#garfield Logs

Aug 18 2018

12:00 AM katsmeow: pick up a landline, send the cell phone a msg, so when the phone rings, the system is back up
12:03 AM rue_shop4: almost everyone up here has gotten rid of their land lines
12:03 AM rue_shop4: cause they have a cellphone
12:07 AM katsmeow: i assumed you saw them waving the phones in public or at work
12:10 AM rue_shop4: rlly kat, I was trying to start a list, I know the meaning of the words, but the words themselvs are gone
12:10 AM rue_shop4: I'm spending a lot of sentence-forming time skirting around words I cant recall
12:11 AM katsmeow: is it only nouns?
12:12 AM zhanx: rue_shop4, needs more vi d
12:28 AM rue_shop4: katsmeow, yes, I think it is....
12:28 AM katsmeow: dysnomia, so use adjectives
12:29 AM katsmeow: "that thing to hit nails with"
12:30 AM rue_shop4: thats what I sound like under pressure on last resorts
12:31 AM katsmeow: took me 40 years to be able to remember the name for the syndrome of not remembering names of things
12:31 AM katsmeow: but chip parts, i was fine with
12:31 AM rue_shop4: I'm losing those too
12:32 AM katsmeow: is it too late to suggest you stop chewing on the solder?
12:34 AM rue_shop4: I stopped when I was 10
12:34 AM rue_shop4: insulation is lead free isn't it?
12:34 AM katsmeow: nope, extension cords here carry warnings about lead in the insulation
12:35 AM katsmeow: plastics have other issues, pvc and cpvc pipe used here is illegal now in all of EU, afaik
12:46 AM katsmeow: what is the difference tween ordinary welded chain and hoist chain?
05:54 AM Tom_L: https://blog.cmworks.com/understanding-the-difference-between-chain-grades-and-how-theyre-used/
02:45 PM zhanx: look i am home early!
02:45 PM zhanx: and my motor drivers are still not here\
02:46 PM zhanx: i wanted to print a project box out for my garden system
09:49 PM * katsmeow wavers
09:49 PM * katsmeow prepares to poince
09:49 PM katsmeow: pounce,, or something
09:58 PM Tom_L: k
09:58 PM Tom_L: a
09:58 PM Tom_L: t
09:59 PM katsmeow: T
09:59 PM katsmeow: o
09:59 PM katsmeow: m
10:00 PM Tom_L: how tight should ruby bearing points be?
10:00 PM Tom_L: like in a umm.... mechanism
10:00 PM katsmeow: bare contact
10:01 PM furrywolf: barely. and they should be dry, not oiled.
10:01 PM katsmeow: crystals can be brittle, if they rub they can be chucnked off, like indians useto make arowheads
10:01 PM Tom_L: so if you can wiggle the bare something, they're too loose?
10:01 PM katsmeow: if they do not wriggle in use, they are fine
10:01 PM katsmeow: you wriggling it may be overstressing it
10:01 PM katsmeow: it's mounting
10:02 PM katsmeow: some preload springs for those are as thin as a human hair
10:10 PM Tom_L: ok i think that should do
10:11 PM katsmeow: think of it this way, the point is infinetesimally small, and carrying all the load, the concentrated load might be very high in terms of psi on the point
10:12 PM Tom_L: i broke the tip on my indicator so i had to get another one but i noticed the mount was a little too loose for my liking
10:13 PM Tom_L: it still has a tiny bit of wiggle but much less than it idd
10:13 PM Tom_L: did
10:14 PM katsmeow: if you adjust the cup the "needle" is held in, keep the shaft moving so it isn;t caught in a defect-divot in the cup and broken
10:15 PM Tom_L: i got one of these a while back free also: https://www.amazon.com/Mitutoyo-Digimatic-Micrometer/dp/B00WMLRBSO
10:15 PM Tom_L: still in the sealed wrapper
10:16 PM Tom_L: i was pretty happy
10:16 PM katsmeow: that looks spendy and incredibly precise
10:17 PM Tom_L: my kid won it at a contest and he already has one similar
10:18 PM * katsmeow wonders if Tom is stealkling all huis kid's toys
10:20 PM Tom_L: he won a state competetion and went to national and they gave it to him at national along with some other stuff
10:20 PM Tom_L: 'cnc specialist' was the category
10:20 PM * katsmeow knows of some welded "tow" chain with working load of 750 lbs that would be wonderful to have sprockets for
10:20 PM Tom_L: his calipers are nicer than mine
10:21 PM Tom_L: did you get that link i posted?
10:21 PM katsmeow: the one of the calipers? yeas, and i responded
10:21 PM Tom_L: no
10:21 PM Tom_L: the one about the chain
10:22 PM Tom_L: you'd left but i figure you read logs
10:22 PM katsmeow: ....no?
10:22 PM katsmeow: no, i donot read c-log's logs
10:22 PM Tom_L: https://blog.cmworks.com/understanding-the-difference-between-chain-grades-and-how-theyre-used/
10:23 PM katsmeow: i was interested in this one chain because it's ideal for slow loads where grease/oil is not permitted
10:24 PM katsmeow: and it is small enough that a sprocket for it cold be fitted to a HF 2000lb winch
10:24 PM katsmeow: and it's available at HomeDepot
10:53 PM * katsmeow goes afk for a drink
10:56 PM katsmeow: bak
11:01 PM furrywolf: :(
11:01 PM katsmeow: hmm?
11:01 PM furrywolf: you left ##engineering
11:02 PM katsmeow: o i do ot msspeak, etc
11:03 PM furrywolf: ?
11:05 PM katsmeow: if i say anything in there without [citations] , or they find out i have no penis in the house, i will get harrassed, safer to leave
11:05 PM furrywolf: I've found there relatively pleasant... why I haven't left.
11:06 PM katsmeow: ok
11:08 PM * furrywolf is trying to figure out the best way to wire up GFDI breakers
11:09 PM katsmeow: ideally, put the green wire on a separate gnd that goes back to teh breaker box
11:09 PM katsmeow: never use the shield (bx, or conduit)
11:10 PM furrywolf: gfDi
11:10 PM furrywolf: also, breakers. :)
11:10 PM furrywolf: 2008 NEC made GFDI breakers required for solar systems...
11:10 PM katsmeow: ?
11:10 PM furrywolf: the instructions with my GFDI breakers are exceptionally useless
11:11 PM furrywolf: GFDI breakers are designed to interrupt a ground fault within the solar array
11:12 PM furrywolf: they open the array's connection to ground, letting the entire array frames float at high voltage, but stopping the fault current
11:12 PM furrywolf: the problem is array ground faults are too low of current to trip the overcurrent devices, so ground faults never clear... and the grounding system is often not able to handle a continual fault without parts getting too hot.
11:13 PM * katsmeow nods
11:13 PM furrywolf: the GFDI breaker breaks the ground-to-battery-negative bond, ungrounding the array. it trades off the fire risk of a continual ground fault for the shock risk of the array, with a fault, floating.
11:15 PM furrywolf: so, on the plus side, your grounds don't melt. on the negative side, your array is now sitting at, in the worst case with my array, 140V. every metal part of it.
11:15 PM furrywolf: I'm not entirely convinced they're a good idea.
11:16 PM furrywolf: but, that's what code says...
11:17 PM katsmeow: i would have thought they'd disconect the array, and then report the voltages in a way you can count downthe array to where the fault will be
11:18 PM furrywolf: they also disconnect the positive from the array
11:19 PM furrywolf: but the array negative is still connected, and if the short to ground is all the way at the array positive...
11:19 PM furrywolf: they ever come with a big sticker... "Normally grounded conductors may be ungrounded and energized."
11:23 PM * katsmeow waves gnites
11:25 PM furrywolf: cyas
11:26 PM furrywolf: almost bedtime here too
11:29 PM furrywolf: I can't install it such that the entire system floats, because my DC negative is inherently grounded elsewhere... I can only cut the ground to the panels, which will cause the frames to go hot... I do not like that.
11:30 PM furrywolf: I guess I could get two-pole ones and cut the positive and negative
11:34 PM furrywolf: two-pole ones are $100 a pop...
11:46 PM * furrywolf gives up and heads off to bed