I Made An Eccentric - And it's A Wonderful Thing!
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- เผยแพร่เมื่อ 16 ต.ค. 2024
- Apparently this is an eccentric - but that doesn't seem to be the complete name somehow. I mean, any cam or crank is eccentric, surely? The thing that makes this different (and amazing!) is the collar that runs round the outside of it - lined with bearings. I think it should be called an eccentric collared cam wheel (or something!).
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Apparently this is an eccentric - but that doesn't seem to be the complete name somehow. I mean, any cam or crank is eccentric, surely? The thing that makes this different (and amazing!) is the collar that runs round the outside of it - lined with bearings. I think it should be called an eccentric collared cam wheel (or something!).
eccentric sheave?
The Danish railway engineer, Otto Busse, invented the principle in the late 19th century, and it is called Busse's Patent. It may only be on steamlokomatives, his patent works
I know I have said it before but, your an absolute genius Tim, and if people don't understand that your day job comes 1st that's their problem. Your content is alway insightful and fascinating, it's always worth the wait because it's going to be something special. Like a lot of U-Tuber's out there, like you they have the day job or business to run 1st. The content is just a little bit of an added bonus for us.
Fantastic tim , how's about you look into cloning to fill out your mehal with extra Tim's to increase video frequency, I have a feeling you figure it out pretty quick!
I only know it as ‘eccentric’. From steam engines, particularly locomotives.
It’s eccentric enough not to have a last name. Like Madonna, Bigfoot, etc. 😂
I can't believe people hassle you about the pace of these videos - there's a new one every couple of weeks, with several different experiments in it (the sharp bolt teeth, the crescent slicer, then the sickle, and finally the eccentric), where some TH-cam channels would just have the one thing and stretch it out to 15 minutes. There's a treasure trove of invention in each video which makes this channel really stand out - you keep doing what you like doing and we'll keep watching!
Agreed
INDEED!
I just started watching these videos and love them! My wife is watching me watch these videos and is scared I am getting ideas for my place here in Northwest Minnesota! LOL
Personally, I like the random delivery of your channel. It means that there is always the possibility of an entertaining spark in my day.
I think moving the chopper away from the wheel is a great idea. If something goes wrong there's less chance of bending spokes or getting bits of chopper catapulted around the farm.
It's an epic project that will take as long as it takes. Good work!
Excellent design! Seems much better to have the chomping action away from the wheel, and that gives you an easy attachment point for other contraptions in the future. You might consider making the chomp happen on the pull stroke so there's no issue with flex in the shaft.
Good point!
Keeping with Tim's approach so far I would have thought that a flex in the shaft would be more desirable than a whirling dirvish coming off its frame in the case of a seizure. Either way, I'm loving the practical exploration of mechanics.
Hello NightHawk : )
To save the wheel in the case of a jam/stall it might be wise to have a breakaway section - possibly a covered portion of belt/chain/conrod that is weaker than everything else that can go wallop and be easy to fix, vs. a nastier point of failure.
"Huge forces concentrated into a tiny area breaks things" is the story of my life. There was quite the laughter at this utterance.
eccentric disc and eccentric strap is the name. I am flummoxed myself building them for my engine. They were invented in the Middle Ages on water mills and wind mills.
I had some googleling to do, maybe because English is my 2nd language. And finally I landed on the Wikipedia side "Eccentric (mechanism)".
@@bakudans4851 Thanks for that suggestion. It seems like Tim is building the opposite of a steam locomotive, converting rotatory motion to linear motion instead of the other way round.
Another fantastic video. Don't over work yourself and definitely don't regret not posting often! I think we all prefer to see a happy Tim than a stressed Tim! ;)
I came for the rails but stayed for the engineering. 😊 taking the cutting away from the wheel is a great idea! Take all the time you need on these videos; I’ll be back for each one. 😊
How could you possibly think this would bore us? I find this absolutely riveting viewing and could watch the entire build and operation in one sitting!
Thanks for including us in your inventing .
The ultimate man in his shed. Love these videos and it's a joy to watch every one.
Oh to get 3 hours a day in the workshop. Tim, you are living the dream!
Love your enthusiasm, you explanations and all that you share on here, Sir 👏
Your lengthy explanations are much appreciated.
I agree a genius idea. No scrap yards around Australia now. Governments world wide say we must recycle then put all the rules in place so you can't get the old stuff to give it another life. John
I have read the comments, and I do note that there have been quite a few who have expressed the same kind of thoughts as I am about to.
But I'd like to add my support to them.
Although you did it with a generous measure of good humor, I'm so sorry that you feel the need to justify yourself on the publishing your videos and also on getting the nomenclature correct.
Personally, I don't come here for a lesson in terminology.
I am a retired motor mechanic who transitioned to operating plant ( Bulldozers and front end loaders , mainly.)
Moved from fixing them to f***ing them, one could say.🤣.
just ignore the haters Tim, but please continue to show us the workings of your incredible mind!
I guess thats my big concern... if it all gets too much, the easiest way to deal with that would be to just keep it to yourself.
I hope you never do that.
All the best from hot Queensland, Australia.
Thanks Paul : - )
your 'steam punk limb removal contraptions' define a whole new category in the maker sphere
Some people would say you are a bit eccentric. They would be right, but that's wonderful too.
Im so hyped for the wheel!
NO apologies needed for the frequency or content of your videos. Your detailed explanation of your thinking (and the prototyping) improves the enjoyment of your videos. Keep up the good work and best wishes for continued success.
I must agree with you. The inventor was a genius. And it's a great idea to use it.
That was FUN! Just like re-inventing the wheel. Keep up the inventing,
If you haven't already, definitely get the book "507 Mechanical Movements". Or, just go find the animated online version.
Well worth your time in solving dilemmas like this.
I suppose, if asked, I would call this a cam. But what do I know?
Nice work though! Please keep at it. I love the concept of kinetic energy storage.
Please stay safe around that big old wheel. :)
this should really be mounted on a separate mechanism, connected to the flywheel by another belt. otherwise the forces involved further risk it breaking violently.
also, just generally having the sharpened elements on a separate mechanism will likely make it safer to stop both the bladed element and the flywheel in case of emergency.
I really like that response about those who complain. The more the more the merrier! The more funds they send the merrier you can be! We all have an opinion, but if I'm sitting on a chair getting annoyed because you're not working hard enough that makes me pretty small person.. I do enjoy enjoy watching what you're doing and you just keep what you doing at your pace. and if folks don't like it tell him there's an off switch on the side of their computer they can hit it and you go away. Best regards, Bob from Virginia USA
If tim builds eccentrics...
That does make tim an eccentric builder, am i right?
I believe that is how this works. :D
Great video Tim! I am very glad to see that you recognized the need to use the flywheel as a flywheel and nothing more. Grinding charcoal may have been fine, but processing wood with the flywheel was a recipe for disaster! However you tie the eccentric rod to any job, make sure to put a weak link of sorts between the shaft and the job so as not to risk damaging the flywheel. Maybe if the rod was two pipes where one slides inside the other so you could have a shear pin to pass thru them? That way if the rod "needs" to stop, the pin will shear off and the flywheel can keep moving without a sudden stop! Keep up the good work and stay safe! 👍😁👍
A weak link is important, but a safety off option or the possibility to apply and stop applying power could also be usefull!!!
Thanks - good point!
Excellent video bro, remember it was just a bee keeper who first climbed Mt Everest in 1953 (the year I was borne) so you blokes know how to get things done. Just call it "It's a one of those" or Bob for short. Safe travels
When it is time to build the chopping system.
You have to design a timed feeding control. So the pieces are some what the same length. Two feed dogs.
Maybe take a look at a diesel tree chipper.
One last thing is some kind safety disengage. As this huge wheel will hard to stop.
Cheers from across the pond.
Well, I had another thought.
I have been following the wood chopping designs for years now and want to suggest that you spend a few rainy hours looking at TH-cam videos from numerous Eastern European farmers who have designed exactly what you are also designing.
All of the designs for choppers that I can remember are fed manually with each log fed individually.
They usually cut the log through with each rotation so they are limited to a maximum log diameter.
In your original presentation in this video with the sharpened bolts you could also wear away larger diameter logs.
Not sure how many of the larger diameter logs you want to process.
I am lazy so I was always looking for a chopper that could be fed automatically from a hopper.
I look forward to your next video, be safe, there is a lot of power in such a large heavy wheel!!
Take the chomping at the video bit as a compliment, but don't feel rushed- make them whenever you feel like it.
The power developed by that beautiful wheel scares me- I wonder if there is a way to make it safer with some sort of mechanical fuse between the wheel and the destructive stuff. Maybe a weak link that will break or clutch that will slip. (and actually, a clutch could also allow you to quickly disconnect power without having to bring the wheel to a stop- might also be useful in your process, for changing bins or whatever.) Of course it is a complication...
Looking forward to the next exciting episode, whenever that may be.
Have a great day Tim!
Ingenious! Keep up the great work Tim. We live in an instant gratification era. To the impatient ones simply reply, All in good time. Rome wasn't built in a day!
Brilliant video! I like the solution you came up with. I did some research myself into wood chopping for a project and the best solution I could find is basically a cheese grater design. I.e. you feed a log vertically into the machine. The machine has a pipe with a slot cut into it that's sharpened. The cylinder turns and slices the log during every rotation. The faster you want it to go, the more edges you cut into the cylinder as well as turning up the rpms of the machine. I liked this idea, because it's relatively easy nowadays to acquire a large diameter pipe.
I find your solution fascinating though as I can see the steam engine influence. Also, don't apologize for projects taking too long. Sometimes that is how it is. You make mistakes or you imagined a mechanic working in a way that in reality it doesn't. That's how you learn. That's why you've got to show a lot of determination and tenacity when making something with your own hands. Often things don't go your way. From my own experience at least.
Fully agree. Our Tim reminds me of the early locomotive engineers, except with the addition of a plasma cutter 😂.
I imagine the result of the Rainhill trials might have been a bit different if Timothy Hackworth had had one of those !!
Thanks, Florian!
Hmm, not convinced - cheese is much less sturdy than metal/steel; which is much less so the case for wood vs steel, especially when you want to do cross cuts (i.e. across the wood grain).
If you research wood cutting mechanisms, almost all that attack wood at perpendicular angles (i.e. across the grain) are whood chippers, who basically destroy the wood's fibrous structure before cutting/chipping it into sizes that are too small to create charcoal (as per Tim's explanations) - these are to create mulch which is perfect for gardening/composting.
Anything I have found that creates wooden pieces larger than chips rely on pre-cut chunks of the desired length and then split them along the grain, basically rip-cutting or splitting similar to an axe or hatchet. And this is ideal for the reciprocating motion Tim is about to install onto his magnificent monstrous "Wheel of Doom" (if I may say so hahaha)
@@argh02 They exist though, albeit my description doesn't match all of the existing chipping machines. The industrial ones have a horizontal automatic feed system. I have also found vertical ones that use a gravity feed, but I don't if they would work as well as horizontal force fed ones. You can find the mechanism I am referring to by typing "drum wood chipper" into TH-cam or Google.
@@xFlow150 Agreed - but these oeprate at very high speed so that the amount of wood chipped off is of, well, chip size per cut across essentially the log's end grain.
These are too small to be useful for turning into charcoal as he already stated (@Way Out West - Workshop Stuff are you reading this? :-))
I am still seriously in doubt whether this would be the right approach
Sorry to hear you’ve been feeling both poorly.We just love the wheel it’s so good for our blood pressure.My husband loves watching you Tim best wishes to you both your videos are great and good for our health.Best wishes and GodBless.❤️❤️👍👍🤧🤧🤧🤧🤧🤧😴😴😴
Fascinating!
You have the Good - Cheap - Quick triangle ..... You can chose any 2 of them! I think you have chosen wisely!
Intuitively I think a cam always pushes something. A Crank can push and pull (or be pushed and pulled).
Your eccentric (good name) will, I think work well as a prototype but when spinning on your wheel may get heating problems with lateral forces causing metal on metal rubbing. Maybe a judiciously placed few blocks of wood, suitibly greased might solve it for little cost eather £ or time! ;o)
Correct! Also, a crank follows a circle, while a cam can follow any path.
I hope the bearings hold up - there are going to be some serious forces on them.
It is an interesting notion Tim that there are no scrap yards in Ireland. Having grown up there I remember going to the dump, before that became unsafe and inquisitive kids were no longer allowed. There was some motor breakers yards, but that was mostly a closed shop and you had to have a part in mind before you were entertained. Where I am now in England the local scrap metal merchant has a great big scrap yard full of big things and small, but they will not sell. they have a skip full of forklift batteries ready for off gridding, but they will not sell. I am not sure why, possibly it is just hassle. Some yards will sell but the scrapheap challenge type of yard does not seem to exist anymore, with a bus balancing on top of a boat. Luckily, living in the city people never stop throwing things out, so if you know where to look there is a constant supply. But scrap yards....
It's a mad world, for sure..
I think you are wonderful just the way you are. No need for theory or explanation. I think you are a modern day Heath Robinson - a national treasure !
Very interesting video.
I agree with other comments, it is an Eccentric Mechanism with an Eccentric Sheave, Eccentric Strap and Rod.
Thanks for interesting channel, cheers Peter.
Thanks, Peter!
Tim, Your channel is super. If I had the fund to fund you for a while I would. I am not in that boat. Your channel is super and try to promote it when ever i think that someone will watch. I super look forward to watching.
Thank God you moved on and developed your idea further… I won’t say anymore other than I love watching and listening to your videos.
Not boring at all. In fact, the denouement of this video was the most fascinating so far. Genius, indeed! (And I came here for the railway.)
Oliver Postgate reincarnated as a tinkering blacksmith, complete with Ivor the engine. Lovely stuff!
Hello Tim,
An eccentric sheave converts rotary motion to linear motion & is used to drive water pump rams or piston valves on steam engines. You have built a very clever version.
Best wishes
Thanks, Perry!
If the wheel were rotating in the opposite direction, the thrust would be completely horizontal and more force applied to the cutting edge on the wood and less down on the sliding plate. Nice build on the eccentric!
Your channel is the best tinkerer/fabrication that I truly enjoy watching, In my eyes Tim and Will too, are 'Geniuses'!👍👍👍
I just love watching you sort out all the necessaries, great stuff!
Does not matter what you call it Tim. Its brilliant !
Thanks Aoife : - )
Beautiful work, thank you for the upload!!!!
All coming together nicely Tim.
Making progress in the right direction!
Tim: NOT boring at all!
Now that you've sorted out the eccentric cam/crank jobby (amazing by the way!) the attached push rod could be used to push wood/charcoal/anything through a different set of attachments designed specifically for the job in mind. A sold upright blade to split logs in half (or quarters or eighths). Different sized grids to push the charcoal through to make it progressively smaller smaller.. and another crank coming off the push rod could be attached to an articulated and slanted table top which could "shake" whatever's on the table top down towards blade/grinder/etc. You could stuff the worlds largest sausages if you wanted to.
That is an impressive eccentric!! Very well done sir! I’m always impressed with your machine design! I believe those eccentrics are used in hammer mills (power hammer) like black smiths use. Your wood chomper could possibly use similar mechanism at the action end where a heavy spring will compress if wood is too much to chop in one blow. The spring would compress then encentric would rotate and then hit the log again. This will help protect that beautiful wheel you have made and prevent jams. (0:
very impressive. Please take your time on these things. Don't want to get hurt.
Excellent and informative work 👍👍👍Thank you for sharing. Take care of yourselves 🇨🇦
I add comments because apparently it helps with the TH-cam algorithm.
Your cam design is brilliant!!
Once serious forces will be applied to the cam there will be tendency to force the central plate out of the nice bearing races.
I would want to restrict any sideways play of the central plate inside the cage.
Just my thoughts as I was watching your very interesting video.
Work at your own pace you don't owe anyone anything!!!
I always found the idea of having the blades directly on the wheel somewhat concerning and dangerous, so I am pleased that you've put that idea away!
The reciprocating action however will much more usefull in so many different ways, either for cutting, or compressing, combing or shredding! I'm sure you could even use it to power a power hammer, if you want to try your hand at forging, or even use the extra torque to pump more air into Tornado? If you have water nearby, it could even work as a pump, or simply pump water around from the charcoal burner to your house!!! So many possibilities!!!
The entire setup also looks so much more Victorian, which I like very much!
Anyhow, keep doing your best, and ignore those impatient upload goblins!!! You have a farm to run, those people have no idea!!!
i like it....your crank could power an external log slicer...it would cut through most log diameters....until it jams.....then those forces would be scary.....think of a design that does not jam up.
What a wonderful solution. It's really amazing how the cam/crank combination spreads all of the heavy load over a larger area. I feel like I've seen this somewhere but can't think where
Thanks Tim it might be good also for sharpening fence posts. Cheers
Using the ring of bearings is simple genius; I've been puzzling for a while now on how to make an eccentric but never got past the need for a bearing surface machined directly on the shaft. Since I don't have the machining capability to do that, my ideas never progressed further. It seems so obvious now that I see your system but I never would have thought of it on my own!
Thanks Tim Can't wait for the next video.
I see possibilities, endless possibilities! This wheel is so much fun to watch!
Very cleverly thought out.
I think you doing just fine so people don't understand that others have a life outside of TH-cam and get they busy. I can't wait to see you next videos
I always appreciate your efforts on your railway, making charcoal, powering machines from a common motor.
Looking forward to your next video.
HI Tim! Another thing instead of your "inverted crank cam" was to have just a cam as you made at the steam engine, and then a push rod to split the firewood! :-) Or even could be double cams so it hits twice/ rotation! :-)
You're right, of course!
Love you, guys! Keep doin' what you're doin'!
👋😁👍
Keep your videos as they are - -I love these to bits - -and wish I was a neighbour and could come over to help .
Cheers - -Rick from New Zealand
I think with a wheel of that size, weight & speed (lets say angular momentum) the one thing you absolutely positively definitely need is a 'weak' point that will fail if anything jams and allow the wheel to continue spinning freely
A shear pin, as it were.
@@RussellNelson Or a sprung clutch
Good point!
@@wayoutwest-workshopstuff6299 Remember that this wheel is a giant gyroscope and if it is suddenly jammed when spinning then it will want to twist and will either bend or even snap it's axel (or bearings)
Hello from Detroit Michigan brother thank you for sharing your knowledge and expertise and GOD-BLESS
A collared eccentric is a Priest who has gone a bit batty. A regular eccentric is just a man who builds wonderful machines in an unusual way.
Keep up the amazing work Tim! love seeing what you've been up to!
That thing looks fantastic! Call it whatever you like.
I do, in fact, like your new collared, eccentric cam very much, tim.
I would like it just the same if it turned out to be a crank.
You can tell it that from me.
I have seen a log splitter, or a few, that used a large wheel with a blade (or bit) on the perimeter of the wheel. The operator would hold the log on an anvil and the bit would come around and chop it in two.
Very nice work on the wheel cam/crank. Quite interesting bit of work.
The blade needs to be further from the wheel so that you can slice 0.5-1" slices off the log. Getting discs off the log will be beneficial anyway for other things. To crush charcoal I would use a Jaw Crusher. You ca dump in the coal and 2 boards coming together crush it until it is small enough to fall out the bottom.
Excellent video. I'd just call it a cam because it is.
Your big flywheel is to increase inertia, but you don't need to drive directly from that. It would work just as well as a stand alone flywheel, allowing you to take the drive from another belt and pulley on the engine. This opens up a complete blank page to design your chipper however you wish, but without modification to your big wheel.
Good point
the name you are looking for is a Eccentric crank - The eccentric crank, also known as the eccentric pedal arm, allows you to make a smaller knee movement/bend compared to the unaffected side. An eccentric crank is usually made especially for you. The size depends on the knee bend/hip movement that is possible.
Tim and Sandra I love you both keep safe Tim you can still use your welder to weld thicker steel just pre heat the base metal with a heating torch and weld the joint soon after (safety first remember)
I´ve seen this type of mechanism on Stephenson´s valve gear for steam locomotives. Hope that helps in your research.
I like that idea a lot better as all I could see with the old design was a lot of chips ending up 50 ft from the wheel as it would sling them like a slingshot in all directions!! Then there was the wrist of the log becoming a part of the wheel and then breaking and bending it up and becoming a dangerous catapult within its self!!! Just a watcher from Australia waiting for bits of wood and wheel to drop on me here🙃🙃🙃!!!!
Good to see your back on the mushroom's Tim !! keep up great work 👍👍 🍄🍄🍄🍄
Great video, I always enjoy them. I think this eccentric cam will only solve one of your problems, the crank handle problem. But you will still have the massive twisted force on the center shaft.
Tim, that eccentric crank is a great idea; you could perhaps make a slot where the flywheel axle attaches, so you could easily (?) adjust the stroke or power of the crank if needed? As you said, the only problem I foresee is the attachment to the axle, maybe a tapered sleeve? Great stuff as always!
Now that's getting a bit sophisticated, Tony!
Impressively frightening victorianan style machinery 👍.
I still like those slicing efforts made from car wheel hubs.
If you want a reciprocation action, you could look into how a metal shaper works. It has an eccentric that powers a ram with a quick return action. You will find it in most books about mechanical principles.
Love it....intrigued and inspired always. Best content on YT
This whole workshop is insanely inspiring, good job. Take your time for everything, dont rush. If it takes some more time its fine and it makes every single video more valuable and worth waiting for it! Greetings
"I'm just a bee keeper... learning mechanics" I call B.S.! You're an amazing bee keeper TEACHING mechanics!
I think you're going at just the right pace. 😀
A way to ensure it never has a catastrophic sudden stop could be to get your impact force from springs, and just use a fibonacci like cam or eccentric to provide the stretch force, and then immediately let go. If it fails to pull a full stroke, it won't shock the wheel and will just chop again on the next loop. You'll never put more stress on the cam surface than the spring force, but you'll also never be able to strike harder than the spring force. Orienting the impact vertically and adding mass to the chopping head could add the momentum assist that you're wanting from the wheels mass, but without the rapid disassembly potential if it catches a good knot or something.
Good idea, I think, Matt. I'll have to think about how to incorporate a spring though
Your humor is fantastic man! I'll definitely subscribe 😁👍🏻
Fantastic problem solving!
Great video ! I don't know exactly why people cant
't just enjoy what you have created instead of pointing out things like an arm chaired quarterback ! Either way you are doing a great job as well as learning as you go. At least you re doing ! I think if you want to complain then put your own video up to show the differences or flaws. Learning is a great thing ! Keep up the hard work !
coplane
Another wonderful invention arrived at by experimentation and lots of pondering (I'm assuming 😊 ). I have seen these eccentrics used on steam engines to operate the valves and have been fascinated at how they work. Great stuff. 👍
Be careful with the grinding sparks and wood shavings you have laying around. This things can smolder for hours before igniting while you are sleeping.
For the charcoal I would recommend something similar to a stone crusher
Amazing video as always :) Happy to see another video from your shop!