BOLTR: Robot Hydraulic Flow Sensor.
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- Опубликовано: 3 окт 2024
- This is an interesting bit of industrial oddware. You don't come across hydraulic robots very often, even less of the feedback sensors for industrial automation. THANK YOU!
Long term projects here / ave 
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One of my favorite passages from the Parker O-ring Handbook:
"Very high pressures can be sealed without back-up rings if metal-to-metal contact (practically zero clearance) of the gland parts can be maintained. Instances have been reported of sealing pressures of 13,600 Bar (200,000 psi) with a 70 Shore A durometer Oring without back-up rings."
200,000 psi !!!
"thought I was wrong, turns out I was mistaken" -- friggin genious!
"Thumb detecting nut fucker" may have just killed me.
God i love this channel.
+Ozric M. I know it killed me, my side was already hurting before, now its more so xD
the bachelor party comment did it for me
When I imagine AvE's hyrdolic bartending robot... it will move the house around the glass in order to fill it with the beer.
I was thinking the same thing after seeing some of the pieces he plans t use to build FrankenTender.
PNP vs NPN explanation for AvE - NPN control signal if shorted to ground will see this as a "true" input. PNP needs voltage applied to it to see it as a input. Much more rare in logic control as a failure. If a wire gets cut and shorted, NPN says "Thats a go Houston" and PNP just sits there with a negative attitude. As for sensors, a PNP sensor will blow the output of the sensor if grounded. NPN does nothing. Both have their advantages and disadvantages.
There are 5 teeth at the end of the chopper shaft that spin past the proximity sensors. That means each is offset by 360/5= 72°. Half of 72° is 36°. Note that 72+36= 108°. This is close to the observed angle between the sensors (110°). Assuming that 108° is the actual angle between the two sensors, what it means is that one sensor is reading every full pass of a tooth, and the other is measuring the corresponding half pass. *Two sensors effectively doubles the sensitivity of the device* (as well as providing flow direction information).
+Penfold 'OoO' At first I thought this was the case as well, but if you look more closely you can see that there are 6 teeth at the end of the shaft and not 5, so the math is 60+30=90. Strangely it's not that, so there must be some other reason for the offset amount.
+Penfold 'OoO' There are 6 teeth, look at 12:19 , so 90 deg would work for what you describe. If this is the case and i believe you are right, there might be other reasons for the odd angle - looking at 8:01 i am thinking of: the chopper shaft is off centre to the housing, so in order to leave enough meat between the fastener and sensor holes, the sensor hole is angled but the sonsors still "see" the rotor as if at 90 deg. Either that or the engineer is just fucking with the guy that has to make it.
+JerTheRipper Damn... I think you're right. The reflected light in the 4-5min section of the video made it look like there were 5 teeth, but lots of pausing and squinting later and it does indeed look like 6. A 90° angular offset makes sense for 6 teeth. Given the precision engineering of this device, I don't think they would have settled for non-optimal positioning of sensors, so it must serve a different purpose (than resolution enhancement). Perhaps direction-sensing is it's only function?
+Penfold 'OoO' The only thing I can think of is perhaps they're set up in such a way so that both sensors aren't "off" at the same time for some sort of error checking (i.e., if both of your sensors read low you know that one has failed), while still maintaining the offset for direction checking.
+jozafax Agreed about 6 - my mistake. One other idea that just popped into my mind is that the company, instead of making two different sensor housings - one with a single sensor for uni-directional flow, and one with two sensors for bi-directional flow - just produces one product which caters to the most complex case (bi-directional, thus two sensors) and leaves it up to the customer as to whether they want to use the second sensor for a specific application. So this might simply be a "product line rationalising measure"?
Prior job, I worked with some high pressure systems that put the working fluid up to 125,000psi, within error less than 0.02% at any pressure level. It was marvelous equipment, the seals were mostly steel washers with a slight cone to them that would crush at specified torque, either on a shoulder or v-shaped mating surfaces. When working with high pressures, especially when dumping pressure onto sensors or otherwise (as in a calibration rig), resonance is a huge factor in accuracy/precision/repeat-ability. Maintaining the exact same cavity volume is critical, as even the smallest variations have exponential impact on results (ideal gas law PV=nRT and Hemholtz resonance).
Resonance? Now I'm imagining the fuckery that "water hammer" could cause at that kind of pressure.
I love watching his vids on how different parts of complex hydraulic systems work. I'm a crane mechanic so I deal with hydraulic systems a LOT. One cool thing we have is load sensors on the lift cylinder that reads pressure input from both sides of the cylinder calculate how much weight is being picked. It uses other sensors to figure out where in the load chart the crane is and let's the operator know exactly how much weight they are rated for and what they have picked.
We used similar hydraulic pumps on WWII submarines I served on. Compression type..we called them IMO pumps...meaning I move oil!!
I keep binge watching those videos, and I'm not doing any metalwork even as a hobby. Not sure what it is, but love the vijeos! :)
MGL lol half the time I have zero idea what he is even explaining, I come for the hysterical one liners
Nice to see a full length video. Thanks
I was design engineer for a manifold company my first couple years out of school. I must say that the engineering toward manufacturing is a very respectable effort on these doodads!! Good flash backs to some good times for me. Keep up the great videos!!
Sunday morning toilet session.......22min vidja later and now my legs don't work.......
+Stuff of Lard muahahah I know the feeling!
+Stuff of Lard so you are my long lost, pooping twin also with newly non-functioning legs eh? lol
+Stuff of Lard pro tip, don't lean forward with elbow on knees, add a recliner!your welcome.
lol trick is to push up with your foot to lift your legs every 5 min, it aids in circulation of your schmoo so you can keep watching skookum vjeos on the internebs... lol
Three years later and I just did the same thing
what's that wrench called? I typed "thumb detecting nut f*cker" into google and the results were not that wrench. lol
it's a Miners wrench, or Hammer Head cresent wrench.
No indeed, it came up with a hammer!!
3 years later. First image Google pulls up is of the actual 'Thumb detecting nut f*cker'.
It Vurks. It ackshually Vurks!!! :D
Try "Saskatchewan Nut Rounder".
Nothing warms the cockles of one's heart like the precision-machined parts of industrial hydraulics.
Nice teardown!
+Applied Science !!
+Mr Mürk !!
*****
Merry Christmas to you as well! Sure, you can link to my vids anytime.
Applied Science ,,love you
"If you don't know what tool you need, you don't need it!"
Well said.
97.899999% of the tech talk in your videos escapes me, but I'm fascinated!THANKS for the education!
I hope there's a "release the schmoo!" shirt.
There is/was
"Nothing tighter than stripped". Every time I watch one of your vids I get the entertainment of a new one liner. Love it.
I dig the way you're completely unheeding the boundaries of of niches.
Elon Musk said it nicely: "Frankly, I think most people can learn a lot more than than they think they can. They sell themselves short without trying. IT IS important to view knowledge as a sort of semantic tree -- make sure you understand the fundamental principles, ie the trunk and big branches, before you get into the leaves/details or there is nothing for them to hang on to."
I think dissolving boundaries between chemists, mathematicians, biologists, and astrophysicists is what will allow a crazy explosion of development. It's all the same physics, periodic table, and planet were experiencing them on together. It's time we start thinking about the sciences as one.
We're on our way there, I think.What about you guys? Cheers c:
+Divine Linker I think we need to maintain the seperation of the different specialisations. However, what brought humankind as far as we have come right now is the abbility to cooperate. So by all means specialise and make the loose branches strong as they can get, then cooperate so together we can make a new roof that can function as the foundation of a whole new side of science.
My wife just said, "next time, I'm going to tell you, oh yeah release your smoo"
No she didn't but I bet your buddy did.
Thanks for making these videos.
One of the best things in this video is the sheer giddiness in your voice. Made me chuckle.
A PNP configured as a High-Side Driver would be considered fail-safe as if the device were to short to ground it would not actuate or energise. The opposite is true for a low-side driver, but the advantage is low "on" resistance for sinking more current.
I was mistaken once...that was the day I thought I make a mistake... Love your show!
You guys should really invent a substitute to the percent (%) so it would be more coherent with the rest of the imperial system. Like replacing a "100 percent" with for example "234 looneyfent".
PS: I'm sure you turned the wrench exactly the right way.
we have several, but we name them individually. for example, the "pertwelve" is also called the "inch" and a "persixteen" is called an "ounce".
He Ka: No, no, you’ve got it all wrong; it would be 256 percent; it needs to be divisible by lots of things 😉
981porsche better use base 420 then
Amazing piece of hardware, absolutely beautiful. I actually have a degree in robotics, and was lucky enough back in the day to work on a Cincinnati Millicron T3 6 axis hydraulic robot. What a monster. It was slow, but massively powerful. It had nowhere near this level of refinement. I think the reason it never caught on, though, was due to the redundancy and expense of the 6th axis, and the laughably slow (cutting edge at the time) controller. I've been around a while, and have worked on a variety of fun toys, so I have seen quite a lot. Yours is one of the few channels that I actually am learning from; keep up the good work.
Winterfalke You ever work on schilling T3/T4 (fmc now) that's some bit of kit.
Great "autopsy" that lock washer did it for me . Best John
this is something completely different to what I work with. I am a design engineer for flowmetering and we use Orifice plates and differential pressure measurements. we also use venturi metres. i this is the first I have ever seen of a mechanical output meter. Thank you for the tear down, very heplful
thats some fancy engineering! this is about just as good as when i got to see a deconstructed 1890s traction engine in the process of being restored at the last steam show.
This video makes me excited for my fluid dynamics class next semester. Coming off of a Co-op I wasn't too exited about leaving the workplace, but now I am excited about the rest of my courses.
Great Video. Btw. the last austrian girl was a Bavarian. HB on the Beer-Mug stands for Hofbräuhaus and is one of the Beers on the Oktoberfest in Munich, Germany.
anschluss, dude
These have to be my favorite videos on all of RUclips
3:50 Glocks! Glocks are also hergestellt in Österreich!!
You're
making this up as you go along...carry on.
Fantastic Video Dude. Very Cool...! Keep up the great work. Nick.
I'm vary happy to know that other people in this world love the work that go into this stuff as much as I do. :)
Austria! Well, then. G'day mate! Let's put another shrimp on the barbie.
+salland12 Man, you are one pathetic loser!
"It's OK, I'm a limo driver!"
That would be Australia not Austria lmfao
salland12 thats Australia not austria
If you don't get the joke you obviously don't watch the EEV blog channel
this video treasures the fact that being your patreon is defiently worth a cup of coffee a month. cheers
The arrow on the body is a good indication that things are 1 directional.
Love your vids BTW, excellent information.
they couldve been used for 1 direction
If you are referring to the little white arrows, I think those were drawn by AvE to know how to assemble it again.
+serpentine1983 At 8:16 you can see a larger arrow next to the information plate on the blue cylinder. Also the white boxes on the info plate seems to make up an arrow if you look at the white triangle on the short end. That arrow points in the same direction as the smaller arrow.
I love it when you nerdgasm over machining, and hardware. I don't know anything about it, but I love watching your vids cause I learn about stuff I don't know.
Why don't you throw up a parts wish list for this thing?
All the money in the world doesn't mean he can find the parts or he is willing to blow his entire load on premium components. Hence why every part he has for the bar tending robot is either used or donated.
You have taught me 100% of all of my hydraulic knowledge so far! Who knew?
Would you consider making a video "draw my life" style? I would love to understand where you came from and how you became so knowledgeable within a shop. Or just comment back with your day job. ;D lol
Extensive industrial knowledge(and then some) and witty humor. Love it
"Thumb Detecting NUTFUCKER" LMAOOOOOOOOO
As an apprentice I used to get slapped if I used an hammer by holding it near its head
was told to use it by holding at the base of the shaft to get maximum effort
I now get annoyed when others do the same LOL
Keep up the good work, love your style of videos especially your crazy word descriptions
What microphone do you record with? Sounds like you're inside my head when I listen with headphones.
When the macro-focus decides to finally kick in, it's really friggin' sharp! Glad to see. Love the content, keep it up!
Texas,fuck yeah!! still my favorite place on earth. Hello from Texas
after a few months on your channel, ive bought a welder and a bit of equipment for mech/ee. i thank you sir, ill shoot a bit of dough, i want in on your other projects. finally use my degree for something. lol thx AvE
Well that was down and dirty, or at least oily. I can hardly imagine the bar tender robot that needs that kind of feedback. Why not just some little buckets that tip over on .1 oz of booze or something? Obviously this is some very high tech bartender. Just how much is this going to add to the cost of a box of wine anyway? Thanks for the video.
Amateur Redneck Workshop There’s no wine in the world that will cost as much as the BOM for that robot, lol.
This vid is almost 2 years old! Am I the first one to hear "You're expecting just a little squirt and you get the whole bachelor party's worth"? Both the funniest and maybe the most disgusting thing I've ever heard!!! AvE is awesome.
Can you please correct your English? Im from Germany and my English teacher says that my syntax is not choochin'.
He don't speak English. He speaks Canadian
The proper way to say that is "Canuckistani".
What an interesting device.
The Nord-Lock washers seem useful to know about. After hearing you say that they were the only ones that worked, I was intrigued and did some research on them. I'm sure I've seen some in my junk drawer, but didn't think they were anything different than a regular textured washer.
Thanks a bunch.
I kind of disagree with the "If you dont know what tool you need you don't need it"
Knowledge in industry can be hard earned. I work in an aerospace development branch and in my experience there's still a lot of tribal knowledge. There are lots of tools I didn't know I needed until I saw it.
"Oh man! Jesus, I think I was turning on that the wrong way. Surprised that didn't blow up in my face." this is now my favorite Ave quote of all time.
With BOLTR, who needs porn!
That's a very cool piece you got there. I'm just learning the basics of solid modeling and the different fits and tolerance at college and can't imagine the degree of tolerance that goes on with a part so complex
Why are you using hydraulics for a bar tending robot? Will it also crush cars?
+AvE could you make it so it does?
+Todd C. looks like a double negative to me :)
"Skookum as frig"
so skookum that it made him NOT swear... Impressive!
Eh... at least 3 of those 4 photos were Germans.
I believe the 4th was an East German.
John Malt That was actually the most obvious Bavarian. All that was missing was some more grease in his face.
+AvE you mean land of skiing, cows and mushroom gathering?
+Mike Bruschke That's the price you get for dumping Hitler on Germany.
That was a cool look into the guts of a cylinder that I'll never be able to afford. Thanks for bringing us along.
proud to be Austrian for once #scoocumchoocher
Those things are frickin' amazing. The way they mesh together just gives me major wood.
wasn't a south park reference in the beginning with pc was it?
I was wondering that myself... think he's in the right age range? I'd guess he's mid 30's-ish... hard to tell though
Unfortunately pc is well known now. It came from tumbr and feminists. Its a product of over protective liberalism where feelings matter more than rights. And south parks take on pc is perfect.
Every time I hear you give a tool a new name, it takes me a few seconds before I figure it out, but then I'm laughing for a good few more. "Thumb detector" is fantastic.
Kpa is the best unit for presure not bar and psi
+jamie .willis Pascal's for programmers who don't want to develop anything useful.
+Godfrey Poon well, everybody has to go thru elementary school, for which pascal was great.
(Or maybe it was just the time i grew up in (the 90'ies) when pascal was still a player amongst the programming languages)
+jamie .willis 100kPa=1bar
1Pascal=1Newton per square metre,
1bar=1kg (or 10Newton) per square centimetre
+G. Dalenoort When I was at college Pascal was the up-coming language. Undergrads used ALGOL 60 :)
+firoxlion and for those people in america who never learned the metric system, thank you college physics for forcing that on me, 100 kpa = ~14.5 psi
"Nothing tighter than stripped".... You sir, just reminded me to send you another invite to my bachelor party.
Most of the time I am lost with all the technical specs and details but I love to see you take shit apart, don't recognise most of the tools no idea what they are used for but it's satisfying to see the blood and guts autopsy
What gets made in austria these days? Emco lathes!
Interesting piece of equipment!
+AvE Haha, better not, thank you - My shop is completely full. And I dont think that cnc has a future if shit continues to go the way it is right now. Maybe prepare by learning blacksmithing.
I think the purpose for the two switches is similar to what you thought. The flow is unidirectional, but the shaft rotates both in and out as the pressure changes, so it will trigger switch 1 then switch 2 when the shaft extends and switch 2 then switch 1 when the shaft returns.
Best regards from Austria! I love watching your videos! Once i will go to Kanada on my Motorbike. :)
i fed off of your genuine excitement . you got yourself a new patreon guy, i wanna see more! keep em coming
I too have used those washers to secure 360hp ovlov diesel engine mounts. Those bad boys will not vibrate loose like most lock washers. Amazing inventions and keep the great vidjeos coming!!!
Glade to see that there is at least one more person that knows how totally Useless spring lock washers are. If you want something to come loose or fail guaranteed sure fire way to do it is to use a spring lock washer. Please keep spreading the wisdom.
This video is a masterpiece, If I had a museum I would have this in it.
Its the reverse of a supercharger, that equates measurable RPM to measurable flow.
Very nice, I love watching these videos.
As a software engineer who is thinking about going back to school for mechanical engineering JUST to do robotics... I look forward to the future videos... Consider my interest piqued!
***** thanks, I appreciate the advice, I've thought about both ways around this. Seems to be a very expensive and long road ahead either way. :(
Great video, great to see the hydraulic analogues of the electrical things I am familiar with. Hydraulic engineers have it much harder, hot oil is scary stuff.
Greets from Austria, Styria :) Love your vids AvE
i come for the interesting videos, i stay for lines such as "thumb detecting nut fucker" which had me in tears
For a mechanical engineer, this is just eye candy. Love it.
Good morning from Austria!
Best description of Österreich I've heard in a while..
Love the change in demeanor for a tool of this caliber, not much joking around, not much slashing the names, true honest boy-joy while handling this real
piece of machinery, it seemed like you were handling a new-born baby, the slime didn't help.
The headplate (for lack of a better term) is pinned to ensure that the rotor-to-casing clearance is set and maintained like in other positive displacement machines like lobe blowers or screw compressors.
Not only am I super late, I have no fucking idea what this guy is talking about... but I find it very interesting and I continue to watch till end lol
I've seen those half sleeves with a tapered head on one end so they lock into place under pressure, so mark the top to it when you fool with it. You don't want to be around one of those if you put that half sleeve slip fit upside down. It creates a knocking and you'll think the whole thing is gone.
Thanks for the video, a blast from the past for me.
Also, those can always handle more then what they are designed to handle. Just go easy.
Great work!
An upside down half sleeve would create the vibrations and knocking to break that piece you said was brittle. Sorry my memory isn't what it use to be.
I do not understand a thing about what is he talking about. But i can not stop watch videos of AvE
If you're wondering, the "boona end" o-rings are nitrile (Buna-N) o-rings.
You are indeed a mechanical sorcerer, good sir. An unending font of knowledge.
Hi AvE, i think the resolution of this thing is at least 48 pulses per rev,
because you also take falling and rising edges of the signal into account, which basically gives you 2 digit wide quaternary output ( four states of two sensors ). also, state of the first sensor should be passed to the other sensor or the other way and that gives you direction of the flow.
There is also a possibility that those are bipolar transistor based sensors, and if so, they will give you sinusoidal-ish signal and if you feed this signal to the ADC instead of the logic input, the resolution will be almost infinite.
The mind FUCKING boggles. The amount of time, creativity and precision craftsmanship that goes into manufacturing this kind of equipment is just... beyond me. I'm two steps from being a knuckle-dragging caveman compared to the men who birthed this magnificent contraption into the world.
There are two sensors, or should I say, two sensor positions, for various reasons and the meters generally come in various configurations from the factory.
1. You guessed correctly, they are often used as a form of error checking - if the magnet stops under/near one sensor, physical vibration (and many other environmental factors) can give spurious signals. Having the metering system require a confirmation pulse from a second sensor gives far more accurate results.
2. Having multiple sensors can allow two or more discrete/redundant systems with a vested interest in knowing what that meter is reading. Some systems require NPN (will sink a signal to ground), PNP (supply a signal pulse) reed switch or an AC waveform so there will be factory options for any or all combinations which may even be reflected in the serial number.
3. While you *can* use the twin outputs for direction analysis, these geared or screwed positive displacement meters tend to be machined to be uni-directional. (Did you notice the arrow sticker below the label?)
I have no experience with these high pressure meters, and would be interested in another video exploring the engineering of keeping the pressure inside through the glaring weak spot of the sensor ports and even where the magnet is mounted. In smaller and much lower pressure units, they just mount a magnet directly to the gear and sense it through a thin wall of aluminium.
And as for the strainers, they are a good touch because as you can imagine, if a bit of welding slag, welding wire, sand, gravel, masking tape, or a screw will fuck that beautiful engineering up real good. (All real life examples I have removed from meter innards).
"Looks like plastic, might be teflon". Got you there mate
The reason the proximity switches are 90° apart is to give extra resolution out of the hexagonal trigger. With only one sensor, you get 6 pulses per rotation, but if you add an extra sensor at an offset, you get 12 pulses per rotation, thus doubling the resolution.
"Expected just a squirt and instead ya get the whole bachelor's party worth" I don't have any tattoos, but I'm heading to the tattoo shop at the crack of dawn to get that stapled in ink directly across my entire forehead and torso region
"If you don't know what tool you need - you don't need it."
Impact Driver (and bits) comes to mind as a common exception. Hex-Bit socket set would have made your life easier in this video. In general, the tools that have less common / more specialized variations can fly under the radar of the uninitiated. A magnetic Pick-up and cheap 4in1 SnapRing pliers would be nice too. ...All stuff you can usually do without but sure makes the job easier.
Thanks to this channel I now go about all day saying how skookum that thing is, or how this thing is chooching along nicely...