|
fins posted:laser chat: a ~1kw fibre laser in a rust cleaning setup similar to this will heat the surface to 500-600 C. the photothermal effect will ablate any oxide layer, oil films, garbage juice etc present. source: me, the laser haver. (and "Effect of laser surface cleaning of corroded 304L stainless steel on microstructure and mechanical properties", HJ Yoo et al, 2022) So what you’re saying is, anything left is a bad mother fucker and soap and water probably won’t help?
|
#
?
Dec 4, 2023 16:31
|
|
|
|
| # ? May 30, 2024 10:17 |
|
|
laser guy here: any laser like that flat out is going to be a class 4 laser while class 4 lasers are like always dangerous, it also depends on the wavelength of the light. anything in the infrared range spectrum is doubly so, your eyes will fail the oh poo poo blink response that can prevent huge damage. anything over class 1 lasers i still reccomend dedicated safety goggles rated for the wavelength of the pew pew you are operating, hitting something that throws a weird reflection thats deflected and concentrated back into your your eye sucks.
|
|
#
?
Dec 4, 2023 16:37
|
|
|
LifeSunDeath posted:confirm or deny: safety squints totally safe with derusting lasers? quote:A pop or click noise emanating from the eyeball may be the only indication that retinal damage has occurred, i.e. the retina was heated to over 100 °C (212 °F) resulting in localized explosive boiling accompanied by the immediate creation of a permanent blind spot. Seems fine to me.
|
|
#
?
Dec 4, 2023 16:45
|
|
|
“A pop or click noise from the eye” is a new phrase that will live in my head right next to all the other phrases that dispassionately describe body horror, like “degloving” or “injuries incompatible with life”.
|
|
#
?
Dec 4, 2023 16:53
|
|
|
Snap, crackle and pop inside my eyeball.
|
|
#
?
Dec 4, 2023 16:56
|
|
|
still have a couple dead pixels in 1 eye after a class 2 laser reflected off some chrome weird and scared the poo poo out of me.
|
|
#
?
Dec 4, 2023 17:00
|
|
|
TehRedWheelbarrow posted:still have a couple dead pixels in 1 eye after a class 2 laser reflected off some chrome weird and scared the poo poo out of me.
|
|
#
?
Dec 4, 2023 17:33
|
|
|
Kith posted:did you know that the air can have a voltage How else did you think wind power worked?
|
|
#
?
Dec 4, 2023 17:34
|
|
|
Does the brain eventually learn to interpolate over the “dead pixels” in the same way that you don’t notice the natural blind spot where the optic nerve meets the eye? Or is it more obvious because the dead pixels are somewhere like the center of your vision instead of off to the side like the blind spot is?
|
|
#
?
Dec 4, 2023 17:50
|
|
|
Luneshot posted:Does the brain eventually learn to interpolate over the “dead pixels” in the same way that you don’t notice the natural blind spot where the optic nerve meets the eye? Or is it more obvious because the dead pixels are somewhere like the center of your vision instead of off to the side like the blind spot is? Yes which is what makes it scary depending on the size. A truck could be about to plow into you but your brain just fills in that spot with vague colors of what it thinks should be there like sky, so you don't even know you have a blind spot
|
|
#
?
Dec 4, 2023 17:59
|
|
|
Luneshot posted:Does the brain eventually learn to interpolate over the “dead pixels” in the same way that you don’t notice the natural blind spot where the optic nerve meets the eye? Or is it more obvious because the dead pixels are somewhere like the center of your vision instead of off to the side like the blind spot is? good question: since i wasnt focussing on the deflections they are fortunately not DIRECTLY in the center of view they are roughly about 30 degrees offset from my focal center in my right eye. this however is annoying as gently caress on a fairly regular basis, like "oh i see a few gnats" then you try to focus on it and it moves with your eye movements also i always have to triple take when i actually see a dead pixel in a screen. use your safety specs i was lucky, after like 15 years working with the big boy lasers and instructing folks in laser safety, dead pixels happen when you get complacent and sloppy even with lower powered lasers. if it were a class 4 that eye would be useless in like femtoseconds your blink reflex isnt fast enough beat the speed of light to save you on a visible light one, and if its IR thats where yeah you are gonna cook your poo poo because your eyes cant "see" it but its still like watts(or kilowatts) of power getting delivered directly on your optics. be safe with lasers kids. e: if you really are curious as to the specifics each type of laser (if its licensed and inspected) have a reccomended NOHD and ENOHD, NOHD describes just looking directly at it with naked eyes, and ENOHD talks about deflections, refractions and looking at it with vision aids like glasses, binoculars and optics. lasers (SHOULD) have a certification that you should be familiar with and should have a certificate much like chemicals have safety guidelines. TehRedWheelbarrow fucked around with this message at 18:05 on Dec 4, 2023 |
|
#
?
Dec 4, 2023 18:00
|
|
|
So it's like your nose in that you don't normally see it until you think about it, then when you do it's really annoying. E: Oh or glasses.
|
|
#
?
Dec 4, 2023 18:02
|
|
|
or how you dont pay attention to your tongue existing. but yes very apt description.
|
|
#
?
Dec 4, 2023 18:07
|
|
|
TehRedWheelbarrow posted:or how you dont pay attention to your tongue existing. 
|
|
#
?
Dec 4, 2023 18:09
|
|
|
you started it with the loving nose thing 
|
|
#
?
Dec 4, 2023 18:13
|
|
|
Grey Cat posted:So it's like your nose in that you don't normally see it until you think about it, then when you do it's really annoying. TehRedWheelbarrow posted:or how you dont pay attention to your tongue existing. but yes very apt description. Biting my tongue while looking at my nose and the rims of my glasses. I'm at work, so it's an OSHA appropriate post...
|
|
#
?
Dec 4, 2023 18:48
|
|
|
just take some deep manual breaths while being aware of that small itch somewhere on your body
|
|
#
?
Dec 4, 2023 19:09
|
|
|
Montague Tigg posted:just take some deep manual breaths while being aware of that small itch somewhere on your body Joke's on you, I was already aware of the multiple small itches. Also, I don't recommend playing with carbon rods and an old PSU to melt metals; the arc light sparks they make are Really Very Bright. I don't think I have any blind spots, but I do have a blob and another small spot that shows up if I blink while tired or my blood sugar is low. Fortunately well outside the center.
|
|
#
?
Dec 4, 2023 19:18
|
|
|
Computer viking posted:Joke's on you, I was already aware of the multiple small itches. Wait, did you make a rudimentary stick welder out of a power supply for a PC? Thread appropriate as gently caress if so.
|
|
#
?
Dec 4, 2023 19:43
|
|
|
another time safety squint aint
|
|
#
?
Dec 4, 2023 19:58
|
|
|
Warning: None https://twitter.com/bubblegumoctopu/status/1731568478505611419
|
|
#
?
Dec 4, 2023 20:39
|
|
|
Insane price for it too.
|
|
#
?
Dec 4, 2023 20:42
|
|
|
It pops up on Amazon from time to time too, and usually around Christmas. Most common use is using a generator to burn down your house, 2nd most common is cause someone strung up the Christmas lights backwards and wants to connect the female end to the outlet. I wonder how many Christmas lights you see every year have a hot male plug on the end of them.
|
|
#
?
Dec 4, 2023 20:44
|
|
|
I've got a hot male plug right here!! Oh my bad that's just a regular extension cord.
|
|
#
?
Dec 4, 2023 20:49
|
|
|
WARNING: None
|
|
#
?
Dec 4, 2023 20:58
|
|
|
Just make them with a fuse.
|
|
#
?
Dec 4, 2023 21:03
|
|
|
you have been none more warned
|
|
#
?
Dec 4, 2023 21:03
|
|
|
No. 6 posted:Just make them with a fuse. Hmm the fuse keeps blowing, but replacing it with a nail does the trick. 👍
|
|
#
?
Dec 4, 2023 21:18
|
|
|
|
|
#
?
Dec 4, 2023 21:21
|
|
|
Stoatbringer posted:Hmm the fuse keeps blowing, but replacing it with a nail does the trick. 👍 I didn't know I could use my finger nails to transmit electricity! BRB, have an outlet to touch.
|
|
#
?
Dec 4, 2023 21:24
|
|
|
I know that is dumb, but what would happen if you plugged that in? Would standard voltage immediately arc? Or would it just lie in wait ready to gently caress something or someone up at the first chance?
|
|
#
?
Dec 4, 2023 21:40
|
|
|
It's not unsafe if the prongs don't touch
|
|
#
?
Dec 4, 2023 21:42
|
|
|
deoju posted:I know that is dumb, but what would happen if you plugged that in? Would standard voltage immediately arc? Or would it just lie in wait ready to gently caress something or someone up at the first chance? It would lie in wait for the male ends to touch anything mildly conductive. Such as human flesh! mobby_6kl posted:It's not unsafe if the prongs don't touch You have to say “no conducto” first
|
|
#
?
Dec 4, 2023 21:42
|
|
|
deoju posted:I know that is dumb, but what would happen if you plugged that in? Would standard voltage immediately arc? Or would it just lie in wait ready to gently caress something or someone up at the first chance? It's like if you stick a fork in an electrical socket except the electrical socket carries its own fork attached at all times.
|
|
#
?
Dec 4, 2023 21:55
|
|
|
And the extra fun part is that HOT MALE PLUG is not only exposed, but probably chilling on the roof. Get some debris up there and baby you got a roof fire goin.
|
|
#
?
Dec 4, 2023 22:02
|
|
|
These signs make me laugh, because that's how you hook a boat up to shore power. There will be signs warning you to plug in the boat first so that you don't accidently electrify your section of the marina.
|
|
#
?
Dec 4, 2023 22:04
|
|
|
TehRedWheelbarrow posted:or how you dont pay attention to your tongue existing. but yes very apt description. TehRedWheelbarrow posted:you started it with the loving nose thing Welcome to grundle awarenesses hour.
|
|
#
?
Dec 4, 2023 22:05
|
|
|
deoju posted:I know that is dumb, but what would happen if you plugged that in? Would standard voltage immediately arc? Or would it just lie in wait ready to gently caress something or someone up at the first chance? The best case scenario is it touches something conductive that you don't care about, it arcs and trips the breaker and you go "Wow that was really loving stupid of me i'm going to remove that" Worst case is a death that takes a minute or two and hurts the entire time you're dying as your entire body locks up and you can't let go and you can't scream for help.
|
|
#
?
Dec 4, 2023 22:06
|
|
|
nomad2020 posted:These signs make me laugh, because that's how you hook a boat up to shore power. There will be signs warning you to plug in the boat first so that you don't accidently electrify your section of the marina. Proof please
|
|
#
?
Dec 4, 2023 22:06
|
|
|
|
| # ? May 30, 2024 10:17 |
|
|
It's a MacGyver taser!
|
|
#
?
Dec 4, 2023 22:07
|
|