How I´ll Make the Worlds Largest Plywood Gears

Well gubbe… I think they machine double heicoil gears separately. That is, in two halves.
Assuming, you want sharp v on the middle of the gear.
If you want the gear cnc machined in one piece, you will get a rounded V corner on the middle.
And, I don’t know how it will work as a smooth torque transformer.
At least, I think the profile of the gear is not the same if the angle of the gear transitions from, say, plus 25 to minus 25 degrees in a curve.
Or, you could leave a gap between gear lines. That would also help cleaning the gears v bottom

you could make the gears in 3 layers: fist and third being a gear blank with the second being the spokes, to make the gear teeth you would tilt the bandsaw table and drill press table to the same angle as the tooth angle, then cut the gears like normal but on a tilt, the second layer could be expanded into slots designed into the first and third layers to give more stability

Martin, I don't know if it would be too far, but you might reach out to @NerdForge because I believe they have a flatbed CNC machine in Norway.

I love that you turn more and more into a musical engineer.

he's surrounded by smart people and he's clearly smart too so I'm baffled as to why he would use AI for research 😐

Soneone is a Fallout Fan nice

Maybe you should stain each gear with a different colour before sealing. I think that would look so cool.

<3

Yea bro thats why you want to work on this but not why you should

<3

I am a CNC machinist, I follow DNG Mori but I HAVEN'T seen that video. Proves your point

My grandkids will be born before this project is completed.. and my daughter is still only 13. 😉😂

The only thing that worked: change it

Wood has high friction, high slop and high compression. Ignoring humidity deformations, ply is the keyword in plywood. It doesn't just mean "layers", it also means "pliable".

I would suggest adding Nylon/Teflon tooth faces, secured with slip-in "keyed", metal backplates. Wood rings, metal tooth-mounts, nylon contacts. The distributed pressure should limit nylon wear. The metal plates should stop deforming and reduce slop. The wood, with a sheet metal core ply, will have little humidity expansion. Keep the wood part cosmetic.

Perhaps you should look at "clockwork mechanics", which is really what you are reinventing here. The wheels already exist.

One big suggestion I feel that I must be said. You can use a "magnet break", which uses aluminum or copper as the "breaking pad", which has no contact friction, in your timing devices. The faster a plate of diamagnetic metal passes through a magnetic field, the more it resists moving through that field. For instance, your spinning regulation pendulum uses a physical contact to reduce the speed. That friction will never be controllable. If the balls were copper, which passed through an adjustable magnetic field as they extend, it would "break" the spinning, the faster it tried to spin. The magnetic field would be reflected back at the metal, creating a N-N repelling or a S-S repelling. However, spinning slow, away from the magnets, the slowing would not happen.

This can also be applied to the flywheel, by adding an aluminum "tab", which protrudes off the flywheel and passes through an adjustable magnetic field. That acts like a similar break, with more precise tuning.

Instead of bike pedaling... Make a weight equal to your weight and a 1:1 platform drop. Just step onto the higher platform, once every few minutes and slowly "fall down", to lift a second weight. Two weights so one is always falling while the other one is being "reset".

Attached to a "spring board", you could just bop around to the beat, hopping up and down, harvesting every impact while a soft "spring" returns the platform to the higher position on the rebound.

Just so you know... A 150 lb object can create 300 lbs of force, with a "hop". It can also create a 600 lb force, with a solid jump. With enough weights, on one-way gears, you can charge the whole system in a few jumps and it will last for several minutes. Plenty of time to switch to another platform with a dramatic "hop", to recharge it.

I wonder if you could get cast iron gear teeth made that lock into grooves in the plywood, like the blades of a jet engine compressor fan. that would still be light weight and very easy to repair!

I just want to say that the fact that you have a dream and that you are stopping at nothing to achieve it and not give up is truly astonishing. I think what you are doing is really cool, but also what you are inspiring other people to do is even more astonishing.

cant believe you shit on those people, in a video, for not having as many views as you. even though you're the one who gave them permission to build it. shouldn't you be more supportive? like i love your content, but that move was a little douchebaggy.

Martin! Once again thanks and congrats for the amazing work!! IMO you are just like Da Vinci from XX-XXI Century.

For your reflection. Are you considering the reasonable or somehow predictable wear on the gears, caused by the friction? I do realise that one of the features of MM3 is to have parts that are easy to replace, but in all of your videos so far I don't recall you mentioning the materials wear by friction or any other factors.

Wish you all the best! Regards from Brazil!

Will it ever ... ?

Wood Gears!❤

The gears are way too big. The bigger the gears, the less machine-ish the machine actually looks. This is a step back to that monster stage idea from some months ago that was just aweful... Oh well.

This week on "Martin has discovered a new engineering term and is redesigning everything around it." Tonight's episode: "Backlash".

Mmm, yes, plywood. A certain recipe for success and viral videos.

I wanna see Da Vinci happy

Hey Martin! I just wanted to leave a quick comment because I'm currently also working with the production of relatively large gears for work. In the end, we decided on a solution where we mounted 3D printed V-shaped gear modules (PETG) onto a ring. Our main reasons for this approach were the low costs and the ease of implementation. It worked out really well.

As a young Maker, I've learned more about mechanical applications, Drafting, cad design, almost everything on Your library of videos through the entire journey of the marble machines. So a massive thank you from me. Continue to inspire and do incredible things!

For some reason I have this belief that Doors of Stone and MM3 will be completed on the same day

I get all the stability of cross layers of plywood and then sealing it all for stability… but wait… the teeth will be in contact… friction causes wear,,, no more sealed wood… wood is no longer stable! Wh6 not use a more stable material?

Please 3D print the gear face. Keep the wood wheel.

You can then adjust the gearing specifications without having to redo everything. And if any damage during shipping, you can reprint segments to replace.

The idea of a torque wrench is amazing, but there is a catch. Wood density can vary slightly throughout a piece or across several pieces. So equal pressure is not necessarily equally flat. I would just use slow drying woodglue and measure everywhere with callipers

On another note, i used to tune my drumheads with a torque wrench, it is far from ideal, but with metal rims it is pretty good. After i made wood rims for my drums it was impossible to tune good enough with the torque wrench.

Another last point: you have good plywood so this may not be tooo big of an issue. But thickness isn't constant throughout. And stacking sheets multiplies this. So that would also change the torque per bolt. But i think this wouldn't be too bad. And you rout it anyway where its necessary

Love the idea though. The plywood aesthetic is just perfect

If delrin is viable alternative, is it not lighter, and is humidity not an issue anymore? Maybe Deleon gears with thin plywood on the outside for good looks and maybe a bit added stability? Would it be less noisy? Maybe too flimsy? Is a bit extra weight good?

What I find wonderful is that having followed on this long, long journey, we've watched Martin go from just excitement and skill, to vastly developing his knowledge. But I wonder how many people have noticed how good he's got at expressing what it means to be an artist, to be driven, motivated, by the vision of this ideal machine. Martin reveals so well exactly why artists create art - which is the hardest part to explain.

@Martin, yes, plywood gears are necessary for the cool factor. MMX even had a planetary gear train AND offset shafts, all bringing +1000 points.

BUT as an artist, remember to seek the beauty in the peculiarities your medium. With wood, even plywood, part of that beauty comes from the fact that wood breathes, it moves, and it has fibers and directional strengths.

The more glue you add, the less this is a factor, and at some point you are working with a very low-grade carbon fiber composite (wood Fibre in glue/epoxy matrix) instead of high-grade wood.

Peg wheels (see ancient wood gears in mills) work with large torque because they use the wood's strengths to advantage.

Spur gears work for the same reason, when made with plywood. The important thing is to design the gear tooth profile such that the contact line between two gears is a rolling line, not a sliding line. This is an art as much as it is gear tooth science.

Helical gears however... helical gears by right of their geometry ALWAYS have some sliding contact. This just won't do for a wood or carbon composite material.

Dude lost some of my respect for dunking on the metal marble machine based on their view count.

Another design feature that would help with localised expansion of the plywood would be to use curved spokes instead of straight. Old cast iron wheels or gears would crack when cooling. So their elegant "S" curved spokes would just curve a little more if they were hotter (more moist in your case) instead of pushing on the rim and cracking in hoop tension. Whatever you coat it with care must be taken to do it evenly. Un-even moisture content is much worse than overall expansion.

I saw a vault door. A liked. I left. Good job

Reach out to Frank Howarth from Frank Makes. He's a wizard on the CNC

I really don't see this a problem, considering you are planning every step ahead and using off-the-shelf bearings.

My only minor concern would be deformation of the larger gears under load. Maybe adding one or two layers of sheet metal in between? Would still look cool and the metal would be invisible.

(I also have no prior experience with gluing wood, so i also think the deformation might separate the layers, since they are staggered, correct me if i'm wrong, please)

It would be cool to watch how that Fallout Shelter door was made and mechanized.

The layers of procastrination goes deep. Martins 9 layers of MMX

haven't checked in for a while and it's good to see Martin motivated as ever despite changing environment!
As a scientist/engineer I am always a bit reluctant when somebody mentions "this will be done somehow/sometime by somebody". It's usually best to clearly define who will get things done, how and by when. Otherwise it is likely to be dragged out. Strange for me to say, as I totally disliked project management 1.5 years ago.
One thing I also can relate to is Martin getting all exited about the machine tolerances, just to add a lot of slack into the gears rendering it more or less obsolete in this case. But, we know it's there! and we know it can be done! ;)

i hope this over-enginieering will not turn into HELLical gears! :D

Keep up the good work, still awesome

Good luck, all the best, nice, very cool, keep up the good work

Here we go again... let's redesign everything again so I can keep making content insead of music.

BTW... there's probably a reason why no one has made plywood helical gears.

„The gears on the last machines were the best performing parts - so I am going to make them different this time“ 😅

Sorry Martin, I love your work and been following your journey for years now but couldn’t help noticing this 😅 I wish you all the best for the future and am looking forward to many future videos!

sick thumbnail lol