whole. Will we get an update on the band as a whole?

[@clausmadsen6754]

Oh my, such a smooth Segway to the Trainerds page. Real smooth.

[@craftedbyorre]

Looking pretty fly(wheel)!

[@Daniel_Blake]

Honestly im glad someone is getting the Marble Machine X back up and running. I know people say it is flawed in many ways. But i love that design way more than the marble machine 3. Love how complex it was and how it gets you're engineering mind going. Was very sad seeing it go and kind of why i dropped out and stopped watching a lot of the videos on this channel. Had seen this title and was like "Hell yeah!!".

[@96thelycan]

For the Foot Pedal, add a loose hinge just a bit further up from where your foot will be(so the hinge adequately clears your foot). Have it allow for the pedal part to move upward but stop flat and rests in line properly. So you can push down on the pedal normally, but if your foot or another object gets under the pedal, as the arm pushes down, the hinge will fold upward as the pedal hits them. So it can be strong and not crush any toes. The pedal would just rest on top of your foot as it moves down and back up, before the hinge picks it up again. I think I've seen this on other Pedal powered flywheel designs for different machines but can't really think of a specific f example

[@xiao6826]

I understand your feeling when you saw the work on MMX again, as I now look back on my time spent on my phd...

[@ElectRocnicOfficial]

I would still look for a safer foot guard if I were you. Like in the previous machines where you can step beneath and the foot will simply stop the pedal without being cut off :D

[@jacksonsummerfield4184]

The community believes in dreams and the magic of creativity. I hope they can keep you faithful to your muses.

[@syntaera]

Safety suggestion: Mount sacrificial rollers and pinch-guides around the flywheel so if it breaks its axle, it is contained by parts which are designed to allow its motion to safely damp out, instead of trying to stop it. They should not be in contact with the flywheel during operation, so no extra friction. They don't have to be smooth-running, they don't need bearings, they just need to accommodate the motion until the flywheel stops, just once, before being replaced during the flywheel repair.

[@yocobicus]

The greatest thing I learned is that the older machines were donated. Then the community can do what we are seeing now, engagement! Most creators give up and never give back. I know there has be the ups and downs within the creation of your dream. Allowing to community that wants to see the original(s) functioning. That is a great way to give back.

[@milosperhour_]

Definitely appreciate the update regardless of quality, thanks!

[@TheCebulon]

Awesome news! We always *love* to hear from you. Probably add another tube on top to stop a flywheel if it breaks loose.

[@tobiasbrewin4355]

Kinetic energy of a flywheel is 1/2Jw^2 the where J is the moment of inertia (related to the mass) and w is the angular velocity (how fast it’s spinning) the w^2 means the kinetic energy is proportional to the speed square not speed times 4. (Although by coincidence 4^2 is 16)

[@dakavanagh]

Dealing with tension of belts,chains in robotics and motorcycles, I highly recommend a threaded tension adjuster (probably one, either side of the belt being tensioned). Perhaps, etch some indexing marks either side of the slots as well (for reference).

[@Krmpfpks]

Martin, thanks for the update. Got down with 5 days of fever myself, so I can relate. I wish you a speedy recovery.

[@sevpfl]

I think you vastly overestimate our expectation of quality. This was a good video, thank you.

[@FuryHeartedProductions]

Good luck man, this is still awesome stuff to keep up with.

[@doyowan]

Hope you feel better soon! Thanks for the video

[@lleberghappy]

Flywheels are for good reason thicker on the outside since that mass will generate the most moment of inertia which is what we're after in a flywheel. Meaning the flywheel compared to a solid piece will generate let's say 70% of the moment of inertia with 30% of the weight. Making the machine much lighter.

[@NoNAMECAXAP]

Большое Вам спасибо за Ваш невероятный, по своей огромной мощности, труд. Будьте счастливы и здоровы, Мартин

[@ogiego298]

For the pedal, you should add another guard to the platform to prevent your foot slipping and getting your ankle caught in between the pedal and the platform.

[@matheuspamplona1850]

yes! update!!!! thank you for posting, martin!

[@Wintergatan]

Hey all! Check out the resurrection of the Marble Machine X At Musikkabinett: kzbin.info This is a good starting video From Musikkabinett: kzbin.info/www/bejne/jYatiXaGj5aJqLM Museum Website: www.smmk.de Museum Meetup: wintergatan.community/meetup Museum Discord: discord.com/invite/7m6qF584e3 Check out the Assembly of Hannes 4000 at Trainerds: www.youtube.com/@trainerds This is a good starting video From Trainerds: kzbin.info/www/bejne/o2PZqaCnbpaHa7s

[@PembuatKomentarHandal]

👍

[@thinkatoz1851]

Link not working for me

[@drbulbul]

"Deze pagina is niet beschikbaar." :-(

[@zoomlogo]

👍

[@Blessing_KOREA]

👍

[@dan4653]

For the pedal, just put a hinge in it. When you push down, the hinge is at maximum, and pushes the crank. If the something is under the pedal, the hinge just pivots and can't crush anything.

[@nutsandbolts432]

While you’re getting the square tubes laxer cut, have them etch in gauge lines for the movable flywheel axle that you can use to verify the axles remains square to each other. This will reduce friction and prevent the belt from walking off.

[@jaketus]

7:50 You should make the flywheels as hollow as possible in the center, to maximize the momentum with minimum weight. Optimal flywheel is essentially just the rim turning as fast as possible.

[@Dovenchiko]

For the foot pedal, attach a hinge that folds upward. This hinge works like your elbow where your palm is facing up. If it's at 180 degrees and being pushed down, it forces your shoulder to rotate otherwise your elbow dislocates. If pushed from below, your elbow will bend your elbow so your hand goes up. If applied to this setup, and you accidentally stick your foot underneath, it might give you a nasty bruise if struck but will prevent your foot from being caught under the petal. This also comes with the added feature of possibly being able to fold the petal into the frame making it a square profile. Or you can make a petal that bypasses that issue and is stable when up, and uses a clutch system like a ratchet to only apply force to the flywheel when pushed downward and the only failure case this way would be if you push the pedal down with your other foot underneath it which would be an interesting position if you were facing towards the machine operating it.

[@carlosvilches6206]

Me encanta esta comunidad, me encanta Wintergatan, martín es un genio, y todos ustedes con sus comentarios tan acertados 😁 Marble Machine X me encanta en su totalidad, muchos aportes externos y los mejores fans 🥰

[@markkrick8602]

Just a thought on belt adjustment, an idler is easier but if you insist on moving the whole assembly, etch rulers into the tubing before assembly so each segment may be made square to the rest.

[@phpn99]

Make sure your tensioning mechanism is done using a worm screw, longitudinal to the supporting tubing. This will be both precise and stable. Avoid adjusting the tension using slots and cross bolts.

[@thoaxm6687]

I thought the same thing and was about to comment, then I noticed, there is a tensioning mechanism apart from the slots, best seen at 6:55. Though it looks kinda drafty.

[@davefuelling7955]

The weight vs. speed question for your flywheel is a balancing act that you need to research quite carefully. Speed kills is an expression that you must take seriously. The faster you turn a flywheel the more dangerous it becomes and you must be sure that the structure is strong enough to handle it. Getting an engineer involved is not a bad idea.

[@marshallbrink5227]

He was right- it’s good to hear from you. Hope you’re feeling better soon.

[@CordobesErrante]

you can add a pin in the middle of the pedal and make it 2 parts so if you put your feet under it it doesn't squash it and just pivot in the pin.

[@CordobesErrante]

so it's folds upwards but not downwards

At 8:00, speed doesn't increase kinetic energy 4X. It increases it quadratically. But in your example 4^2 happens to be the same as 4*4.

[@xero256]

I agree with Hannes (my apologies for misspelling his name, probably), it's best to post something. Even a static post. Just keep people in the loop with a status update. It's better than nothing. Hope you are feeling better soon! It's never fun being sick. *totally not creepy fan hug* Sounds like the museum folks have their hands full. It is interesting to see what could have been with the MMX. is it going to be the massive pain in the ass that you described previously? Probably. Could it be coerced into playing a song or two? Maybe. Regardless, it's going to be interesting.

[@trevorms]

If you are worried about safety, you could include a disc brake on the flywheel...this could be the equivalent to an emergency stop button on a machine...just a thought. Good work mate. I've been an engineer for over 30 years, and you are teaching me stuff about design and the design process itself. I hope this marble machine is the one to produce beautiful music for the world...we need it.

[@Tomcroese]

Yes, ti is soooo nice to hear from you, and see you a little!

[@bfg1637]

Get better soon, thanks for the update :). seeing your ideas upfold in fusion is always an inspiration to level up my design skills. Always stoked to see an update regardless of the style.

[@jarduhat8267]

Thank you for sharing Martin! Get well soon!

[@ichbrauchmehrkaffee5785]

7:45 sorry in advance for being nitpicky, BUT: actually kinetic energy increases with the square of the speed, not a factor of 4. It just so happens, that a 4x increase in speed results in a 16x increase in kinetic energy. But a 3x increase in speed would result in a 9x, rather than 12x, increase in kinetic energy. but that doesn't change the fact, that a lightweight flywheel can still deliver more energy by going faster

[@JohnMatthews72]

Thanks for powering through your cold. The video was enjoyable, and it was good to see progress on MM3. Get well soon.

[@JBEEUD]

Keep in mind, for the flywheel, as you increase speed MANY other things change too. Dynamic balancing becomes VERY important and the precision needed in that balancing increases greatly. Air drag on the wheel will increase. Noise from the wheel and the bearings will get louder. You will need to check the bearings' max rated RPM under load. Machining tolerances have to get tighter. And you will need better and larger braking systems to dissipate the increased energy.

[@shanehanson6013]

To tension the belt you need it so all 3 points move together. If the axle is slightly skewed it will also add friction. Also over tightening will add friction you may want to use something like a threaded rod to do the tensioning as it will give you millimeter precision and it could be configured to move all three points in unison.

[@opinion8033]

My friend, this is amazing and make happy. You inspired many many people, including me. my english is not good enough to express my appreciation for doing what you do and keep going. Greetings from Chile.

[@andrewfalenski6583]

Some things that are important are what is the mass of the flywheel and what is the speed of the outside edge of the flywheel.

[@316Minecraft]

I’m sure you won’t see this comment Martin, but just in case, as one of the MMX patrons, I’m super-excited to see that the project is not dead! I’m also very happy about the direction of MM3, and also that you seem calmer and less stressed. Go for it!

[@mckens02]

Your amazing! This is an amazing journey you are taking us on! Loving it x

[@mrtechpat]

Always appreciate videos from you Hope you feel better soon!!!

[@kontrolledkhaos4853]

Imagine that you scaled it down to to being like a foot tall or scaled it up to like the size of a house

[@VWrijder77]

Off course Hannes is right! Any video is better than no video and your "Bad quality" is way better quality than most KZbinrs. Het well soon!

[@benjaminstandfest6265]

Thanks for the update (: Agreed with Hanis that an update is better than perfect video : D

[@PeteJohnson1471]

Hannas 3500, wow he's proper advanced now ;-)

[@scottpeal60]

Consider crating of the modules as you design. How you can stack modules, break them down, crate, move, move through doors and hallways, ship, and reverse. I thought the last two marble machines looked so large and bulkly.

[@TextiX887]

Thank you Martin! Hope you get well soon!

[@jeremygrecte]

Hey Martin, Have you ever heard about Müpro railings? It is like square tubing, but made like a rail to fix stuff on it without the need of any machining or welding, and there is a lot of different pieces available to fix the rails between themselves in any kind of arrangement, still without welding, only with bolts. They are widely used in the industry to make pipes holders or even complex skids (a combination of pipes and accessories). I think they could be used for the frames of your machine (even though your machine don't have pipes) you could fix all the mechanical parts on these rails.

[@Papinak2]

With all the exposed rotating parts, I think that electric clutch to the flywheel with big red STOP button would be good idea.

[@wilkoufert8758]

This format is perfectly fine. Get well soon!

[@Rayphel07]

Suggestion: You could use 30x30 aluminium extrusion to build the frame, that would save you from welding completely!

[@AIM54A]

Remember on those flywheels it's the mass out on the edge that matters way more then the weight near the axis of rotation.

[@blackoak4978]

A couple of things, first: even blocking your foot will not necessarily be safe enough. Someone mentioned a ratcheting system to prevent power from the machine driving the pedal and I agree Second: I've worked with machines that require moving an axle to tension a belt and it's a nightmare to keep aligned after swapping a belt. Not to mention having to loosen and tighten multiple bolts each time. Look into various option to either auto-locate the desired end position for alignment, or try to find a way to consolidate all the adjustable parts down to one part to loosen and tighten the system. I'm thinking either a quick-release, or a sled of some sort that only requires a single point from which to tension it. Maybe have a rotation point, a lockdown point and a tensioning point for the whole flywheel assembly

[@JakeRobb]

When flywheels fail, they most often do so by breaking into jagged metal chunks that fly off radially at incredible speeds. Your square tube cage isn’t going to protect you (nor the rest of MM3) in that scenario. Such failures are common enough in drag racing each competitor must wrap the housing that encases the flywheel (the bellhousing, which itself must also be built to contain a failed clutch) in a kevlar blanket. Cars missing that protection are known as widowmakers, and broken flywheels have taken people’s legs off. I hope you’ll take this into account! At a minimum, add some thick lexan windows inside the tube frame. Better yet, surround the flywheel with thick steel, kevlar, etc. Follow established patterns for making things bulletproof and you should be safe.

[@LReBe7]

@Wintergatan: I think you should really think about making a full enclosure for the fly wheel. I know you'd prefer it to be open and beautiful, but fly wheels really are no joke. For the prototype, you'll probably be able to get away with using perforated sheet steel (like what's inside a microwave door, just thicker) for the final product, some ballistic acrylic is probably the more beautiful solution. Just remember: nothing killed more men, women and children in the workplaces of the industrial revolution than high speed flywheels, belts and drive shafts. Rule of thumb: more energy needs more protection.

[@bow-tiedengineer4453]

This is basically everything I've hoped for! MMX being revived, modules for version 3 that are ready for construction and can easily be repurposed to make the touring version more artistic and interesting as time goes on, while also being easy enough to build that maybe Martin can get it up and running and start composing again. I was beginning to loose faith in the project, starting to think it had lost it's soul, but I think that, with the community pushing MMX onwards, and Martin getting his machine up and ready to compose on, we will hopefully one day get the MMX music videos I've been longing for. Also, meet up in Germany? Perfectly positioned between the approximate completion date of my online German course and my next full semester of college, such that I would not only potentially have the time to go, but also a good enough grasp of the language to enjoy my time in Germany? This is amazing!

[@rostringstudios4095]

You would want to ensure a pretty flat surface for the bearings to sit on, the tubing would be good but you wouldn’t want it to be to uneven, bending the shaft as it goes through the bearings

[@Particulator]

"I miss the smell of metal" coming from the guy who built so much with plywood, hilarious.