/diy/ - Do It Yourself

>>2719727
none in any first world, because we have things called regulations

>>2719772
Kill yourself, office worker. Your ignorance is a threat to the herd. This amount of stupidity will directly lead to the deaths of millions

Anyone doing repair that involves knowing some archaic machine code that has no readily available books in a language you speak, and everyone who might have even known someone that wrote it is dead. Anything that didn't immediately cause a problem might be doing something right.

>>2719727
Fireworks making has this superstition where you should turn off or leave your cell phone in the next room when handling powders.

>>2720183
You'll see that at a lot of companies. They're running ancient code, that works fine, as long as it keeps working, or super-specialized equipment from a manufacturer that is no longer around.

>>2719727
Well diggers, dowsing rods.

>>2719727
Pest control is up there if that counts. Blacks think anything we spray is magic while boomers think spraying shit with vinegar works

>>2719727
Stone autist here. I apprenticed for old school guys. My first teacher was a boomer who would move all his chemicals and products into new containers and rename them to letters in the alphabet. So the chemical crystalizer was in a spray bottle named "A", the tin oxide in a small Tupperware named "D" etc. he was paranoid AF his secret mixtures would be known.

In the meanwhile better products are on the market and I never use his techniques these days. But basically any unregulated or untaught niche trade will have a few crazy people in it with their own methods. I freely tell people what I use because there's tons of work out there for me and why not help other people out when they are stuck.

Specific to my trade is understanding how different stone types have different volumes of calcite, lime etc. have highly variable porosity, what a dolomite calcite stone will do - and how to adjust your speed, pressure and chemical concentrations to accommodate those mineral differences. There are so many types of stone you can't exactly write a manual about it, you sort of feel it out, even down to the smell. Example, some black stone smells like rotten eggs when you hit it with an acid based compound, you know right away it's a high sulfer material and should increase your water and reduce the compound or you'll bite too hard. Other stone is highly porous, eg. Some vein cut limestone, this would mean playing with a densifier to close up some of those internal voids chemically, this takes 24 hours to do, and not doing it will severely impede your ability to work the surface, so, yes that esoteric voodoo knowledge is necessary but only gained with experience.

>>2720494
>paranoid AF his secret mixtures would be known.

Sign shops and silkscreen printers do this a lot; none of what they do is that esoteric but they all act like their methods are trade secrets that must be kept hidden.

Screen printing itself does have a lot of little quirks and tweaks that aren't intuitive and may not apply in every situation...it's a mix of art and science and sometimes the old ways or the "wrong" tool or material/process saves the day.

But hiding that knowledge doesn't give you any advantage, and is just as likely to bite you in the ass when inferior work is assumed to represent the industry or the capabilities of the process.

>>2720405
Might have started as a superstition but it makes sense as a rule to avoid distractions and slacking off.

>>2720520
used to work in a flour mill and in the "dusty zone", any electrical device without a specific ignition safety rating wasn't permitted, which includes phones. just like at the gas station

>>2720449
Second this, Oil patch geriatrics

t. Oil Patch Kid

>>2720462
kek, my mom sprays vinegar around her house to keep away bugs. There aren't any bugs so it has to work!
>>2720569
Aerosolized flower is insanely explosive isn't it? Makes sense to be really careful then.

>>2720494
I worked at a shop cutting thin-cut veneer for a short time. The equipment was all things he had cobbled together from other things and the owner was super defensive about what it was made from, like if I figured out what brand of diamond blades he was buying I was gonna build a machine in my basement.
10 years later my ears are still ringing, always wear your earpro guys

>>2720659
Any combustible material is a potential source of deflagration when aerosolized. Flour is a common example because it is commonplace, but even dry grass clippings or chaff in a silo can explode with the proper ignition source.

>>2719727
any trade that requires tolerances .0002 and smaller you will have lots of borderline voodoo shit or just any machining trade really (tool and die, mold making, machinist, millwright to an extent) p much anything where there is 200 million different ways to get to the same place

still to this day there are mechanics that swear on their mothers that concrete actively drains car batteries so you can't set them directly on the floor otherwise it'll be dead flat by morning.

>>2719727
Machining, we use carbide inserts just because we heard they were better once. … on manual machines.

It works with cnc machines faster feeds faster speeds but manual machines there is a negligible gain for a major expense

Humans don’t have rapids that exceed hundreds of inches a minute we can only turn that crank so fast and so many times per day before we get tired

As soon as we take a piss all the benefit of carbide inserts on that lathe have all but disappeared or stop to take a drink from a energy drink

>>2721086
>Let's get ceramic tooling!
>For what?
>The lathe!
>We don't use the lathe, it's jus-
>Ceramic tooling!
>We only use it for in-house repairs, there's no-
>Ceramic tooling!
>It's manual and it maxes out at 960rpm! We liter-
>Ceramic tooling!
>IT CANNOT ACHIEVE THE SURFACE SPEEDS REQU-
>I told the tool guy to get us the good stuff!

>>2721086
Carbide does have niche benefits on a manual machine. For example if you want to machine something hardened.
Changing out inserts is easier than sharpening HSS.

>>2719727
Welding. The boomers guard their secrets like it's the philosophers stone.

>>2719727
Engineers working on fmcg for baked / moulded products.

Some mechanics seriously have a hard time believing you can fix stuff without a 100k in snapon shit.

>>2721086
this man has clearly never tried to machine welds with HSS, sure it can be done, but at what cost?


also watching carbide cut aluminum and soft steel like butter never gets old

>>2721024
this die shops and 100% manual machine shops full of old men who shouldn't be breathing let alone at work at 530 every morning drinking coffee before their shift starts at 7

>>2721875
Adeptus Mechanicus tech priests don't have shit on those guys.

>>2720181
that's fucking metal

>>2719727
Definitely electrical. Theres always two assholes in each their end of a power cord pulling each their way
>I think it had to go this way
I think it has to go the other way
>Idk that will be $2400, i think we need one more anon to help us
>Three yards (not a real thing) this way
Absolute scammers, nobody knows what the fuck is going on inside rhet wall other than it getting fucked by that there cable.

Gf roasted a chicken so fuck all of you. She just burned her fingers on the bone, the idiot

>>2719727
It's not really an official trade, but high rise window washing counts as being full of boomer voodoo. When I was in it years ago it occupied a grey area within OSHA regulations, so it was normal for window cleaners to get into huge arguments on rooftops about safety and technique. Technicians could argue endlessly about different types of equipment are safest or (oh god...) OSHA compliant, even though nobody knew anything and everybody broke whatever rules they felt like whenever they wanted. These days I think only meth addicts do it.

>>2721875
i'm a tool maker's apprentice, but i can't help but think how one guy with a cnc mill and lathe can output like 10x as much work just writing simple programs and passing them off to a set up guy.

>>2721098
i use ceramic inserts on the lathe at work(variable drive up to ~5k rpm) to turn hard(60-62 HRC) shit works p good, just have to take tiny ass baby cuts though

>>2723798
i mean dies make certain parts much faster than machining, 1 person sitting on their ass can watch the press make hundreds of thousands of parts .

mexicans do this too lol
if you met any mexican who is like really old and does one trade, hes usually very good at it , but godamm arrogant as a mother fucker lol

they dont even have to be old

its this weird thing where you come from shit and you make your shit job seem like i am superious and you cant do this

fucking shitty mechanichs are notorious for this shit

im a younger half spic and i encounter these men constanly lol

>>2719727
definitely mechanics. they could follow a troubleshooting algorithm written by the engineer who designed the car or they could let their gut lead them down the path of replacing every sensor they come across, and they choose the latter