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xzzy posted:Pretty sure everyone has a screwdriver with a chunk of metal missing from the shaft. Nah, my screwdrivers just have marks that look strangely like the reverse of my hammer head on the handle ends. I do however have a wrench with a nice large burn mark on it. This wrench fits the terminals of my car battery. Those facts may be related.
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Oct 4, 2018 16:12
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YouTubeChat: I really like Abom79, he's good at explaining what he does and why he does it. He also seems like he really enjoys making videos. https://www.youtube.com/watch?v=yy-rae-aUSc
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Oct 4, 2018 17:19
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YouTube: South Main Auto https://www.youtube.com/watch?v=NAUkmDhjgEM This is a slight different mechanical failure video in that it is long and there no explosions. However, if you are automotively or mechanically-minded, I think you will get a kick out of it (if you aren't interested in diagnostics, you can skip to 17:20 onwards)
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Oct 4, 2018 17:26
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stevewm posted:I once vaporized a screwdriver... Or you could be like me and wire the neutral and ground backwards! Then you have an energized outer case of your dryer. That was a surprise the first time I grabbed the door...
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Oct 4, 2018 17:30
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Blue Footed Booby posted:Couldn't find my contactless tester, resorted to using my multimeter to check that I'd turned off the right breaker. Thanks to my shaky hands one of the probes accidentally touched the body of the switch at the same time as the screw. Well, now you know the breaker works, at least. stevewm posted:Dunno WTF we where thinking. You weren't. (Not trying to be mean - I've been there.)
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Oct 4, 2018 18:40
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I once tried to diagnose parasitic draw from a faulty head unit by setting the cheap multimeter to "current" and absent-mindedly measuring across the battery terminals. My buddy was holding the meter, I was holding the probes. "Weird, it's just dashes. Uh, this is getting warm." "Huh, do you smell ozone? Lemme take the probes off-"  *spark* The next day in our EE lecture, the professor specifically taught us about multimeters and how not to measure current. Timely. Turned out to be the head unit after all. Multimeter still works, just smells like smoke all the time. 
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Oct 4, 2018 22:45
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wolrah posted:Nah, my screwdrivers just have marks that look strangely like the reverse of my hammer head on the handle ends. One of those we all do once and maybe twice and boy now do we pay attention on battery changes.
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Oct 5, 2018 00:09
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C-Bangin' it 
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A friend had a farm pump that was fed from a single outlet on top of a telegraph pole. The pump was old and persnickety and hard to repair while constantly breaking down. The actual power supply had been dodgy recently so the friend (a qualified EE) climbed the pole with his fancy new multimeter to ensure we did indeed have supply to the pole. He then misselected Amps instead of Volts and asked the electricity grid how many? There was a blinding flash of light and miraculously he was unscathed by either electrocution, the likely but avoided fall or the vapourised metal and plastic that was once the probes, their wires and the end terminals connected to the meter. The meter did not survive 
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Oct 5, 2018 01:48
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xzzy posted:Pretty sure everyone has a screwdriver with a chunk of metal missing from the shaft. I was new and had not yet discovered the difference between turning the machine off and turning the disconnect off. (one leg of the 3-phase was used to power the contactor for the power switch.)
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Oct 5, 2018 02:15
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xzzy posted:Pretty sure everyone has a screwdriver with a chunk of metal missing from the shaft. Please, don't insult my talents this way. (it's a ratchet handle)
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Oct 5, 2018 02:30
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in my case it's a pair of flush cutters with a pair of semicircles burned out of the blades from where I tried to cut through a pair of wires without disconnecting them from the power supply 
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Oct 5, 2018 02:31
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Horrible electrical failures: while removing the battery from my brother's MS3 I had a long 1/4" extension (the back third of the battery sits back under the windshield cowl) fall out of the ratchet and land squarely on and immediately spot weld itself to the terminals. Fortunately I had a crowbar right within reach and was able to pop it off before the battery caught fire.
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Oct 5, 2018 03:25
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Sagebrush posted:in my case it's a pair of flush cutters with a pair of semicircles burned out of the blades from where I tried to cut through a pair of wires without disconnecting them from the power supply I read this, then saw your avatar and had a giggle.
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Oct 5, 2018 03:45
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I have a non-zero amount of things that I've killed by accidentally shorting them out with a single multimeter probe.Cartoon posted:A friend had a farm pump that was fed from a single outlet on top of a telegraph pole. The pump was old and persnickety and hard to repair while constantly breaking down. The actual power supply had been dodgy recently so the friend (a qualified EE) climbed the pole with his fancy new multimeter to ensure we did indeed have supply to the pole. He then misselected Amps instead of Volts and asked the electricity grid how many? There was a blinding flash of light and miraculously he was unscathed by either electrocution, the likely but avoided fall or the vapourised metal and plastic that was once the probes, their wires and the end terminals connected to the meter. The meter did not survive It's really a Fluke that he survived.
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Oct 5, 2018 04:14
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If it was a fluke meter, there would have been no flash or other sign of problem. I've hit a Fluke 87 with 350VDC in amps mode. Pop goes the $14 fuse, and nothing else.
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Oct 5, 2018 05:25
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Sagebrush posted:in my case it's a pair of flush cutters with a pair of semicircles burned out of the blades from where I tried to cut through a pair of wires without disconnecting them from the power supply
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Oct 5, 2018 12:25
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SEKCobra posted:My screwdrivers are german and rated to a 1000V with insulated shafts. So no. It's not voltage that melts the metal, it's current.
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Oct 5, 2018 12:57
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It is, however, voltage that overcomes the insulation.
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Oct 5, 2018 14:06
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Computer viking posted:It is, however, voltage that overcomes the insulation. Ask me how I found this out trying to troubleshoot connectors on an Electric Fence! Car jumper leads are NOT capable of insulating 7200 volts!
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Oct 5, 2018 14:41
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Crossposting from CA: When you think you've seen everything a lovely PO could possibly do, they find a way to surprise you again. From the Facebook Ducati Singles Club:   quote:Actually this one had a stack of O rings, two had drywall anchors, one had a larger bolt jammed in it. One of several WTF moments during the teardown! But nothing unrepairable. Four of the valve covers had robertson screws and drywall anchors inserted 
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Oct 5, 2018 18:01
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spog posted:YouTube: South Main Auto SMA is the hands-down best car wrenching channel in my opinion. He doesn't do stupid hi jinks and just gets right to work after short intros. I've learned so much on how to diagnose and repair random problems from him. It's nice that on occasion he's got his whole family on there. Seems like good people.
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Oct 5, 2018 18:08
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He had one video, though, where he was working on a Saturday and launched into an Obamacare rant. The comments...
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Oct 5, 2018 18:37
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Dagen H posted:He had one video, though, where he was working on a Saturday and launched into an Obamacare rant. The comments... Can't say I've seen him mention politics or religion. Either way he's good at his job so I don't care what his politics are.
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Oct 5, 2018 20:16
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Slim Pickens posted:Crossposting from CA: This frightens, confuses, and infuriates me. How do you even come to decisions like this?
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Oct 5, 2018 23:41
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If the screw fits...
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Oct 6, 2018 00:09
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I'm going to guess he stripped them, found a screw that would screw in, gasketed them, and said gently caress it Orange RTV was a dead giveaway to walk
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Oct 6, 2018 00:11
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MrOnBicycle posted:Also, I'm an idiot and just not realized that this wasn't the tool thread... This is loving insane and whoever put those tyres on should be taken out behind the chemical sheds and shot for gross negligence.
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Oct 6, 2018 04:35
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The real failure is the size of those brake pads and the completely solid, yet tiny brake disk.
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Oct 6, 2018 05:02
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stevewm posted:I once vaporized a screwdriver... I did that once, using a screwdriver to jump the starter contacts on a caterpillar DP-40. And there was that time I dropped the box wrench on the fully charged and unprotected ultracapacitor, resulting in the wrench welding itself to both posts. That was an exciting day.
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Oct 6, 2018 06:20
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Memento posted:This is loving insane and whoever put those tyres on should be taken out behind the chemical sheds and shot for gross negligence. Yeah probably one of the worst yet not too far fetched things I've seen when it comes to clueless car owners. That would never ever pass the yearly inspection in my country, which is very comforting to know.
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Oct 6, 2018 08:21
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The new Wrangler's front axle is attached to the frame with booger welds and they are failing. https://jalopnik.com/new-jeep-wrangler-frame-welds-are-failing-and-now-fca-i-1829551649
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Oct 6, 2018 11:37
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Throatwarbler posted:The new Wrangler's front axle is attached to the frame with booger welds and they are failing. Welding is part of my job, as well as developing new welds, sectioning, etching, all that. Insufficient penetration is serious business in oilfield stuff and can result in death. There's likely an engineer somewhere in FCA that hand-waved that joint after some shop trash brought it to their attention. E: looking more closely at the pictures it looks like the programmer for that welder missed the joint and nobody said anything. Unless it's electron beam welded there's no way that joint would hold since it looks like it should have been a fillet weld, not a straight through full pen ebeam weld. Ebeam is also highly unlikely on mild steel since he hardness goes way up and makes it prone to cracking. BloodBag fucked around with this message at 12:31 on Oct 6, 2018 |
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Oct 6, 2018 12:25
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And those are the welds we can see
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Oct 6, 2018 14:20
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BloodBag posted:Welding is part of my job, as well as developing new welds, sectioning, etching, all that. Insufficient penetration is serious business in oilfield stuff and can result in death. There's likely an engineer somewhere in FCA that hand-waved that joint after some shop trash brought it to their attention. So it’s fine? Nothing to worry about?
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Oct 6, 2018 15:06
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builds character posted:So it’s fine? Nothing to worry about? I'm sure the FCA QA dept was like 'they're going to be mall crawlers, it's fine'
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Oct 6, 2018 15:17
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builds character posted:So it’s fine? Nothing to worry about? Oh god no. It missed the joint and on another it cracked. Willing to bet some parameters were set wrong on the robo welder.
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Oct 6, 2018 15:18
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So roughly 4% of Wranglers are used offroad?
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Oct 6, 2018 15:31
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BloodBag posted:Oh god no. It missed the joint and on another it cracked. Willing to bet some parameters were set wrong on the robo welder. Sorry, that was tongue in cheek. Is this a thing that you think they’ll fix easily for future ones and that they’ll be able to just weld up on existing models?
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Oct 6, 2018 16:16
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Fifty Three posted:I once tried to diagnose parasitic draw from a faulty head unit by setting the cheap multimeter to "current" and absent-mindedly measuring across the battery terminals. My buddy was holding the meter, I was holding the probes. This is why having one of those 0-30V DC Current Limited Power Supplies is so nice. I use a ~30 eBay unit and it does what I need. (I do almost no analog anything) I dont always trust the current draw readouts but you get an idea and you dont have to worry about smoking stuff if your real problem is a short.
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Oct 6, 2018 17:11
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builds character posted:So it’s fine? Nothing to worry about? Pffft. A company that tosses on the wrong badges and will slap different trim colors on the opposite side of the vehicle. Of course there is nothing to worry about. Colostomy Bag fucked around with this message at 19:30 on Oct 6, 2018 |
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Oct 6, 2018 19:26
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