The Smart Tricks Inside Telescopic Machines

[@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 ?

[@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.

[@herosvicentegonzalez7872]

That was an incredible sponsorship

[@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 ?

[@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.

[@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 🙂

[@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

[@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!

[@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

[@AJAllchin]

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

[@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.

[@aaravmaheshwari3647]

this video made me understand these mechanisms greatly👍 3:16 , The excitement on his face😊

[@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.

[@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.

[@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

[@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

[@TimFSpears]

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

[@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!

[@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

[@kos256]

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

[@KnowArt]

lol, thanks

[@reggiep75]

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

[@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!

[@DavidRisberg]

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

[@KnowArt]

:)

[@Radian628]

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

[@KnowArt]

great to hear! thanks

[@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.

[@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 :)

[@pieterpennings9371]

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

[@nathanoy_]

This channel is such a gem. Always so incredibly interesting. So satisfying! Thank you!

[@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!)

[@alandouglas2789]

This was so informative, that I realised how much I don’t know half as much about something I thought I did

[@TCF640]

Im happy at how accurate the video and animations are. Telehandlers are one of the more common peices of equiment I work on. I will be showing anyone im mentoring this video to help them understand the boom chains/extension cylinder. The chains are a huge pain to adjust and replace if you dont know how they work.

[@outofthi5world567]

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

[@techman8817]

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

[@chancecomic1595]

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

[@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.

[@bryanpivik874]

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

[@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!👍

[@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!

[@snox_trot]

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

[@KnowArt]

:)

[@davidswanson5669]

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

[@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.

[@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.

[@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

[@craigiedema1707]

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

[@ntautomatizacion6359]

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

[@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

[@logitech4873]

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

[@KnowArt]

Thanks!

I absolutely love how enthusiastic and happy about a clever engineering design you're! ❤🤓 I have the same feelings when learning about this stuff.

[@abundantharmony]

That intro shot was fantastically uncanny. I loved it.

[@aryansamadaee3924]

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

[@Rdifycuvi]

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

[@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)."✌️✌️✌️

[@sferg9582]

NICE! Your graphic illustrations are top notch!

[@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.

[@tomc5165]

This video is simply brilliant ❤

[@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!

[@nevales]

Another intellectual being sharing doses for the knowledge thirst. Wish either im younger ir internet now was decades ago. Thank you so much.

[@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]

[@blakecharlton9449]

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

[@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

[@robertlarrick1807]

I wonder if you can use that flexispot design for heavy duty applications, or high volume of motion like let’s say 10 or more cycles per hour. I’m in mining and we use a fletcher drill, and it uses a pretty crazy double acting telescoping cylinder to move a drill pot from the ground position and move 5 feet up. It’s pretty crazy and it uses a lot of the designs shown on this video to achieve it.

[@CCRoselle]

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

[@PanduPoluan]

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

[@edwardcarberry1095]

Dam, you snuck in your commercial and it was good. Dam!!! I liked this one, which is rare.

[@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!🤣👴🏻

[@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

[@petrselic3235]

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

[@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🤙🏻

[@SiboBushings]

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

[@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.

[@ruslanserdjuk8029]

Locking mechanism is also hydraulic (pneumatic in very old cranes) and quite difficult. On the top of the main cylinder is carriage with another small cylinder (actually four, two for cylinder pinning system on both sides left and right, and two for section pinning). Those two cylinders are connected with pins on sides of the selected boom section, pins sitting in holes of section. By giving oil pressure the cylinders moving in and pull pins out from the holes during pressure remain in those cylinders. Closing operation is forced by springs to avoid any hydraulic faults. Position of the pins are monitored by sensors and not let anything go wrong. Due every boom section have holes in different places, main carriage is equipped with length sensor (cable with drum). Computer (in very old cranes operator) know exactly how far away is the carriage with pin mechanism and will stop main cylinder exactly against the selected pinhole. Thats the cylinder pinning system. Section-to-section pinning mechanism is the same and located on same carriage, only difference is pins are not always connected with carriage and cylinders. Once one section is telescoped out and locked, carriage will go down to take another section, section-to-section pins remain on top until end of lifting work and boom will telescoped back in. Computer have no any physical connection with boom sections, it just remembers which one and how far was telescoped (each boom section have many pinning positions with many holes, depending of manufacturer, 25, 50, 75, 90 and 100% for example), so tele-in operation will be done in vice versa subsequence. The pins don't look like round pin-hole actually. Holes are square with fortified edges, pins are the same, looks like lock, so it's not possible to open it without telescoping out about 2-3 cm. How the telescoping process looks like? Lets say operator select two boom section, lets say section B to 90% and C to 50%. Computer point view: unlock carriage from park position - move until section C - lock carriage to section C - move section C 3cm out - unlock section C from section B - telescope out until 50% length hole (position of all holes are stored in computer of course) - lock section C to section B - move 3cm back - unlock carriage from section C - move down until section B - lock carriage to section B - move out 3cm - unlock section B from section A - telescope section B until 90% length hole - lock section B to section A - move down 3cm - unlock carriage from section B - move carriage down to parking position. Done. Boom length may be up to 100m with this difficult system. Boom contain only one cylinder, so its remain light. Light boom mean more lifting capacity. Worst thing can happens with this system is blackout during telescoping process. In this case computer forgets what was already done and will not able to bring boom back to zero position anymore. Can by done manually by skilled operator or other technition person who know how and what to do.

[@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!!

[@joels7605]

This is such a great channel.

[@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.

[@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!

[@UninstallingWindows]

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

[@dingus-dingus]

Absolutely Fantastic! Clear explanations and superbly visualized!👌😘

[@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?

[@thebicyclesafaris]

This is so cool! Thank you!

[@1crazypj]

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

[@vasnellgeometrics6381]

Excellent video. So simle technic principles and so genius. Thanx for sharing🍀

[@endtimeawakening5557]

Awesome explanation! Thanks for sharing this in such an understandable manner! ❤

[@rudde7251]

Bro you gonna love Spiralift linear actuators from Gala Systems.

[@KnowArt]

WOOOOWWW! HOLY SHIT! that's so aasdjkhghjkfgjk what the hell that's so smart! best tip award goes to you. I'm gonna send them an email immediately to see if I can get a factory tour or something

[@rudde7251]

@@KnowArt This was my exact feeling too when I discovered this clever design. And I discovered it when I tried to design a standing desk that could all the way from sitting on a pillow on the ground height. All they way to standing. Unfortunately spiralifts have seemed hard to come by on the used market. I feel like my life was divided in two when I realized this divide, a time before I knew something like spiralift could exists, and a time after. Anyway, I also think you'll get a kick out of `Rigid Chain linear actuator` or `Tsubaki Zip Chain Actuator` kinda the same concepts.

[@KnowArt]

@@rudde7251 cool. Similar in concept, also very smart. But somehow way less cool

[@zpinacz]

at 3:43 - brilliant explanation :)

[@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.

[@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

[@u1zha]

Wow, I'm amazed that I actually never gave deeper thought about how the boom extends

[@yptrumpet]

"The forbidden icing" is now my favorite phrase.

[@bobthecomputerguy]

Great visuals that make these different mechanisms easy to understand.

[@KnowArt]

Thanks great to hear

[@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.

[@JaredAF]

Very interesting, my first thought was that the table leg used a multi start thread to telescope.

[@KnowArt]

Oh good one! Didn't think about that at all so haven't checked