#garfield Logs
Dec 14 2021
#garfield Calendar
12:14 AM rue_shop3: small brass rivets
12:28 AM rue_mohr: thanks rue
03:46 AM polprog: brass monkey
04:22 AM polprog_ is now known as polprog
09:07 AM rue_mohr: brass staples for terminals in cardboard
09:44 AM rue_mohr: I found some rivets too
04:08 PM polprog: https://cdn.discordapp.com/attachments/275840093254713344/920429727293009970/unknown.png
05:55 PM aandrew: I always laugh at the huge vias in old boards
06:29 PM rue_shop3: part of the trick of valves is to balance the force of the pressure out
06:29 PM rue_shop3: this valve is kinda brute-force
07:33 PM Tom_L: what valves?
07:51 PM rue_shop2: that inline one I made
07:52 PM rue_shop2: 3 lbs of force is a lot on that bearing
07:56 PM Tom_L: mmm
07:57 PM rue_shop2: I wonder if it would be better to use a bumper pin on it
07:57 PM rue_shop2: I could add more metal
07:57 PM Tom_L: esplain
07:57 PM rue_shop2: well
07:58 PM rue_shop2: right now I pull on the bearing itself
07:58 PM rue_shop2: to unseat it from the ring
07:58 PM rue_shop2: if I use a larger cylinder on metal on the inside to magnetically pull on, and have it push the bearing off the seat
07:59 PM rue_shop2: =====--> o
07:59 PM rue_shop2: then it doesn't even have to be a steel bearing
07:59 PM rue_shop2: it could be a little plastic ball
08:00 PM rue_shop2: right now it takes 1A to open at ~0.5psi
08:00 PM Tom_L: plastic ball, air movement itself would move it to the seat... undesireable
08:00 PM rue_shop2: but it stays open till about 10mA
08:01 PM rue_shop2: the idea is that magnet holds it open
08:01 PM rue_shop2: right now its re-seated by the flow
08:01 PM rue_shop2: hah, this could be a reed valve...
08:01 PM rue_shop2: hey wait
08:02 PM rue_shop2: can I make an electronic reed valve?
08:02 PM rue_shop2: lots more work than this
08:06 PM Tom_L: have you used that brass test cap any yet?
08:07 PM rue_shop2: yea, the forces in the structure to box in the reed would be stupid
08:07 PM rue_shop2: yes
08:07 PM Tom_L: work ok?
08:07 PM rue_shop2: a few times now I think
08:07 PM rue_shop2: yea, its fine
08:09 PM rue_shop2: you gonna go into production? :)
08:09 PM rue_shop2: unobtainium
08:10 PM Tom_L: no i just noticed the spare sitting on my desk
08:10 PM rue_shop2: :)
08:10 PM Tom_L: with the crooked 1/2" thread
08:10 PM rue_shop2: too bad I cant tell you how much the threads need to be tweaked by
08:10 PM Tom_L: my bud made me a plug gage
08:11 PM Tom_L: checked his with OD thread mics
08:11 PM rue_shop2: oh yea
08:11 PM Tom_L: i think he's scaling back what he does
08:12 PM Tom_L: after all he's 75-7?
08:12 PM rue_shop2: yep
08:13 PM Tom_L: one of the last true machinists
08:13 PM rue_shop2: the tricks I'll never know
08:14 PM Tom_L: alot of them, me either
08:18 PM rue_shop2: I have enough stuff, I need to build more things with it
08:19 PM rue_shop2: there are indicators that my estimate of how much stuff I needed on hand was orders of magnitude out
08:19 PM Tom_L: $0.01 pneumatic valve: https://www.aliexpress.com/item/4001245616183.html
08:19 PM rue_shop2: heh $15 shipping
08:20 PM Tom_L: not bad for 180 valves
08:20 PM rue_shop2: no, thei jack up shipping with the count
08:20 PM rue_shop2: its telling me $5+2shipping
08:21 PM rue_shop2: by 10 the shipping is 3.75
08:21 PM rue_shop2: I need 180
08:21 PM rue_shop2: er 188
08:21 PM Tom_L: this thing will be so heavy it won't lift itself
08:22 PM rue_shop2: its 12' high
08:22 PM rue_shop2: those pneumatic muscles generate a LOT of force
08:24 PM rue_shop2: if you dont try crazy things, there is no chance for success
08:26 PM Tom_L: i don't plan to set the world on fire
08:26 PM rue_shop2: I dont have to, everyone is already doing that
08:28 PM rue_shop2: I'm always too damned exhausted
08:28 PM rue_shop2: arg
08:28 PM Tom_L: you will learn to think smaller...
08:28 PM Tom_L: make manageable projects
08:28 PM Tom_L: or you will get discouraged
08:29 PM rue_shop2: its not a tree, its a forest
08:29 PM rue_shop2: I got so many distractions going by..
08:29 PM Tom_L: butterflies are getting extinct so you can't use that anymore
08:38 PM Tom_L: ok
08:38 PM Tom_L: can't think of a better valve design
08:42 PM Tom_L: and still cheap and easy to make
08:58 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/FF8r60aXwAcR5VS.jpg
08:58 PM rue_mohr: hmm
08:58 PM rue_mohr: tho I dont think I can machine all that
08:58 PM rue_mohr: I wonder if I could even get ahold of 188 solinoid coils
09:07 PM Tom_L: where did you find that?
09:07 PM Tom_L: that looks pretty complicated
09:07 PM rue_mohr: twitte
09:07 PM rue_mohr: rbut
09:07 PM Tom_L: and too large for needing 188
09:07 PM rue_mohr: the valves are the interseitng part
09:07 PM rue_mohr: I'v seen valves like that
09:07 PM rue_mohr: no there is lots of room on this thing
09:08 PM Tom_L: so you say right now
09:08 PM Tom_L: are those circles all rusted now?
09:08 PM rue_mohr: no but I need to paint up the joints
09:08 PM rue_mohr: and get the bearings worked out
09:09 PM rue_mohr: big cnc can help
09:09 PM Tom_L: mm the bearing blocks were for the cnc not this..
09:09 PM rue_mohr: yup
09:10 PM rue_mohr: looks like I'll use the 4 jaw, and dial off a dowel placed in the sprocket seats
09:10 PM rue_mohr: between the teeth
09:11 PM Tom_L: huh?
09:11 PM rue_mohr: I have to center the sprockets in the lathe to bore the hub
09:11 PM Tom_L: oh
09:11 PM rue_mohr: I cant grab them by the outside of the teeth, my chuck is too small
09:11 PM Tom_L: what about the outter ring below the teeth?
09:11 PM rue_mohr: the hub
09:12 PM rue_mohr: oh, no, the chuck jaws are too big to fit
09:12 PM Tom_L: show me the pic again..
09:12 PM Tom_L: i kinda forgot what the sprockets looked like
09:13 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1220077.jpg
09:13 PM rue_mohr: http://ruemohr.org/~ircjunk/tempimage/p1220078.jpg
09:13 PM rue_mohr: I have to bore them for 1.25" pipe
09:13 PM Tom_L: all the same teeth?
09:13 PM rue_mohr: yep
09:13 PM Tom_L: turn them down to fit inside or cut a hole?
09:14 PM Tom_L: pipe fits inside the aluminum...
09:14 PM rue_mohr: yea
09:14 PM rue_mohr: there is lots left between the sprocket and the pipe once its bored
09:14 PM Tom_L: what's the extra blocks for?
09:14 PM rue_mohr: their for the bearing blocks
09:15 PM rue_mohr: to adapt the pipe to the inside of the bearing
09:15 PM Tom_L: make a face plate with some threaded holes and clamp them to it
09:15 PM Tom_L: you can center them that way
09:16 PM rue_mohr: I suspect the 4 jaw is just as much work
09:16 PM rue_mohr: I can grab the hub
09:16 PM Tom_L: ok
09:16 PM Tom_L: and the hub is centered?
09:16 PM rue_mohr: no, I just made it round
09:16 PM rue_mohr: shaved off all the casting stuff
09:16 PM rue_mohr: I mean, its close
09:16 PM rue_mohr: +- 0.2"
09:19 PM Tom_L: i'm thinking you could punch a hole in them with a 1" hole saw to avoid having to remove all that material then center them up and finish boring them to size
09:20 PM Tom_L: hole saw may not be that thick
09:20 PM Tom_L: meh, scrap that idea
09:30 PM rue_mohr: its not an issue to bore it out
09:30 PM rue_mohr: what i'm more worried about is that fact that I'm putting it on pipe
09:30 PM Tom_L: lots of force to hold
09:30 PM rue_mohr: so its gonna be a bit big
09:31 PM rue_mohr: and yet I want to keep it centered
09:31 PM Tom_L: oversize you mean?
09:31 PM rue_mohr: yea
09:31 PM rue_mohr: to get on the pipe
09:31 PM Tom_L: might have to press it some
09:31 PM rue_mohr: the pipe itself is pretty straight
09:32 PM Tom_L: until you start measuring it with precision tools
09:32 PM rue_mohr: the precision of this thing will not be insane
09:32 PM Tom_L: i know
09:32 PM rue_mohr: 0.1-0.5mm is the target
09:32 PM rue_mohr: I have an encoder and some gear belt for real feedback on the position
09:33 PM rue_mohr: I have to work out lash
09:33 PM rue_mohr: the two motor idea is a thing, I need to make a test jig
09:33 PM rue_mohr: keep the drive train under tension
09:33 PM Tom_L: why not a tension pulley?
09:33 PM Tom_L: like cars do
09:34 PM rue_mohr: the chain has slop and the gear boxes have slop
09:34 PM Tom_L: they use chain on cams just fine
09:34 PM rue_mohr: these are bike chains
09:34 PM rue_mohr: used ones
09:34 PM Tom_L: ok
09:35 PM rue_mohr: if I keep it under a set tension, it doen't matter
09:35 PM Tom_L: if you cut one direction it doesn't matter. if you cut 2 it will
09:36 PM rue_mohr: it should be ok if I have dynamic tension
09:36 PM rue_mohr: aka, two motors pulling against each other
09:36 PM Tom_L: i see that going all sorts of bad
09:36 PM rue_mohr: :)
09:36 PM Tom_L: but i know little about that
09:36 PM rue_mohr: see if I can make it work
09:36 PM rue_mohr: I might do things with threaded rod just to get it up and going
09:37 PM Tom_L: that long, the rod will whip
09:37 PM rue_mohr: if I could use it to make some of its parts it would be handy
09:37 PM rue_mohr: no, just part of the bed
09:37 PM rue_mohr: I dont want threaded rod for long, its tooo slow
09:38 PM rue_mohr: even if I could dial it up to 10k and spin the nut
09:38 PM Tom_L: i know
09:38 PM rue_mohr: whats 5/8" thread?
09:38 PM rue_mohr: 13?
09:38 PM Tom_L: sounds about right
09:39 PM Tom_L: 11 18 or24
09:39 PM rue_mohr: huh, 10k is 12"/sec
09:39 PM rue_mohr: thats not reaaaaaly that fast tho
09:39 PM rue_mohr: not for jogging
09:40 PM Tom_L: iirc my kid said his machine rapids around 2k ipm
09:40 PM rue_mohr: yea well
09:40 PM Tom_L: it's about the size of a small house too
09:40 PM Tom_L: gantry
09:40 PM rue_mohr: I suppose I could just take on some more patience too
09:40 PM rue_mohr: 4x8 is the size of a house in my context :)
09:40 PM Tom_L: heh
09:41 PM Tom_L: his slabs are 25' long
09:41 PM rue_mohr: I should bang togethor the controller for it
09:41 PM Tom_L: 6" thick
09:41 PM rue_mohr: yea, I'm excited at being able to do 12"x24" stuff
09:41 PM Tom_L: that's a good size
09:41 PM rue_mohr: one of the first projects is a holder for the socket set
09:42 PM Tom_L: series of holes?
09:42 PM rue_mohr: but in reality, the machine itself will be its first project
09:42 PM rue_mohr: yea
09:42 PM rue_mohr: and maybe slots
09:42 PM rue_mohr: I have a custom set with the metric+imperial thing going on
09:42 PM Tom_L: i need to find something to make but it has to be useful because i have no room for junk
09:42 PM rue_mohr: I tried 3d printing holders in pieces and it didn't work out
09:43 PM rue_mohr: and I can make furniture on this thing
09:44 PM Tom_L: are the numbers rising in your area again yet?
09:44 PM Tom_L: they seem to be here
09:49 PM rue_mohr: I suspect numbers till always be rising
09:49 PM rue_mohr: its an industry now
09:49 PM rue_mohr: one vaccine wasn't enough, it'll require booster shots forever
09:49 PM rue_mohr: everyone knows you dont make money without annual fees
09:50 PM rue_mohr: which car is it that you need to pay $80/mo for the remote start button to work?
09:51 PM Tom_L: no idea
09:52 PM Tom_L: i would really like to know the truth about it but i bet that will never be disclosed
09:54 PM rue_mohr: more money was made over managing cancer research then ever went into the research
09:54 PM rue_mohr: now that covid has some along, they will need another gig
09:55 PM rue_mohr: when will we start seeing donation collection companies for covid research
10:30 PM Tom_L: lucky if i don't lose power tomorrow
10:30 PM Tom_L: 14 school districts have closed due to the high wind tomorrow
10:30 PM Tom_L: 50-70mph gusts sustained 20-50mph depending where you are
10:31 PM rue_mohr: your in tornado alley
10:31 PM rue_mohr: you should go traveling this year
10:31 PM rue_mohr: its not a good year to be there
10:31 PM Tom_L: not a good year to be
10:31 PM Tom_L: period
10:31 PM rue_mohr: you insured against that junk?
10:31 PM Tom_L: i hope so
10:31 PM rue_mohr: would the garage break the cnc?
10:32 PM Tom_L: not the main parts
10:32 PM rue_mohr: :)
10:32 PM Tom_L: the control is hanging on the garage wall
10:32 PM rue_mohr: there is a project to work on next!
10:33 PM rue_mohr: maybe pull-away connectors!
10:33 PM rue_mohr: write your name and address on the control box atleast
10:33 PM rue_mohr: someone might have the courtesy to return it
10:34 PM rue_mohr: if you choose to stay, can you take good shelter in the basement?
10:34 PM Tom_L: i'm not too worried really
10:34 PM rue_mohr: they never are
10:35 PM rue_mohr: and they make a new trailer park in the same damn spot
10:35 PM Tom_L: what happened in van that they were cut off for some time?
10:35 PM rue_mohr: oh big wind storm up there
10:35 PM rue_mohr: and the flooding
10:35 PM rue_mohr: wholy gazoo the flooding
10:35 PM rue_mohr: the highways were flooded up to the top of the dividers
10:36 PM Tom_L: your coast road washed out once didn't it?
10:36 PM rue_mohr: washed out that time further down (way further down)
10:37 PM rue_mohr: hmm where is my video
10:40 PM Tom_L: i think you showed me a culvert maybe
10:41 PM rue_mohr: found it...
10:41 PM rue_mohr: https://twitter.com/RueNahcMohr/status/1460342551756505088
10:41 PM rue_mohr: this was the highway to work
10:42 PM rue_mohr: creek culvert was blocked up
10:42 PM Tom_L: doesn't look safe to pass for sure
10:45 PM rue_mohr: when I went into work it wasn't that bad
10:45 PM rue_mohr: that was at lunch
10:45 PM rue_mohr: (the mall is right behind me)
10:45 PM rue_mohr: there is a little grassy lawn over the road there, everyone was standing there taking pictures
10:46 PM Tom_L: heh
10:47 PM rue_mohr: that area that washed out here is still on the move, they have an excavator parked there and dropped off more loads of rocks
10:48 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/temp/Flood/Flood_canal2.jpg
10:48 PM Tom_L: http://tom-itx.no-ip.biz:81/~webpage/temp/Flood/Flood_canal1.jpg
10:48 PM Tom_L: that's normally empty
10:48 PM Tom_L: 2nd pic is from a bridge north of the highway
10:49 PM Tom_L: not quite to the top but i have seen it at the top before
10:49 PM rue_mohr: huh
10:49 PM Tom_L: when it is, so is the river that runs thru town
10:49 PM Tom_L: it's our floodway
10:49 PM rue_mohr: these are our icecaps
10:49 PM Tom_L: i forget when that was but somewhat recent
10:50 PM rue_mohr: ok I'm gonna try to get some sleep
10:51 PM Tom_L: me too
10:51 PM Tom_L: later
10:51 PM rue_mohr: night