The Smart Tricks Inside Telescopic Machines

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Aldo

[@andrewsad1]

For the first and only time in my life, I'm glad I didn't skip the sponsor. Never seen a more relevant ad in a video. Super cool of them to be okay with you chopping up a leg from one of their desks to show off how exactly it works

[@DiThi]

It's so good that sponsorblock is only skipping a very small section about their webpage and discount (and I un-skipped it).

[@KnowArt]

Awesome to hear! Might show them this comment

[@xFuaZe]

@@DiThi This is perfect advertising, showing the innovation behind a product is both educational and makes you value the product even more.

[@rovz]

I was going to comment the same thing. Great advertising!

[@TennesseeHomesteadUSA]

What ad ?

[@dopeslope7]

I did hydraulic design for telescoping boom cranes. Each large segment had its own cylinder and oil was passed though the rods for the next section. The last 2 segments were the cylinder and chain combo. We set the order of segment extension to balance length and lifting capacity.

[@KnowArt]

Oh nice thanks!

[@raduradu5966]

Demag design ?

[@herosvicentegonzalez7872]

That was an incredible sponsorship

[@DamplyDoo]

Instead of sesame Street, i watched this with my son this morning

[@hasanali-us7jz]

W father

[@KKJKJH]

heck yeah!

[@metallbaumitmax]

You’re a good dad ! As a father myself, it is so important to teach and show them stuff like this. Even if they’ll never need it, this is how you get casual knowledge about things. So if some people talk about a specific topic, chances might be that you and your son can talk with them, instead of not knowing what they talking about

[@KnowArt]

That's so awesome to hear! Did he like it?

[@youteacher78]

German channel "Die Maus" is also a very good children's education channel.

[@The-Urban-Goose]

Taking apart the table legs was a brilliant visual aid!

[@TABRO284]

At @5:00 the cylinder that keeps the forks level is ingenious. No computers no sensors no wires brilliant.

[@KnowArt]

yeah and not even like a "pump" pump. No, apparently a cylinder is also a pump if you're smart enough!

[@outofthi5world567]

It is genius. In fact after years of driving telegandlers on dairy farms I never knew that until now. I will have to add though some do have some form of sensor or something as some have the ability to disable the auto leveling feature.

[@CGT80]

Farmcraft 101 has multiple videos on repairing the 80 foot lift that he bought, and one of the repair videos is on the auto level for the basket. The basket can be tilted also and I suspect it works with a valve to change the amount of fluid on each side of the normally closed circuit. When tilted, the basket still adjusts as the main boom moves, but maintains the offset from horizontal. Farmcraft shows the use and repair on many things around the farm, including other equipment, chainsaw sharpening (his video is the most detailed I have seen on youtube) construction projects, etc. He is very detailed and he explains his thought process for doing the work and also explains how the item works. This is the first video I have seen on this channel, but it fits right in with the other content I watch.

[@ke6gwf]

​@@outofthi5world567probably just a valve that locks the tilt cylinder where set, instead of being connected to the leveling cylinder.

[@outofthi5world567]

@@ke6gwf quite possibly.

[@sergiv5613]

I always thought it was an ai voice. Nice to put a face to the voice. You make very nice videos.

[@KnowArt]

What?! Lol But also thanks I guess?

[@RandomlyRedhead]

@@KnowArt same but i didn't htink it was A.I but till love your vids always taught me something

[@scottwatrous]

At this point if I don't see someone actually talking to camera I kindof assume it's AI. And even then.

[@xFuaZe]

Sounds like a Dutch accent though, so probably not AI. Unless it's AI trained to have a Dutch accent...

[@ker6349]

​@@xFuaZea lot of text to speeches struggle but a proper voice converter can do accents pretty well

[@PepijndeVos]

ohhhh I had to watch it twice to understand the cylinder that keeps the fork level, but that's super cool

[@KnowArt]

Yeah it was on the animation list, but didn't have time anymore! But glad it still landed

[@brandidonn7847]

Master-slave set up

[@amosbackstrom5366]

Yes, I believe they're called master/slave cylinders, but it's hard to find information specific to hydraulic systems because of car parts with the same name.

[@dickievanleijen1545]

I always wondered how they would arrange the levelling on the forks. But if the ratios are the same, it is easy. Brilliant stuf!

[@AlecSteele]

That’s so cool!

[@KnowArt]

Thanks! Love your stuff. If you ever need animation for one of your artisan/workshop tours, let me know!

[@MusicwithP-k9x]

Hi Alec 🙂

[@danmur15]

I've been loving these longer videos. When I was driving forklifts for an old job I had noticed the chain that raises the forks, but I never realized it was there to extend the possible height of them

[@KnowArt]

:)

[@Avidiy]

One word: BRILLIANT!

[@khoaicuber]

“I was about to say first”

[@Avidiy]

@@khoaicuber I was first so I quickly typed rubbish in, then I edited it :)

[@MihkelKukk]

@@Avidiy Yo that's actually BRILLIANT!

[@Avidiy]

@@MihkelKukk :)

[@thesfreader3068]

Not the same sponsor... :D

[@imabeapirate]

The fork auto-level with the follower piston at 5:00 is so fantastic. Mechanically simple, robust, and clever. great mention!!!!!

[@KnowArt]

People in the comments seem to agree that it's one of the mentions ever

[@thegooodguy]

this is amazing, love the crosssection animations that explain everything very well, thank you!

[@KnowArt]

Glad you like them!

[@neurofiedyamato8763]

That sponsorship actually well integrated without introducing bias to the topic being taught.

[@AJAllchin]

Sponsorship in videos done right! Nice work, actually means I'm thinking about the product more than I would otherwise

[@Giovanni_7282R]

Oh my god, this is huge. I'm working on a very similar telescoping mechanism for a robotics competition powered by the 6 weak motors I'm allowed to use, but this could save so much weight and give the lift an enormous power increase. Thank you for releasing this video at the perfect time, you absolute legend.

[@KnowArt]

oh awesome to hear! don't hesitate to send me some footage or tag me in a video. Would love to see the end results

[@Grateful.For.Everything]

Hope you found a way to incorporate the concept into your mechanism!

[@kos256]

since when did this guy get the most chiseled jawline I've seen

[@KnowArt]

lol, thanks

[@reggiep75]

He stole it from Handsome Squidward? 🤔... 😉😂

[@PsRohrbaugh]

That desk leg mechanism is brilliant. Also: in addition to hydraulic cylinders, pneumatic lifting cylinders exist. They're mostly used for lifting light loads a high distance - most commonly for antenna on mobile news vans. 5x to 8x their original length is common, but some go up to 10x. However they can only lift a few hundred pounds.

[@0LoneTech]

Pneumatics is very common in bus and train doors, adjustable suspensions, and Lego. Applications where it's a feature they're somewhat elastic, as well as less messy or risky when leaks happen.

[@KnowArt]

Cool

[@tjurzyk]

Around 1970 to early 90 some European trailer makers used pneumatics to lift bead's in their dump trailers. Biggest I've seen had load capacity of 14t.

[@TenaciousTomm]

We have a pneumatic tilt deck trailer at work that can carry a Cat D5. Using pneumatics to tilt the deck under load and gravity to come back down.

[@glassyuri_]

@@0LoneTech One of the major reasons to use pneumatics in trains and buses is that they already have compressed air available for the air brake.

[@diaancarstens1093]

This definitely tickled the engineering part of my brain (in a good way)... and not surprising for a dutch man to do so

[@KnowArt]

That's nice to hear

[@jeffrey1312]

When hydraulic cylinders are in compression there is a buckling force on them that increases wear. Although a cylinder in tension can produce less force than in compression, the cylinder life is longer because there is no buckling force.

[@KnowArt]

Oh that's such a nice fact! Thanks

[@cranelord]

Another cool thing about pinning crane booms is they typically have multiple pinning locations like 50%, 90%, and 100%. (The exact percentage is different between cranes). This allows a huge variety of configurations for higher lift capacities. For example on a 4 section boom you can run everything at 50% or even leave some sections retracted like T1 T2 T3 T4 0% 50% 50% 0% Larger cranes with more sections will have dozens of combinations to achieve the desired boom length and weight capacity.

[@KnowArt]

cool! thanks for the elaborate comment. It makes everyone smarter

[@TimFSpears]

Usually I skip over the ad parts. This one I was happy to just watch :)

[@ThZuao]

I used to work in the engineering department of a telescopic crane manufacturing company. They built models of those giant truck cranes until chinese competition outpriced them. They weren't in production when I joined, so I don't know much about them except they used a combination of double acting telescopic cylinders mounted inside the boom and the chain (actually steel cable) mechanism depicted here. But the smaller cranes designed to be fitted to common trucks (which is what I worked with) simply used one cylinder per boom section. The largest model had 8 telescoping sections. The way they extend is rather simple. The rod is hollow, but it has a secondary pipe that connects to a second port in the tip of the cylinder rod. When the boom extends, oil fills the cylinder in the advance side as normal, goes through the hollow rod up to the port in the tip. The second cylinder tube is fixed in relation to the rod, so you just connect the port on the tip to the back of the next cylinder with rigid hydraulic tube (could be hoses, but law requires tube because they don't put holding valves between sections). So on and so forth. However, each cylinder is double acting. The return chamber is connected to the other port in the tip of the rod of the previous cylinder I mentioned before. Inside the hollow rod, that secondary tube goes all the way to the piston and connects to the return chamber through a hole in the rod that is never covered by the advance of the rod. So all return chambers are connected. So are the advance ones. But each advance has a sequence valve that prevents a section from extending untill the previous one has fully extended. A properly adjusted boom will advance in sequence, but they'll all retract randomly because there's no sequence valve in the return. It's not a problem for operating the crane.

[@KnowArt]

thanks for the elaborate comment! cool to hear. Curious how this sequence valve works

[@JohnFekoloid]

The question that has been on my mind for 40 years. Finally answered. Thanks. I saw a Lego set for a forklift (8843) that did the chain/cylinder arrangement, and that made me realise and observe similar in real life forklifts, whenever I came across one. But I just never saw the inside of any boom crane/telescopic arm, or imagine similar inside.

[@TheTomconroy]

Im a crane technician, this is a solid video. The boom locking mechanisms on cranes are truly magic. (Not really) They are though electrically complex with proximity switches and length cables.

[@imanallamericanrejek]

I set up office furniture for a living (putting cubicles up and building desks) so it was awesome to see the height adjustable table (HAT) leg disassembled like that. Great video all around!

[@KnowArt]

Thanks!

[@DavidRisberg]

Love your enthusiasm about simple and elegant solutions (well represented at 3:16).

[@KnowArt]

:)

[@themacbookgamer]

3:40 Last week I was putting up a speaker truss for a stage and it used a similar mechanism to this, but instead of a piston it had a crank to extend/retract a cable that wound through pulleys attached to all the sections and a locking mechanism on each section

[@KnowArt]

Oh, so cool. Would love to see it!

[@mpkleinbreteler]

@@KnowArt dat heet een kanaallift :)

[@Radian628]

I wish all sponsored sections were like this: Actually relevant to the video and integrated seamlessly. Excellent job.

[@KnowArt]

great to hear! thanks

[@RocRocket-cl3vc]

Thank you❤. I was pondering on what drive to use on a project I have priced on. Hydraulics was one consideration at the time, but you have expanded so much on possibilities. Now I pray to get the work. Research is such a big time monster in pricing for small projects it is not feasible until you get the job. Sjoe. What come first😊

[@adrianthoroughgood1191]

OMG you are a real person, with a face and everything! I've only ever seen your voice-over videos before this!

[@MrJewishking]

One of best ad integrations I’ve ever seen! ❤❤ Pleasure to watch.

[@mortified776]

Never has a channel so up my alley, and with so many subs already, taken so long to show up in my recommendations. Algorithm dropped the ball on this one!

[@Ben-kt5rc]

I used to be a design engineer for a company building telescopic handlers. One of the disadvantages of a chain extension system is they're weaker, which means they're not really suitable for use with buckets and grabs. They can be used, but it will tend to stretch the chain requiring more adjustment and eventual replacement. Typically telehandlers for farm use will have a lower lift height and a sturdier, all-hydraulic system, but construction machines will have more lift height and a less-robust chain system (although there are exceptions!)

[@justin2955]

Good video best advertisement ever. I forgot that the end was a commercial 👍👍

[@KnowArt]

that must've been a big one! usually they're quite fast to set up

[@nodrance]

You have this talent, right up there with jared owens and eugene khutoryansky, that makes even the most complicated system or mechanism look simple when you explain it. You're the kind of channel we need more of. With cable TV becoming a dying medium, you're going to replace the likes of bill nye in the next generation's classroom learning

[@KnowArt]

now THAT's a compliment. Thanks

[@Krommenhoek]

It was great to have you over and we are glad we were able to help you. The video turned out great and is very educational. Keep up the good work!👍

[@chancecomic1595]

The animations are fantastic. Combined with the narration, I feel like I actually understand how these systems work

[@pieterpennings9371]

So cool of flexispot to just send you their flagship product to take apart. Super cool mechanism and very well explained!

[@outofthi5world567]

One of the clearest, and easiest to understand videos ive seen in a long time. And what a sponsor!

[@abundantharmony]

That intro shot was fantastically uncanny. I loved it.

[@stephanbuschmann7028]

Thanks for the explanation. I've been looking for ages to find out how telescopic cranes work. Finally, it's explained properly

[@rodenreyes6320]

Telescopic and telescoping. Former means " about telescopes", latter means " about mechanism of collapsible tube of telescope(specifically the spyglass of old)."✌️✌️✌️

[@yptrumpet]

"The forbidden icing" is now my favorite phrase.

[@mike.d.8]

You should add the sequencing boom sections of a Palfinger crane. They can have up to 9 sections and it’s really genius how they are able to sequence them all to come out in order. Also, the cylinders are external to the crane boom. They’re based in Austria so going off your accent it shouldn’t be too far from you!!

[@iggysixx]

Joe hef olmoost noo excent. Aai ken baerelie heer det joe aar Duts ;) But seriously - very interesting topic, and the animations that clarify your explanations of the mechanical movements, and the forces at work... Simply great. I love how you're able to explain a complex topic to simpletons like myself without an engineering degree. You're not leaving out information, you make clear the advantages and pitfalls of each engineering solution, and what is usually done to remedy said pitfalls. If you can explain topics without resorting to technical language or jargon, it means you have truly mastered that topic and understand everything intrinsically. Senk joe for sharing your knowledge, sir. Groeten uit Amsterdam 🤘

[@KnowArt]

Dankjewel!

[@snox_trot]

The way you explain things are just beyond amazing, please never stop making videos!!

[@KnowArt]

:)

[@bryanpivik874]

Best explanation of a telescope crane ever! Thank you kindly 😊

[@logitech4873]

Fantastic! You're really really getting good at this :)

[@KnowArt]

Thanks!

[@techman8817]

I watched a telescopic crane assemble itself over a few hours. Quite a long process, but nice and simple.

[@UninstallingWindows]

excellent sponsorship choice and integration. Thats how advertisements should look like.

[@aleclanter2177]

I just discovered you today, and you have the best energy of any science 'Tuber I've watched lately. Keep up the awesome work!

[@KnowArt]

Thanks a lot!

[@chri-k]

0:21 i can hear it

[@ntautomatizacion6359]

My mind has questions. And you sir... you have answers. Thank you breaking up the knowledge that surrounds us

[@davidswanson5669]

This answered so many questions - especially the telescopic desks that are so popular.

[@NitroNuggetTV]

spooky, I was just thinking about how crane booms work, and then you upload this lol A brilliantly articulated and animated video.

[@KnowArt]

Hahs strange how that works

[@craigiedema1707]

I just love the enthusiasm about the subject matter. This is a great video.

[@blakecharlton9449]

Thanks flexispot for adding to the video. An interesting design for sure. Great video over all

[@sferg9582]

NICE! Your graphic illustrations are top notch!

[@Rdifycuvi]

Your 3d models are great for teaching. Also love your sense of humor. Looking forward to more.

[@lolslim690]

I work at a crane manufacturing company, and seeing huge cylinders and bike chains is what I call them that they use is p. cool. we have these over head cranes high up on the ceiling that can go across the whole warehouse until it reaches the other cranes but we've had boom so long that it needed both overheard cranes and they were both almost too close to pick up this boom, but it can be done, and they have to be careful when sliding it into the turn table while making sure both overheads aren't going to trip the distance sensor

[@KnowArt]

sounds awesome! Which country? Can I come have a look?

[@karthick86c]

This is your best video by far! Thank you!

[@KnowArt]

That's great to hear! Thanks

[@AlexandarHullRichter]

The cool thing about the screw telescope system is that you can also add as many sections as you like to that, as long as the motor has enough torque to drive everything, and the parts are all strong enough that they don't twist under load. Of course, you could also build it with finer thread when you need more sections or to carry more weight, and then the system will be slower, but won't require as much torque to work.

[@KnowArt]

Yeah! I guess there are also diminishing returns because of friction and fixed length of spacers are stuff, but 5 sections or something like that should definitely be doable

[@zpinacz]

at 3:43 - brilliant explanation :)

[@TrixieDK]

Fantastic video. Thanks a lot. I would also love to see the gliders that prevent play between each profile explained in detail. And perhaps the lubrication system.

[@CCRoselle]

One of the BEST infomercials of all time! Thank you.

[@SiboBushings]

Clever and useful way to include a sponsor, very good 👏

[@yacinealg152]

Thanks for the video ! Also, thanks for the sponsorship part, it was actually useful

[@rotorrant5867]

Just an observation on the double ram forklift. I’m only guessing but as an engineer, I would say that you cant have a port as it will allow the system to stop and not move. If you look closely you will see that the rams are different diameters and the connections are always open. The larger diameter will move first until it stops then the pressure increases raising the smaller one as it has less surface area and hence needs more pressure. Simple physics.

[@TheBaconKing32]

Great video! I love seeing cylinders being used in the wild. There really is no up or down when it comes to cylinders. In my time making them, iv seen them used in the weirdest ways lol.

[@KnowArt]

Thanks! yeah you're 100% right. I sometimes use a technically-wrong term to get the point across. And sometimes because I'm a dummy of course

[@TheBaconKing32]

@KnowArt hey you did good. It drew my attention and caused me to find a cool channel i dident knew existed.

[@howardrsims]

That was the most compelling in-video ad I have ever seen. Too bad I already have a standing desk or I would be looking at Flexispot.

[@1320fastback]

I drive a telehandler similar to the Manitou at 5:00. Already I wonders how all those chains inside the 4 boom sections worked! Thanks from California.

[@VoodooTrashPanda]

This is absolutely my kind of sponsorship deal: “Hey, can you send me an extra so I can take it apart and see how it works?”

[@aryansamadaee3924]

I love these videos. They show just how much genious engineering is everywhere!

[@DelLego]

Bro how do you answer the questions I didn't know I had? The animations really is the foundation of the video!

[@KnowArt]

that's great to hear! they're quite time intensive to make. So nice to know the animations are appreciated

[@dingus-dingus]

Absolutely Fantastic! Clear explanations and superbly visualized!👌😘

[@carlsenden]

The boom gripper/lock systems are great, but only if maintained correctly. In dusty, hot environments, they inevitably gum up or sensors fail and length cou ters, too (bad info in/out). There are ways and means to retract manually in these situations, but it can be quite an involved process with computer inputs and language intricacies (Japanese/German, etc). It's interesting how hydraulic booms can be configured in multiple variations for the same overall length: heavier sections extended, reduce capacity at radius, etc. It is important to consider this for capacity at lift and at place🤙🏻

[@anthonyellsmore4532]

That's genius engineering on the table leg. Definitely over my head 😅

[@swaggychicken.]

I literally cannot explain how much i love these videos

[@KnowArt]

[@jorcin03]

Great video!!! -you guys did a lot of work on this and it definitely paid off!!! 😊 Thank you. Cheers!!!!

[@KnowArt]

thanks, great to hear!

[@magicintelligence6625]

TWSBI fountain pens with a piston filler use a similar mechanism to FlexiSpot's screws to move the piston filler and expose the maintenance nut hidden under the thumb screw.

[@PanduPoluan]

Oooh, awesome education 👍🏼 Thanks for breaking down the secret to the elevating table!!

[@deucedeuce1572]

We used to make the 2-3 stage hydraulics that they use on those trucks that carry cars. Although the outer cylinders were thin aluminum and the tubes that connected the cylinders internal chambers was just 1/4" thick and 1/2" thick with 1/8" walls, the cylinders could easily lift the weight of the ramp with a cars weight on it. I was always surprised by that. I don't recall specifically, but if I recall correctly, the 3 stage one's could extend to about 2.6x their original length, with the longer one's being able to extend a little more than that. (The longer the cylinder, the longer the extension compared to its overall length due to less length/space being taken up by the parts that don't extend).

[@KnowArt]

Interesting, thanks!

[@57Jimmy]

Thank you for this wonderful layman view and giving me a good chuckle! Even though it is broken down into manageable sized bits, the info is still flying over my head as high and as fast as a U2 Spy Plane!🤣👴🏻

[@joels7605]

This is such a great channel.

[@a.lollipop]

i love your videos, they're always so informative and fun!

[@KnowArt]

thanks!

[@joshyingling]

Fantastic video, thank you for your contribution to us that want to learn

[@dietmarfinster3176]

Very well explained with great enthusiasm. Subscription is set.

[@KnowArt]

🤗 welcome

[@spicyF1]

wow, Im so glad I found this channel, great engineering videos

[@sharkbaitsurfer]

This is incredibly well presented and brilliantly explained - thank you.

[@KnowArt]

The comments are so insanely positive! Makes me very happy

[@sharkbaitsurfer]

@@KnowArt The comments are so insanely positive because it's insanely good - you've got serious talent!

[@tomc5165]

This video is simply brilliant ❤

[@Betruul]

this was highly entertaining & educational. pleasant.

[@KnowArt]

Great to hear thanks!

[@Fireheart318]

I’m writing a character that has an overpowered version of one of those grabby claws that old people use. It’s able to extend to several times its normal length to grab things on high shelves & far-away places, while still being able to shrink down enough to fit in a holster on her hip. Being a giant nerd, I couldn’t just say it works like that, I had to actually figure it out. I tried looking up how telescoping mechanisms work, but couldn’t find anything that would actually explain it. And then you made this lmao. I haven’t fully decided yet, but I think I’m going to go with either the double screws or the pulley system. Also, don’t worry about torque and grip strength or anything, this setting has “magic electricity” that can easily work the mechanisms.

[@KnowArt]

Haha cool

[@合合合合合合合合合合]

WAKE UP NEW LONGFORM

[@1crazypj]

I watched all of the video, even the advertising. 😎😎 Very cool mechanism

[@petrselic3235]

Great video, I was always wondering how inside of crane boom works

[@thebicyclesafaris]

This is so cool! Thank you!

[@philtinker2364]

Fascinating, and great explanation. Strangely, I was wondering about this a couple of days ago…. And along came a recommendation! Subscribed.

[@KnowArt]

welcome :)

[@cafeine]

Very nice explanation. I always wondered how they work

[@Amipotsophspond]

6:15 not sure if this is how they do it but you could use a spring catch on retraction of the piston to lock the extension in to place. provided that you did not extend in a way that gravity could move the extension. the retraction would always trigger the lock, and the piston extending would always trigger a unlock. so you use a lock that is that is bi stable and piston retraction and extension triggers the state change of locked or unlocked.

[@doodpersoon]

Leuke video man! Ik sleutel zelf regelmatig aan hydraulische cilinders en je animaties geven heel mooi weer hoe het spul in het echt werkt.

[@KnowArt]

Dankjewel!