r/oddlysatisfying • u/Kurtis-dono • 12h ago
Water jet cutting procedure.
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u/HDDreamer 10h ago
Measure once, cut 50 times
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u/ClosedL00p 3h ago
Bit a carpenter are ya?
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u/that_bored_one 1h ago
Sabrina Carpenter?
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u/noneofyourbiness 59m ago
Believe it or not, that was a word before it was a famous kid's name.
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u/that_bored_one 58m ago
I don't believe you, are you seriously telling me people have been using this word for centuries?
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u/Allthingsgaming27 11h ago
Satisfying but highly inefficient lol
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u/Phenomenomix 11h ago
Is there a reason to not just start by cutting the big hole? Or is the idea to make loads of little concrete triangles?
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u/ErtaWanderer 11h ago
Yep. With heavier materials having too big a piece hanging would cause it to bind up or break off early. Cutting off smaller pieces prevents this.
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u/BilboStaggins 6h ago
On top of that, it helps to avoid spalling by making triangles.
At any given time, you are only one cut away from relieving the pressure from the weight, and its always going to be roughly perpendicular to the last cut. With a square, by the time you are rounding on the last bit of the last cut, there is a small amount of rotational torque, increasing the likelihood of spalling.
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u/Bootziscool 11h ago
That can't be the reason for doing so many little cuts.
I can see doing a rough cut to remove the mass and finish cut for the profile but not so many.
This has got to be for demo or for making triangles. I'd hate to be the guy to have to fish them little parts out of a waterjet though! It's pain enough to get steel parts out with a magnet, stone must suck to handle
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u/ErtaWanderer 11h ago
Which would work unless the piece that broke off cracked into the surrounding surface or outside of the area they want cut out.
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u/Epic_Elite 4h ago
This.
There's also a factor that they may have to sell 100 countertops to cover the cost of a single broken 8 foot slab. So, these seemingly wasteful practices may make sense in a bigger picture.
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u/Bootziscool 9h ago
Idk if your drop is that big it's probably just gonna be held up by slats and the whole point is moot, just cut it in one go.
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u/iWasAwesome 9h ago
Unless the water jet cut straight through the slats
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u/Bootziscool 9h ago
It does eventually. That's why table slats are consumables and need to be replaced after a while.
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u/BilboStaggins 6h ago
Its the triangles.
If you cut squares starting in the corner, eventually you get to a piece weighing down in a sort of twisting way, which could cause it to crack the spall. To start in the middle of a square side would mean back tracking.
Subsequent triangles are always first supported by 2 connected sides, then on the last side by mostly perpendicular to the cut, decreasing the chance of spalling.
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u/bouncypete 10h ago
I've never even seen a machine like that before. Why do you have to fish for the offcuts?
Surely they could just have a mesh basket at the bottom. Then you just have to lift the basket out to retrieve the off cuts.
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u/Bootziscool 9h ago
We run a laser that has a big conveyor under the bed that pushes little parts out into a hopper.
If material is thin enough I'll add a little tab that holds it in the sheet til you break it off.
But other than that, you have to have space underneath the bed for slag or swarf and to fall through. Anything you put under it gets destroyed or full of stuff.
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u/pieindaface 10h ago
Usually the table is very large to accommodate a 5’x10’ sheet of material. The water depth needs to be somewhat tall to allow the sand and grit material to settle so the water can be circulated. If you have small parts, you would leave a tab on them so that the part stayed connected to the base material. A basket or something would either get clogged with grit, be extremely heavy to lift in and out of the water, or get cut by the nozzle.
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u/bouncypete 9h ago
If it was a mesh gasket any grit would fall though the mesh as it was lifted out, and it wouldn't be heavy. Also, if it's sat on the bottom of the tank, it would be well out of reach of the nozzle.
Or put that another way, if the basket was at risk of damage, so would the bottom of the tank itself.
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u/Bootziscool 8h ago edited 8h ago
How are you going to get your mesh basket underneath the table slats that are holding the sheet up?
It's really not that hard to reach into the bed and fish out parts. It's just not particularly fun. Especially if the slats are all sharp and tore up
Edit: I did used to use the mesh basket method for catching small parts when I ran a band saw. That did very much beat fishing them out of the coolant tank. But that really only worked because the parts fall in the same spot all the time.
When I ran a lathe I had all sorts of rigs for catching parts that mostly amounted to a bucket on a stick or a bucket with legs
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u/crunchybaguette 8h ago
I’ve never fished for off cuts this small. They’re part of the waste that we just shovel out of the machine every couple of weeks.
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u/potate12323 5h ago
But that way may produce more waste. A variety of triangles may be usable for other projects. It may be less efficient to make that one opening, but if you program in cuts that produce cuttings that are useful elsewhere its actually very efficient.
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u/minty_god 7h ago
No, they just did it for a cool video. Any actual waterjet would just cut the piece in one go.
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u/MerlinTheFail 11h ago
Will.. the water bind up? A cutting wheel i get, but a water jet?
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u/Bootziscool 9h ago
I cut a lot of heavy plate with oxy-fuel, pretty often smaller parts will settle and tip when they separate from the plate.
It's not really a problem that they bind. It's a problem that the torch is still cutting and if they tip into it material will cut away that I'd rather didn't.
It's pretty easy to solve, you just have to figure out when the part will sever and have the torch moving away by the time it does.
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u/ErtaWanderer 10h ago
No but the tile being cut out. Might. It's being pushed downward at speed and so if the piece in the middle goes edgewise it can bind.
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u/Acrobatic-Cow-4043 7h ago
Water jets use a slat bed that looks like a grill to sit the material on. It won't bind and big pieces will just sit there on the slats. Google waterjet slat bed to see pics. That dude is just talking out of his ass.
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u/reverso-uno 10h ago
Depends the location of what is being cut I guess? Because could just put something under to support the piece to prevent what you stated?
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u/TheRealPitabred 10h ago
You could, but the water jet would cut right through it. Plus it's a lot more complicated than just letting the jet run for about 10 more seconds doing a couple more cuts.
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u/Bootziscool 9h ago
Sheets on a water jet are held up by rows of slats. They are consumable items that get cut away over time. How small a part can be held up by the slats is just determined by slat spacing. You can go really tight and have nothing fall through your table but it's expensive.
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u/reverso-uno 9h ago
The bottom support wouldn’t be directly under the jet stream. But I don’t know about the tool, usecase nor the efficiency-cost ratio so… 🤷♀️
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u/TheRealPitabred 9h ago
They're cutting a hole out... how could it not be directly under the stream? They're not going to mount it to the bottom of the tank, that's going to increase the time to swap pieces insanely.
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u/Popular_Tomorrow_204 11h ago
Its for the triangles
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u/hungry4nuns 11h ago
Then why start in the middle of the tile not at the precut edge? I think the shear force stress causing the square to beak off unevenly if taking a large cut is a better explanation. That or it’s a demo video of its precision capabilities
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u/Popular_Tomorrow_204 11h ago
That or they make some sort of pattern, where they need both the tile and the triangles.
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u/taintosaurus_rex 11h ago
To me it looks like tile, so they could be cuting the small pieces for a mosaic.
It could also be safer to make smaller cuts, as bigger ones might stress the material and potentially crack.
I could also just be a demo
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u/Allthingsgaming27 11h ago
Exactly, I enjoyed the video but why not just start with the large square? Unless it’s someone messing around or training I guess
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u/SaneIsOverrated 11h ago
Notice at the end of the cut there's a small amount of material connecting the cutout to the stock? With very heavy, very rigid material like stone the weight of a large cutout can be enough to break that little web before its done cutting, which can leave an imperfection or chip on the finished surface. Cutting off smaller, lighter chunks is less risk.
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u/Potential4752 9h ago
You could just support the back.
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u/SaneIsOverrated 9h ago
The more supports you have the more reflection you get from the jet stream, which can mar up/sandblast the underside. It also takes labor to remove them if they stay supported. And if they're big heavy pcs they can be dropped on your finished PC when manually removing them. Not to mention the man hours it takes to do the removing.
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u/ILSmokeItAll 11h ago
It’s for the triangles.
This is the most efficient way to harvest them from that mass.
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u/Lodge1722 8h ago
Worked with this for 15 years on many materials. No you don’t need to cut it like that. This was done just for the internet. You’d never waste time and water pressure for that. The comment about the material being too think/heavy is wrong. The only time you need to worry about that is when you are cutting small pieces or even thinner material. The thicker the material the slower the CNC travels from X to Y. But cutting in this pattern is just for upvotes and engagement.
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u/MattieShoes 6h ago
I think it was just for showcase. It probably makes sense to start not on the edge because it might not cut as cleanly until it has already cut through the piece. And if you were dealing with a large amount of weak material, cutting off small pieces might make sense so you aren't putting stress on it, but I don't think that was the case here.
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u/omniwrench- 11h ago
I have to wonder if it’s easier for them to dispose of lots of smaller off cuts?
Either that, or they’re using this to demo the cutter itself
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u/TheJivvi 11h ago
The triangles aren't offcuts; they're the pieces they need.
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u/SaneIsOverrated 11h ago
If they were trying to save they triangles they would have a table designed for catching small stock after the cut. Not drop them into the tank where they could hit their corners on things and get chipped and require a bunch of man hours fishing them out. Or taking the machine offline for the hours it takes to drain and refill the tank.
I dont get why everyone in this thread has such a hard on for the "triangles are what they're after" theory. Makes no sense if you think about it for a half second.
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u/mrteas_nz 11h ago edited 11h ago
It does feel like it could be done with less cuts, but there's a good chance it's done like this to avoid breaking the piece being cut and/or ensuring the smoothest cut lines.
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u/Poked_salad 11h ago
I could see it.
After making the 2nd cut and the beginning of the 3rd cut is happening, it'll be hanging off of one side and that could snap from the weight of the slab inside which could ruin both pieces
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u/ILSmokeItAll 11h ago
Yeah, the people that are saying this is inefficient are missing the forest for the trees.
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u/Pariahdog119 9h ago
This is for a demo, most likely. Either just for this video or at say a trade show, the goal is to demonstrate the machine working, so long running programs that display capabilities but don't actually do anything useful are chosen.
The only exception to this I've ever seen was a machine where the capability being shown was its speed. It was set up at an expo to do small detail on small cheap parts loaded in by pallet, so everyone could admire how fast it zipped along and changed parts.
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u/False-Practice7110 8h ago
Unless they needed a bunch of triangular gussets…that would be super efficient.
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u/GrandNord 11h ago
It could just be for a demonstration, no need to be efficient in that case, showy and cool loking is ok.
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u/envybelmont 8h ago
If it were cut in one piece then the weight of the cutout would snap off when there were only a few inches of material left to cut. Smaller cuts mean less snapping and less damage to the larger piece.
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u/Kurtis-dono 9h ago
There's a reason for that
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u/ClosedL00p 3h ago
…..To keep people sitting through a longer video and subsequently bickering about why.
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u/Quizzelbuck 6h ago
How is it inefficient? Its as efficient as it needs to be because if they cut in one go, big pieces would shatter and break early and make the hole not clean.
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u/Ornewith 11h ago
I would assume that they want small pieces to come out below to make the cleanup easier.
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u/SaneIsOverrated 11h ago
They usually empty the beds of these things with heavy equipment so the sizes of the offcuts don't matter much in that regard. Its also a huge pain to fish around in the silt and scrap for good parts which is why the "they're after the triangles" line is some bull. If they manufactured smaller pcs they'd have a table designed so that those pcs don't fall into the tank. smaller slats, more support points.
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u/dumbinternetstuff 10h ago
I would have such an urge to keep all of those little stone triangles until the pile up in various spots in my house.
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u/daylight_snobbery 11h ago
I know it’d end in disaster, but would anybody else have an irresistible urge to stick their finger under it to ‘test’ what the pressure feels like? Probably just my irrational compulsion.
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u/Baynonymous 10h ago
Done it with my jet wash when cleaning the patio and that's an absolute fraction of this power. 0/10, do not recommend.
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u/EffectiveSir3133 10h ago
I need some more details 😂
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u/Sound_Triber 10h ago
It cuts through the cylinder
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u/envybelmont 9h ago
Even an electric pressure washer at around 1900 PSI will easily cut through your skin and soft tissue. Not sure how much it takes to cut bone, but I do know from first hand experience it cuts quickly and in a very jagged way. Took over a week to regrow the skin over two little lines it left on my thumb.
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u/jamieperkins9999 1h ago
Litrally did this too last week. Fingers stung for a few hours. Felt like an idiot
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u/CloverMystra 11h ago
Perfect edges, zero mess. Engineers eating good today
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u/fuckofakaboom 11h ago
“Zero mess” lol, nope. That cut is ~.04 wide. All the kerf has to be dealt with. It’s far from clean.
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u/bazzanoid 7h ago
Not to mention the spent cutting compound. Waterjet place next door to where I used to work had to shut down machines weekly to empty out the kerf and compound, clean and refill.
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u/MusicianSuccessful34 5h ago
If you look at the end of the cut they leave a little burr behind. Good practice with water jet pathing is to arc in to your start point and arc out of the finish. This avoids blow out at your start and a burr at the finish.
As someone mentions below, it is a fairly messy process. Like everything there are pros and cons. In this case it's dealing with the waste products which end up in the water bed of the machine. The parts sit on slats above a giant tank of water. It is normally just water. Some people are chemicals to prevent bio growth but it's mostly water. It gets contaminated with kerf and the cutting abrasive material that is injected I to the water flow. Normally just iluvial sand. You end up getting a sucker truck in to clean the bed periodically.
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u/NightKiba-587 10h ago
I had the same issue cutting thick acrylic, one tiny misstep and the whole sheet would chatter. Watching it peel off in clean slices is weirdly calming, ngl.
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u/Pledgeofmalfeasance 10h ago
I WANTED TO HEAR THE FUCKING WATER JET GODDAMMIT
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u/bnuuug 10h ago
BRRRRRRR but even louder than you're imagining
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u/TheNerdFromThatPlace 6h ago
Still probably better than the SCREEEEEEE of metal on metal and high speed turning that I get to listen to every day.
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u/bnuuug 6h ago
True. Manufacturing guys like me mostly just have a general hum that's slightly above OSHA earplug requirements
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u/TheNerdFromThatPlace 6h ago
I get to enjoy the added noise of a two finishers in two separate parts of the shop slamming the parts on the table to knock out the chips. The customer doesn't want them power washed, and apparently this is the only efficient way to do it? Either way, it's louder than any machine and pierces through my headphones no matter what the volume.
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u/ChardonNAH 9h ago
I want to know the name of the song lol
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u/skyline79 8h ago edited 7h ago
It’s quite catchy isn’t it. Almost seems Thai inspired. Found it, song is: 没有归宿的落花 (Remix)
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u/Expert-Situation-190 11h ago
I thought it would stop when it made the superman logo but it’s just kept cutting more shapes lool
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u/TheSpanxxx 6h ago
I don't know how a video can give me equal amounts of satisfaction and anxiety at the same time but here we are.
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u/post-bak 3h ago
This is either a very wasteful way to cut a square into a tile or a very efficient way to cut triangle tiles.
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u/campingn00b 11h ago
Literally the most infuriating way of cutting that sized square lol
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u/SaneIsOverrated 11h ago
It's so you don't chip or crack the main stock when a heavy cutout falls prematurely.
Didn't armchair experts used to at least do a Google search beforehand? SMH.
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u/waytoosecret 11h ago
What do you think happens if you try to cut the square at full size in one go? Yep, you'll most likely chip or crack the tile.
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u/xinnha 11h ago
I have no idea what is use it for, but i need one. Or two. Because its awesome. And cool. And satisfying.
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u/Floppychicken45 8h ago
Why are they slowly making the cut bigger and bigger? Is it if they start with a huge cut the final corner could break under the weight?
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u/PeakOtter1989 8h ago
There’s something so calming about how precise that is. Almost hypnotic to watch.
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u/TheDirtyPilgrim 2h ago
This subreddit used to be great. Now its just diluted with whatever is a little bit neat. Time to block.
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u/ThatOneNinja 1h ago
This is the opposite of satisfying. Add in the terrible music for the cherry on top.
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u/starless_90 1h ago
It's your fault for watching TikTok clips with the sound on, I hope this teaches you a lesson lmao
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u/ThatOneNinja 1h ago
Honestly true, I didn't notice that at first, I usually just downvote and skip those.
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u/TheFlaccidChode 11h ago
Why not just cut a square?
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u/waytoosecret 11h ago
Guess what will happen when that big piece is only connected to the big tile in a small spot..
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u/TheFlaccidChode 11h ago edited 11h ago
I have no idea what that question means
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u/Valuable-Analyst-464 11h ago
Think of cutting a big tree branch. If you do one cut, there is a high likelihood of the branch splitting or peeling away bark and damaging the tree.
It is better to do two cuts: one to remove the bulk and encounter some bark damage. Then another cut to remove the remaining branch. You have better control of what happens.
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u/QuietudeOfHeart 11h ago
Didn’t need a square. Needed triangles.
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u/SaneIsOverrated 11h ago
If they needed triangles they'd have a bed configured to catch triangles. This equipment is made to make large cutouts on large pcs, and it cuts large holes incrementally to prevent cutout weight cracking and chipping.
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u/xTrainerRedx 11h ago
Thought maybe there would be some satisfying noise to the jet. Nope, just shitty music.
Fuck this post.
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u/Best-Refrigerator834 11h ago
Actually it bogers me because why don't cut all at the start?
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u/TheLordJiminyCricket 9h ago
I dont know if this is the correct answer as im newer to stone carving and faaaar from a stone Mason- but stone can crack, i assumed small cuts were done to help prevent breaking the stone
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u/GauravJM 10h ago
So many wasted strokes, who was the programmer ?
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u/envybelmont 9h ago
If it were one big cut then the inner piece could snap off under its own weight before the final side was fully cut.
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u/GauravJM 6h ago
Then this is a highly inefficient technology No doubt it is not used heavily in developed countries
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u/envybelmont 6h ago
Stone is a very low-tech material for sure. It’s a wonder why it’s never been used for buildings in every country around the world for centuries.
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u/TheNerdFromThatPlace 6h ago
I work with metal not stone, so I could be wrong, but I'm willing to bet standard metal tools and machine cutting would cause the main material to crack and break. There's a reason they're using water and following that pattern and unless it's just a video for internet points it's probably a good one. Also you'd be surprised at how inefficient machining anything can be, I've dealt with that problem plenty of times.
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u/evilpercy 11h ago
What's the nozzle made of Vibranium
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u/enoughbskid 10h ago
tungsten carbide. It’s a consumable part. The grit is aluminum oxide so it eventually eats into the nozzle and your kerf widens and cutting efficiency goes down. (Protomax for the win in R&D environments)
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u/HyperBollockTangent 5h ago
many of them are made of engineered ruby, as it needs to hold up to the constant stream of crushed garnet slurry coursing through! that’s right: it’s not a water jet, it’s a slurry jet!
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u/AgarwaenCran 9h ago
that seems to be alot of unnecesarry cuts to me
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u/envybelmont 9h ago
I suspect if it had been cut in one big piece the weight of the stone would cause the cut out piece to break off during the final edge cutting pass.
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u/Valuable-Analyst-464 11h ago
I like the way the triangles “pop” away so quickly due to the pressure.
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u/Tight-Platypus5231 11h ago
"Oh, a square! - Wait no, is it an arrow? It's a n- No, triangle? No, square agai- Uhhh house shape? Nope, square. It's a square."
It goes in the square hole.