#garfield Logs
Aug 03 2019
#garfield Calendar
12:33 AM rue_mohr: https://www.youtube.com/watch?v=XlRK_SMWX7Y
12:38 AM rue_mohr: wow that looks dry
01:10 AM rue_mohr: yea the sand I have would never fit thru a strainer like that
01:12 AM rue_mohr: hmmmmmmmmmmmmm
01:12 AM rue_mohr: ok, I have path corrections
01:13 AM rue_mohr: see another thing is that I cut the vent and sprue after the sand is packed
01:14 AM zhanx: I am about a month from casting in sand
01:19 AM rue_mohr: https://www.youtube.com/watch?v=-8KVdZIoNRQ
01:19 AM rue_mohr: huh
01:23 AM rue_mohr: uh, does that mean I can do copper?
01:23 AM zhanx: you can do bronze I would bet
01:26 AM rue_mohr: I almost wonder if we can use that insulation mix to make a flask
01:27 AM rue_mohr: the lack of safety gear is crazy, esp with those rotary castings
03:33 AM rue_mohr: https://www.youtube.com/watch?v=wvu2JDOlBok sugar
11:53 AM rue_shop1: 65.2mm
11:55 AM rue_shop1: x 200mm
11:56 AM rue_shop1: top overhang: 6mm
11:56 AM rue_shop1: bottom overhang: 10mm
11:56 AM rue_shop1: reverse top and bot numbers
11:58 AM rue_shop1: 22mm deep
02:31 PM rue_shop1: ok, so the bezel is designed and printing
02:31 PM rue_shop1: according to my list, I need to be working on that casting
05:08 PM eliz: We are hiring talented PHP devs! Decent salary, great team and telework. We want you! contact@belenvol.lu
07:47 PM zhanx: https://imgur.com/a/m7IrtXU
07:47 PM zhanx: bottom of forge complete
07:54 PM rue_shop1: 1kg of sand dug out of the yard (glacial silt) ->
07:54 PM rue_shop1: 830g after drying ->
07:54 PM rue_shop1: 623g after sifting
07:54 PM rue_shop1: I cant cast the platen for the vacuum table, I dont have enough greensand
07:55 PM rue_shop1: no perlite?
08:02 PM zhanx: no perlite its gonna be a shelf below the burner area
08:03 PM zhanx: just trimmed the sides to make it square
08:22 PM rue_shop1: well damnit
08:23 PM rue_shop1: I put the silicone casting in the smeter after It'd cooled a bit to loosten off the pla and the damn silicone caught fire
08:23 PM rue_shop1: crap, now I have to start again
08:23 PM rue_shop1: means waiting another week for it to set
08:25 PM rue_shop1: got a pretty good load of fine sand from the tub in the vacuum for the sand blaster
08:26 PM zhanx: ?
08:26 PM zhanx: oh
08:34 PM rue_shop1: whats funny is the cycle
08:35 PM rue_shop1: the sand blaster is great for cleaning sand off castings
08:35 PM rue_shop1: sand blasters and greensand casting go well together
08:37 PM zhanx: nice
08:40 PM rue_shop1: I'm gonna make like a wheelbarrow load of greensand
08:40 PM rue_shop1: been digging up the glacial silt from behind the shop
08:41 PM zhanx: i have enough bricks that I can make an entire area to do this in
08:41 PM rue_shop1: either I'm gonna be able to cast metal, or I'm gonna have that subterranean culvert second shop
08:42 PM zhanx: evil lair
08:44 PM rue_shop1: fill it with 3d printers
08:45 PM rue_shop1: "why does my 480 square foot shop have a 3 phase 600V 1200A service thats at 80% capacity??? WELL THATS A SILLY QUESTION!!! " :-S
08:48 PM rue_shop1: (cause that main breaker is only rated to 80%, duh...)
08:48 PM zhanx: lol
08:49 PM zhanx: wow this site has a gen at max also
08:51 PM rue_mohr: 1L / 1:15
08:51 PM rue_mohr: so the flow is...
08:52 PM rue_mohr: 13.33333333 ml/sec
08:56 PM rue_shop1: so, by my math, that means its pretty close to a minute to add a liter to the jug
08:56 PM rue_shop1: now I need a timer
09:16 PM Tom_L: i thought fire brick were tan
09:22 PM rue_mohr: maybe those are texas ones
09:22 PM zhanx: that is not fire brick
09:23 PM zhanx: that is red brick for a mold
09:25 PM rue_mohr: ahhh, sort on drawings
09:27 PM Tom_L: so i'm not loosin it just yet
09:30 PM rue_mohr: dont' worry, if you were we would stay quiet about it.
09:30 PM Tom_L: no, i'd rather know
09:58 PM zhanx: unlike rue I would tell ya
10:08 PM rue_shop1: my decision is undoable tho
10:08 PM zhanx: why?
10:08 PM rue_shop3: becasue I could tell at any point if its not already been done
10:09 PM rue_shop3: ? it took me 2 hours to cook tater gems?
10:09 PM rue_shop3: that might explain why their a bit burned
10:10 PM zhanx: i should go out and pull the side bricks so it drys more even
10:10 PM rue_shop3: na
10:11 PM rue_shop3: it should set, not dry
10:11 PM zhanx: well its set now
10:11 PM rue_shop3: it'll eat up the water on its own
10:11 PM zhanx: it was 95 out when I started
10:12 PM rue_shop3: you should try to make more regular progress, 24 years is a long project
10:12 PM zhanx: oh wow rue_shop3 made a funny
10:13 PM rue_shop3: maybe I'll try spreading out some of the sand on the roof to dry, using the tiger torch seemed really inefficient
10:14 PM rue_shop3: and now the pots leaking
10:14 PM rue_shop3: maybe I can patch that up tommorow
10:19 PM rue_shop1: the frequency generator is now USB controllable
10:19 PM rue_shop1: you can send it numbers like 12.6
10:20 PM rue_shop1: er, 12k6
10:20 PM rue_shop1: of 2m5
10:22 PM rue_shop1: today I'm making a chrome bezel for it
10:22 PM rue_shop1: I blew the size by 1mm, but I"m going with it
10:24 PM rue_shop1: ohohoh, and by buddy found a 2.25HP 1/2" router for the cnc machine!
10:25 PM rue_shop1: skil
10:25 PM rue_shop1: (with 1/4" collette)
10:25 PM rue_shop1: why does it seem like the internet is dead
10:26 PM zhanx: weekend
10:26 PM zhanx: i took and double checked the shelf slab to make sure it is flat
10:26 PM zhanx: its warm
10:27 PM zhanx: so i when ahead and trimmed up the sides to mostly square
10:37 PM * Tom_L thinks rue_mohr likes burnt food.
10:37 PM Tom_L: seems he eats it alot
10:41 PM zhanx: i think he does also
10:44 PM zhanx: ok crappy night photo https://i.imgur.com/6U65zVC.jpg
10:44 PM rue_mohr: quite the finished slab
10:45 PM zhanx: smooth as i can get it
10:46 PM zhanx: the fencing wire is exposed in 2 places but it will work
10:46 PM zhanx: its not quite 2" thick
10:51 PM Tom_L: what is it for?
10:51 PM zhanx: practice and a shelf under the forge
10:55 PM zhanx: Tom_L, the tools will be hot and need a safe place to set them
10:55 PM Tom_L: i'm sure of that
10:55 PM Tom_L: not a flip flop type of job either
10:56 PM zhanx: heh now!
11:02 PM Tom_L: my kids both work at the same large cnc machine shop
11:03 PM Tom_L: both were a little nervous after a guy got crushed inside one at another shop this week
11:03 PM rue_shop1: why was he in there without a lockout?
11:04 PM rue_shop3: thats stuffs not supposed to happen
11:04 PM rue_shop3: bypassed safetys maybe?
11:04 PM Tom_L: https://www.kwch.com/content/news/1-killed-in-Sedgwick-County-industrial-accident-513452511.html
11:05 PM Tom_L: he was doing maintenance on it i guess
11:05 PM rue_shop1: you linked before, they didn't say much
11:05 PM Tom_L: contract worker
11:05 PM Tom_L: oh
11:05 PM Tom_L: they're not gonna say much either
11:05 PM zhanx: rue_shop1, you said you wouldn't tell me
11:05 PM rue_shop1: if it was maintenance it shouldn't have been powered up tho
11:05 PM rue_shop1: zhanx, and I'm not, you will be ok
11:06 PM zhanx: well you said the same to Tom_L and told him
11:06 PM zhanx: so I am doubting now
11:06 PM rue_shop3: right, but wear safety goggles ok?
11:06 PM zhanx: never mind you don't get it,
11:07 PM zhanx: its the joke Tom_L is losing it and you reminded him he posted that before
11:08 PM rue_shop1: Tom_L, machinable wax, tell me a story, why not use regular wax?
11:08 PM rue_shop1: I did?
11:08 PM rue_shop1: :)
11:09 PM Tom_L: higher melting temp
11:09 PM Tom_L: he did?
11:10 PM Tom_L: it was a short story
11:10 PM rue_shop1: !! I'm a dumnbell, I should be drying this sand in the bbq!
11:10 PM rue_shop1: Tom_L, *just* a higher melting temp? thats it?!??
11:10 PM rue_shop1: its not about the way it cuts or soemthing?
11:10 PM Tom_L: i think it's got ground up plastic in it
11:11 PM Tom_L: i don't know too much about it
11:11 PM Tom_L: except it's forgiving and re'useable
11:11 PM zhanx: https://www.instructables.com/id/Machinable-Wax/
11:12 PM Tom_L: https://www.machinablewax.com/
11:12 PM Tom_L: hah they even have 3d filament
11:13 PM Tom_L: you might wanna try some for lost wax casting
11:13 PM zhanx: pricy
11:14 PM rue_shop3: I made some
11:14 PM rue_shop3: its wax and LDPE
11:14 PM Tom_L: milk cartons
11:14 PM rue_shop3: the LDPE took me a while to pin down but I got tonnes of it
11:14 PM rue_shop3: no
11:14 PM rue_shop3: er
11:14 PM rue_shop3: milk jugs are hdpe
11:14 PM Tom_L: oh
11:14 PM rue_shop3: and I tried that
11:15 PM rue_shop3: mixed results
11:15 PM rue_shop3: but the ldpe mixes right in
11:15 PM Tom_L: source?
11:15 PM rue_shop3: packing foam
11:15 PM rue_shop3: not styrofoam
11:15 PM rue_shop3: the white open cell stuff
11:16 PM Tom_L: not peanuts?
11:16 PM rue_shop3: nope
11:16 PM Tom_L: so you melted all my peanuts!!
11:16 PM rue_shop1: kinda white/clear
11:17 PM Tom_L: i don't see alot of that around here
11:20 PM rue_shop1: its one of the rarer types
11:20 PM rue_shop1: hey
11:20 PM rue_shop1: I want to understand relative humidity
11:20 PM rue_shop1: I got stuck
11:21 PM zhanx: k
11:21 PM rue_shop1: I cant find a chart of the MAX amount of water (ml/cubic whatever) that air can hold
11:21 PM rue_shop1: casue it seems that the RH is relative to that
11:21 PM zhanx: mix your temp and water columns
11:21 PM zhanx: rue_shop1, look at wet bulb temps
11:21 PM rue_shop1: will I get liters/cubic meter kinda answer?
11:22 PM rue_shop1: I want to make a desalinator
11:22 PM zhanx: well MAX amount is rain
11:22 PM Tom_L: https://en.wikipedia.org/wiki/Relative_humidity#/media/File:Relative_Humidity.png
11:22 PM rue_shop1: so I want to know how much water I can pack in the air going thru it
11:22 PM Tom_L: dew point is 100%
11:22 PM rue_shop1: ok
11:22 PM rue_shop1: so lets go there
11:23 PM rue_shop1: I also need a chart of the mass of air against something
11:23 PM zhanx: dew point is rain or forming drop lets
11:23 PM zhanx: droplets
11:23 PM rue_shop1: yea, so the salinator has to be under that
11:23 PM zhanx: mass of air how?
11:23 PM rue_shop1: well, lets say my desalinator has a evap chamber with a 90cfm fan
11:24 PM rue_shop1: I want to know how much water I can move with that 90cfm
11:24 PM rue_shop1: ideal
11:24 PM Tom_L: somewhat how a pressure cooker works
11:24 PM rue_shop1: @#$%@#^@#$^ stupid bug flies in my ear WTF!!!!
11:25 PM Tom_L: just trying to tell you something
11:25 PM Tom_L: you don't speak bug?
11:25 PM zhanx: diy air velocity meter time rue_shop1 ?
11:25 PM rue_shop1: I pushed it up against my brain with a Q-tip, its reflexes will now be mine
11:25 PM rue_shop1: well
11:26 PM rue_shop1: 1 minute
11:26 PM rue_shop1: 90cubic feet
11:26 PM rue_shop1: under ideal conditions, how much water can be in that
11:26 PM Tom_L: vapor pressure is the pressure that is exerted on the walls of a sealed container when a substance in it evaporates (converts to a gas). To find the vapor pressure at a given temperature, use the Clausius-Clapeyron equation: ln(P1/P2) = (?Hvap/R)((1/T2) - (1/T1))
11:27 PM rue_shop1: the temp can be anything I want
11:27 PM zhanx: temp matters
11:27 PM rue_shop1: I have a insulated solar box
11:27 PM Tom_L: https://m.wikihow.com/Calculate-Vapor-Pressure
11:27 PM rue_shop1: so we can say 50c is easy
11:28 PM rue_shop1: yea, I should put the van so it lowers the temp in the evap chamber and raises the pressure in the condensing chamber
11:28 PM rue_shop1: fan
11:28 PM zhanx: well at 25c 1 cm of air can hold 22 grams of water
11:28 PM rue_shop1: how about 50c
11:29 PM zhanx: 11 grams at 100% relative humidity
11:29 PM rue_shop1: ok, so that would be the limit
11:29 PM rue_shop1: whats a gram of water in ml
11:29 PM zhanx: mind you that is cubic meter not foot as its easier
11:30 PM rue_shop1: thats ok
11:30 PM rue_shop1: I have converters
11:30 PM rue_shop1: any units will do
11:30 PM rue_shop1: 1kg of water is 1l
11:30 PM zhanx: 1 gram of water is 1 ml
11:30 PM rue_shop1: ah, yea
11:30 PM Tom_L: 1g = 1 ml
11:30 PM Tom_L: you metric ppl...
11:30 PM Tom_L: i swear
11:30 PM zhanx: you are confusing me, metric and rue should be better than me
11:30 PM rue_shop1: so 11ml of water is 1ch^3 of air
11:30 PM rue_shop1: so 11ml of water is 1cm^3 of air
11:31 PM zhanx: no
11:31 PM rue_shop1: so 11ml of water is 1m^3 of air
11:31 PM rue_shop1: ?
11:31 PM zhanx: its possible 11ml can be contained in 1m^3 of air
11:31 PM rue_shop1: its the max
11:31 PM zhanx: but
11:31 PM zhanx: the max is in lab
11:32 PM rue_shop1: yes, I want to know the unobtainable line
11:32 PM zhanx: I would say 8ml of water is possible in real world in 1cm^3 of air at 50c
11:32 PM zhanx: well 8-9ml
11:33 PM Tom_L: ml = cc right?
11:33 PM zhanx: cause you forgot one thing
11:33 PM rue_shop1: so in one minute, 90cfm fan can shuttle MAX 28ml of water
11:34 PM rue_shop1: ARG BITING ME IS ON THING BUT COMACAZI MISSIONS LIKE FLYING INTO MY EYE ARE A DIFFERENT LEVEL OF WAR
11:34 PM rue_shop1: sholdn't have torn apart that bug zapper for ma
11:34 PM zhanx: 90 cfm is 153 ish cm/h which is 20ml of water
11:34 PM zhanx: 25ml max
11:36 PM zhanx: 90cfm = 2.55cmm
11:36 PM zhanx: next is math for air flow based on your design which gets more fun :D
11:37 PM Tom_L: so why exactly are you trying to move thick air?
11:37 PM zhanx: Tom_L, he said desalination
11:37 PM Tom_L: yeah he did didn't he
11:38 PM zhanx: when he still didn't give weight of salt on to remove that from the water weight
11:39 PM rue_shop1: shouldn't matter
11:39 PM rue_shop1: If I have a solar hotbox I can get it up to about any temp
11:39 PM rue_shop1: I wonder if 90 was a good ballpark tho
11:39 PM zhanx: well salt water is 35 grams per liter on average
11:40 PM rue_shop1: I would be cycling it off regularily
11:40 PM zhanx: at higher temps that goes up
11:40 PM rue_shop1: well it wouldn't me heating the pool of water
11:41 PM rue_shop1: there would be a /\/\/\/\/ of absorbent material that would just dip into the pool
11:41 PM zhanx: if you want to drink this, you should double evap it before hand
11:41 PM rue_shop1: a pump would probably intermittently flood it
11:43 PM rue_shop1: yea, 90 seems in the right range
11:43 PM rue_shop1: biab