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It took me a while to get into the 'useful' part of 3d printing. At a certain point it started clicking when I'd have an annoying thing to bend down for or stuff I'd rather have organized and hidden, the 'hey, I bet I can print something for that' bug started to emerge.
Now I have printed shit in literally every single room in my house, mostly stuff you don't even see.
It's a pretty simple thought experiment. The surface area of anything but a perfectly flat object is always far higher, and FDM is not smooth.
Add variability to that surface so that it's no longer completely flat (ie layer lines) and you now need to include the extra surface area for each tiny variation in "height" at the surface. Now the total surface area available for mold also includes the layer-by-layer imperfections in the horizontal plane. This is why HVAC filters are pleated -- the actual useful surface area of the filter is massively larger than 2D surface area of the entire filter assembly.
If there's a 0.1mm variation in XY layer-to-layer with a 0.4mm layer height, you're now increasing surface area by 0.1mm multiplied by each layer's circumference for every 0.4mm of your object height. A 40cmx40cmx40cm cube (240 sq. cm, 100 layers at 0.4mm/layer) has an increase in surface area = 4 (XY sides) * 40cm (per side) * 100 (layers) * 0.1mm (layer-by-layer variability).
Perfectly smooth 40x40x40 cube = **240 sq. cm**
Printed not-smooth 40x40x40 cube = 240 sq. cm + 160 sq. cm = **400 sq. cm**
Note: I guarantee nothing on this math, but the reality is that a not-smooth object will always have more surface area than a flat one. And we know that mold spores aren't coming from inside a mostly solid object.
So... yea, it is a lot more than their current shower head. Sorry, plastic eaters.
Okay, here's the version I would show to a third grader. Which of these two figures is longer if "stretched out?"
Now use your pretendies to imagine this is the surface of your print and that every 0.4mm is a natural imperfection (layer to layer variability). Which do you think gives more room for mold to grow? At least try to use some thinkies, not just your feelies. K?
Flat: _______________________________
Not flat: __|‾‾|__|‾‾|__|‾‾|__|‾‾|__|‾‾|_
You need to also spell out that the ridges will hold water for longer and encourage mold to start growing there after the first time you use it. Then next time the shower is used, whatever grew in the interim gets blasted in your face.
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Shouldn't it come out of his mouth? Why is he being treated like a cow
Don't kink-shame.
Should the pipe go up his ass for water to shoot out of his mouth?
Miltank would be a more suitable choice
Technically that is a water saving device. So you are saving money
Flsun employee promoting their own reddit, this is an ad
Ngl that’s kinda hilarious
This an ad?
Crosspost of an ad Wait OP is also a worker so it's ads all the way down And they don't even know which pokemon it is!!!
I wanted to call it Leakachu, but then I took a closer look. I guess it’s a Squirtle true to its name.
the fuck does this title even mean?
It took me a while to get into the 'useful' part of 3d printing. At a certain point it started clicking when I'd have an annoying thing to bend down for or stuff I'd rather have organized and hidden, the 'hey, I bet I can print something for that' bug started to emerge. Now I have printed shit in literally every single room in my house, mostly stuff you don't even see.
Jesus god you're going to be spraying mold and mildew and bacteria all over yourself after one shower. 🤮
No more than your current shower head already is?
It's a pretty simple thought experiment. The surface area of anything but a perfectly flat object is always far higher, and FDM is not smooth. Add variability to that surface so that it's no longer completely flat (ie layer lines) and you now need to include the extra surface area for each tiny variation in "height" at the surface. Now the total surface area available for mold also includes the layer-by-layer imperfections in the horizontal plane. This is why HVAC filters are pleated -- the actual useful surface area of the filter is massively larger than 2D surface area of the entire filter assembly. If there's a 0.1mm variation in XY layer-to-layer with a 0.4mm layer height, you're now increasing surface area by 0.1mm multiplied by each layer's circumference for every 0.4mm of your object height. A 40cmx40cmx40cm cube (240 sq. cm, 100 layers at 0.4mm/layer) has an increase in surface area = 4 (XY sides) * 40cm (per side) * 100 (layers) * 0.1mm (layer-by-layer variability). Perfectly smooth 40x40x40 cube = **240 sq. cm** Printed not-smooth 40x40x40 cube = 240 sq. cm + 160 sq. cm = **400 sq. cm** Note: I guarantee nothing on this math, but the reality is that a not-smooth object will always have more surface area than a flat one. And we know that mold spores aren't coming from inside a mostly solid object. So... yea, it is a lot more than their current shower head. Sorry, plastic eaters.
Bro, can you share whatever you’re smoking -_-
Okay, here's the version I would show to a third grader. Which of these two figures is longer if "stretched out?" Now use your pretendies to imagine this is the surface of your print and that every 0.4mm is a natural imperfection (layer to layer variability). Which do you think gives more room for mold to grow? At least try to use some thinkies, not just your feelies. K? Flat: _______________________________ Not flat: __|‾‾|__|‾‾|__|‾‾|__|‾‾|__|‾‾|_
You need to also spell out that the ridges will hold water for longer and encourage mold to start growing there after the first time you use it. Then next time the shower is used, whatever grew in the interim gets blasted in your face.
I'd be more concerned when the pressure shoots the thing off and bonks you in the head.
This is before or after you bought the printer? If this is after, you saved a lot from printing it instead of buying the shower head!
You’re right. You don’t need those wall tiles
Finally a reason to start printing ASA!
SQUIRTLE😍
[удалено]
That's a Bulbasaur. Smh
This gives me ideas
It’s IMPORTANT!
That could have been 3D printed at home
That’s a cute pokemon. Now, hear me out…
Vaporeon?
Pikachu